Commit Graph

57 Commits

Author SHA1 Message Date
Vlad Rozov 362f116abe
Replace metadata keys in OpenSearchException during serialization and deserialization (#905)
Signed-off-by: Vlad Rozov <vrozov@users.noreply.github.com>
2021-06-30 11:39:26 -07:00
Nick Knize 0317b604f6
[BUG] Fix versioning issues discovered through version bump (#884)
This commit fixes up the version framework to ensure a smooth version bump
across releases.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>
2021-06-25 16:53:06 -05:00
Nick Knize d821b15a6b
[BWC] fix mixedCluster and rolling upgrades (#775)
This commit fixes mixedCluster and rolling upgrades by spoofing OpenSearch
version 1.0.0 as Legacy version 7.10.2. With this commit an OpenSearch 1.x node
can join a legacy (<= 7.10.2) cluster and rolling upgrades work as expected.
Mixed clusters will not work beyond the duration of the upgrade since shards
cannot be replicated from upgraded nodes to nodes running older versions.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>

Co-authored-by: Shweta Thareja <tharejas@amazon.com>
2021-05-28 00:42:57 -05:00
Nick Knize 9168f1fb43
[License] Add SPDX and OpenSearch Modification license header (#509)
This commit adds the SPDX Apache-2.0 license header along with an additional
copyright header for all modifications.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>
2021-04-09 14:28:18 -05:00
Nick Knize 5b46a05702 [Rename] remaining packages and resources in test/fixture (#364)
This commit refactors the remaining o.e.index and o.e.test packages in the
test/fixtures module. References throughout the codebase are also refactored.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>
2021-03-21 20:56:34 -05:00
Harold Wang a011c15bc8 Rename files under qa folder (#212)
* Rename directory elasticsearch to opensearch
Rename EvilElasticsearchCliTests EvilOpenSearchCliTests

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename org.elasticsearch to org.opensearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename waitForElasticsearch to waitForOpenSearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename OpensearchNode to OpenSearchNode

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename "elasticsearch.version" to "opensearch.version"

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearchVersionString to opensearchVersionString

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch.yml to opensearch.yml

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename runElasticsearchTests to runOpenSearchTests

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearchVersion to opensearchVersion

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch to opensearch in gradle files

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename ElasticsearchAssertions to OpenSearchAssertions

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename folder share/elasticsearch to share/opensearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch to opensearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch-service-x64 to opensearch-service-x64

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch-service.bat to opensearch-service.bat

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename Elasticsearch to Opensearch
Rename elasticsearch to opensearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename ELASTIC_PASSWORD_FILE to OPENSEARCH_PASSWORD_FILE

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename ELASTICSEARCH_PASSWORD to OPENSEARCH_PASSWORD
Rename elasticsearch to opensearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch to opensearch

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch.log to opensearch.log

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename es-repo to opensearch-repo

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename ESTestCase to OpenSearchTestCase

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename ESRestTestCase to OpenSearchRestTestCase

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch to opensearch
Rename "Starts ElasticSearch" to "Starts OpenSearch"

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename ESElasticsearchCliTestCase to BaseOpenSearchCliTestCase

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename "elasticsearch:test" to "opensearch:test"

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename test91ElasticsearchShardCliPackaging to test91OpenSearchShardCliPackaging

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch.toString to opensearch.toString

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename elasticsearch.pid to opensearch.pid

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename "Opensearch" to "OpenSearch"
Rename "elasticsearch" to "opensearch"

Signed-off-by: Harold Wang <harowang@amazon.com>

* Rename Elasticsearch to OpenSearch
Remove unecessary dot after opensearch.

Signed-off-by: Harold Wang <harowang@amazon.com>
2021-03-21 20:56:34 -05:00
Harold Wang 844e56abf3 [Rename] Rename files under "qa" folder (#194)
* [Rename] Rename qa folder

Signed-off-by: Harold Wang <harowang@amazon.com>

* Remove the dot in the end of "package org.opensearch."

Signed-off-by: Harold Wang <harowang@amazon.com>

* Add semicolon

Signed-off-by: Harold Wang <harowang@amazon.com>
2021-03-21 20:56:34 -05:00
Rene Groeschke f58ebe58ee
Use services for archive and file operations in tasks (#62968) (#63201)
Referencing a project instance during task execution is discouraged by
Gradle and should be avoided. E.g. It is incompatible with Gradles
incubating configuration cache. Instead there are services available to handle
archive and filesystem operations in task actions.

Brings us one step closer to #57918
2020-10-05 15:52:15 +02:00
Rene Groeschke bdd7347bbf
Merge test runner task into RestIntegTest (7.x backport) (#60600)
* Merge test runner task into RestIntegTest (#60261)
* Merge test runner task into RestIntegTest
* Reorganizing Standalone runner and RestIntegTest task
* Rework general test task configuration and extension
* Fix merge issues
* use former 7.x common test configuration
2020-08-04 14:46:32 +02:00
Nhat Nguyen 120fe96402 Log shard list in testIndexVersionPropagation
Relates #59494
2020-07-18 23:23:57 -04:00
Jake Landis 604c6dd528
7.x - Create plugin for yamlTest task (#56841) (#59090)
This commit creates a new Gradle plugin to provide a separate task name
and source set for running YAML based REST tests. The only project
converted to use the new plugin in this PR is distribution/archives/integ-test-zip.
For which the testing has been moved to :rest-api-spec since it makes the most
sense and it avoids a small but awkward change to the distribution plugin.

The remaining cases in modules, plugins, and x-pack will be handled in followups.

This plugin is distinctly different from the plugin introduced in #55896 since
the YAML REST tests are intended to be black box tests over HTTP. As such they
should not (by default) have access to the classpath for that which they are testing.

The YAML based REST tests will be moved to separate source sets (yamlRestTest).
The which source is the target for the test resources is dependent on if this
new plugin is applied. If it is not applied, it will default to the test source
set.

Further, this introduces a breaking change for plugin developers that
use the YAML testing framework. They will now need to either use the new source set
and matching task, or configure the rest resources to use the old "test" source set that
matches the old integTest task. (The former should be preferred).

As part of this change (which is also breaking for plugin developers) the
rest resources plugin has been removed from the build plugin and now requires
either explicit application or application via the new YAML REST test plugin.

Plugin developers should be able to fix the breaking changes to the YAML tests
by adding apply plugin: 'elasticsearch.yaml-rest-test' and moving the YAML tests
under a yamlRestTest folder (instead of test)
2020-07-06 14:16:26 -05:00
Rene Groeschke c29bc87040
Move bwcVersions extension property to BuildParams (back port) (#56381)
* Move bwcVersions extension property to BuildParams (#56206)
* Fix :qa Task Using Broken BwC Versions Resolution (#56332)

Co-authored-by: Armin Braun <me@obrown.io>
2020-05-11 09:39:13 +02:00
Jason Tedor 5fcda57b37
Rename MetaData to Metadata in all of the places (#54519)
This is a simple naming change PR, to fix the fact that "metadata" is a
single English word, and for too long we have not followed general
naming conventions for it. We are also not consistent about it, for
example, METADATA instead of META_DATA if we were trying to be
consistent with MetaData (although METADATA is correct when considered
in the context of "metadata"). This was a simple find and replace across
the code base, only taking a few minutes to fix this naming issue
forever.
2020-03-31 17:24:38 -04:00
Mark Vieira 4b528d97ad
Consolidate duplication of BWC testing task setup in script plugin (#53079)
(cherry picked from commit 33fc8e7ebfac8d47a5f9f026b3836bb47bea141a)
2020-03-03 14:43:02 -08:00
Jake Landis 8d311297ca
[7.x] Smarter copying of the rest specs and tests (#52114) (#52798)
* Smarter copying of the rest specs and tests (#52114)

This PR addresses the unnecessary copying of the rest specs and allows
for better semantics for which specs and tests are copied. By default
the rest specs will get copied if the project applies
`elasticsearch.standalone-rest-test` or `esplugin` and the project
has rest tests or you configure the custom extension `restResources`.

This PR also removes the need for dozens of places where the x-pack
specs were copied by supporting copying of the x-pack rest specs too.

The plugin/task introduced here can also copy the rest tests to the
local project through a similar configuration.

The new plugin/task allows a user to minimize the surface area of
which rest specs are copied. Per project can be configured to include
only a subset of the specs (or tests). Configuring a project to only
copy the specs when actually needed should help with build cache hit
rates since we can better define what is actually in use.
However, project level optimizations for build cache hit rates are
not included with this PR.

Also, with this PR you can no longer use the includePackaged flag on
integTest task.

The following items are included in this PR:
* new plugin: `elasticsearch.rest-resources`
* new tasks: CopyRestApiTask and CopyRestTestsTask - performs the copy
* new extension 'restResources'
```
restResources {
  restApi {
    includeCore 'foo' , 'bar' //will include the core specs that start with foo and bar
    includeXpack 'baz' //will include x-pack specs that start with baz
  }
  restTests {
    includeCore 'foo', 'bar' //will include the core tests that start with foo and bar
    includeXpack 'baz' //will include the x-pack tests that start with baz
  }
}

```
2020-02-26 08:13:41 -06:00
Mark Vieira 8d2370bf00
Always use bundled JDK for external cluster nodes when BWC testing (#51505) (#51701) 2020-01-30 14:35:43 -08:00
Rory Hunter c46a0e8708
Apply 2-space indent to all gradle scripts (#49071)
Backport of #48849. Update `.editorconfig` to make the Java settings the
default for all files, and then apply a 2-space indent to all `*.gradle`
files. Then reformat all the files.
2019-11-14 11:01:23 +00:00
Mark Vieira 6ab4645f4e
[7.x] Introduce type-safe and consistent pattern for handling build globals (#48818)
This commit introduces a consistent, and type-safe manner for handling
global build parameters through out our build logic. Primarily this
replaces the existing usages of extra properties with static accessors.
It also introduces and explicit API for initialization and mutation of
any such parameters, as well as better error handling for uninitialized
or eager access of parameter values.

Closes #42042
2019-11-01 11:33:11 -07:00
Alpar Torok 2b16d7bcf8
Backport testclusters all (#47565)
* Bwc testclusters all (#46265)

Convert all bwc projects to testclusters

* Fix bwc versions config

* WIP fix rolling upgrade

* Fix bwc tests on old versions

* Fix rolling upgrade
2019-10-04 16:12:53 +03:00
Mark Vieira 1287c7d91f
[Backport] Replace usages RandomizedTestingTask with built-in Gradle Test (#40978) (#40993)
* Replace usages RandomizedTestingTask with built-in Gradle Test (#40978)

This commit replaces the existing RandomizedTestingTask and supporting code with Gradle's built-in JUnit support via the Test task type. Additionally, the previous workaround to disable all tasks named "test" and create new unit testing tasks named "unitTest" has been removed such that the "test" task now runs unit tests as per the normal Gradle Java plugin conventions.

(cherry picked from commit 323f312bbc829a63056a79ebe45adced5099f6e6)

* Fix forking JVM runner

* Don't bump shadow plugin version
2019-04-09 11:52:50 -07:00
Alpar Torok bd4ca4c702 Rename integTest to bwcTestSample for bwc test projects (#38433)
* Rename integTest to bwcTestSample for bwc test projects

This change renames the `integTest` task to `bwcTestSample` for projects
testing bwc to make it possible to run all the bwc tests that check
would run without running on bwc tests.

This change makes it possible to add a new PR check on backports to make
sure these don't break BWC tests in master.

* Rename task as per PR
2019-02-11 15:05:16 +02:00
Alpar Torok e9ef5bdce8
Converting randomized testing to create a separate unitTest task instead of replacing the builtin test task (#36311)
- Create a separate unitTest task instead of Gradle's built in 
- convert all configuration to use the new task 
- the  built in task is now disabled
2018-12-19 08:25:20 +02:00
Mayya Sharipova f884b2b1cd
Deprecate types in index API (#36575)
* Deprecate types in index API

- deprecate type-based constructors of IndexRequest
- update tests to use typeless IndexRequest constructors
- no yaml tests as they have been already added in #35790

Relates to #35190
2018-12-18 08:53:49 -05:00
Julie Tibshirani 71a39d10be
Make sure that BWC tests run successfully, even with types deprecation messages. (#36511) 2018-12-12 12:57:32 -08:00
Julie Tibshirani eb733f404a Fix the mixed cluster REST test explain/11_basic_with_types. 2018-12-11 11:03:26 -08:00
Martijn van Groningen 5f7524bb89
fixed typo 2018-12-11 13:13:30 +01:00
Martijn van Groningen c635904a1b
muted mixed clusters explain/11_basic_with_types/Explain body without query element} test 2018-12-11 11:28:47 +01:00
Julie Tibshirani 99f89cd3b4
Deprecate types in get, exists, and multi get. (#35930)
For each API, the following updates were made:
- Add deprecation warnings to `Rest*Action`, plus tests in `Rest*ActionTests`.
- For each REST yml test, make sure there is one version without types, and another legacy version that retains types (called *_with_types.yml).
- Deprecate relevant methods on the Java HLRC requests/ responses.
- Update documentation (for both the REST API and Java HLRC).
2018-12-10 17:22:48 -08:00
Alpar Torok f8378d91a6
Implement VersionCollection in Java (#34050) 2018-11-01 17:43:57 +02:00
Nik Everett 232c71b6bf
QA: Create xpack yaml features (#31403)
This creates a YAML test "features" that indices if the cluster being
tested has xpack installed (`xpack`) or if it does *not* have xpack
installed (`no_xpack`). It uses those features to centralize skipping
a few tests that fail if xpack is installed.

The plan is to use this in a followup to skip docs tests that require
xpack when xpack is not installed. We *plan* to use the declaration
of required license level on the docs page to generate the required
`skip`.

Closes #30933.
2018-06-26 09:26:48 -04:00
Nik Everett 6695d11a97
Switch many QA projects to use new style requests (#30574)
In #29623 we added `Request` object flavored requests to the low level
REST client and in #30315 we deprecated the the old requests. This
changes many calls in the `qa` projects to use the new version.
2018-05-15 17:48:47 -04:00
Nik Everett 869b639d14
QA: System property to override distribution (#30591)
This configures all `qa` projects to use the distribution contained in
the `tests.distribution` system property if it is set. The goal is to
create a simple way to run tests against the default distribution which
has x-pack basic features enabled while not forcing these tests on all
contributors. You run these tests by doing something like:

```
./gradlew -p qa -Dtests.distribution=zip check
```

or

```
./gradlew -p qa -Dtests.distribution=zip bwcTest
```

x-pack basic *shouldn't* get in the way of any of these tests but
nothing is ever perfect so this we have to disable a few when running
with the zip distribution.
2018-05-15 17:16:16 -04:00
Lee Hinman 8e8fdc4f0e
Decouple XContentBuilder from BytesReference (#28972)
* Decouple XContentBuilder from BytesReference

This commit removes all mentions of `BytesReference` from `XContentBuilder`.
This is needed so that we can completely decouple the XContent code and move it
into its own dependency.

While this change appears large, it is due to two main changes, moving
`.bytes()` and `.string()` out of XContentBuilder itself into static methods
`BytesReference.bytes` and `Strings.toString` respectively. The rest of the
change is code reacting to these changes (the majority of it in tests).

Relates to #28504
2018-03-14 13:47:57 -06:00
Ryan Ernst 3a64e6d121
Test: Remove specifying zip distribution in qa tests (#28805)
Applying the rest test gradle plugin already uses the zip distribution
by default, so specifying it explicitly is not necessary. These are
leftovers from before zip was the default for rest tests.
2018-02-23 13:45:38 -08:00
Michael Basnight e0bea70070
Generalize BWC logic (#28505)
Generalizing BWC building so that there is less code to modify for a release. This ensures we do not
need to think about what major or minor version is in the gradle code. It follows the general rules of the
elastic release structure. For more information on the rules, see the VersionCollection's javadoc.

This also removes the additional bwc snapshots that will never be released, such as 6.0.2, which were
being built and tested against every time we ran bwc tests.

Additionally, it creates 4 new projects that correspond to the different types of snapshots that may exist
for a given version. Its possible to now run those individual tasks to work out bwc logic whereas
previously it was impossible and the entire suite of bwc tests had to be run to work out any logic
changes in the build tools' bwc project. Please note that if the project does not make sense for the 
version that is current, that an error will be thrown from that individual project if an attempt is made to 
run it.

This should allow for automating the version bumps as well, since it removes all the hardcoded version
logic from the configs.
2018-02-09 14:55:10 -06:00
Nhat Nguyen 0edde25f09 TEST: use new nodes assumption in testUpdateSnapshotStatus
Using an assertion is not correct here as the list of new nodes can be
empty.
2018-02-08 13:11:21 -05:00
Luca Cavanna d860971572
REST high-level client: add support for split and shrink index API (#28425)
Relates to #27205
2018-02-01 16:37:01 +01:00
Ryan Ernst d36ec18029
Plugins: Add plugin extension capabilities (#27881)
This commit adds the infrastructure to plugin building and loading to
allow one plugin to extend another. That is, one plugin may extend
another by the "parent" plugin allowing itself to be extended through
java SPI. When all plugins extending a plugin are finished loading, the
"parent" plugin has a callback (through the ExtensiblePlugin interface)
allowing it to reload SPI.

This commit also adds an example plugin which uses as-yet implemented
extensibility (adding to the painless whitelist).
2018-01-03 11:12:43 -08:00
jaymode 541e142a6d
Revert "Increase logging on qa:mixed-cluster tests"
This reverts commit e04e5ab037 as we no longer need the increased
logging for the mixed cluster tests. This will reduce the size of logs for some build failures.
2017-12-15 10:44:35 -07:00
Boaz Leskes 1a976ea7a4 Cherry pick tests and seqNo recovery hardning from #27580 2017-12-04 13:15:40 +01:00
David Turner 89ba8996c6 Consolidate version numbering semantics (#27397)
Fixes to the build system, particularly around BWC testing, and to make future
version bumps less painful.
2017-11-23 20:21:53 +00:00
Nhat Nguyen db688e1a17
Uses TransportMasterNodeAction to update shard snapshot status (#27165)
Currently, we are using a plain TransportRequestHandler to post snapshot
status messages to the master. However, it doesn't have a robust retry
mechanism as TransportMasterNodeAction. This change migrates from
TransportRequestHandler to TransportMasterNodeAction for the new
versions and keeps the current implementation for the old versions.

Closes #27151
2017-11-17 11:54:44 -05:00
Yannick Welsch e04e5ab037 Increase logging on qa:mixed-cluster tests
Hopefully helps to figure out why the nodes have trouble starting up.
2017-11-09 15:18:53 +01:00
Martijn van Groningen 9e67cca987
build: Fix setting the incorrect bwc version in mixed cluster qa module
Prior to this change if the `bwcTest` task is run then it would create
task for each version, but each task in reality would use wireCompatVersions - 1
ES version. So we were not actually testing against 5.6.x versions in the
6.x and 6.0 branches.
2017-11-03 14:18:27 +01:00
Jason Tedor 8b4a92fbb7 Adjust assertions for sequence numbers BWC tests
This commit adjusts the assertions for the sequence number BWC tests to
account for the fact that sometimes these tests are run in
mixed-clusters with 5.6 nodes (that do not understand sequence numbers),
and sometimes these tests are run in mixed-cluster with 6.0+ nodes (that
all understood sequence numbers).

Relates #27251
2017-11-03 08:58:05 -04:00
Nhat bf4c3642b2 remove _primary and _replica shard preferences (#26791)
The shard preference _primary, _replica and its variants were useful
for the asynchronous replication. However, with the current impl, they
are no longer useful and should be removed.

Closes #26335
2017-10-08 11:03:06 -04:00
Boaz Leskes 2a04118e88 Promote common rest test utility methods to ESRestTestCase
We have duplicates in some classes and I was about to create one more.
2017-10-05 10:08:10 +02:00
Jason Tedor f35d1de502 Introduce global checkpoint background sync
It is the exciting return of the global checkpoint background
sync. Long, long ago, in snapshot version far, far away we had and only
had a global checkpoint background sync. This sync would fire
periodically and send the global checkpoint from the primary shard to
the replicas so that they could update their local knowledge of the
global checkpoint. Later in time, as we sped ahead towards finalizing
the initial version of sequence IDs, we realized that we need the global
checkpoint updates to be inline. This means that on a replication
operation, the primary shard would piggy back the global checkpoint with
the replication operation to the replicas. The replicas would update
their local knowledge of the global checkpoint and reply with their
local checkpoint. However, this could allow the global checkpoint on the
primary to advance again and the replicas would fall behind in their
local knowledge of the global checkpoint. If another replication
operation never fired, then the replicas would be permanently behind. To
account for this, we added one more sync that would fire when the
primary shard fell idle. However, this has problems:
 - the shard idle timer defaults to five minutes, a long time to wait
   for the replicas to learn of the new global checkpoint
 - if a replica missed the sync, there was no follow-up sync to catch
   them up
 - there is an inherent race condition where the primary shard could
   fall idle mid-operation (after having sent the replication request to
   the replicas); in this case, there would never be a background sync
   after the operation completes
 - tying the global checkpoint sync to the idle timer was never natural

To fix this, we add two additional changes for the global checkpoint to
be synced to the replicas. The first is that we add a post-operation
sync that only fires if there are no operations in flight and there is a
lagging replica. This gives us a chance to sync the global checkpoint to
the replicas immediately after an operation so that they are always kept
up to date. The second is that we add back a global checkpoint
background sync that fires on a timer. This timer fires every thirty
seconds, and is not configurable (for simplicity). This background sync
is smarter than what we had previously in the sense that it only sends a
sync if the global checkpoint on at least one replica is lagging that of
the primary. When the timer fires, we can compare the global checkpoint
on the primary to its knowledge of the global checkpoint on the replicas
and only send a sync if there is a shard behind.

Relates #26591
2017-09-21 15:34:13 -04:00
Michael Basnight cfd14cd2b8 Revert shading for the low level rest client (#26367)
At current, we do not feel there is enough of a reason to shade the low
level rest client. It caused problems with commons logging and IDE's
during the brief time it was used. We did not know exactly how many
users will need this, and decided that leaving shading out until we
gather more information is best. Users can still shade the jar
themselves. For information and feeback, see issue #26366.

Closes #26328

This reverts commit 3a20922046.
This reverts commit 2c271f0f22.
This reverts commit 9d10dbea39.
This reverts commit e816ef89a2.
2017-08-25 14:13:12 -05:00
Luca Cavanna 6d8e2c6d4c Make RestHighLevelClient Closeable and simplify its creation (#26180)
By making RestHighLevelClient Closeable, its close method will close the internal low-level REST client instance by default, which simplifies the way most users interact with the high-level client.

Its constructor accepts now a RestClientBuilder, which clarifies that the low-level REST client is internally created and managed.

It is still possible to provide an already built `RestClient` instance, but that can only be done by subclassing `RestHighLevelClient` and calling the protected constructor that accepts a `RestClient`. In such case a consumer has also to be provided, which controls what has to be done when the high-level client gets done.

Closes #26086
2017-08-24 09:39:41 +02:00