From 1a8e84ba9049e0b99f944ca3ed7c781d6fc88956 Mon Sep 17 00:00:00 2001
From: Harald Wolff <haraldwolff@homework.praeziso.lupus>
Date: Tue, 6 Sep 2016 11:53:15 +0200
Subject: [PATCH] org.hwo.Logging neu

---
 src/org/hwo/logging/LogLevel.java |   9 ++
 src/org/hwo/logging/Logging.java  | 138 ++++++++++++++++++++++++++++++
 2 files changed, 147 insertions(+)
 create mode 100644 src/org/hwo/logging/LogLevel.java
 create mode 100644 src/org/hwo/logging/Logging.java

diff --git a/src/org/hwo/logging/LogLevel.java b/src/org/hwo/logging/LogLevel.java
new file mode 100644
index 0000000..fa2f789
--- /dev/null
+++ b/src/org/hwo/logging/LogLevel.java
@@ -0,0 +1,9 @@
+package org.hwo.logging;
+
+public enum LogLevel {
+	INFO(1),WARN(3),ERROR(5),FATAL(10),DEBUG(25);
+	
+	private final int n;
+	LogLevel(int l){ n=l; };
+	public int getLevel(){ return n; }
+}
diff --git a/src/org/hwo/logging/Logging.java b/src/org/hwo/logging/Logging.java
new file mode 100644
index 0000000..8e3f3cd
--- /dev/null
+++ b/src/org/hwo/logging/Logging.java
@@ -0,0 +1,138 @@
+package org.hwo.logging;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.text.DateFormat;
+import java.util.Date;
+
+public class Logging {
+
+	private static Logging _inst;
+	private static PrintStream	liveStream;
+	
+	
+	private PrintStream	logStream;
+	private final DateFormat dateFormat;
+	
+	public Logging(String filename){
+		dateFormat = DateFormat.getDateTimeInstance();
+		try {
+			
+			File f = new File(filename);
+			File fold = new File(String.format("%s.old", filename));
+			
+			if (fold.exists()){
+				fold.delete();
+			}
+			
+			if (f.exists()){
+				f.renameTo(fold);
+			}
+			
+			logStream = new PrintStream(filename);
+
+		} catch (FileNotFoundException e) {
+			liveStream.println("----!!!!! LOGGING ERROR !!!!!-----");
+			e.printStackTrace();
+		}
+
+		System.setErr(new PrintStream(new LoggingOutputStream(LogLevel.ERROR)));
+		System.setOut(new PrintStream(new LoggingOutputStream(LogLevel.INFO)));
+		
+	}
+	
+	private void _log(LogLevel logLevel,String message){
+		String formattedLine;
+		
+		formattedLine = String.format("%s [%-8s] %s", dateFormat.format(new Date()),logLevel.toString(),message);
+		
+		logStream.println(formattedLine);
+		logStream.flush();
+		
+		if (liveStream != null){
+			liveStream.println(formattedLine);
+			liveStream.flush();
+		}
+	}
+	
+	
+	static public void setLogFileName(String logFileName){
+		_inst = new Logging(logFileName);
+	}
+	
+	static public void log(LogLevel logLevel,String message){
+		if (_inst == null){
+			_inst = new Logging("application.log");
+		}
+		_inst._log(logLevel, message);
+	}
+	
+	static public void log(String message){
+		log(LogLevel.INFO,message);
+	}
+	
+	static public void log(LogLevel logLevel,String message,Object... args){
+		log(logLevel,String.format(message, args));
+	}
+
+	static public void log(String message,Object... args){
+		log(LogLevel.INFO,message,args);
+	}
+
+	static {
+		liveStream = System.out;
+	}
+	
+	
+	public class LoggingOutputStream extends OutputStream {
+
+		byte[]	buffer;
+		int		bufferPosition;
+		
+		LogLevel
+				logLevel;
+		
+		public LoggingOutputStream() {
+			buffer = new byte[4096];
+			bufferPosition = 0;
+			this.logLevel = LogLevel.INFO;
+		}
+
+		public LoggingOutputStream(LogLevel logLevel) {
+			buffer = new byte[4096];
+			bufferPosition = 0;
+			this.logLevel = logLevel;
+		}
+		
+		@Override
+		public void flush(){
+			if (bufferPosition > 0){
+				_log(this.logLevel,new String(buffer,0,bufferPosition));
+				bufferPosition = 0;
+			};
+		}
+		
+		@Override
+		public void write(int b) throws IOException {
+			if (b == 0x0A){
+				
+				flush();
+				
+			} else {
+				buffer[bufferPosition++] = new Integer(b).byteValue();
+				
+				if (bufferPosition == buffer.length){
+					flush();
+				}
+			};
+			
+		}
+		
+		
+		
+	}
+	
+}