Nik Everett 972c56dafe Begin migrating SQL's next page (elastic/x-pack-elasticsearch#2271)
Scrolling was only implemented for the `SqlAction` (not jdbc or cli)
and it was implemented by keeping request state on the server. On
principle we try to avoid adding extra state to elasticsearch where
possible because it creates extra points of failure and tends to
have lots of hidden complexity.

This replaces the state on the server with serializing state to the
client. This looks to the user like a "next_page" key with fairly
opaque content. It actually consists of an identifier for the *kind*
of scroll, the scroll id, and a base64 string containing the field
extractors.

Right now this only implements scrolling for `SqlAction`. The plan
is to reuse the same implementation for jdbc and cli in a followup.

This also doesn't implement all of the required serialization.
Specifically it doesn't implement serialization of
`ProcessingHitExtractor` because I haven't implemented serialization
for *any* `ColumnProcessors`.

Original commit: elastic/x-pack-elasticsearch@a8567bc5ec
2017-08-28 08:46:49 -04:00
2017-03-19 16:37:21 -04:00
2017-02-10 11:02:42 -08:00
2015-10-30 11:16:29 -06:00
2015-11-25 10:39:08 -05:00
2018-04-20 14:16:58 -07:00
2017-06-26 11:37:08 -04:00

= Elasticsearch X-Pack

A set of Elastic's commercial plugins for Elasticsearch:

- License
- Security
- Watcher
- Monitoring
- Machine Learning
- Graph

= Setup

You must checkout `x-pack-elasticsearch` and `elasticsearch` with a specific directory structure. The
`elasticsearch` checkout will be used when building `x-pack-elasticsearch`. The structure is:

- /path/to/elastic/elasticsearch
- /path/to/elastic/elasticsearch-extra/x-pack-elasticsearch

== Vault Secret

The build requires a Vault Secret ID. You can use a GitHub token by following these steps:

1. Go to https://github.com/settings/tokens
2. Click *Generate new token*
3. Set permissions to `read:org`
4. Copy the token into `~/.elastic/github.token`
5. Set the token's file permissions to `600`

```
$ mkdir ~/.elastic
$ vi ~/.elastic/github.token
# Add your_token exactly as it is into the file and save it
$ chmod 600 ~/.elastic/github.token
```

If you do not create the token, then you will see something along the lines of this as the failure when trying to build X-Pack:

```
* What went wrong:
Missing ~/.elastic/github.token file or VAULT_SECRET_ID environment variable, needed to authenticate with vault for secrets
```

=== Offline Mode

When running the build in offline mode (`--offline`), it will not required to have the vault secret setup.

== Native Code

**This is mandatory as tests depend on it**

Machine Learning requires platform specific binaries, build from https://github.com/elastic/machine-learning-cpp via CI servers.

The native artifacts are stored in S3. To retrieve them infra's team Vault service is utilized, which 
requires a github token. Please setup a github token as documented: 

https://github.com/elastic/infra/blob/master/docs/vault.md#github-auth

The github token has to be put into ~/.elastic/github.token, while the file rights must be set to 0600. 

= Build

- Run unit tests:
+
[source, txt]
-----
gradle clean test
-----

- Run all tests:
+
[source, txt]
-----
gradle clean check
-----

- Run integration tests:
+
[source, txt]
-----
gradle clean integTest
-----

- Package X-Pack (without running tests)
+
[source, txt]
-----
gradle clean assemble
-----

- Install X-Pack (without running tests)
+
[source, txt]
-----
gradle clean install
-----

= Building documentation

The source files in this repository can be included in either the X-Pack Reference or the Elasticsearch Reference. 

NOTE: In 5.5 and later, the Elasticsearch Reference includes X-Pack-specific content when it is built from this repo.

To build the Elasticsearch Reference on your local machine:

* Use the `index.asciidoc` file in the docs/en directory.
* Specify the location of the `elasticsearch/docs` directory with the `--resource` option when you run `build_docs.pl`.

For example:

[source, txt]
-----
./docs/build_docs.pl --doc elasticsearch-extra/x-pack-elasticsearch/docs/en/index.asciidoc 
--resource=elasticsearch/docs --chunk 1
-----

For information about building the X-Pack Reference, see the README in the x-pack repo.

To build a release notes page for the pull requests in this repository:

* Use the dev-tools/xes-release-notes.pl script to pull PRs from the x-pack-elasticsearch repo.  Alternatively, use the dev-tools/xescpp_release_notes.pl script to pull PRs from both the x-pack-elasticsearch and machine-learning-cpp repos.
* Specify the version label for which you want the release notes.
* Redirect the output to a new local file.

NOTE: You must have a personal access token called ~/.github_auth with "repo" scope. Use steps similar to "Vault Secret" to create this file. 

For example:
[source, txt]
-----
./dev-tools/xes_release_notes.pl v5.5.2 > ~/tmp/5.5.2.asciidoc
-----

== Adding Images

When you include an image in the documentation, specify the path relative to the location of the asciidoc file. By convention, we put images in an `images` subdirectory.

For example to insert `watcher-ui-edit-watch.png` in `watcher/limitations.asciidoc`:

. Add an `images` subdirectory to the watcher directory if it doesn't already exist. 
. In `limitations.asciidoc` specify:
+
[source, txt]
-----
 image::images/watcher-ui-edit-watch.png["Editing a watch"]
-----
 
Please note that image names and anchor IDs must be unique within the book, so do not use generic identifiers.
Description
🔎 Open source distributed and RESTful search engine.
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