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 com.alibaba.metrics.tomcat;
  
  import com.alibaba.metrics.MetricManager;
  import com.alibaba.metrics.MetricName;
  import com.alibaba.metrics.MetricRegistry;
  import org.apache.catalina.LifecycleException;
  import org.apache.catalina.startup.Tomcat;
  import org.junit.Assert;
  import org.junit.Test;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  public class TestTomcatThreadMetrics {
  
      @Test
      public void testTomcatThreadMetrics() {
          Tomcat tomcat = new Tomcat();
          tomcat.setPort(22222);
          tomcat.addContext("", "/tmp");
          tomcat.addServlet("", "testServlet", TestServlet.class.getName());
          MetricManager.register("tomcat", MetricName.build("middleware.tomcat.thread"), new ThreadGaugeSet());
          try {
              tomcat.start();
          } catch (LifecycleException e) {
              e.printStackTrace();
          }
  
          MetricRegistry registry = MetricManager.getIMetricManager().getMetricRegistryByGroup("tomcat");
          Assert.assertNotNull(registry.getGauges().get(MetricName.build("middleware.tomcat.thread.busy_count")));
          Assert.assertNotNull(registry.getGauges().get(MetricName.build("middleware.tomcat.thread.total_count")));
          Assert.assertNotNull(registry.getGauges().get(MetricName.build("middleware.tomcat.thread.min_pool_size")));
          Assert.assertNotNull(registry.getGauges().get(MetricName.build("middleware.tomcat.thread.max_pool_size")));
          Assert.assertNotNull(registry.getGauges().get(MetricName.build("middleware.tomcat.thread.thread_pool_queue_size")));
      }
  
      private class TestServlet extends HttpServlet {
  
          @Override
          protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
              super.doGet(req, resp);
          }
      }
  }
  