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/*
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* Copyright 2021 the original author or authors.
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
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* applicable law or agreed to in writing, software distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
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* OF ANY KIND, either express or implied. See the License for the specific
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* language governing permissions and limitations under the License.
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*/
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package com.gitee.drinkjava2.frog.util;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.nio.charset.StandardCharsets;
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import java.text.SimpleDateFormat;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.ArrayBlockingQueue;
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import java.util.concurrent.BlockingQueue;
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/**
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* Usually a logger tool is used like below:
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* Logger log = LoggerFactory.getLogger(Xxxx.class);
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* log.info("some msg");
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*
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* But to simplify, in this project directly use static method:
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* Logger.info("some msg");
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*
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* @Description: 简版控制台日志打印，从码云上合并来，见 https://gitee.com/drinkjava2/frog/pulls/4
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* @author 栾成翔
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* @Date: 2021/12/07
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*/
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@SuppressWarnings("all")
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public class Logger {
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private static final int LOGGER_STYLE = 0; //风格设定， 0:不输出前缀, 1:输出时间、类、行号等前缀
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private static final String LEV_EL = "debug";
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private static final int LEVEL_INT;
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private static final BlockingQueue<String> LOG_LIST = new ArrayBlockingQueue<>(256);
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private static final SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS");
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private static final OutputStream OUTPUT_STREAM = System.out;
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private static final String LINE_SEPARATOR = System.getProperty("line.separator");
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private static final String DELIM_STR = "{}";
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private static final String TAB = "\tat";
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private static final Map<String, Integer> LEVEL_MAP = new HashMap<>();
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static {
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LEVEL_MAP.put("DEBUG", 1);
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LEVEL_MAP.put("INFO", 2);
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LEVEL_MAP.put("WARN", 2);
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LEVEL_MAP.put("ERROR", 2);
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LEVEL_INT = LEVEL_MAP.get(LEV_EL.toUpperCase());
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new Thread(() -> {
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while (true) {
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try {
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outPutConsole(LOG_LIST.take());
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} catch (InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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}).start();
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}
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public static void debug(String msg) {
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printLog(LEVEL_MAP.get("DEBUG"), msg);
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}
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public static void debug(String msg, Object params) {
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printLog(LEVEL_MAP.get("DEBUG"), msg, params);
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}
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public static void debug(String msg, Object... params) {
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printLog(LEVEL_MAP.get("DEBUG"), msg, params);
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}
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public static void info(String msg) {
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printLog(LEVEL_MAP.get("INFO"), msg);
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}
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public static void info(String msg, Object params) {
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printLog(LEVEL_MAP.get("INFO"), msg, params);
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}
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public static void info(String msg, Object... params) {
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printLog(LEVEL_MAP.get("INFO"), msg, params);
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}
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public static void warn(String msg) {
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printLog(LEVEL_MAP.get("WARN"), msg);
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}
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public static void warn(String msg, Object params) {
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printLog(LEVEL_MAP.get("WARN"), msg, params);
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}
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public static void warn(String msg, Object... params) {
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printLog(LEVEL_MAP.get("WARN"), msg, params);
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}
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public static void error(String msg) {
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printLog(LEVEL_MAP.get("ERROR"), msg);
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}
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public static void error(String msg, Object params) {
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printLog(LEVEL_MAP.get("ERROR"), msg, params);
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}
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public static void error(String msg, Object... params) {
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printLog(LEVEL_MAP.get("ERROR"), msg, params);
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}
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public static void error(Object param) {
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printLog(LEVEL_MAP.get("ERROR"), "", param);
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}
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private static void printLog(int levelInt, String msg, Object... params) {
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try {
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if (levelInt >= LEVEL_INT) {
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LOG_LIST.put(generateMsg(getLevelStr(levelInt), msg, params));
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}
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private static String generateMsg(String levelStr, String msg, Object... params) {
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if(LOGGER_STYLE==0)
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return formatMsg(msg+ LINE_SEPARATOR, null, params);
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StackTraceElement stack = Thread.currentThread().getStackTrace()[4];
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String s = "{} [{}][{}#{} {}] - " + msg + LINE_SEPARATOR;
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Object[] args = new Object[5 + params.length];
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args[0] = FORMAT.format(System.currentTimeMillis());
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args[1] = levelStr;
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args[2] = stack.getClassName();
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args[3] = stack.getMethodName();
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args[4] = stack.getLineNumber();
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Throwable throwable = null;
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if (params.length > 0) {
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final Object lastEntry = params[params.length - 1];
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if (lastEntry instanceof Throwable) {
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throwable = (Throwable) lastEntry;
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System.arraycopy(params, 0, args, 5, params.length - 1);
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} else {
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System.arraycopy(params, 0, args, 5, params.length);
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}
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}
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return formatMsg(s, throwable, args);
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}
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private static String formatMsg(String msg, Throwable throwable, Object... params) {
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StringBuilder sb = new StringBuilder();
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int s;
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int i = 0;
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for (Object o : params) {
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s = msg.indexOf(DELIM_STR, i);
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if (s > -1) {
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sb.append(msg, i, s).append(o);
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i = s + 2;
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}
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}
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sb.append(msg, i, msg.length());
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if (null != throwable) {
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sb.append(throwable).append(LINE_SEPARATOR);
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StackTraceElement[] stack = throwable.getStackTrace();
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for (StackTraceElement element : stack) {
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sb.append(TAB).append(element).append(LINE_SEPARATOR);
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}
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}
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return sb.toString();
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}
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private static void outPutConsole(String msg) {
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try {
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OUTPUT_STREAM.write(msg.getBytes(StandardCharsets.UTF_8));
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OUTPUT_STREAM.flush();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private static String getLevelStr(int levelInt) {
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switch (levelInt) {
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case 1:
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return "DEBUG";
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case 2:
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return "INFO";
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case 3:
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return "WARN";
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case 4:
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return "ERROR";
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default:
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throw new IllegalStateException("Level " + levelInt + " is unknown.");
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}
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}
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}
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