| /* |
| * 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.polygene.cache.memcache; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import net.spy.memcached.AddrUtil; |
| import net.spy.memcached.ConnectionFactoryBuilder; |
| import net.spy.memcached.ConnectionFactoryBuilder.Protocol; |
| import net.spy.memcached.MemcachedClient; |
| import net.spy.memcached.auth.AuthDescriptor; |
| import net.spy.memcached.auth.PlainCallbackHandler; |
| import org.apache.polygene.api.configuration.Configuration; |
| import org.apache.polygene.api.injection.scope.This; |
| import org.apache.polygene.spi.cache.Cache; |
| |
| /** |
| * Memcache CachePool Mixin. |
| */ |
| public class MemcachePoolMixin |
| implements MemcachePoolService |
| { |
| private final Map<String, MemcacheImpl<?>> caches = new HashMap<>(); |
| |
| @This |
| private Configuration<MemcacheConfiguration> configuration; |
| |
| private MemcachedClient client; |
| private int expiration; |
| |
| @Override |
| public void activateService() |
| throws Exception |
| { |
| MemcacheConfiguration config = configuration.get(); |
| expiration = ( config.expiration().get() == null ) |
| ? 3600 |
| : config.expiration().get(); |
| String addresses = ( config.addresses().get() == null ) |
| ? "localhost:11211" |
| : config.addresses().get(); |
| Protocol protocol = ( config.protocol().get() == null ) |
| ? Protocol.TEXT |
| : Protocol.valueOf( config.protocol().get().toUpperCase() ); |
| String username = config.username().get(); |
| String password = config.password().get(); |
| String authMech = config.authMechanism().get() == null |
| ? "PLAIN" |
| : config.authMechanism().get(); |
| |
| ConnectionFactoryBuilder builder = new ConnectionFactoryBuilder(); |
| builder.setProtocol( protocol ); |
| if( username != null && !username.isEmpty() ) |
| { |
| String[] authType = { authMech }; |
| AuthDescriptor to = new AuthDescriptor( authType, new PlainCallbackHandler( username, password ) ); |
| builder.setAuthDescriptor( to ); |
| } |
| |
| client = new MemcachedClient( builder.build(), AddrUtil.getAddresses( addresses ) ); |
| } |
| |
| @Override |
| public void passivateService() |
| throws Exception |
| { |
| if( client != null ) |
| { |
| client.shutdown(); |
| } |
| } |
| |
| @Override |
| @SuppressWarnings( "unchecked" ) |
| public <T> Cache<T> fetchCache( String cacheId, Class<T> valueType ) |
| { |
| Objects.requireNonNull( cacheId, "cacheId" ); |
| if( cacheId.isEmpty() ) |
| { |
| throw new IllegalArgumentException( "cacheId was empty string" ); |
| } |
| synchronized( caches ) |
| { |
| MemcacheImpl<?> cache = caches.computeIfAbsent( cacheId, identity -> new MemcacheImpl<>( client, identity, valueType, expiration ) ); |
| cache.incRefCount(); |
| return (Cache<T>) cache; |
| } |
| } |
| |
| @Override |
| public void returnCache( Cache<?> cache ) |
| { |
| MemcacheImpl<?> memcache = (MemcacheImpl<?>) cache; |
| memcache.decRefCount(); |
| synchronized( caches ) |
| { |
| if( memcache.isNotUsed() ) |
| { |
| caches.remove( memcache.cacheId() ); |
| } |
| } |
| } |
| } |