com.alipay.sofa.ark.spi.replay.ReplayContext Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.alipay.sofa.ark.spi.replay;
import java.util.Stack;
/**
* @author qilong.zql 17/11/10-12:15
* @author guolei.sgl 19/7/21 16:48
*/
public class ReplayContext {
private static final ThreadLocal> moduleVersions = new ThreadLocal>() {
@Override
protected Stack initialValue() {
return new Stack<>();
}
};
public static final String PLACEHOLDER = "__call_placeholder__";
public static void set(String version) {
moduleVersions.get().push(version);
}
public static void unset() {
moduleVersions.get().pop();
}
public static String get() {
if (moduleVersions.get().size() == 0) {
return null;
}
return moduleVersions.get().peek();
}
public static void setPlaceHolder() {
// PLACEHOLDER needs to be placed when the link is currently invoked at the version number
if (moduleVersions.get().size() != 0) {
moduleVersions.get().push(PLACEHOLDER);
}
}
public static void clearPlaceHolder() {
if (PLACEHOLDER.equals(get())) {
moduleVersions.get().pop();
}
}
}