[doc][redis] Add transport docs.

Author: makasim

docs/filesystem_transport.md

@@ -3,7 +3,7 @@
 Use files on local filesystem as queues. 
 It creates a file per queue\topic. 
 A message is a line inside the file.
-**Limitations** It works only in auto ack mode. Local by nature therefor messages are not visible on other servers.  
+**Limitations** It works only in auto ack mode hence If consumer crashes the message is lost. Local by nature therefor messages are not visible on other servers.  
 
 * [Installation](#installation)
 * [Create context](#create-context)

docs/redis_transport.md

@@ -0,0 +1,127 @@
+# Redis transport
+
+The transport uses [Redis](https://redis.io/) as a message broker. 
+It creates a collection (a queue or topic) there. Pushes messages to the tail of the collection and pops from the head.
+The transport works with [phpredis](https://github.com/phpredis/phpredis) php extension or [predis](https://github.com/nrk/predis) library. 
+Make sure you installed either of them 
+ 
+**Limitations** It works only in auto ack mode hence If consumer crashes the message is lost.  
+
+* [Installation](#installation)
+* [Create context](#create-context)
+* [Declare topic](#declare-topic)
+* [Declare queue](#decalre-queue)
+* [Bind queue to topic](#bind-queue-to-topic)
+* [Send message to topic](#send-message-to-topic)
+* [Send message to queue](#send-message-to-queue)
+* [Consume message](#consume-message)
+* [Purge queue messages](#purge-queue-messages)
+
+## Installation
+
+* With php redis extension:
+
+```bash
+$ apt-get install php-redis
+$ composer require enqueue/redis
+```
+
+* With predis library:
+
+```bash
+$ composer require enqueue/redis predis/predis:^1
+```
+
+## Create context
+
+* With php redis extension:
+
+```php
+<?php
+use Enqueue\Redis\RedisConnectionFactory;
+
+$connectionFactory = new RedisConnectionFactory([
+    'host' => 'localhost',
+    'port' => 6379,
+    'vendor' => 'phpredis',
+]);
+
+$psrContext = $connectionFactory->createContext();
+```
+
+* With predis library:
+
+```php
+<?php
+use Enqueue\Redis\RedisConnectionFactory;
+
+$connectionFactory = new RedisConnectionFactory([
+    'host' => 'localhost',
+    'port' => 6379,
+    'vendor' => 'predis',
+]);
+
+$psrContext = $connectionFactory->createContext();
+```
+
+## Send message to topic
+
+```php
+<?php
+/** @var \Enqueue\Redis\RedisContext $psrContext */
+
+$fooTopic = $psrContext->createTopic('aTopic');
+$message = $psrContext->createMessage('Hello world!');
+
+$psrContext->createProducer()->send($fooTopic, $message);
+```
+
+## Send message to queue 
+
+```php
+<?php
+/** @var \Enqueue\Redis\RedisContext $psrContext */
+
+$fooQueue = $psrContext->createQueue('aQueue');
+$message = $psrContext->createMessage('Hello world!');
+
+$psrContext->createProducer()->send($fooQueue, $message);
+```
+
+## Consume message:
+
+```php
+<?php
+/** @var \Enqueue\Redis\RedisContext $psrContext */
+
+$fooQueue = $psrContext->createQueue('aQueue');
+$consumer = $psrContext->createConsumer($fooQueue);
+
+$message = $consumer->receive();
+
+// process a message
+```
+
+## Delete queue (purge messages):
+
+```php
+<?php
+/** @var \Enqueue\Redis\RedisContext $psrContext */
+
+$fooQueue = $psrContext->createQueue('aQueue');
+
+$psrContext->deleteQueue($fooQueue);
+```
+
+## Delete topic (purge messages):
+
+```php
+<?php
+/** @var \Enqueue\Redis\RedisContext $psrContext */
+
+$fooTopic = $psrContext->createTopic('aTopic');
+
+$psrContext->deleteTopic($fooTopic);
+```
+
+[back to index](index.md)