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/*
* Copyright (c) 2005-2011, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.hazelcast;
import com.hazelcast.core.EntryEvent;
import com.hazelcast.core.EntryListener;
import com.hazelcast.core.HazelcastException;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.map.IMap;
import com.hazelcast.map.MapEvent;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.caching.impl.DistributedMapProvider;
import org.wso2.carbon.caching.impl.MapEntryListener;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
public class HazelcastDistributedMapProvider implements DistributedMapProvider {
private static final Log log = LogFactory.getLog(HazelcastDistributedMapProvider.class);
private HazelcastInstance hazelcastInstance;
private Map maps = new HashMap();
public HazelcastDistributedMapProvider(HazelcastInstance hazelcastInstance) {
this.hazelcastInstance = hazelcastInstance;
}
@Override
public Map getMap(String mapName, final MapEntryListener entryListener) {
DistMap map = maps.get(mapName);
if(map == null){
map = new DistMap(mapName, entryListener);
maps.put(mapName, map);
}
return map;
}
@Override
public void removeMap(String mapName) {
DistMap map = maps.get(mapName);
try {
if(map != null) {
hazelcastInstance.getMap(mapName).removeEntryListener(UUID.fromString(map.getListenerId()));
}
maps.remove(mapName);
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
}
private class DistMap implements Map {
private IMap map;
private UUID listenerId;
public DistMap(String mapName, final MapEntryListener entryListener) {
try {
this.map = hazelcastInstance.getMap(mapName);
if (entryListener != null) {
listenerId = map.addEntryListener(new EntryListener() {
@Override
public void entryExpired(EntryEvent entryEvent) {
}
@Override
public void entryAdded(EntryEvent kvEntryEvent) {
if (!kvEntryEvent.getMember().equals(hazelcastInstance.getCluster().getLocalMember())) {
entryListener.entryAdded(kvEntryEvent.getKey());
}
}
@Override
public void entryRemoved(EntryEvent kvEntryEvent) {
if (!kvEntryEvent.getMember().equals(hazelcastInstance.getCluster().getLocalMember())) {
entryListener.entryRemoved(kvEntryEvent.getKey());
}
}
@Override
public void entryUpdated(EntryEvent kvEntryEvent) {
if (!kvEntryEvent.getMember().equals(hazelcastInstance.getCluster().getLocalMember())) {
entryListener.entryUpdated(kvEntryEvent.getKey());
}
}
@Override
public void entryEvicted(EntryEvent kvEntryEvent) {
if (!kvEntryEvent.getMember().equals(hazelcastInstance.getCluster().getLocalMember())) {
entryListener.entryRemoved(kvEntryEvent.getKey());
}
}
@Override
public void mapEvicted(MapEvent mapEvent) {
map.evictAll();
}
@Override
public void mapCleared(MapEvent mapEvent) {
if (!mapEvent.getMember().equals(hazelcastInstance.getCluster().getLocalMember())) {
entryListener.mapCleared();
}
}
}, false);
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
}
@Override
public int size() {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
return map.size();
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return 0;
}
@Override
public boolean isEmpty() {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
return map.isEmpty();
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return true;
}
@Override
public boolean containsKey(Object key) {
try {
return hazelcastInstance.getLifecycleService().isRunning() && map.containsKey(key);
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return false;
}
@Override
public boolean containsValue(Object value) {
try {
return hazelcastInstance.getLifecycleService().isRunning() && map.containsValue(value);
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return false;
}
@Override
public V get(Object key) {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
return map.get(key);
}
} catch (HazelcastException | NullPointerException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return null;
}
@Override
public V put(K key, V value) {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
map.set(key, value);
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return value;
}
@Override
public V remove(Object key) {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
map.remove((K)key);
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return null;
}
@Override
public void putAll(Map m) {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
map.putAll(m);
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
}
@Override
public void clear() {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
map.clear();
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
}
@Override
public Set keySet() {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
return map.keySet();
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return new LinkedHashSet();
}
@Override
public Collection values() {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
return map.values();
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return new ArrayList();
}
@Override
public Set> entrySet() {
try {
if (hazelcastInstance.getLifecycleService().isRunning()) {
return map.entrySet();
}
} catch (HazelcastException e) {
log.warn("Cache lookup failed. Falling back to normal path.", e);
}
return new LinkedHashSet>();
}
public String getListenerId() {
return listenerId.toString();
}
}
}