Chapters

48 Chapters | 5:05:05 |

01

Installing Messenger

6:15
02

Message, Handler & the Bus

8:36
03

Doing Work in the Handler

6:32
04

Message, Handler & debug:messenger

5:51
05

Transport: Do Work Later (Async)

7:33
06

Worker Command

5:34
07

Problems with Entities in Messages

4:53
08

Passing Entity Ids inside of Messages

8:00
09

Dispatching a Message inside a Handler?

5:30
10

Partial Handler Failures & Advanced Routing

4:35
11

Envelopes & Stamps

6:23
12

Retrying on Failure

5:11
13

Retry Delay & Retry Strategy

4:40
14

The Failure Transport

5:37
15

Investigating & Retrying Failed Messages

5:41
16

Middleware

5:59
17

Tracking Messages with Middleware & a Stamp

5:31
18

Logger Channel Setup and Autowiring

5:26
19

Middleware Message Lifecycle Logging

7:47
20

High Priority Transports

5:40
21

Handling Messages Sync while Developing

5:54
22

Functional Test for the Upload Endpoint

9:22
23

Testing with the "in-memory" Transport

5:26
24

Deployment & Supervisor

9:08
25

Killing Workers Early & on Deploy

5:55
26

Events & Event Bus

5:22
27

Creating & Handling Events

7:55
28

Dispatching the Event & No Handlers

7:06
29

Messenger vs EventDispatcher

3:18
30

Doctrine Transaction & Validation Middleware

5:58
31

Event & Command Bus Organization

7:23
32

Query Bus

8:47
33

Advanced Handler Config: Handler Subscribers

7:58
34

Sending Handlers to Different Transports: from_transport

3:21
35

AMQP with RabbitMQ

7:22
36

AMQP Internals: Exchanges & Queues

8:10
37

AMQP Priority Exchange

7:15
38

Delaying in AMQP: Dead Letter Exchange

7:23
39

Exchange Routing and Binding Keys

6:38
40

Dynamic AMQP Routing Key (AmqpStamp)

7:50
41

Serializing Messages as JSON

6:41
42

JSON, Message Headers & Serializer Options

3:15
43

Setup for Messages from an Outside System

6:01
44

Transport for Consuming External Messages

5:51
45

Custom Transport Serializer

6:33
46

The Lifecycle of a Message & its Stamps

8:16
47

Graceful Failure in the Transport Serializer

4:47
48

Mapping Messages to Classes in a Transport Serializer

4:56

> Symfony 5 > Messenger! Queue work for Later

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08.

Passing Entity Ids inside of Messages

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5 Comments

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Cristóbal Rejdych 6 years ago

Hi guys,
I wanna ask about LoggerAwareTrait. You wrote in this tutorial:

Oh, and the only reason I'm checking to see if $this->logger is set is... basically... to help with unit testing. Inside Symfony, the logger property will always be set. But on an object-oriented level, there's nothing that guarantees that someone will have called setLogger()... so this is just a bit more responsible.

But yesterday I did manual tests for some of my project functionality and I discovered that logger setted inside MessageHandler by using LoggerAwareTrait and implementing LoggerAwareInterface is always null. So I thought it's probably something wrong with logger. So I created new one by Dependency injection in constructor and that one works correctly. What could I do wrong with LoggerAwareTrait?? I use Symfony 4.3.11.

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MolloKhan SFCASTS Cristóbal Rejdych 6 years ago edited

Hey Cristóbal Rejdych

That's odd. I tested it on Symfony 4.4 and it worked fine. Can you double-check if you imported the right classes


use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;

if that's not the case, can you upgrade to Symfony 4.4? it's possible that there is a bug on the version you are

Cheers!

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Cristóbal Rejdych MolloKhan 6 years ago

Hi Diego,
yeah I'm imported that classes, implement LoggerAwareInterface and use LoggerAwareTrait inside class. So if nothing else could break it down, it must be bug. For now I change it to simple DI inside constructor, but when I complete all required by project tasks I try to upgrade it to Symfony 4.4 and wrote here result.

Thanks a lot for reply.
Cheers ;)!

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MolloKhan SFCASTS Cristóbal Rejdych 6 years ago

Interesting... One last thing I can think of is that you have to restart the Messenger Worker every time you change your App's code but I suppose you did that so I'm leaning towards a bug on Messenger

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Cristóbal Rejdych MolloKhan 6 years ago

Yeah I'm restarting worker after any changes I do inside messenger. Like I wrote before I was curious of this problem and I'm upgraded Symfony to latest version 4.4 and test it again and problem with this trait still exist, so it's not bug in Symfony, but fortunately DI logger service still work properly so I don't see reason to make it big problem which must be resolved. If I in the future find cause of problem I will post info about it here ;)

1 |

This tutorial is built with Symfony 4.3, but will work well on Symfony 4.4 or 5.

Symfony 4.3

What PHP libraries does this tutorial use?

// composer.json
{
    "require": {
        "php": "^7.1.3",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "composer/package-versions-deprecated": "^1.11", // 1.11.99
        "doctrine/annotations": "^1.0", // v1.8.0
        "doctrine/doctrine-bundle": "^1.6.10", // 1.11.2
        "doctrine/doctrine-migrations-bundle": "^1.3|^2.0", // v2.0.0
        "doctrine/orm": "^2.5.11", // v2.6.3
        "intervention/image": "^2.4", // 2.4.2
        "league/flysystem-bundle": "^1.0", // 1.1.0
        "phpdocumentor/reflection-docblock": "^3.0|^4.0", // 4.3.1
        "sensio/framework-extra-bundle": "^5.3", // v5.3.1
        "symfony/console": "4.3.*", // v4.3.2
        "symfony/dotenv": "4.3.*", // v4.3.2
        "symfony/flex": "^1.9", // v1.21.6
        "symfony/framework-bundle": "4.3.*", // v4.3.2
        "symfony/messenger": "4.3.*", // v4.3.4
        "symfony/property-access": "4.3.*", // v4.3.2
        "symfony/property-info": "4.3.*", // v4.3.2
        "symfony/serializer": "4.3.*", // v4.3.2
        "symfony/validator": "4.3.*", // v4.3.2
        "symfony/webpack-encore-bundle": "^1.5", // v1.6.2
        "symfony/yaml": "4.3.*" // v4.3.2
    },
    "require-dev": {
        "easycorp/easy-log-handler": "^1.0.7", // v1.0.7
        "symfony/debug-bundle": "4.3.*", // v4.3.2
        "symfony/maker-bundle": "^1.0", // v1.12.0
        "symfony/monolog-bundle": "^3.0", // v3.4.0
        "symfony/stopwatch": "4.3.*", // v4.3.2
        "symfony/twig-bundle": "4.3.*", // v4.3.2
        "symfony/var-dumper": "4.3.*", // v4.3.2
        "symfony/web-profiler-bundle": "4.3.*" // v4.3.2
    }
}

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