content: /*
   * 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.kafka.common.utils;
  
  import org.apache.kafka.common.metrics.Metrics;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.lang.management.ManagementFactory;
  
  import javax.management.JMException;
  import javax.management.MBeanServer;
  import javax.management.MalformedObjectNameException;
  import javax.management.ObjectName;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class AppInfoParserTest {
      private static final String EXPECTED_COMMIT_VERSION = AppInfoParser.DEFAULT_VALUE;
      private static final String EXPECTED_VERSION = AppInfoParser.DEFAULT_VALUE;
      private static final Long EXPECTED_START_MS = 1552313875722L;
      private static final String METRICS_PREFIX = "app-info-test";
      private static final String METRICS_ID = "test";
  
      private Metrics metrics;
      private MBeanServer mBeanServer;
  
      @BeforeEach
      public void setUp() {
          metrics = new Metrics(new MockTime(1));
          mBeanServer = ManagementFactory.getPlatformMBeanServer();
      }
  
      @AfterEach
      public void tearDown() {
          metrics.close();
      }
  
      @Test
      public void testRegisterAppInfoRegistersMetrics() throws JMException {
          registerAppInfo();
          registerAppInfoMultipleTimes();
      }
  
      @Test
      public void testUnregisterAppInfoUnregistersMetrics() throws JMException {
          registerAppInfo();
          AppInfoParser.unregisterAppInfo(METRICS_PREFIX, METRICS_ID, metrics);
  
          assertFalse(mBeanServer.isRegistered(expectedAppObjectName()));
          assertNull(metrics.metric(metrics.metricName("commit-id", "app-info")));
          assertNull(metrics.metric(metrics.metricName("version", "app-info")));
          assertNull(metrics.metric(metrics.metricName("start-time-ms", "app-info")));
      }
  
      private void registerAppInfo() throws JMException {
          assertEquals(EXPECTED_COMMIT_VERSION, AppInfoParser.getCommitId());
          assertEquals(EXPECTED_VERSION, AppInfoParser.getVersion());
  
          AppInfoParser.registerAppInfo(METRICS_PREFIX, METRICS_ID, metrics, EXPECTED_START_MS);
  
          assertTrue(mBeanServer.isRegistered(expectedAppObjectName()));
          assertEquals(EXPECTED_COMMIT_VERSION, metrics.metric(metrics.metricName("commit-id", "app-info")).metricValue());
          assertEquals(EXPECTED_VERSION, metrics.metric(metrics.metricName("version", "app-info")).metricValue());
          assertEquals(EXPECTED_START_MS, metrics.metric(metrics.metricName("start-time-ms", "app-info")).metricValue());
      }
  
      private void registerAppInfoMultipleTimes() throws JMException {
          assertEquals(EXPECTED_COMMIT_VERSION, AppInfoParser.getCommitId());
          assertEquals(EXPECTED_VERSION, AppInfoParser.getVersion());
  
          AppInfoParser.registerAppInfo(METRICS_PREFIX, METRICS_ID, metrics, EXPECTED_START_MS);
          AppInfoParser.registerAppInfo(METRICS_PREFIX, METRICS_ID, metrics, EXPECTED_START_MS); // We register it again
  
          assertTrue(mBeanServer.isRegistered(expectedAppObjectName()));
          assertEquals(EXPECTED_COMMIT_VERSION, metrics.metric(metrics.metricName("commit-id", "app-info")).metricValue());
          assertEquals(EXPECTED_VERSION, metrics.metric(metrics.metricName("version", "app-info")).metricValue());
          assertEquals(EXPECTED_START_MS, metrics.metric(metrics.metricName("start-time-ms", "app-info")).metricValue());
      }
  
      private ObjectName expectedAppObjectName() throws MalformedObjectNameException {
          return new ObjectName(METRICS_PREFIX + ":type=app-info,id=" + METRICS_ID);
      }
  }
  