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1   package org.apache.velocity.runtime.log;
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.apache.velocity.runtime.RuntimeServices;
23  import org.apache.velocity.util.StringUtils;
24  
25  /**
26   * Wrapper to make user's custom LogSystem implementations work
27   * with the new LogChute setup.
28   *
29   * @author <a href="mailto:nbubna@apache.org">Nathan Bubna</a>
30   * @version $Id: LogChuteSystem.java 463298 2006-10-12 16:10:32Z henning $
31   */
32  public class LogChuteSystem implements LogChute
33  {
34  
35      private LogSystem logSystem;
36  
37      /**
38       * Only classes in this package should be creating this.
39       * Users should not have to mess with this class.
40       * @param wrapMe
41       */
42      protected LogChuteSystem(LogSystem wrapMe)
43      {
44          this.logSystem = wrapMe;
45      }
46  
47      /**
48       * @see org.apache.velocity.runtime.log.LogChute#init(org.apache.velocity.runtime.RuntimeServices)
49       */
50      public void init(RuntimeServices rs) throws Exception
51      {
52          logSystem.init(rs);
53      }
54  
55      /**
56       * @see org.apache.velocity.runtime.log.LogChute#log(int, java.lang.String)
57       */
58      public void log(int level, String message)
59      {
60          logSystem.logVelocityMessage(level, message);
61      }
62  
63      /**
64       * First passes off the message at the specified level,
65       * then passes off stack trace of the Throwable as a
66       * 2nd message at the same level.
67       * @param level
68       * @param message
69       * @param t
70       */
71      public void log(int level, String message, Throwable t)
72      {
73          logSystem.logVelocityMessage(level, message);
74          logSystem.logVelocityMessage(level, StringUtils.stackTrace(t));
75      }
76  
77      /**
78       * @see org.apache.velocity.runtime.log.LogChute#isLevelEnabled(int)
79       */
80      public boolean isLevelEnabled(int level)
81      {
82          return true;
83      }
84  
85  }