org.apache.flink.runtime.accumulators.AccumulatorSnapshot Maven / Gradle / Ivy
The newest version!
/*
* 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.accumulators;
import org.apache.flink.api.common.JobID;
import org.apache.flink.api.common.accumulators.Accumulator;
import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
import org.apache.flink.util.SerializedValue;
import java.io.IOException;
import java.io.Serializable;
import java.util.Map;
/**
* This class encapsulates a map of accumulators for a single task. It is used
* for the transfer from TaskManagers to the JobManager and from the JobManager
* to the Client.
*/
public class AccumulatorSnapshot implements Serializable {
private static final long serialVersionUID = 42L;
private final JobID jobID;
private final ExecutionAttemptID executionAttemptID;
/**
* Serialized user accumulators which may require the custom user class loader.
*/
private final SerializedValue>> userAccumulators;
public AccumulatorSnapshot(JobID jobID, ExecutionAttemptID executionAttemptID,
Map> userAccumulators) throws IOException {
this.jobID = jobID;
this.executionAttemptID = executionAttemptID;
this.userAccumulators = new SerializedValue<>(userAccumulators);
}
public JobID getJobID() {
return jobID;
}
public ExecutionAttemptID getExecutionAttemptID() {
return executionAttemptID;
}
/**
* Gets the user-defined accumulators values.
* @return the serialized map
*/
public Map> deserializeUserAccumulators(ClassLoader classLoader) throws IOException, ClassNotFoundException {
return userAccumulators.deserializeValue(classLoader);
}
}