01: /********************************************************************************
02: * CruiseControl, a Continuous Integration Toolkit
03: * Copyright (c) 2007, ThoughtWorks, Inc.
04: * 200 E. Randolph, 25th Floor
05: * Chicago, IL 60601 USA
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * modification, are permitted provided that the following conditions
10: * are met:
11: *
12: * + Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: *
15: * + Redistributions in binary form must reproduce the above
16: * copyright notice, this list of conditions and the following
17: * disclaimer in the documentation and/or other materials provided
18: * with the distribution.
19: *
20: * + Neither the name of ThoughtWorks, Inc., CruiseControl, nor the
21: * names of its contributors may be used to endorse or promote
22: * products derived from this software without specific prior
23: * written permission.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
29: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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36: ********************************************************************************/package net.sourceforge.cruisecontrol;
37:
38: import net.sourceforge.cruisecontrol.util.BuildOutputLogger;
39:
40: import java.io.File;
41:
42: /**
43: * Lazy load a BuildOutputLogger.
44: */
45: public class BuildOutputLoggerManager {
46:
47: public static final BuildOutputLoggerManager INSTANCE = new BuildOutputLoggerManager();
48:
49: private BuildOutputLogger logger;
50:
51: BuildOutputLoggerManager() {
52: }
53:
54: /**
55: * If we haven't already created one, create a temporary BuildOutputLogger to retrieve empty lines.
56: * @return Either logger or a temporary empty logger.
57: */
58: public BuildOutputLogger lookup() {
59: if (logger != null) {
60: return logger;
61: }
62: return new BuildOutputLogger(null);
63: }
64:
65: public BuildOutputLogger lookupOrCreate(File outputFile) {
66: if (logger == null) {
67: logger = new BuildOutputLogger(outputFile);
68: }
69: return logger;
70: }
71: }
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