Coverage report

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org.apache.jcs.auxiliary.remote.RemoteCacheRestore
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 1   
 package org.apache.jcs.auxiliary.remote;
 2   
 
 3   
 /*
 4   
  * Licensed to the Apache Software Foundation (ASF) under one
 5   
  * or more contributor license agreements.  See the NOTICE file
 6   
  * distributed with this work for additional information
 7   
  * regarding copyright ownership.  The ASF licenses this file
 8   
  * to you under the Apache License, Version 2.0 (the
 9   
  * "License"); you may not use this file except in compliance
 10   
  * with the License.  You may obtain a copy of the License at
 11   
  *
 12   
  *   http://www.apache.org/licenses/LICENSE-2.0
 13   
  *
 14   
  * Unless required by applicable law or agreed to in writing,
 15   
  * software distributed under the License is distributed on an
 16   
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 17   
  * KIND, either express or implied.  See the License for the
 18   
  * specific language governing permissions and limitations
 19   
  * under the License.
 20   
  */
 21   
 
 22   
 import java.rmi.Naming;
 23   
 
 24   
 import org.apache.commons.logging.Log;
 25   
 import org.apache.commons.logging.LogFactory;
 26   
 import org.apache.jcs.auxiliary.remote.behavior.IRemoteCacheObserver;
 27   
 import org.apache.jcs.auxiliary.remote.behavior.IRemoteCacheService;
 28   
 import org.apache.jcs.engine.behavior.ICacheRestore;
 29   
 
 30   
 /**
 31   
  * Used to repair the remote caches managed by the associated instance of RemoteCacheManager.
 32   
  * <p>
 33   
  * When there is an error the monitor kicks off. The Failover runner starts looks for a manager with
 34   
  * a connection to a remote cache that is not in error. If a manager's connection to a remote cache
 35   
  * is found to be in error, the restorer kicks off and tries to reconnect. When it is succesful, the
 36   
  * status of the manager changes.
 37   
  * <p>
 38   
  * When the failover runner finds that the primary is in good shape, it will switch back. Switching
 39   
  * back invovles setting the first no wait on the no wait facade.
 40   
  */
 41   
 public class RemoteCacheRestore
 42   
     implements ICacheRestore
 43   
 {
 44  0 
     private final static Log log = LogFactory.getLog( RemoteCacheRestore.class );
 45   
 
 46   
     private final RemoteCacheManager rcm;
 47   
 
 48   
     // private final AuxiliaryCacheManager rcm;
 49  0 
     private boolean canFix = true;
 50   
 
 51   
     private Object remoteObj;
 52   
 
 53   
     /**
 54   
      * Constructs with the given instance of RemoteCacheManager.
 55   
      * @param rcm
 56   
      */
 57   
     public RemoteCacheRestore( RemoteCacheManager rcm )
 58  0 
     {
 59   
         // public RemoteCacheRestore(AuxiliaryCacheManager rcm) {
 60  0 
         this.rcm = rcm;
 61  0 
     }
 62   
 
 63   
     /**
 64   
      * Returns true if the connection to the remote host for the corresponding cache manager can be
 65   
      * successfully re-established.
 66   
      * <p>
 67   
      * @return true if we found a failover server
 68   
      */
 69   
     public boolean canFix()
 70   
     {
 71  0 
         if ( !canFix )
 72   
         {
 73  0 
             return canFix;
 74   
         }
 75  0 
         String registry = "//" + rcm.host + ":" + rcm.port + "/" + rcm.service;
 76  0 
         if ( log.isInfoEnabled() )
 77   
         {
 78  0 
             log.info( "looking up server " + registry );
 79   
         }
 80   
         try
 81   
         {
 82  0 
             remoteObj = Naming.lookup( registry );
 83  0 
             if ( log.isInfoEnabled() )
 84   
             {
 85  0 
                 log.info( "looking up server " + registry );
 86   
             }
 87   
         }
 88  0 
         catch ( Exception ex )
 89   
         {
 90  0 
             log.error( "host=" + rcm.host + "; port" + rcm.port + "; service=" + rcm.service );
 91  0 
             canFix = false;
 92  0 
         }
 93  0 
         return canFix;
 94   
     }
 95   
 
 96   
     /**
 97   
      * Fixes up all the caches managed by the associated cache manager.
 98   
      */
 99   
     public void fix()
 100   
     {
 101  0 
         if ( !canFix )
 102   
         {
 103  0 
             return;
 104   
         }
 105  0 
         rcm.fixCaches( (IRemoteCacheService) remoteObj, (IRemoteCacheObserver) remoteObj );
 106   
 
 107  0 
         if ( log.isInfoEnabled() )
 108   
         {
 109  0 
             String msg = "Remote connection to " + "//" + rcm.host + ":" + rcm.port + "/" + rcm.service + " resumed.";
 110  0 
             log.info( msg );
 111   
         }
 112  0 
     }
 113   
 }

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