| /* |
| * Copyright 2014 Paul Merlin. |
| * |
| * Licensed 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.zest.cache.memcache; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| 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.zest.api.common.Optional; |
| import org.apache.zest.api.configuration.Configuration; |
| import org.apache.zest.api.injection.scope.This; |
| import org.apache.zest.spi.cache.Cache; |
| |
| import static org.apache.zest.api.util.NullArgumentException.validateNotEmpty; |
| |
| /** |
| * Memcache CachePool Mixin. |
| */ |
| public class MemcachePoolMixin |
| implements MemcachePoolService |
| { |
| private final Map<String, MemcacheImpl<?>> caches = new HashMap<>(); |
| @This @Optional |
| private Configuration<MemcacheConfiguration> configuration; |
| private MemcachedClient client; |
| private int expiration; |
| |
| @Override |
| public void activateService() |
| throws Exception |
| { |
| if( configuration != null ) |
| { |
| 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() ) |
| { |
| builder.setAuthDescriptor( |
| new AuthDescriptor( |
| new String[] |
| { |
| authMech |
| }, |
| new PlainCallbackHandler( username, password ) |
| ) |
| ); |
| } |
| |
| 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 ) |
| { |
| validateNotEmpty( "cacheId", cacheId ); |
| synchronized( caches ) |
| { |
| MemcacheImpl<?> cache = caches.get( cacheId ); |
| if( cache == null ) |
| { |
| cache = new MemcacheImpl<>( client, cacheId, valueType, expiration ); |
| caches.put( cacheId, cache ); |
| } |
| 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() ); |
| } |
| } |
| } |
| } |