content: /*
   * Copyright 2010 Proofpoint, Inc.
   *
   * Licensed 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 io.airlift.jmx;
  
  import com.google.inject.Binder;
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Scopes;
  import io.airlift.configuration.AbstractConfigurationAwareModule;
  import io.airlift.discovery.client.ServiceAnnouncement;
  
  import javax.management.MBeanServer;
  
  import java.lang.management.ManagementFactory;
  
  import static com.google.common.base.Preconditions.checkState;
  import static io.airlift.configuration.ConfigBinder.configBinder;
  import static io.airlift.discovery.client.DiscoveryBinder.discoveryBinder;
  import static io.airlift.discovery.client.ServiceAnnouncement.serviceAnnouncement;
  import static org.weakref.jmx.guice.ExportBinder.newExporter;
  
  public class JmxModule
          extends AbstractConfigurationAwareModule
  {
      @Override
      protected void setup(Binder binder)
      {
          binder.disableCircularProxies();
  
          binder.bind(MBeanServer.class).toInstance(ManagementFactory.getPlatformMBeanServer());
          configBinder(binder).bindConfig(JmxConfig.class);
  
          newExporter(binder).export(StackTraceMBean.class).withGeneratedName();
          binder.bind(StackTraceMBean.class).in(Scopes.SINGLETON);
  
          JmxConfig jmxConfig = buildConfigObject(JmxConfig.class);
  
          if (jmxConfig.getRmiRegistryPort() == null) {
              // Do not export JmxAgent by default for security reasons.
              // Also, exporting it at randomly picked port was proven to be unreliable in certain environments.
  
              checkState(jmxConfig.getRmiServerPort() == null, "RMI registry port must be configured when RMI server port is configured");
          }
          else {
              discoveryBinder(binder).bindServiceAnnouncement(JmxAnnouncementProvider.class);
              binder.bind(JmxAgent.class).in(Scopes.SINGLETON);
          }
      }
  
      static class JmxAnnouncementProvider
              implements Provider<ServiceAnnouncement>
      {
          private JmxAgent jmxAgent;
  
          @Inject
          public void setJmxAgent(JmxAgent jmxAgent)
          {
              this.jmxAgent = jmxAgent;
          }
  
          @Override
          public ServiceAnnouncement get()
          {
              return serviceAnnouncement("jmx")
                      .addProperty("jmx", jmxAgent.getUrl().toString())
                      .build();
          }
      }
  }
  