www.pudn.com > snmp4jmibbrowser.zip > DwSnmpMibOutputHandler.java

package com.dwipal; 
 
 
import javax.swing.*; 
import java.io.*; 
import java.util.*; 
 
public class DwSnmpMibOutputHandler 
{ 
 
	JTextArea outputText; 
	JTextArea outputError; 
	boolean doLog=false; 
	boolean autoScroll=true; 
	static BufferedWriter outfile; 
 
	DwSnmpMibOutputHandler() { 
	} 
 
	public void setAutoScroll(boolean as) { 
		autoScroll=as; 
	} 
	public void setOutput(JTextArea o) { 
		outputText=o; 
 
	} 
 
	public void setOutputError (JTextArea e) { 
		outputError=e; 
	} 
 
 
        void showErrorMessage(String s) { 
                JOptionPane.showMessageDialog(outputText,s,"Mib Browser",JOptionPane.OK_OPTION); 
        } 
 
 
	public void setLogging(boolean log) { 
 
		try { 
			if(log==true) { 
				String strFileName=getLogFileName(); 
				outfile=new BufferedWriter(new FileWriter(strFileName,true)); 
				outfile.write("\n**********************************************************\n"); 
				outfile.write("MIB Browser Started at : " + new Date()); 
				outfile.write("\n**********************************************************\n"); 
				//System.out.println("Output log file: "+ strFileName); 
				this.doLog=true; 
 
				java.util.Timer  tmr=new java.util.Timer(true); 
				class SnmpTimerTask extends java.util.TimerTask { 
					public void run() { 
						try	{ 
							outfile.flush(); 
						} catch (Exception e) { 
							System.out.println("Error in writing to log file: " + e); 
						} 
					} 
				}; 
				long lFlushTime=getFlushTime(); 
				//System.out.println("Log will be refreshed every " + lFlushTime/1000 + " seconds."); 
				tmr.schedule(new SnmpTimerTask(),lFlushTime,lFlushTime); 
 
 
				Thread thrdFlush=new Thread(new Runnable() { 
					public void run() { 
						try	{ 
							//System.out.println("Have a nice day !!"); 
							outfile.write("\n**********************************************************\n"); 
							outfile.write("MIB Browser Stopped at : " + new Date()); 
							outfile.write("\n**********************************************************\n"); 
							outfile.flush(); 
							outfile.close(); 
						} catch (Exception e) { 
							System.out.println("Error while writing to log file: "+ e); 
						} 
					} 
				}); 
				Runtime.getRuntime().addShutdownHook(thrdFlush); 
 
			} else outfile.close(); 
		}catch(Exception e) { 
			System.out.println("Error : Cannot log" + e.toString()); 
		//	doLog=false; 
			return; 
		} 
		doLog=true; 
	} 
 
	private String getLogFileName() { 
		String strFileName=System.getProperty("logfilename"); 
		if(strFileName==null) { 
			strFileName="mibbrowser.log"; 
		} 
		return strFileName; 
	} 
 
	private long getFlushTime() { 
		long lTime=0; 
		String strTime=System.getProperty("logrefreshtime"); 
		if(strTime!=null) { 
			try	{ 
				lTime=Long.parseLong(strTime); 
				lTime=lTime*1000; 
			} catch (Exception e) { 
				System.out.println("Invalid value for log refresh time. default will be used."); 
			} 
		} 
 
		if(lTime<1000) { // minimum must be 1 second. 
			lTime=60*1000; // default is 1 minute. 
		} 
		return lTime; 
	} 
 
	public void println(String s) { 
		if(outputText !=null )	{ 
			outputText.append("\n"+s); 
			if(autoScroll==true) outputText.setCaretPosition(outputText.getDocument().getLength() - 1); 
		} 
		//else System.out.println(s); 
		try {//if(doLog==true) 
			{ 
				 outfile.write(s+"\n"); 
			 } 
		}catch(Exception e) {System.out.println(e.toString());} 
	} 
 
	public void print(String s) { 
		if(outputText !=null) { 
			outputText.append (s); 
			if(autoScroll==true) outputText.setCaretPosition(outputText.getDocument().getLength() - 1); 
		} 
		else System.out.println(s); 
		try {//if(doLog==true) 
			outfile.write(s); 
		}catch(Exception e) {System.out.println(e.toString());} 
 
	} 
 
	public void printError(String e) { 
		if(outputError!=null) outputError.append("\n"+e); 
		else System.err.println(e); 
		try {//if(doLog==true) 
			outfile.write("\n"+e+"\n"); 
		}catch(Exception ex) {System.out.println(e.toString());} 
 
	} 
}