org.hibernate.c3p0.internal.C3P0ConnectionProvider Maven / Gradle / Ivy
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Enables C3P0 with Hibernate connections in the GuicedPersistence provider
Requires JDK 8 and up
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.c3p0.internal;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import javax.sql.DataSource;
import com.mchange.v2.c3p0.DataSources;
import org.hibernate.HibernateException;
import org.hibernate.boot.registry.classloading.spi.ClassLoaderService;
import org.hibernate.boot.registry.classloading.spi.ClassLoadingException;
import org.hibernate.cfg.Environment;
import org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator;
import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
import org.hibernate.internal.util.config.ConfigurationHelper;
import org.hibernate.service.UnknownUnwrapTypeException;
import org.hibernate.service.spi.Configurable;
import org.hibernate.service.spi.ServiceRegistryAwareService;
import org.hibernate.service.spi.ServiceRegistryImplementor;
import org.hibernate.service.spi.Stoppable;
import org.jboss.logging.Logger;
/**
* A connection provider that uses a C3P0 connection pool. Hibernate will use this by
* default if the hibernate.c3p0.* properties are set.
*
* @author various people
* @see ConnectionProvider
*/
public class C3P0ConnectionProvider
implements ConnectionProvider, Configurable, Stoppable, ServiceRegistryAwareService {
private static final C3P0MessageLogger LOG = Logger.getMessageLogger(
C3P0MessageLogger.class,
C3P0ConnectionProvider.class.getName()
);
//swaldman 2006-08-28: define c3p0-style configuration parameters for properties with
// hibernate-specific overrides to detect and warn about conflicting
// declarations
private static final String C3P0_STYLE_MIN_POOL_SIZE = "c3p0.minPoolSize";
private static final String C3P0_STYLE_MAX_POOL_SIZE = "c3p0.maxPoolSize";
private static final String C3P0_STYLE_MAX_IDLE_TIME = "c3p0.maxIdleTime";
private static final String C3P0_STYLE_MAX_STATEMENTS = "c3p0.maxStatements";
private static final String C3P0_STYLE_ACQUIRE_INCREMENT = "c3p0.acquireIncrement";
private static final String C3P0_STYLE_IDLE_CONNECTION_TEST_PERIOD = "c3p0.idleConnectionTestPeriod";
//swaldman 2006-08-28: define c3p0-style configuration parameters for initialPoolSize, which
// hibernate sensibly lets default to minPoolSize, but we'll let users
// override it with the c3p0-style property if they want.
private static final String C3P0_STYLE_INITIAL_POOL_SIZE = "c3p0.initialPoolSize";
private DataSource ds;
private Integer isolation;
private boolean autocommit;
private ServiceRegistryImplementor serviceRegistry;
@Override
@SuppressWarnings("UnnecessaryUnboxing")
public Connection getConnection() throws SQLException {
final Connection c = ds.getConnection();
if ( isolation != null && !isolation.equals( c.getTransactionIsolation() ) ) {
c.setTransactionIsolation( isolation.intValue() );
}
if ( c.getAutoCommit() != autocommit ) {
c.setAutoCommit( autocommit );
}
return c;
}
@Override
public void closeConnection(Connection conn) throws SQLException {
conn.close();
}
@Override
public boolean isUnwrappableAs(Class unwrapType) {
return ConnectionProvider.class.equals( unwrapType ) ||
C3P0ConnectionProvider.class.isAssignableFrom( unwrapType ) ||
DataSource.class.isAssignableFrom( unwrapType );
}
@Override
@SuppressWarnings({"unchecked"})
public T unwrap(Class unwrapType) {
if ( ConnectionProvider.class.equals( unwrapType ) ||
C3P0ConnectionProvider.class.isAssignableFrom( unwrapType ) ) {
return (T) this;
}
else if ( DataSource.class.isAssignableFrom( unwrapType ) ) {
return (T) ds;
}
else {
throw new UnknownUnwrapTypeException( unwrapType );
}
}
@Override
@SuppressWarnings({"unchecked"})
public void configure(Map props) {
final String jdbcDriverClass = (String) props.get( Environment.DRIVER );
final String jdbcUrl = (String) props.get( Environment.URL );
final Properties connectionProps = ConnectionProviderInitiator.getConnectionProperties( props );
LOG.c3p0UsingDriver( jdbcDriverClass, jdbcUrl );
LOG.connectionProperties( ConfigurationHelper.maskOut( connectionProps, "password" ) );
autocommit = ConfigurationHelper.getBoolean( Environment.AUTOCOMMIT, props );
LOG.autoCommitMode( autocommit );
if ( jdbcDriverClass == null ) {
LOG.jdbcDriverNotSpecified( Environment.DRIVER );
}
else {
try {
serviceRegistry.getService( ClassLoaderService.class ).classForName( jdbcDriverClass );
}
catch (ClassLoadingException e) {
throw new ClassLoadingException( LOG.jdbcDriverNotFound( jdbcDriverClass ), e );
}
}
try {
//swaldman 2004-02-07: modify to allow null values to signify fall through to c3p0 PoolConfig defaults
final Integer minPoolSize = ConfigurationHelper.getInteger( Environment.C3P0_MIN_SIZE, props );
final Integer maxPoolSize = ConfigurationHelper.getInteger( Environment.C3P0_MAX_SIZE, props );
final Integer maxIdleTime = ConfigurationHelper.getInteger( Environment.C3P0_TIMEOUT, props );
final Integer maxStatements = ConfigurationHelper.getInteger( Environment.C3P0_MAX_STATEMENTS, props );
final Integer acquireIncrement = ConfigurationHelper.getInteger( Environment.C3P0_ACQUIRE_INCREMENT, props );
final Integer idleTestPeriod = ConfigurationHelper.getInteger( Environment.C3P0_IDLE_TEST_PERIOD, props );
final Properties c3props = new Properties();
// turn hibernate.c3p0.* into c3p0.*, so c3p0
// gets a chance to see all hibernate.c3p0.*
for ( Object o : props.keySet() ) {
if ( !String.class.isInstance( o ) ) {
continue;
}
final String key = (String) o;
if ( key.startsWith( "hibernate.c3p0." ) ) {
final String newKey = key.substring( 15 );
if ( props.containsKey( newKey ) ) {
warnPropertyConflict( key, newKey );
}
c3props.put( newKey, props.get( key ) );
}
}
setOverwriteProperty( Environment.C3P0_MIN_SIZE, C3P0_STYLE_MIN_POOL_SIZE, props, c3props, minPoolSize );
setOverwriteProperty( Environment.C3P0_MAX_SIZE, C3P0_STYLE_MAX_POOL_SIZE, props, c3props, maxPoolSize );
setOverwriteProperty( Environment.C3P0_TIMEOUT, C3P0_STYLE_MAX_IDLE_TIME, props, c3props, maxIdleTime );
setOverwriteProperty(
Environment.C3P0_MAX_STATEMENTS, C3P0_STYLE_MAX_STATEMENTS, props, c3props, maxStatements
);
setOverwriteProperty(
Environment.C3P0_ACQUIRE_INCREMENT, C3P0_STYLE_ACQUIRE_INCREMENT, props, c3props, acquireIncrement
);
setOverwriteProperty(
Environment.C3P0_IDLE_TEST_PERIOD,
C3P0_STYLE_IDLE_CONNECTION_TEST_PERIOD,
props,
c3props,
idleTestPeriod
);
// revert to traditional hibernate behavior of setting initialPoolSize to minPoolSize
// unless otherwise specified with a c3p0.*-style parameter.
final Integer initialPoolSize = ConfigurationHelper.getInteger( C3P0_STYLE_INITIAL_POOL_SIZE, props );
if ( initialPoolSize == null ) {
setOverwriteProperty( "", C3P0_STYLE_INITIAL_POOL_SIZE, props, c3props, minPoolSize );
}
final DataSource unpooled = DataSources.unpooledDataSource( jdbcUrl, connectionProps );
final Map allProps = new HashMap();
allProps.putAll( props );
allProps.putAll( c3props );
ds = DataSources.pooledDataSource( unpooled, allProps );
}
catch (Exception e) {
LOG.error( LOG.unableToInstantiateC3p0ConnectionPool(), e );
throw new HibernateException( LOG.unableToInstantiateC3p0ConnectionPool(), e );
}
isolation = ConnectionProviderInitiator.extractIsolation( props );
LOG.jdbcIsolationLevel( ConnectionProviderInitiator.toIsolationNiceName( isolation ) );
}
@Override
public boolean supportsAggressiveRelease() {
return false;
}
private void setOverwriteProperty(
String hibernateStyleKey,
String c3p0StyleKey,
Map hibp,
Properties c3p,
Integer value) {
if ( value != null ) {
final String peeledC3p0Key = c3p0StyleKey.substring( 5 );
c3p.put( peeledC3p0Key, String.valueOf( value ).trim() );
if ( hibp.containsKey( c3p0StyleKey ) ) {
warnPropertyConflict( hibernateStyleKey, c3p0StyleKey );
}
final String longC3p0StyleKey = "hibernate." + c3p0StyleKey;
if ( hibp.containsKey( longC3p0StyleKey ) ) {
warnPropertyConflict( hibernateStyleKey, longC3p0StyleKey );
}
}
}
private void warnPropertyConflict(String hibernateStyle, String c3p0Style) {
LOG.bothHibernateAndC3p0StylesSet( hibernateStyle, c3p0Style );
}
@Override
public void stop() {
try {
DataSources.destroy( ds );
}
catch (SQLException sqle) {
LOG.unableToDestroyC3p0ConnectionPool( sqle );
}
}
/**
* Close the provider.
*
* @deprecated Use {@link #stop} instead
*/
@SuppressWarnings("UnusedDeclaration")
@Deprecated
public void close() {
stop();
}
@Override
public void injectServices(ServiceRegistryImplementor serviceRegistry) {
this.serviceRegistry = serviceRegistry;
}
}