001/*
002 * Copyright 2012-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.cli.util;
018
019/**
020 * Simple logger used by the CLI.
021 *
022 * @author Phillip Webb
023 */
024public abstract class Log {
025
026        private static LogListener listener;
027
028        public static void info(String message) {
029                System.out.println(message);
030                if (listener != null) {
031                        listener.info(message);
032                }
033        }
034
035        public static void infoPrint(String message) {
036                System.out.print(message);
037                if (listener != null) {
038                        listener.infoPrint(message);
039                }
040        }
041
042        public static void error(String message) {
043                System.err.println(message);
044                if (listener != null) {
045                        listener.error(message);
046                }
047        }
048
049        public static void error(Exception ex) {
050                ex.printStackTrace(System.err);
051                if (listener != null) {
052                        listener.error(ex);
053                }
054        }
055
056        static void setListener(LogListener listener) {
057                Log.listener = listener;
058        }
059
060}