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Subject [GitHub] zentol commented on a change in pull request #6814: [FLINK-10423][rocksdb][metrics] rocksdb native metrics monitor
Date Tue, 16 Oct 2018 09:03:18 GMT
zentol commented on a change in pull request #6814: [FLINK-10423][rocksdb][metrics] rocksdb
native metrics monitor
URL: https://github.com/apache/flink/pull/6814#discussion_r225454717
 
 

 ##########
 File path: flink-state-backends/flink-statebackend-rocksdb/src/test/java/org/apache/flink/contrib/streaming/state/RocksDBNativeMetricMonitorTest.java
 ##########
 @@ -0,0 +1,179 @@
+/*
+ * 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.contrib.streaming.state;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.MetricOptions;
+import org.apache.flink.metrics.Metric;
+import org.apache.flink.runtime.jobgraph.OperatorID;
+import org.apache.flink.runtime.metrics.MetricRegistry;
+import org.apache.flink.runtime.metrics.groups.AbstractMetricGroup;
+import org.apache.flink.runtime.metrics.groups.OperatorMetricGroup;
+import org.apache.flink.runtime.metrics.groups.UnregisteredMetricGroups;
+import org.apache.flink.runtime.metrics.scope.ScopeFormats;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.rocksdb.ColumnFamilyHandle;
+
+import javax.annotation.Nullable;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+
+/**
+ * validate native metric monitor.
+ */
+public class RocksDBNativeMetricMonitorTest {
+
+	private static final String OPERATOR_NAME = "dummy";
+
+	private static final String COLUMN_FAMILY_NAME = "column-family";
+
+	private static final BigInteger ZERO = new BigInteger(1, new byte[]{0, 0, 0, 0});
+
+	@Test
+	public void testMetricMonitorLifecycle() throws Throwable {
+		//We use a local variable here to manually control the life-cycle.
+		// This allows us to verify that metrics do not try to access
+		// RocksDB after the monitor was closed.
+		RocksDBResource rocksDBResource = new RocksDBResource();
+		rocksDBResource.before();
+
+		SimpleMetricRegistry registry = new SimpleMetricRegistry();
+		OperatorMetricGroup group = new OperatorMetricGroup(
 
 Review comment:
   this can be simplified to `MetricGroup group = new UnregisteredMetricGroups()`.

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