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| 1 | /* | ||
| 2 | * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | |||
| 27 | package java.util.logging; | ||
| 28 | |||
| 29 | /** | ||
| 30 | * ErrorManager objects can be attached to Handlers to process | ||
| 31 | * any error that occurs on a Handler during Logging. | ||
| 32 | * <p> | ||
| 33 | * When processing logging output, if a Handler encounters problems | ||
| 34 | * then rather than throwing an Exception back to the issuer of | ||
| 35 | * the logging call (who is unlikely to be interested) the Handler | ||
| 36 | * should call its associated ErrorManager. | ||
| 37 | */ | ||
| 38 | |||
| 39 | public class ErrorManager { | ||
| 40 | private boolean reported = false; | ||
| 41 | |||
| 42 | /* | ||
| 43 | * We declare standard error codes for important categories of errors. | ||
| 44 | */ | ||
| 45 | |||
| 46 | /** | ||
| 47 | * GENERIC_FAILURE is used for failure that don't fit | ||
| 48 | * into one of the other categories. | ||
| 49 | */ | ||
| 50 | public final static int GENERIC_FAILURE = 0; | ||
| 51 | /** | ||
| 52 | * WRITE_FAILURE is used when a write to an output stream fails. | ||
| 53 | */ | ||
| 54 | public final static int WRITE_FAILURE = 1; | ||
| 55 | /** | ||
| 56 | * FLUSH_FAILURE is used when a flush to an output stream fails. | ||
| 57 | */ | ||
| 58 | public final static int FLUSH_FAILURE = 2; | ||
| 59 | /** | ||
| 60 | * CLOSE_FAILURE is used when a close of an output stream fails. | ||
| 61 | */ | ||
| 62 | public final static int CLOSE_FAILURE = 3; | ||
| 63 | /** | ||
| 64 | * OPEN_FAILURE is used when an open of an output stream fails. | ||
| 65 | */ | ||
| 66 | public final static int OPEN_FAILURE = 4; | ||
| 67 | /** | ||
| 68 | * FORMAT_FAILURE is used when formatting fails for any reason. | ||
| 69 | */ | ||
| 70 | public final static int FORMAT_FAILURE = 5; | ||
| 71 | |||
| 72 | /** | ||
| 73 | * The error method is called when a Handler failure occurs. | ||
| 74 | * <p> | ||
| 75 | * This method may be overridden in subclasses. The default | ||
| 76 | * behavior in this base class is that the first call is | ||
| 77 | * reported to System.err, and subsequent calls are ignored. | ||
| 78 | * | ||
| 79 | * @param msg a descriptive string (may be null) | ||
| 80 | * @param ex an exception (may be null) | ||
| 81 | * @param code an error code defined in ErrorManager | ||
| 82 | */ | ||
| 83 | public synchronized void error(String msg, Exception ex, int code) { | ||
| 84 | if (reported) { | ||
| 85 | // We only report the first error, to avoid clogging | ||
| 86 | // the screen. | ||
| 87 | return; | ||
| 88 | } | ||
| 89 | reported = true; | ||
| 90 | String text = "java.util.logging.ErrorManager: " + code; | ||
| 91 | if (msg != null) { | ||
| 92 | text = text + ": " + msg; | ||
| 93 | } | ||
| 94 | System.err.println(text); | ||
| 95 | if (ex != null) { | ||
| 96 | ex.printStackTrace(); | ||
| 97 | } | ||
| 98 | } | ||
| 99 | } | ||