import java.util.Map;
import java.util.HashMap;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.MessageProperties;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.*;
public class EmitLogHeader {
private static final String EXCHANGE_NAME = "header_test";
public static void main(String[] argv) {
Connection connection = null;
Channel channel = null;
try {
if (argv.length < 1){
System.err.println("Usage: EmitLogHeader message queueName [headers]...");
System.exit(1);
}
// The API requires a routing key, but in fact if you are using a header exchange the
// value of the routing key is not used in the routing. You can store information
// for the receiver here as the routing key is still available in the received message.
String routingKey = "ourTestRoutingKey";
// Argument processing: the first arg is the message, the rest are
// key value pairs for headers.
String message = argv[0];
// The map for the headers.
Map<String, Object> headers = new HashMap<String, Object>();
// The rest of the arguments are key value header pairs. For the purpose of this
// example, we are assuming they are all strings, but that is not required by RabbitMQ
for(int i = 1; i < argv.length; i++) {
System.out.println("Adding header " + argv[i] + " with value " + argv[i + 1] + " to Map");
headers.put(argv[i], argv[i+1]);
i++;
}
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
connection = factory.newConnection();
channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "headers");
AMQP.BasicProperties.Builder builder = new AMQP.BasicProperties.Builder();
// MessageProperties.PERSISTENT_TEXT_PLAIN is a static instance of AMQP.BasicProperties
// that contains a delivery mode and a priority. So we pass them to the builder.
builder.deliveryMode(MessageProperties.PERSISTENT_TEXT_PLAIN.getDeliveryMode());
builder.priority(MessageProperties.PERSISTENT_TEXT_PLAIN.getPriority());
// Add the headers to the builder.
builder.headers(headers);
// Use the builder to create the BasicProperties object.
AMQP.BasicProperties theProps = builder.build();
// Now we add the headers. This example only uses string headers, but they can also be integers
channel.basicPublish(EXCHANGE_NAME, routingKey, theProps, message.getBytes());
System.out.println(" [x] Sent message: '" + message + "'");
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (connection != null) {
try {
connection.close();
}
catch (Exception ignore) {}
}
}
}
}