com.hazelcast.jet.impl.ProcessorClassLoaderTLHolder Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.jet.impl;
import java.util.HashMap;
import java.util.Map;
/**
* Thread local holder class for Processor class loaders
*
* This class is used to access processor class loader in deserialization code, where an object (typically metaSupplier,
* supplier or a processor instance) needs to be deserialized with processor classloader and there is no access to
* JobExecutionService, which manages the processor classloaders.
*
* The ThreadLocal
*/
public final class ProcessorClassLoaderTLHolder {
private static final ThreadLocal> CLASS_LOADERS = ThreadLocal.withInitial(HashMap::new);
private ProcessorClassLoaderTLHolder() {
}
public static ClassLoader get(String key) {
return CLASS_LOADERS.get().get(key);
}
static void putAll(Map map) {
CLASS_LOADERS.get().putAll(map);
}
static void remove() {
CLASS_LOADERS.remove();
}
}