| /* |
| * 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 |
| * |
| * 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 static org.fusesource.jansi.Ansi.Attribute.INTENSITY_BOLD; |
| import static org.fusesource.jansi.Ansi.Color; |
| import static org.fusesource.jansi.Ansi.Color.GREEN; |
| import static org.fusesource.jansi.Ansi.Color.RED; |
| import static org.fusesource.jansi.Ansi.ansi; |
| |
| /** |
| * Provides a very, very basic logging API. |
| */ |
| public final class Logger { |
| public static volatile 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) { |
| synchronized (Logger.class) { |
| 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).fg(color).a(level).reset().a(" [").a(name).a("] ").a(msg)); |
| |
| if (cause != null) { |
| cause.printStackTrace(io.out); |
| } |
| |
| io.flush(); |
| } |
| |
| // |
| // 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); |
| } |
| } |