IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« Scripting and security Painless Scripting Language »

› › ›

Groovy Scripting Language

edit

Groovy Scripting Language

edit

Deprecated in 5.0.0.

Groovy will be replaced by the new scripting language Painless

Groovy is available in Elasticsearch by default. Although limited by the Java Security Manager, it is not a sandboxed language and only file scripts may be used by default.

Enabling inline or stored Groovy scripting is a security risk and should only be considered if your Elasticsearch cluster is protected from the outside world. Even a simple while (true) { } loop could behave as a denial-of- service attack on your cluster.

See Scripting and Security for details on security issues with scripts, including how to customize class whitelisting.

Doc value properties and methods

edit

Doc values in Groovy support the following properties and methods (depending on the underlying field type):

doc['field_name'].value: The native value of the field. For example, if its a short type, it will be short.
doc['field_name'].values: The native array values of the field. For example, if its a short type, it will be short[]. Remember, a field can have several values within a single doc. Returns an empty array if the field has no values.
doc['field_name'].empty: A boolean indicating if the field has no values within the doc.
doc['field_name'].lat: The latitude of a geo point type, or null.
doc['field_name'].lon: The longitude of a geo point type, or null.
doc['field_name'].lats: The latitudes of a geo point type, or an empty array.
doc['field_name'].lons: The longitudes of a geo point type, or an empty array.
doc['field_name'].arcDistance(lat, lon): The arc distance (in meters) of this geo point field from the provided lat/lon.
doc['field_name'].arcDistanceWithDefault(lat, lon, default): The arc distance (in meters) of this geo point field from the provided lat/lon with a default value for empty fields.
doc['field_name'].planeDistance(lat, lon): The plane distance (in meters) of this geo point field from the provided lat/lon.
doc['field_name'].planeDistanceWithDefault(lat, lon, default): The plane distance (in meters) of this geo point field from the provided lat/lon with a default value for empty fields.
doc['field_name'].geohashDistance(geohash): The arc distance (in meters) of this geo point field from the provided geohash.
doc['field_name'].geohashDistanceWithDefault(geohash, default): The arc distance (in meters) of this geo point field from the provided geohash with a default value for empty fields.

Groovy Built In Functions

edit

There are several built in functions that can be used within scripts. They include:

Function	Description
`sin(a)`	Returns the trigonometric sine of an angle.
`cos(a)`	Returns the trigonometric cosine of an angle.
`tan(a)`	Returns the trigonometric tangent of an angle.
`asin(a)`	Returns the arc sine of a value.
`acos(a)`	Returns the arc cosine of a value.
`atan(a)`	Returns the arc tangent of a value.
`toRadians(angdeg)`	Converts an angle measured in degrees to an approximately equivalent angle measured in radians
`toDegrees(angrad)`	Converts an angle measured in radians to an approximately equivalent angle measured in degrees.
`exp(a)`	Returns Euler’s number e raised to the power of value.
`log(a)`	Returns the natural logarithm (base e) of a value.
`log10(a)`	Returns the base 10 logarithm of a value.
`sqrt(a)`	Returns the correctly rounded positive square root of a value.
`cbrt(a)`	Returns the cube root of a double value.
`IEEEremainder(f1, f2)`	Computes the remainder operation on two arguments as prescribed by the IEEE 754 standard.
`ceil(a)`	Returns the smallest (closest to negative infinity) value that is greater than or equal to the argument and is equal to a mathematical integer.
`floor(a)`	Returns the largest (closest to positive infinity) value that is less than or equal to the argument and is equal to a mathematical integer.
`rint(a)`	Returns the value that is closest in value to the argument and is equal to a mathematical integer.
`atan2(y, x)`	Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r,theta).
`pow(a, b)`	Returns the value of the first argument raised to the power of the second argument.
`round(a)`	Returns the closest int to the argument.
`random()`	Returns a random double value.
`abs(a)`	Returns the absolute value of a value.
`max(a, b)`	Returns the greater of two values.
`min(a, b)`	Returns the smaller of two values.
`ulp(d)`	Returns the size of an ulp of the argument.
`signum(d)`	Returns the signum function of the argument.
`sinh(x)`	Returns the hyperbolic sine of a value.
`cosh(x)`	Returns the hyperbolic cosine of a value.
`tanh(x)`	Returns the hyperbolic tangent of a value.
`hypot(x, y)`	Returns sqrt(x2 + y2) without intermediate overflow or underflow.

« Scripting and security Painless Scripting Language »