com.qq.tars.context.impl.DistributedContextImpl Maven / Gradle / Ivy
/**
* Tencent is pleased to support the open source community by making Tars available.
*
* Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved.
*
* Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*
* 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.qq.tars.context.impl;
import java.util.Map;
import java.util.Set;
import com.qq.tars.context.DistributedContext;
public class DistributedContextImpl implements DistributedContext {
private static ThreadLocal contexts = new ThreadLocal() {
protected ContextItem initialValue() {
return new ContextItem();
}
};
public void clear() {
contexts.remove();
}
@SuppressWarnings("unchecked")
public T get(String name) {
try {
ContextItem item = getItem();
Object value = item.getAttribute(name);
return value != null ? (T)value : null;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public Set keySet() {
return getItem().getMap().keySet();
}
public void put(String name, T value) {
getItem().setAttribute(name, value);
}
public int size() {
return getItem().getMap().size();
}
private ContextItem getItem() {
ContextItem item = contexts.get();
if (item == null) {
item = new ContextItem();
contexts.set(item);
}
return item;
}
public Map getAttrbuites() {
return getItem().getMap();
}
}