/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.kaha.impl.index;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.activemq.kaha.Marshaller;
import org.apache.activemq.kaha.StoreEntry;
import org.apache.activemq.kaha.impl.container.MapContainerImpl;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Index implementation using a HashMap
*
* @version $Revision: 1.2 $
*/
public class VMIndex implements Index {
private static final Log LOG = LogFactory.getLog(VMIndex.class);
private IndexManager indexManager;
private Map<Object, StoreEntry> map = new HashMap<Object, StoreEntry>();
public VMIndex(IndexManager manager) {
this.indexManager = manager;
}
/**
*
* @see org.apache.activemq.kaha.impl.index.Index#clear()
*/
public void clear() {
map.clear();
}
/**
* @param key
* @return true if the index contains the key
* @see org.apache.activemq.kaha.impl.index.Index#containsKey(java.lang.Object)
*/
public boolean containsKey(Object key) {
return map.containsKey(key);
}
/**
* @param key
* @return store entry
* @see org.apache.activemq.kaha.impl.index.Index#removeKey(java.lang.Object)
*/
public StoreEntry remove(Object key) {
StoreEntry result = map.remove(key);
if (result != null) {
try {
result = indexManager.refreshIndex((IndexItem)result);
} catch (IOException e) {
LOG.error("Failed to refresh entry", e);
throw new RuntimeException("Failed to refresh entry");
}
}
return result;
}
/**
* @param key
* @param entry
* @see org.apache.activemq.kaha.impl.index.Index#store(java.lang.Object,
* org.apache.activemq.kaha.impl.index.IndexItem)
*/
public void store(Object key, StoreEntry entry) {
map.put(key, entry);
}
/**
* @param key
* @return the entry
*/
public StoreEntry get(Object key) {
StoreEntry result = map.get(key);
if (result != null) {
try {
result = indexManager.refreshIndex((IndexItem)result);
} catch (IOException e) {
LOG.error("Failed to refresh entry", e);
throw new RuntimeException("Failed to refresh entry");
}
}
return result;
}
/**
* @return true if the index is transient
*/
public boolean isTransient() {
return true;
}
/**
* load indexes
*/
public void load() {
}
/**
* unload indexes
*/
public void unload() {
map.clear();
}
public void setKeyMarshaller(Marshaller marshaller) {
}
}