Chapter 4. Examples
Chapter 4. Examples This chapter demonstrates the use of AMQ JavaScript through example programs. For more examples, see the AMQ JavaScript example suite and the Rhea examples . 4.1. Sending messages This client program connects to a server using <connection-url> , creates a sender for target <address> , sends a message containing <message-body> , closes the connection, and exits. Example: Sending messages "use strict"; var rhea = require("rhea"); var url = require("url"); if (process.argv.length !== 5) { console.error("Usage: send.js <connection-url> <address> <message-body>"); process.exit(1); } var conn_url = url.parse(process.argv[2]); var address = process.argv[3]; var message_body = process.argv[4]; var container = rhea.create_container(); container.on("sender_open", function (event) { console.log("SEND: Opened sender for target address '" + event.sender.target.address + "'"); }); container.on("sendable", function (event) { var message = { body: message_body }; event.sender.send(message); console.log("SEND: Sent message '" + message.body + "'"); event.sender.close(); event.connection.close(); }); var opts = { host: conn_url.hostname, port: conn_url.port || 5672, // To connect with a user and password: // username: "<username>", // password: "<password>", }; var conn = container.connect(opts); conn.open_sender(address); Running the example To run the example program, copy it to a local file and invoke it using the node command. For more information, see Chapter 3, Getting started . USD node send.js amqp://localhost queue1 hello 4.2. Receiving messages This client program connects to a server using <connection-url> , creates a receiver for source <address> , and receives messages until it is terminated or it reaches <count> messages. Example: Receiving messages "use strict"; var rhea = require("rhea"); var url = require("url"); if (process.argv.length !== 4 && process.argv.length !== 5) { console.error("Usage: receive.js <connection-url> <address> [<message-count>]"); process.exit(1); } var conn_url = url.parse(process.argv[2]); var address = process.argv[3]; var desired = 0; var received = 0; if (process.argv.length === 5) { desired = parseInt(process.argv[4]); } var container = rhea.create_container(); container.on("receiver_open", function (event) { console.log("RECEIVE: Opened receiver for source address '" + event.receiver.source.address + "'"); }); container.on("message", function (event) { var message = event.message; console.log("RECEIVE: Received message '" + message.body + "'"); received++; if (received == desired) { event.receiver.close(); event.connection.close(); } }); var opts = { host: conn_url.hostname, port: conn_url.port || 5672, // To connect with a user and password: // username: "<username>", // password: "<password>", }; var conn = container.connect(opts); conn.open_receiver(address); Running the example To run the example program, copy it to a local file and invoke it using the python command. For more information, see Chapter 3, Getting started . USD node receive.js amqp://localhost queue1
"use strict"; var rhea = require("rhea"); var url = require("url"); if (process.argv.length !== 5) { console.error("Usage: send.js <connection-url> <address> <message-body>"); process.exit(1); } var conn_url = url.parse(process.argv[2]); var address = process.argv[3]; var message_body = process.argv[4]; var container = rhea.create_container(); container.on("sender_open", function (event) { console.log("SEND: Opened sender for target address '" + event.sender.target.address + "'"); }); container.on("sendable", function (event) { var message = { body: message_body }; event.sender.send(message); console.log("SEND: Sent message '" + message.body + "'"); event.sender.close(); event.connection.close(); }); var opts = { host: conn_url.hostname, port: conn_url.port || 5672, // To connect with a user and password: // username: "<username>", // password: "<password>", }; var conn = container.connect(opts); conn.open_sender(address); node send.js amqp://localhost queue1 hello "use strict"; var rhea = require("rhea"); var url = require("url"); if (process.argv.length !== 4 && process.argv.length !== 5) { console.error("Usage: receive.js <connection-url> <address> [<message-count>]"); process.exit(1); } var conn_url = url.parse(process.argv[2]); var address = process.argv[3]; var desired = 0; var received = 0; if (process.argv.length === 5) { desired = parseInt(process.argv[4]); } var container = rhea.create_container(); container.on("receiver_open", function (event) { console.log("RECEIVE: Opened receiver for source address '" + event.receiver.source.address + "'"); }); container.on("message", function (event) { var message = event.message; console.log("RECEIVE: Received message '" + message.body + "'"); received++; if (received == desired) { event.receiver.close(); event.connection.close(); } }); var opts = { host: conn_url.hostname, port: conn_url.port || 5672, // To connect with a user and password: // username: "<username>", // password: "<password>", }; var conn = container.connect(opts); conn.open_receiver(address); node receive.js amqp://localhost queue1