| /** |
| * 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.camel.component.jms.tx; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Conditionally throws exception causing a rollback |
| */ |
| public class ConditionalExceptionProcessor implements Processor { |
| |
| private static final transient Logger LOG = LoggerFactory.getLogger(ConditionalExceptionProcessor.class); |
| private int count; |
| private int maxCalls; |
| private String errorMsg; |
| |
| public ConditionalExceptionProcessor() { |
| this.maxCalls = 1; |
| } |
| |
| public ConditionalExceptionProcessor(int maxCalls) { |
| this.maxCalls = maxCalls; |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| setCount(getCount() + 1); |
| |
| if (getCount() > maxCalls * 2) { |
| errorMsg = "Expected only " + maxCalls * 2 + " calls to process() but encountered " |
| + getCount() + ". There should be 1 for intentionally triggered rollback, and 1 for redelivery for each call."; |
| } |
| |
| // should be printed 2 times due to one re-delivery after one failure |
| LOG.info("Exchange[" + getCount() + "][" + ((getCount() % 2 != 0) ? "Should rollback" : "Should succeed") |
| + "] = " + exchange); |
| |
| // force rollback on every mod 2 attempt |
| if (getCount() % 2 != 0) { |
| throw new Exception("Rollback should be intentionally triggered: count[" + getCount() + "]."); |
| } |
| } |
| |
| private void setCount(int count) { |
| this.count = count; |
| } |
| |
| public int getCount() { |
| return count; |
| } |
| |
| public String getErrorMessage() { |
| return errorMsg; |
| } |
| } |