/*
* 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.facebook.presto.execution;
import com.facebook.presto.OutputBuffers;
import com.facebook.presto.Session;
import com.facebook.presto.execution.NodeTaskMap.PartitionedSplitCountTracker;
import com.facebook.presto.execution.StateMachine.StateChangeListener;
import com.facebook.presto.metadata.Split;
import com.facebook.presto.spi.Node;
import com.facebook.presto.sql.planner.PlanFragment;
import com.facebook.presto.sql.planner.plan.PlanNodeId;
import com.google.common.collect.Multimap;
import static java.util.Objects.requireNonNull;
public class MemoryTrackingRemoteTaskFactory
implements RemoteTaskFactory
{
private final RemoteTaskFactory remoteTaskFactory;
private final QueryStateMachine stateMachine;
public MemoryTrackingRemoteTaskFactory(RemoteTaskFactory remoteTaskFactory, QueryStateMachine stateMachine)
{
this.remoteTaskFactory = requireNonNull(remoteTaskFactory, "remoteTaskFactory is null");
this.stateMachine = requireNonNull(stateMachine, "stateMachine is null");
}
@Override
public RemoteTask createRemoteTask(Session session,
TaskId taskId,
Node node,
PlanFragment fragment,
Multimap<PlanNodeId, Split> initialSplits,
OutputBuffers outputBuffers,
PartitionedSplitCountTracker partitionedSplitCountTracker,
boolean summarizeTaskInfo)
{
RemoteTask task = remoteTaskFactory.createRemoteTask(session,
taskId,
node,
fragment,
initialSplits,
outputBuffers,
partitionedSplitCountTracker,
summarizeTaskInfo);
task.addStateChangeListener(new UpdatePeakMemory(stateMachine));
return task;
}
private static final class UpdatePeakMemory
implements StateChangeListener<TaskStatus>
{
private final QueryStateMachine stateMachine;
private long previousMemory;
public UpdatePeakMemory(QueryStateMachine stateMachine)
{
this.stateMachine = stateMachine;
}
@Override
public synchronized void stateChanged(TaskStatus newStatus)
{
long currentMemory = newStatus.getMemoryReservation().toBytes();
long deltaMemoryInBytes = currentMemory - previousMemory;
previousMemory = currentMemory;
stateMachine.updateMemoryUsage(deltaMemoryInBytes);
}
}
}