From 661563d1f15d6bcc6b8684f9e29043d52f92da75 Mon Sep 17 00:00:00 2001
From: Fabio Manganiello <blacklight86@gmail.com>
Date: Thu, 20 Sep 2018 09:41:19 +0200
Subject: [PATCH] Added Redis bus

---
 platypush/__init__.py              |  1 +
 platypush/backend/http/__init__.py |  3 +++
 platypush/bus/__init__.py          |  6 +----
 platypush/bus/redis.py             | 41 ++++++++++++++++++++++++++++++
 4 files changed, 46 insertions(+), 5 deletions(-)
 create mode 100644 platypush/bus/redis.py

diff --git a/platypush/__init__.py b/platypush/__init__.py
index 3d88d4ee14..5bc8d3461a 100644
--- a/platypush/__init__.py
+++ b/platypush/__init__.py
@@ -13,6 +13,7 @@ import traceback
 from threading import Thread
 
 from .bus import Bus
+# from .bus.redis import RedisBus
 from .config import Config
 from .context import register_backends
 from .cron.scheduler import CronScheduler
diff --git a/platypush/backend/http/__init__.py b/platypush/backend/http/__init__.py
index 9706c06356..d026d74f61 100644
--- a/platypush/backend/http/__init__.py
+++ b/platypush/backend/http/__init__.py
@@ -237,6 +237,9 @@ class HttpBackend(Backend):
             if Config.get('token'):
                 msg.token = Config.get('token')
 
+            # TODO planning change to bus message
+            # self.bus.post(msg)
+
             if isinstance(msg, Request):
                 try:
                     response = msg.execute(_async=False)
diff --git a/platypush/bus/__init__.py b/platypush/bus/__init__.py
index 13f5c28fa2..47e1e5ded7 100644
--- a/platypush/bus/__init__.py
+++ b/platypush/bus/__init__.py
@@ -1,10 +1,6 @@
-import os
-import sys
-import signal
 import logging
 import threading
 
-from enum import Enum
 from queue import Queue
 
 from platypush.config import Config
@@ -35,7 +31,7 @@ class Bus(object):
                         origin=Config.get('device_id'),
                         thread_id=self.thread_id)
 
-        self.bus.put(evt)
+        self.post(evt)
 
     def poll(self):
         """
diff --git a/platypush/bus/redis.py b/platypush/bus/redis.py
new file mode 100644
index 0000000000..f95fbc51cd
--- /dev/null
+++ b/platypush/bus/redis.py
@@ -0,0 +1,41 @@
+import json
+import logging
+import threading
+
+from redis import Redis
+
+from platypush.bus import Bus
+from platypush.message import Message
+
+logger = logging.getLogger(__name__)
+
+
+class RedisBus(Bus):
+    """ Overrides the in-process in-memory local bus with a Redis bus """
+    _DEFAULT_REDIS_QUEUE = 'platypush/bus'
+
+    def __init__(self, on_message=None, redis_queue=_DEFAULT_REDIS_QUEUE,
+                 *args, **kwargs):
+        super().__init__(on_message=on_message)
+        self.redis = Redis(*args, **kwargs)
+        self.redis_queue = redis_queue
+        self.on_message = on_message
+        self.thread_id = threading.get_ident()
+
+    def get(self):
+        """ Reads one message from the Redis queue """
+        try:
+            msg = self.redis.blpop(self.redis_queue)
+            msg = Message.build(json.loads(msg[1].decode('utf-8')))
+        except Exception as e:
+            logger.exception(e)
+
+        return msg
+
+    def post(self, msg):
+        """ Sends a message to the Redis queue """
+        return self.redis.rpush(self.redis_queue, msg)
+
+
+# vim:sw=4:ts=4:et:
+