Saga | Saga pattern implementation in Kotlin build | Microservice library
kandi X-RAY | Saga Summary
kandi X-RAY | Saga Summary
The saga design pattern is a way to manage data consistency across microservices in distributed transaction scenarios. A [Saga] is useful when you need to manage data in a consistent manner across services in distributed transaction scenarios. Or when you need to compose multiple [action]s with a [compensation] that needs to run in a transaction like style. For example, let's say that we have following domain types Order, Payment. The creation of an Order can only remain when a payment has been made. In SQL you might run this inside a transaction, which can automatically rollback the creation of the Order when the creation of the Payment fails. When you need to do this across distributed services, or a multiple atomic references, etc you need to manually facilitate the rolling back of the performed actions, or compensating actions. The [Saga] type, and [saga] DSL remove all the boilerplate of manually having to facilitate this with a convenient suspending DSL.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Saga
Saga Key Features
Saga Examples and Code Snippets
repositories {
mavenCentral()
}
dependencies {
implementation("io.github.nomisrev:saga:0.1.3")
}
data class Order(val id: UUID, val amount: Long)
data class Payment(val id: UUID, val orderId: UUID)
data class Order(val id: UUID, val amount
Community Discussions
Trending Discussions on Saga
QUESTION
I have been using github actions for quite sometime but today my deployments started failing. Below is the error from github action logs
...ANSWER
Answered 2022-Mar-16 at 07:01First, this error message is indeed expected on Jan. 11th, 2022.
See "Improving Git protocol security on GitHub".
January 11, 2022 Final brownout.
This is the full brownout period where we’ll temporarily stop accepting the deprecated key and signature types, ciphers, and MACs, and the unencrypted Git protocol.
This will help clients discover any lingering use of older keys or old URLs.
Second, check your package.json
dependencies for any git://
URL, as in this example, fixed in this PR.
As noted by Jörg W Mittag:
For GitHub Actions:There was a 4-month warning.
The entire Internet has been moving away from unauthenticated, unencrypted protocols for a decade, it's not like this is a huge surprise.Personally, I consider it less an "issue" and more "detecting unmaintained dependencies".
Plus, this is still only the brownout period, so the protocol will only be disabled for a short period of time, allowing developers to discover the problem.
The permanent shutdown is not until March 15th.
As in actions/checkout issue 14, you can add as a first step:
QUESTION
I am getting the below error in fresh react-native installation and when trying to do pod install.
...ANSWER
Answered 2021-Nov-10 at 11:01If You don't use M1 based computer to build, You can comment "__apply_Xcode_12_5_M1_post_install_workaround(installer)" line in Your Podfile.
QUESTION
I am very confused with Redux as I am learning different methods.
I want to know how many more methods are there like redux-Thunk
, redux-saga
. All of them use a different function like CreateSlice. Which methods are suitable for small projects and what is the main difference between them.
ANSWER
Answered 2022-Jan-27 at 10:17I'd recommend giving the official Redux Style Guide a read.
Generally: at this moment, there are 14818 redux-themed packages available on npm
. It's pretty impossible to name them all ;)
But also, there are clear recommendations by the Redux team:
- use Redux Toolkit
- if you only need api data without further manual logic, use
createApi
form RTK-Query - if you need manual logic attached to that, use
createAsyncThunk
or just thunks. Only if those are not enough, turn to other middlewares like saga - sagas are very overused, most of the time not needed and add unneccesary complexity. We are currently building an action-listener-middleware that covers about 75% of the saga functionality with a simpler api (those 25% functionality left after that are the real saga use case, but probably only 2-5% of users ever need those).
That said, most people would not even need that and could probably do everything they are using sagas for with thunks instead, which are much more simple.
There are also other libraries like redux-observable etc. Those have a non-deniable market share in the single-digit percentages, but if you are just getting started, go by the official recommendations.
Best get started by reading the official Redux Tutorial. It should cover 90% of all the Redux knowledge you'll ever need.
QUESTION
I am trying to test the below saga, but it keeps failing, I think my main issue is mocking up the result, error msg & token status in race effect.
Saga
...ANSWER
Answered 2022-Jan-26 at 12:09From what I can tell there seem to be few small issues,
In the success test, you are using
onSuccess
andonError
in the action, however the saga implementation expectssuccess
anderror
properties instead.In the error test, you are defining your token selector as:
QUESTION
I am testing my redux-saga-flow, and I have an issue with testing selector method with select.
Selector
...ANSWER
Answered 2021-Dec-08 at 01:57"redux-saga-test-plan": "^4.0.1"
.
Option 1. Use withState:
For static state, you can just use the
withState
method to allowselect
effects to work.
Option 2. Use static provider
You can provide mock values in a terse manner via static providers. Pass in an array of tuple pairs (array pairs) into the
provide
method. For each pair, the first element should be a matcher for matching the effect and the second effect should be the mock value you want to provide.
E.g.
saga.ts
:
QUESTION
ANSWER
Answered 2021-Dec-03 at 23:32Here is a flexbox sample of your code and need some change, good luck.
QUESTION
I am using React native with Redux-saga. When I try to pass value saga true my back end...I got an error message like this. And I have already tried the same question answer in StackOverflow, But this answer did not work for me. I am a student, so I don't know much more. If anyone can help me with this, I really grateful to you all.❤️
...ANSWER
Answered 2021-Nov-16 at 16:43Try passing arguments like this:
QUESTION
I have a React application where I'm using Redux and Redux-Saga and Reselect as selector library (with Immer to handle the immutability of the Redux state). I'm writing this question because I'd like to understand if my approach to handle the selector with argument is fully correct.
I personally prefer to avoid the yield select
into the sagas because I'd like to keep the middleware not depend on the Store's state, but I have legacy code that has sagas with yield select
in it.
Here below the code that I have to write to implement my selector and invoke him into the component and into the saga. I got the selector implementation from the Reselec doc.
...ANSWER
Answered 2021-Nov-09 at 10:38The select
effect creator accepts additional arguments after the selector function which are then send to the selector itself, so you can do this:
const person = yield select(makeGetPerson, id);
Docs: https://redux-saga.js.org/docs/api/#selectselector-args
QUESTION
I have a react project set up to work with redux saga, but for some reason, I'm unable to cancel a running saga / action task. The expectancy is that, after some action, (like user navigating away, or clicking on a button), the running saga would be cancelled. Tried catching the cancelled action, but doesn't happen after the saga has run completely:
...ANSWER
Answered 2021-Oct-26 at 08:18When you cancel a saga, all sub tasks cancel. Example:
QUESTION
I have the below two tests
...ANSWER
Answered 2021-Oct-28 at 21:44I think the problem is that both tests use the same reference of SessionReducer._initialState
. When you pass it to the state in withReducer
, it isn't cloned in any way and so you end up working with the same object in memory.
There is lots of way how to fix it, e.g. you can have a method instead of a property to create the initial object:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install Saga
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page