docs/_docs/flink/flink-streamer.adoc

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= Apache Flink Streamer

Apache Ignite Flink Sink module is a streaming connector to inject Flink data into Ignite cache. The sink emits its input
data to Ignite cache. When creating a sink, an Ignite cache name and Ignite grid configuration file have to be provided.

Starting data transfer to Ignite cache can be done with the following steps.

. Import Ignite Flink Sink Module in Maven Project
If you are using Maven to manage dependencies of your project, you can add Flink module
dependency like this (replace `${ignite-flink-ext.version}` with actual Ignite Flink Extension version you are
interested in):
+
[tabs]
--
tab:pom.xml[]
[source,xml]
----
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                        http://maven.apache.org/xsd/maven-4.0.0.xsd">
    ...
    <dependencies>
        ...
        <dependency>
            <groupId>org.apache.ignite</groupId>
            <artifactId>ignite-flink-ext</artifactId>
            <version>${ignite-flink-ext.version}</version>
        </dependency>
        ...
    </dependencies>
    ...
</project>
----
--
. Create an Ignite configuration file and make sure it is accessible from the sink.
. Make sure your data input to the sink is specified and start the sink.
+
[tabs]
--
tab:Java[]
[source,java]
----
IgniteSink igniteSink = new IgniteSink("myCache", "ignite.xml");

igniteSink.setAllowOverwrite(true);
igniteSink.setAutoFlushFrequency(10);
igniteSink.start();

DataStream<Map> stream = ...;

// Sink data into the grid.
stream.addSink(igniteSink);
try {
    env.execute();
} catch (Exception e){
    // Exception handling.
}
finally {
    igniteSink.stop();
----
--

Refer to the Javadocs of the `ignite-flink` module for more info on the available options.