121 lines
4.5 KiB
Plaintext
121 lines
4.5 KiB
Plaintext
[[java-rest-high-usage]]
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== Getting started
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This section describes how to get started with the high-level REST client from
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getting the artifact to using it in an application.
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[[java-rest-high-compatibility]]
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=== Compatibility
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The Java High Level REST Client requires Java 1.8 and depends on the Elasticsearch
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core project. The client version is the same as the Elasticsearch version that the
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client was developed for. It accepts the same request arguments as the `TransportClient`
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and returns the same response objects.
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The High Level Client is backwards compatible but can only communicate with Elasticsearch
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version 5.5 and onwards. The High Level Client is forward compatible as well, meaning that
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it supports communicating with a later version of Elasticsearch than the one it was developed
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for. It is recommended to upgrade the High Level Client when upgrading the Elasticsearch
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cluster to a new major version, as REST API breaking changes may cause unexpected results,
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and newly added APIs will only be supported by the newer version of the client. The client
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should be updated last, once all of the nodes in the cluster have been upgraded.
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[[java-rest-high-javadoc]]
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=== Javadoc
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The javadoc for the REST high level client can be found at {rest-high-level-client-javadoc}/index.html.
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[[java-rest-high-usage-maven]]
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=== Maven Repository
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The high-level Java REST client is hosted on
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http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.elasticsearch.client%22[Maven
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Central]. The minimum Java version required is `1.8`.
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The High Level REST Client is subject to the same release cycle as
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Elasticsearch. Replace the version with the desired client version.
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[[java-rest-high-usage-maven-maven]]
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==== Maven configuration
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Here is how you can configure the dependency using maven as a dependency manager.
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Add the following to your `pom.xml` file:
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["source","xml",subs="attributes"]
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--------------------------------------------------
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<dependency>
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<groupId>org.elasticsearch.client</groupId>
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<artifactId>elasticsearch-rest-high-level-client</artifactId>
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<version>{version}</version>
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</dependency>
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--------------------------------------------------
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[[java-rest-high-usage-maven-gradle]]
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==== Gradle configuration
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Here is how you can configure the dependency using gradle as a dependency manager.
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Add the following to your `build.gradle` file:
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["source","groovy",subs="attributes"]
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--------------------------------------------------
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dependencies {
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compile 'org.elasticsearch.client:elasticsearch-rest-high-level-client:{version}'
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}
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--------------------------------------------------
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[[java-rest-high-usage-maven-lucene]]
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==== Lucene Snapshot repository
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The very first releases of any major version (like a beta), might have been built on top of a Lucene Snapshot version.
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In such a case you will be unable to resolve the Lucene dependencies of the client.
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For example, if you want to use the `6.0.0-beta1` version which depends on Lucene `7.0.0-snapshot-00142c9`, you must
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define the following repository.
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For Maven:
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["source","xml",subs="attributes"]
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--------------------------------------------------
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<repository>
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<id>elastic-lucene-snapshots</id>
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<name>Elastic Lucene Snapshots</name>
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<url>http://s3.amazonaws.com/download.elasticsearch.org/lucenesnapshots/00142c9</url>
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<releases><enabled>true</enabled></releases>
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<snapshots><enabled>false</enabled></snapshots>
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</repository>
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--------------------------------------------------
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For Gradle:
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["source","groovy",subs="attributes"]
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--------------------------------------------------
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maven {
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url 'http://s3.amazonaws.com/download.elasticsearch.org/lucenesnapshots/00142c9'
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}
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--------------------------------------------------
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[[java-rest-high-usage-dependencies]]
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=== Dependencies
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The High Level Java REST Client depends on the following artifacts and their
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transitive dependencies:
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- org.elasticsearch.client:elasticsearch-rest-client
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- org.elasticsearch:elasticsearch
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[[java-rest-high-usage-initialization]]
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=== Initialization
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A `RestHighLevelClient` instance needs a <<java-rest-low-usage-initialization,REST low-level client>>
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to be built as follows:
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[source,java]
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--------------------------------------------------
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RestHighLevelClient client =
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new RestHighLevelClient(lowLevelRestClient); <1>
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--------------------------------------------------
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<1> We pass the <<java-rest-low-usage-initialization,REST low-level client>> instance
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In the rest of this documentation about the Java High Level Client, the `RestHighLevelClient` instance
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will be referenced as `client`.
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