MicroProfile Long Running Actions

Eclipse MicroProfile LRA Feature - Parent POM

License	Apache License, Version 2.0
Categories	Narayana Application Layer Libs Distributed Transactions
GroupId	io.narayana.microprofile.lra
ArtifactId	microprofile-lra-parent
Last Version	0.0.3.Final
Release Date	Jul 13, 2018
Type	pom
Description	MicroProfile Long Running Actions Eclipse MicroProfile LRA Feature - Parent POM
Project URL	http://microprofile.io
Project Organization	Eclipse Foundation
Source Code Management	https://github.com/eclipse/microprofile-lra

Download microprofile-lra-parent

Filename	Size
microprofile-lra-parent-0.0.3.Final.pom	13 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/io.narayana.microprofile.lra/microprofile-lra-parent/ -->
<dependency>
    <groupId>io.narayana.microprofile.lra</groupId>
    <artifactId>microprofile-lra-parent</artifactId>
    <version>0.0.3.Final</version>
    <type>pom</type>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/io.narayana.microprofile.lra/microprofile-lra-parent/
implementation 'io.narayana.microprofile.lra:microprofile-lra-parent:0.0.3.Final'

Gradle Kotlin

// https://jarcasting.com/artifacts/io.narayana.microprofile.lra/microprofile-lra-parent/
implementation ("io.narayana.microprofile.lra:microprofile-lra-parent:0.0.3.Final")

Apache Buildr

'io.narayana.microprofile.lra:microprofile-lra-parent:pom:0.0.3.Final'

Apache Ivy

<dependency org="io.narayana.microprofile.lra" name="microprofile-lra-parent" rev="0.0.3.Final">
  <artifact name="microprofile-lra-parent" type="pom" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='io.narayana.microprofile.lra', module='microprofile-lra-parent', version='0.0.3.Final')
)

Scala SBT

libraryDependencies += "io.narayana.microprofile.lra" % "microprofile-lra-parent" % "0.0.3.Final"

Leiningen

[io.narayana.microprofile.lra/microprofile-lra-parent "0.0.3.Final"]

Dependencies

There are no dependencies for this project. It is a standalone project that does not depend on any other jars.

Project Modules

• api
• tck
• spec

Long Running Actions for MicroProfile

Introduction

The specification introduces APIs for services to coordinate activities.

The main thrust of the proposal introduces an API for loosely coupled services to coordinate long running activities in such a way as to guarantee a globally consistent outcome without the need to take locks on data.

Motivation

In a loosely coupled service based environment there is sometimes a need for different services to provide consistency guarantees. Typical examples include:

• order processing involving three services (take order, bill customer, ship product). If the shipping service finds that it is out of stock then the customer will have been billed with no prospect of receiving his item;

• an airline overbooks a flight which means that the booking count and the flight capacity are inconsistent.

There are various ways that systems overcome such inconsistency but it would be advantageous to provide a generic solution which handles failure conditions, maintains state for those flows that span long periods of time and ensures that remedial activities are called correctly.

Traditional techniques for guaranteeing consistency in distributed environments has focused on XA transactions where locks may be held for long periods thereby introducing strong coupling between services and decreasing concurrency to unacceptable levels. Additionally, if such a transaction aborts then valuable work which may be valid will be rolled back. In view of these issues an alternative approach is desirable.

Goals

• support long running actions

• no strong coupling between services

• allow actions to finish early

• allow compensating actions if a business activity is cancelled

Contributing

Do you want to contribute to this project? Find out how you can help here.

Eclipse Foundation

Versions

Version
0.0.3.Final Jul 13, 2018
0.0.2.Final Jul 6, 2018
0.0.1.Final May 29, 2018