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https://github.com/googleapis/gax-java

This library has moved to https://github.com/googleapis/sdk-platform-java/tree/main/gax-java.
https://github.com/googleapis/gax-java

grpc java

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This library has moved to https://github.com/googleapis/sdk-platform-java/tree/main/gax-java.

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README 

        
Google API Extensions for Java

==============================



[![Build Status](https://travis-ci.org/googleapis/gax-java.svg?branch=main)](https://travis-ci.org/googleapis/gax-java)



🚌 In January 2023, this library has moved to [gapic-generator-java/gax-java](https://github.com/googleapis/gapic-generator-java/tree/main/gax-java). This repository will be archived in the future. Future releases will appear in the new repository (https://github.com/googleapis/gapic-generator-java/releases).

The Maven artifact coordinates (com.google.api:gax) remain the same.



- [Documentation](https://googleapis.dev/java/gax/latest/)



Google API Extensions for Java (GAX Java) is a library which aids in the

development of client libraries for server APIs, based on [GRPC](http://grpc.io)

and Google API conventions.



Application code will rarely need to use most of the classes within this

library directly, but code generated automatically from the API definition

files can use services such as paged list iteration, request batching, and

polling of long-running operations to provide a more convenient and idiomatic

API surface to callers.



Currently, this library shouldn't be used independently from google-cloud-java, otherwise there is

a high risk of diamond dependency problems, because google-cloud-java uses beta features from this

library which can change in breaking ways between versions. See [VERSIONING](#versioning) for

more information.



> For new and existing Developers/ Contributors:

> 

> In December 2022, gax-java's build tool has been migrated from gradle to maven. 

> Gradle related files are no longer being maintained and will be eventually removed.

> 

> The artifact coordinates in Maven Central (`{{ group_id }}:{{ artifact_id }}`) remain the same.



Quickstart

----------



[//]: # ({x-version-update-start:gax:released})

If you are using Maven, add this to your pom.xml file

```xml



  com.google.api

  gax

  2.8.1



  com.google.api

  gax-grpc

  2.8.1



```



If you are using Gradle, add this to your dependencies



```Groovy

compile 'com.google.api:gax:2.8.1',

  'com.google.api:gax-grpc:2.8.1'

```



If you are using SBT, add this to your dependencies



```Scala

libraryDependencies += "com.google.api" % "gax" % "2.8.1"

libraryDependencies += "com.google.api" % "gax-grpc" % "2.8.1"

```

[//]: # ({x-version-update-end})



Java Versions

-------------



Java 8 or above is required for using this library.



To build this project, JDK 11 or above is required.

The build produces Java bytecode targeted for Java 8.



The project uses Gradle to build while it also provides Bazel build.



If you build this project in Bazel, it requires Bazel 4 and basic UNIX commands

(e.g., `cat`).



Contributing

------------



Contributions to this library are always welcome and highly encouraged.



See the [CONTRIBUTING] documentation for more information on how to get started.



Versioning

----------



This library follows [Semantic Versioning](http://semver.org/), but with some

additional qualifications:



1. Components marked with `@BetaApi` are considered to be "0.x" features inside

   a "1.x" library. This means they can change between minor and patch releases

   in incompatible ways. These features should not be used by any library "B"

   that itself has consumers, unless the components of library B that use

   `@BetaApi` features are also marked with `@BetaApi`. Features marked as

   `@BetaApi` are on a path to eventually become "1.x" features with the marker

   removed.



   **Special exception for google-cloud-java**: google-cloud-java is

   allowed to depend on `@BetaApi` features without declaring the consuming

   code `@BetaApi`, because gax-java and google-cloud-java move in step

   with each other. For this reason, gax-java should not be used

   independently of google-cloud-java.



1. Components marked with `@InternalApi` are technically public, but are only

   public for technical reasons, because of the limitations of Java's access

   modifiers. For the purposes of semver, they should be considered private.



1. Components marked with `@InternalExtensionOnly` are stable for usage, but

   not for extension. Thus, methods will not be removed from interfaces marked

   with this annotation, but methods can be added, thus breaking any

   code implementing the interface. See the javadocs for more details on other

   consequences of this annotation.



### Submodule notes



- `gax` is stable (>= 1.0.0), so anything not marked `@BetaApi`, `@InternalApi`,

or `@InternalExtensionOnly` won't break between minor releases. Anything marked

`@InternalExtensionOnly` can only break extensions between minor releases.

- `gax-grpc` is stable (>= 1.0.0), so anything not marked `@BetaApi`, `@InternalApi`,

or `@InternalExtensionOnly` won't break between minor releases. Anything marked

`@InternalExtensionOnly` can only break extensions between minor releases.

- `gax-httpjson` is beta (0.x.y), so anything may change at any time and the public

API should not be considered stable. There is no difference whether a class is

marked `@BetaApi` or not; that annotation is only present as a reminder. There is

also no difference whether a class is marked `@InternalExtensionOnly` or not; that

only implies that the annotation will still be present in 1.0.0.



### Feature notes



- **Long Running Operations** - This feature is not yet considered stable.

- **Streaming** - Streaming features are not yet considered stable.

- **Batching** - Batching features are not yet considered stable.

- **Generated Code Support** - Features to support generated code is not yet

  considered stable.

- **Testing** - There are no plans to consider any code in the testlib jar to be stable.



Repository Structure

--------------------



This repository contains the following java packages.



### gax



- `com.google.api.gax.batching` - Contains general-purpose batching logic.

- `com.google.api.gax.core` - Contains core interfaces and classes that are not

  specific to grpc and could be used in other contexts.

- `com.google.api.gax.longrunning` - Contains classes related to long running

  operations.

- `com.google.api.gax.paging` - Contains classes related to list calls that return

  results in pages.

- `com.google.api.gax.retrying` - Contains classes related to retrying API calls.

- `com.google.api.gax.rpc` - Contains classes related to making RPC calls.



### gax-grpc



- `com.google.api.gax.grpc` - Contains classes that provide functionality on top

  of gRPC calls.

- `com.google.longrunning` - Contains the mix-in client for long-running operations

  which is implemented by a number of Google APIs.



### gax-httpjson



- `com.google.api.gax.httpjson` - Contains classes that provide functionality on

  top of http/json calls.



License

-------



BSD - See [LICENSE] for more information.



[CONTRIBUTING]:https://github.com/googleapis/gax-java/blob/main/CONTRIBUTING.md

[LICENSE]: https://github.com/googleapis/gax-java/blob/main/LICENSE