Java tutorial
/* * 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.ode.utils; import org.apache.commons.logging.Log; import javax.sql.DataSource; import java.io.PrintWriter; import java.sql.Connection; import java.sql.SQLException; /** * @author Matthieu Riou <mriou at apache dot org> */ public class LoggingDataSourceWrapper implements DataSource { private DataSource _wrapped; private Log _log; public LoggingDataSourceWrapper(DataSource wrapped, Log log) { _wrapped = wrapped; _log = log; } public Connection getConnection() throws SQLException { Connection conn = new LoggingConnectionWrapper(_wrapped.getConnection(), _log); if (shouldPrint()) print("getConnection (tx=" + conn.getTransactionIsolation() + ")"); return conn; } public Connection getConnection(String username, String password) throws SQLException { Connection conn = new LoggingConnectionWrapper(_wrapped.getConnection(username, password), _log); if (shouldPrint()) print("getConnection (tx=" + conn.getTransactionIsolation() + ")"); return conn; } public int getLoginTimeout() throws SQLException { return _wrapped.getLoginTimeout(); } public PrintWriter getLogWriter() throws SQLException { return _wrapped.getLogWriter(); } public void setLoginTimeout(int seconds) throws SQLException { _wrapped.setLoginTimeout(seconds); } public void setLogWriter(PrintWriter out) throws SQLException { _wrapped.setLogWriter(out); } private boolean shouldPrint() { if (_log != null) return _log.isDebugEnabled(); else return true; } private void print(String str) { if (_log != null) _log.debug(str); else System.out.println(str); } }