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first commit, everything should be functional as-is

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moparisthebest 2013-08-01 12:09:44 -04:00
commit e8629d78b6
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.gitignore vendored Normal file
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.idea/
*.iml
*/target/
target/
*~

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core/pom.xml Executable file
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<?xml version="1.0" encoding="UTF-8"?>
<!--
~ jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
~ combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
~ Copyright (C) 2013 Travis Burtrum (moparisthebest)
~
~ This library is free software; you can redistribute it and/or
~ modify it under the terms of the GNU Lesser General Public
~ License as published by the Free Software Foundation; either
~ version 2.1 of the License, or (at your option) any later version.
~
~ This library is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
~ Lesser General Public License for more details.
~
~ You should have received a copy of the GNU Lesser General Public
~ License along with this library; if not, write to the Free Software
~ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>com.moparisthebest.jbgjob</groupId>
<artifactId>jbgjob</artifactId>
<version>0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>core</artifactId>
<profiles>
<profile>
<id>run-tests</id>
<activation>
<property>
<name>maven.test.skip</name>
<value>false</value>
</property>
</activation>
<build>
<plugins>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>

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core/src/main/java/com/moparisthebest/jbgjob/AbstractScheduler.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
public abstract class AbstractScheduler implements Scheduler {
public static final String defaultQueue = System.getProperty("scheduler.default.queue", "default");
@Override
public <T> boolean schedule(final Class<? extends BackgroundJob<T>> bgClass, final T dto) {
return schedule(defaultQueue, bgClass, dto);
}
@Override
public <T> boolean schedule(final String queue, final Class<? extends BackgroundJob<T>> bgClass, final T dto) {
if (queue == null || bgClass == null || dto == null)
throw new NullPointerException("No parameters can be null!");
return schedule(queue, new ScheduledItem<T>(bgClass, dto));
}
@Override
public <T> boolean schedule(final String queue, final ScheduledItem<T> scheduledItem) {
if (queue == null || scheduledItem == null)
throw new NullPointerException("No parameters can be null!");
return true;
}
@Override
public void close() {
//nothing to close here
}
}

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core/src/main/java/com/moparisthebest/jbgjob/BackgroundJob.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
/**
* Represents a background job to operate on a DTO. This is guaranteed to be ran in a single thread only, but may be
* ran on any number of DTOs before being discarded.
* <p/>
* An implementing class MUST have a public no-args constructor to instantiate this by.
*/
public interface BackgroundJob<T> {
/**
* Process this DTO now, in this thread.
*
* @param dto dto to be processed
*/
public void process(T dto);
}

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core/src/main/java/com/moparisthebest/jbgjob/ScheduledItem.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import com.moparisthebest.jbgjob.pool.ObjectPool;
import com.moparisthebest.jbgjob.result.ExecutionResult;
/**
* Storage class that can be used by an implementation of Scheduler
*/
public class ScheduledItem<T> implements Runnable {
public final Class<? extends BackgroundJob<T>> bgClass;
//@com.fasterxml.jackson.annotation.JsonTypeInfo(use = com.fasterxml.jackson.annotation.JsonTypeInfo.Id.CLASS)
public final T dto;
private ObjectPool pool;
private ExecutionResult result;
public ScheduledItem() {
this(null, null);
}
public ScheduledItem(Class<? extends BackgroundJob<T>> bgClass, T dto) {
this.bgClass = bgClass;
this.dto = dto;
}
@Override
public void run() {
BackgroundJob<T> bgJob = null;
try {
bgJob = pool == null ? bgClass.newInstance() : pool.getResource(bgClass);
bgJob.process(dto);
if (result != null)
result.success();
} catch (Throwable e) {
if (result != null)
result.error(e);
} finally {
if (pool != null && bgJob != null)
try {
pool.releaseResource(bgJob);
} catch (Throwable e) {
e.printStackTrace();
}
}
}
public void setPool(ObjectPool pool) {
this.pool = pool;
}
public void setResult(ExecutionResult result) {
this.result = result;
}
@Override
public String toString() {
return "ScheduledItem{" +
"bgClass=" + bgClass +
", dto=" + dto +
"} " + super.toString();
}
}

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core/src/main/java/com/moparisthebest/jbgjob/ScheduledItemExecutor.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import com.moparisthebest.jbgjob.pool.ObjectPool;
import com.moparisthebest.jbgjob.result.ExecutionResult;
import java.io.Closeable;
import java.util.concurrent.*;
/**
* Using a ThreadPool with a configurable number of Threads and an ObjectPool, schedules jobs to be executed in the future.
*/
public class ScheduledItemExecutor implements Closeable {
public static final int defaultNumThreads;
static {
int numThreads = 5; // 5 threads by default
try {
numThreads = Integer.parseInt(System.getProperty("scheduler.executor.numThreads", numThreads + ""));
} catch (Throwable e) {
e.printStackTrace();
}
defaultNumThreads = numThreads;
}
private final ExecutorService executor;
private final ObjectPool pool;
public ScheduledItemExecutor() {
this(true);
}
public ScheduledItemExecutor(final boolean blockAddWhenSaturated) {
this(defaultNumThreads, blockAddWhenSaturated);
}
public ScheduledItemExecutor(final int numThreads, final boolean blockAddWhenSaturated) {
this.pool = new ObjectPool(numThreads);
// grr...
// http://stackoverflow.com/questions/2001086/how-to-make-threadpoolexecutors-submit-method-block-if-it-is-saturated
// https://today.java.net/pub/a/today/2008/10/23/creating-a-notifying-blocking-thread-pool-executor.html
// http://stackoverflow.com/questions/3446011/threadpoolexecutor-block-when-queue-is-full/3518588#3518588
this.executor = !blockAddWhenSaturated ? Executors.newFixedThreadPool(numThreads) :
new ThreadPoolExecutor(numThreads, numThreads,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>()) {
private final Semaphore semaphore = new Semaphore(numThreads);
@Override
public void execute(final Runnable command) {
// acquire a lock
boolean lockAcquired = false;
do {
try {
semaphore.acquire();
lockAcquired = true;
} catch (Throwable e) {
}
} while (!lockAcquired);
// run it
try {
super.execute(new Runnable() {
@Override
public void run() {
try {
command.run();
} finally {
semaphore.release();
}
}
});
} catch (RuntimeException e) {
semaphore.release();
throw e;
}
}
};
}
public <T> void execute(final ScheduledItem<T> scheduledItem) {
this.execute(scheduledItem, null);
}
public <T> void execute(final ScheduledItem<T> scheduledItem, final ExecutionResult result) {
scheduledItem.setPool(pool);
scheduledItem.setResult(result);
executor.execute(scheduledItem);
}
@Override
public void close() {
executor.shutdown();
}
}

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core/src/main/java/com/moparisthebest/jbgjob/Scheduler.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import java.io.Closeable;
/**
* This schedules a DTO to be processed by an instance of a particular BackgroundJob
* <p/>
* This class needs to be entirely Thread-Safe, it is generally meant to be declared final and static and accessed from a single place.
*/
public interface Scheduler extends Closeable {
/**
* This schedules a DTO to be processed by an instance of a particular BackgroundJob in the default queue.
*
* @param bgClass BackgroundJob to process the DTO
* @param dto to be processed in the background
* @param <T> Type of DTO
* @return true if scheduling was successful, false otherwise
*/
public <T> boolean schedule(final Class<? extends BackgroundJob<T>> bgClass, final T dto);
/**
* This schedules a DTO to be processed by an instance of a particular BackgroundJob in the specified queue.
*
* @param bgClass BackgroundJob to process the DTO
* @param dto to be processed in the background
* @param <T> Type of DTO
* @return true if scheduling was successful, false otherwise
*/
public <T> boolean schedule(final String queue, final Class<? extends BackgroundJob<T>> bgClass, final T dto);
public <T> boolean schedule(final String queue, final ScheduledItem<T> scheduledItem);
}

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core/src/main/java/com/moparisthebest/jbgjob/pool/ObjectPool.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.pool;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.HashMap;
import java.util.Map;
/**
* Represents pools of objects grouped by Class, if one isn't available when requested a new one is constructed with a default constructor.
*/
public class ObjectPool {
protected final int queueSize;
protected final Map<Class, Deque> pool = new HashMap<Class, Deque>();
public ObjectPool() {
this(16);
}
public ObjectPool(int queueSize) {
this.queueSize = queueSize;
}
@SuppressWarnings({"unchecked"})
public <T> T getResource(Class<T> obClass) throws IllegalAccessException, InstantiationException {
if (obClass == null)
throw new NullPointerException("Class cannot be null!");
synchronized (pool) {
Deque deque = pool.get(obClass);
if (deque == null) {
deque = new ArrayDeque(queueSize);
pool.put(obClass, deque);
}
return deque.isEmpty() ? obClass.newInstance() : (T) deque.pop();
}
}
@SuppressWarnings({"unchecked"})
public <T> void releaseResource(T resource) {
if (resource == null)
throw new NullPointerException("Released resource cannot be null!");
synchronized (pool) {
pool.get(resource.getClass()).push(resource);
System.out.println("pool: " + pool);
}
}
@Override
public String toString() {
return "ObjectPool{" +
"queueSize=" + queueSize +
", pool=" + pool +
"} " + super.toString();
}
}

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core/src/main/java/com/moparisthebest/jbgjob/result/ExecutionResult.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.result;
/**
* Callback used by ScheduledItemExecutor
*/
public interface ExecutionResult {
public void success();
public void error(Throwable e);
}

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core/src/main/java/com/moparisthebest/jbgjob/result/PrintStackTraceExecutionResult.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.result;
/**
* Does nothing on any result, except prints errors
*/
public class PrintStackTraceExecutionResult implements ExecutionResult {
@Override
public void success() {
}
@Override
public void error(Throwable e) {
e.printStackTrace();
}
}

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core/src/test/java/com/moparisthebest/jbgjob/AbstractSchedulerTests.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import com.moparisthebest.jbgjob.test.PrintDTO;
import com.moparisthebest.jbgjob.test.PrintDTOChild;
import com.moparisthebest.jbgjob.test.PrintingJob;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Test;
public class AbstractSchedulerTests {
public static Scheduler bg;
@AfterClass
public static void closeBg() throws Throwable {
if (bg != null)
bg.close();
}
@Test
public void testScheduleDTO() throws Throwable {
Assert.assertTrue(bg.schedule(PrintingJob.class, new PrintDTO()));
}
@Test
public void testScheduleChildDTO() throws Throwable {
Assert.assertTrue(bg.schedule(PrintingJob.class, new PrintDTOChild()));
}
@Test
public void testScheduleErrorCausingDTO() throws Throwable {
Assert.assertTrue(bg.schedule(PrintingJob.class, new PrintDTO(true)));
}
@Test
public void testFastJobs() throws Throwable {
int x = 0;
for (; x < 10; ++x)
Assert.assertTrue(bg.schedule(PrintingJob.class, new PrintDTO("fastJob " + x)));
Thread.sleep(5000);
for (; x < 20; ++x)
Assert.assertTrue(bg.schedule(PrintingJob.class, new PrintDTO("fastJob " + x)));
}
}

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core/src/test/java/com/moparisthebest/jbgjob/test/PrintDTO.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.test;
public class PrintDTO {
private static final int maxSleep = 10000;
private static final int minSleep = 2000;
private final String message;
private final int sleep = minSleep + (int) (Math.random() * ((maxSleep - minSleep) + 1));
private final boolean throwException;
public PrintDTO() {
this(false);
}
public PrintDTO(boolean throwException) {
this("default test message", throwException);
}
public PrintDTO(String message) {
this(message, false);
}
public PrintDTO(String message, boolean throwException) {
this.message = message;
this.throwException = throwException;
}
public String getMessage() {
return message;
}
public int getSleep() {
return sleep;
}
public boolean isThrowException() {
return throwException;
}
@Override
public String toString() {
return "PrintDTO{" +
"message='" + message + '\'' +
", sleep=" + sleep +
", throwException=" + throwException +
"} " + super.toString();
}
}

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core/src/test/java/com/moparisthebest/jbgjob/test/PrintDTOChild.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.test;
public class PrintDTOChild extends PrintDTO {
@Override
public String toString() {
return "PrintDTOChild{} " + super.toString();
}
}

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core/src/test/java/com/moparisthebest/jbgjob/test/PrintingJob.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.test;
import com.moparisthebest.jbgjob.BackgroundJob;
import java.util.concurrent.atomic.AtomicInteger;
public class PrintingJob implements BackgroundJob<PrintDTO> {
private static final AtomicInteger instanceCount = new AtomicInteger(-1);
private final int instance;
public PrintingJob() {
System.out.println("new instance of PrintingJob created in thread: " + Thread.currentThread().getName());
instance = instanceCount.incrementAndGet();
}
@Override
public void process(PrintDTO dto) {
System.out.printf("++++++++++++\nPrintingJob(%d): %s\ncurrent thread: %s\n--------------\n", instance, dto, Thread.currentThread().getName());
try {
Thread.sleep(dto.getSleep());
} catch (InterruptedException e) {
}
if (dto.isThrowException())
throw new RuntimeException("oh my, something quite unexpected happened!");
}
@Override
public String toString() {
return String.format("PrintingJob(%d)", instance);
}
}

502
license.txt Normal file
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@ -0,0 +1,502 @@
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That's all there is to it!

105
pom.xml Executable file
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<?xml version="1.0" encoding="UTF-8"?>
<!--
~ jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
~ combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
~ Copyright (C) 2013 Travis Burtrum (moparisthebest)
~
~ This library is free software; you can redistribute it and/or
~ modify it under the terms of the GNU Lesser General Public
~ License as published by the Free Software Foundation; either
~ version 2.1 of the License, or (at your option) any later version.
~
~ This library is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
~ Lesser General Public License for more details.
~
~ You should have received a copy of the GNU Lesser General Public
~ License along with this library; if not, write to the Free Software
~ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>org.sonatype.oss</groupId>
<artifactId>oss-parent</artifactId>
<version>7</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.moparisthebest.jbgjob</groupId>
<artifactId>jbgjob</artifactId>
<version>0.1-SNAPSHOT</version>
<name>jbgjob</name>
<description>
jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
</description>
<url>https://github.com/moparisthebest/jBgJob</url>
<organization>
<name>moparisthebest.com</name>
<url>http://www.moparisthebest.com</url>
</organization>
<developers>
<developer>
<id>moparisthebest</id>
<name>Travis Burtrum</name>
<email>admin@moparisthebest.com</email>
<url>http://www.moparisthebest.com/</url>
</developer>
</developers>
<scm>
<connection>scm:git:https://github.com/moparisthebest/jBgJob.git</connection>
<developerConnection>scm:git:https://github.com/moparisthebest/jBgJob.git</developerConnection>
<url>https://github.com/moparisthebest/jBgJob</url>
</scm>
<licenses>
<license>
<name>GNU Lesser General Public License, Version 2.1</name>
<url>http://www.gnu.org/licenses/lgpl-2.1.html</url>
</license>
</licenses>
<packaging>pom</packaging>
<properties>
<maven.test.skip>true</maven.test.skip>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<modules>
<module>core</module>
<module>threadscheduler</module>
<module>redisscheduler</module>
<module>redisprocessor</module>
</modules>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
<debug>false</debug>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>run-tests</id>
<activation>
<property>
<name>maven.test.skip</name>
<value>false</value>
</property>
</activation>
</profile>
</profiles>
</project>

61
readme.md Normal file
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@ -0,0 +1,61 @@
# jBgJob
jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
Sample Usage
```java
// somewhere in your application, you probably only need one instance
public static final Scheduler bgScheduler = new ThreadScheduler();
// or
public static final Scheduler bgScheduler = new RedisScheduler();
// then, to schedule a background job anywhere in your code
if(bgScheduler.schedule(PrintingJob.class, new PrintDTO())
System.out.println("job successfully scheduled!");
else
System.out.println("error scheduling job, handle...");
// for definitions of referenced PrintingJob and PrintDTO, look in the included test classes
```
Basically, you implement the method BackgroundJob.process(T dto), then use an implementation of Scheduler to schedule any number of DTOs to be processed by that BackgroundJob in a particular queue. Wherever those jobs end up getting executed at, an instance of that BackgroundJob gets created and potentially cached to process as many of those DTOs as is needed. Each instance of BackgroundJob is guaranteed to only run in a single thread so it doesn't need to worry about concurrency. ScheduledItemExecutor, used by all currently implemented processors, currently creates instances of particular BackgroundJob's when needed up to the number of threads running in the thread pool and caches them when not being used, using ObjectPool.
There are currently two implementations of Scheduler:
* ThreadScheduler - This starts a Thread pool in the current JVM and schedules DTOs to be processed in it. This is surely useful for testing when no redis instance is available, but may be useful for small amounts of asynchronous jobs you may want to schedule as well.
* RedisScheduler - This serializes DTOs to a [redis][1] list acting as a FIFO queue, which can then be read and processed by an instance of RedisThread running anywhere with access to the same redis server.
There are currently three implementations of a Redis Processor:
* RedisThread: Simply reads from the specified queue with BRPOP and processes the job, no errors are recorded and there is no visibility into which jobs are currently being processed.
* RedisProcessingQueueThread: Extends RedisThread, but reads from the queue with BRPOPLPUSH, pushing into a 'processing' queue and then removes the job from the processing queue when finished, either after success or an error.
* RedisErrorQueueThread: Extends RedisProcessingQueueThread, but if the job ends in an error (throws Throwable), a serialized ScheduledItemError is placed into the 'error' queue with the currentTimeMillis the exception occurred, the full stack trace, and the job that caused it. This can then be examined programmatically or manually later with the possibility of fixing the issue and re-running the job.
Useful system properties (set with -DpropertyName=propertyValue)
------------
* scheduler.executor.numThreads (default '5'): Number of threads in each ScheduledItemExecutor ThreadPool
* scheduler.default.queue (default 'default'): Queue to place job in when no queue is specified
* redis.host (default 'localhost'): Redis host to connect to
* redis.debug (default 'false'): Print debug statements about interaction with redis, useful for development
* redis.queuePrefix (default java.net.InetAddress.getLocalHost().getHostName()): Prefix to place in front of queue name, so one redis instance can be used by multiple machines if desired
* redis.timeout (default '5'): Used in RedisThread, timeout for blocking reads waiting for items to be put in the queue. After each timeout it checks the key queuePrefix + 'shutdown' for value 'shutdown' to see if it should shutdown after processing what it has already read.
* redis.maxTimeoutsBeforeClose (default '0' (never close)): If greater than 0, will shutdown after this many read timeouts, probably only useful for automated testing, or making it shutdown after processing the entire queue.
* redis.processingQueueSuffix (default 'processing'): Only used in instances of RedisProcessingQueueThread, suffix to add onto queue name for name of processing queue
* redis.errorQueueSuffix (default 'error'): Only used in instances of RedisErrorQueueThread, suffix to add onto queue name for name of error queue
As an illustration, for host 'foo', using all the defaults above the default redis queue would be 'foo-default', the processing queue would be 'foo-default-processing' and the error queue would be 'foo-default-error'.
Licensing
------------
This project is licensed under the [GNU/LGPLv2.1][2], which allows use in Open Source or Proprietary programs. If you need to modify this code though, you should contribute back to it.
Contributing
------------
1. Fork it. (Alternatively, if you **really** can't use github/git, email me a patch.)
2. Create a branch (`git checkout -b my_jBgJob`)
3. Commit your changes (`git commit -am "Implemented method X"`)
4. Push to the branch (`git push origin my_jBgJob`)
5. Open a [Pull Request][3]
6. Enjoy a refreshing beverage and wait
[1]: http://redis.io/
[2]: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
[3]: https://github.com/moparisthebest/jBgJob/pulls

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<?xml version="1.0" encoding="UTF-8"?>
<!--
~ jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
~ combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
~ Copyright (C) 2013 Travis Burtrum (moparisthebest)
~
~ This library is free software; you can redistribute it and/or
~ modify it under the terms of the GNU Lesser General Public
~ License as published by the Free Software Foundation; either
~ version 2.1 of the License, or (at your option) any later version.
~
~ This library is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
~ Lesser General Public License for more details.
~
~ You should have received a copy of the GNU Lesser General Public
~ License along with this library; if not, write to the Free Software
~ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>com.moparisthebest.jbgjob</groupId>
<artifactId>jbgjob</artifactId>
<version>0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>redisprocessor</artifactId>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>redisscheduler</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<minimizeJar>false</minimizeJar>
<createDependencyReducedPom>false</createDependencyReducedPom>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.moparisthebest.jbgjob.processor.RedisErrorQueueThread</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>run-tests</id>
<activation>
<property>
<name>maven.test.skip</name>
<value>false</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>core</artifactId>
<version>${project.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
</profile>
</profiles>
</project>

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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import com.moparisthebest.jbgjob.result.ExecutionResult;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
/**
* If the job ends in an error (throws Throwable), a serialized ScheduledItemError is placed into the 'error' queue with
* the currentTimeMillis the exception occurred, the full stack trace, and the job that caused it. This can then be
* examined programmatically or manually later with the possibility of fixing the issue and re-running the job.
*/
public class RedisErrorQueueThread extends RedisProcessingQueueThread {
public static final String defaultErrorQueueSuffix;
static {
final String suffix = System.getProperty("redis.errorQueueSuffix");
defaultErrorQueueSuffix = (suffix == null || suffix.isEmpty()) ? "-error" : ("-" + suffix);
}
public final String errorQueue;
public RedisErrorQueueThread() {
this(defaultErrorQueueSuffix);
}
public RedisErrorQueueThread(String errorQueueSuffix) {
this(defaultProcessingQueueSuffix, errorQueueSuffix);
}
public RedisErrorQueueThread(String processingQueueSuffix, String errorQueueSuffix) {
this(defaultQueue, processingQueueSuffix, errorQueueSuffix);
}
public RedisErrorQueueThread(String queue, String processingQueueSuffix, String errorQueueSuffix) {
this(null, queue, processingQueueSuffix, errorQueueSuffix);
}
public RedisErrorQueueThread(JedisPool pool, String queue, String processingQueueSuffix, String errorQueueSuffix) {
this(defaultQueuePrefix, pool, queue, processingQueueSuffix, errorQueueSuffix);
}
public RedisErrorQueueThread(String queuePrefix, JedisPool pool, String queue, String processingQueueSuffix, String errorQueueSuffix) {
super(queuePrefix, pool, queue, processingQueueSuffix);
this.errorQueue = this.queue + errorQueueSuffix;
}
protected ExecutionResult getExecutionResult(final String scheduledItemString) {
return new RemoveFromProcessingQueuePutErrorQueue(scheduledItemString);
}
protected class RemoveFromProcessingQueuePutErrorQueue extends RemoveFromProcessingQueueOnCompletion {
public RemoveFromProcessingQueuePutErrorQueue(String scheduledItemString) {
super(scheduledItemString);
}
@Override
public void error(Throwable e) {
e.printStackTrace();
// success, so remove 1 from processing queue
Jedis jedis = null;
try {
jedis = pool.getResource();
// push to error queue
final String error = om.writeValueAsString(new ScheduledItemError(e, scheduledItemString));
if (debug) System.out.printf("redis> LPUSH %s \"%s\"\n", errorQueue, error);
jedis.lpush(errorQueue, error);
// remove from processing queue
removeFromProcessingQueue(jedis);
} catch (Throwable e2) {
e2.printStackTrace();
} finally {
tryReturn(jedis);
}
}
}
@Override
void deleteQueue() {
deleteQueue(queue, processingQueue, errorQueue);
}
public static void main(String[] args) {
// set all needed arguments with system properties
new RedisErrorQueueThread().run();
}
}

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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import com.moparisthebest.jbgjob.result.ExecutionResult;
import com.moparisthebest.jbgjob.result.PrintStackTraceExecutionResult;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
/**
* Reads from the queue with BRPOPLPUSH, pushing into a 'processing' queue and then removes the job from the processing queue when finished, either after success or an error.
*/
public class RedisProcessingQueueThread extends RedisThread {
public static final String defaultProcessingQueueSuffix;
static {
final String suffix = System.getProperty("redis.processingQueueSuffix");
defaultProcessingQueueSuffix = (suffix == null || suffix.isEmpty()) ? "-processing" : ("-" + suffix);
}
public final String processingQueue;
public RedisProcessingQueueThread() {
this(defaultProcessingQueueSuffix);
}
public RedisProcessingQueueThread(String processingQueueSuffix) {
this(defaultQueue, processingQueueSuffix);
}
public RedisProcessingQueueThread(String queue, String processingQueueSuffix) {
this(null, queue, processingQueueSuffix);
}
public RedisProcessingQueueThread(JedisPool pool, String queue, String processingQueueSuffix) {
this(defaultQueuePrefix, pool, queue, processingQueueSuffix);
}
public RedisProcessingQueueThread(String queuePrefix, JedisPool pool, String queue, String processingQueueSuffix) {
super(queuePrefix, pool, queue);
this.processingQueue = this.queue + processingQueueSuffix;
}
@Override
protected String pollRedis(final Jedis jedis, final int timeout) {
if (debug) System.out.printf("redis> BRPOPLPUSH %s %s %d\n", queue, processingQueue, timeout);
return jedis.brpoplpush(queue, processingQueue, timeout);
}
protected ExecutionResult getExecutionResult(final String scheduledItemString) {
return new RemoveFromProcessingQueueOnCompletion(scheduledItemString);
}
protected class RemoveFromProcessingQueueOnCompletion extends PrintStackTraceExecutionResult {
protected final String scheduledItemString;
public RemoveFromProcessingQueueOnCompletion(String scheduledItemString) {
this.scheduledItemString = scheduledItemString;
}
protected void removeFromProcessingQueue(Jedis jedis) {
boolean returnJedis = jedis == null;
try {
if (returnJedis)
jedis = pool.getResource();
if (debug) System.out.printf("redis> LREM %s 1 \"%s\"\n", processingQueue, scheduledItemString);
jedis.lrem(processingQueue, 1, scheduledItemString);
} catch (Throwable e) {
e.printStackTrace();
} finally {
if (returnJedis)
tryReturn(jedis);
}
}
@Override
public void success() {
// success, so remove 1 from processing queue
removeFromProcessingQueue(null);
}
@Override
public void error(Throwable e) {
super.error(e);
removeFromProcessingQueue(null);
}
}
@Override
void deleteQueue() {
deleteQueue(queue, processingQueue);
}
public static void main(String[] args) {
// set all needed arguments with system properties
new RedisProcessingQueueThread().run();
}
}

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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import com.moparisthebest.jbgjob.AbstractScheduler;
import com.moparisthebest.jbgjob.RedisScheduler;
import com.moparisthebest.jbgjob.ScheduledItem;
import com.moparisthebest.jbgjob.ScheduledItemExecutor;
import com.moparisthebest.jbgjob.result.ExecutionResult;
import com.moparisthebest.jbgjob.result.PrintStackTraceExecutionResult;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import java.util.Arrays;
import java.util.List;
/**
* Simply reads from the specified queue with BRPOP and processes the job, no errors are recorded and there is no visibility into which jobs are currently being processed.
*/
public class RedisThread extends RedisScheduler implements Runnable {
public static final int defaultTimeout;
public static final int maxTimeoutsBeforeClose;
public static int getIntSystemProperty(final String property, final int timeout) {
try {
return Integer.parseInt(System.getProperty(property, timeout + ""));
} catch (Throwable e) {
e.printStackTrace();
return timeout;
}
}
static {
defaultTimeout = getIntSystemProperty("redis.timeout", 5);// 5 seconds by default
maxTimeoutsBeforeClose = getIntSystemProperty("redis.maxTimeoutsBeforeClose", 0);// 0 by default, never close
}
private int timeoutCounter = 0;
protected final String queue;
protected final String shutdownKey;
protected final ScheduledItemExecutor executor = new ScheduledItemExecutor();
public RedisThread() {
this(AbstractScheduler.defaultQueue);
}
public RedisThread(String queue) {
this(null, queue);
}
public RedisThread(JedisPool pool, String queue) {
this(defaultQueuePrefix, pool, queue);
}
public RedisThread(String queuePrefix, JedisPool pool, String queue) {
super(queuePrefix, pool);
this.queue = this.queuePrefix + queue;
this.shutdownKey = this.queuePrefix + "shutdown";
}
protected String pollRedis(final Jedis jedis, final int timeout) {
if (debug) System.out.printf("redis> BRPOP %s %d\n", queue, timeout);
final List<String> items = jedis.brpop(timeout, queue);
//System.out.println("items: " + items);
return (items == null || items.size() < 2) ? null : items.get(1);
}
private static final ExecutionResult noop = new PrintStackTraceExecutionResult();
protected ExecutionResult getExecutionResult(final String scheduledItemString) {
return noop;
}
@Override
public final void run() {
Jedis jedis = null;
outer:
while (true)
try {
jedis = pool.getResource();
while (true) {
if (debug && maxTimeoutsBeforeClose > 0) System.out.printf("maxTimeoutsBeforeClose: %d timeoutCounter: %d\n", maxTimeoutsBeforeClose, timeoutCounter);
// check to see if we should shutdown
if ("shutdown".equals(jedis.get(this.shutdownKey)))
break outer;
// grab an item, if it's null (probably timed out) try again
final String scheduledItemString = pollRedis(jedis, defaultTimeout);
if (scheduledItemString == null) {
// timed out
if (maxTimeoutsBeforeClose > 0 && ++timeoutCounter >= maxTimeoutsBeforeClose)
break outer;
continue;
}
timeoutCounter = 0;
if (debug) System.out.println("scheduledItemString: " + scheduledItemString);
final ScheduledItem scheduledItem = om.readValue(scheduledItemString, ScheduledItem.class);
if (debug) System.out.println("scheduledItem object: " + scheduledItem);
executor.execute(scheduledItem, getExecutionResult(scheduledItemString));
}
} catch (Throwable e) {
e.printStackTrace();
} finally {
tryReturn(jedis);
}
this.close();
}
public final void tryReturn(final Jedis jedis) {
if (jedis != null)
try {
pool.returnResource(jedis);
} catch (Throwable e) {
e.printStackTrace();
}
}
@Override
public void close() {
super.close();
executor.close();
}
protected void deleteQueue(final String... queue) {
Jedis jedis = null;
try {
jedis = pool.getResource();
if (debug) System.out.printf("redis> DEL %s\n", Arrays.toString(queue));
jedis.del(queue);
} catch (Throwable e) {
e.printStackTrace();
} finally {
tryReturn(jedis);
}
}
/**
* Only meant to be used by testing frameworks like JUnit
*/
void deleteQueue() {
deleteQueue(queue);
}
public static void main(String[] args) {
// set all needed arguments with system properties
new RedisThread().run();
}
}

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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* Represents an Exception and a serialized ScheduledItem to put in the Redis error queue
*/
public class ScheduledItemError {
private final long date = System.currentTimeMillis();
private final String exception;
private final String scheduledItemString;
public ScheduledItemError(final Throwable e, final String scheduledItemString) {
this.scheduledItemString = scheduledItemString;
final StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
this.exception = sw.toString();
}
public long getDate() {
return date;
}
public String getException() {
return exception;
}
public String getScheduledItemString() {
return scheduledItemString;
}
@Override
public String toString() {
return "ScheduledItemError{" +
"date=" + date +
", exception='" + exception + '\'' +
", scheduledItemString='" + scheduledItemString + '\'' +
"} " + super.toString();
}
}

34
redisprocessor/src/test/java/com/moparisthebest/jbgjob/processor/RedisErrorQueueThreadTest.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import org.junit.BeforeClass;
public class RedisErrorQueueThreadTest extends RedisThreadTest {
@BeforeClass
public static void setUpRedisThread() throws Throwable {
System.setProperty("redis.maxTimeoutsBeforeClose", "1");
rt = new RedisErrorQueueThread();
rt.deleteQueue();
}
}

34
redisprocessor/src/test/java/com/moparisthebest/jbgjob/processor/RedisProcessingQueueThreadTest.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import org.junit.BeforeClass;
public class RedisProcessingQueueThreadTest extends RedisThreadTest {
@BeforeClass
public static void setUpRedisThread() throws Throwable {
System.setProperty("redis.maxTimeoutsBeforeClose", "1");
rt = new RedisProcessingQueueThread();
rt.deleteQueue();
}
}

49
redisprocessor/src/test/java/com/moparisthebest/jbgjob/processor/RedisThreadTest.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob.processor;
import com.moparisthebest.jbgjob.AbstractSchedulerTests;
import com.moparisthebest.jbgjob.RedisScheduler;
import org.junit.AfterClass;
import org.junit.BeforeClass;
public class RedisThreadTest extends AbstractSchedulerTests {
static RedisThread rt;
@BeforeClass
public static void setUpRedisThread() throws Throwable {
System.setProperty("redis.maxTimeoutsBeforeClose", "1");
rt = new RedisThread();
rt.deleteQueue();
}
@BeforeClass
public static void setUp() throws Throwable {
bg = new RedisScheduler();
}
@AfterClass
public static void testRunRedisThread() throws Throwable {
rt.run();
rt.deleteQueue();
}
}

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<?xml version="1.0" encoding="UTF-8"?>
<!--
~ jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
~ combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
~ Copyright (C) 2013 Travis Burtrum (moparisthebest)
~
~ This library is free software; you can redistribute it and/or
~ modify it under the terms of the GNU Lesser General Public
~ License as published by the Free Software Foundation; either
~ version 2.1 of the License, or (at your option) any later version.
~
~ This library is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
~ Lesser General Public License for more details.
~
~ You should have received a copy of the GNU Lesser General Public
~ License along with this library; if not, write to the Free Software
~ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>com.moparisthebest.jbgjob</groupId>
<artifactId>jbgjob</artifactId>
<version>0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>redisscheduler</artifactId>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>core</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.2.2</version>
</dependency>
</dependencies>
<profiles>
<profile>
<id>run-tests</id>
<activation>
<property>
<name>maven.test.skip</name>
<value>false</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>core</artifactId>
<version>${project.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
</profile>
</profiles>
</project>

86
redisscheduler/src/main/java/com/moparisthebest/jbgjob/RedisScheduler.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import com.fasterxml.jackson.databind.ObjectMapper;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
/**
* This implementation of Scheduler that serializes the DTO into a redis list for processing elsewhere.
*/
public class RedisScheduler extends AbstractScheduler {
public static final boolean debug = "true".equalsIgnoreCase(System.getProperty("redis.debug")); // print debug statements, for development only
public static final String defaultQueuePrefix;
static {
String prefix = System.getProperty("redis.queuePrefix");
if (prefix == null)
try {
prefix = java.net.InetAddress.getLocalHost().getHostName();
} catch (Throwable e) {
}
defaultQueuePrefix = (prefix == null || prefix.isEmpty()) ? "" : (prefix + "-");
}
protected final String queuePrefix;
protected final ObjectMapper om = new ObjectMapper().enableDefaultTyping();
protected final JedisPool pool;
public RedisScheduler() {
this(null);
}
public RedisScheduler(JedisPool pool) {
this(defaultQueuePrefix, pool);
}
public RedisScheduler(String queuePrefix, JedisPool pool) {
this.queuePrefix = queuePrefix;
this.pool = pool != null ? pool : new JedisPool(new JedisPoolConfig(), System.getProperty("redis.host", "localhost"));
}
@Override
public <T> boolean schedule(final String queue, final ScheduledItem<T> scheduledItem) {
super.schedule(queue, scheduledItem);
Jedis jedis = null;
try {
final String scheduledItemString = om.writeValueAsString(scheduledItem);
if (debug) System.out.printf("redis> LPUSH %s \"%s\"\n", queuePrefix + queue, scheduledItemString);
jedis = pool.getResource();
return jedis.lpush(queuePrefix + queue, scheduledItemString) > 0;
} catch (Throwable e) {
e.printStackTrace();
return false;
} finally {
if (jedis != null)
try {
pool.returnResource(jedis);
} catch (Throwable e) {
e.printStackTrace();
}
}
}
}

31
redisscheduler/src/test/java/com/moparisthebest/jbgjob/RedisSchedulerTest.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import org.junit.BeforeClass;
public class RedisSchedulerTest extends AbstractSchedulerTests {
@BeforeClass
public static void setUp() throws Throwable {
bg = new RedisScheduler();
}
}

58
threadscheduler/pom.xml Executable file
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<?xml version="1.0" encoding="UTF-8"?>
<!--
~ jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
~ combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
~ Copyright (C) 2013 Travis Burtrum (moparisthebest)
~
~ This library is free software; you can redistribute it and/or
~ modify it under the terms of the GNU Lesser General Public
~ License as published by the Free Software Foundation; either
~ version 2.1 of the License, or (at your option) any later version.
~
~ This library is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
~ Lesser General Public License for more details.
~
~ You should have received a copy of the GNU Lesser General Public
~ License along with this library; if not, write to the Free Software
~ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>com.moparisthebest.jbgjob</groupId>
<artifactId>jbgjob</artifactId>
<version>0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>threadscheduler</artifactId>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>core</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
<profiles>
<profile>
<id>run-tests</id>
<activation>
<property>
<name>maven.test.skip</name>
<value>false</value>
</property>
</activation>
<dependencies>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>core</artifactId>
<version>${project.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
</profile>
</profiles>
</project>

49
threadscheduler/src/main/java/com/moparisthebest/jbgjob/ThreadScheduler.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
/**
* This implementation of Scheduler has a thread pool with a configurable number of threads (default 5) with which to process the DTO inside this JVM.
* <p/>
* This implementation ignores 'queue', all Jobs are put in the same queue.
*/
public class ThreadScheduler extends AbstractScheduler {
private static final ScheduledItemExecutor executor = new ScheduledItemExecutor(false);
@Override
public <T> boolean schedule(final String queue, final ScheduledItem<T> scheduledItem) {
super.schedule(queue, scheduledItem);
try {
executor.execute(scheduledItem);
return true;
} catch (Throwable e) {
e.printStackTrace();
return false;
}
}
@Override
public void close() {
super.close();
executor.close();
}
}

31
threadscheduler/src/test/java/com/moparisthebest/jbgjob/ThreadSchedulerTest.java Normal file
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/*
* jBgJob (Java Background Job) lets you schedule Java jobs to be ran in the background. They can run in any
* combination of other threads in the same JVM, other JVMs, or multiple other JVMs, even on different machines.
* Copyright (C) 2013 Travis Burtrum (moparisthebest)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.moparisthebest.jbgjob;
import org.junit.BeforeClass;
public class ThreadSchedulerTest extends AbstractSchedulerTests {
@BeforeClass
public static void setUp() throws Throwable {
bg = new ThreadScheduler();
}
}