/**
* Logback: the generic, reliable, fast and flexible logging framework.
*
* Copyright (C) 2000-2009, QOS.ch
*
* This library is free software, you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation.
*/
package ch.qos.logback.core;
import ch.qos.logback.core.status.Status;
import ch.qos.logback.core.status.WarnStatus;
/**
* ConsoleAppender appends log events to <code>System.out</code> or
* <code>System.err</code> using a layout specified by the user. The default
* target is <code>System.out</code>.
*
* For more information about this appender, please refer to the online manual at
* http://logback.qos.ch/manual/appenders.html#ConsoleAppender
*
* @author Ceki Gülcü
*/
public class ConsoleAppender<E> extends WriterAppender<E> {
public static final String SYSTEM_OUT = "System.out";
public static final String SYSTEM_ERR = "System.err";
protected String target = SYSTEM_OUT;
/**
* As in most logback components, the default constructor does nothing.
*/
public ConsoleAppender() {
}
/**
* Sets the value of the <b>Target</b> option. Recognized values are
* "System.out" and "System.err". Any other value will be ignored.
*/
public void setTarget(String value) {
String v = value.trim();
if (SYSTEM_OUT.equalsIgnoreCase(v)) {
target = SYSTEM_OUT;
} else if (SYSTEM_ERR.equalsIgnoreCase(v)) {
target = SYSTEM_ERR;
} else {
targetWarn(value);
}
}
/**
* Returns the current value of the <b>Target</b> property. The default
* value of the option is "System.out".
*
* See also {@link #setTarget}.
*/
public String getTarget() {
return target;
}
void targetWarn(String val) {
Status status = new WarnStatus("["+val+" should be System.out or System.err.", this);
status.add(new WarnStatus("Using previously set target, System.out by default.", this));
addStatus(status);
}
public void start() {
if (target.equals(SYSTEM_OUT)) {
setWriter(createWriter(System.out));
} else {
setWriter(createWriter(System.err));
}
super.start();
}
/**
* This method overrides the parent {@link WriterAppender#closeWriter}
* implementation because the console stream is not ours to close.
*/
protected final void closeWriter() {
writeFooter();
}
}