rocketmq-client-nodejs-beta
Version:
RocketMQ Node.js Client
123 lines • 8.36 kB
JavaScript
;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MessageIdFactory = exports.MessageId = exports.MESSAGE_VERSION = void 0;
const address_1 = __importDefault(require("address"));
var MESSAGE_VERSION;
(function (MESSAGE_VERSION) {
MESSAGE_VERSION[MESSAGE_VERSION["V0"] = 0] = "V0";
MESSAGE_VERSION[MESSAGE_VERSION["V1"] = 1] = "V1";
})(MESSAGE_VERSION || (exports.MESSAGE_VERSION = MESSAGE_VERSION = {}));
class MessageId {
id;
/**
* e.g.: 0x01: fixed 1 byte for current version
* offset = 0
*/
version;
/**
* e.g.: 0x56F7E71C361B: lower 6 bytes of local mac address
* offset = 1
*/
macAddress;
/**
* e.g.: 0x21BC: lower 2 bytes of process id
* offset = 7
*/
processId;
/**
* e.g: 0x024CCDBE: seconds since 2021-01-01 00:00:00(UTC+0, lower 4 bytes)
* offset = 9
*/
timestamp;
/**
* e.g.: 0x00000000: sequence number(4 bytes)
* offset = 13
*/
sequence;
toString() {
return this.id;
}
}
exports.MessageId = MessageId;
const MAX_UINT32 = 0xFFFFFFFF;
const MAX_UINT16 = 0xFFFF;
/**
* Message Identifier
* https://github.com/apache/rocketmq-clients/blob/master/docs/message_id.md
*/
class MessageIdFactory {
// static #hostname = hostname();
static #sequence = 0;
static #buf = Buffer.alloc(1 + 6 + 2 + 4 + 4);
// 2021-01-01 00:00:00(UTC+0), 1609459200000
static #sinceTimestamp = new Date('2021-01-01T00:00:00Z').getTime() / 1000;
// lower 2 bytes of process id
static #processId = process.pid % MAX_UINT16;
static MAC = '000000000000';
static create() {
const messageId = new MessageId();
messageId.version = MESSAGE_VERSION.V1;
messageId.macAddress = this.MAC;
messageId.processId = this.#processId;
messageId.timestamp = this.#getCurrentTimestamp();
messageId.sequence = this.#sequence++;
if (this.#sequence > MAX_UINT32) {
this.#sequence = 0;
}
this.#buf.writeUInt8(messageId.version, 0);
this.#buf.write(messageId.macAddress, 1, 'hex');
this.#buf.writeUInt16BE(messageId.processId, 7);
this.#buf.writeUInt32BE(messageId.timestamp, 9);
this.#buf.writeUInt32BE(messageId.sequence, 13);
messageId.id = this.#buf.toString('hex').toUpperCase();
return messageId;
}
static decode(id) {
const messageId = new MessageId();
messageId.id = id;
this.#buf.write(id, 0, 'hex');
messageId.version = this.#buf.readUInt8(0);
messageId.macAddress = this.#buf.subarray(1, 7).toString('hex');
messageId.processId = this.#buf.readUInt16BE(7);
messageId.timestamp = this.#buf.readUInt32BE(9);
messageId.sequence = this.#buf.readUInt32BE(13);
return messageId;
}
static #getCurrentTimestamp() {
// use lower 4 bytes
return Math.floor(Date.now() / 1000 - this.#sinceTimestamp) % MAX_UINT32;
}
}
exports.MessageIdFactory = MessageIdFactory;
// set current mac address
address_1.default.mac((err, mac) => {
if (err) {
console.warn('[rocketmq-client-nodejs] can\'t get mac address, %s', err.message);
return;
}
if (!mac) {
console.warn('[rocketmq-client-nodejs] can\'t get mac address');
return;
}
MessageIdFactory.MAC = mac.replaceAll(':', '');
});
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