org.apache.pulsar.functions.api.examples.PublishFunction Maven / Gradle / Ivy
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.pulsar.functions.api.examples;
import org.apache.pulsar.client.api.PulsarClientException;
import org.apache.pulsar.client.api.Schema;
import org.apache.pulsar.functions.api.Context;
import org.apache.pulsar.functions.api.Function;
/**
* Example function that uses the built in publish function in the context
* to publish to a desired topic based on config.
*/
public class PublishFunction implements Function {
@Override
public Void process(String input, Context context) {
String publishTopic = (String) context.getUserConfigValueOrDefault("publish-topic", "publishtopic");
String output = String.format("%s!", input);
try {
context.newOutputMessage(publishTopic, Schema.STRING).value(output).sendAsync();
} catch (PulsarClientException e) {
context.getLogger().error(e.toString());
}
return null;
}
}