| /* |
| * 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.apache.tomcat.jdbc.pool; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.sql.SQLException; |
| |
| import javax.sql.XAConnection; |
| /** |
| * A ProxyConnection object is the bottom most interceptor that wraps an object of type |
| * {@link PooledConnection}. The ProxyConnection intercepts three methods: |
| * <ul> |
| * <li>{@link java.sql.Connection#close()} - returns the connection to the pool. May be called multiple times.</li> |
| * <li>{@link java.lang.Object#toString()} - returns a custom string for this object</li> |
| * <li>{@link javax.sql.PooledConnection#getConnection()} - returns the underlying connection</li> |
| * </ul> |
| * By default method comparisons is done on a String reference level, unless the {@link PoolConfiguration#setUseEquals(boolean)} has been called |
| * with a <code>true</code> argument. |
| */ |
| public class ProxyConnection extends JdbcInterceptor { |
| |
| protected PooledConnection connection = null; |
| |
| protected ConnectionPool pool = null; |
| |
| public PooledConnection getConnection() { |
| return connection; |
| } |
| |
| public void setConnection(PooledConnection connection) { |
| this.connection = connection; |
| } |
| |
| public ConnectionPool getPool() { |
| return pool; |
| } |
| |
| public void setPool(ConnectionPool pool) { |
| this.pool = pool; |
| } |
| |
| protected ProxyConnection(ConnectionPool parent, PooledConnection con, |
| boolean useEquals) { |
| pool = parent; |
| connection = con; |
| setUseEquals(useEquals); |
| } |
| |
| @Override |
| public void reset(ConnectionPool parent, PooledConnection con) { |
| this.pool = parent; |
| this.connection = con; |
| } |
| |
| public boolean isWrapperFor(Class<?> iface) { |
| if (iface == XAConnection.class && connection.getXAConnection()!=null) { |
| return true; |
| } else { |
| return (iface.isInstance(connection.getConnection())); |
| } |
| } |
| |
| |
| public Object unwrap(Class<?> iface) throws SQLException { |
| if (iface == PooledConnection.class) { |
| return connection; |
| }else if (iface == XAConnection.class) { |
| return connection.getXAConnection(); |
| } else if (isWrapperFor(iface)) { |
| return connection.getConnection(); |
| } else { |
| throw new SQLException("Not a wrapper of "+iface.getName()); |
| } |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
| if (compare(ISCLOSED_VAL,method)) { |
| return Boolean.valueOf(isClosed()); |
| } |
| if (compare(CLOSE_VAL,method)) { |
| if (connection==null) return null; //noop for already closed. |
| PooledConnection poolc = this.connection; |
| this.connection = null; |
| pool.returnConnection(poolc); |
| return null; |
| } else if (compare(TOSTRING_VAL,method)) { |
| return this.toString(); |
| } else if (compare(GETCONNECTION_VAL,method) && connection!=null) { |
| return connection.getConnection(); |
| } else if (method.getDeclaringClass().isAssignableFrom(XAConnection.class)) { |
| try { |
| return method.invoke(connection.getXAConnection(),args); |
| }catch (Throwable t) { |
| if (t instanceof InvocationTargetException) { |
| throw t.getCause() != null ? t.getCause() : t; |
| } else { |
| throw t; |
| } |
| } |
| } |
| if (isClosed()) throw new SQLException("Connection has already been closed."); |
| if (compare(UNWRAP_VAL,method)) { |
| return unwrap((Class<?>)args[0]); |
| } else if (compare(ISWRAPPERFOR_VAL,method)) { |
| return Boolean.valueOf(this.isWrapperFor((Class<?>)args[0])); |
| } |
| try { |
| PooledConnection poolc = connection; |
| if (poolc!=null) { |
| return method.invoke(poolc.getConnection(),args); |
| } else { |
| throw new SQLException("Connection has already been closed."); |
| } |
| }catch (Throwable t) { |
| if (t instanceof InvocationTargetException) { |
| throw t.getCause() != null ? t.getCause() : t; |
| } else { |
| throw t; |
| } |
| } |
| } |
| |
| public boolean isClosed() { |
| return connection==null || connection.isDiscarded(); |
| } |
| |
| public PooledConnection getDelegateConnection() { |
| return connection; |
| } |
| |
| public ConnectionPool getParentPool() { |
| return pool; |
| } |
| |
| @Override |
| public String toString() { |
| return "ProxyConnection["+(connection!=null?connection.toString():"null")+"]"; |
| } |
| |
| } |