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