org.apache.flink.runtime.rest.handler.legacy.backpressure.BackPressureStats Maven / Gradle / Ivy
/*
* 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.rest.handler.legacy.backpressure;
import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
import javax.annotation.Nonnegative;
import java.util.Collections;
import java.util.Map;
import static org.apache.flink.util.Preconditions.checkArgument;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* Back pressure stats for one or more tasks.
*
* The stats are collected by request triggered in {@link BackPressureRequestCoordinator}.
*/
public class BackPressureStats {
/** ID of the request (unique per job). */
private final int requestId;
/** Time stamp, when the request was triggered. */
private final long startTime;
/** Time stamp, when all back pressure stats were collected at the BackPressureRequestCoordinator. */
private final long endTime;
/** Map of back pressure ratios by execution ID. */
private final Map backPressureRatios;
public BackPressureStats(
@Nonnegative int requestId,
@Nonnegative long startTime,
@Nonnegative long endTime,
Map backPressureRatios) {
checkArgument(endTime >= startTime, "End time must not before start time.");
this.requestId = requestId;
this.startTime = startTime;
this.endTime = endTime;
this.backPressureRatios = Collections.unmodifiableMap(checkNotNull(backPressureRatios));
}
public int getRequestId() {
return requestId;
}
public long getStartTime() {
return startTime;
}
public long getEndTime() {
return endTime;
}
public Map getBackPressureRatios() {
return backPressureRatios;
}
@Override
public String toString() {
return "BackPressureStats{" +
"requestId=" + requestId +
", startTime=" + startTime +
", endTime=" + endTime +
'}';
}
}