HHH-8453 - Investigate improving DriverManager-based connection pooling
This commit is contained in:
Steve Ebersole
parent
e269739993
commit
9671a4a727
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@ -27,26 +27,28 @@ import java.sql.Connection;
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import java.sql.Driver;
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import java.sql.DriverManager;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.Map;
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import java.util.Properties;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.TimeUnit;
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import org.hibernate.HibernateException;
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import org.hibernate.boot.registry.classloading.spi.ClassLoaderService;
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import org.hibernate.boot.registry.classloading.spi.ClassLoadingException;
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import org.hibernate.cfg.AvailableSettings;
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import org.hibernate.cfg.Environment;
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import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
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import org.hibernate.internal.CoreLogging;
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import org.hibernate.internal.CoreMessageLogger;
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import org.hibernate.internal.util.ReflectHelper;
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import org.hibernate.internal.util.config.ConfigurationHelper;
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import org.hibernate.service.UnknownUnwrapTypeException;
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import org.hibernate.service.spi.Configurable;
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import org.hibernate.service.spi.ServiceException;
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import org.hibernate.service.spi.ServiceRegistryAwareService;
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import org.hibernate.service.spi.ServiceRegistryImplementor;
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import org.hibernate.service.spi.Stoppable;
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import org.jboss.logging.Logger;
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/**
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* A connection provider that uses the {@link java.sql.DriverManager} directly to open connections and provides
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@ -59,23 +61,165 @@ import org.jboss.logging.Logger;
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*/
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public class DriverManagerConnectionProviderImpl
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implements ConnectionProvider, Configurable, Stoppable, ServiceRegistryAwareService {
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private static final CoreMessageLogger LOG = Logger.getMessageLogger( CoreMessageLogger.class, DriverManagerConnectionProviderImpl.class.getName() );
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private String url;
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private Properties connectionProps;
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private Integer isolation;
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private int poolSize;
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private boolean autocommit;
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private static final CoreMessageLogger log = CoreLogging.messageLogger( DriverManagerConnectionProviderImpl.class );
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//Access guarded by synchronization on the pool instance
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private final ArrayList<Connection> pool = new ArrayList<Connection>();
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private final AtomicInteger checkedOut = new AtomicInteger();
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// in TimeUnit.SECONDS
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public static final String VALIDATION_INTERVAL = "hibernate.connection.pool_validation_interval";
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private boolean stopped;
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private boolean active = true;
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private ConcurrentLinkedQueue<Connection> connections = new ConcurrentLinkedQueue<Connection>();
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private ConnectionCreator connectionCreator;
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private ScheduledExecutorService executorService;
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// create the pool ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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private transient ServiceRegistryImplementor serviceRegistry;
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private Driver driver;
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@Override
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public void injectServices(ServiceRegistryImplementor serviceRegistry) {
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this.serviceRegistry = serviceRegistry;
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}
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@Override
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public void configure(Map configurationValues) {
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log.usingHibernateBuiltInConnectionPool();
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connectionCreator = buildCreator( configurationValues );
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// todo : consider adding a min-pool-size option too
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final int maxSize = ConfigurationHelper.getInt( AvailableSettings.POOL_SIZE, configurationValues, 20 );
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final long validationInterval = ConfigurationHelper.getLong( VALIDATION_INTERVAL, configurationValues, 30 );
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log.hibernateConnectionPoolSize( maxSize );
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executorService = Executors.newSingleThreadScheduledExecutor();
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executorService.scheduleWithFixedDelay(
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new Runnable() {
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@Override
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public void run() {
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int size = connections.size();
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if ( size > maxSize ) {
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int sizeToBeRemoved = size - maxSize;
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for ( int i = 0; i < sizeToBeRemoved; i++ ) {
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connections.poll();
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}
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}
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}
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},
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validationInterval,
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validationInterval,
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TimeUnit.SECONDS
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);
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}
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private ConnectionCreator buildCreator(Map configurationValues) {
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final ConnectionCreatorBuilder connectionCreatorBuilder = new ConnectionCreatorBuilder();
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final String driverClassName = (String) configurationValues.get( AvailableSettings.DRIVER );
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connectionCreatorBuilder.setDriver( loadDriverIfPossible( driverClassName ) );
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final String url = (String) configurationValues.get( AvailableSettings.URL );
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if ( url == null ) {
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final String msg = log.jdbcUrlNotSpecified( AvailableSettings.URL );
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log.error( msg );
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throw new HibernateException( msg );
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}
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connectionCreatorBuilder.setUrl( url );
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log.usingDriver( driverClassName, url );
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final Properties connectionProps = ConnectionProviderInitiator.getConnectionProperties( configurationValues );
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// if debug level is enabled, then log the password, otherwise mask it
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if ( log.isDebugEnabled() ) {
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log.connectionProperties( connectionProps );
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}
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else {
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log.connectionProperties( ConfigurationHelper.maskOut( connectionProps, "password" ) );
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}
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connectionCreatorBuilder.setConnectionProps( connectionProps );
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final Boolean autoCommit = ConfigurationHelper.getBooleanWrapper( AvailableSettings.AUTOCOMMIT, configurationValues, null );
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if ( autoCommit != null ) {
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log.autoCommitMode( autoCommit );
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}
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connectionCreatorBuilder.setAutoCommit( autoCommit );
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final Integer isolation = ConfigurationHelper.getInteger( AvailableSettings.ISOLATION, configurationValues );
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if ( isolation != null ) {
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log.jdbcIsolationLevel( Environment.isolationLevelToString( isolation ) );
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}
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connectionCreatorBuilder.setIsolation( isolation );
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return connectionCreatorBuilder.build();
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}
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private Driver loadDriverIfPossible(String driverClassName) {
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if ( driverClassName == null ) {
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log.debug( "No driver class specified" );
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return null;
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}
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if ( serviceRegistry != null ) {
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final ClassLoaderService classLoaderService = serviceRegistry.getService( ClassLoaderService.class );
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final Class<Driver> driverClass = classLoaderService.classForName( driverClassName );
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try {
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return driverClass.newInstance();
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}
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catch ( Exception e ) {
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throw new ServiceException( "Specified JDBC Driver " + driverClassName + " could not be loaded", e );
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}
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}
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try {
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return (Driver) Class.forName( driverClassName ).newInstance();
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}
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catch ( Exception e1 ) {
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try{
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return (Driver) ReflectHelper.classForName( driverClassName ).newInstance();
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}
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catch ( Exception e2 ) {
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throw new ServiceException( "Specified JDBC Driver " + driverClassName + " could not be loaded", e2 );
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}
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}
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}
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// use the pool ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@Override
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public Connection getConnection() throws SQLException {
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if ( !active ) {
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throw new HibernateException( "Connection pool is no longer active" );
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}
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Connection connection;
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if ( (connection = connections.poll()) == null ) {
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connection = connectionCreator.createConnection();
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}
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return connection;
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}
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@Override
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public void closeConnection(Connection conn) throws SQLException {
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if (conn == null) {
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return;
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}
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this.connections.offer( conn );
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}
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@Override
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public boolean supportsAggressiveRelease() {
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return false;
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}
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@Override
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public boolean isUnwrappableAs(Class unwrapType) {
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@ -95,188 +239,163 @@ public class DriverManagerConnectionProviderImpl
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}
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}
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@Override
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public void configure(Map configurationValues) {
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LOG.usingHibernateBuiltInConnectionPool();
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final String driverClassName = (String) configurationValues.get( AvailableSettings.DRIVER );
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if ( driverClassName == null ) {
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LOG.jdbcDriverNotSpecified( AvailableSettings.DRIVER );
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}
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else if ( serviceRegistry != null ) {
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try {
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driver = (Driver) serviceRegistry.getService(
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ClassLoaderService.class ).classForName( driverClassName )
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.newInstance();
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}
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catch ( Exception e ) {
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throw new ClassLoadingException(
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"Specified JDBC Driver " + driverClassName
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+ " could not be loaded", e
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);
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}
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}
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// guard dog, mostly for making test pass
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else {
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try {
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// trying via forName() first to be as close to DriverManager's semantics
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driver = (Driver) Class.forName( driverClassName ).newInstance();
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}
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catch ( Exception e1 ) {
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try{
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driver = (Driver) ReflectHelper.classForName( driverClassName ).newInstance();
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}
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catch ( Exception e2 ) {
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throw new HibernateException( "Specified JDBC Driver " + driverClassName + " could not be loaded", e2 );
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}
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}
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}
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// default pool size 20
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poolSize = ConfigurationHelper.getInt( AvailableSettings.POOL_SIZE, configurationValues, 20 );
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LOG.hibernateConnectionPoolSize( poolSize );
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autocommit = ConfigurationHelper.getBoolean( AvailableSettings.AUTOCOMMIT, configurationValues );
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LOG.autoCommitMode( autocommit );
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isolation = ConfigurationHelper.getInteger( AvailableSettings.ISOLATION, configurationValues );
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if ( isolation != null ) {
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LOG.jdbcIsolationLevel( Environment.isolationLevelToString( isolation ) );
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}
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url = (String) configurationValues.get( AvailableSettings.URL );
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if ( url == null ) {
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final String msg = LOG.jdbcUrlNotSpecified( AvailableSettings.URL );
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LOG.error( msg );
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throw new HibernateException( msg );
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}
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connectionProps = ConnectionProviderInitiator.getConnectionProperties( configurationValues );
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LOG.usingDriver( driverClassName, url );
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// if debug level is enabled, then log the password, otherwise mask it
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if ( LOG.isDebugEnabled() ) {
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LOG.connectionProperties( connectionProps );
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}
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else {
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LOG.connectionProperties( ConfigurationHelper.maskOut( connectionProps, "password" ) );
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}
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}
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// destroy the pool ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@Override
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public void stop() {
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LOG.cleaningUpConnectionPool( url );
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if ( !active ) {
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return;
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}
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synchronized ( pool ) {
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for ( Connection connection : pool ) {
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log.cleaningUpConnectionPool( connectionCreator.getUrl() );
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active = false;
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if ( executorService != null ) {
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executorService.shutdown();
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}
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executorService = null;
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for ( Connection connection : connections ) {
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try {
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connection.close();
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}
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catch (SQLException sqle) {
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LOG.unableToClosePooledConnection( sqle );
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catch (SQLException e) {
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log.unableToClosePooledConnection( e );
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}
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}
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pool.clear();
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}
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stopped = true;
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}
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@Override
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public Connection getConnection() throws SQLException {
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final boolean traceEnabled = LOG.isTraceEnabled();
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if ( traceEnabled ) {
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LOG.tracev( "Total checked-out connections: {0}", checkedOut.intValue() );
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}
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// essentially, if we have available connections in the pool, use one...
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synchronized (pool) {
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if ( !pool.isEmpty() ) {
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final int last = pool.size() - 1;
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if ( traceEnabled ) {
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LOG.tracev( "Using pooled JDBC connection, pool size: {0}", last );
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}
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final Connection pooled = pool.remove( last );
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if ( isolation != null ) {
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pooled.setTransactionIsolation( isolation );
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}
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if ( pooled.getAutoCommit() != autocommit ) {
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pooled.setAutoCommit( autocommit );
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}
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checkedOut.incrementAndGet();
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return pooled;
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}
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}
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// otherwise we open a new connection...
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final boolean debugEnabled = LOG.isDebugEnabled();
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if ( debugEnabled ) {
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LOG.debug( "Opening new JDBC connection" );
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}
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final Connection conn;
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if ( driver != null ) {
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// If a Driver is available, completely circumvent
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// DriverManager#getConnection. It attempts to double check
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// ClassLoaders before using a Driver. This does not work well in
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// OSGi environments without wonky workarounds.
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conn = driver.connect( url, connectionProps );
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}
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else {
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// If no Driver, fall back on the original method.
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conn = DriverManager.getConnection( url, connectionProps );
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}
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if ( isolation != null ) {
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conn.setTransactionIsolation( isolation );
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}
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if ( conn.getAutoCommit() != autocommit ) {
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conn.setAutoCommit( autocommit );
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}
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if ( debugEnabled ) {
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LOG.debugf( "Created connection to: %s, Isolation Level: %s", url, conn.getTransactionIsolation() );
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}
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checkedOut.incrementAndGet();
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return conn;
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}
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@Override
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public void closeConnection(Connection conn) throws SQLException {
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checkedOut.decrementAndGet();
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final boolean traceEnabled = LOG.isTraceEnabled();
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// add to the pool if the max size is not yet reached.
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synchronized ( pool ) {
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final int currentSize = pool.size();
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if ( currentSize < poolSize ) {
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if ( traceEnabled ) {
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LOG.tracev( "Returning connection to pool, pool size: {0}", ( currentSize + 1 ) );
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}
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pool.add( conn );
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return;
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}
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}
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LOG.debug( "Closing JDBC connection" );
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conn.close();
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}
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@Override
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protected void finalize() throws Throwable {
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if ( !stopped ) {
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if ( active ) {
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stop();
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}
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super.finalize();
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}
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@Override
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public boolean supportsAggressiveRelease() {
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return false;
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// ConnectionCreator ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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protected static interface ConnectionCreator {
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public String getUrl();
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public Connection createConnection() throws SQLException;
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}
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protected static class ConnectionCreatorBuilder {
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private Driver driver;
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private String url;
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private Properties connectionProps;
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private Boolean autoCommit;
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private Integer isolation;
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public void setDriver(Driver driver) {
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this.driver = driver;
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}
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public void setUrl(String url) {
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this.url = url;
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}
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public void setConnectionProps(Properties connectionProps) {
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this.connectionProps = connectionProps;
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}
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public void setAutoCommit(Boolean autoCommit) {
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this.autoCommit = autoCommit;
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}
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public void setIsolation(Integer isolation) {
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this.isolation = isolation;
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}
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public ConnectionCreator build() {
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if ( driver == null ) {
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return new DriverManagerConnectionCreator( url, connectionProps, autoCommit, isolation );
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}
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else {
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return new DriverConnectionCreator( driver, url, connectionProps, autoCommit, isolation );
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}
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}
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}
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protected abstract static class BasicConnectionCreator implements ConnectionCreator {
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private final String url;
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private final Properties connectionProps;
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private final Boolean autocommit;
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private final Integer isolation;
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public BasicConnectionCreator(
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String url,
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Properties connectionProps,
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Boolean autocommit,
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Integer isolation) {
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this.url = url;
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this.connectionProps = connectionProps;
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this.autocommit = autocommit;
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this.isolation = isolation;
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}
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@Override
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public void injectServices(ServiceRegistryImplementor serviceRegistry) {
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this.serviceRegistry = serviceRegistry;
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public String getUrl() {
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return url;
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}
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@Override
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public Connection createConnection() throws SQLException {
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final Connection conn = makeConnection( url, connectionProps );
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if ( isolation != null ) {
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conn.setTransactionIsolation( isolation );
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}
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if ( autocommit != null && conn.getAutoCommit() != autocommit ) {
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conn.setAutoCommit( autocommit );
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}
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return conn;
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}
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protected abstract Connection makeConnection(String url, Properties connectionProps) throws SQLException;
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}
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protected static class DriverConnectionCreator extends BasicConnectionCreator {
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private final Driver driver;
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public DriverConnectionCreator(
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Driver driver,
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String url,
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Properties connectionProps,
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Boolean autocommit,
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Integer isolation) {
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super( url, connectionProps, autocommit, isolation );
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this.driver = driver;
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}
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@Override
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protected Connection makeConnection(String url, Properties connectionProps) throws SQLException {
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return driver.connect( url, connectionProps );
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}
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}
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protected static class DriverManagerConnectionCreator extends BasicConnectionCreator {
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public DriverManagerConnectionCreator(
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String url,
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Properties connectionProps,
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Boolean autocommit,
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Integer isolation) {
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super( url, connectionProps, autocommit, isolation );
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}
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@Override
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protected Connection makeConnection(String url, Properties connectionProps) throws SQLException {
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return DriverManager.getConnection( url, connectionProps );
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}
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}
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}
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@ -143,6 +143,30 @@ public final class ConfigurationHelper {
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);
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}
|
||||
|
||||
/**
|
||||
* Get the config value as a boolean (default of false)
|
||||
*
|
||||
* @param name The config setting name.
|
||||
* @param values The map of config values
|
||||
*
|
||||
* @return The value.
|
||||
*/
|
||||
public static Boolean getBooleanWrapper(String name, Map values, Boolean defaultValue) {
|
||||
Object value = values.get( name );
|
||||
if ( value == null ) {
|
||||
return defaultValue;
|
||||
}
|
||||
if ( Boolean.class.isInstance( value ) ) {
|
||||
return (Boolean) value;
|
||||
}
|
||||
if ( String.class.isInstance( value ) ) {
|
||||
return Boolean.valueOf( (String) value );
|
||||
}
|
||||
throw new ConfigurationException(
|
||||
"Could not determine how to handle configuration value [name=" + name + ", value=" + value + "] as boolean"
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the config value as an int
|
||||
*
|
||||
|
|
@ -199,6 +223,23 @@ public final class ConfigurationHelper {
|
|||
);
|
||||
}
|
||||
|
||||
public static long getLong(String name, Map values, int defaultValue) {
|
||||
Object value = values.get( name );
|
||||
if ( value == null ) {
|
||||
return defaultValue;
|
||||
}
|
||||
if ( Long.class.isInstance( value ) ) {
|
||||
return (Long) value;
|
||||
}
|
||||
if ( String.class.isInstance( value ) ) {
|
||||
return Long.parseLong( (String) value );
|
||||
}
|
||||
throw new ConfigurationException(
|
||||
"Could not determine how to handle configuration value [name=" + name +
|
||||
", value=" + value + "(" + value.getClass().getName() + ")] as long"
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Make a clone of the configuration values.
|
||||
*
|
||||
|
|
|
|||
|
|
@ -76,6 +76,7 @@ public class EnumeratedTypeTest extends BaseCoreFunctionalTestCase {
|
|||
|
||||
session.getTransaction().commit();
|
||||
session.close();
|
||||
|
||||
session = openSession();
|
||||
session.getTransaction().begin();
|
||||
|
||||
|
|
@ -105,6 +106,7 @@ public class EnumeratedTypeTest extends BaseCoreFunctionalTestCase {
|
|||
|
||||
session.getTransaction().commit();
|
||||
session.close();
|
||||
|
||||
session = openSession();
|
||||
session.getTransaction().begin();
|
||||
|
||||
|
|
@ -133,6 +135,7 @@ public class EnumeratedTypeTest extends BaseCoreFunctionalTestCase {
|
|||
|
||||
session.getTransaction().commit();
|
||||
session.close();
|
||||
|
||||
session = openSession();
|
||||
session.getTransaction().begin();
|
||||
|
||||
|
|
@ -162,6 +165,7 @@ public class EnumeratedTypeTest extends BaseCoreFunctionalTestCase {
|
|||
|
||||
session.getTransaction().commit();
|
||||
session.close();
|
||||
|
||||
session = openSession();
|
||||
session.getTransaction().begin();
|
||||
|
||||
|
|
@ -191,6 +195,7 @@ public class EnumeratedTypeTest extends BaseCoreFunctionalTestCase {
|
|||
|
||||
session.getTransaction().commit();
|
||||
session.close();
|
||||
|
||||
session = openSession();
|
||||
session.getTransaction().begin();
|
||||
|
||||
|
|
@ -369,7 +374,9 @@ public class EnumeratedTypeTest extends BaseCoreFunctionalTestCase {
|
|||
assertEquals( resultList.size(), 1 );
|
||||
assertEquals( resultList.get(0).getTrimmed(), Trimmed.A );
|
||||
|
||||
s.getTransaction().rollback();
|
||||
statement.execute( "delete from EntityEnum" );
|
||||
|
||||
s.getTransaction().commit();
|
||||
s.close();
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue