62 lines
2.6 KiB
Java
62 lines
2.6 KiB
Java
import com.rabbitmq.client.*;
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import java.util.HashMap;
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import java.util.Map;
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public class EmitLogHeader {
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private static final String EXCHANGE_NAME = "header_test";
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public static void main(String[] argv) throws Exception {
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if (argv.length < 1) {
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System.err.println("Usage: EmitLogHeader message queueName [headers]...");
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System.exit(1);
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}
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// The API requires a routing key, but in fact if you are using a header exchange the
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// value of the routing key is not used in the routing. You can store information
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// for the receiver here as the routing key is still available in the received message.
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String routingKey = "ourTestRoutingKey";
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// Argument processing: the first arg is the message, the rest are
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// key value pairs for headers.
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String message = argv[0];
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// The map for the headers.
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Map<String, Object> headers = new HashMap<String, Object>();
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// The rest of the arguments are key value header pairs. For the purpose of this
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// example, we are assuming they are all strings, but that is not required by RabbitMQ
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for (int i = 1; i < argv.length; i++) {
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System.out.println("Adding header " + argv[i] + " with value " + argv[i + 1] + " to Map");
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headers.put(argv[i], argv[i + 1]);
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i++;
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}
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ConnectionFactory factory = new ConnectionFactory();
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factory.setHost("localhost");
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try (Connection connection = factory.newConnection();
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Channel channel = connection.createChannel()) {
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channel.exchangeDeclare(EXCHANGE_NAME, BuiltinExchangeType.HEADERS);
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AMQP.BasicProperties.Builder builder = new AMQP.BasicProperties.Builder();
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// MessageProperties.PERSISTENT_TEXT_PLAIN is a static instance of AMQP.BasicProperties
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// that contains a delivery mode and a priority. So we pass them to the builder.
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builder.deliveryMode(MessageProperties.PERSISTENT_TEXT_PLAIN.getDeliveryMode());
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builder.priority(MessageProperties.PERSISTENT_TEXT_PLAIN.getPriority());
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// Add the headers to the builder.
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builder.headers(headers);
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// Use the builder to create the BasicProperties object.
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AMQP.BasicProperties theProps = builder.build();
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// Now we add the headers. This example only uses string headers, but they can also be integers
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channel.basicPublish(EXCHANGE_NAME, routingKey, theProps, message.getBytes("UTF-8"));
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System.out.println(" [x] Sent message: '" + message + "'");
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}
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}
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}
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