/*
* 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.flink.streaming.connectors.db;
import java.io.IOException;
import java.net.InetSocketAddress;
import net.spy.memcached.MemcachedClient;
/**
* Interface to a Memcached key-value cache. It needs a running instance of Memcached.
*
* @see <a href="http://memcached.org/">http://memcached.org</a>
*
* @param <V>
* Type of value
*/
public class MemcachedState<V> implements DBState<String, V> {
private MemcachedClient memcached;
public MemcachedState() {
try {
memcached = new MemcachedClient(new InetSocketAddress("localhost", 11211));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public MemcachedState(String hostname, int portNum) {
try {
memcached = new MemcachedClient(new InetSocketAddress(hostname, portNum));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public void close() {
memcached.shutdown();
}
@Override
public void put(String key, V value) {
memcached.set(key, 0, value);
}
@Override
@SuppressWarnings("unchecked")
public V get(String key) {
return (V) memcached.get(key);
}
@Override
public void remove(String key) {
memcached.delete(key.toString());
}
}