org.apache.beam.sdk.transforms

Annotation Type DoFn.StartBundle

@Documented
 @Retention(value=RUNTIME)
 @Target(value=METHOD)
public static @interface DoFn.StartBundle

Annotation for the method to use to prepare an instance for processing a batch of elements. The method annotated with this must satisfy the following constraints:

• It must have exactly zero or one arguments.
• If it has any arguments, its only argument must be a DoFn.StartBundleContext.