init
This commit is contained in:
602
java/org/apache/tomcat/dbcp/dbcp2/PoolingConnection.java
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602
java/org/apache/tomcat/dbcp/dbcp2/PoolingConnection.java
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@@ -0,0 +1,602 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||
* contributor license agreements. See the NOTICE file distributed with
|
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* this work for additional information regarding copyright ownership.
|
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* 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
|
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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||||
* 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.
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*/
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package org.apache.tomcat.dbcp.dbcp2;
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import java.sql.CallableStatement;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import java.util.NoSuchElementException;
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import org.apache.tomcat.dbcp.pool2.KeyedObjectPool;
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import org.apache.tomcat.dbcp.pool2.KeyedPooledObjectFactory;
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import org.apache.tomcat.dbcp.pool2.PooledObject;
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import org.apache.tomcat.dbcp.pool2.impl.DefaultPooledObject;
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/**
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* A {@link DelegatingConnection} that pools {@link PreparedStatement}s.
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* <p>
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* The {@link #prepareStatement} and {@link #prepareCall} methods, rather than creating a new PreparedStatement each
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* time, may actually pull the statement from a pool of unused statements. The {@link PreparedStatement#close} method of
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* the returned statement doesn't actually close the statement, but rather returns it to the pool. (See
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* {@link PoolablePreparedStatement}, {@link PoolableCallableStatement}.)
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* </p>
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*
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* @see PoolablePreparedStatement
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* @since 2.0
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*/
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public class PoolingConnection extends DelegatingConnection<Connection>
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implements KeyedPooledObjectFactory<PStmtKey, DelegatingPreparedStatement> {
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/**
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* Statement types.
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*
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* @since 2.0 protected enum.
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* @since 2.4.0 public enum.
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*/
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public enum StatementType {
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/**
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* Callable statement.
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*/
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CALLABLE_STATEMENT,
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/**
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* Prepared statement.
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*/
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PREPARED_STATEMENT
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}
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/** Pool of {@link PreparedStatement}s. and {@link CallableStatement}s */
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private KeyedObjectPool<PStmtKey, DelegatingPreparedStatement> pstmtPool;
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/**
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* Constructor.
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*
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* @param connection
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* the underlying {@link Connection}.
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*/
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public PoolingConnection(final Connection connection) {
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super(connection);
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}
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/**
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* {@link KeyedPooledObjectFactory} method for activating pooled statements.
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*
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* @param key
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* ignored
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* @param pooledObject
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* wrapped pooled statement to be activated
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*/
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@Override
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public void activateObject(final PStmtKey key, final PooledObject<DelegatingPreparedStatement> pooledObject)
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throws Exception {
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pooledObject.getObject().activate();
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}
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/**
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* Closes and frees all {@link PreparedStatement}s or {@link CallableStatement}s from the pool, and close the
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* underlying connection.
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*/
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@Override
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public synchronized void close() throws SQLException {
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try {
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if (null != pstmtPool) {
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final KeyedObjectPool<PStmtKey, DelegatingPreparedStatement> oldpool = pstmtPool;
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pstmtPool = null;
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try {
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oldpool.close();
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} catch (final RuntimeException e) {
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throw e;
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} catch (final Exception e) {
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throw new SQLException("Cannot close connection", e);
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}
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}
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} finally {
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try {
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getDelegateInternal().close();
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} finally {
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setClosedInternal(true);
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}
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}
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}
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/**
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* Creates a PStmtKey for the given arguments.
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*
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* @param sql
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* the SQL string used to define the statement
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*
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* @return the PStmtKey created for the given arguments.
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*/
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protected PStmtKey createKey(final String sql) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull());
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}
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/**
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* Creates a PStmtKey for the given arguments.
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*
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* @param sql
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* the SQL string used to define the statement
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* @param columnIndexes
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* column indexes
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*
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* @return the PStmtKey created for the given arguments.
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*/
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protected PStmtKey createKey(final String sql, final int columnIndexes[]) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), columnIndexes);
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}
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protected PStmtKey createKey(final String sql, final int autoGeneratedKeys) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), autoGeneratedKeys);
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}
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/**
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* Creates a PStmtKey for the given arguments.
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*
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* @param sql
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* the SQL string used to define the statement
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* @param resultSetType
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* result set type
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* @param resultSetConcurrency
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* result set concurrency
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*
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* @return the PStmtKey created for the given arguments.
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*/
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protected PStmtKey createKey(final String sql, final int resultSetType, final int resultSetConcurrency) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), resultSetType, resultSetConcurrency);
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}
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|
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/**
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* Creates a PStmtKey for the given arguments.
|
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*
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* @param sql
|
||||
* the SQL string used to define the statement
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* @param resultSetType
|
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* result set type
|
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* @param resultSetConcurrency
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* result set concurrency
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* @param resultSetHoldability
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* result set holdability
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||||
*
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* @return the PStmtKey created for the given arguments.
|
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*/
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protected PStmtKey createKey(final String sql, final int resultSetType, final int resultSetConcurrency,
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final int resultSetHoldability) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), resultSetType, resultSetConcurrency,
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resultSetHoldability);
|
||||
}
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||||
|
||||
/**
|
||||
* Creates a PStmtKey for the given arguments.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the statement
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||||
* @param resultSetType
|
||||
* result set type
|
||||
* @param resultSetConcurrency
|
||||
* result set concurrency
|
||||
* @param resultSetHoldability
|
||||
* result set holdability
|
||||
* @param statementType
|
||||
* statement type
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||||
*
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||||
* @return the PStmtKey created for the given arguments.
|
||||
*/
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||||
protected PStmtKey createKey(final String sql, final int resultSetType, final int resultSetConcurrency,
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final int resultSetHoldability, final StatementType statementType) {
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||||
return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), resultSetType, resultSetConcurrency,
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||||
resultSetHoldability, statementType);
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||||
}
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||||
|
||||
/**
|
||||
* Creates a PStmtKey for the given arguments.
|
||||
*
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||||
* @param sql
|
||||
* the SQL string used to define the statement
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||||
* @param resultSetType
|
||||
* result set type
|
||||
* @param resultSetConcurrency
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||||
* result set concurrency
|
||||
* @param statementType
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||||
* statement type
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||||
*
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* @return the PStmtKey created for the given arguments.
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||||
*/
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||||
protected PStmtKey createKey(final String sql, final int resultSetType, final int resultSetConcurrency,
|
||||
final StatementType statementType) {
|
||||
return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), resultSetType, resultSetConcurrency, statementType);
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||||
}
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||||
|
||||
/**
|
||||
* Creates a PStmtKey for the given arguments.
|
||||
*
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||||
* @param sql
|
||||
* the SQL string used to define the statement
|
||||
* @param statementType
|
||||
* statement type
|
||||
*
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||||
* @return the PStmtKey created for the given arguments.
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*/
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protected PStmtKey createKey(final String sql, final StatementType statementType) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), statementType, null);
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}
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|
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/**
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* Creates a PStmtKey for the given arguments.
|
||||
*
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* @param sql
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||||
* the SQL string used to define the statement
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* @param columnNames
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||||
* column names
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||||
*
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* @return the PStmtKey created for the given arguments.
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*/
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protected PStmtKey createKey(final String sql, final String columnNames[]) {
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return new PStmtKey(normalizeSQL(sql), getCatalogOrNull(), getSchemaOrNull(), columnNames);
|
||||
}
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||||
|
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/**
|
||||
* {@link KeyedPooledObjectFactory} method for destroying PoolablePreparedStatements and PoolableCallableStatements.
|
||||
* Closes the underlying statement.
|
||||
*
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* @param key
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* ignored
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||||
* @param pooledObject
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* the wrapped pooled statement to be destroyed.
|
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*/
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@Override
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public void destroyObject(final PStmtKey key, final PooledObject<DelegatingPreparedStatement> pooledObject)
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throws Exception {
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pooledObject.getObject().getInnermostDelegate().close();
|
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}
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||||
|
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private String getCatalogOrNull() {
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String catalog = null;
|
||||
try {
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catalog = getCatalog();
|
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} catch (final SQLException e) {
|
||||
// Ignored
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||||
}
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||||
return catalog;
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||||
}
|
||||
|
||||
private String getSchemaOrNull() {
|
||||
String catalog = null;
|
||||
try {
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||||
catalog = getSchema();
|
||||
} catch (final SQLException e) {
|
||||
// Ignored
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||||
}
|
||||
return catalog;
|
||||
}
|
||||
|
||||
/**
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||||
* {@link KeyedPooledObjectFactory} method for creating {@link PoolablePreparedStatement}s or
|
||||
* {@link PoolableCallableStatement}s. The <code>stmtType</code> field in the key determines whether a
|
||||
* PoolablePreparedStatement or PoolableCallableStatement is created.
|
||||
*
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||||
* @param key
|
||||
* the key for the {@link PreparedStatement} to be created
|
||||
* @see #createKey(String, int, int, StatementType)
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||||
*/
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||||
@SuppressWarnings("resource")
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||||
@Override
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||||
public PooledObject<DelegatingPreparedStatement> makeObject(final PStmtKey key) throws Exception {
|
||||
if (null == key) {
|
||||
throw new IllegalArgumentException("Prepared statement key is null or invalid.");
|
||||
}
|
||||
if (key.getStmtType() == StatementType.PREPARED_STATEMENT) {
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||||
final PreparedStatement statement = (PreparedStatement) key.createStatement(getDelegate());
|
||||
@SuppressWarnings({"rawtypes", "unchecked" }) // Unable to find way to avoid this
|
||||
final PoolablePreparedStatement pps = new PoolablePreparedStatement(statement, key, pstmtPool, this);
|
||||
return new DefaultPooledObject<DelegatingPreparedStatement>(pps);
|
||||
}
|
||||
final CallableStatement statement = (CallableStatement) key.createStatement(getDelegate());
|
||||
final PoolableCallableStatement pcs = new PoolableCallableStatement(statement, key, pstmtPool, this);
|
||||
return new DefaultPooledObject<DelegatingPreparedStatement>(pcs);
|
||||
}
|
||||
|
||||
/**
|
||||
* Normalizes the given SQL statement, producing a canonical form that is semantically equivalent to the original.
|
||||
*
|
||||
* @param sql The statement to be normalized.
|
||||
*
|
||||
* @return The canonical form of the supplied SQL statement.
|
||||
*/
|
||||
protected String normalizeSQL(final String sql) {
|
||||
return sql.trim();
|
||||
}
|
||||
|
||||
/**
|
||||
* {@link KeyedPooledObjectFactory} method for passivating {@link PreparedStatement}s or {@link CallableStatement}s.
|
||||
* Invokes {@link PreparedStatement#clearParameters}.
|
||||
*
|
||||
* @param key
|
||||
* ignored
|
||||
* @param pooledObject
|
||||
* a wrapped {@link PreparedStatement}
|
||||
*/
|
||||
@Override
|
||||
public void passivateObject(final PStmtKey key, final PooledObject<DelegatingPreparedStatement> pooledObject)
|
||||
throws Exception {
|
||||
@SuppressWarnings("resource")
|
||||
final DelegatingPreparedStatement dps = pooledObject.getObject();
|
||||
dps.clearParameters();
|
||||
dps.passivate();
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link CallableStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the CallableStatement
|
||||
* @return a {@link PoolableCallableStatement}
|
||||
* @throws SQLException
|
||||
* Wraps an underlying exception.
|
||||
*/
|
||||
@Override
|
||||
public CallableStatement prepareCall(final String sql) throws SQLException {
|
||||
try {
|
||||
return (CallableStatement) pstmtPool.borrowObject(createKey(sql, StatementType.CALLABLE_STATEMENT));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenCallableStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow callableStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link CallableStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the CallableStatement
|
||||
* @param resultSetType
|
||||
* result set type
|
||||
* @param resultSetConcurrency
|
||||
* result set concurrency
|
||||
* @return a {@link PoolableCallableStatement}
|
||||
* @throws SQLException
|
||||
* Wraps an underlying exception.
|
||||
*/
|
||||
@Override
|
||||
public CallableStatement prepareCall(final String sql, final int resultSetType, final int resultSetConcurrency)
|
||||
throws SQLException {
|
||||
try {
|
||||
return (CallableStatement) pstmtPool.borrowObject(
|
||||
createKey(sql, resultSetType, resultSetConcurrency, StatementType.CALLABLE_STATEMENT));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenCallableStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow callableStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link CallableStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the CallableStatement
|
||||
* @param resultSetType
|
||||
* result set type
|
||||
* @param resultSetConcurrency
|
||||
* result set concurrency
|
||||
* @param resultSetHoldability
|
||||
* result set holdability
|
||||
* @return a {@link PoolableCallableStatement}
|
||||
* @throws SQLException
|
||||
* Wraps an underlying exception.
|
||||
*/
|
||||
@Override
|
||||
public CallableStatement prepareCall(final String sql, final int resultSetType, final int resultSetConcurrency,
|
||||
final int resultSetHoldability) throws SQLException {
|
||||
try {
|
||||
return (CallableStatement) pstmtPool.borrowObject(createKey(sql, resultSetType, resultSetConcurrency,
|
||||
resultSetHoldability, StatementType.CALLABLE_STATEMENT));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenCallableStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow callableStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link PreparedStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the PreparedStatement
|
||||
* @return a {@link PoolablePreparedStatement}
|
||||
*/
|
||||
@Override
|
||||
public PreparedStatement prepareStatement(final String sql) throws SQLException {
|
||||
if (null == pstmtPool) {
|
||||
throw new SQLException("Statement pool is null - closed or invalid PoolingConnection.");
|
||||
}
|
||||
try {
|
||||
return pstmtPool.borrowObject(createKey(sql));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenPreparedStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow prepareStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public PreparedStatement prepareStatement(final String sql, final int autoGeneratedKeys) throws SQLException {
|
||||
if (null == pstmtPool) {
|
||||
throw new SQLException("Statement pool is null - closed or invalid PoolingConnection.");
|
||||
}
|
||||
try {
|
||||
return pstmtPool.borrowObject(createKey(sql, autoGeneratedKeys));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenPreparedStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow prepareStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link PreparedStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the PreparedStatement
|
||||
* @param columnIndexes
|
||||
* column indexes
|
||||
* @return a {@link PoolablePreparedStatement}
|
||||
*/
|
||||
@Override
|
||||
public PreparedStatement prepareStatement(final String sql, final int columnIndexes[]) throws SQLException {
|
||||
if (null == pstmtPool) {
|
||||
throw new SQLException("Statement pool is null - closed or invalid PoolingConnection.");
|
||||
}
|
||||
try {
|
||||
return pstmtPool.borrowObject(createKey(sql, columnIndexes));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenPreparedStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow prepareStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link PreparedStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the PreparedStatement
|
||||
* @param resultSetType
|
||||
* result set type
|
||||
* @param resultSetConcurrency
|
||||
* result set concurrency
|
||||
* @return a {@link PoolablePreparedStatement}
|
||||
*/
|
||||
@Override
|
||||
public PreparedStatement prepareStatement(final String sql, final int resultSetType, final int resultSetConcurrency)
|
||||
throws SQLException {
|
||||
if (null == pstmtPool) {
|
||||
throw new SQLException("Statement pool is null - closed or invalid PoolingConnection.");
|
||||
}
|
||||
try {
|
||||
return pstmtPool.borrowObject(createKey(sql, resultSetType, resultSetConcurrency));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenPreparedStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow prepareStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link PreparedStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the PreparedStatement
|
||||
* @param resultSetType
|
||||
* result set type
|
||||
* @param resultSetConcurrency
|
||||
* result set concurrency
|
||||
* @param resultSetHoldability
|
||||
* result set holdability
|
||||
* @return a {@link PoolablePreparedStatement}
|
||||
*/
|
||||
@Override
|
||||
public PreparedStatement prepareStatement(final String sql, final int resultSetType, final int resultSetConcurrency,
|
||||
final int resultSetHoldability) throws SQLException {
|
||||
if (null == pstmtPool) {
|
||||
throw new SQLException("Statement pool is null - closed or invalid PoolingConnection.");
|
||||
}
|
||||
try {
|
||||
return pstmtPool.borrowObject(createKey(sql, resultSetType, resultSetConcurrency, resultSetHoldability));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenPreparedStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow prepareStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates or obtains a {@link PreparedStatement} from the pool.
|
||||
*
|
||||
* @param sql
|
||||
* the SQL string used to define the PreparedStatement
|
||||
* @param columnNames
|
||||
* column names
|
||||
* @return a {@link PoolablePreparedStatement}
|
||||
*/
|
||||
@Override
|
||||
public PreparedStatement prepareStatement(final String sql, final String columnNames[]) throws SQLException {
|
||||
if (null == pstmtPool) {
|
||||
throw new SQLException("Statement pool is null - closed or invalid PoolingConnection.");
|
||||
}
|
||||
try {
|
||||
return pstmtPool.borrowObject(createKey(sql, columnNames));
|
||||
} catch (final NoSuchElementException e) {
|
||||
throw new SQLException("MaxOpenPreparedStatements limit reached", e);
|
||||
} catch (final RuntimeException e) {
|
||||
throw e;
|
||||
} catch (final Exception e) {
|
||||
throw new SQLException("Borrow prepareStatement from pool failed", e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the prepared statement pool.
|
||||
*
|
||||
* @param pool
|
||||
* the prepared statement pool.
|
||||
*/
|
||||
public void setStatementPool(final KeyedObjectPool<PStmtKey, DelegatingPreparedStatement> pool) {
|
||||
pstmtPool = pool;
|
||||
}
|
||||
|
||||
@Override
|
||||
public synchronized String toString() {
|
||||
if (pstmtPool != null) {
|
||||
return "PoolingConnection: " + pstmtPool.toString();
|
||||
}
|
||||
return "PoolingConnection: null";
|
||||
}
|
||||
|
||||
/**
|
||||
* {@link KeyedPooledObjectFactory} method for validating pooled statements. Currently always returns true.
|
||||
*
|
||||
* @param key
|
||||
* ignored
|
||||
* @param pooledObject
|
||||
* ignored
|
||||
* @return {@code true}
|
||||
*/
|
||||
@Override
|
||||
public boolean validateObject(final PStmtKey key, final PooledObject<DelegatingPreparedStatement> pooledObject) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user