ZMQ PULL Source

Receive messages on ZMQ PULL socket and source stream.

This block will connect to a ZMQ PUSH socket, then produce all incoming messages as streaming output.

Parameters

(R): Run-time adjustable

Address

ZMQ socket address specifier. The format of the address is tcp://*:port where * should be 127.0.0.1 for localhost.

Note: If the Source and Sink blocks are on two different computers on the same LAN, then the IP and port number of the Sink block must be specified on each end of that connection. For example, if the Sink is on IP 192.168.2.14:5678 and the Source is on IP 192.168.2.5, both Source and Sink blocks must specify the Sink IP and port (192.168.2.14:5678).

Timeout

Receive timeout in milliseconds, default is 100ms.

Pass Tags

Whether sink will serialize and pass tags over the link.

High Watermark

High Watermark is the hard limit on the maximum number of outstanding messages that ZMQ will queue in the memory. The default value is set to -1. If there is to be no limit on the number of messages, set this value to zero.

Note: ZMQ does not guarantee that the socket will be able to queue as many messages as specified, and the actual limit may be lower or higher, depending on socket transport.

Example Flowgraph

Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.

Source Files

C++ files

pull_source_impl.cc

Header files

pull_source_impl.h

Public header files

pull_source.h

Block definition

zeromq_pull_source.block.yml