RabbitMQ Java Client

import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import com.rabbitmq.client.CancelCallback;

import com.rabbitmq.client.*;

// Create connection factory and configure
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setPort(5672);
factory.setUsername("guest");
factory.setPassword("guest");
factory.setVirtualHost("/");

// Create connection and channel
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();

// Declare a queue
channel.queueDeclare("hello", false, false, false, null);

// Publish a message
String message = "Hello World!";
channel.basicPublish("", "hello", null, message.getBytes("UTF-8"));

// Consume messages
DeliverCallback deliverCallback = (consumerTag, delivery) -> {
    String receivedMessage = new String(delivery.getBody(), "UTF-8");
    System.out.println("Received: " + receivedMessage);
};
channel.basicConsume("hello", true, deliverCallback, consumerTag -> { });

// Clean up
channel.close();
connection.close();

// Connection factory for creating connections
public class ConnectionFactory implements Cloneable {
    public Connection newConnection() throws IOException, TimeoutException;
    public void setHost(String host);
    public void setPort(int port);
    public void setUsername(String username);
    public void setPassword(String password);
    public void setVirtualHost(String virtualHost);
    public void setUri(String uri) throws URISyntaxException, NoSuchAlgorithmException, KeyManagementException;
}

// Connection interface
public interface Connection extends Closeable, ShutdownNotifier {
    Channel createChannel() throws IOException;
    boolean isOpen();
    Map<String, Object> getServerProperties();
    void addShutdownListener(ShutdownListener listener);
    void close() throws IOException;
}

// Channel interface for AMQP operations
public interface Channel extends Closeable, ShutdownNotifier {
    int getChannelNumber();
    Connection getConnection();
    boolean isOpen();
    void close() throws IOException, TimeoutException;
}

// Basic message publishing
void basicPublish(String exchange, String routingKey, BasicProperties props, byte[] body) throws IOException;

// Exchange operations
Exchange.DeclareOk exchangeDeclare(String exchange, String type) throws IOException;
Exchange.DeclareOk exchangeDeclare(String exchange, String type, boolean durable, boolean autoDelete, Map<String, Object> arguments) throws IOException;
Exchange.DeleteOk exchangeDelete(String exchange) throws IOException;
Exchange.BindOk exchangeBind(String destination, String source, String routingKey) throws IOException;

// Queue operations
Queue.DeclareOk queueDeclare(String queue, boolean durable, boolean exclusive, boolean autoDelete, Map<String, Object> arguments) throws IOException;
Queue.DeleteOk queueDelete(String queue) throws IOException;
Queue.BindOk queueBind(String queue, String exchange, String routingKey) throws IOException;

// Message consuming
String basicConsume(String queue, boolean autoAck, DeliverCallback deliverCallback, CancelCallback cancelCallback) throws IOException;
GetResponse basicGet(String queue, boolean autoAck) throws IOException;
void basicAck(long deliveryTag, boolean multiple) throws IOException;
void basicNack(long deliveryTag, boolean multiple, boolean requeue) throws IOException;

// Functional interfaces for consumers
@FunctionalInterface
public interface DeliverCallback {
    void handle(String consumerTag, Delivery delivery) throws IOException;
}

@FunctionalInterface
public interface CancelCallback {
    void handle(String consumerTag) throws IOException;
}

// Consumer interface
public interface Consumer {
    void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException;
    void handleCancel(String consumerTag) throws IOException;
    String getConsumerTag();
}

// Address and resolver classes
public class Address {
    public static Address[] parseAddresses(String addresses) throws IOException;
    public String getHost();
    public int getPort();
}

public interface AddressResolver {
    List<Address> getAddresses() throws IOException;
}

// Authentication configuration
public interface SaslConfig {
    SaslMechanism getSaslMechanism(String[] serverMechanisms);
}

// Core exception types
public class ShutdownSignalException extends RuntimeException {
    public Object getReason();
    public boolean isHardError();
    public boolean isInitiatedByApplication();
}

// Recovery interfaces
public interface RecoverableConnection extends Connection {
    void addRecoveryListener(RecoveryListener listener);
    boolean isOpen();
}

public interface RecoveryListener {
    void handleRecovery(Recoverable recoverable);
    void handleRecoveryStarted(Recoverable recoverable);
}

// Publisher confirms
void confirmSelect() throws IOException;
boolean waitForConfirms() throws InterruptedException;
void addConfirmListener(ConfirmListener listener);

@FunctionalInterface
public interface ConfirmCallback {
    void handle(long deliveryTag, boolean multiple) throws IOException;
}

// Returns handling
void addReturnListener(ReturnListener listener);

@FunctionalInterface
public interface ReturnCallback {
    void handle(Return returnMessage) throws IOException;
}

// RPC client for making calls
public class RpcClient {
    public RpcClient(Channel channel, String exchange, String routingKey) throws IOException;
    public byte[] primitiveCall(byte[] message) throws IOException, ShutdownSignalException, TimeoutException;
    public String stringCall(String message) throws IOException, ShutdownSignalException, TimeoutException;
    public void close() throws IOException;
}

// RPC server for handling calls
public abstract class RpcServer {
    public abstract byte[] handleCall(byte[] requestBody, AMQP.BasicProperties replyProperties);
    public void mainloop() throws IOException;
}

// Metrics collection interface
public interface MetricsCollector {
    void newConnection(Connection connection);
    void closeConnection(Connection connection);
    void newChannel(Channel channel);
    void closeChannel(Channel channel);
    void basicPublish(Channel channel);
    void basicConsume(Channel channel, String queue, boolean autoAck);
}

// Message delivery information
public class Delivery {
    public Envelope getEnvelope();
    public AMQP.BasicProperties getProperties();
    public byte[] getBody();
}

// Envelope contains routing information
public class Envelope {
    public long getDeliveryTag();
    public boolean isRedeliver();
    public String getExchange();
    public String getRoutingKey();
}

// Message properties
public class AMQP.BasicProperties {
    public String getContentType();
    public String getContentEncoding();
    public Map<String, Object> getHeaders();
    public Integer getDeliveryMode();
    public Integer getPriority();
    public String getCorrelationId();
    public String getReplyTo();
    public String getExpiration();
    public String getMessageId();
    public Date getTimestamp();
    public String getType();
    public String getUserId();
    public String getAppId();
}

// Queue information response
public class GetResponse {
    public Envelope getEnvelope();
    public AMQP.BasicProperties getProps();
    public byte[] getBody();
    public int getMessageCount();
}

// Returned message information
public class Return {
    public int getReplyCode();
    public String getReplyText();
    public String getExchange();
    public String getRoutingKey();
    public AMQP.BasicProperties getProperties();
    public byte[] getBody();
}