100 lines
3.5 KiB
Java
100 lines
3.5 KiB
Java
/*
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* Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.logging;
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/**
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* ErrorManager objects can be attached to Handlers to process
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* any error that occurs on a Handler during Logging.
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* <p>
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* When processing logging output, if a Handler encounters problems
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* then rather than throwing an Exception back to the issuer of
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* the logging call (who is unlikely to be interested) the Handler
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* should call its associated ErrorManager.
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*/
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public class ErrorManager {
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private boolean reported = false;
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/*
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* We declare standard error codes for important categories of errors.
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*/
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/**
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* GENERIC_FAILURE is used for failure that don't fit
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* into one of the other categories.
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*/
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public final static int GENERIC_FAILURE = 0;
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/**
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* WRITE_FAILURE is used when a write to an output stream fails.
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*/
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public final static int WRITE_FAILURE = 1;
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/**
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* FLUSH_FAILURE is used when a flush to an output stream fails.
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*/
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public final static int FLUSH_FAILURE = 2;
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/**
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* CLOSE_FAILURE is used when a close of an output stream fails.
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*/
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public final static int CLOSE_FAILURE = 3;
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/**
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* OPEN_FAILURE is used when an open of an output stream fails.
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*/
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public final static int OPEN_FAILURE = 4;
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/**
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* FORMAT_FAILURE is used when formatting fails for any reason.
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*/
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public final static int FORMAT_FAILURE = 5;
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/**
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* The error method is called when a Handler failure occurs.
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* <p>
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* This method may be overridden in subclasses. The default
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* behavior in this base class is that the first call is
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* reported to System.err, and subsequent calls are ignored.
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*
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* @param msg a descriptive string (may be null)
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* @param ex an exception (may be null)
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* @param code an error code defined in ErrorManager
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*/
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public synchronized void error(String msg, Exception ex, int code) {
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if (reported) {
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// We only report the first error, to avoid clogging
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// the screen.
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return;
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}
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reported = true;
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String text = "java.util.logging.ErrorManager: " + code;
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if (msg != null) {
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text = text + ": " + msg;
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}
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System.err.println(text);
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if (ex != null) {
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ex.printStackTrace();
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}
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}
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}
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