tcp (Sink)

A Stream App application can be configured to publish events via the TCP transport by adding the type='tcp' annotation at the top of an event stream definition.

Syntax

CREATE SINK <NAME> WITH (type="tcp", map.type="<STRING>", url="<STRING>", sync="<STRING>", tcp.no.delay="<BOOL>", keep.alive="<BOOL>", worker.threads="<INT|LONG>")

Query Parameters

Name	Description	Default Value	Possible Data Types	Optional	Dynamic
url	The URL to which outgoing events should be published via TCP. The URL should adhere to tcp://<host>:<port>/<context> format.		STRING	No	No
sync	This parameter defines whether the events should be published in a synchronized manner or not. If sync = true, then the worker will wait for the ack after sending the message. Else it will not wait for an ack.	false	STRING	Yes	Yes
tcp.no.delay	This is to specify whether to disable Nagle algorithm during message passing. If tcp.no.delay = true, the execution of Nagle algorithm will be disabled in the underlying TCP logic. Hence there will be no delay between two successive writes to the TCP connection. Else there can be a constant ack delay.	true	BOOL	Yes	No
keep.alive	This property defines whether the server should be kept alive when there are no connections available.	true	BOOL	Yes	No
worker.threads	Number of threads to publish events.	10	INT LONG	Yes	No

Example 1

CREATE SINK Foo WITH (type = 'tcp', url='tcp://localhost:8080/abc', sync='true' map.type='binary') (attribute1 string, attribute2 int);

A sink of type tcp has been defined. All events arriving at Foo stream via TCP transport will be sent to the url tcp://localhost:8080/abc in a synchronous manner.