Add a test with a threaded TempFileCreationStrategy, remove duplicated constant.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1835182 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/util/DefaultTempFileCreationStrategy.java

@@ -21,6 +21,8 @@ import java.io.File;
 import java.io.IOException;
 import java.security.SecureRandom;
 
+import static org.apache.poi.util.TempFile.JAVA_IO_TMPDIR;
+
 /**
  * Default implementation of the {@link TempFileCreationStrategy} used by {@link TempFile}:
  * Files are collected into one directory and by default are deleted on exit from the VM.
@@ -34,9 +36,6 @@ import java.security.SecureRandom;
  * processes or limited temporary storage.
  */
 public class DefaultTempFileCreationStrategy implements TempFileCreationStrategy {
-    /** Define a constant for this property as it is sometimes mistypes as "tempdir" otherwise
-     * This is private to avoid having two public-visible constants ({@link TempFile#JAVA_IO_TMPDIR}). */
-    private static final String JAVA_IO_TMPDIR = TempFile.JAVA_IO_TMPDIR;
     /*package*/ static final String POIFILES = "poifiles";
     
     /** To keep files after JVM exit, set the <code>-Dpoi.keep.tmp.files</code> JVM property */

src/ooxml/testcases/org/apache/poi/util/TestTempFileThreaded.java

@@ -0,0 +1,188 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+package org.apache.poi.util;
+
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.xssf.streaming.SXSSFSheet;
+import org.apache.poi.xssf.streaming.SXSSFWorkbook;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+import static org.apache.poi.util.DefaultTempFileCreationStrategy.POIFILES;
+import static org.apache.poi.util.TempFile.JAVA_IO_TMPDIR;
+import static org.junit.Assert.assertEquals;
+
+public class TestTempFileThreaded {
+    private static final int NUMBER_OF_THREADS = 10;
+    private static final int NUMBER_OF_TESTS = 200;
+
+    private volatile Throwable exception;
+    private int executions[];
+
+    // the actual thread-safe temp-file strategy
+    private static TempFileCreationStrategy createTempFileCreationStrategy(File poiTempFileDirectory) {
+        return new TempFileCreationStrategy() {
+            @Override
+            public File createTempFile(String prefix, String suffix) throws IOException {
+                long threadId = Thread.currentThread().getId();
+                File threadDir = new File(poiTempFileDirectory, Long.toString(threadId));
+                if (!threadDir.exists()) {
+                    if (!threadDir.mkdirs()) {
+                        throw new IOException("mkdir of " + threadDir + " failed");
+                    }
+                }
+
+                File file = File.createTempFile(prefix, suffix, threadDir);
+                file.deleteOnExit();
+                return file;
+            }
+
+            @Override
+            public File createTempDirectory(String prefix) {
+                throw new UnsupportedOperationException("createTempDirectory");
+            }
+        };
+    }
+
+    @BeforeClass
+    public static void setUpClass() throws IOException {
+        String tmpDir = System.getProperty(JAVA_IO_TMPDIR);
+        if (tmpDir == null) {
+            throw new IOException("Systems temporary directory not defined - set the -D" + JAVA_IO_TMPDIR + " jvm property!");
+        }
+
+        TempFile.setTempFileCreationStrategy(createTempFileCreationStrategy(new File(new File(tmpDir, POIFILES), "TestTempFileThreaded")));
+    }
+
+    @Before
+    public void setUp() {
+        // Initialize array to allow to summarize afterwards
+        executions = new int[NUMBER_OF_THREADS];
+    }
+
+    @Test
+    public void runTest() throws Throwable {
+        List<Thread> threads = new LinkedList<>();
+
+        // start all threads
+        for (int i = 0; i < NUMBER_OF_THREADS; i++) {
+            Thread t = startThread(i, new TestRunnable());
+            threads.add(t);
+        }
+
+        // wait for all threads
+        for (int i = 0; i < NUMBER_OF_THREADS; i++) {
+            threads.get(i).join();
+        }
+
+        // report exceptions if there were any
+        if (exception != null) {
+            throw exception;
+        }
+
+        // make sure the resulting number of executions is correct
+        for (int i = 0; i < NUMBER_OF_THREADS; i++) {
+            // check if enough items were performed
+            assertEquals("Thread " + i
+                            + " did not execute all iterations", NUMBER_OF_TESTS,
+                    executions[i]);
+        }
+    }
+
+    private static class TestRunnable {
+        Map<Integer, List<File>> files = new HashMap<>();
+
+        public TestRunnable() {
+            for (int i = 0; i < NUMBER_OF_THREADS; i++) {
+                files.put(i, new ArrayList<>());
+            }
+        }
+
+        public void doEnd(int threadNum) {
+            for (File file : files.get(threadNum)) {
+                if (!file.exists()) {
+                    throw new IllegalStateException("File " + file + " does not exist");
+                }
+                if (!file.delete()) {
+                    throw new IllegalStateException("Deletion of " + file + " failed");
+                }
+            }
+        }
+
+        public void run(int threadNum, int iter) throws Exception {
+            try (SXSSFWorkbook wb = new SXSSFWorkbook()) {
+                SXSSFSheet sheet = wb.createSheet("test");
+
+                for (int i = 0; i < 100; i++) {
+                    Row row = sheet.createRow(i);
+                    for (int j = 0; j < 10; j++) {
+                        Cell cell = row.createCell(j);
+                        cell.setCellValue("123");
+                    }
+                }
+
+                File file = TempFile.createTempFile("TestTempFile-" + threadNum + "-" + iter + "-", ".xlsx");
+                try (OutputStream outputStream = new FileOutputStream(file)) {
+                    wb.write(outputStream);
+                }
+
+                files.get(threadNum).add(file);
+
+                if (iter % 30 == 0) {
+                    System.out.println("thread: " + threadNum + ", iter: " + iter + ": " + file);
+                }
+            }
+        }
+    }
+
+    private Thread startThread(final int threadNum, final TestRunnable run) {
+        Thread t1 = new Thread(() -> {
+            try {
+                for (int iter = 0; iter < NUMBER_OF_TESTS && exception == null; iter++) {
+                    // call the actual test-code
+                    run.run(threadNum, iter);
+
+                    executions[threadNum]++;
+                }
+
+                // do end-work here, we don't do this in a finally as we log
+                // Exception
+                // then anyway
+                run.doEnd(threadNum);
+            } catch (Throwable e) {
+                exception = e;
+            }
+
+        }, "ThreadTestHelper-Thread " + threadNum + ": " + run.getClass().getName());
+
+        t1.start();
+
+        return t1;
+    }
+}