1 //
2 // ========================================================================
3 // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.util.log;
20
21 import java.util.HashSet;
22 import java.util.Set;
23
24 /**
25 * A try-with-resources compatible layer for {@link StdErrLog#setHideStacks(boolean) hiding stacktraces} within the scope of the <code>try</code> block when
26 * logging with {@link StdErrLog} implementation.
27 * <p>
28 * Use of other logging implementation cause no effect when using this class
29 * <p>
30 * Example:
31 *
32 * <pre>
33 * try (StacklessLogging scope = new StacklessLogging(EventDriver.class,Noisy.class))
34 * {
35 * doActionThatCausesStackTraces();
36 * }
37 * </pre>
38 */
39 public class StacklessLogging implements AutoCloseable
40 {
41 private final Set<StdErrLog> squelched = new HashSet<>();
42
43 public StacklessLogging(Class<?>... classesToSquelch)
44 {
45 for (Class<?> clazz : classesToSquelch)
46 {
47 Logger log = Log.getLogger(clazz);
48 // only operate on loggers that are of type StdErrLog
49 if (log instanceof StdErrLog)
50 {
51 StdErrLog stdErrLog=((StdErrLog)log);
52 if (!stdErrLog.isHideStacks())
53 {
54 stdErrLog.setHideStacks(true);
55 squelched.add(stdErrLog);
56 }
57 }
58 }
59 }
60
61 public StacklessLogging(Logger... logs)
62 {
63 for (Logger log : logs)
64 {
65 // only operate on loggers that are of type StdErrLog
66 if (log instanceof StdErrLog)
67 {
68 StdErrLog stdErrLog=((StdErrLog)log);
69 if (!stdErrLog.isHideStacks())
70 {
71 stdErrLog.setHideStacks(true);
72 squelched.add(stdErrLog);
73 }
74 }
75 }
76 }
77
78 @Override
79 public void close()
80 {
81 for (StdErrLog log : squelched)
82 log.setHideStacks(false);
83 }
84 }