LatestActiveParentResolver.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.tracing.opentelemetry.management.parentresolving;
import org.apache.synapse.aspects.flow.statistics.data.raw.StatisticDataUnit;
import org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.stores.SpanStore;
import org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.models.SpanWrapper;
import java.util.List;
/**
* Resolves the latest active span, as the parent.
*/
public class LatestActiveParentResolver extends AbstractParentResolver {
/**
* Resolves the latest active span as the parent.
* @param spanStore The span store object.
* @return Resolved parent span wrapper.
*/
public static SpanWrapper resolveParent(SpanStore spanStore) {
return resolveLatestActiveSpanWrapper(spanStore);
}
/**
* Resolves the latest active span wrapper - which is either a Call mediator, a Send mediator,
* or a flow continuable mediator, as the parent span wrapper for endpoints or inbound endpoints.
* @param spanStore The span store object.
* @return Resolved parent span wrapper.
*/
public static SpanWrapper resolveParentForEndpointOrInboundEndpoint(SpanStore spanStore) {
List<SpanWrapper> parentableSpans = spanStore.getActiveSpanWrappers();
for (int i = parentableSpans.size() - 1; i >= 0; i--) {
SpanWrapper spanWrapper = parentableSpans.get(i);
StatisticDataUnit statisticDataUnit = spanWrapper.getStatisticDataUnit();
if (isCallMediator(statisticDataUnit) ||
isSendMediator(statisticDataUnit) ||
isFlowContinuableMediator(statisticDataUnit)) {
return spanWrapper;
}
}
return null;
}
/**
* Resolves the latest active span wrapper as the parent, regardless of its type.
* @param spanStore The span store object.
* @return Resolved parent span wrapper.
*/
private static SpanWrapper resolveLatestActiveSpanWrapper(SpanStore spanStore) {
List<SpanWrapper> activeSpanWrappers = spanStore.getActiveSpanWrappers();
if (activeSpanWrappers.isEmpty()) {
return null;
}
return activeSpanWrappers.get(activeSpanWrappers.size() - 1);
}
}