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promises.js
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promises.js
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const rhea = require('../lib/container');
const url = require('url');
async function connect(options) {
return new Promise((resolve, reject) => {
const connection = rhea.connect(options);
function onOpen(context) {
connection.removeListener('connection_open', onOpen);
connection.removeListener('connection_close', onClose);
connection.removeListener('disconnected', onClose);
resolve(connection);
}
function onClose(err) {
connection.removeListener('connection_open', onOpen);
connection.removeListener('connection_close', onClose);
connection.removeListener('disconnected', onClose);
reject(err);
}
connection.once('connection_open', onOpen);
connection.once('connection_close', onClose);
connection.once('disconnected', onClose);
});
}
async function createSession(connection) {
return new Promise((resolve, reject) => {
const session = connection.create_session();
function onOpen(context) {
session.removeListener('session_open', onOpen);
session.removeListener('session_close', onClose);
resolve(session);
}
function onClose(err) {
session.removeListener('session_open', onOpen);
session.removeListener('session_close', onClose);
reject(err);
}
session.once('session_open', onOpen);
session.once('session_close', onClose);
session.begin();
});
}
async function createSender(session, path, options) {
return new Promise((resolve, reject) => {
const sender = session.attach_sender(path, options);
function onOpen(context) {
sender.removeListener('sendable', onOpen);
sender.removeListener('sender_close', onClose);
resolve(sender);
}
function onClose(err) {
sender.removeListener('sendable', onOpen);
sender.removeListener('sender_close', onClose);
reject(err);
}
sender.once('sendable', onOpen);
sender.once('sender_close', onClose);
});
}
async function createReceiver(session, path, options) {
return new Promise((resolve, reject) => {
const receiver = session.attach_receiver(path, options);
function onOpen(context) {
receiver.removeListener('receiver_open', onOpen);
receiver.removeListener('receiver_close', onClose);
resolve(receiver);
}
function onClose(err) {
receiver.removeListener('receiver_open', onOpen);
receiver.removeListener('receiver_close', onClose);
reject(err);
}
receiver.once('receiver_open', onOpen);
receiver.once('receiver_close', onClose);
});
}
async function fromConnectionString(connectionString) {
const parsed = connectionString.split(';').reduce((acc, part) => {
const splitIndex = part.indexOf('=');
return {
...acc,
[part.substring(0, splitIndex)]: part.substring(splitIndex + 1)
};
}, {});
const queue = process.argv[3]
return await connect({
transport: 'tls',
host: url.parse(parsed.Endpoint).hostname,
hostname: url.parse(parsed.Endpoint).hostname,
username: parsed.SharedAccessKeyName,
password: parsed.SharedAccessKey,
port: 5671,
reconnect_limit: 100
});
}
function trackSends(sender) {
const pendingMessages = new Map();
function onSuccess(context) {
const deliveryTag = context.delivery.tag.toString('hex');
if (pendingMessages.has(deliveryTag)) {
pendingMessages.get(deliveryTag).resolve();
pendingMessages.delete(deliveryTag);
} else {
console.warn(`Tried to settle unknown message with tag ${deliveryTag}`);
}
}
function onFailure(context) {
const deliveryTag = context.delivery.tag.toString('hex');
if (pendingMessages.has(deliveryTag)) {
pendingMessages.get(deliveryTag).reject(new Error('Send failed'));
pendingMessages.delete(deliveryTag);
} else {
console.warn(`Tried to settle unknown message with tag ${deliveryTag}`);
}
}
sender.on('accepted', onSuccess);
sender.on('released', onFailure);
sender.on('rejected', onFailure);
sender.on('modified', onFailure);
return async (message) => {
const delivery = sender.send(message);
const deliveryTag = delivery.tag.toString('hex');
return new Promise((resolve, reject) => {
// TODO: timeout
pendingMessages.set(deliveryTag, { resolve, reject });
});
};
}
module.exports = { connect, createSession, createSender, createReceiver, trackSends, fromConnectionString };