How to use the Apache Avro IPC framework in Java for data communication
Apache Avro is an open source data serialization system that supports remote process calls (RPC) and data communication.AVRO uses JSON format to define data structures and protocols, and provides a mechanism from mobilizing generating Java code.
Apache Avro provides a mechanism called IPC (Inter-Process Communication) for data communication between different processes.Using the AVRO IPC framework, you can easily implement the remote process calls between clients and servers in Java applications.
Here are how to use the Apache Avro IPC framework to communicate with data communication:
Step 1: Define the data structure and protocol
First, you need to define data structure and protocols to interact between clients and servers.You can use Avro's architecture to define the data structure and protocol.AVDL uses JSON format to describe the data structure and protocol.
The following is a simple AVDL example:
json
@namespace("com.example")
protocol CalculatorProtocol {
record AddRequest {
int operand1;
int operand2;
}
record AddResponse {
int result;
}
AddResponse add(AddRequest request);
}
The above AVDL defines a protocol called Calculatorprotocol, which contains two data structures (AddRequest and AddResponse) and a method (ADD).The addRequest structure contains the number of two integer operations, and the addresponse structure contains an integer result.
Step 2: Generate java code
Next, you need to use the AVRO tool to generate a Java code.You can use Avro's command line tool or Gradle/Maven plug -in to perform this operation.The code generation process will generate the Java interface and data structure according to AVDL definition.
Step 3: Implement the server side
On the server side, you need to implement the method in the definition of the protocol.You can create a class that implements the corresponding interface and provide specific implementation of the method.
The following is a simple server example:
public class CalculatorServer implements CalculatorProtocol {
public AddResponse add(AddRequest request) {
int result = request.operand1 + request.operand2;
return new AddResponse(result);
}
public static void main(String[] args) throws Exception {
CalculatorServer server = new CalculatorServer();
NettyServer avroServer = new NettyServer(new SpecificResponder(CalculatorProtocol.class, server), new InetSocketAddress("localhost", 8080));
avroServer.start();
avroServer.join();
}
}
The above example defines a Calculatorserver class and implements the ADD method in the Calculatorprotocol interface.In the ADD method, it simply adds two operations and returns the result.
The server starts the address and port of the server with the NetTyServer class.Then, start the server via Avroserver.start (), and wait for the request through Avroserver.Join ().
Step 4: Implement the client
On the client, you need to create a client connected to the server and use the connection to call the method on the server.You can use the specific client class provided by Avro to implement this.
The following is a simple client example:
public class CalculatorClient {
public static void main(String[] args) throws Exception {
CalculatorProtocol calculator = SpecificRequestor.getClient(CalculatorProtocol.class, new HttpTransceiver(new URL("http://localhost:8080")));
AddRequest request = new AddRequest(10, 20);
AddResponse response = calculator.add(request);
System.out.println("Result: " + response.result);
}
}
The above example creates a CalculatorClient class.In the main method, it first creates a HTTP connection with the server, and then uses SpecificRequestor.getClient method to create a specific client instance.
Then, it creates an addrequest object and sets the value of the two operations.Finally, use the Calculator.add method to call the ADD method on the server and print the result.
Summarize:
The above is a simple example of data communication using the Apache Avro IPC framework.By defining the data structure and protocol, the Java code is generated to achieve the server and client, you can use AVRO IPC to communicate the data of cross -process data in the Java application.
