amqp-client-type-fix
Version:
AMQP 0-9-1 client, both for browsers (WebSocket) and node (TCP Socket)
1,047 lines • 39.1 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AMQPChannel = void 0;
const amqp_error_js_1 = require("./amqp-error.js");
const amqp_view_js_1 = require("./amqp-view.js");
const amqp_queue_js_1 = require("./amqp-queue.js");
const amqp_consumer_js_1 = require("./amqp-consumer.js");
/**
* Represents an AMQP Channel. Almost all actions in AMQP are performed on a Channel.
*/
class AMQPChannel {
/**
* @param connection - The connection this channel belongs to
* @param id - ID of the channel
*/
constructor(connection, id) {
this.consumers = new Map();
this.rpcQueue = Promise.resolve(true);
this.unconfirmedPublishes = [];
this.closed = false;
this.confirmId = 0;
this.connection = connection;
this.id = id;
this.onerror = (reason) => this.logger?.error(`channel ${this.id} closed: ${reason}`);
}
get logger() {
return this.connection.logger;
}
open() {
let j = 0;
const channelOpen = new amqp_view_js_1.AMQPView(new ArrayBuffer(13));
channelOpen.setUint8(j, 1);
j += 1; // type: method
channelOpen.setUint16(j, this.id);
j += 2; // channel id
channelOpen.setUint32(j, 5);
j += 4; // frameSize
channelOpen.setUint16(j, 20);
j += 2; // class: channel
channelOpen.setUint16(j, 10);
j += 2; // method: open
channelOpen.setUint8(j, 0);
j += 1; // reserved1
channelOpen.setUint8(j, 206);
j += 1; // frame end byte
return this.sendRpc(channelOpen, j);
}
/**
* Declare a queue and return an AMQPQueue instance.
*/
queue(name = "", { passive = false, durable = name !== "", autoDelete = name === "", exclusive = name === "" } = {}, args = {}) {
return new Promise((resolve, reject) => {
this.queueDeclare(name, { passive, durable, autoDelete, exclusive }, args)
.then(({ name }) => resolve(new amqp_queue_js_1.AMQPQueue(this, name)))
.catch(reject);
});
}
/**
* Alias for basicQos
* @param prefetchCount - max inflight messages
*/
prefetch(prefetchCount) {
return this.basicQos(prefetchCount);
}
/**
* Default handler for Returned messages
* @param message returned from server
*/
onReturn(message) {
this.logger?.error("Message returned from server", message);
}
/**
* Close the channel gracefully
* @param [reason] might be logged by the server
*/
close(reason = "", code = 200) {
if (this.closed)
return this.rejectClosed();
this.closed = true;
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(512));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 0);
j += 4; // frameSize
frame.setUint16(j, 20);
j += 2; // class: channel
frame.setUint16(j, 40);
j += 2; // method: close
frame.setUint16(j, code);
j += 2; // reply code
j += frame.setShortString(j, reason); // reply reason
frame.setUint16(j, 0);
j += 2; // failing-class-id
frame.setUint16(j, 0);
j += 2; // failing-method-id
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return this.sendRpc(frame, j);
}
/**
* Synchronously receive a message from a queue
* @param queue - name of the queue to poll
* @param param
* @param [param.noAck=true] - if message is removed from the server upon delivery, or have to be acknowledged
* @return - returns null if the queue is empty otherwise a single message
*/
basicGet(queue, { noAck = true } = {}) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(512));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 11);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 70);
j += 2; // method: get
frame.setUint16(j, 0);
j += 2; // reserved1
j += frame.setShortString(j, queue); // queue
frame.setUint8(j, noAck ? 1 : 0);
j += 1; // noAck
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return this.sendRpc(frame, j);
}
/**
* Consume from a queue. Messages will be delivered asynchronously.
* @param queue - name of the queue to poll
* @param param
* @param [param.tag=""] - tag of the consumer, will be server generated if left empty
* @param [param.noAck=true] - if messages are removed from the server upon delivery, or have to be acknowledged
* @param [param.exclusive=false] - if this can be the only consumer of the queue, will return an Error if there are other consumers to the queue already
* @param [param.args={}] - custom arguments
* @param {function(AMQPMessage) : void} callback - will be called for each message delivered to this consumer
*/
basicConsume(queue, { tag = "", noAck = true, exclusive = false, args = {} } = {}, callback) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const noWait = false;
const noLocal = false;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 0);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 20);
j += 2; // method: consume
frame.setUint16(j, 0);
j += 2; // reserved1
j += frame.setShortString(j, queue); // queue
j += frame.setShortString(j, tag); // tag
let bits = 0;
if (noLocal)
bits = bits | (1 << 0);
if (noAck)
bits = bits | (1 << 1);
if (exclusive)
bits = bits | (1 << 2);
if (noWait)
bits = bits | (1 << 3);
frame.setUint8(j, bits);
j += 1; // noLocal/noAck/exclusive/noWait
j += frame.setTable(j, args); // arguments table
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return new Promise((resolve, reject) => {
this.sendRpc(frame, j).then((consumerTag) => {
const consumer = new amqp_consumer_js_1.AMQPConsumer(this, consumerTag, callback);
this.consumers.set(consumerTag, consumer);
resolve(consumer);
}).catch(reject);
});
}
/**
* Cancel/stop a consumer
* @param tag - consumer tag
*/
basicCancel(tag) {
if (this.closed)
return this.rejectClosed();
const noWait = false;
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(512));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 0);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 30);
j += 2; // method: cancel
j += frame.setShortString(j, tag); // tag
frame.setUint8(j, noWait ? 1 : 0);
j += 1; // noWait
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return new Promise((resolve, reject) => {
this.sendRpc(frame, j).then((consumerTag) => {
const consumer = this.consumers.get(consumerTag);
if (consumer) {
consumer.setClosed();
this.consumers.delete(consumerTag);
}
resolve(this);
}).catch(reject);
});
}
/**
* Acknowledge a delivered message
* @param deliveryTag - tag of the message
* @param [multiple=false] - batch confirm all messages up to this delivery tag
*/
basicAck(deliveryTag, multiple = false) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(21));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 13);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 80);
j += 2; // method: ack
frame.setUint64(j, deliveryTag);
j += 8;
frame.setUint8(j, multiple ? 1 : 0);
j += 1;
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.connection.send(new Uint8Array(frame.buffer, 0, 21));
}
/**
* Acknowledge a delivered message
* @param deliveryTag - tag of the message
* @param [requeue=false] - if the message should be requeued or removed
* @param [multiple=false] - batch confirm all messages up to this delivery tag
*/
basicNack(deliveryTag, requeue = false, multiple = false) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(21));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 13);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 120);
j += 2; // method: nack
frame.setUint64(j, deliveryTag);
j += 8;
let bits = 0;
if (multiple)
bits = bits | (1 << 0);
if (requeue)
bits = bits | (1 << 1);
frame.setUint8(j, bits);
j += 1;
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.connection.send(new Uint8Array(frame.buffer, 0, 21));
}
/**
* Acknowledge a delivered message
* @param deliveryTag - tag of the message
* @param [requeue=false] - if the message should be requeued or removed
*/
basicReject(deliveryTag, requeue = false) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(21));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 13);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 90);
j += 2; // method: reject
frame.setUint64(j, deliveryTag);
j += 8;
frame.setUint8(j, requeue ? 1 : 0);
j += 1;
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.connection.send(new Uint8Array(frame.buffer, 0, 21));
}
/**
* Tell the server to redeliver all unacknowledged messages again, or reject and requeue them.
* @param [requeue=false] - if the message should be requeued or redeliviered to this channel
*/
basicRecover(requeue = false) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(13));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 5);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 110);
j += 2; // method: recover
frame.setUint8(j, requeue ? 1 : 0);
j += 1;
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.sendRpc(frame, j);
}
/**
* Publish a message
* @param exchange - the exchange to publish to, the exchange must exists
* @param routingKey - routing key
* @param data - the data to be published, can be a string or an uint8array
* @param properties - properties to be published
* @param [mandatory] - if the message should be returned if there's no queue to be delivered to
* @param [immediate] - if the message should be returned if it can't be delivered to a consumer immediately (not supported in RabbitMQ)
* @return - fulfilled when the message is enqueue on the socket, or if publish confirm is enabled when the message is confirmed by the server
*/
async basicPublish(exchange, routingKey, data, properties = {}, mandatory = false, immediate = false) {
if (this.closed)
return this.rejectClosed();
if (this.connection.blocked)
return Promise.reject(new amqp_error_js_1.AMQPError(`Connection blocked by server: ${this.connection.blocked}`, this.connection));
let body;
if (typeof Buffer !== "undefined" && data instanceof Buffer) {
body = data;
}
else if (data instanceof Uint8Array) {
body = data;
}
else if (data instanceof ArrayBuffer) {
body = new Uint8Array(data);
}
else if (data === null) {
body = new Uint8Array(0);
}
else if (typeof data === "string") {
body = this.connection.textEncoder.encode(data);
}
else {
throw new TypeError(`Invalid type ${typeof data} for parameter data`);
}
let j = 0;
// get a buffer from the pool or create a new, it will later be returned to the pool for reuse
let buffer = this.connection.bufferPool.pop() || new amqp_view_js_1.AMQPView(new ArrayBuffer(this.connection.frameMax));
buffer.setUint8(j, 1);
j += 1; // type: method
buffer.setUint16(j, this.id);
j += 2; // channel
j += 4; // frame size, update later
buffer.setUint16(j, 60);
j += 2; // class: basic
buffer.setUint16(j, 40);
j += 2; // method: publish
buffer.setUint16(j, 0);
j += 2; // reserved1
j += buffer.setShortString(j, exchange); // exchange
j += buffer.setShortString(j, routingKey); // routing key
let bits = 0;
if (mandatory)
bits = bits | (1 << 0);
if (immediate)
bits = bits | (1 << 1);
buffer.setUint8(j, bits);
j += 1; // mandatory/immediate
buffer.setUint8(j, 206);
j += 1; // frame end byte
buffer.setUint32(3, j - 8); // update frameSize
const headerStart = j;
buffer.setUint8(j, 2);
j += 1; // type: header
buffer.setUint16(j, this.id);
j += 2; // channel
j += 4; // frame size, update later
buffer.setUint16(j, 60);
j += 2; // class: basic
buffer.setUint16(j, 0);
j += 2; // weight
buffer.setUint32(j, 0);
j += 4; // bodysize (upper 32 of 64 bits)
buffer.setUint32(j, body.byteLength);
j += 4; // bodysize
j += buffer.setProperties(j, properties); // properties
buffer.setUint8(j, 206);
j += 1; // frame end byte
buffer.setUint32(headerStart + 3, j - headerStart - 8); // update frameSize
let bufferView = new Uint8Array(buffer.buffer);
const bodyFrameCount = Math.ceil(body.byteLength / (this.connection.frameMax - 8));
const bufferSize = j + body.byteLength + 8 * bodyFrameCount;
if (buffer.byteLength < bufferSize) { // the body doesn't fit in the buffer, expand it
const newBuffer = new ArrayBuffer(bufferSize);
const newBufferView = new Uint8Array(newBuffer);
newBufferView.set(bufferView.subarray(0, j));
buffer = new amqp_view_js_1.AMQPView(newBuffer);
bufferView = newBufferView;
}
// split body into multiple frames if body > frameMax
for (let bodyPos = 0; bodyPos < body.byteLength;) {
const frameSize = Math.min(body.byteLength - bodyPos, this.connection.frameMax - 8); // frame overhead is 8 bytes
const dataSlice = body.subarray(bodyPos, bodyPos + frameSize);
buffer.setUint8(j, 3);
j += 1; // type: body
buffer.setUint16(j, this.id);
j += 2; // channel
buffer.setUint32(j, frameSize);
j += 4; // frameSize
bufferView.set(dataSlice, j);
j += frameSize; // body content
buffer.setUint8(j, 206);
j += 1; // frame end byte
bodyPos += frameSize;
}
const sendFrames = this.connection.send(bufferView.subarray(0, j));
this.connection.bufferPool.push(buffer); // return buffer to buffer pool for later reuse
// if publish confirm is enabled, put a promise on a queue if the sends were ok
// the promise on the queue will be fullfilled by the read loop when an ack/nack
// comes from the server
if (this.confirmId) {
const wait4Confirm = new Promise((resolve, reject) => this.unconfirmedPublishes.push([this.confirmId++, resolve, reject]));
return sendFrames.then(() => wait4Confirm);
}
else {
return sendFrames.then(() => 0);
}
}
/**
* Set prefetch limit.
* Recommended to set as each unacknowledged message will be stored in memory of the client.
* The server won't deliver more messages than the limit until messages are acknowledged.
* @param prefetchCount - number of messages to limit to
* @param prefetchSize - number of bytes to limit to (not supported by RabbitMQ)
* @param global - if the prefetch is limited to the channel, or if false to each consumer
*/
basicQos(prefetchCount, prefetchSize = 0, global = false) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(19));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 11);
j += 4; // frameSize
frame.setUint16(j, 60);
j += 2; // class: basic
frame.setUint16(j, 10);
j += 2; // method: qos
frame.setUint32(j, prefetchSize);
j += 4; // prefetch size
frame.setUint16(j, prefetchCount);
j += 2; // prefetch count
frame.setUint8(j, global ? 1 : 0);
j += 1; // glocal
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.sendRpc(frame, j);
}
/**
* Enable or disable flow. Disabling flow will stop the server from delivering messages to consumers.
* Not supported in RabbitMQ
* @param active - false to stop the flow, true to accept messages
*/
basicFlow(active = true) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(13));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 5);
j += 4; // frameSize
frame.setUint16(j, 20);
j += 2; // class: channel
frame.setUint16(j, 20);
j += 2; // method: flow
frame.setUint8(j, active ? 1 : 0);
j += 1; // active flow
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.sendRpc(frame, j);
}
/**
* Enable publish confirm. The server will then confirm each publish with an Ack or Nack when the message is enqueued.
*/
confirmSelect() {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(13));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 5);
j += 4; // frame size
frame.setUint16(j, 85);
j += 2; // class: confirm
frame.setUint16(j, 10);
j += 2; // method: select
frame.setUint8(j, 0);
j += 1; // noWait
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.sendRpc(frame, j); // parseFrames in base will set channel.confirmId = 0
}
/**
* Declare a queue
* @param name - name of the queue, if empty the server will generate a name
* @param params
* @param [params.passive=false] - if the queue name doesn't exists the channel will be closed with an error, fulfilled if the queue name does exists
* @param [params.durable=true] - if the queue should survive server restarts
* @param [params.autoDelete=false] - if the queue should be deleted when the last consumer of the queue disconnects
* @param [params.exclusive=false] - if the queue should be deleted when the channel is closed
* @param args - optional custom queue arguments
* @return fulfilled when confirmed by the server
*/
queueDeclare(name = "", { passive = false, durable = name !== "", autoDelete = name === "", exclusive = name === "" } = {}, args = {}) {
if (this.closed)
return this.rejectClosed();
const noWait = false;
let j = 0;
const declare = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
declare.setUint8(j, 1);
j += 1; // type: method
declare.setUint16(j, this.id);
j += 2; // channel: 1
declare.setUint32(j, 0);
j += 4; // frameSize
declare.setUint16(j, 50);
j += 2; // class: queue
declare.setUint16(j, 10);
j += 2; // method: declare
declare.setUint16(j, 0);
j += 2; // reserved1
j += declare.setShortString(j, name); // name
let bits = 0;
if (passive)
bits = bits | (1 << 0);
if (durable)
bits = bits | (1 << 1);
if (exclusive)
bits = bits | (1 << 2);
if (autoDelete)
bits = bits | (1 << 3);
if (noWait)
bits = bits | (1 << 4);
declare.setUint8(j, bits);
j += 1;
j += declare.setTable(j, args); // arguments
declare.setUint8(j, 206);
j += 1; // frame end byte
declare.setUint32(3, j - 8); // update frameSize
return this.sendRpc(declare, j);
}
/**
* Delete a queue
* @param name - name of the queue, if empty it will delete the last declared queue
* @param params
* @param [params.ifUnused=false] - only delete if the queue doesn't have any consumers
* @param [params.ifEmpty=false] - only delete if the queue is empty
*/
queueDelete(name = "", { ifUnused = false, ifEmpty = false } = {}) {
if (this.closed)
return this.rejectClosed();
const noWait = false;
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(512));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 0);
j += 4; // frameSize
frame.setUint16(j, 50);
j += 2; // class: queue
frame.setUint16(j, 40);
j += 2; // method: delete
frame.setUint16(j, 0);
j += 2; // reserved1
j += frame.setShortString(j, name); // name
let bits = 0;
if (ifUnused)
bits = bits | (1 << 0);
if (ifEmpty)
bits = bits | (1 << 1);
if (noWait)
bits = bits | (1 << 2);
frame.setUint8(j, bits);
j += 1;
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return this.sendRpc(frame, j);
}
/**
* Bind a queue to an exchange
* @param queue - name of the queue
* @param exchange - name of the exchange
* @param routingKey - key to bind with
* @param args - optional arguments, e.g. for header exchanges
* @return fulfilled when confirmed by the server
*/
queueBind(queue, exchange, routingKey, args = {}) {
if (this.closed)
return this.rejectClosed();
const noWait = false;
let j = 0;
const bind = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
bind.setUint8(j, 1);
j += 1; // type: method
bind.setUint16(j, this.id);
j += 2; // channel: 1
bind.setUint32(j, 0);
j += 4; // frameSize
bind.setUint16(j, 50);
j += 2; // class: queue
bind.setUint16(j, 20);
j += 2; // method: bind
bind.setUint16(j, 0);
j += 2; // reserved1
j += bind.setShortString(j, queue);
j += bind.setShortString(j, exchange);
j += bind.setShortString(j, routingKey);
bind.setUint8(j, noWait ? 1 : 0);
j += 1; // noWait
j += bind.setTable(j, args);
bind.setUint8(j, 206);
j += 1; // frame end byte
bind.setUint32(3, j - 8); // update frameSize
return this.sendRpc(bind, j);
}
/**
* Unbind a queue from an exchange
* @param queue - name of the queue
* @param exchange - name of the exchange
* @param routingKey - key that was bound
* @param args - arguments, e.g. for header exchanges
* @return fulfilled when confirmed by the server
*/
queueUnbind(queue, exchange, routingKey, args = {}) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const unbind = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
unbind.setUint8(j, 1);
j += 1; // type: method
unbind.setUint16(j, this.id);
j += 2; // channel: 1
unbind.setUint32(j, 0);
j += 4; // frameSize
unbind.setUint16(j, 50);
j += 2; // class: queue
unbind.setUint16(j, 50);
j += 2; // method: unbind
unbind.setUint16(j, 0);
j += 2; // reserved1
j += unbind.setShortString(j, queue);
j += unbind.setShortString(j, exchange);
j += unbind.setShortString(j, routingKey);
j += unbind.setTable(j, args);
unbind.setUint8(j, 206);
j += 1; // frame end byte
unbind.setUint32(3, j - 8); // update frameSize
return this.sendRpc(unbind, j);
}
/**
* Purge a queue
* @param queue - name of the queue
* @return fulfilled when confirmed by the server
*/
queuePurge(queue) {
if (this.closed)
return this.rejectClosed();
const noWait = false;
let j = 0;
const purge = new amqp_view_js_1.AMQPView(new ArrayBuffer(512));
purge.setUint8(j, 1);
j += 1; // type: method
purge.setUint16(j, this.id);
j += 2; // channel: 1
purge.setUint32(j, 0);
j += 4; // frameSize
purge.setUint16(j, 50);
j += 2; // class: queue
purge.setUint16(j, 30);
j += 2; // method: purge
purge.setUint16(j, 0);
j += 2; // reserved1
j += purge.setShortString(j, queue);
purge.setUint8(j, noWait ? 1 : 0);
j += 1; // noWait
purge.setUint8(j, 206);
j += 1; // frame end byte
purge.setUint32(3, j - 8); // update frameSize
return this.sendRpc(purge, j);
}
/**
* Declare an exchange
* @param name - name of the exchange
* @param type - type of exchange (direct, fanout, topic, header, or a custom type)
* @param param
* @param [param.passive=false] - if the exchange name doesn't exists the channel will be closed with an error, fulfilled if the exchange name does exists
* @param [param.durable=true] - if the exchange should survive server restarts
* @param [param.autoDelete=false] - if the exchange should be deleted when the last binding from it is deleted
* @param [param.internal=false] - if exchange is internal to the server. Client's can't publish to internal exchanges.
* @param args - optional arguments
* @return Fulfilled when the exchange is created or if it already exists
*/
exchangeDeclare(name, type, { passive = false, durable = true, autoDelete = false, internal = false } = {}, args = {}) {
const noWait = false;
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 0);
j += 4; // frame size
frame.setUint16(j, 40);
j += 2; // class: exchange
frame.setUint16(j, 10);
j += 2; // method: declare
frame.setUint16(j, 0);
j += 2; // reserved1
j += frame.setShortString(j, name);
j += frame.setShortString(j, type);
let bits = 0;
if (passive)
bits = bits | (1 << 0);
if (durable)
bits = bits | (1 << 1);
if (autoDelete)
bits = bits | (1 << 2);
if (internal)
bits = bits | (1 << 3);
if (noWait)
bits = bits | (1 << 4);
frame.setUint8(j, bits);
j += 1;
j += frame.setTable(j, args);
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return this.sendRpc(frame, j);
}
/**
* Delete an exchange
* @param name - name of the exchange
* @param param
* @param [param.ifUnused=false] - only delete if the exchange doesn't have any bindings
* @return Fulfilled when the exchange is deleted or if it's already deleted
*/
exchangeDelete(name, { ifUnused = false } = {}) {
const noWait = false;
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(512));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel
frame.setUint32(j, 0);
j += 4; // frame size
frame.setUint16(j, 40);
j += 2; // class: exchange
frame.setUint16(j, 20);
j += 2; // method: declare
frame.setUint16(j, 0);
j += 2; // reserved1
j += frame.setShortString(j, name);
let bits = 0;
if (ifUnused)
bits = bits | (1 << 0);
if (noWait)
bits = bits | (1 << 1);
frame.setUint8(j, bits);
j += 1;
frame.setUint8(j, 206);
j += 1; // frame end byte
frame.setUint32(3, j - 8); // update frameSize
return this.sendRpc(frame, j);
}
/**
* Exchange to exchange binding.
* @param destination - name of the destination exchange
* @param source - name of the source exchange
* @param routingKey - key to bind with
* @param args - optional arguments, e.g. for header exchanges
* @return fulfilled when confirmed by the server
*/
exchangeBind(destination, source, routingKey = "", args = {}) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const bind = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
bind.setUint8(j, 1);
j += 1; // type: method
bind.setUint16(j, this.id);
j += 2; // channel: 1
bind.setUint32(j, 0);
j += 4; // frameSize
bind.setUint16(j, 40);
j += 2; // class: exchange
bind.setUint16(j, 30);
j += 2; // method: bind
bind.setUint16(j, 0);
j += 2; // reserved1
j += bind.setShortString(j, destination);
j += bind.setShortString(j, source);
j += bind.setShortString(j, routingKey);
bind.setUint8(j, 0);
j += 1; // noWait
j += bind.setTable(j, args);
bind.setUint8(j, 206);
j += 1; // frame end byte
bind.setUint32(3, j - 8); // update frameSize
return this.sendRpc(bind, j);
}
/**
* Delete an exchange-to-exchange binding
* @param destination - name of destination exchange
* @param source - name of the source exchange
* @param routingKey - key that was bound
* @param args - arguments, e.g. for header exchanges
* @return fulfilled when confirmed by the server
*/
exchangeUnbind(destination, source, routingKey = "", args = {}) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const unbind = new amqp_view_js_1.AMQPView(new ArrayBuffer(4096));
unbind.setUint8(j, 1);
j += 1; // type: method
unbind.setUint16(j, this.id);
j += 2; // channel: 1
unbind.setUint32(j, 0);
j += 4; // frameSize
unbind.setUint16(j, 40);
j += 2; // class: exchange
unbind.setUint16(j, 40);
j += 2; // method: unbind
unbind.setUint16(j, 0);
j += 2; // reserved1
j += unbind.setShortString(j, destination);
j += unbind.setShortString(j, source);
j += unbind.setShortString(j, routingKey);
unbind.setUint8(j, 0);
j += 1; // noWait
j += unbind.setTable(j, args);
unbind.setUint8(j, 206);
j += 1; // frame end byte
unbind.setUint32(3, j - 8); // update frameSize
return this.sendRpc(unbind, j);
}
/**
* Set this channel in Transaction mode.
* Rember to commit the transaction, overwise the server will eventually run out of memory.
*/
txSelect() {
return this.txMethod(10);
}
/**
* Commit a transaction
*/
txCommit() {
return this.txMethod(20);
}
/**
* Rollback a transaction
*/
txRollback() {
return this.txMethod(30);
}
txMethod(methodId) {
if (this.closed)
return this.rejectClosed();
let j = 0;
const frame = new amqp_view_js_1.AMQPView(new ArrayBuffer(12));
frame.setUint8(j, 1);
j += 1; // type: method
frame.setUint16(j, this.id);
j += 2; // channel: 1
frame.setUint32(j, 4);
j += 4; // frameSize
frame.setUint16(j, 90);
j += 2; // class: Tx
frame.setUint16(j, methodId);
j += 2;
frame.setUint8(j, 206);
j += 1; // frame end byte
return this.sendRpc(frame, j);
}
/**
* Send a RPC request, will resolve a RPC promise when RPC response arrives
* @param frame with data
* @param frameSize - bytes the frame actually is
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
sendRpc(frame, frameSize) {
return new Promise((resolve, reject) => {
this.rpcQueue = this.rpcQueue.then(() => {
this.connection.send(new Uint8Array(frame.buffer, 0, frameSize))
.then(() => {
this.resolveRPC = resolve;
this.rejectRPC = reject;
})
.catch(reject);
});
});
}
/**
* Marks the channel as closed
* All outstanding RPC requests will be rejected
* All outstanding publish confirms will be rejected
* All consumers will be marked as closed
* @ignore
* @param [err] - why the channel was closed
*/
setClosed(err) {
const closedByServer = err !== undefined;
err || (err = new Error("Connection closed by client"));
if (!this.closed) {
this.closed = true;
this.consumers.forEach((consumer) => consumer.setClosed(err));
this.consumers.clear();
this.rejectRPC(err);
// Reject and clear all unconfirmed publishes
this.unconfirmedPublishes.forEach(([, , reject]) => reject(err));
this.unconfirmedPublishes.length = 0;
if (closedByServer)
this.onerror(err.message);
}
}
/**
* @return Rejected promise with an error
*/
rejectClosed() {
return Promise.reject(new amqp_error_js_1.AMQPError("Channel is closed", this.connection));
}
/**
* Called from AMQPBaseClient when a publish is confirmed by the server.
* Will fulfill one or more (if multiple) Unconfirmed Publishes.
* @ignore
* @param deliveryTag
* @param multiple - true if all unconfirmed publishes up to this deliveryTag should be resolved or just this one
* @param nack - true if negative confirm, hence reject the unconfirmed publish(es)
*/
publishConfirmed(deliveryTag, multiple, nack) {
// is queueMicrotask() needed here?
const idx = this.unconfirmedPublishes.findIndex(([tag,]) => tag === deliveryTag);
if (idx !== -1) {
const confirmed = multiple ?
this.unconfirmedPublishes.splice(0, idx + 1) :
this.unconfirmedPublishes.splice(idx, 1);
confirmed.forEach(([tag, resolve, reject]) => {
if (nack)
reject(new Error("Message rejected"));
else
resolve(tag);
});
}
else {
this.logger?.warn("Cant find unconfirmed deliveryTag", deliveryTag, "multiple:", multiple, "nack:", nack);
}
}
/**
* Called from AMQPBaseClient when a message is ready
* @ignore
* @param message
*/
onMessageReady(message) {
if (this.delivery) {
delete this.delivery;
this.deliver(message);
}
else if (this.getMessage) {
delete this.getMessage;
this.resolveRPC(message);
}
else {
delete this.returned;
this.onReturn(message);
}
}
/**
* Resolvs next RPC command
* @ignore
*/
resolveRPC(value) { value; }
/**
* Reject next RPC command
* @ignore
*/
rejectRPC(err) { err; }
/**
* Deliver a message to a consumer
* @ignore
*/
deliver(message) {
queueMicrotask(() => {
const consumer = this.consumers.get(message.consumerTag);
if (consumer) {
consumer.onMessage(message);
}
else {
this.logger?.warn("Consumer", message.consumerTag, "not available on channel", this.id);
}
});
}
}
exports.AMQPChannel = AMQPChannel;
//# sourceMappingURL=amqp-channel.js.map