/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.postgresql.util;
import java.io.
Writer;
import java.util.logging.
ErrorManager;
import java.util.logging.
Formatter;
import java.util.logging.
Handler;
import java.util.logging.
Level;
import java.util.logging.
LogRecord;
import java.util.logging.
SimpleFormatter;
public class
WriterHandler extends
Handler {
private boolean
doneHeader;
private
Writer writer;
public
WriterHandler(
Writer inWriter) {
super();
setLevel(
Level.
INFO);
setFilter(null);
setFormatter(new
SimpleFormatter());
writer =
inWriter;
}
public
WriterHandler(
Writer inWriter,
Formatter formatter) {
super();
setLevel(
Level.
INFO);
setFilter(null);
setFormatter(
formatter);
writer =
inWriter;
}
public synchronized void
publish(final
LogRecord record) {
if (!
isLoggable(
record)) {
return;
}
String msg;
try {
msg =
getFormatter().
format(
record);
} catch (
Exception ex) {
// We don't want to throw an exception here, but we
// report the exception to any registered ErrorManager.
reportError(null,
ex,
ErrorManager.
FORMAT_FAILURE);
return;
}
try {
if (!
doneHeader) {
writer.
write(
getFormatter().
getHead(this));
doneHeader = true;
}
writer.
write(
msg);
} catch (
Exception ex) {
// We don't want to throw an exception here, but we
// report the exception to any registered ErrorManager.
reportError(null,
ex,
ErrorManager.
WRITE_FAILURE);
}
}
public boolean
isLoggable(final
LogRecord record) {
if (
writer == null ||
record == null) {
return false;
}
return super.isLoggable(
record);
}
public synchronized void
flush() {
if (
writer != null) {
try {
writer.
flush();
} catch (
Exception ex) {
// We don't want to throw an exception here, but we
// report the exception to any registered ErrorManager.
reportError(null,
ex,
ErrorManager.
FLUSH_FAILURE);
}
}
}
private synchronized void
flushAndClose() throws
SecurityException {
if (
writer != null) {
try {
if (!
doneHeader) {
writer.
write(
getFormatter().
getHead(this));
doneHeader = true;
}
writer.
write(
getFormatter().
getTail(this));
writer.
flush();
writer.
close();
} catch (
Exception ex) {
// We don't want to throw an exception here, but we
// report the exception to any registered ErrorManager.
reportError(null,
ex,
ErrorManager.
CLOSE_FAILURE);
}
writer = null;
}
}
public synchronized void
close() throws
SecurityException {
flushAndClose();
}
}