[doc] add elastica populate bundle

Author: makasim

Diff for: docs/elastica-bundle/populate-command-optimization.md

@@ -0,0 +1,114 @@
+# Enqueue Elastica Bundle
+
+Improves performance of `fos:elastica:populate` commands by distributing the work among consumers. 
+The performance gain depends on how much consumers you run. 
+For example 10 consumers may give you 5 to 7 times better performance.  
+
+## Installation
+
+Install packages using [composer](https://getcomposer.org/)
+
+```bash
+$ composer require enqueue/elastica-bundle friendsofsymfony/elastica-bundle
+```
+
+Add bundles to `AppKernel`
+
+```php
+<?php
+use Symfony\Component\HttpKernel\Kernel;
+
+class AppKernel extends Kernel
+{
+    public function registerBundles()
+    {
+        $bundles = [
+            // ...
+            
+            new Enqueue\Bundle\EnqueueBundle(),
+            new Enqueue\ElasticaBundle\EnqueueElasticaBundle(),
+            new FOS\ElasticaBundle\FOSElasticaBundle(),
+        ];
+        
+        return $bundles;
+    }
+}
+```
+
+Here's an example of what your `FOSElasticaBundle` configuration may look like:
+
+```yaml
+fos_elastica:
+    clients:
+        default: { host: %elasticsearch_host%, port: %elasticsearch_port% }
+    indexes:
+        app:
+            index_name: app_%kernel.environment%
+            types:
+                blog:
+                    mappings:
+                        text: ~
+                    persistence:
+                        driver: orm
+                        model: AppBundle\Entity\Blog
+                        provider: ~
+                        listener: ~
+                        finder: ~
+```
+
+Here's an example of what your EnqueueBundle configuration may look like:
+
+```yaml
+enqueue:
+    transport:
+        default: 'file://%kernel.root_dir%/../var/messages'
+```
+
+Sure you can configure other transports like: [rabbitmq, amqp, stomp and so on](https://github.com/php-enqueue/enqueue-dev/blob/master/docs/bundle/config_reference.md)
+Create a `fos_elastica_populate` queue on broker side, if needed.
+
+## Usage 
+
+The bundle once registered automatically replaces Doctrine ORM provider by async one. 
+So you have to run as usual 
+ 
+```bash
+$ ./bin/console fos:elastica:populate 
+```
+
+If you want to disable this behavior you can un register the bundle or use env var
+
+```bash
+$ ENQUEUE_ELASTICA_DISABLE_ASYNC=1 ./bin/console fos:elastica:populate 
+```
+
+Run some consumers either using client (you might have to enable it) consume command:
+
+```bash
+$ ./bin/console enqueue:consume --setup-broker -vvv 
+```
+
+or a transport one: 
+ 
+```bash
+$ ./bin/console enqueue:transport:consume enqueue_elastica.populate_processor -vvv 
+```
+
+We suggest to use [supervisor](http://supervisord.org/) on production to control numbers of consumers and restart them.   
+
+Here's config example
+
+```
+# cat /etc/supervisor/conf.d/fos_elastica_populate.conf 
+[program:fos_elastica_populate]
+command=/mqs/symfony/bin/console enqueue:transport:consume fos_elastica_populate enqueue_elastica.populate_processor
+process_name=%(program_name)s_%(process_num)02d
+numprocs=10
+autostart=true
+autorestart=true
+startsecs=0
+user=root
+redirect_stderr=true
+```
+
+[back to index](../index.md)

Diff for: docs/index.md

@@ -35,15 +35,16 @@
     - [Consumption extension](bundle/consumption_extension.md)
     - [Production settings](bundle/production_settings.md)
     - [Debuging](bundle/debuging.md)
-    - [Functional testing](bundle/functional_testing.md)
-* Async event dispatcher  (Symfony)
-    - [Quick tour](async_event_dispatcher/quick_tour.md)
+    - [Functional testing](bundle/functional_testing.md) 
 * Laravel
     - [Quick tour](laravel/quick_tour.md)
     - [Queues](laravel/queues.md)
 * Magento
     - [Quick tour](magento/quick_tour.md)
-    - [Cli commands](magento/cli_commands.md) 
+    - [Cli commands](magento/cli_commands.md)
+* [Use cases]
+    - [FOSElasticaBundle. Populate command optimizations](elastica-bundle/populate-command-optimization.md)
+    - [Symfony. Async event dispatcher](async_event_dispatcher/quick_tour.md)
 * Development
     - [Contribution](contribution.md)