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A module that is everything required to understands Druid Segments
/*
* 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 org.apache.druid.query;
import com.google.common.util.concurrent.ForwardingListeningExecutorService;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import java.util.concurrent.ExecutorService;
/**
* Default implementation of {@link QueryProcessingPool} that just forwards operations, including query execution tasks,
* to an underlying {@link ExecutorService}
*/
public class ForwardingQueryProcessingPool extends ForwardingListeningExecutorService implements QueryProcessingPool
{
private final ListeningExecutorService delegate;
public ForwardingQueryProcessingPool(ExecutorService executorService)
{
this.delegate = MoreExecutors.listeningDecorator(executorService);
}
@Override
public ListenableFuture submitRunnerTask(PrioritizedQueryRunnerCallable task)
{
return delegate().submit(task);
}
@Override
protected ListeningExecutorService delegate()
{
return delegate;
}
}