opendaylight/clustering/services_implementation/src/main/java/org/opendaylight/controller/clustering/services_implementation/internal/ClassResolver.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.clustering.services_implementation.internal;
  10
  11 import java.lang.ref.WeakReference;
  12
  13 import org.jboss.marshalling.ContextClassResolver;
  14 import org.slf4j.Logger;
  15 import org.slf4j.LoggerFactory;
  16
  17 public final class ClassResolver extends ContextClassResolver {
  18     private WeakReference<ClassLoader> osgiClassLoader = null;
  19     private static final Logger logger = LoggerFactory.getLogger(ClassResolver.class);
  20
  21     public ClassResolver() {
  22         ClassLoader cl = this.getClass()
  23                 .getClassLoader();
  24         if (cl != null) {
  25             this.osgiClassLoader = new WeakReference<ClassLoader>(cl);
  26             logger.trace("Acquired weak reference to OSGi classLoader {}", cl);
  27         }
  28     }
  29
  30     @Override
  31     protected ClassLoader getClassLoader() {
  32         ClassLoader ret = null;
  33         if (this.osgiClassLoader != null) {
  34             ret = this.osgiClassLoader.get();
  35             if (ret != null) {
  36                 if (logger.isTraceEnabled()) {
  37                     logger.trace("Returning OSGi class loader {}", ret);
  38                 }
  39                 return ret;
  40             }
  41         }
  42
  43         logger.warn("Could not resolve classloader!");
  44         return ret;
  45     }
  46 }