From: adam <adam@megacz.com>
Date: Sat, 3 Jul 2004 01:28:43 +0000 (+0000)
Subject: added Log.note() and ability to set prefs via properties
X-Git-Url: http://git.megacz.com/?p=org.ibex.core.git;a=commitdiff_plain;h=18d9f2761f160801561628d548e2c792f88afe65

added Log.note() and ability to set prefs via properties

darcs-hash:20040703012843-5007d-3a0a95bb53800ead2f6c3e87993631185403ddd7.gz
---

diff --git a/src/org/ibex/util/Log.java b/src/org/ibex/util/Log.java
index d2bca77..70f1054 100644
--- a/src/org/ibex/util/Log.java
+++ b/src/org/ibex/util/Log.java
@@ -14,11 +14,13 @@ import java.net.*;
 /** easy to use logger */
 public class Log {
 
-    public static boolean on = true;
-    public static boolean rpc = false;
-    public static boolean color = false;
-    public static boolean verbose = false;
-    public static boolean logDates = false;
+    public static boolean on            = System.getProperty("ibex.log.on", "true").equals("true");
+    public static boolean color         = System.getProperty("ibex.log.color", "true").equals("true");
+    public static boolean verbose       = System.getProperty("ibex.log.verbose", "false").equals("true");
+    public static boolean logDates      = System.getProperty("ibex.log.dates", "false").equals("true");
+    public static boolean notes         = System.getProperty("ibex.log.notes.on", "true").equals("true");
+    public static int maximumNoteLength = Integer.parseInt(System.getProperty("ibex.log.notes.maximumLength", (1024 * 32)+""));
+    public static boolean rpc           = false;
     public static Date lastDate = null;
 
     public static PrintStream logstream = System.err;
@@ -37,6 +39,33 @@ public class Log {
     private static Hashtable threadAnnotations = new Hashtable();
     public static void setThreadAnnotation(String s) { threadAnnotations.put(Thread.currentThread(), s); }
 
+    /** 
+     *  Notes can be used to attach log messages to the current thread
+     *  if you're not sure you want them in the log just yet.
+     *  Originally designed for retroactively logging socket-level
+     *  conversations only if an error is encountered
+     */
+    public static void note(String s) {
+        if (!notes) return;
+        StringBuffer notebuf = notebuf();
+        notebuf.append(s);
+        if (notebuf.length() > maximumNoteLength) {
+            notebuf.reverse();
+            notebuf.setLength(maximumNoteLength * 3 / 4);
+            notebuf.reverse();
+        }
+    }
+    public static void clearnotes() { if (!notes) return; notebuf().setLength(0); }
+    private static Hashtable notebufs = new Hashtable();
+    private static StringBuffer notebuf() {
+        StringBuffer ret = (StringBuffer)notebufs.get(Thread.currentThread());
+        if (ret == null) {
+            ret = new StringBuffer(16 * 1024);
+            notebufs.put(Thread.currentThread(), ret);
+        }
+        return ret;
+    }
+
     /** true iff nothing has yet been logged */
     public static boolean firstMessage = true;
 
@@ -130,6 +159,14 @@ public class Log {
             if (level < ERROR) level = WARN;
             ByteArrayOutputStream baos = new ByteArrayOutputStream();
             ((Throwable)message).printStackTrace(new PrintStream(baos));
+            if (notes && notebuf().length() > 0) {
+                PrintWriter pw = new PrintWriter(baos);
+                pw.println();
+                pw.println("Thread notes:");
+                pw.println(notebuf().toString());
+                clearnotes();
+                pw.flush();
+            }
             byte[] b = baos.toByteArray();
             BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(b)));
             String s = null;
@@ -138,7 +175,8 @@ public class Log {
                 while((s = br.readLine()) != null) m += s + "\n";
                 if (m.length() > 0) log(o, m.substring(0, m.length() - 1), level);
             } catch (IOException e) {
-                logstream.println(colorize(RED, true, "Logger: exception thrown by ByteArrayInputStream -- this should not happen"));
+                // FEATURE: use org.ibex.io.Stream's here
+                logstream.println(colorize(RED, true, "Logger: exception thrown by ByteArrayInputStream; this should not happen"));
             }
             lastClassName = "";
             return;