Available as of Camel 2.18
This documentation page covers the https://flink.apache.org component for the Apache Camel.
The camel-flink component provides a bridge between Camel connectors and Flink tasks. This Camel Flink connector provides a way to route message from various
transports, dynamically choosing a flink task to execute, use incoming message as input data for the task and finally deliver the results back to the Camel pipeline.
Maven users will need to add the following dependency to their pom.xml
for this component:
<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-flink</artifactId> <version>x.x.x</version> <!-- use the same version as your Camel core version --> </dependency> |
Currently, the Flink Component supports only Producers. One can create DataSet, DataStream jobs.
flink:dataset?dataset=#myDataSet&dataSetCallback=#dataSetCallback flink:datastream?datastream=#myDataStream&dataStreamCallback=#dataStreamCallback |
You can append query options to the URI in the following format, ?option=value&option=value&...
|
|
Flink DataSet Callback
@Bean public DataSetCallback<Long> dataSetCallback() { return new DataSetCallback<Long>() { public Long onDataSet(DataSet dataSet, Object... objects) { try { dataSet.print(); return new Long(0); } catch (Exception e) { return new Long(-1); } } }; } |
Flink DataStream Callback
@Bean public VoidDataStreamCallback dataStreamCallback() { return new VoidDataStreamCallback() { @Override public void doOnDataStream(DataStream dataStream, Object... objects) throws Exception { dataStream.flatMap(new Splitter()).print(); environment.execute("data stream test"); } }; } |
Flink Producer
CamelContext camelContext = new SpringCamelContext(context); String pattern = "foo"; try { ProducerTemplate template = camelContext.createProducerTemplate(); camelContext.start(); Long count = template.requestBody("flink:dataSet?dataSet=#myDataSet&dataSetCallback=#countLinesContaining", pattern, Long.class); } finally { camelContext.stop(); } |