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annotate src/org/tmatesoft/hg/util/LogFacility.java @ 456:909306e412e2

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Refactor LogFacility and SessionContext, better API for both
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 18 Jun 2012 16:54:00 +0200
parents 981f9f50bb6c
children
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.util;
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18
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19
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20 /**
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21 * Facility to dump various messages.
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22 *
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23 * Intention of this class is to abstract away almost any log facility out there clients might be using with the <b>Hg4J</b> library,
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24 * not to be a full-fledged logging facility of its own.
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25 *
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26 * Implementations may wrap platform- or application-specific loggers, e.g. {@link java.util.logging.Logger} or
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27 * <code>org.eclipse.core.runtime.ILog</code>
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28 *
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29 * @author Artem Tikhomirov
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30 * @author TMate Software Ltd.
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31 */
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32 public interface LogFacility {
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33
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34 public enum Severity {
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35 Debug, Info, Warn, Error // order is important
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36 }
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37
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38 /**
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39 * Effective way to avoid attempts to construct debug dumps when they are of no interest. Basically, <code>getLevel() < Info</code>
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40 *
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41 * @return <code>true</code> if interested in debug dumps
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42 */
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43 boolean isDebug();
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44
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45 /**
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46 *
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47 * @return lowest (from {@link Severity#Debug} to {@link Severity#Error} active severity level
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48 */
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49 Severity getLevel();
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50
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51 /**
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52 * Dump a message
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53 * @param src identifies source of the message, never <code>null</code>
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54 * @param severity one of predefined levels
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55 * @param format message format suitable for {@link String#format(String, Object...)}, never <code>null</code>
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56 * @param args optional arguments for the preceding format argument, may be <code>null</code>
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57 */
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58 void dump(Class<?> src, Severity severity, String format, Object... args);
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59
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60 /**
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61 * Alternative to dump an exception
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62 *
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63 * @param src identifies source of the message, never <code>null</code>
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64 * @param severity one of predefined levels
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65 * @param th original exception, never <code>null</code>
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66 * @param message additional description of the error/conditions, may be <code>null</code>
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67 */
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68 void dump(Class<?> src, Severity severity, Throwable th, String message);
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69 }