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add kafka producer consumer #7

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5 changes: 5 additions & 0 deletions pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,11 @@
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
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16 changes: 16 additions & 0 deletions src/main/java/com/example/easynotes/controller/NoteController.java
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@@ -1,6 +1,8 @@
package com.example.easynotes.controller;

import com.example.easynotes.exception.ResourceNotFoundException;
import com.example.easynotes.kafka.consumer.NotesEventConsumer;
import com.example.easynotes.kafka.producer.NotesEventProducer;
import com.example.easynotes.model.Note;
import com.example.easynotes.model.SearchNote;
import com.example.easynotes.repository.NoteRepository;
Expand All @@ -11,6 +13,7 @@
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import javax.annotation.PostConstruct;
import javax.validation.Valid;

import java.util.ArrayList;
Expand All @@ -29,11 +32,23 @@ public class NoteController {
@Autowired
NoteRepository noteRepository;

@Autowired
NotesEventProducer eventProducer;
@Autowired
NotesEventConsumer eventConsumer;

@Autowired
esInterface es;

private static final Logger logger = LoggerFactory.getLogger(NoteController.class);

@PostConstruct
public void init() {
// Start consuming events in a separate thread
Thread consumerThread = new Thread(() -> eventConsumer.consumeEvents());
consumerThread.start();
}

@CrossOrigin(origins = "*")
@GetMapping("/notes")
public List<Note> getAllNotes(@RequestParam(defaultValue="10", name="limit") String limit,
Expand All @@ -54,6 +69,7 @@ public List<Note> getAllNotes(@RequestParam(defaultValue="10", name="limit") Str
public Note createNote(@Valid @RequestBody Note note) {
Note res = noteRepository.save(note);
es.addToES(res);
eventProducer.sendEvent(res.getContent());
return res;
}

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43 changes: 43 additions & 0 deletions src/main/java/com/example/easynotes/kafka/consumer/NotesEventConsumer.java
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@@ -0,0 +1,43 @@
package com.example.easynotes.kafka.consumer;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.springframework.stereotype.Service;

import java.time.Duration;
import java.util.Collections;
import java.util.Properties;

@Service
public class NotesEventConsumer {
private final KafkaConsumer<String, String> consumer;
// private final String topic;

public NotesEventConsumer() {
// this.topic = "notes-repo";
Properties props = new Properties();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092"); // Change to your Kafka broker address
props.put(ConsumerConfig.GROUP_ID_CONFIG, "notes-group"); // Consumer group id
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
this.consumer = new KafkaConsumer<>(props);
}

public void consumeEvents() {
String topic = "notes-repo";
consumer.subscribe(Collections.singletonList(topic));

while (true) {
ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
for (ConsumerRecord<String, String> record : records) {
System.out.println("[+][+][+]Received message: " + record.value() + "[+][+][+]");
}
}
}

public void close() {
consumer.close();
}
}
31 changes: 31 additions & 0 deletions src/main/java/com/example/easynotes/kafka/producer/NotesEventProducer.java
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@@ -0,0 +1,31 @@
package com.example.easynotes.kafka.producer;


import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.springframework.stereotype.Service;

import java.util.Properties;

@Service
public class NotesEventProducer {
private final KafkaProducer<String, String> producer;
// private final String topic;

public NotesEventProducer() {
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092"); // Change to your Kafka broker address
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
this.producer = new KafkaProducer<>(props);
}

public void sendEvent(String message) {
String topic = "notes-repo";
producer.send(new ProducerRecord<>(topic, message));
}

public void close() {
producer.close();
}
}