mirror of
https://github.com/Rogiel/l2jserver2
synced 2025-12-05 23:22:47 +00:00
Implements GuavaCacheService as default service implementation
This commit is contained in:
206
l2jserver2-common/src/main/java/com/l2jserver/service/cache/GuavaCacheService.java
vendored
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206
l2jserver2-common/src/main/java/com/l2jserver/service/cache/GuavaCacheService.java
vendored
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/*
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* This file is part of l2jserver2 <l2jserver2.com>.
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*
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* l2jserver2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* l2jserver2 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with l2jserver2. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.service.cache;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.Proxy;
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import java.util.Iterator;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.google.common.base.Preconditions;
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import com.google.common.cache.CacheBuilder;
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import com.google.common.cache.CacheLoader;
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import com.l2jserver.service.AbstractService;
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import com.l2jserver.service.ServiceStartException;
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import com.l2jserver.service.ServiceStopException;
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/**
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* Simple cache that stores invocation results in a Google Guava
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* {@link com.google.common.cache.Cache Cache}.
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*
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* @author <a href="http://www.rogiel.com">Rogiel</a>
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*/
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public class GuavaCacheService extends AbstractService implements CacheService {
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/**
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* The logger
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*/
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private final Logger log = LoggerFactory.getLogger(this.getClass());
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/**
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* The interface cache
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*/
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private Cache<MethodInvocation, Object> interfaceCache;
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@Override
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protected void doStart() throws ServiceStartException {
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interfaceCache = createCache("interface-cache");
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}
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@Override
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public <T extends Cacheable> T decorate(final Class<T> interfaceType,
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final T instance) {
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Preconditions.checkNotNull(interfaceType, "interfaceType");
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Preconditions.checkNotNull(instance, "instance");
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Preconditions.checkArgument(interfaceType.isInterface(),
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"interfaceType is not an interface");
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log.debug("Decorating {} with cache", interfaceType);
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@SuppressWarnings("unchecked")
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final T proxy = (T) Proxy.newProxyInstance(this.getClass()
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.getClassLoader(), new Class[] { interfaceType },
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new InvocationHandler() {
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@Override
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public Object invoke(Object proxy, Method method,
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Object[] args) throws Throwable {
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if (method.isAnnotationPresent(IgnoreCaching.class))
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return method.invoke(instance, args);
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final MethodInvocation invocation = new MethodInvocation(
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method, args);
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Object result = interfaceCache.get(invocation);
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if (result == null)
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return doInvoke(invocation, proxy, method, args);
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return result;
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}
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private Object doInvoke(MethodInvocation invocation,
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Object proxy, Method method, Object[] args)
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throws IllegalArgumentException,
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IllegalAccessException, InvocationTargetException {
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Object result = method.invoke(instance, args);
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interfaceCache.put(invocation, result);
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return result;
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}
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});
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return proxy;
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}
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@Override
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public <K, V> Cache<K, V> createCache(String name, int size) {
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Preconditions.checkNotNull(name, "name");
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Preconditions.checkArgument(size > 0, "size <= 0");
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log.debug("Creating cache {} with minimum size of {}", name, size);
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com.google.common.cache.LoadingCache<K, V> cache = CacheBuilder
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.newBuilder().maximumSize(size).build(new CacheLoader<K, V>() {
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@Override
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public V load(K key) throws Exception {
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throw new Exception("Key is not bounded to any value");
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}
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});
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return new GuavaCacheFacade<K, V>(cache);
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}
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@Override
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public <K, V> Cache<K, V> createEternalCache(String name, int size) {
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Preconditions.checkNotNull(name, "name");
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Preconditions.checkArgument(size > 0, "size <= 0");
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log.debug("Creating eternal cache {} with minimum size of {}", name,
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size);
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com.google.common.cache.LoadingCache<K, V> cache = CacheBuilder
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.newBuilder().maximumSize(Integer.MAX_VALUE)
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.build(new CacheLoader<K, V>() {
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@Override
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public V load(K key) throws Exception {
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throw new Exception("Key is not bounded to any value");
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}
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});
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return new GuavaCacheFacade<K, V>(cache);
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}
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@Override
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public <K, V> Cache<K, V> createCache(String name) {
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return createCache(name, 200);
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}
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@Override
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public <K, V> void dispose(Cache<K, V> cache) {
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if (cache instanceof GuavaCacheFacade) {
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log.debug("Disposing cache {}", cache);
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((GuavaCacheFacade<K, V>) cache).cache.invalidateAll();
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} else {
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log.warn("Trying to dispose {} cache when it is not EhCacheFacade type");
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}
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}
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@Override
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protected void doStop() throws ServiceStopException {
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interfaceCache = null;
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}
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/**
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* {@link net.sf.ehcache.Cache EhCache} facade
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*
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* @author <a href="http://www.rogiel.com">Rogiel</a>
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*
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* @param <K>
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* the key type
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* @param <V>
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* the value type
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*/
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private class GuavaCacheFacade<K, V> implements Cache<K, V> {
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/**
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* The backing cache
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*/
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private final com.google.common.cache.LoadingCache<K, V> cache;
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/**
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* @param cache
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* the backing cache
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*/
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public GuavaCacheFacade(com.google.common.cache.LoadingCache<K, V> cache) {
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this.cache = cache;
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}
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@Override
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public void put(K key, V value) {
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cache.put(key, value);
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}
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@Override
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public V get(K key) {
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return cache.getIfPresent(key);
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}
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@Override
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public boolean contains(K key) {
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return cache.getIfPresent(key) != null;
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}
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@Override
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public void remove(K key) {
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cache.invalidate(key);
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}
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@Override
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public void clear() {
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cache.invalidateAll();
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}
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@Override
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public Iterator<V> iterator() {
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return null;
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}
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}
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}
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@@ -36,7 +36,7 @@
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<service interface="com.l2jserver.service.configuration.ConfigurationService"
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implementation="com.l2jserver.service.configuration.XMLConfigurationService" />
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<service interface="com.l2jserver.service.cache.CacheService"
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implementation="com.l2jserver.service.cache.SoftCacheService" />
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implementation="com.l2jserver.service.cache.GuavaCacheService" />
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<service interface="com.l2jserver.service.core.logging.LoggingService"
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implementation="com.l2jserver.service.core.logging.Log4JLoggingService">
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<logger name="" level="ERROR" />
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@@ -47,7 +47,7 @@
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<service interface="com.l2jserver.service.configuration.ConfigurationService"
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implementation="com.l2jserver.service.configuration.XMLConfigurationService" />
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<service interface="com.l2jserver.service.cache.CacheService"
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implementation="com.l2jserver.service.cache.SoftCacheService" />
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implementation="com.l2jserver.service.cache.GuavaCacheService" />
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<service interface="com.l2jserver.service.core.logging.LoggingService"
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implementation="com.l2jserver.service.core.logging.Log4JLoggingService">
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<logger name="" level="ERROR" />
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@@ -36,7 +36,7 @@
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<service interface="com.l2jserver.service.configuration.ConfigurationService"
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implementation="com.l2jserver.service.configuration.XMLConfigurationService" />
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<service interface="com.l2jserver.service.cache.CacheService"
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implementation="com.l2jserver.service.cache.SoftCacheService" />
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implementation="com.l2jserver.service.cache.GuavaCacheService" />
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<service interface="com.l2jserver.service.core.logging.LoggingService"
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implementation="com.l2jserver.service.core.logging.Log4JLoggingService">
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<logger name="" level="ERROR" />
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@@ -47,7 +47,7 @@
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<service interface="com.l2jserver.service.configuration.ConfigurationService"
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implementation="com.l2jserver.service.configuration.XMLConfigurationService" />
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<service interface="com.l2jserver.service.cache.CacheService"
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implementation="com.l2jserver.service.cache.SoftCacheService" />
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implementation="com.l2jserver.service.cache.GuavaCacheService" />
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<service interface="com.l2jserver.service.core.logging.LoggingService"
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implementation="com.l2jserver.service.core.logging.Log4JLoggingService">
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<logger name="" level="ERROR" />
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