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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.rest.handler.legacy;
import org.apache.flink.runtime.execution.ExecutionState;
import org.apache.flink.runtime.executiongraph.AccessExecutionGraph;
import org.apache.flink.runtime.executiongraph.AccessExecutionJobVertex;
import org.apache.flink.runtime.executiongraph.AccessExecutionVertex;
import org.apache.flink.runtime.rest.handler.legacy.metrics.MetricFetcher;
import org.apache.flink.runtime.rest.handler.util.MutableIOMetrics;
import org.apache.flink.runtime.taskmanager.TaskManagerLocation;
import org.apache.flink.runtime.webmonitor.history.ArchivedJson;
import org.apache.flink.runtime.webmonitor.history.JsonArchivist;
import org.apache.flink.util.FlinkException;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonGenerator;
import javax.annotation.Nullable;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.Executor;
/**
* A request handler that provides the details of a job vertex, including id, name, parallelism,
* and the runtime and metrics of all its subtasks.
*/
public class JobVertexDetailsHandler extends AbstractJobVertexRequestHandler {
private static final String JOB_VERTEX_DETAILS_REST_PATH = "/jobs/:jobid/vertices/:vertexid";
private final MetricFetcher fetcher;
public JobVertexDetailsHandler(ExecutionGraphCache executionGraphHolder, Executor executor, MetricFetcher fetcher) {
super(executionGraphHolder, executor);
this.fetcher = fetcher;
}
@Override
public String[] getPaths() {
return new String[]{JOB_VERTEX_DETAILS_REST_PATH};
}
@Override
public CompletableFuture handleRequest(AccessExecutionJobVertex jobVertex, Map params) {
return CompletableFuture.supplyAsync(
() -> {
try {
return createVertexDetailsJson(jobVertex, params.get("jobid"), fetcher);
} catch (IOException e) {
throw new CompletionException(new FlinkException("Could not write the vertex details json.", e));
}
},
executor);
}
/**
* Archivist for the JobVertexDetailsHandler.
*/
public static class JobVertexDetailsJsonArchivist implements JsonArchivist {
@Override
public Collection archiveJsonWithPath(AccessExecutionGraph graph) throws IOException {
List archive = new ArrayList<>();
for (AccessExecutionJobVertex task : graph.getAllVertices().values()) {
String json = createVertexDetailsJson(task, graph.getJobID().toString(), null);
String path = JOB_VERTEX_DETAILS_REST_PATH
.replace(":jobid", graph.getJobID().toString())
.replace(":vertexid", task.getJobVertexId().toString());
archive.add(new ArchivedJson(path, json));
}
return archive;
}
}
public static String createVertexDetailsJson(
AccessExecutionJobVertex jobVertex,
String jobID,
@Nullable MetricFetcher fetcher) throws IOException {
final long now = System.currentTimeMillis();
StringWriter writer = new StringWriter();
JsonGenerator gen = JsonFactory.JACKSON_FACTORY.createGenerator(writer);
gen.writeStartObject();
gen.writeStringField("id", jobVertex.getJobVertexId().toString());
gen.writeStringField("name", jobVertex.getName());
gen.writeNumberField("parallelism", jobVertex.getParallelism());
gen.writeNumberField("now", now);
gen.writeArrayFieldStart("subtasks");
int num = 0;
for (AccessExecutionVertex vertex : jobVertex.getTaskVertices()) {
final ExecutionState status = vertex.getExecutionState();
TaskManagerLocation location = vertex.getCurrentAssignedResourceLocation();
String locationString = location == null ? "(unassigned)" : location.getHostname() + ":" + location.dataPort();
long startTime = vertex.getStateTimestamp(ExecutionState.DEPLOYING);
if (startTime == 0) {
startTime = -1;
}
long endTime = status.isTerminal() ? vertex.getStateTimestamp(status) : -1;
long duration = startTime > 0 ? ((endTime > 0 ? endTime : now) - startTime) : -1;
gen.writeStartObject();
gen.writeNumberField("subtask", num);
gen.writeStringField("status", status.name());
gen.writeNumberField("attempt", vertex.getCurrentExecutionAttempt().getAttemptNumber());
gen.writeStringField("host", locationString);
gen.writeNumberField("start-time", startTime);
gen.writeNumberField("end-time", endTime);
gen.writeNumberField("duration", duration);
MutableIOMetrics counts = new MutableIOMetrics();
counts.addIOMetrics(
vertex.getCurrentExecutionAttempt(),
fetcher,
jobID,
jobVertex.getJobVertexId().toString()
);
counts.writeIOMetricsAsJson(gen);
gen.writeEndObject();
num++;
}
gen.writeEndArray();
gen.writeEndObject();
gen.close();
return writer.toString();
}
}
