001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.oozie.util.db; 020 021import com.mysql.jdbc.Driver; 022 023import java.sql.Connection; 024import java.sql.SQLException; 025import java.util.Properties; 026 027/** 028 * Used for runtime database error injection on MySQL. 029 * <p> 030 * Necessary steps: 031 * <ul> 032 * <li>set {@code oozie.service.JPAService.connection.data.source} to 033 * {@code org.apache.oozie.util.db.BasicDataSourceWrapper} within {@code oozie-site.xml}</li> 034 * <li>set {@code oozie.service.JPAService.jdbc.driver} to {@code org.apache.oozie.util.db.FailingMySQLDriverWrapper} 035 * within {@code oozie-site.xml}</li> 036 * <li>restart Oozie server</li> 037 * <li>submit / start some workflows, coordinators etc.</li> 038 * <li>see any of those {@code JPAException} instances with following message prefix: 039 * {@code Deliberately failing to prepare statement.}</li> 040 * </ul> 041 */ 042public class FailingMySQLDriverWrapper extends Driver { 043 public FailingMySQLDriverWrapper() throws SQLException { 044 super(); 045 } 046 047 public Connection connect(final String url, 048 final Properties info) throws SQLException { 049 return new FailingConnectionWrapper(super.connect(url, info)); 050 } 051}