MessageBus | extremely fast , and zero-gc message | Pub Sub library
kandi X-RAY | MessageBus Summary
kandi X-RAY | MessageBus Summary
the messagebus is an extremely light-weight message/event bus implementation that follows the publish/subscribe pattern and is based on the [mbassador] project. it is designed for ease of use and simplicity, and aims for maximum performance and zero garbage during message publication. at the core of this project is the use of the single writer principle as described by nitsan wakart on his [blog] and the fantastic [lmax disruptor] using the messagebus in your project is very easy. 1 create an instance of the messagebus (usually a singleton will do) messagebus bus = new messagebus() 2 mark and configure your message subscription handlers (the methods that will receive the messages) with @subscribe notations 3 register these via bus.subscribe(listener) 4 send messages to these listeners via bus.publish(message) for synchronous publication, or bus.publishasync(message) for asynchronous publication 5 (optional) free resources and threads via bus.shutdown() when you are finished (usually on application exit). the difference between the sync and async is that with synchronous publication, all of the logic and method calls occur on the same thread that calls it; while with an asynchronous publication, all of these actions occur on a separate thread. please note that asynchronous publication is not in a guaranteed
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Top functions reviewed by kandi - BETA
- Publish a single message
- Publishes two messages
- Publish an ASM
- Publish a REFER_TH_2 message to the ring buffer
- Publish ASM_2 message
- Publish ASM
- This method is used to publish messages
- Creates a leaf if necessary
- Returns the value or creates a new one if it does not exist
- This is a convenience method for publishing two messages
- Creates a leaf if necessary
- Returns the value or creates a new one if it does not exist
- Used to publish a message to a publisher
- Creates a leaf if necessary
- Returns the value or creates a new one if it does not exist
- This is a convenience method for publishing messages
- Get the immediate subscriptions for the given message class
- This method is not thread safe
- Get the immediate subscriptions for the given message class
- Synchronously publish a message
- Get the immediate subscriptions for the given message class
- Synchronized event
- Clear all objects
- Creates a subscription for the given listener class
- Creates a subscription instance
- Compares this value for equality
- Compares this object with the given ID and ID
- Publish message
- Shuts down all pending work processors
- Compares this message with this object
- Publish the event
- Handle an error
MessageBus Key Features
MessageBus Examples and Code Snippets
Community Discussions
Trending Discussions on MessageBus
QUESTION
What is the best way to block shutdown of a service while jobs finish? I have a few background services that listen for messages on a message bus and handle processing.Some implement IHostService directly and some utilize BackgroundService
I know loops with a delay is absolutely not the best way, but this is the simplest illustration I can demonstrate. Another thought I had was a counter with number of total number of active jobs, but that would need a lock around it and I don't think that's a great idea either.
...ANSWER
Answered 2022-Mar-29 at 22:39Use CountdownEvent initialized with 1 and wait until it reaches zero like here. Increment the counter in the event when task is started, and decrement when finished using AddCount and Signal respectively. Just remember about last call to Signal in StopAsync to decrement the initial value.
QUESTION
How I can write this code with a single line?
...ANSWER
Answered 2021-Dec-17 at 17:09You could get your IsVisible values with something like this:
QUESTION
I have a Jenkins job "FEXT_21.4_AUTOMATION", that is to execute some selenium test cases in docker, and the one of the post job work is to generate the allure report. But somehow, the report is always of 0 results !
Following picture is my job configuration.
As you may find in which, I have this command to have the test cases executed in docker.
...ANSWER
Answered 2021-Nov-20 at 11:12Instead of ${ROOT} use ${WORKSPACE}.
WORKSPACE is a Jenkins variable that contains the WORKSPACE PATH
-v ${WORKSPACE}/allure-reports:/allure-reports
Also, check after running the job if there are some alure results files in the /allure-results directory inside the Jenkins workspace here:
If you don't see any results files in the workspace, it's because you are not mounting the right internal directory in the container, in this case /allure-reports (inside the container)
QUESTION
ANSWER
Answered 2021-Nov-03 at 07:16The signature certificate of the HarmonyOS application is different from the signature certificate of the Android application.
The signature certificate of the HarmonyOS application is a .p12 file. Like following:
You could check the signature certificate fingerprint as follows:
QUESTION
I have created a Masstransit publish filter, that creates a message header, based on information provided by an accessor.
I want to set some values in the accessor, during processing, which will be picked up by the publish filter.
The way I understand filters, is that they are scoped, and therefore, any message published, will create a new DI scope. This means that the values I set before publishing the message, will not be available in the filter.
...ANSWER
Answered 2021-Oct-27 at 15:16To use an existing scope, use IPublishEndpoint instead of IBus to publish the message. You should resolve IPublishEndpoint from the container scope service provider, and the scoped filter should use the same scope.
QUESTION
Building a rootfs using buildroot. My rootfs creates the "admin" user using this user-tables.txt:
...ANSWER
Answered 2021-Oct-19 at 08:30Just for reference to someone interested in this issue, the problem has been fixed. It was related with the "su" command, deployed by buildroot as a busybox applet. This applet doesn't work as expected despite CONFIG_PAM=y is enabled in busybox config file (vers 1.31.1).
This are the steps we followed to fix this:
- Remove "su" applet from busybox
QUESTION
There is a quite simple case I would like to implement: I have a base and DLT topics:
...ANSWER
Answered 2021-Sep-24 at 18:04This is a Kafka server configuration so you must set it on the server. The relevant property is:
QUESTION
Avalonia UI has an own implementation/version of ReactiveUI. How compatible is this library with the standard ReactiveUI library ?
In other words, can I create my models and viewmodels in a standard library with the nuget for the standard ReactiveUI library (not the avalonia one) and leave it up to the clients how to implement the UI/views ? If they prefer WPF, Xamarin, UNO or Maui (all possible with ReactiveUI at this moment), they can use one of these for the views. If they prefer avalonia for the views, they can use the Avalonia implementation. Is that possible ?
A second question is if the Avalonia-ReactiveUI messagebus is 100% compatible with regular ReactiveUI (for the same reason as mentioned before) ? So can I pass messages from regular/standard ReactiveUI to a AvaloniaUI-ReactiveUI implementation ?
...ANSWER
Answered 2021-Jun-03 at 19:07Avalonia is using standard ReactiveUI since 0.6.0. Avalonia.ReactiveUI package just configures the required services.
QUESTION
I'm trying to build a c++ project in VS Code but when i try to build it g++ throws an error saying:
...ANSWER
Answered 2021-May-13 at 11:56You list the "working" command as:
QUESTION
Trying to follow the example on how to test a Saga that uses DI (https://masstransit-project.com/usage/testing.html#testing-using-dependency-injection)
...ANSWER
Answered 2021-May-12 at 12:28There is support, you just have to configure it:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install MessageBus
You can use MessageBus like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the MessageBus component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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