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/* Copyright (c) 2001-2021, The HSQL Development Group
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*
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*
* Redistributions of source code must retain the above copyright notice, this
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*
* Redistributions in binary form must reproduce the above copyright notice,
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*
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.hsqldb.lib;
import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import org.hsqldb.HsqlDateTime.SystemTimeString;
/**
* Simple log for recording abnormal events in persistence
* Log levels, LOG_NONE, LOG_ERROR, and LOG_NORMAL are currently supported.
* 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 Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.5.0
* @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;
public static final int LOG_DETAIL = 3;
public static final int LOG_RESULT = 4;
//
public static final String logTypeNameEngine = "ENGINE";
static final String[] appLogTypeNames = {
"", "ERROR ", "NORMAL", "DETAIL"
};
static final String[] sqlLogTypeNames = {
"", "BASIC ", "NORMAL", "DETAIL", "RESULT"
};
//
private PrintWriter writer;
private int level;
private boolean isSystem;
private boolean isSQL;
String[] logTypeNames;
private String filePath;
private StringBuilder sb;
SystemTimeString sysTime = new SystemTimeString();
public SimpleLog(String path, int level, boolean isSQL) {
this.isSystem = path == null;
this.filePath = path;
this.isSQL = isSQL;
logTypeNames = isSQL ? sqlLogTypeNames
: appLogTypeNames;
sb = new StringBuilder(256);
setLevel(level);
}
private void setupWriter() {
if (level == LOG_NONE) {
close();
return;
}
if (writer == null) {
if (isSystem) {
writer = new PrintWriter(System.out);
} else {
File file = new File(filePath);
setupLog(file);
}
}
}
private void setupLog(File file) {
try {
FileUtil.getFileUtil().makeParentDirectories(file);
writer = new PrintWriter(new FileWriter(file, true), true);
} catch (Exception e) {
isSystem = true;
writer = new PrintWriter(System.out);
}
}
public int getLevel() {
return level;
}
public void setLevel(int level) {
this.level = level;
setupWriter();
}
public PrintWriter getPrintWriter() {
return writer;
}
public synchronized void logContext(int atLevel, String message) {
if (level < atLevel) {
return;
}
if (writer == null) {
return;
}
sb.append(sysTime.getTimestampString()).append(' ');
if (!isSQL) {
sb.append(logTypeNames[atLevel]).append(' ');
}
sb.append(message);
writer.println(sb.toString());
sb.setLength(0);
writer.flush();
}
public synchronized void logContext(int atLevel, String prefix,
String message, String suffix) {
if (level < atLevel) {
return;
}
if (writer == null) {
return;
}
sb.append(sysTime.getTimestampString()).append(' ');
if (!isSQL) {
sb.append(logTypeNames[atLevel]).append(' ');
}
sb.append(prefix).append(' ');
sb.append(message).append(' ').append(suffix);
writer.println(sb.toString());
sb.setLength(0);
writer.flush();
}
public synchronized void logContext(Throwable t, String message,
int atLevel) {
if (level == LOG_NONE) {
return;
}
if (writer == null) {
return;
}
sb.append(sysTime.getTimestampString()).append(' ');
if (!isSQL) {
sb.append(logTypeNames[atLevel]).append(' ');
}
sb.append(message);
Throwable temp = new Throwable();
StackTraceElement[] elements = temp.getStackTrace();
if (elements.length > 1) {
sb.append(' ');
sb.append(elements[1].getClassName()).append('.');
sb.append(elements[1].getMethodName());
}
elements = t.getStackTrace();
if (elements.length > 0) {
sb.append(' ');
sb.append(elements[0].getClassName()).append('.');
sb.append(' ').append(elements[0].getMethodName());
}
sb.append(' ').append(t.toString());
writer.println(sb.toString());
sb.setLength(0);
writer.flush();
}
public void flush() {
if (writer != null) {
writer.flush();
}
}
public void close() {
if (writer != null && !isSystem) {
writer.flush();
writer.close();
}
writer = null;
}
}