org.apache.flink.runtime.preaggregatedaccumulators.EmptyOperationAccumulatorAggregationManager Maven / Gradle / Ivy
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* 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.flink.runtime.preaggregatedaccumulators;
import org.apache.flink.api.common.JobID;
import org.apache.flink.api.common.accumulators.Accumulator;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import java.io.Serializable;
import java.util.concurrent.CompletableFuture;
/**
* A specialized implementation for non-FLIP6 architecture who simply ignores all the committed values,
* and queries sent to this implementation will never be fulfilled.
*/
public final class EmptyOperationAccumulatorAggregationManager implements AccumulatorAggregationManager {
@Override
public void registerPreAggregatedAccumulator(JobID jobId, JobVertexID jobVertexId, int subtaskIndex, String name) {
}
@Override
public void commitPreAggregatedAccumulator(JobID jobId, JobVertexID jobVertexId, int subtaskIndex, String name, Accumulator value) {
}
@Override
public CompletableFuture> queryPreAggregatedAccumulator(JobID jobId, String name) {
return new CompletableFuture<>();
}
@Override
public void clearRegistrationForTask(JobID jobId, JobVertexID jobVertexId, int subtaskIndex) {
}
@Override
public void clearAccumulatorsForJob(JobID jobId) {
}
}