First go at QueryRunner and Factory<Connection> arg for QueryMapper

This commit is contained in:
Travis Burtrum 2017-07-01 02:07:04 -04:00
parent 09c114e106
commit a22109f31c
10 changed files with 348 additions and 50 deletions

View File

@ -0,0 +1,10 @@
package com.moparisthebest.jdbc;
import java.sql.SQLException;
/**
* Created by mopar on 7/1/17.
*/
public interface Factory<T> {
T create() throws SQLException;
}

View File

@ -0,0 +1,73 @@
package com.moparisthebest.jdbc;
import com.moparisthebest.jdbc.codegen.JdbcMapper;
import java.sql.SQLException;
import static com.moparisthebest.jdbc.TryClose.tryClose;
/**
* Created by mopar on 6/30/17.
*/
public class QueryRunner<T extends JdbcMapper> {
private final Factory<T> factory;
public QueryRunner(final Factory<T> factory) {
if(factory == null)
throw new NullPointerException("factory must be non-null");
this.factory = factory;
}
public <E> E run(final Runner<T, E> query) throws SQLException {
if(query == null)
throw new NullPointerException("query must be non-null");
T dao = null;
try {
dao = factory.create();
return query.run(dao);
} finally {
tryClose(dao);
}
}
public <E> E runInTransaction(final Runner<T, E> query) throws SQLException {
if(query == null)
throw new NullPointerException("query must be non-null");
T dao = null;
try {
dao = factory.create();
dao.getConnection().setAutoCommit(false);
final E ret = query.run(dao);
dao.getConnection().commit();
return ret;
} catch (final Throwable e) {
if (dao != null) {
try {
dao.getConnection().rollback();
} catch(SQLException excep) {
// ignore to throw original
}
}
if(e instanceof SQLException)
throw (SQLException) e;
if(e instanceof RuntimeException)
throw (RuntimeException) e;
throw new RuntimeException("odd error should never happen", e);
} finally {
if (dao != null) {
try {
dao.getConnection().setAutoCommit(true);
} catch(SQLException excep) {
// ignore
}
tryClose(dao);
}
}
}
public static interface Runner<T, E> {
E run(T dao) throws SQLException;
}
}

View File

@ -1,24 +1,107 @@
package com.moparisthebest.jdbc.codegen;
import com.moparisthebest.jdbc.Factory;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.sql.Connection;
import java.sql.SQLException;
/**
* Created by mopar on 5/24/17.
*/
public abstract class JdbcMapperFactory {
public class JdbcMapperFactory<T> implements Factory<T> {
static final String SUFFIX = "Bean";
@SuppressWarnings("unchecked")
public static <T> Class<? extends T> getImplementationClass(final Class<T> jdbcMapper) throws ClassNotFoundException {
return (Class<? extends T>) Class.forName(jdbcMapper.getName() + SUFFIX);
}
public static <T> Constructor<? extends T> getConnectionConstructor(final Class<T> jdbcMapper) throws ClassNotFoundException, NoSuchMethodException {
return getImplementationClass(jdbcMapper).getConstructor(Connection.class);
}
public static <T> Constructor<? extends T> getDefaultConstructor(final Class<T> jdbcMapper) throws ClassNotFoundException, NoSuchMethodException {
return getImplementationClass(jdbcMapper).getConstructor();
}
public static <T> Constructor<? extends T> getFactoryConstructor(final Class<T> jdbcMapper) throws ClassNotFoundException, NoSuchMethodException {
return getImplementationClass(jdbcMapper).getConstructor(Factory.class);
}
public static <T> T create(final Class<T> jdbcMapper, final Connection connection) {
try {
return (T) Class.forName(jdbcMapper.getName() + SUFFIX).getConstructor(Connection.class).newInstance(connection);
return getConnectionConstructor(jdbcMapper).newInstance(connection);
} catch (Throwable e) {
throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
}
}
public static <T> T create(final Class<T> jdbcMapper) {
return create(jdbcMapper, null);
try {
return getDefaultConstructor(jdbcMapper).newInstance();
} catch (Throwable e) {
throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
}
}
private final Constructor<? extends T> constructor;
private final Object[] args;
public JdbcMapperFactory(final Class<T> jdbcMapper) {
try {
this.constructor = getDefaultConstructor(jdbcMapper);
this.args = null;
} catch (Throwable e) {
throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
}
}
public JdbcMapperFactory(final Constructor<? extends T> constructor, final Object... args) {
if(constructor == null)
throw new NullPointerException("constructor must be non-null");
this.constructor = constructor;
this.args = args;
}
public JdbcMapperFactory(final Class<T> queryMapperClass, final Factory<Connection> connectionFactory) {
if(queryMapperClass == null)
throw new NullPointerException("queryMapperClass must be non-null");
if(connectionFactory == null)
throw new NullPointerException("connectionFactory must be non-null");
try {
this.constructor = queryMapperClass.getConstructor(Factory.class);
} catch (NoSuchMethodException e) {
throw new RuntimeException("queryMapperClass must have a constructor that takes Factory<Connection>", e);
}
this.args = new Object[]{connectionFactory};
}
public JdbcMapperFactory(final Class<T> queryMapperClass, final String jndiName) {
if(queryMapperClass == null)
throw new NullPointerException("queryMapperClass must be non-null");
if(jndiName == null)
throw new NullPointerException("jndiName must be non-null");
try {
this.constructor = queryMapperClass.getConstructor(String.class);
} catch (NoSuchMethodException e) {
throw new RuntimeException("queryMapperClass must have a constructor that takes String", e);
}
this.args = new Object[]{jndiName};
}
@Override
public T create() throws SQLException {
try {
return this.constructor.newInstance(args);
} catch (InstantiationException e) {
throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
} catch (IllegalAccessException e) {
throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
} catch (InvocationTargetException e) {
throw new RuntimeException("could not create JdbcMapper, did the processor run at compile time?", e);
}
}
}

View File

@ -22,7 +22,7 @@ import java.time.*;
* Created by mopar on 5/24/17.
*/
@JdbcMapper.Mapper(
// jndiName = "bob",
jndiName = "bob",
// databaseType = JdbcMapper.DatabaseType.ORACLE
cachePreparedStatements = JdbcMapper.OptionalBool.FALSE
// , sqlParser = SimpleSQLParser.class

View File

@ -22,8 +22,8 @@ public class CachingQueryMapper extends QueryMapper {
protected final Map<String, PreparedStatement> cache;
protected CachingQueryMapper(Connection conn, String jndiName, ResultSetMapper cm, final int maxEntries) {
super(conn, jndiName, cm);
protected CachingQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, ResultSetMapper cm, final int maxEntries) {
super(conn, jndiName, factory, cm);
if (maxEntries > 0) { // we want a limited cache
final float loadFactor = 0.75f; // default for HashMaps
// if we set the initialCapacity this way, nothing should ever need re-sized
@ -43,40 +43,56 @@ public class CachingQueryMapper extends QueryMapper {
cache = new HashMap<String, PreparedStatement>();
}
protected CachingQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, ResultSetMapper cm) {
this(conn, jndiName, factory, cm, 20); // default size of 20
}
public CachingQueryMapper(Connection conn, ResultSetMapper cm, final int maxEntries) {
this(conn, null, cm, maxEntries);
this(conn, null, null, cm, maxEntries);
}
public CachingQueryMapper(Connection conn, final int maxEntries) {
this(conn, null, null, maxEntries);
this(conn, null, null, null, maxEntries);
}
public CachingQueryMapper(String jndiName, ResultSetMapper cm, final int maxEntries) {
this(null, jndiName, cm, maxEntries);
this(null, jndiName, null, cm, maxEntries);
}
public CachingQueryMapper(String jndiName, final int maxEntries) {
this(null, jndiName, null, maxEntries);
this(null, jndiName, null, null, maxEntries);
}
protected CachingQueryMapper(Connection conn, String jndiName, ResultSetMapper cm) {
this(conn, jndiName, cm, 20); // default size of 20
public CachingQueryMapper(Factory<Connection> factory, ResultSetMapper cm, final int maxEntries) {
this(null, null, factory, cm, maxEntries);
}
public CachingQueryMapper(Factory<Connection> factory, final int maxEntries) {
this(null, null, factory, null, maxEntries);
}
public CachingQueryMapper(Connection conn, ResultSetMapper cm) {
this(conn, null, cm);
this(conn, null, null, cm);
}
public CachingQueryMapper(Connection conn) {
this(conn, null, null);
this(conn, null, null, null);
}
public CachingQueryMapper(String jndiName, ResultSetMapper cm) {
this(null, jndiName, cm);
this(null, jndiName, null, cm);
}
public CachingQueryMapper(String jndiName) {
this(null, jndiName, null);
this(null, jndiName, null, null);
}
public CachingQueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
this(null, null, factory, cm);
}
public CachingQueryMapper(Factory<Connection> factory) {
this(null, null, factory, null);
}
protected PreparedStatement getPreparedStatement(String sql) throws SQLException {

View File

@ -34,26 +34,26 @@ public class ListQueryMapper extends QueryMapper {
public static final String inListReplace = "{inList}";
private ListQueryMapper(Connection conn, String jndiName, QueryMapper delegate, ResultSetMapper cm, InList inList) {
private ListQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, QueryMapper delegate, ResultSetMapper cm, InList inList) {
this.inList = inList;
this.delegate = delegate == null ? new QueryMapper(conn, jndiName, cm) :
this.delegate = delegate == null ? new QueryMapper(conn, jndiName, factory, cm) :
(delegate instanceof ListQueryMapper ? ((ListQueryMapper)delegate).delegate : delegate);
}
public ListQueryMapper(QueryMapper delegate, InList inList) {
this(null, null, delegate, null, inList);
this(null, null, null, delegate, null, inList);
}
public ListQueryMapper(QueryMapper delegate) {
this(null, null, delegate, null, defaultInList);
this(null, null, null, delegate, null, defaultInList);
}
public ListQueryMapper(Connection conn, InList inList) {
this(conn, null, null, null, inList);
this(conn, null, null, null, null, inList);
}
public ListQueryMapper(Connection conn, ResultSetMapper cm, InList inList) {
this(conn, null, null, cm, inList);
this(conn, null, null, null, cm, inList);
}
public ListQueryMapper(Connection conn) {
@ -65,11 +65,11 @@ public class ListQueryMapper extends QueryMapper {
}
public ListQueryMapper(String jndiName, InList inList) {
this(null, jndiName, null, null, inList);
this(null, jndiName, null, null, null, inList);
}
public ListQueryMapper(String jndiName, ResultSetMapper cm, InList inList) {
this(null, jndiName, null, cm, inList);
this(null, jndiName, null, null, cm, inList);
}
public ListQueryMapper(String jndiName) {
@ -80,6 +80,23 @@ public class ListQueryMapper extends QueryMapper {
this(jndiName, cm, defaultInList);
}
public ListQueryMapper(Factory<Connection> factory, InList inList) {
this(null, null, factory, null, null, inList);
}
public ListQueryMapper(Factory<Connection> factory, ResultSetMapper cm, InList inList) {
this(null, null, factory, null, cm, inList);
}
public ListQueryMapper(Factory<Connection> factory) {
this(factory, defaultInList);
}
public ListQueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
this(factory, cm, defaultInList);
}
// todo: get rid of wrap, cause, how do you know to close it or not? :'(
public static ListQueryMapper wrap(final QueryMapper qm){
return qm instanceof ListQueryMapper ? (ListQueryMapper)qm : new ListQueryMapper(qm);
}

View File

@ -16,25 +16,25 @@ public class NullQueryMapper extends QueryMapper {
protected final boolean verbose;
protected final QueryMapper delegate;
private NullQueryMapper(Connection conn, String jndiName, QueryMapper delegate, ResultSetMapper cm, boolean verbose) {
private NullQueryMapper(Connection conn, String jndiName, Factory<Connection> factory, QueryMapper delegate, ResultSetMapper cm, boolean verbose) {
this.verbose = verbose;
this.delegate = delegate == null ? new QueryMapper(conn, jndiName, cm) : delegate;
this.delegate = delegate == null ? new QueryMapper(conn, jndiName, factory, cm) : delegate;
}
public NullQueryMapper(QueryMapper delegate, boolean verbose) {
this(null, null, delegate, null, verbose);
this(null, null, null, delegate, null, verbose);
}
public NullQueryMapper(QueryMapper delegate) {
this(null, null, delegate, null, true);
this(null, null, null, delegate, null, true);
}
public NullQueryMapper(Connection conn, boolean verbose) {
this(conn, null, null, null, verbose);
this(conn, null, null, null, null, verbose);
}
public NullQueryMapper(Connection conn, ResultSetMapper cm, boolean verbose) {
this(conn, null, null, cm, verbose);
this(conn, null, null, null, cm, verbose);
}
public NullQueryMapper(Connection conn) {
@ -46,11 +46,11 @@ public class NullQueryMapper extends QueryMapper {
}
public NullQueryMapper(String jndiName, boolean verbose) {
this(null, jndiName, null, null, verbose);
this(null, jndiName, null, null, null, verbose);
}
public NullQueryMapper(String jndiName, ResultSetMapper cm, boolean verbose) {
this(null, jndiName, null, cm, verbose);
this(null, jndiName, null, null, cm, verbose);
}
public NullQueryMapper(String jndiName) {
@ -61,6 +61,23 @@ public class NullQueryMapper extends QueryMapper {
this(jndiName, cm, true);
}
public NullQueryMapper(Factory<Connection> factory, boolean verbose) {
this(null, null, factory, null, null, verbose);
}
public NullQueryMapper(Factory<Connection> factory, ResultSetMapper cm, boolean verbose) {
this(null, null, factory, null, cm, verbose);
}
public NullQueryMapper(Factory<Connection> factory) {
this(factory, true);
}
public NullQueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
this(factory, cm, true);
}
// todo: remove this refer to ListQueryMapper for why
public static NullQueryMapper wrap(final QueryMapper qm){
return qm instanceof NullQueryMapper ? (NullQueryMapper)qm : new NullQueryMapper(qm);
}

View File

@ -36,29 +36,40 @@ public class QueryMapper implements JdbcMapper {
protected final ResultSetMapper cm;
protected final Connection conn;
protected final Context context;
protected final boolean closeConn;
protected QueryMapper(Connection conn, String jndiName, ResultSetMapper cm) {
protected QueryMapper(Connection conn, final String jndiName, final Factory<Connection> factory, final ResultSetMapper cm) {
this.cm = cm == null ? defaultRsm : cm;
boolean closeConn = false;
Context context = null;
if (conn == null && jndiName != null)
try {
context = new InitialContext();
DataSource ds = (DataSource) context.lookup(jndiName);
conn = ds.getConnection();
} catch (Throwable e) {
e.printStackTrace();
tryClose(conn);
} finally {
tryClose(context);
}
if(conn == null) {
if (factory != null) {
try {
conn = factory.create();
closeConn = true;
} catch (SQLException e) {
throw new RuntimeException("factory failed to create connection", e);
}
} else if (jndiName != null)
try {
context = new InitialContext();
DataSource ds = (DataSource) context.lookup(jndiName);
conn = ds.getConnection();
closeConn = true;
} catch (Throwable e) {
tryClose(context);
throw new RuntimeException("JNDI lookup failed to create connection", e);
}
}
if (conn == null)
throw new NullPointerException("Connection needs to be non-null for QueryMapper...");
this.conn = conn;
this.context = context;
if (this.conn == null)
throw new NullPointerException("Connection needs to be non-null for QueryMapper...");
this.closeConn = closeConn;
}
public QueryMapper(Connection conn, ResultSetMapper cm) {
this(conn, null, cm);
this(conn, null, null, cm);
}
public QueryMapper(Connection conn) {
@ -66,13 +77,21 @@ public class QueryMapper implements JdbcMapper {
}
public QueryMapper(String jndiName, ResultSetMapper cm) {
this(null, jndiName, cm);
this(null, jndiName, null, cm);
}
public QueryMapper(String jndiName) {
this(jndiName, null);
}
public QueryMapper(Factory<Connection> factory, ResultSetMapper cm) {
this(null, null, factory, cm);
}
public QueryMapper(Factory<Connection> factory) {
this(factory, null);
}
/**
* Only meant to be called by implementing classes
*/
@ -80,11 +99,12 @@ public class QueryMapper implements JdbcMapper {
this.cm = null;
this.conn = null;
this.context = null;
this.closeConn = false;
}
@Override
public void close() {
if (context != null) {
if (closeConn) {
tryClose(conn);
tryClose(context);
}

View File

@ -108,7 +108,7 @@ public class QueryMapperTest {
}
}
public static Connection getConnection() throws Throwable {
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection("jdbc:derby:memory:derbyDB;create=true");
}

View File

@ -0,0 +1,62 @@
package com.moparisthebest.jdbc;
import com.moparisthebest.jdbc.codegen.JdbcMapperFactory;
import com.moparisthebest.jdbc.dto.Person;
import org.junit.Assert;
import org.junit.Test;
import java.sql.Connection;
import java.sql.SQLException;
import static com.moparisthebest.jdbc.QueryMapperTest.*;
/**
* Created by mopar on 7/1/17.
*/
public class QueryRunnerTest {
public static final QueryRunner<QueryMapper> qr = new QueryRunner<QueryMapper>(new JdbcMapperFactory<QueryMapper>(QueryMapper.class, new Factory<Connection>() {
@Override
public Connection create() throws SQLException {
return QueryMapperTest.getConnection();
}
}));
private void testPerson(final Person expected, final String query) throws Throwable {
final Person actual = qr.runInTransaction(new QueryRunner.Runner<QueryMapper, Person>() {
@Override
public Person run(final QueryMapper qm) throws SQLException {
return qm.toObject(query, expected.getClass(), expected.getPersonNo());
}
});
/*
System.out.println("expected: " + expected);
System.out.println("actual: " + actual);
*/
Assert.assertEquals(expected, actual);
}
@Test
public void testFieldRegularPerson() throws Throwable {
testPerson(fieldPerson1, personRegular);
}
@Test
public void testFieldRegularAndUnderscore() throws Throwable {
testPerson(fieldBoss1, bossRegularAndUnderscore);
}
@Test
public void testFieldRegularAndUnderscoreReverse() throws Throwable {
testPerson(fieldBoss1, bossRegularAndUnderscoreReverse);
}
@Test
public void testFieldRegular() throws Throwable {
testPerson(fieldBoss2, bossRegular);
}
@Test
public void testFieldUnderscore() throws Throwable {
testPerson(fieldBoss3, bossUnderscore);
}
}