MediaWiki REL1_33
EventRelayerKafka.php
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1<?php
2use Kafka\Produce;
3
15 protected $config;
16
22 protected $producer;
23
29 public function __construct( array $params ) {
30 parent::__construct( $params );
31
32 $this->config = new HashConfig( $params );
33 if ( !$this->config->has( 'KafkaEventHost' ) ) {
34 throw new InvalidArgumentException( "KafkaEventHost must be configured" );
35 }
36 }
37
42 protected function getKafkaProducer() {
43 if ( !$this->producer ) {
44 $this->producer = Produce::getInstance(
45 null, null, $this->config->get( 'KafkaEventHost' ) );
46 }
47 return $this->producer;
48 }
49
50 protected function doNotify( $channel, array $events ) {
51 $jsonEvents = array_map( 'json_encode', $events );
52 try {
53 $producer = $this->getKafkaProducer();
54 $producer->setMessages( $channel, 0, $jsonEvents );
55 $producer->send();
56 } catch ( \Kafka\Exception $e ) {
57 $this->logger->warning( "Sending events failed: $e" );
58 return false;
59 }
60 return true;
61 }
62}
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
Event relayer for Apache Kafka.
doNotify( $channel, array $events)
__construct(array $params)
Create Kafka producer.
getKafkaProducer()
Get the producer object from kafka-php.
Config $config
Configuration.
Produce $producer
Kafka producer.
Base class for reliable event relays.
A Config instance which stores all settings as a member variable.
returning false will NOT prevent logging $e
Definition hooks.txt:2175
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37
Interface for configuration instances.
Definition Config.php:28
The wiki should then use memcached to cache various data To use multiple just add more items to the array To increase the weight of a make its entry a array("192.168.0.1:11211", 2))
$params