Github user bbende commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2171#discussion_r142979354
--- Diff:
nifi-nar-bundles/nifi-metrics-reporting-bundle/nifi-metrics-reporting-task/src/main/java/org/apache/nifi/metrics/reporting/task/MetricsReportingTask.java
---
@@ -0,0 +1,125 @@
+/*
+ * 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.nifi.metrics.reporting.task;
+
+import com.codahale.metrics.MetricRegistry;
+import com.codahale.metrics.ScheduledReporter;
+import com.codahale.metrics.jvm.MemoryUsageGaugeSet;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.controller.status.ProcessGroupStatus;
+import org.apache.nifi.metrics.FlowMetricSet;
+import
org.apache.nifi.metrics.reporting.reporter.service.MetricReporterService;
+import org.apache.nifi.reporting.AbstractReportingTask;
+import org.apache.nifi.reporting.ReportingContext;
+import org.apache.nifi.reporting.ReportingInitializationContext;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * A reporting task for NiFi instance and JVM related metrics.
+ *
+ * This task reports metrics to services according to a provided {@link
ScheduledReporter}, reached by using a
+ * {@link MetricReporterService}. In order to report to different clients,
simply use different implementations of
+ * the controller service.
+ *
+ * @see MetricReporterService
+ * @author Omer Hadari
+ */
+@Tags({"metrics", "reporting"})
+@CapabilityDescription("This reporting task reports a set of metrics
regarding the JVM and the NiFi instance" +
+ "to a reporter. The reporter is provided by a
MetricReporterService.")
+public class MetricsReportingTask extends AbstractReportingTask {
+
+ /**
+ * Points to the service which provides {@link ScheduledReporter}
instances.
+ */
+ protected static final PropertyDescriptor REPORTER_SERVICE = new
PropertyDescriptor.Builder()
+ .name("metric reporter service")
+ .displayName("metric reporter service")
--- End diff --
Should be "Metric Reporter Service" for consistency in the UI
---
