/* Copyright (c) 2001-2016, 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 Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.0
* @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
StringBuffer sb;
public
SimpleLog(
String path, int
level, boolean
isSQL) {
this.
isSystem =
path == null;
this.
filePath =
path;
this.
isSQL =
isSQL;
logTypeNames =
isSQL ?
sqlLogTypeNames
:
appLogTypeNames;
sb = new
StringBuffer(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(
HsqlDateTime.
getSystemTimeString()).
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(
HsqlDateTime.
getSystemTimeString()).
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(
HsqlDateTime.
getSystemTimeString()).
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;
}
}