Messenger! Queue work for Later

5h 5m 31s
English
Paid

Course description

Symfony's Messenger component gives you a beautiful system for designing your code around "message" objects and decoupled "handlers" that do the work! ... wait... that's not right, it's really... Symfony's Messenger component gives you the power to execute code asynchronously via queues and workers!

Read more about the course

Actually, it's both! Messenger is one of the newest parts of Symfony and we absolutely ❤️ it. In this tutorial, we'll create an important application that asynchronously adds our favorite cat (Ponka) to all of your favorite photos. Along the way, we'll learn to:

  • Create a messages classes
  • Add & configure "handler" classes that do the work
  • Dispatch messages through the bus
  • Configure "transports" for async messages
  • Route messages to transports
  • Execute "worker" processes that "consume" queued messages
  • Things fail!? Retry message and set up the "failure transport"
  • Middleware
  • Add & understand message stamps
  • Prioritized transports
  • A little CQRS: a Query bus
  • Testing & Dev: handling messages "sync"
  • Deployment and supervisor
  • RabbitMQ & AMQP

Let's get to work!

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#1: Installing Messenger

All Course Lessons (48)

#Lesson TitleDurationAccess
1
Installing Messenger Demo
06:15
2
Message, Handler & the Bus
08:36
3
Doing Work in the Handler
06:33
4
Message, Handler & debug:messenger
05:52
5
Transport: Do Work Later (Async)
07:33
6
Worker Command
05:34
7
Problems with Entities in Messages
04:54
8
Passing Entity Ids inside of Messages
08:01
9
Dispatching a Message inside a Handler?
05:30
10
Partial Handler Failures & Advanced Routing
04:36
11
Envelopes & Stamps
06:24
12
Retrying on Failure
05:11
13
Retry Delay & Retry Strategy
04:41
14
The Failure Transport
05:37
15
Investigating & Retrying Failed Messages
05:42
16
Middleware
05:59
17
Tracking Messages with Middleware & a Stamp
05:31
18
Logger Channel Setup and Autowiring
05:27
19
Middleware Message Lifecycle Logging
07:48
20
High Priority Transports
05:41
21
Handling Messages Sync while Developing
05:54
22
Functional Test for the Upload Endpoint
09:23
23
Testing with the "in-memory" Transport
05:26
24
Deployment & Supervisor
09:08
25
Killing Workers Early & on Deploy
05:55
26
Events & Event Bus
05:23
27
Creating & Handling Events
07:55
28
Dispatching the Event & No Handlers
07:07
29
Messenger vs EventDispatcher
03:19
30
Doctrine Transaction & Validation Middleware
05:59
31
Event & Command Bus Organization
07:23
32
Query Bus
08:48
33
Advanced Handler Config: Handler Subscribers
07:59
34
Sending Handlers to Different Transports: from_transport
03:22
35
AMQP with RabbitMQ
07:22
36
AMQP Internals: Exchanges & Queues
08:11
37
AMQP Priority Exchange
07:16
38
Delaying in AMQP: Dead Letter Exchange
07:23
39
Exchange Routing and Binding Keys
06:39
40
Dynamic AMQP Routing Key (AmqpStamp)
07:51
41
Serializing Messages as JSON
06:41
42
JSON, Message Headers & Serializer Options
03:15
43
Setup for Messages from an Outside System
06:01
44
Transport for Consuming External Messages
05:51
45
Custom Transport Serializer
06:34
46
The Lifecycle of a Message & its Stamps
08:17
47
Graceful Failure in the Transport Serializer
04:48
48
Mapping Messages to Classes in a Transport Serializer
04:56

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