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.activemq.store.amq; 018 019 import java.io.ByteArrayInputStream; 020 import java.io.InputStream; 021 import java.util.HashMap; 022 023 import org.apache.commons.collections.ExtendedProperties; 024 import org.apache.velocity.exception.ResourceNotFoundException; 025 import org.apache.velocity.runtime.RuntimeServices; 026 import org.apache.velocity.runtime.resource.Resource; 027 import org.apache.velocity.runtime.resource.loader.FileResourceLoader; 028 import org.apache.velocity.runtime.resource.loader.ResourceLoader; 029 030 public class CustomResourceLoader extends ResourceLoader { 031 032 private final static ThreadLocal<HashMap<String, String>> resourcesTL = new ThreadLocal<HashMap<String, String>>(); 033 private final FileResourceLoader fileResourceLoader = new FileResourceLoader(); 034 035 @Override 036 public void commonInit(RuntimeServices rs, ExtendedProperties configuration) { 037 super.commonInit(rs, configuration); 038 fileResourceLoader.commonInit(rs, configuration); 039 } 040 041 public void init( ExtendedProperties configuration) 042 { 043 fileResourceLoader.init(configuration); 044 } 045 046 /** 047 */ 048 public synchronized InputStream getResourceStream( String name ) 049 throws ResourceNotFoundException 050 { 051 InputStream result = null; 052 053 if (name == null || name.length() == 0) 054 { 055 throw new ResourceNotFoundException ("No template name provided"); 056 } 057 058 String value = null; 059 HashMap<String, String> resources = resourcesTL.get(); 060 if( resources!=null ) { 061 value = resources.get(name); 062 } 063 064 if( value == null ) { 065 result = this.fileResourceLoader.getResourceStream(name); 066 } else { 067 try 068 { 069 result = new ByteArrayInputStream(value.getBytes()); 070 } 071 catch( Exception e ) 072 { 073 throw new ResourceNotFoundException( e.getMessage() ); 074 } 075 } 076 return result; 077 } 078 079 public boolean isSourceModified(Resource resource) 080 { 081 return false; 082 } 083 084 public long getLastModified(Resource resource) 085 { 086 return 0; 087 } 088 089 static public HashMap<String, String> getResources() { 090 return resourcesTL.get(); 091 } 092 093 static public void setResources(HashMap<String, String> arg0) { 094 resourcesTL.set(arg0); 095 } 096 097 }