[CIShell-SVN] SF.net SVN: cishell: [376] trunk/clients/gui/org.cishell.reference.gui.log/ src/org/cishell/reference/gui/log/LogToFile.java

[<hu...@us...>]

Revision: 376
          http://svn.sourceforge.net/cishell/?rev=376&view=rev
Author:   huangb
Date:     2007-03-15 14:27:08 -0700 (Thu, 15 Mar 2007)

Log Message:
-----------
initial version to write log records to files

Added Paths:
-----------
    trunk/clients/gui/org.cishell.reference.gui.log/src/org/cishell/reference/gui/log/LogToFile.java

Added: trunk/clients/gui/org.cishell.reference.gui.log/src/org/cishell/reference/gui/log/LogToFile.java
===================================================================
--- trunk/clients/gui/org.cishell.reference.gui.log/src/org/cishell/reference/gui/log/LogToFile.java	                        (rev 0)
+++ trunk/clients/gui/org.cishell.reference.gui.log/src/org/cishell/reference/gui/log/LogToFile.java	2007-03-15 21:27:08 UTC (rev 376)
@@ -0,0 +1,129 @@
+package org.cishell.reference.gui.log;
+
+import java.io.File;
+
+import org.osgi.service.log.LogEntry;
+import org.osgi.service.log.LogListener;
+import org.osgi.service.log.LogService;
+
+import java.util.Calendar;
+import java.util.logging.FileHandler;
+import java.util.logging.Logger;
+import java.util.logging.Level;
+import java.util.logging.SimpleFormatter;
+import java.io.IOException;
+
+/**
+ * This is a basic implementation. It write log records to files
+ * @author Weixia(Bonnie) Huang (hu...@in...)
+ */
+public class LogToFile implements LogListener {
+	//default log directory
+	private static String default_log_dir = 
+		System.getProperty("user.dir") 
+		+ File.separator + "logs";
+	private static String prefix_file_name = "user";
+	
+	private File currentDir;
+	private Logger logger;
+	
+	//Specify the default size of each log file
+	private int limit = 100000; // 100 kb
+	
+	//Specify the default numbers of log files
+	private int max_Number_Of_LogFiles  = 10;
+
+    /**
+     * Constructor
+     */
+    public LogToFile() {
+    	
+    	try {
+            // Create an appending file handler
+    		currentDir = getLogDirectory();
+    		if (currentDir != null){
+    			boolean append = true;
+    			String logFileName = currentDir+File.separator+
+								generateUniqueFile(prefix_file_name)+
+								".%g.log";
+    			
+    			FileHandler handler = new FileHandler(logFileName, 
+            			limit, max_Number_Of_LogFiles, append);
+    			
+    			handler.setFormatter(new SimpleFormatter());
+        
+    			// Add to the desired logger
+    			logger = Logger.getLogger("edu.iu.iv.logger");
+    			logger.addHandler(handler);
+    		}
+        } catch (IOException e) {
+        }
+
+    }
+	
+    public void logged(final LogEntry entry) {
+    	String message = entry.getMessage();
+    	
+    	if (goodMessage(message)){
+    		logger.log(Level.INFO, message+"\n");
+    	}
+    }
+    
+    private boolean goodMessage(String msg) {
+        if (msg == null || 
+                msg.startsWith("ServiceEvent ") || 
+                msg.startsWith("BundleEvent ") || 
+                msg.startsWith("FrameworkEvent ")) {
+            return false;
+        } else {
+            return true;   
+        }
+    }
+
+    private static File getLogDirectory(){    	
+    	//later, we should get the log directory from preference service
+    	File logDir = new File(default_log_dir);
+    	if (!logDir.exists() || !logDir.isDirectory()){  
+    		try{
+    			if (logDir.mkdir()){
+    				return logDir;
+    			} else {
+    				return new File (default_log_dir);
+    			}
+    		}catch (Exception e){
+    			e.printStackTrace();
+    			return new File (default_log_dir);
+    		}
+    		
+    	}else
+    		return logDir;		
+            
+    }
+    
+    /*
+     * create log file with given name plus unique timestamp
+     */
+    private String generateUniqueFile(String prefixFN) {
+ 
+        Calendar now = Calendar.getInstance();
+        String month = (now.get(Calendar.MONTH) + 1) + ""; //zero based
+
+        if (month.length() == 1) {
+            month = "0" + month;
+        }
+
+        String day = now.get(Calendar.DAY_OF_MONTH) + "";
+
+        if (day.length() == 1) {
+            day = "0" + day;
+        }
+
+        String year = now.get(Calendar.YEAR) + "";
+        
+        String timestamp = "-" + month + "-" + day + "-" + year + "-"+
+        		System.currentTimeMillis();
+        return prefixFN+timestamp;        
+        
+    }
+
+}


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