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HSQLDB example source code file (SimpleLog.java)
The HSQLDB SimpleLog.java source code/* Copyright (c) 2001-2008, The HSQL Development Group * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the HSQL Development Group nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG, * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.hsqldb.lib; import java.io.File; import java.io.FileWriter; import java.io.PrintWriter; import org.hsqldb.HsqlDateTime; /** * Simple log for recording abnormal events in persistence<p> * Log levels, LOG_NONE, LOG_ERROR, and LOG_NORMAL are currently supported.<p> * LOG_ERROR corresponds to property value 1 and logs main database events plus * any major errors encountered in operation. * LOG_NORMAL corresponds to property value 2 and logs additional normal events * and minor errors. * * @author fredt@users * @version 1.8.0 * @since 1.8.0 */ public class SimpleLog { public static final int LOG_NONE = 0; public static final int LOG_ERROR = 1; public static final int LOG_NORMAL = 2; private PrintWriter writer; private int level; private boolean isSystem; public SimpleLog(String path, int level, boolean useFile) { this.level = level; if (level != LOG_NONE) { if (useFile) { File file = new File(path); makeLog(file); } else { isSystem = true; writer = new PrintWriter(System.out); } } } private void makeLog(File file) { try { FileUtil.getDefaultInstance().makeParentDirectories(file); writer = new PrintWriter(new FileWriter(file.getPath(), true), true); } catch (Exception e) { isSystem = true; writer = new PrintWriter(System.out); } } public int getLevel() { return level; } public PrintWriter getPrintWriter() { return writer; } public synchronized void sendLine(int atLevel, String message) { if (level >= atLevel) { writer.println(HsqlDateTime.getSytemTimeString() + " " + message); } } public synchronized void logContext(int atLevel, String message) { if (level < atLevel) { return; } String info = HsqlDateTime.getSytemTimeString(); //#ifdef JAVA4 Throwable temp = new Throwable(); StackTraceElement[] elements = temp.getStackTrace(); if (elements.length > 1) { info += " " + elements[1].getClassName() + "." + elements[1].getMethodName(); } //#endif JAVA4 writer.println(info + " " + message); } public synchronized void logContext(Throwable t, String message) { if (level == LOG_NONE) { return; } String info = HsqlDateTime.getSytemTimeString(); //#ifdef JAVA4 Throwable temp = new Throwable(); StackTraceElement[] elements = temp.getStackTrace(); if (elements.length > 1) { info += " " + elements[1].getClassName() + "." + elements[1].getMethodName(); } elements = t.getStackTrace(); if (elements.length > 0) { info += " " + elements[0].getClassName() + "." + elements[0].getMethodName(); } //#endif JAVA4 if (message == null) { message = ""; } writer.println(info + " " + t.toString() + " " + message); } public void flush() { if (writer != null) { writer.flush(); } } public void close() { if (writer != null && !isSystem) { writer.close(); } writer = null; } } Other HSQLDB examples (source code examples)Here is a short list of links related to this HSQLDB SimpleLog.java source code file: |
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