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.camel.component.metrics.routepolicy;
  
  import java.util.concurrent.TimeUnit;
  
  import javax.management.MBeanServer;
  
  import com.codahale.metrics.MetricRegistry;
  import com.codahale.metrics.jmx.JmxReporter;
  import com.codahale.metrics.json.MetricsModule;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.ObjectWriter;
  import org.apache.camel.CamelContext;
  import org.apache.camel.CamelContextAware;
  import org.apache.camel.RuntimeCamelException;
  import org.apache.camel.StaticService;
  import org.apache.camel.api.management.ManagedResource;
  import org.apache.camel.component.metrics.MetricsComponent;
  import org.apache.camel.spi.ManagementAgent;
  import org.apache.camel.spi.Registry;
  import org.apache.camel.support.service.ServiceSupport;
  
  /**
   * Service holding the {@link MetricRegistry} which registers all metrics.
   */
  @ManagedResource(description = "MetricsRegistry")
  public final class MetricsRegistryService extends ServiceSupport
          implements CamelContextAware, StaticService, MetricsRegistryMBean {
  
      private CamelContext camelContext;
      private MetricRegistry metricsRegistry;
      private JmxReporter reporter;
      private boolean useJmx;
      private String jmxDomain = "org.apache.camel.metrics";
      private boolean prettyPrint;
      private TimeUnit rateUnit = TimeUnit.SECONDS;
      private TimeUnit durationUnit = TimeUnit.MILLISECONDS;
      private transient ObjectMapper mapper;
      private transient ObjectMapper secondsMapper;
  
      public MetricRegistry getMetricsRegistry() {
          return metricsRegistry;
      }
  
      public void setMetricsRegistry(MetricRegistry metricsRegistry) {
          this.metricsRegistry = metricsRegistry;
      }
  
      @Override
      public CamelContext getCamelContext() {
          return camelContext;
      }
  
      @Override
      public void setCamelContext(CamelContext camelContext) {
          this.camelContext = camelContext;
      }
  
      public boolean isUseJmx() {
          return useJmx;
      }
  
      public void setUseJmx(boolean useJmx) {
          this.useJmx = useJmx;
      }
  
      public String getJmxDomain() {
          return jmxDomain;
      }
  
      public void setJmxDomain(String jmxDomain) {
          this.jmxDomain = jmxDomain;
      }
  
      public boolean isPrettyPrint() {
          return prettyPrint;
      }
  
      public void setPrettyPrint(boolean prettyPrint) {
          this.prettyPrint = prettyPrint;
      }
  
      public TimeUnit getRateUnit() {
          return rateUnit;
      }
  
      public void setRateUnit(TimeUnit rateUnit) {
          this.rateUnit = rateUnit;
      }
  
      public TimeUnit getDurationUnit() {
          return durationUnit;
      }
  
      public void setDurationUnit(TimeUnit durationUnit) {
          this.durationUnit = durationUnit;
      }
  
      @Override
      protected void doInit() throws Exception {
          if (metricsRegistry == null) {
              Registry camelRegistry = getCamelContext().getRegistry();
              metricsRegistry = camelRegistry.lookupByNameAndType(MetricsComponent.METRIC_REGISTRY_NAME, MetricRegistry.class);
              // create a new metricsRegistry by default
              if (metricsRegistry == null) {
                  metricsRegistry = new MetricRegistry();
              }
          }
  
          // json mapper
          this.mapper = new ObjectMapper().registerModule(new MetricsModule(getRateUnit(), getDurationUnit(), false));
          if (getRateUnit() == TimeUnit.SECONDS && getDurationUnit() == TimeUnit.SECONDS) {
              // they both use same units so reuse
              this.secondsMapper = this.mapper;
          } else {
              this.secondsMapper
                      = new ObjectMapper().registerModule(new MetricsModule(TimeUnit.SECONDS, TimeUnit.SECONDS, false));
          }
      }
  
      @Override
      protected void doStart() throws Exception {
          if (useJmx) {
              ManagementAgent agent = getCamelContext().getManagementStrategy().getManagementAgent();
              if (agent != null) {
                  MBeanServer server = agent.getMBeanServer();
                  if (server != null) {
                      reporter = JmxReporter.forRegistry(metricsRegistry).registerWith(server).inDomain(jmxDomain).build();
                      reporter.start();
                  }
              } else {
                  throw new IllegalStateException("CamelContext has not enabled JMX");
              }
          }
      }
  
      @Override
      protected void doStop() throws Exception {
          if (reporter != null) {
              reporter.stop();
              reporter = null;
          }
      }
  
      @Override
      public String dumpStatisticsAsJson() {
          ObjectWriter writer = mapper.writer();
          if (isPrettyPrint()) {
              writer = writer.withDefaultPrettyPrinter();
          }
          try {
              return writer.writeValueAsString(getMetricsRegistry());
          } catch (JsonProcessingException e) {
              throw RuntimeCamelException.wrapRuntimeCamelException(e);
          }
      }
  
      @Override
      public String dumpStatisticsAsJsonTimeUnitSeconds() {
          ObjectWriter writer = secondsMapper.writer();
          if (isPrettyPrint()) {
              writer = writer.withDefaultPrettyPrinter();
          }
          try {
              return writer.writeValueAsString(getMetricsRegistry());
          } catch (JsonProcessingException e) {
              throw RuntimeCamelException.wrapRuntimeCamelException(e);
          }
      }
  
  }
  