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 java.util.regex.PatternSyntaxException; 020 021 import org.apache.camel.Endpoint; 022 import org.apache.camel.Exchange; 023 import org.apache.camel.PollingConsumer; 024 import org.apache.camel.Processor; 025 import org.apache.commons.logging.Log; 026 import org.apache.commons.logging.LogFactory; 027 028 /** 029 * Some helper methods for working with {@link Endpoint} instances 030 * 031 * @version $Revision: 771248 $ 032 */ 033 public final class EndpointHelper { 034 035 private static final transient Log LOG = LogFactory.getLog(EndpointHelper.class); 036 037 private EndpointHelper() { 038 //Utility Class 039 } 040 /** 041 * Creates a {@link PollingConsumer} and polls all pending messages on the endpoint 042 * and invokes the given {@link Processor} to process each {@link Exchange} and then closes 043 * down the consumer and throws any exceptions thrown. 044 */ 045 public static void pollEndpoint(Endpoint endpoint, Processor processor, long timeout) throws Exception { 046 PollingConsumer consumer = endpoint.createPollingConsumer(); 047 try { 048 consumer.start(); 049 050 while (true) { 051 Exchange exchange = consumer.receive(timeout); 052 if (exchange == null) { 053 break; 054 } else { 055 processor.process(exchange); 056 } 057 } 058 } finally { 059 try { 060 consumer.stop(); 061 } catch (Exception e) { 062 LOG.warn("Failed to stop PollingConsumer: " + e, e); 063 } 064 } 065 } 066 067 /** 068 * Creates a {@link PollingConsumer} and polls all pending messages on the 069 * endpoint and invokes the given {@link Processor} to process each 070 * {@link Exchange} and then closes down the consumer and throws any 071 * exceptions thrown. 072 */ 073 public static void pollEndpoint(Endpoint endpoint, Processor processor) throws Exception { 074 pollEndpoint(endpoint, processor, 1000L); 075 } 076 077 /** 078 * Matches the endpoint with the given pattern. 079 * <p/> 080 * The match rules are applied in this order: 081 * <ul> 082 * <li>excact match, returns true</li> 083 * <li>wildcard match (pattern ends with a * and the uri starts with the pattern), returns true</li> 084 * <li>regular expression match, returns true</li> 085 * <li>otherwise returns false</li> 086 * </ul> 087 * 088 * @param uri the endpoint uri 089 * @param pattern a pattern to match 090 * @return <tt>true</tt> if match, <tt>false</tt> otherwise. 091 */ 092 public static boolean matchEndpoint(String uri, String pattern) { 093 if (uri.equals(pattern)) { 094 // excact match 095 return true; 096 } 097 098 // we have wildcard support in that hence you can match with: file* to match any file endpoints 099 if (pattern.endsWith("*") && uri.startsWith(pattern.substring(0, pattern.length() - 1))) { 100 return true; 101 } 102 103 // match by regular expression 104 try { 105 if (uri.matches(pattern)) { 106 return true; 107 } 108 } catch (PatternSyntaxException e) { 109 // ignore 110 } 111 112 // no match 113 return false; 114 } 115 116 }