Github user GJL commented on a diff in the pull request:
https://github.com/apache/flink/pull/5081#discussion_r153243460
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/job/metrics/TaskManagerMetricsHandler.java
---
@@ -0,0 +1,64 @@
+/*
+ * 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.job.metrics;
+
+import org.apache.flink.api.common.time.Time;
+import org.apache.flink.runtime.dispatcher.DispatcherGateway;
+import org.apache.flink.runtime.instance.InstanceID;
+import org.apache.flink.runtime.rest.handler.HandlerRequest;
+import org.apache.flink.runtime.rest.handler.legacy.metrics.MetricFetcher;
+import org.apache.flink.runtime.rest.handler.legacy.metrics.MetricStore;
+import org.apache.flink.runtime.rest.messages.EmptyRequestBody;
+import
org.apache.flink.runtime.rest.messages.job.metrics.TaskManagerMetricsHeaders;
+import
org.apache.flink.runtime.rest.messages.job.metrics.TaskManagerMetricsMessageParameters;
+import
org.apache.flink.runtime.rest.messages.taskmanager.TaskManagerIdPathParameter;
+import org.apache.flink.runtime.webmonitor.retriever.GatewayRetriever;
+
+import javax.annotation.Nullable;
+
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Handler that returns TaskManager metrics.
+ *
+ * @see MetricStore#getTaskManagerMetricStore(String)
+ */
+public class TaskManagerMetricsHandler extends
AbstractMetricsHandler<TaskManagerMetricsMessageParameters> {
+
+ public TaskManagerMetricsHandler(
+ final CompletableFuture<String> localRestAddress,
+ final GatewayRetriever<DispatcherGateway>
leaderRetriever,
+ final Time timeout,
+ final Map<String, String> headers,
+ final MetricFetcher metricFetcher) {
+ super(localRestAddress, leaderRetriever, timeout, headers,
TaskManagerMetricsHeaders.getInstance(),
+ metricFetcher);
+ }
+
+ @Nullable
+ @Override
+ protected MetricStore.ComponentMetricStore getComponentMetricStore(
+ final HandlerRequest<EmptyRequestBody,
TaskManagerMetricsMessageParameters> request,
+ final MetricStore metricStore) {
+ final InstanceID pathParameter =
request.getPathParameter(TaskManagerIdPathParameter.class);
--- End diff --
This PR should be probably merged after
[FLINK-8150](https://issues.apache.org/jira/browse/FLINK-8150).
---
