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1   package org.eclipse.aether.internal.impl;
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 org.eclipse.aether.RepositorySystemSession;
23  import org.eclipse.aether.transfer.AbstractTransferListener;
24  import org.eclipse.aether.transfer.TransferCancelledException;
25  import org.eclipse.aether.transfer.TransferEvent;
26  import org.eclipse.aether.transfer.TransferListener;
27  import org.slf4j.Logger;
28  import org.slf4j.LoggerFactory;
29  
30  class SafeTransferListener
31      extends AbstractTransferListener
32  {
33  
34      private static final Logger LOGGER = LoggerFactory.getLogger( SafeTransferListener.class );
35  
36      private final TransferListener listener;
37  
38      public static TransferListener wrap( RepositorySystemSession session )
39      {
40          TransferListener listener = session.getTransferListener();
41          if ( listener == null )
42          {
43              return null;
44          }
45          return new SafeTransferListener( listener );
46      }
47  
48      protected SafeTransferListener( RepositorySystemSession session )
49      {
50          this( session.getTransferListener() );
51      }
52  
53      private SafeTransferListener( TransferListener listener )
54      {
55          this.listener = listener;
56      }
57  
58      private void logError( TransferEvent event, Throwable e )
59      {
60          LOGGER.debug( "Failed to dispatch transfer event '{}' to {}", event,  listener.getClass().getCanonicalName(), e );
61      }
62  
63      @Override
64      public void transferInitiated( TransferEvent event )
65          throws TransferCancelledException
66      {
67          if ( listener != null )
68          {
69              try
70              {
71                  listener.transferInitiated( event );
72              }
73              catch ( RuntimeException | LinkageError e )
74              {
75                  logError( event, e );
76              }
77          }
78      }
79  
80      @Override
81      public void transferStarted( TransferEvent event )
82          throws TransferCancelledException
83      {
84          if ( listener != null )
85          {
86              try
87              {
88                  listener.transferStarted( event );
89              }
90              catch ( RuntimeException | LinkageError e )
91              {
92                  logError( event, e );
93              }
94          }
95      }
96  
97      @Override
98      public void transferProgressed( TransferEvent event )
99          throws TransferCancelledException
100     {
101         if ( listener != null )
102         {
103             try
104             {
105                 listener.transferProgressed( event );
106             }
107             catch ( RuntimeException | LinkageError e )
108             {
109                 logError( event, e );
110             }
111         }
112     }
113 
114     @Override
115     public void transferCorrupted( TransferEvent event )
116         throws TransferCancelledException
117     {
118         if ( listener != null )
119         {
120             try
121             {
122                 listener.transferCorrupted( event );
123             }
124             catch ( RuntimeException | LinkageError e )
125             {
126                 logError( event, e );
127             }
128         }
129     }
130 
131     @Override
132     public void transferSucceeded( TransferEvent event )
133     {
134         if ( listener != null )
135         {
136             try
137             {
138                 listener.transferSucceeded( event );
139             }
140             catch ( RuntimeException | LinkageError e )
141             {
142                 logError( event, e );
143             }
144         }
145     }
146 
147     @Override
148     public void transferFailed( TransferEvent event )
149     {
150         if ( listener != null )
151         {
152             try
153             {
154                 listener.transferFailed( event );
155             }
156             catch ( RuntimeException | LinkageError e )
157             {
158                 logError( event, e );
159             }
160         }
161     }
162 
163 }