Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/AvroKafkaApplication.java

@@ -0,0 +1,18 @@
+package com.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.stream.annotation.EnableBinding;
+import org.springframework.cloud.stream.messaging.Processor;
+import org.springframework.cloud.stream.schema.client.EnableSchemaRegistryClient;
+
+@SpringBootApplication
+@EnableBinding(Processor.class)
+@EnableSchemaRegistryClient
+public class AvroKafkaApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(AvroKafkaApplication.class, args);
+    }
+
+}

spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/config/SchemRegistryConfig.java

@@ -0,0 +1,18 @@
+package com.baeldung.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.cloud.stream.schema.client.ConfluentSchemaRegistryClient;
+import org.springframework.cloud.stream.schema.client.SchemaRegistryClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class SchemRegistryConfig {
+
+    @Bean
+    public SchemaRegistryClient schemaRegistryClient(@Value("${spring.cloud.stream.kafka.binder.producer-properties.schema.registry.url}") String endPoint) {
+        ConfluentSchemaRegistryClient client = new ConfluentSchemaRegistryClient();
+        client.setEndpoint(endPoint);
+        return client;
+    }
+}

spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/consumer/AvroConsumer.java

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+package com.baeldung.consumer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.cloud.stream.annotation.StreamListener;
+import org.springframework.cloud.stream.messaging.Processor;
+import org.springframework.stereotype.Service;
+
+import com.baeldung.schema.Employee;
+
+@Service
+public class AvroConsumer {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(AvroConsumer.class);
+
+    @StreamListener(Processor.INPUT)
+    public void consumeEmployeeDetails(Employee employeeDetails) {
+        LOGGER.info("Let's process employee details: {}", employeeDetails);
+    }
+
+}

spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/controller/AvroController.java

@@ -0,0 +1,22 @@
+package com.baeldung.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.producer.AvroProducer;
+
+@RestController
+public class AvroController {
+
+    @Autowired
+    private AvroProducer avroProducer;
+
+    @PostMapping("/employees/{id}/{firstName}/{lastName}")
+    public String producerAvroMessage(@PathVariable int id, @PathVariable String firstName, @PathVariable String lastName) {
+        avroProducer.produceEmployeeDetails(id, firstName, lastName);
+        return "Sent employee details to consumer";
+    }
+
+}

spring-cloud/spring-cloud-stream/spring-cloud-stream-kafka/src/main/java/com/baeldung/producer/AvroProducer.java

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+package com.baeldung.producer;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.stream.messaging.Processor;
+import org.springframework.kafka.support.KafkaHeaders;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.support.MessageBuilder;
+import org.springframework.stereotype.Service;
+
+import com.baeldung.schema.Employee;
+import com.baeldung.schema.EmployeeKey;
+
+@Service
+public class AvroProducer {
+
+    @Autowired
+    private Processor processor;
+
+    public void produceEmployeeDetails(int empId, String firstName, String lastName) {
+
+        // creating employee details
+        Employee employee = new Employee();
+        employee.setId(empId);
+        employee.setFirstName(firstName);
+        employee.setLastName(lastName);
+        employee.setDepartment("IT");
+        employee.setDesignation("Engineer");
+
+        // creating partition key for kafka topic
+        EmployeeKey employeeKey = new EmployeeKey();
+        employeeKey.setId(empId);
+        employeeKey.setDepartmentName("IT");
+
+        Message<Employee> message = MessageBuilder.withPayload(employee)
+            .setHeader(KafkaHeaders.MESSAGE_KEY, employeeKey)
+            .build();
+
+        processor.output()
+            .send(message);
+    }
+
+}