/*
* 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.webmonitor.handlers;
import com.fasterxml.jackson.core.JsonGenerator;
import org.apache.flink.runtime.checkpoint.stats.OperatorCheckpointStats;
import org.apache.flink.runtime.executiongraph.AccessExecutionJobVertex;
import org.apache.flink.runtime.webmonitor.ExecutionGraphHolder;
import scala.Option;
import java.io.StringWriter;
import java.util.Map;
/**
* Request handler that returns checkpoint stats for a single job vertex.
*/
public class JobVertexCheckpointsHandler extends AbstractJobVertexRequestHandler {
public JobVertexCheckpointsHandler(ExecutionGraphHolder executionGraphHolder) {
super(executionGraphHolder);
}
@Override
public String handleRequest(AccessExecutionJobVertex jobVertex, Map<String, String> params) throws Exception {
StringWriter writer = new StringWriter();
JsonGenerator gen = JsonFactory.jacksonFactory.createGenerator(writer);
gen.writeStartObject();
Option<OperatorCheckpointStats> statsOption = jobVertex.getCheckpointStats();
if (statsOption.isDefined()) {
OperatorCheckpointStats stats = statsOption.get();
gen.writeNumberField("id", stats.getCheckpointId());
gen.writeNumberField("timestamp", stats.getTriggerTimestamp());
gen.writeNumberField("duration", stats.getDuration());
gen.writeNumberField("size", stats.getStateSize());
gen.writeNumberField("parallelism", stats.getNumberOfSubTasks());
gen.writeArrayFieldStart("subtasks");
for (int i = 0; i < stats.getNumberOfSubTasks(); i++) {
gen.writeStartObject();
gen.writeNumberField("subtask", i);
gen.writeNumberField("duration", stats.getSubTaskDuration(i));
gen.writeNumberField("size", stats.getSubTaskStateSize(i));
gen.writeEndObject();
}
gen.writeEndArray();
}
gen.writeEndObject();
gen.close();
return writer.toString();
}
}