/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* 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.linkedin.pinot.core.util.trace;
import com.linkedin.pinot.common.request.InstanceRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Wrap a {@link Runnable} so that the thread executes this job
* will be automatically registered/unregistered to/from a request.
*
*/
public abstract class TraceRunnable implements Runnable {
private static final Logger LOGGER = LoggerFactory.getLogger(TraceRunnable.class);
private final InstanceRequest request;
private final Trace parent;
private TraceRunnable(InstanceRequest request, Trace parent) {
if (request == null) {
LOGGER.warn("Passing null request to TraceRunnable, maybe forget to register the request in current thread.");
}
this.request = request;
this.parent = parent;
}
/**
* Only works when the calling thread has registered the requestId
*/
public TraceRunnable() {
this(TraceContext.getRequestForCurrentThread(), TraceContext.getLocalTraceForCurrentThread());
}
@Override
public void run() {
if (request != null) TraceContext.registerThreadToRequest(request, parent);
try {
runJob();
} finally {
if (request != null) TraceContext.unregisterThreadFromRequest();
}
}
public abstract void runJob();
}