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.Exchange; 022import org.apache.camel.Processor; 023import org.apache.camel.model.SagaCompletionMode; 024import org.apache.camel.saga.CamelSagaService; 025import org.apache.camel.saga.CamelSagaStep; 026 027/** 028 * Saga processor implementing the SUPPORTS propagation mode. 029 */ 030public class SupportsSagaProcessor extends SagaProcessor { 031 032 public SupportsSagaProcessor(CamelContext camelContext, Processor childProcessor, CamelSagaService sagaService, SagaCompletionMode completionMode, CamelSagaStep step) { 033 super(camelContext, childProcessor, sagaService, completionMode, step); 034 if (completionMode != null && completionMode != SagaCompletionMode.defaultCompletionMode()) { 035 throw new IllegalArgumentException("CompletionMode cannot be specified when propagation is SUPPORTS"); 036 } 037 } 038 039 @Override 040 public boolean process(Exchange exchange, AsyncCallback callback) { 041 getCurrentSagaCoordinator(exchange).whenComplete((coordinator, ex) -> ifNotException(ex, exchange, callback, () -> { 042 if (coordinator != null) { 043 coordinator.beginStep(exchange, step).whenComplete((done, ex2) -> ifNotException(ex2, exchange, callback, () -> { 044 // Never completes the saga 045 super.process(exchange, doneSync -> callback.done(false)); 046 })); 047 } else { 048 super.process(exchange, doneSync -> callback.done(false)); 049 } 050 })); 051 return false; 052 } 053}