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.processor.cache;
018
019 import java.io.InputStream;
020
021 import net.sf.ehcache.CacheManager;
022 import net.sf.ehcache.Ehcache;
023
024 import org.apache.camel.Exchange;
025 import org.apache.camel.Processor;
026 import org.apache.camel.component.cache.factory.CacheManagerFactory;
027 import org.apache.camel.converter.IOConverter;
028 import org.apache.camel.util.ObjectHelper;
029 import org.apache.commons.logging.Log;
030 import org.apache.commons.logging.LogFactory;
031
032 public class CacheBasedTokenReplacer extends CacheValidate implements Processor {
033 private static final transient Log LOG = LogFactory.getLog(CacheBasedTokenReplacer.class);
034 private String cacheName;
035 private String key;
036 private String replacementToken;
037 private CacheManager cacheManager;
038 private Ehcache cache;
039
040 public CacheBasedTokenReplacer(String cacheName, String key, String replacementToken) {
041 super();
042 if (cacheName.contains("cache://")) {
043 this.setCacheName(cacheName.replace("cache://", ""));
044 } else {
045 this.setCacheName(cacheName);
046 }
047 this.setKey(key);
048 this.setReplacementToken(replacementToken);
049 }
050
051 public void process(Exchange exchange) throws Exception {
052 // Cache the buffer to the specified Cache against the specified key
053 cacheManager = new CacheManagerFactory().instantiateCacheManager();
054
055 if (isValid(cacheManager, cacheName, key)) {
056 cache = cacheManager.getCache(cacheName);
057
058 if (LOG.isDebugEnabled()) {
059 LOG.debug("Replacing Token " + replacementToken + "in Message with value stored against key "
060 + key + " in CacheName " + cacheName);
061 }
062 exchange.getIn().setHeader("CACHE_KEY", key);
063
064 Object body = exchange.getIn().getBody();
065 InputStream is = exchange.getContext().getTypeConverter().convertTo(InputStream.class, body);
066 byte[] buffer;
067 try {
068 buffer = IOConverter.toBytes(is);
069 } finally {
070 ObjectHelper.close(is, "is", LOG);
071 }
072
073 // Note: The value in the cache must be a String
074 String cacheValue = exchange.getContext().getTypeConverter()
075 .convertTo(String.class, cache.get(key).getObjectValue());
076 String replacedTokenString = new String(buffer).replaceAll(replacementToken, cacheValue);
077
078 if (LOG.isTraceEnabled()) {
079 LOG.trace("replacedTokenString = " + replacedTokenString);
080 }
081 exchange.getIn().setBody(replacedTokenString.getBytes());
082 }
083 }
084
085 public String getCacheName() {
086 return cacheName;
087 }
088
089 public void setCacheName(String cacheName) {
090 this.cacheName = cacheName;
091 }
092
093 public String getKey() {
094 return key;
095 }
096
097 public void setKey(String key) {
098 this.key = key;
099 }
100
101 public String getReplacementToken() {
102 return replacementToken;
103 }
104
105 public void setReplacementToken(String replacementToken) {
106 this.replacementToken = replacementToken;
107 }
108
109 }