cli to splot the stat log

core/java/src/net/i2p/stat/StatLogSplitter.java

+package net.i2p.stat;
+
+import java.io.IOException;
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.text.SimpleDateFormat;
+import java.text.ParseException;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+
+/**
+ * Simple CLI to splot the stat logs into per-stat files containing
+ * #seconds since beginning and the value (ready for loading into your
+ * favorite plotting tool)
+ */
+public class StatLogSplitter {
+    private static final String DATE_FORMAT = "yyyyMMdd hh:mm:ss.SSS";
+    private static SimpleDateFormat _fmt = new SimpleDateFormat(DATE_FORMAT);
+    public static void main(String args[]) {
+        if (args.length != 1) {
+            System.err.println("Usage: StatLogSplitter filename");
+            return;
+        }
+        splitLog(args[0]);
+    }
+    
+    private static void splitLog(String filename) {
+        Map outputFiles = new HashMap(4);
+        try {
+            BufferedReader in = new BufferedReader(new FileReader(filename));
+            String line;
+            long first = 0;
+            while ( (line = in.readLine()) != null) {
+                String date = line.substring(0, DATE_FORMAT.length()).trim();
+                int endGroup = line.indexOf(' ', DATE_FORMAT.length()+1);
+                int endStat = line.indexOf(' ', endGroup+1);
+                int endValue = line.indexOf(' ', endStat+1);
+                String group = line.substring(DATE_FORMAT.length()+1, endGroup).trim();
+                String stat = line.substring(endGroup, endStat).trim();
+                String value = line.substring(endStat, endValue).trim();
+                String duration = line.substring(endValue).trim();
+                //System.out.println(date + " " + group + " " + stat + " " + value + " " + duration);
+                
+                try {
+                    Date when = _fmt.parse(date);
+                    if (first <= 0) first = when.getTime();
+                    long val = Long.parseLong(value);
+                    long time = Long.parseLong(duration);
+                    if (!outputFiles.containsKey(stat)) {
+                        outputFiles.put(stat, new FileWriter(stat + ".dat"));
+                        System.out.println("Including data to " + stat + ".dat");
+                    }
+                    FileWriter out = (FileWriter)outputFiles.get(stat);
+                    double s = (when.getTime()-first)/1000.0;
+                    out.write(s + " " + val + "\n");
+                    out.flush();
+                } catch (ParseException pe) {
+                    continue;
+                } catch (NumberFormatException nfe){
+                    continue;
+                }
+            }
+        } catch (IOException ioe) {
+            ioe.printStackTrace();
+        }
+        for (Iterator iter = outputFiles.values().iterator(); iter.hasNext(); ) {
+            FileWriter out = (FileWriter)iter.next();
+            try { out.close(); } catch (IOException ioe) {}
+        }
+    }
+}