/*
* Copyright 2003-2007 the original author or authors.
*
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.codehaus.groovy.tools.shell.util;
import org.codehaus.groovy.tools.shell.IO;
import java.io.IOException;
import static org.fusesource.jansi.Ansi.ansi;
import static org.fusesource.jansi.Ansi.Color;
import static org.fusesource.jansi.Ansi.Color.*;
import static org.fusesource.jansi.Ansi.Attribute.*;
/**
* Provides a very, very basic logging API.
*
* @version $Id: Logger.java 20937 2010-10-11 20:01:54Z paulk $
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
*/
public final class Logger {
public static IO io;
public final String name;
private Logger(final String name) {
assert name != null;
this.name = name;
}
private void log(final String level, Object msg, Throwable cause) {
assert level != null;
assert msg != null;
if (io == null) {
io = new IO();
}
// Allow the msg to be a Throwable, and handle it properly if no cause is given
if (cause == null) {
if (msg instanceof Throwable) {
cause = (Throwable) msg;
msg = cause.getMessage();
}
}
Color color = GREEN;
if (WARN.equals(level) || ERROR.equals(level)) {
color = RED;
}
io.out.println(ansi().a(INTENSITY_BOLD).a(color).a(level).reset().a(" [").a(name).a("] ").a(msg));
if (cause != null) {
cause.printStackTrace(io.out);
}
try {
io.flush();
} catch (IOException io) {
throw new RuntimeException(io);
}
}
//
// Level helpers
//
private static final String DEBUG = "DEBUG";
public boolean isDebugEnabled() {
return Preferences.verbosity == IO.Verbosity.DEBUG;
}
public boolean isDebug() {
return isDebugEnabled();
}
public void debug(final Object msg) {
if (isDebugEnabled()) {
log(DEBUG, msg, null);
}
}
public void debug(final Object msg, final Throwable cause) {
if (isDebugEnabled()) {
log(DEBUG, msg, cause);
}
}
private static final String WARN = "WARN";
public void warn(final Object msg) {
log(WARN, msg, null);
}
public void warn(final Object msg, final Throwable cause) {
log(WARN, msg, cause);
}
private static final String ERROR = "ERROR";
public void error(final Object msg) {
log(ERROR, msg, null);
}
public void error(final Object msg, final Throwable cause) {
log(ERROR, msg, cause);
}
//
// Factory access
//
public static Logger create(final Class type) {
return new Logger(type.getName());
}
public static Logger create(final Class type, final String suffix) {
return new Logger(type.getName() + "." + suffix);
}
}