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   /*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project 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.jboss.netty.container.osgi;
  
  import org.jboss.netty.logging.InternalLoggerFactory;
  import org.jboss.netty.logging.OsgiLoggerFactory;
  import org.osgi.framework.BundleActivator;
  import org.osgi.framework.BundleContext;
  
  /**
   * An OSGi {@link BundleActivator} that configures logging.
   */
  public class NettyBundleActivator implements BundleActivator {
  
      private OsgiLoggerFactory loggerFactory;
  
      public void start(BundleContext ctx) throws Exception {
          // Switch the internal logger to the OSGi LogService.
          loggerFactory = new OsgiLoggerFactory(ctx);
          InternalLoggerFactory.setDefaultFactory(loggerFactory);
      }
  
      public void stop(BundleContext ctx) throws Exception {
          if (loggerFactory != null) {
              InternalLoggerFactory.setDefaultFactory(loggerFactory.getFallback());
              loggerFactory.destroy();
              loggerFactory = null;
          }
      }
  }