Receiving JSON Events via TCP¶
Purpose:¶
This application demonstrates how to configure WSO2 Streaming Integrator Tooling to receive events to the SweetProductionStream via TCP transport in JSON format using default mapping and log the events in LowProductionAlertStream to the output console.
Prerequisites:¶
Save this sample.
Executing the Sample:¶
- Start the Siddhi application by clicking on 'Run'.
- If the Siddhi application starts successfully, the following messages would be shown on the console.
Testing the Sample:¶
Navigate to {WSO2SIHome}/samples/sample-clients/tcp-client
and run ant
command as follows:
ant
command as follows.
Notes:¶
If the message Tcp Server started in 0.0.0.0:9892
does not appear,it could be due to port 9892, defined in the Siddhi application is already being used by a different program. To resolve this issue, please do the following,
* Stop this Siddhi application (Click 'Run' on menu bar -> 'Stop').
* Change the port 9892 to an unused port, in this Siddhi application's source configuration.
* Start the application and check whether the specified messages appear on the console.
Viewing the Results:¶
See the output. Following messages would be shown on the console.
INFO {io.siddhi.core.stream.output.sink.LogSink} - ReceiveTCPinJSONFormat : LowProductionAlertStream : Event{timestamp=1513049050858, data=[Gingerbread, 6664.0], isExpired=false}
INFO {io.siddhi.core.stream.output.sink.LogSink} - ReceiveTCPinJSONFormat : LowProductionAlertStream : Event{timestamp=1513049051858, data=[Cream Sandwich, 6190.0], isExpired=false}
INFO {io.siddhi.core.stream.output.sink.LogSink} - ReceiveTCPinJSONFormat : LowProductionAlertStream : Event{timestamp=1513049052859, data=[Gingerbread, 9725.0], isExpired=false}
INFO {io.siddhi.core.stream.output.sink.LogSink} - ReceiveTCPinJSONFormat : LowProductionAlertStream : Event{timestamp=1513049053859, data=[Donut, 7777.0], isExpired=false}
INFO {io.siddhi.core.stream.output.sink.LogSink} - ReceiveTCPinJSONFormat : LowProductionAlertStream : Event{timestamp=1513049054860, data=[Honeycomb, 8818.0], isExpired=false}
@App:name("ReceiveTCPinJSONFormat")
@App:description('Receive events via TCP transport in JSON format with default mapping and view the output on the console.')
@Source(type = 'tcp',
context='SweetProductionStream',
@map(type='json'))
define stream SweetProductionStream (name string, amount double);
@sink(type='log')
define stream LowProductionAlertStream (name string, amount double);
-- passthrough data in the SweetProductionStream into LowProducitonAlertStream
@info(name='query1')
from SweetProductionStream
select *
insert into LowProductionAlertStream;