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aba4422606
* Initial changes for scripting. * Shorten script examples. * Expanding types docs. * Updating types. * Fixing broken cross-link. * Fixing map error. * Incorporating review feedback. * Fixing broken table. * Adding more info about reference types. * Fixing broken path. * Adding more info an examples for def type. * Adding more info on operators. * Incorporating review feedback. * Adding notconsole for example. * Removing comments in example. * More review feedback. * Editorial changes. * Incorporating more reviewer feedback. * Rewrites based on review feedback. * Adding new sections for storing scripts and shortening scripts. * Adding redirect for stored scripts. * Adding DELETE for stored script plus link. * Adding section for updating docs with scripts. * Incorporating final feedback from reviews. * Tightening up a few areas. * Minor change around other languages. Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
34 lines
1.5 KiB
Text
34 lines
1.5 KiB
Text
[[modules-scripting-painless]]
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== Painless scripting language
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_Painless_ is a performant, secure scripting language designed specifically for
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{es}. You can use Painless to safely write inline and stored scripts anywhere
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scripts are supported in {es}.
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[[painless-features]]
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Painless provides numerous capabilities that center around the following
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core principles:
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* **Safety**: Ensuring the security of your cluster is of utmost importance. To
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that end, Painless uses a fine-grained allowlist with a granularity down to the
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members of a class. Anything that is not part of the allowlist results in a
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compilation error. See the
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{painless}/painless-api-reference.html[Painless API Reference]
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for a complete list of available classes, methods, and fields per script
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context.
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* **Performance**: Painless compiles directly into JVM bytecode to take
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advantage of all possible optimizations that the JVM provides. Also, Painless
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typically avoids features that require additional slower checks at runtime.
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* **Simplicity**: Painless implements a syntax with a natural familiarity to
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anyone with some basic coding experience. Painless uses a subset of Java syntax
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with some additional improvements to enhance readability and remove
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boilerplate.
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[discrete]
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=== Start scripting
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Ready to start scripting with Painless? Learn how to
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<<modules-scripting-using,write your first script>>.
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If you're already familiar with Painless, see the
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{painless}/painless-lang-spec.html[Painless Language Specification] for a
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detailed description of the Painless syntax and language features.
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