001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.processor.saga; 018 019import org.apache.camel.AsyncCallback; 020import org.apache.camel.CamelContext; 021import org.apache.camel.CamelExchangeException; 022import org.apache.camel.Exchange; 023import org.apache.camel.Processor; 024import org.apache.camel.model.SagaCompletionMode; 025import org.apache.camel.saga.CamelSagaCoordinator; 026import org.apache.camel.saga.CamelSagaService; 027import org.apache.camel.saga.CamelSagaStep; 028 029/** 030 * Saga processor implementing the NEVER propagation mode. 031 */ 032public class NeverSagaProcessor extends SagaProcessor { 033 034 public NeverSagaProcessor(CamelContext camelContext, Processor childProcessor, CamelSagaService sagaService, SagaCompletionMode completionMode, CamelSagaStep step) { 035 super(camelContext, childProcessor, sagaService, completionMode, step); 036 if (!step.isEmpty()) { 037 throw new IllegalArgumentException("Saga configuration is not allowed when propagation is set to NEVER"); 038 } 039 if (completionMode != null && completionMode != SagaCompletionMode.defaultCompletionMode()) { 040 throw new IllegalArgumentException("CompletionMode cannot be specified when propagation is NEVER"); 041 } 042 } 043 044 @Override 045 public boolean process(Exchange exchange, AsyncCallback callback) { 046 getCurrentSagaCoordinator(exchange).whenComplete((coordinator, ex) -> ifNotException(ex, exchange, callback, () -> { 047 if (coordinator != null) { 048 exchange.setException(new CamelExchangeException("Route cannot handle exchanges that are joining a saga", exchange)); 049 callback.done(false); 050 } else { 051 super.process(exchange, doneSync -> callback.done(false)); 052 } 053 })); 054 return false; 055 } 056}