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KafkaConfig.java
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KafkaConfig.java
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{% macro kafkaConfig(asyncapi, params) %}
{%- set hasSubscribe = false -%}
{%- set hasPublish = false -%}
{%- for channelName, channel in asyncapi.channels() -%}
{%- if channel.hasPublish() -%}
{%- set hasPublish = true -%}
{%- endif -%}
{%- if channel.hasSubscribe() -%}
{%- set hasSubscribe = true -%}
{%- endif -%}
{%- endfor %}
{%- set securityProtocol = "PLAINTEXT" -%}
{%- set saslMechanism = null -%}
{%- set saslJaasConfig = null -%}
{%- for serverName, server in asyncapi.servers() -%}
{%- if server.protocol() == "kafka" -%}
{%- if server.security() -%}
{%- set securityProtocol = "SASL_PLAINTEXT" -%}
{%- else -%}
{%- set securityProtocol = "PLAINTEXT" -%}
{%- endif -%}
{%- elif server.protocol() == "kafka-secure" -%}
{%- if server.security() -%}
{%- set securityProtocol = "SASL_SSL" -%}
{%- else -%}
{%- set securityProtocol = "SSL" -%}
{%- endif -%}
{%- endif -%}
{%- if asyncapi.hasComponents() and asyncapi.components().hasSecuritySchemes() and server.security() -%}
{%- for securityRef in server.security() -%}
{%- for securityName, securityObj in securityRef -%}
{%- for securityRefName, securityRefObj in securityObj -%}
{%- for securitySchemeRef, securityScheme in asyncapi.components().securitySchemes()[securityRefName] -%}
{%- if securityScheme.type == "plain" -%}
{%- set saslMechanism = "PLAIN" -%}
{%- set saslJaasConfig = "org.apache.kafka.common.security.plain.PlainLoginModule required username='USERNAME' password='PASSWORD';" -%}
{%- elif securityScheme.type == "scramSha256" -%}
{%- set saslMechanism = "SCRAM-SHA-256" -%}
{%- set saslJaasConfig = "org.apache.kafka.common.security.scram.ScramLoginModule required username='USERNAME' password='PASSWORD';" -%}
{%- elif securityScheme.type == "scramSha512" -%}
{%- set saslMechanism = "SCRAM-SHA-512" -%}
{%- set saslJaasConfig = "org.apache.kafka.common.security.scram.ScramLoginModule required username='USERNAME' password='PASSWORD';" -%}
{%- elif securityScheme.type == "oauth2" -%}
{%- set saslMechanism = "OAUTHBEARER" -%}
{%- set saslJaasConfig = "org.apache.kafka.common.security.oauthbearer.OAuthBearerLoginModule required unsecuredLoginStringClaim_sub='LOGINSTRING';" -%}
{%- elif securityScheme.type == "gssapi" -%}
{%- set saslMechanism = "GSSAPI" -%}
{%- set saslJaasConfig = "com.sun.security.auth.module.Krb5LoginModule required useKeyTab=true storeKey=true keyTab='CLIENT.KEYTAB' principal='EMAIL@DOMAIN.COM';" -%}
{%- elif securityScheme.type == "X509" -%}
{%- set securityProtocol = "SSL" -%}
{%- endif -%}
{%- endfor -%}
{%- endfor -%}
{%- endfor -%}
{%- endfor -%}
{%- endif -%}
{%- endfor %}
import org.apache.kafka.clients.CommonClientConfigs;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.IntegerDeserializer;
import org.apache.kafka.common.serialization.IntegerSerializer;
import org.apache.kafka.common.config.SaslConfigs;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.config.KafkaListenerContainerFactory;
import org.springframework.kafka.core.*;
import org.springframework.kafka.listener.ConcurrentMessageListenerContainer;
import org.springframework.kafka.support.serializer.JsonDeserializer;
import org.springframework.kafka.support.serializer.JsonSerializer;
import javax.annotation.processing.Generated;
import java.util.HashMap;
import java.util.Map;
@Generated(value="com.asyncapi.generator.template.spring", date="{{''|currentTime }}")
@Configuration
{% if hasPublish %}@EnableKafka{% endif %}
public class Config {
{% if hasSubscribe or hasPublish %}
@Value("${spring.kafka.bootstrap-servers}")
private String bootstrapServers;{% endif %}
{% if hasPublish %}
@Value("${spring.kafka.listener.poll-timeout}")
private long pollTimeout;
@Value("${spring.kafka.listener.concurrency}")
private int concurrency;{% endif %}
{%- if hasSubscribe %}
@Bean
public KafkaTemplate<Integer, Object> kafkaTemplate() {
return new KafkaTemplate<>(producerFactory());
}
@Bean
public ProducerFactory<Integer, Object> producerFactory() {
return new DefaultKafkaProducerFactory<>(producerConfigs());
}
@Bean
public Map<String, Object> producerConfigs() {
Map<String, Object> props = new HashMap<>();
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, IntegerSerializer.class);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, JsonSerializer.class);
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, "{{ securityProtocol }}");
{%- if saslMechanism %}
props.put(SaslConfigs.SASL_MECHANISM, "{{ saslMechanism }}");
{%- endif -%}
{%- if saslJaasConfig %}
props.put(SaslConfigs.SASL_JAAS_CONFIG, "{{ saslJaasConfig | safe }}");
{% endif -%}
{%- if params.addTypeInfoHeader === 'false' %}
props.put(JsonSerializer.ADD_TYPE_INFO_HEADERS, false);
{% endif %}
props.put(JsonSerializer.TYPE_MAPPINGS,
{%- for schema in asyncapi.allSchemas().values() | isObjectType %}
{%- if schema.uid() | first !== '<' and schema.type() === 'object' %}
"{{schema.uid()}}:{{params['userJavaPackage']}}.model.{{schema.uid() | camelCase | upperFirst}}{% if not loop.last %}," +{% else %}"{% endif %}
{% endif -%}
{% endfor -%}
);
// See https://kafka.apache.org/documentation/#producerconfigs for more properties
return props;
}
{% endif %}
{%- if hasPublish %}
@Bean
KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<Integer, Object>>
kafkaListenerContainerFactory() {
ConcurrentKafkaListenerContainerFactory<Integer, Object> factory =
new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory());
factory.setConcurrency(concurrency);
factory.getContainerProperties().setPollTimeout(pollTimeout);
return factory;
}
@Bean
public ConsumerFactory<Integer, Object> consumerFactory() {
return new DefaultKafkaConsumerFactory<>(consumerConfigs());
}
@Bean
public Map<String, Object> consumerConfigs() {
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, IntegerDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
props.put(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, "{{ securityProtocol }}");
{%- if saslMechanism %}
props.put(SaslConfigs.SASL_MECHANISM, "{{ saslMechanism }}");
{%- endif -%}
{%- if saslJaasConfig %}
props.put(SaslConfigs.SASL_JAAS_CONFIG, "{{ saslJaasConfig | safe }}");
{% endif %}
props.put(JsonDeserializer.TYPE_MAPPINGS,
{%- for schema in asyncapi.allSchemas().values() | isObjectType %}
{%- if schema.uid() | first !== '<' and schema.type() === 'object' %}
"{{schema.uid()}}:{{params['userJavaPackage']}}.model.{{schema.uid() | camelCase | upperFirst}}{% if not loop.last %}," +{% else %}"{% endif %}
{% endif -%}
{% endfor -%}
);
props.put(JsonDeserializer.TRUSTED_PACKAGES, "{{params['userJavaPackage']}}.model");
return props;
}
{% endif %}
}
{% endmacro %}