[APEXCORE-579] Custom control tuple support

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.6.0
• Assignee: Bhupesh Chawda
• Reporter: David Yan
• Created: 28/Nov/16 22:36
• Updated: 05/May/17 10:46
• Resolved: 03/Mar/17 10:36

Description

The discussion thread is here:

https://lists.apache.org/thread.html/9accc404a3cb17af2de73b860ed7dff4523a837b4d3c1c73fe0858c5@%3Cdev.apex.apache.org%3E

We will implement option 1 for now and park option 2 until we have a real use case.

We probably need a LinkedHashMap to store all the control tuples received in memory (to preserve the order and uniqueness).

The assumption is that we will not have a large number of control tuples within a streaming window and the memory footprint of control tuples is small.

Sub-Tasks

• Interface for processing and emitting control tuples: Closed
• Delivery of Custom Control Tuples: Closed
• Documentation for Control tuple support changes: Closed