Invoke methods on Java object references. These functions provide a mechanism for invoking various Java object methods directly from R.

invoke(jobj, method, ...)

invoke_static(sc, class, method, ...)

invoke_new(sc, class, ...)

Arguments

jobj
An R object acting as a Java object reference (typically, a spark_jobj).
method
The name of the method to be invoked.
...
Optional arguments, currently unused.
sc
A spark_connection.
class
The name of the Java class whose methods should be invoked.

Details

Use each of these functions in the following scenarios:

invoke Execute a method on a Java object reference (typically, a spark_jobj).
invoke_static Execute a static method associated with a Java class.
invoke_new Invoke a constructor associated with a Java class.

Examples

sc <- spark_connect(master = "spark://HOST:PORT")
spark_context(sc) %>%
  invoke("textFile", "file.csv", 1L) %>%
    invoke("count")