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graphql-kafkajs-subscriptions
Advanced tools
Apollo graphql subscriptions over Kafka, using kafkajs. Inspired on graphql-kafka-subscriptions.
Communication is done through 1 kafka topic specified in the KafkaPubSub
create
function. Then
channels are used to identify the right subscription.
npm install graphql-kafkajs-subscriptions
yarn add graphql-kafkajs-subscriptions
import { Kafka } from 'kafkajs';
import { KafkaPubSub } from 'graphql-kafkajs-subscriptions'
export const pubsub = KafkaPubSub.create({
topic: 'my-topic',
kafka: new Kafka({/* ... */})
groupIdPrefix: "my-group-id-prefix" // used for kafka pub/sub
})
{
collaboration: {
resolve: (payload: YourType) => {
return payload;
},
subscribe: (_, args) => {
return pubsub.asyncIterator<YourType>("my channel");
}
}
};
You can also use the subscription payload for the channel.
{
collaboration: {
resolve: (payload: YourType) => {
// what you publish will end up passing through here and to the client
return payload;
},
subscribe: (_, args) => {
// this is called from the client
return pubsub.asyncIterator<YourType>(`channel-${args.myId}`);
}
}
};
Somewhere in your code, you call this:
pubsub.publish("my channel", {
/* your event data */
});
This ends up publishing the event to kafka (to the topic you used to create the kafkaPubSub
)
and received by all consumers. The consumer which is listening to my channel
will send it
to the client.
1.0.1 (2020-04-05)
All notable changes to this project will be documented in this file. See standard-version for commit guidelines.
FAQs
Apollo graphql subscription over Kafka protocol
The npm package graphql-kafkajs-subscriptions receives a total of 1,336 weekly downloads. As such, graphql-kafkajs-subscriptions popularity was classified as popular.
We found that graphql-kafkajs-subscriptions demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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