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Cross Language APIs

APIs for calling Java functions and actors from Python.

Java Functions

ray.cross_language.java_function()

Define a Java function to call from Python.

java_func = ray.cross_language.java_function(
    class_name="com.example.MyClass",
    function_name="myMethod"
)

result = java_func.remote(arg1, arg2)

Parameters:

  • class_name: Fully qualified Java class name
  • function_name: Java method name

Returns: Remote function that can be called with .remote()

Java Actors

ray.cross_language.java_actor_class()

Define a Java actor class to use from Python.

JavaActor = ray.cross_language.java_actor_class(
    class_name="com.example.MyActor"
)

actor = JavaActor.remote(arg1, arg2)
result = actor.method.remote()

Parameters:

  • class_name: Fully qualified Java actor class name

Returns: Actor class that can be instantiated with .remote()

Note: Requires Java code to be available in the code search path specified in JobConfig.