ArtifactHolderStore.java
/*
* Copyright (c) 2019, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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 org.apache.synapse.aspects.flow.statistics.opentracing.stores;
import org.apache.synapse.aspects.flow.statistics.data.artifact.ArtifactHolder;
import org.apache.synapse.aspects.flow.statistics.structuring.StructuringElement;
import java.util.Stack;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* Maintains the unique names of synapse configurations, and serves them when needed for parenting when applicable.
* An artifact holder's structuring element stack represents the complete path from child to parent.
*/
public class ArtifactHolderStore {
private static ConcurrentMap<String, Stack<StructuringElement>> structuringElementStacks =
new ConcurrentHashMap<>();
/**
* Prevents Instantiation.
*/
private ArtifactHolderStore() {}
/**
* Adds a deep clone of the provided artifact holder's structuring element stack,
* in order to keep track of parents for serving when necessary.
* @param componentUniqueId Unique id of the component.
* @param artifactHolderReference Artifact holder object.
*/
public static synchronized void addStructuringElementStack(String componentUniqueId,
ArtifactHolder artifactHolderReference) {
if (artifactHolderReference != null) {
Stack<StructuringElement> stackCopy = getCopiedStack(componentUniqueId, artifactHolderReference.getStack());
structuringElementStacks.put(componentUniqueId, stackCopy);
}
}
/**
* Gets the structuring element stack, that is denoted with the given unique component id.
* @param componentUniqueId Unique component id.
* @return Structuring Elements stack denoted by the given component uniq id,
* which contains the path from child to the parent.
*/
public static Stack<StructuringElement> getStructuringElementStack(String componentUniqueId) {
if (componentUniqueId != null) {
return structuringElementStacks.get(componentUniqueId);
}
return null;
}
private static Stack<StructuringElement> getCopiedStack(String componentUniqueId, Stack<StructuringElement> stack) {
Stack<StructuringElement> stackCopy = new Stack<>();
if (structuringElementStacks.containsKey(componentUniqueId)) {
// Get the existing stack, which is already a copy
stackCopy = structuringElementStacks.get(componentUniqueId);
}
if (stack != null) {
for (StructuringElement structuringElement : stack) {
stackCopy.push(structuringElement);
}
}
return stackCopy;
}
}