From 2ac684f53df3f76aacb4d1be79d7db64567f1964 Mon Sep 17 00:00:00 2001
From: Federico Marani <federico.marani@ymail.com>
Date: Fri, 20 Feb 2009 18:57:20 +0000
Subject: * implemented STOMP support for external message queueing systems *
 (ticket-724) * included PHP STOMP libraries
 (http://code.google.com/p/stompcli/)

---
 lib/queuehandler.php | 74 +++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 65 insertions(+), 9 deletions(-)

(limited to 'lib/queuehandler.php')

diff --git a/lib/queuehandler.php b/lib/queuehandler.php
index 9ce9e32b3..752bbc6d2 100644
--- a/lib/queuehandler.php
+++ b/lib/queuehandler.php
@@ -75,15 +75,9 @@ class QueueHandler extends Daemon
         return true;
     }
     
-    function run()
-    {
-        if (!$this->start()) {
-            return false;
-        }
-        $this->log(LOG_INFO, 'checking for queued notices');
-        $transport = $this->transport();
+    function db_dispatch() {
         do {
-            $qi = Queue_item::top($transport);
+            $qi = Queue_item::top($this->transport());
             if ($qi) {
                 $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($qi->created));
                 $notice = Notice::staticGet($qi->notice_id);
@@ -115,6 +109,68 @@ class QueueHandler extends Daemon
                 $this->idle(5);
             }    
         } while (true);
+    }
+
+    function stomp_dispatch() {
+	require("Stomp.php");
+	$con = new Stomp(common_config('queue','stomp_server'));
+	if (!$con->connect()) {
+		$this->log(LOG_ERR, 'Failed to connect to queue server');
+		return false;
+	}
+	$queue_basename = common_config('queue','queue_basename');
+	// subscribe to the relevant queue (format: basename-transport)
+	$con->subscribe('/queue/'.$queue_basename.'-'.$this->transport());
+
+        do {
+            $frame = $con->readFrame();
+            if ($frame) {
+                $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($frame->headers['created']));
+
+		// XXX: Now the queue handler receives only the ID of the
+		// notice, and it has to get it from the DB
+		// A massive improvement would be avoid DB query by transmitting
+		// all the notice details via queue server...
+                $notice = Notice::staticGet($frame->body);
+
+                if ($notice) {
+                    $this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
+                    $result = $this->handle_notice($notice);
+                    if ($result) {
+			// if the msg has been handled positively, ack it
+			// and the queue server will remove it from the queue
+			$con->ack($frame);
+                    	$this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
+		    }
+		    else {
+			// no ack
+                        $this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
+                    }
+                    $notice->free();
+                    unset($notice);
+                    $notice = null;
+                } else {
+                    $this->log(LOG_WARNING, 'queue item for notice that does not exist');
+                }
+	    }
+        } while (true);
+	
+	$con->disconnect();
+    }
+	
+
+    function run()
+    {
+        if (!$this->start()) {
+            return false;
+        }
+        $this->log(LOG_INFO, 'checking for queued notices');
+	if (common_config('queue','subsystem') == 'stomp') {
+		$this->stomp_dispatch();
+	}
+	else {
+		$this->db_dispatch();
+	}
         if (!$this->finish()) {
             return false;
         }
@@ -143,4 +199,4 @@ class QueueHandler extends Daemon
         common_log($level, $this->class_name() . ' ('. $this->get_id() .'): '.$msg);
     }
 }
-    
\ No newline at end of file
+    
-- 
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