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 }