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 */ 017 package org.apache.camel.util; 018 019 import org.apache.camel.Endpoint; 020 import org.apache.camel.Exchange; 021 import org.apache.camel.PollingConsumer; 022 import org.apache.camel.Processor; 023 import org.apache.commons.logging.Log; 024 import org.apache.commons.logging.LogFactory; 025 026 /** 027 * Some helper methods for working with {@link Endpoint} instances 028 * 029 * @version $Revision: 69900 $ 030 */ 031 public final class EndpointHelper { 032 private static final transient Log LOG = LogFactory.getLog(EndpointHelper.class); 033 034 private EndpointHelper() { 035 //Utility Class 036 } 037 /** 038 * Creates a {@link PollingConsumer} and polls all pending messages on the endpoint 039 * and invokes the given {@link Processor} to process each {@link Exchange} and then closes 040 * down the consumer and throws any exceptions thrown. 041 */ 042 public static void pollEndpoint(Endpoint endpoint, Processor processor, long timeout) throws Exception { 043 PollingConsumer consumer = endpoint.createPollingConsumer(); 044 try { 045 consumer.start(); 046 047 while (true) { 048 Exchange exchange = consumer.receive(timeout); 049 if (exchange == null) { 050 break; 051 } else { 052 processor.process(exchange); 053 } 054 } 055 } finally { 056 try { 057 consumer.stop(); 058 } catch (Exception e) { 059 LOG.warn("Failed to stop PollingConsumer: " + e, e); 060 } 061 } 062 } 063 064 /** 065 * Creates a {@link PollingConsumer} and polls all pending messages on the 066 * endpoint and invokes the given {@link Processor} to process each 067 * {@link Exchange} and then closes down the consumer and throws any 068 * exceptions thrown. 069 */ 070 public static void pollEndpoint(Endpoint endpoint, Processor processor) throws Exception { 071 pollEndpoint(endpoint, processor, 1000L); 072 } 073 }