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Plugin for DataNucleus providing persistence to RDBMS datastores.
/*
* 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.datanucleus.store.rdbms.datasource.dbcp2;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Collection;
import java.util.concurrent.atomic.AtomicLong;
import javax.management.ObjectName;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.KeyedObjectPool;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.ObjectPool;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.PooledObject;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.PooledObjectFactory;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.impl.GenericKeyedObjectPool;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.impl.GenericKeyedObjectPoolConfig;
import org.datanucleus.util.NucleusLogger;
import org.datanucleus.store.rdbms.datasource.dbcp2.pool2.impl.DefaultPooledObject;
/**
* A {@link PooledObjectFactory} that creates
* {@link PoolableConnection}s.
*
* @author Rodney Waldhoff
* @author Glenn L. Nielsen
* @author James House
* @author Dirk Verbeeck
* @version $Id: PoolableConnectionFactory.java 1659452 2015-02-13 04:00:39Z psteitz $
* @since 2.0
*/
public class PoolableConnectionFactory
implements PooledObjectFactory {
private static final NucleusLogger log = NucleusLogger.CONNECTION;
/**
* Create a new {@code PoolableConnectionFactory}.
* @param connFactory the {@link ConnectionFactory} from which to obtain
* base {@link Connection}s
*/
public PoolableConnectionFactory(ConnectionFactory connFactory,
ObjectName dataSourceJmxName) {
_connFactory = connFactory;
this.dataSourceJmxName = dataSourceJmxName;
}
/**
* Sets the query I use to {@link #validateObject validate} {@link Connection}s.
* Should return at least one row. If not specified,
* {@link Connection#isValid(int)} will be used to validate connections.
*
* @param validationQuery a query to use to {@link #validateObject validate} {@link Connection}s.
*/
public void setValidationQuery(String validationQuery) {
_validationQuery = validationQuery;
}
/**
* Sets the validation query timeout, the amount of time, in seconds, that
* connection validation will wait for a response from the database when
* executing a validation query. Use a value less than or equal to 0 for
* no timeout.
*
* @param timeout new validation query timeout value in seconds
*/
public void setValidationQueryTimeout(int timeout) {
_validationQueryTimeout = timeout;
}
/**
* Sets the SQL statements I use to initialize newly created {@link Connection}s.
* Using {@code null} turns off connection initialization.
* @param connectionInitSqls SQL statement to initialize {@link Connection}s.
*/
public void setConnectionInitSql(Collection connectionInitSqls) {
_connectionInitSqls = connectionInitSqls;
}
/**
* Sets the {@link ObjectPool} in which to pool {@link Connection}s.
* @param pool the {@link ObjectPool} in which to pool those {@link Connection}s
*/
public synchronized void setPool(ObjectPool pool) {
if(null != _pool && pool != _pool) {
try {
_pool.close();
} catch(Exception e) {
// ignored !?!
}
}
_pool = pool;
}
/**
* Returns the {@link ObjectPool} in which {@link Connection}s are pooled.
* @return the connection pool
*/
public synchronized ObjectPool getPool() {
return _pool;
}
/**
* Sets the default "read only" setting for borrowed {@link Connection}s
* @param defaultReadOnly the default "read only" setting for borrowed {@link Connection}s
*/
public void setDefaultReadOnly(Boolean defaultReadOnly) {
_defaultReadOnly = defaultReadOnly;
}
/**
* Sets the default "auto commit" setting for borrowed {@link Connection}s
* @param defaultAutoCommit the default "auto commit" setting for borrowed {@link Connection}s
*/
public void setDefaultAutoCommit(Boolean defaultAutoCommit) {
_defaultAutoCommit = defaultAutoCommit;
}
/**
* Sets the default "Transaction Isolation" setting for borrowed {@link Connection}s
* @param defaultTransactionIsolation the default "Transaction Isolation" setting for returned {@link Connection}s
*/
public void setDefaultTransactionIsolation(int defaultTransactionIsolation) {
_defaultTransactionIsolation = defaultTransactionIsolation;
}
/**
* Sets the default "catalog" setting for borrowed {@link Connection}s
* @param defaultCatalog the default "catalog" setting for borrowed {@link Connection}s
*/
public void setDefaultCatalog(String defaultCatalog) {
_defaultCatalog = defaultCatalog;
}
public void setCacheState(boolean cacheState) {
this._cacheState = cacheState;
}
public void setPoolStatements(boolean poolStatements) {
this.poolStatements = poolStatements;
}
public void setMaxOpenPrepatedStatements(int maxOpenPreparedStatements) {
this.maxOpenPreparedStatements = maxOpenPreparedStatements;
}
/**
* Sets the maximum lifetime in milliseconds of a connection after which the
* connection will always fail activation, passivation and validation. A
* value of zero or less indicates an infinite lifetime. The default value
* is -1.
*/
public void setMaxConnLifetimeMillis(long maxConnLifetimeMillis) {
this.maxConnLifetimeMillis = maxConnLifetimeMillis;
}
public boolean isEnableAutoCommitOnReturn() {
return enableAutoCommitOnReturn;
}
public void setEnableAutoCommitOnReturn(boolean enableAutoCommitOnReturn) {
this.enableAutoCommitOnReturn = enableAutoCommitOnReturn;
}
public boolean isRollbackOnReturn() {
return rollbackOnReturn;
}
public void setRollbackOnReturn(boolean rollbackOnReturn) {
this.rollbackOnReturn = rollbackOnReturn;
}
public Integer getDefaultQueryTimeout() {
return defaultQueryTimeout;
}
public void setDefaultQueryTimeout(Integer defaultQueryTimeout) {
this.defaultQueryTimeout = defaultQueryTimeout;
}
/**
* SQL_STATE codes considered to signal fatal conditions.
*
* Overrides the defaults in {@link Utils#DISCONNECTION_SQL_CODES}
* (plus anything starting with {@link Utils#DISCONNECTION_SQL_CODE_PREFIX}).
* If this property is non-null and {@link #isFastFailValidation()} is
* {@code true}, whenever connections created by this factory generate exceptions
* with SQL_STATE codes in this list, they will be marked as "fatally disconnected"
* and subsequent validations will fail fast (no attempt at isValid or validation
* query).
*
* If {@link #isFastFailValidation()} is {@code false} setting this property has no
* effect.
*
* @return SQL_STATE codes overriding defaults
* @since 2.1
*/
public Collection getDisconnectionSqlCodes() {
return _disconnectionSqlCodes;
}
/**
* @see #getDisconnectionSqlCodes()
* @param disconnectionSqlCodes
* @since 2.1
*/
public void setDisconnectionSqlCodes(Collection disconnectionSqlCodes) {
_disconnectionSqlCodes = disconnectionSqlCodes;
}
/**
* True means that validation will fail immediately for connections that
* have previously thrown SQLExceptions with SQL_STATE indicating fatal
* disconnection errors.
*
* @return true if connections created by this factory will fast fail validation.
* @see #setDisconnectionSqlCodes(Collection)
* @since 2.1
*/
public boolean isFastFailValidation() {
return _fastFailValidation;
}
/**
* @see #isFastFailValidation()
* @param fastFailValidation true means connections created by this factory will
* fast fail validation
* @since 2.1
*/
public void setFastFailValidation(boolean fastFailValidation) {
_fastFailValidation = fastFailValidation;
}
@Override
public PooledObject makeObject() throws Exception {
Connection conn = _connFactory.createConnection();
if (conn == null) {
throw new IllegalStateException("Connection factory returned null from createConnection");
}
try {
initializeConnection(conn);
} catch (SQLException sqle) {
// Make sure the connection is closed
try {
conn.close();
} catch (SQLException ignore) {
// ignore
}
// Rethrow original exception so it is visible to caller
throw sqle;
}
long connIndex = connectionIndex.getAndIncrement();
if(poolStatements) {
conn = new PoolingConnection(conn);
GenericKeyedObjectPoolConfig config = new GenericKeyedObjectPoolConfig();
config.setMaxTotalPerKey(-1);
config.setBlockWhenExhausted(false);
config.setMaxWaitMillis(0);
config.setMaxIdlePerKey(1);
config.setMaxTotal(maxOpenPreparedStatements);
if (dataSourceJmxName != null) {
StringBuilder base = new StringBuilder(dataSourceJmxName.toString());
base.append(Constants.JMX_CONNECTION_BASE_EXT);
base.append(Long.toString(connIndex));
config.setJmxNameBase(base.toString());
config.setJmxNamePrefix(Constants.JMX_STATEMENT_POOL_PREFIX);
} else {
config.setJmxEnabled(false);
}
KeyedObjectPool stmtPool =
new GenericKeyedObjectPool<>((PoolingConnection)conn, config);
((PoolingConnection)conn).setStatementPool(stmtPool);
((PoolingConnection) conn).setCacheState(_cacheState);
}
// Register this connection with JMX
ObjectName connJmxName;
if (dataSourceJmxName == null) {
connJmxName = null;
} else {
connJmxName = new ObjectName(dataSourceJmxName.toString() +
Constants.JMX_CONNECTION_BASE_EXT + connIndex);
}
PoolableConnection pc = new PoolableConnection(conn,_pool, connJmxName,
_disconnectionSqlCodes, _fastFailValidation);
return new DefaultPooledObject<>(pc);
}
protected void initializeConnection(Connection conn) throws SQLException {
Collection sqls = _connectionInitSqls;
if(conn.isClosed()) {
throw new SQLException("initializeConnection: connection closed");
}
if(null != sqls) {
try (Statement stmt = conn.createStatement();) {
for (String sql : sqls) {
if (sql == null) {
throw new NullPointerException(
"null connectionInitSqls element");
}
stmt.execute(sql);
}
}
}
}
@Override
public void destroyObject(PooledObject p)
throws Exception {
p.getObject().reallyClose();
}
@Override
public boolean validateObject(PooledObject p) {
try {
validateLifetime(p);
validateConnection(p.getObject());
return true;
} catch (Exception e) {
if (log.isDebugEnabled()) {
log.debug(Utils.getMessage(
"poolableConnectionFactory.validateObject.fail"), e);
}
return false;
}
}
public void validateConnection(PoolableConnection conn) throws SQLException {
if(conn.isClosed()) {
throw new SQLException("validateConnection: connection closed");
}
conn.validate(_validationQuery, _validationQueryTimeout);
}
@Override
public void passivateObject(PooledObject p)
throws Exception {
validateLifetime(p);
PoolableConnection conn = p.getObject();
Boolean connAutoCommit = null;
if (rollbackOnReturn) {
connAutoCommit = Boolean.valueOf(conn.getAutoCommit());
if(!connAutoCommit.booleanValue() && !conn.isReadOnly()) {
conn.rollback();
}
}
conn.clearWarnings();
// DBCP-97 / DBCP-399 / DBCP-351 Idle connections in the pool should
// have autoCommit enabled
if (enableAutoCommitOnReturn) {
if (connAutoCommit == null) {
connAutoCommit = Boolean.valueOf(conn.getAutoCommit());
}
if(!connAutoCommit.booleanValue()) {
conn.setAutoCommit(true);
}
}
conn.passivate();
}
@Override
public void activateObject(PooledObject p)
throws Exception {
validateLifetime(p);
PoolableConnection conn = p.getObject();
conn.activate();
if (_defaultAutoCommit != null &&
conn.getAutoCommit() != _defaultAutoCommit.booleanValue()) {
conn.setAutoCommit(_defaultAutoCommit.booleanValue());
}
if (_defaultTransactionIsolation != UNKNOWN_TRANSACTIONISOLATION &&
conn.getTransactionIsolation() != _defaultTransactionIsolation) {
conn.setTransactionIsolation(_defaultTransactionIsolation);
}
if (_defaultReadOnly != null &&
conn.isReadOnly() != _defaultReadOnly.booleanValue()) {
conn.setReadOnly(_defaultReadOnly.booleanValue());
}
if (_defaultCatalog != null &&
!_defaultCatalog.equals(conn.getCatalog())) {
conn.setCatalog(_defaultCatalog);
}
conn.setDefaultQueryTimeout(defaultQueryTimeout);
}
private void validateLifetime(PooledObject p)
throws Exception {
if (maxConnLifetimeMillis > 0) {
long lifetime = System.currentTimeMillis() - p.getCreateTime();
if (lifetime > maxConnLifetimeMillis) {
throw new LifetimeExceededException(Utils.getMessage(
"connectionFactory.lifetimeExceeded",
Long.valueOf(lifetime),
Long.valueOf(maxConnLifetimeMillis)));
}
}
}
protected ConnectionFactory getConnectionFactory() {
return _connFactory;
}
protected boolean getPoolStatements() {
return poolStatements;
}
protected int getMaxOpenPreparedStatements() {
return maxOpenPreparedStatements;
}
protected boolean getCacheState() {
return _cacheState;
}
protected ObjectName getDataSourceJmxName() {
return dataSourceJmxName;
}
protected AtomicLong getConnectionIndex() {
return connectionIndex;
}
private final ConnectionFactory _connFactory;
private final ObjectName dataSourceJmxName;
private volatile String _validationQuery = null;
private volatile int _validationQueryTimeout = -1;
private Collection _connectionInitSqls = null;
private Collection _disconnectionSqlCodes = null;
private boolean _fastFailValidation = false;
private volatile ObjectPool _pool = null;
private Boolean _defaultReadOnly = null;
private Boolean _defaultAutoCommit = null;
private boolean enableAutoCommitOnReturn = true;
private boolean rollbackOnReturn = true;
private int _defaultTransactionIsolation = UNKNOWN_TRANSACTIONISOLATION;
private String _defaultCatalog;
private boolean _cacheState;
private boolean poolStatements = false;
private int maxOpenPreparedStatements =
GenericKeyedObjectPoolConfig.DEFAULT_MAX_TOTAL_PER_KEY;
private long maxConnLifetimeMillis = -1;
private final AtomicLong connectionIndex = new AtomicLong(0);
private Integer defaultQueryTimeout = null;
/**
* Internal constant to indicate the level is not set.
*/
static final int UNKNOWN_TRANSACTIONISOLATION = -1;
}