Added code for debugging Node.js talk.

Akka/.gitignore

@@ -0,0 +1,6 @@
+.classpath
+.gradle
+.project
+.settings
+bin
+build

Akka/build.gradle

@@ -9,7 +9,7 @@ repositories {
 }
 
 dependencies {
-    runtime group: 'se.scalablesolutions.akka', name: 'akka-actor', version: '1.0'
-    runtime group: 'se.scalablesolutions.akka', name: 'akka-typed-actor', version: '1.0'
-    runtime group: 'se.scalablesolutions.akka', name: 'akka-remote', version: '1.0'
+    compile group: 'se.scalablesolutions.akka', name: 'akka-actor', version: '1.0'
+    compile group: 'se.scalablesolutions.akka', name: 'akka-typed-actor', version: '1.0'
+    compile group: 'se.scalablesolutions.akka', name: 'akka-remote', version: '1.0'
 }

Akka/src/main/java/com/neophi/sample/akka/FutureUntypedActor.java

@@ -59,7 +59,7 @@ private static void sendToTheFuture(final ActorRef actorRef, final String messag
         }
         catch (Exception exception)
         {
-            System.out.println(exception.getMessage());
+            System.out.println("Future await exception" + exception.getMessage());
         }
         if (future.isCompleted())
         {

Akka/src/main/java/com/neophi/sample/akka/MyFirstTypedActor.java

@@ -31,7 +31,7 @@
 @SuppressWarnings("unchecked")
 public class MyFirstTypedActor extends TypedActor implements MyTypedInterface
 {
-    public void echo(String message)
+    public void echo(final String message)
     {
         log().logger().debug(message);
     }
@@ -46,7 +46,7 @@ public List<String> reverse(final List<String> data)
         return result;
     }
 
-    public Future<MyTypedMessage> send(MyTypedMessage myMessage)
+    public Future<MyTypedMessage> send(final MyTypedMessage myMessage)
     {
         return future(new MyTypedMessage(myMessage.getFrom(), myMessage.getTo()));
     }

debugging/.gitignore

@@ -0,0 +1,2 @@
+*.log
+node_modules/

debugging/.jshintrc

@@ -0,0 +1,5 @@
+{
+  "globals": {
+    "console": false
+  }
+}

debugging/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "debugging",
+  "version": "0.0.1",
+  "description": "Sample code for Node.js debugging talk",
+  "main": "index.js",
+  "dependencies": {
+    "debug": "0.7.1",
+    "memwatch": "0.2.2",
+    "tick": "0.0.3",
+    "xml2js": "~0.2.6"
+  },
+  "author": "Daniel Rinehart",
+  "license": "MIT"
+}

debugging/sample.xml

@@ -0,0 +1,121 @@
+<?xml version="1.0"?>
+<!-- http://msdn.microsoft.com/en-us/library/windows/desktop/ms762271(v=vs.85).aspx -->
+<catalog>
+   <book id="bk101">
+      <author>Gambardella, Matthew</author>
+      <title>XML Developer's Guide</title>
+      <genre>Computer</genre>
+      <price>44.95</price>
+      <publish_date>2000-10-01</publish_date>
+      <description>An in-depth look at creating applications 
+      with XML.</description>
+   </book>
+   <book id="bk102">
+      <author>Ralls, Kim</author>
+      <title>Midnight Rain</title>
+      <genre>Fantasy</genre>
+      <price>5.95</price>
+      <publish_date>2000-12-16</publish_date>
+      <description>A former architect battles corporate zombies, 
+      an evil sorceress, and her own childhood to become queen 
+      of the world.</description>
+   </book>
+   <book id="bk103">
+      <author>Corets, Eva</author>
+      <title>Maeve Ascendant</title>
+      <genre>Fantasy</genre>
+      <price>5.95</price>
+      <publish_date>2000-11-17</publish_date>
+      <description>After the collapse of a nanotechnology 
+      society in England, the young survivors lay the 
+      foundation for a new society.</description>
+   </book>
+   <book id="bk104">
+      <author>Corets, Eva</author>
+      <title>Oberon's Legacy</title>
+      <genre>Fantasy</genre>
+      <price>5.95</price>
+      <publish_date>2001-03-10</publish_date>
+      <description>In post-apocalypse England, the mysterious 
+      agent known only as Oberon helps to create a new life 
+      for the inhabitants of London. Sequel to Maeve 
+      Ascendant.</description>
+   </book>
+   <book id="bk105">
+      <author>Corets, Eva</author>
+      <title>The Sundered Grail</title>
+      <genre>Fantasy</genre>
+      <price>5.95</price>
+      <publish_date>2001-09-10</publish_date>
+      <description>The two daughters of Maeve, half-sisters, 
+      battle one another for control of England. Sequel to 
+      Oberon's Legacy.</description>
+   </book>
+   <book id="bk106">
+      <author>Randall, Cynthia</author>
+      <title>Lover Birds</title>
+      <genre>Romance</genre>
+      <price>4.95</price>
+      <publish_date>2000-09-02</publish_date>
+      <description>When Carla meets Paul at an ornithology 
+      conference, tempers fly as feathers get ruffled.</description>
+   </book>
+   <book id="bk107">
+      <author>Thurman, Paula</author>
+      <title>Splish Splash</title>
+      <genre>Romance</genre>
+      <price>4.95</price>
+      <publish_date>2000-11-02</publish_date>
+      <description>A deep sea diver finds true love twenty 
+      thousand leagues beneath the sea.</description>
+   </book>
+   <book id="bk108">
+      <author>Knorr, Stefan</author>
+      <title>Creepy Crawlies</title>
+      <genre>Horror</genre>
+      <price>4.95</price>
+      <publish_date>2000-12-06</publish_date>
+      <description>An anthology of horror stories about roaches,
+      centipedes, scorpions  and other insects.</description>
+   </book>
+   <book id="bk109">
+      <author>Kress, Peter</author>
+      <title>Paradox Lost</title>
+      <genre>Science Fiction</genre>
+      <price>6.95</price>
+      <publish_date>2000-11-02</publish_date>
+      <description>After an inadvertant trip through a Heisenberg
+      Uncertainty Device, James Salway discovers the problems 
+      of being quantum.</description>
+   </book>
+   <book id="bk110">
+      <author>O'Brien, Tim</author>
+      <title>Microsoft .NET: The Programming Bible</title>
+      <genre>Computer</genre>
+      <price>36.95</price>
+      <publish_date>2000-12-09</publish_date>
+      <description>Microsoft's .NET initiative is explored in 
+      detail in this deep programmer's reference.</description>
+   </book>
+   <book id="bk111">
+      <author>O'Brien, Tim</author>
+      <title>MSXML3: A Comprehensive Guide</title>
+      <genre>Computer</genre>
+      <price>36.95</price>
+      <publish_date>2000-12-01</publish_date>
+      <description>The Microsoft MSXML3 parser is covered in 
+      detail, with attention to XML DOM interfaces, XSLT processing, 
+      SAX and more.</description>
+   </book>
+   <book id="bk112">
+      <author>Galos, Mike</author>
+      <title>Visual Studio 7: A Comprehensive Guide</title>
+      <genre>Computer</genre>
+      <price>49.95</price>
+      <publish_date>2001-04-16</publish_date>
+      <description>Microsoft Visual Studio 7 is explored in depth,
+      looking at how Visual Basic, Visual C++, C#, and ASP+ are 
+      integrated into a comprehensive development 
+      environment.</description>
+   </book>
+</catalog>

debugging/src/console.js

@@ -0,0 +1,31 @@
+/**
+  node src/console.log
+**/
+var obj = {
+  a: 12,
+  b: {
+    c: 'd'
+  }
+};
+
+console.info('-------------------- console.log --------------------');
+console.log('logged message');
+console.log('util.inspect', 0.1, obj);
+console.log('format syntax %d, %s, and %j', 0.1, obj, obj);
+
+console.warn('-------------------- console.error --------------------');
+console.error('logged message');
+console.error('util.inspect', 0.1, obj, obj);
+console.error('format syntax %d, %s, and %j', 0.1, obj, obj);
+
+console.info('-------------------- console.dir --------------------');
+console.dir(obj);
+
+console.warn('-------------------- console.trace --------------------');
+console.trace('db-op');
+
+console.warn('-------------------- console.assert --------------------');
+console.assert(1 === 1, 'one is one');
+console.assert(1 === 2, 'one is two');
+
+console.log('never logged');

debugging/src/debug.js

@@ -0,0 +1,27 @@
+/**
+  node src/debug.js
+  DEBUG=* node src/debug.js
+  DEBUG="worker:*" node src/debug.js
+  DEBUG=* node src/debug.js 2>&1 | tee /dev/null
+**/
+
+var a = require('debug')('worker:a');
+var b = require('debug')('worker:b');
+var c = require('debug')('controller');
+
+function workA() {
+  a('doing lots of uninteresting work');
+  setTimeout(workA, Math.random() * 1000);
+}
+
+workA();
+c('worker a started');
+
+function workB() {
+  var wait = Math.random() * 2000;
+  b('doing some work for %d', wait);
+  setTimeout(workB, wait);
+}
+
+workB();
+c('worker b started');

debugging/src/heap.js

@@ -0,0 +1,14 @@
+/**
+  node src/heap.js | less
+**/
+var memwatch = require('memwatch');
+
+function LeakingClass() {
+}
+
+var leaks = [];
+var heapDiff = new memwatch.HeapDiff();
+for (var i = 0; i < 100; i++) {
+  leaks.push(new LeakingClass());
+}
+console.log(JSON.stringify(heapDiff.end(), null, '  '));

debugging/src/leak.js

@@ -0,0 +1,30 @@
+/**
+  node src/leak.js
+**/
+var memwatch = require('memwatch');
+memwatch.on('leak', function(info) {
+  console.log('LEAK');
+  console.dir(info);
+  process.exit(0);
+});
+memwatch.on('stats', function(stats) {
+  console.log('STATS');
+  console.dir(stats);
+});  
+
+var parsers = [];
+var data = [];
+var xml2js = require('xml2js');
+var fs = require('fs');
+function loadData() {
+  fs.readFile('sample.xml', function(err, xml) {
+    var parser = new xml2js.Parser();
+    parsers.push(parser);
+    parser.parseString(xml, function(err, json) {
+      data.push(json);
+    });
+    process.nextTick(loadData);
+  });
+}
+
+loadData();

debugging/src/server.js

@@ -0,0 +1,15 @@
+/**
+  node --debug-brk src/server.js
+  // uncommnet debugger;
+  node --debug src/server.js
+**/
+var http = require('http');
+var count = 0;
+
+http.createServer(function (req, res) {
+  // debugger;
+  count += 1;
+  res.writeHead(200, {'Content-Type': 'text/plain'});
+  res.end('Hello Request ' + count + '\n');
+}).listen(1337, '127.0.0.1');
+console.log('Server running at http://127.0.0.1:1337/');

debugging/src/time.js

@@ -0,0 +1,14 @@
+/**
+  node --prof src/time.js
+  ./node_modules/.bin/node-tick-processor | less
+**/
+function addAwhile(stopTime) {
+  var sum = 0;
+  while (Date.now() < stopTime) {
+    sum += 1;
+  }
+}
+
+console.time('add-op');
+addAwhile(Date.now() + 5 * 1000);
+console.timeEnd('add-op');