io.debezium.transforms.filter

Class Jsr223Engine

java.lang.Object

io.debezium.transforms.filter.Jsr223Engine

All Implemented Interfaces:

Engine

Direct Known Subclasses:

GraalJsEngine

public class Jsr223Engine
extends Object
implements Engine

An implementation of the expression language evaluator based on JSR 223 scripting languages. The expression receives variables to work with

• key - key of the record
• value - value of the record
• keySchema - schema for key
• valueSchema - schema for value

Author:

Jiri Pechanec

Field Summary

Fields

Modifier and Type	Field and Description
protected ScriptEngine	engine
private String	expression
private CompiledScript	script

Constructor Summary

Constructors

Constructor and Description
Jsr223Engine()

Method Summary

Modifier and Type	Method and Description
void	configure(String language, String expression) Pre-compiles the expression for repeated execution.
protected void	configureEngine()
boolean	eval(org.apache.kafka.connect.connector.ConnectRecord<?> record) Evaluates whether the record matches the predicate expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

expression

private String expression

script

private CompiledScript script

engine

protected ScriptEngine engine

Constructor Detail

Jsr223Engine

public Jsr223Engine()

Method Detail

configure

public void configure(String language,
                      String expression)

Description copied from interface: Engine

Pre-compiles the expression for repeated execution. The method is called once upon the engine initialization.

Specified by:

configure in interface Engine

configureEngine

protected void configureEngine()

eval

public boolean eval(org.apache.kafka.connect.connector.ConnectRecord<?> record)

Description copied from interface: Engine

Evaluates whether the record matches the predicate expression.

Specified by:

eval in interface Engine

Parameters:

record - to be evaluated

Returns:

true if the input argument matches the predicate expression, otherwise false