/*
* 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 com.alibaba.jstorm.cache.memory;
import backtype.storm.state.Serializer;
import backtype.storm.task.TopologyContext;
import com.alibaba.jstorm.cache.IKvStore;
import com.alibaba.jstorm.cache.IKvStoreManager;
import com.google.common.collect.Maps;
import java.io.IOException;
import java.util.Map;
/**
* For testing purpose, so ttl and stateful kv store are not supported.
*/
public class InMemoryKvStoreManagerFactory {
private static Map<String, Manager> storeManangers = Maps.newHashMap();
public static IKvStoreManager getManager(String storeName) {
synchronized (InMemoryKvStoreManagerFactory.class) {
Manager instance = storeManangers.get(storeName);
if (instance == null) {
instance = new Manager();
storeManangers.put(storeName, instance);
}
return instance;
}
}
private static class Manager implements IKvStoreManager<Object> {
private Map<String, IKvStore> idToKvStore;
public Manager() {
idToKvStore = Maps.newHashMap();
}
@Override
public <K, V> IKvStore<K, V> getOrCreate(String kvStoreId) throws IOException {
IKvStore<K, V> kvStore = null;
synchronized (idToKvStore) {
if (idToKvStore.containsKey(kvStoreId)) {
kvStore = idToKvStore.get(kvStoreId);
} else {
kvStore = new InMemoryKvStore<K, V>();
idToKvStore.put(kvStoreId, kvStore);
}
}
return kvStore;
}
public void close() {
idToKvStore.clear();
}
@Override
public void restore(Object checkpoint) {
// Do nothing
}
@Override
public String backup(long checkpointId) {
// Do nothing
return null;
}
@Override
public void checkpoint(long checkpointId) {
// Do nothing
}
@Override
public void remove(long checkpointId) {
// Do nothing
}
@Override
public void initMonitor(TopologyContext context) {
// Do nothing
}
}
}