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.QueueingConsumer;
public class ReceiveLogHeader {
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: ReceiveLogsHeader queueName [headers]...");
System.exit(1);
}
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
connection = factory.newConnection();
channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "headers");
// 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 receive information
// from the sender here as the routing key is still available in the received message.
String routingKeyFromUser = "ourTestRoutingKey";
// Argument processing: the first arg is the local queue name, the rest are
// key value pairs for headers.
String queueInputName = 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
// Note that when you run this code you should include the x-match header on the command
// line. Example:
// java -cp $CP ReceiveLogsHeader testQueue1 x-match any header1 value1
for(int i = 1; i < argv.length; i++) {
headers.put(argv[i], argv[i+1]);
System.out.println("Binding header " + argv[i] + " and value " + argv[i + 1] + " to queue " + queueInputName);
i++;
}
String queueName = channel.queueDeclare(queueInputName, true, false, false, null).getQueue();
channel.queueBind(queueName, EXCHANGE_NAME, routingKeyFromUser, headers);
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
QueueingConsumer consumer = new QueueingConsumer(channel);
channel.basicConsume(queueName, true, consumer);
while (true) {
QueueingConsumer.Delivery delivery = consumer.nextDelivery();
String message = new String(delivery.getBody());
String routingKeyFromSender = delivery.getEnvelope().getRoutingKey();
System.out.println(" [x] Received '" + routingKeyFromSender + "':'" + message + "'");
}
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (connection != null) {
try {
connection.close();
}
catch (Exception ignore) {}
}
}
}
}