Kafkaesque | node Kafka client | Pub Sub library

by apparatus JavaScript Version: 1.0.1 License: MIT

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | Kafkaesque Summary

Kafkaesque is a JavaScript library typically used in Messaging, Pub Sub, Nodejs, Kafka applications. Kafkaesque has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i kafkaesque' or download it from GitHub, npm.

node Kafka client

Support

Quality

Security

License

Reuse

Support

Kafkaesque has a low active ecosystem.

It has 46 star(s) with 15 fork(s). There are 6 watchers for this library.

It had no major release in the last 12 months.

There are 8 open issues and 8 have been closed. On average issues are closed in 78 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Kafkaesque is 1.0.1

Quality

Kafkaesque has 0 bugs and 0 code smells.

Security

Kafkaesque has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

Kafkaesque code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

Kafkaesque is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

Kafkaesque releases are available to install and integrate.

Deployable package is available in npm.

Installation instructions, examples and code snippets are available.

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Kafkaesque Key Features

No Key Features are available at this moment for Kafkaesque.

Kafkaesque Examples and Code Snippets

No Code Snippets are available at this moment for Kafkaesque.

Community Discussions

Trending Discussions on Kafkaesque

Creating an annotation for JUnit 4/5 to initialize and inject an object in tests

Unable to deploy Apache Pulsar on AKS. 'selectedNode annotation value "" not set'

How to do broadcast in Pulsar

QUESTION

Creating an annotation for JUnit 4/5 to initialize and inject an object in tests

Asked 2020-Sep-21 at 12:21

I am developing a testing library for Kafka, Kafkaesque. The library lets you develop integration tests for Kafka using a fluid and elegant (?!) API. For now, I develop the version for Spring Kafka.

The library needs to be initialized in every test:

...

ANSWER

Answered 2020-Sep-21 at 12:21

JUnit 4

One possible solution is to create a custom annotation processing using reflection. You can get the test method name with @Rule, so for example:

Source https://stackoverflow.com/questions/63968934

QUESTION

Unable to deploy Apache Pulsar on AKS. 'selectedNode annotation value "" not set'

Asked 2020-Jun-26 at 02:02

This is my first attempt to deploy Pulsar on AKS v1.15.11.

I'm getting a not very verbose error messages from 2 pods that are "unscheduled" :

Firtst pod unscheduled "pulsar-zookeeper-0"

[Pod] [pulsar-zookeeper-0] FailedScheduling: selectedNode annotation value "" not set to scheduled node "aks-agentpool-20916223-vmss000001"

Second Pod unscheduled "pulsar-bookkeeper-0"

[Pod] [pulsar-bookkeeper-0] FailedScheduling: selectedNode annotation value "" not set to scheduled node "aks-pulsar-20916223-vmss000001"

Here's a detailed procedure of what I did. I've used official helm-charts for deployments

...

ANSWER

Answered 2020-Jun-26 at 02:02

AKS already comes with Storage Classes

you shouldn't need to tell your Chart to create a Storage Class using

Source https://stackoverflow.com/questions/62539951

QUESTION

How to do broadcast in Pulsar

Asked 2020-Mar-17 at 11:37

I'm investigating a tech for our cluster. Pulsar looks good, but the usage looks more like a queueing system. Of course, queueing system is good to have, but I have a specific requirement: broadcasting.

We would like to use one machine to generate the data and publish it to a Pulsar topic. Then we use a group of servers, forming a replica. Each server consumes the message flow on that topic, and serves clients via WebSocket.

This is different than the Shared subscription, because each server needs to receive all messages, not a fraction of it.

I came to this post: https://kafkaesque.io/subscriptions-multiple-groups-of-consumers-on-pulsar-topic/ , which explains how to do such a job: each server needs create a new exclusive subscription, say use a UUID as its subscription name, from the unique exclusive subscription you can get the full message flow of that topic.

But since our server replica can be dynamic, so once some of the server restart, they will create new UUID subscription again, which will leave many orphan subscriptions on the topic, which eventually would become maintenance headache.

Anyone has the experience to setup a broadcast use case using Pulsar?

...

ANSWER

Answered 2020-Mar-09 at 19:06

Using an exclusive subscription for each consumer is the only way to ensure that each of your consumers receives ALL of the messages on the topic, and Pulsar handles multiple subscriptions quite well.

The issue it seems is the server restart use case, and I don't think that simply connecting with a new UUID subscription is the right approach (putting aside the orphaned subscriptions). You really want to have the server reuse the previous subscription after it restarts. This is because each subscription keeps track of the last message in the topic that it had processed and acknowledged, so you can pick up exactly where you had left off before the server crashed if you reconnect with the same subscription UUID. If you connect with a new UUID, then you will start processing messages produced from that point in time forward, and all messages produced during the restart period will be "lost"

Therefore, you will need to find a mechanism to share these UUIDs across server failures and return them to the restarting server. One approach would be to have a mechanism similar to zookeeper leader election, in which each server is granted an exclusive lease that expires periodically. The server must then periodically refresh the lease to retain it. Then if the server were to crash, it would fail to refresh the lease on that UUID and the restarting server would then be granted the lease when it attempts to reconnect.

See https://curator.apache.org/curator-recipes/leader-election.html for a better explanation of the pattern.

Source https://stackoverflow.com/questions/60606241

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install Kafkaesque

Simple Consumer Example: In the following we create a 'Simple Consumer' (in kafka terminology). This is a consumer which consumes from specified partitions, not auto assigned partitions. Auto Balanced Group Member Example: In the following we create an Auto Balanced Group Member. This is a consumer which subscribes to topics, joins a group and then gets auto-assigned partitions from its topic subscriptions. This allows for easy horizontal scaling of kafkaesque consumers.

Support

This module encourages open participation. If you feel you can help in any way, or discover any Issues, feel free to create an issue or create a pull request!. If you wish to read more on our guidelines, feel free to checkout the concise contribution file.

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