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a4060f7436
This removes all the mentions of the sandbox from the script engine services and permissions model. This means that the following settings are no longer supported: ```yaml script.inline: sandbox script.stored: sandbox ``` Instead, only a `true` or `false` value can be specified. Since this would otherwise break the default-allow parameter for languages like expressions, painless, and mustache, all script engines have been updated to have individual settings, for instance: ```yaml script.engine.groovy.inline: true ``` Would enable all inline scripts for groovy. (they can still be overridden on a per-operation basis). Expressions, Painless, and Mustache all default to `true` for inline, file, and stored scripts to preserve the old scripting behavior. Resolves #17114
179 lines
6.6 KiB
Plaintext
179 lines
6.6 KiB
Plaintext
[[modules-scripting-groovy]]
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=== Groovy Scripting Language
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Groovy is the default scripting language available in Elasticsearch. Although
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limited by the <<java-security-manager,Java Security Manager>>, only `file`
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scripts may be used by default.
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Enabling `inline` or `stored` Groovy scripting is a security risk and should
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only be considered if your Elasticsearch cluster is protected from the outside
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world. Even a simple `while (true) { }` loop could behave as a denial-of-
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service attack on your cluster.
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See <<modules-scripting-security, Scripting and Security>> for details
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on security issues with scripts, including how to customize class
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whitelisting.
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[float]
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=== Doc value properties and methods
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Doc values in Groovy support the following properties and methods (depending
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on the underlying field type):
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`doc['field_name'].value`::
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The native value of the field. For example, if its a short type, it will be short.
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`doc['field_name'].values`::
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The native array values of the field. For example, if its a short type,
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it will be short[]. Remember, a field can have several values within a
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single doc. Returns an empty array if the field has no values.
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`doc['field_name'].empty`::
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A boolean indicating if the field has no values within the doc.
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`doc['field_name'].lat`::
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The latitude of a geo point type, or `null`.
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`doc['field_name'].lon`::
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The longitude of a geo point type, or `null`.
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`doc['field_name'].lats`::
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The latitudes of a geo point type, or an empty array.
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`doc['field_name'].lons`::
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The longitudes of a geo point type, or an empty array.
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`doc['field_name'].distance(lat, lon)`::
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The `plane` distance (in meters) of this geo point field from the provided lat/lon.
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`doc['field_name'].distanceWithDefault(lat, lon, default)`::
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The `plane` distance (in meters) of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].distanceInMiles(lat, lon)`::
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The `plane` distance (in miles) of this geo point field from the provided lat/lon.
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`doc['field_name'].distanceInMilesWithDefault(lat, lon, default)`::
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The `plane` distance (in miles) of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].distanceInKm(lat, lon)`::
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The `plane` distance (in km) of this geo point field from the provided lat/lon.
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`doc['field_name'].distanceInKmWithDefault(lat, lon, default)`::
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The `plane` distance (in km) of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].arcDistance(lat, lon)`::
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The `arc` distance (in meters) of this geo point field from the provided lat/lon.
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`doc['field_name'].arcDistanceWithDefault(lat, lon, default)`::
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The `arc` distance (in meters) of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].arcDistanceInMiles(lat, lon)`::
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The `arc` distance (in miles) of this geo point field from the provided lat/lon.
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`doc['field_name'].arcDistanceInMilesWithDefault(lat, lon, default)`::
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The `arc` distance (in miles) of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].arcDistanceInKm(lat, lon)`::
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The `arc` distance (in km) of this geo point field from the provided lat/lon.
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`doc['field_name'].arcDistanceInKmWithDefault(lat, lon, default)`::
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The `arc` distance (in km) of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].factorDistance(lat, lon)`::
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The distance factor of this geo point field from the provided lat/lon.
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`doc['field_name'].factorDistance(lat, lon, default)`::
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The distance factor of this geo point field from the provided lat/lon with a default value.
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`doc['field_name'].geohashDistance(geohash)`::
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The `arc` distance (in meters) of this geo point field from the provided geohash.
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`doc['field_name'].geohashDistanceInKm(geohash)`::
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The `arc` distance (in km) of this geo point field from the provided geohash.
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`doc['field_name'].geohashDistanceInMiles(geohash)`::
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The `arc` distance (in miles) of this geo point field from the provided geohash.
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[float]
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=== Groovy Built In Functions
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There are several built in functions that can be used within scripts.
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They include:
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[cols="<,<",options="header",]
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|=======================================================================
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|Function |Description
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|`sin(a)` |Returns the trigonometric sine of an angle.
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|`cos(a)` |Returns the trigonometric cosine of an angle.
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|`tan(a)` |Returns the trigonometric tangent of an angle.
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|`asin(a)` |Returns the arc sine of a value.
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|`acos(a)` |Returns the arc cosine of a value.
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|`atan(a)` |Returns the arc tangent of a value.
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|`toRadians(angdeg)` |Converts an angle measured in degrees to an
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approximately equivalent angle measured in radians
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|`toDegrees(angrad)` |Converts an angle measured in radians to an
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approximately equivalent angle measured in degrees.
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|`exp(a)` |Returns Euler's number _e_ raised to the power of value.
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|`log(a)` |Returns the natural logarithm (base _e_) of a value.
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|`log10(a)` |Returns the base 10 logarithm of a value.
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|`sqrt(a)` |Returns the correctly rounded positive square root of a
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value.
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|`cbrt(a)` |Returns the cube root of a double value.
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|`IEEEremainder(f1, f2)` |Computes the remainder operation on two
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arguments as prescribed by the IEEE 754 standard.
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|`ceil(a)` |Returns the smallest (closest to negative infinity) value
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that is greater than or equal to the argument and is equal to a
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mathematical integer.
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|`floor(a)` |Returns the largest (closest to positive infinity) value
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that is less than or equal to the argument and is equal to a
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mathematical integer.
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|`rint(a)` |Returns the value that is closest in value to the argument
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and is equal to a mathematical integer.
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|`atan2(y, x)` |Returns the angle _theta_ from the conversion of
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rectangular coordinates (_x_, _y_) to polar coordinates (r,_theta_).
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|`pow(a, b)` |Returns the value of the first argument raised to the
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power of the second argument.
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|`round(a)` |Returns the closest _int_ to the argument.
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|`random()` |Returns a random _double_ value.
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|`abs(a)` |Returns the absolute value of a value.
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|`max(a, b)` |Returns the greater of two values.
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|`min(a, b)` |Returns the smaller of two values.
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|`ulp(d)` |Returns the size of an ulp of the argument.
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|`signum(d)` |Returns the signum function of the argument.
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|`sinh(x)` |Returns the hyperbolic sine of a value.
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|`cosh(x)` |Returns the hyperbolic cosine of a value.
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|`tanh(x)` |Returns the hyperbolic tangent of a value.
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|`hypot(x, y)` |Returns sqrt(_x2_ + _y2_) without intermediate overflow
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or underflow.
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|=======================================================================
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