ebfc4513e0
Please note that the build will fail at the moment due to various checkstyle violations which should be fixed soon
94 lines
3.8 KiB
Java
94 lines
3.8 KiB
Java
/*
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* Copyright 2011 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.serialization;
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import java.lang.ref.Reference;
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import java.util.HashMap;
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import java.util.concurrent.ConcurrentHashMap;
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public final class ClassResolvers {
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/**
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* cache disabled
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* @param classLoader - specific classLoader to use, or null if you want to revert to default
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* @return new instance of class resolver
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*/
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public static ClassResolver cacheDisabled(ClassLoader classLoader) {
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return new ClassLoaderClassResolver(defaultClassLoader(classLoader));
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}
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/**
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* non-agressive non-concurrent cache
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* good for non-shared default cache
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*
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* @param classLoader - specific classLoader to use, or null if you want to revert to default
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* @return new instance of class resolver
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*/
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public static ClassResolver weakCachingResolver(ClassLoader classLoader) {
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return new CachingClassResolver(new ClassLoaderClassResolver(defaultClassLoader(classLoader)), new WeakReferenceMap<String, Class<?>>(new HashMap<String, Reference<Class<?>>>()));
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}
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/**
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* agressive non-concurrent cache
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* good for non-shared cache, when we're not worried about class unloading
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*
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* @param classLoader - specific classLoader to use, or null if you want to revert to default
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* @return new instance of class resolver
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*/
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public static ClassResolver softCachingResolver(ClassLoader classLoader) {
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return new CachingClassResolver(new ClassLoaderClassResolver(defaultClassLoader(classLoader)), new SoftReferenceMap<String, Class<?>>(new HashMap<String, Reference<Class<?>>>()));
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}
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/**
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* non-agressive concurrent cache
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* good for shared cache, when we're worried about class unloading
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*
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* @param classLoader - specific classLoader to use, or null if you want to revert to default
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* @return new instance of class resolver
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*/
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public static ClassResolver weakCachingConcurrentResolver(ClassLoader classLoader) {
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return new CachingClassResolver(new ClassLoaderClassResolver(defaultClassLoader(classLoader)), new WeakReferenceMap<String, Class<?>>(new ConcurrentHashMap<String, Reference<Class<?>>>()));
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}
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/**
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* agressive concurrent cache
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* good for shared cache, when we're not worried about class unloading
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*
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* @param classLoader - specific classLoader to use, or null if you want to revert to default
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* @return new instance of class resolver
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*/
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public static ClassResolver softCachingConcurrentResolver(ClassLoader classLoader) {
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return new CachingClassResolver(new ClassLoaderClassResolver(defaultClassLoader(classLoader)), new SoftReferenceMap<String, Class<?>>(new ConcurrentHashMap<String, Reference<Class<?>>>()));
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}
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static ClassLoader defaultClassLoader(ClassLoader classLoader) {
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if (classLoader != null) {
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return classLoader;
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}
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final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
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if (contextClassLoader != null) {
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return contextClassLoader;
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}
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return ClassResolvers.class.getClassLoader();
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}
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private ClassResolvers() {
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// Unused
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}
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}
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