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.cloudstack.context;
  
  import javax.annotation.PostConstruct;
  import javax.inject.Inject;
  
  import org.apache.cloudstack.managed.context.ManagedContextListener;
  
  import com.cloud.utils.db.EntityManager;
  
  public class LogContextListener implements ManagedContextListener<Object> {
  
      @Inject
      EntityManager entityMgr;
  
      @Override
      public Object onEnterContext(boolean reentry) {
          if (!reentry && LogContext.current() == null) {
              LogContext.registerSystemLogContextOnceOnly();
          }
          return null;
      }
  
      @Override
      public void onLeaveContext(Object unused, boolean reentry) {
          if (!reentry) {
              LogContext.unregister();
          }
      }
  
      @PostConstruct
      public void init() {
          LogContext.init(entityMgr);
      }
  }
  