/*

 * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package java.util.logging;

/**

 * ErrorManager objects can be attached to Handlers to process

 * any error that occurs on a Handler during Logging.

 * <p>

 * When processing logging output, if a Handler encounters problems

 * then rather than throwing an Exception back to the issuer of

 * the logging call (who is unlikely to be interested) the Handler

 * should call its associated ErrorManager.

 */

public class ErrorManager {

   private boolean reported = false;

    /*

     * We declare standard error codes for important categories of errors.

     */

    /**

     * GENERIC_FAILURE is used for failure that don't fit

     * into one of the other categories.

     */

    public final static int GENERIC_FAILURE = 0;

    /**

     * WRITE_FAILURE is used when a write to an output stream fails.

     */

    public final static int WRITE_FAILURE = 1;

    /**

     * FLUSH_FAILURE is used when a flush to an output stream fails.

     */

    public final static int FLUSH_FAILURE = 2;

    /**

     * CLOSE_FAILURE is used when a close of an output stream fails.

     */

    public final static int CLOSE_FAILURE = 3;

    /**

     * OPEN_FAILURE is used when an open of an output stream fails.

     */

    public final static int OPEN_FAILURE = 4;

    /**

     * FORMAT_FAILURE is used when formatting fails for any reason.

     */

    public final static int FORMAT_FAILURE = 5;

    /**

     * The error method is called when a Handler failure occurs.

     * <p>

     * This method may be overridden in subclasses.  The default

     * behavior in this base class is that the first call is

     * reported to System.err, and subsequent calls are ignored.

     *

     * @param msg    a descriptive string (may be null)

     * @param ex     an exception (may be null)

     * @param code   an error code defined in ErrorManager

     */

    public synchronized void error(String msg, Exception ex, int code) {

        if (reported) {

            // We only report the first error, to avoid clogging

            // the screen.

            return;

        }

        reported = true;

        String text = "java.util.logging.ErrorManager: " + code;

        if (msg != null) {

            text = text + ": " + msg;

        }

        System.err.println(text);

        if (ex != null) {

            ex.printStackTrace();

        }

    }

}