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package org.onap.ranapp.kafka.client;
import java.util.Arrays;
import java.util.Properties;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.onap.ranapp.kafka.listener.RanAppEventConsumer;
import org.onap.ranapp.kafka.model.appmodels.PolicytypetoTopicMapping;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.http.ResponseEntity;
import org.springframework.retry.backoff.FixedBackOffPolicy;
import org.springframework.retry.policy.SimpleRetryPolicy;
import org.springframework.retry.support.RetryTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
import lombok.AccessLevel;
import lombok.Getter;
import reactor.core.Disposable;
@Component
public class KafkaClientRanappTopic {
private static final Logger logger = LoggerFactory.getLogger(KafkaClientRanappTopic.class);
@Value("${kafkadispatcher.url}")
private String kafkaclient_url;
@Value("${ranapp.policytype}")
private String policytype_name;
@Value(value = "${kafka.bootstrapAddress}")
private String bootstrapAddress;
@Value(value = "${ranapp.testing.topic.id}")
private String groupId;
public static String requestTopicName = "";
public static String responseTopicName = "";
@Getter(AccessLevel.PROTECTED)
private Disposable refreshTask = null;
@Autowired
RanAppEventConsumer ranappeventconsumer;
private RestTemplate restTemplate = new RestTemplate();
@Bean
public RetryTemplate retryTemplate() {
int maxAttempt = Integer.parseInt("10");
int retryTimeInterval = Integer.parseInt("5000");
SimpleRetryPolicy retryPolicy = new SimpleRetryPolicy();
retryPolicy.setMaxAttempts(maxAttempt);
FixedBackOffPolicy backOffPolicy = new FixedBackOffPolicy();
backOffPolicy.setBackOffPeriod(retryTimeInterval); // 1.5 seconds
RetryTemplate template = new RetryTemplate();
template.setRetryPolicy(retryPolicy);
template.setBackOffPolicy(backOffPolicy);
return template;
}
public void getRanApp_KafkaTopicnames() {
logger.info("Requesting for KafkaTopics");
stop();
refreshTask=retryTemplate().execute(context -> {
String url = kafkaclient_url + policytype_name ;
System.out.println("retrying Connection: "+url);
ResponseEntity<PolicytypetoTopicMapping> requestData = restTemplate.getForEntity(url, PolicytypetoTopicMapping.class);
PolicytypetoTopicMapping policytoTopicMapping=requestData.getBody();
requestTopicName=policytoTopicMapping.getRequest_topic();
responseTopicName=policytoTopicMapping.getResponse_topic();
logger.info("Request Topic for Policy "+ policytype_name +" "+ requestTopicName);
logger.info("Response Topic for Policy "+ policytype_name +" "+ responseTopicName);
Properties properties=new Properties();
properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,bootstrapAddress);
properties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class.getName());
properties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,StringDeserializer.class.getName());
properties.setProperty(ConsumerConfig.GROUP_ID_CONFIG,groupId);
properties.setProperty(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG,"earliest");
//creating consumer
KafkaConsumer<String,String> consumer= new KafkaConsumer<String,String>(properties);
//Subscribing
consumer.subscribe(Arrays.asList(requestTopicName));
ranappeventconsumer.consume(consumer,requestTopicName,responseTopicName);
logger.info("Response ..."+ requestData);
throw new IllegalStateException("Something went wrong");
});
}
public void stop() {
if (refreshTask != null) {
refreshTask.dispose();
}
}
}
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