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io.camunda.connector.kafka.inbound.KafkaExecutable Maven / Gradle / Ivy
/*
* Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
* under one or more contributor license agreements. Licensed under a proprietary license.
* See the License.txt file for more information. You may not use this file
* except in compliance with the proprietary license.
*/
package io.camunda.connector.kafka.inbound;
import dev.failsafe.RetryPolicy;
import io.camunda.connector.api.annotation.InboundConnector;
import io.camunda.connector.api.inbound.Activity;
import io.camunda.connector.api.inbound.Health;
import io.camunda.connector.api.inbound.InboundConnectorContext;
import io.camunda.connector.api.inbound.InboundConnectorExecutable;
import io.camunda.connector.api.inbound.Severity;
import io.camunda.connector.generator.dsl.BpmnType;
import io.camunda.connector.generator.java.annotation.ElementTemplate;
import java.time.Duration;
import java.util.Properties;
import java.util.function.Function;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@InboundConnector(name = "Kafka Consumer", type = "io.camunda:connector-kafka-inbound:1")
@ElementTemplate(
id = "io.camunda.connectors.webhook",
name = "Kafka Event Connector",
icon = "icon.svg",
version = 5,
inputDataClass = KafkaConnectorProperties.class,
description = "Consume Kafka messages",
documentationRef =
"https://docs.camunda.io/docs/components/connectors/out-of-the-box-connectors/kafka/?kafka=inbound",
propertyGroups = {
@ElementTemplate.PropertyGroup(id = "authentication", label = "Authentication"),
@ElementTemplate.PropertyGroup(id = "kafka", label = "Kafka"),
@ElementTemplate.PropertyGroup(id = "message", label = "Message deserialization"),
},
elementTypes = {
@ElementTemplate.ConnectorElementType(
appliesTo = BpmnType.START_EVENT,
elementType = BpmnType.START_EVENT,
templateIdOverride = "io.camunda.connectors.inbound.KAFKA.v1",
templateNameOverride = "Kafka Start Event Connector"),
@ElementTemplate.ConnectorElementType(
appliesTo = BpmnType.START_EVENT,
elementType = BpmnType.MESSAGE_START_EVENT,
templateIdOverride = "io.camunda.connectors.inbound.KafkaMessageStart.v1",
templateNameOverride = "Kafka Message Start Event Connector"),
@ElementTemplate.ConnectorElementType(
appliesTo = {BpmnType.INTERMEDIATE_THROW_EVENT, BpmnType.INTERMEDIATE_CATCH_EVENT},
elementType = BpmnType.INTERMEDIATE_CATCH_EVENT,
templateIdOverride = "io.camunda.connectors.inbound.KafkaIntermediate.v1",
templateNameOverride = "Kafka Intermediate Catch Event Connector"),
@ElementTemplate.ConnectorElementType(
appliesTo = BpmnType.BOUNDARY_EVENT,
elementType = BpmnType.BOUNDARY_EVENT,
templateIdOverride = "io.camunda.connectors.inbound.KafkaBoundary.v1",
templateNameOverride = "Kafka Boundary Event Connector")
})
public class KafkaExecutable implements InboundConnectorExecutable {
private static final Logger LOG = LoggerFactory.getLogger(KafkaExecutable.class);
private final Function> consumerCreatorFunction;
public KafkaConnectorConsumer kafkaConnectorConsumer;
private final RetryPolicy retryPolicy;
public KafkaExecutable(
final Function> consumerCreatorFunction,
final RetryPolicy retryConfig) {
this.consumerCreatorFunction = consumerCreatorFunction;
this.retryPolicy = retryConfig;
}
private static final int INFINITE_RETRIES = -1;
public KafkaExecutable() {
this(
KafkaConsumer::new,
RetryPolicy.builder()
.handle(Exception.class)
.withDelay(Duration.ofSeconds(30))
.withMaxAttempts(INFINITE_RETRIES)
.build());
}
@Override
public void activate(InboundConnectorContext context) {
try {
LOG.info("Subscription activation requested by the Connector runtime");
context.log(
Activity.level(Severity.INFO)
.tag("Subscription activation")
.message("Subscription activation requested by the Connector runtime"));
KafkaConnectorProperties elementProps =
context.bindProperties(KafkaConnectorProperties.class);
this.kafkaConnectorConsumer =
new KafkaConnectorConsumer(consumerCreatorFunction, context, elementProps, retryPolicy);
this.kafkaConnectorConsumer.startConsumer();
context.log(
Activity.level(Severity.INFO)
.tag("Subscription activation")
.message("Subscription activated successfully"));
} catch (Exception ex) {
context.log(
Activity.level(Severity.ERROR)
.tag("Subscription activation")
.message("Subscription activation failed: " + ex.getMessage()));
context.reportHealth(Health.down(ex));
LOG.warn("Subscription activation failed: ", ex);
throw ex;
}
}
@Override
public void deactivate() {
LOG.info("Subscription deactivation requested by the Connector runtime");
try {
this.kafkaConnectorConsumer.stopConsumer();
} catch (Exception e) {
LOG.error("Failed to cancel Connector execution: {}", e.getMessage());
}
}
}
