| /** |
| * 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.datatorrent.contrib.memcache_whalin; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.whalin.MemCached.MemCachedClient; |
| import com.whalin.MemCached.SockIOPool; |
| |
| import com.datatorrent.lib.db.KeyValueStore; |
| |
| /** |
| * Provides the implementation of a Memcache store. |
| * |
| * @since 0.9.3 |
| */ |
| public class MemcacheStore implements KeyValueStore |
| { |
| private static final Logger LOG = LoggerFactory.getLogger(MemcacheStore.class); |
| protected transient MemCachedClient memcacheClient; |
| protected transient SockIOPool pool; |
| private List<String> serverAddresses = new ArrayList<String>(); |
| protected int keyExpiryTime = 0; |
| |
| /** |
| * Adds a server address |
| * |
| * @param addr the address |
| */ |
| public void addServer(InetSocketAddress addr) |
| { |
| serverAddresses.add(addr.getHostName() + ":" + addr.getPort()); |
| } |
| |
| /** |
| * Gets the key expiry time. |
| * |
| * @return The key expiry time. |
| */ |
| public int getKeyExpiryTime() |
| { |
| return keyExpiryTime; |
| } |
| |
| /** |
| * Sets the key expiry time. |
| * |
| * @param keyExpiryTime |
| */ |
| public void setKeyExpiryTime(int keyExpiryTime) |
| { |
| this.keyExpiryTime = keyExpiryTime; |
| } |
| |
| @Override |
| public void connect() throws IOException |
| { |
| pool = SockIOPool.getInstance(); |
| if (serverAddresses.isEmpty()) { |
| pool.setServers(new String[]{"localhost:11211"}); |
| } |
| else { |
| pool.setServers(serverAddresses.toArray(new String[] {})); |
| } |
| pool.initialize(); |
| memcacheClient = new MemCachedClient(); |
| } |
| |
| @Override |
| public void disconnect() throws IOException |
| { |
| pool.shutDown(); |
| } |
| |
| @Override |
| public boolean isConnected() |
| { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| |
| /** |
| * Gets the value given the key. |
| * Note that it does NOT work with hash values or list values |
| * |
| * @param key |
| * @return The value. |
| */ |
| @Override |
| public Object get(Object key) |
| { |
| return memcacheClient.get(key.toString()); |
| } |
| |
| /** |
| * Gets all the values given the keys. |
| * Note that it does NOT work with hash values or list values |
| * |
| * @param keys |
| * @return All values for the given keys. |
| */ |
| @SuppressWarnings("unchecked") |
| @Override |
| public List<Object> getAll(List<Object> keys) |
| { |
| List<Object> results = new ArrayList<Object>(); |
| for (Object key : keys) { |
| results.add(memcacheClient.get(key.toString())); |
| } |
| return results; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void put(Object key, Object value) |
| { |
| try { |
| memcacheClient.set(key.toString(), value, keyExpiryTime); |
| } |
| catch (Exception ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| |
| @Override |
| public void putAll(Map<Object, Object> m) |
| { |
| for (Map.Entry<Object, Object> entry : m.entrySet()) { |
| memcacheClient.set(entry.getKey().toString(), entry.getValue(), keyExpiryTime); |
| } |
| } |
| |
| @Override |
| public void remove(Object key) |
| { |
| memcacheClient.delete(key.toString()); |
| } |
| |
| } |