node_rabbitmq_client

This is the node client of rabbitmq. Before using this client, you must confirm:

1. rabbitmq is correctly installed in the current environment;
2. ES6 and above are required.

Installation

npm i @xiaojing0/amqpclient

Example

const amqpclient = require('@xiaojing0/amqpclient');
amqpclient.init('amqp://localhost?heartbeat=60', {isDebugMode: true, prefetch: 100});

// work task queue
amqpclient.receiveWorkTask('workQueueName', function (msg) {
    console.log(msg); // print: 'hi!!!'
});
amqpclient.sendWorkTask('workQueueName', 'hi!!!')

// rpc task queue
amqpclient.receiveRpcRequest('rpcQueueName', function (msg) {
    console.log(msg); // print: 'your name?'
    return 'rpc server!';
});
amqpclient.sendRpcRequest('rpcQueueName', 'your name?')
    .then((result) => {
        console.log(result); // print: 'rpc server!'
    });

Usage

First, we need to init a connection:

const amqpclient = require('@xiaojing0/amqpclient');
amqpclient.init('amqp://localhost?heartbeat=60', {isDebugMode: true, prefetch: 100});

• The initialization method receives two parameters, connectHost and configParams:

connectHost: 'amqp://localhost?heartbeat=60' // Message queue connection address

// [optional] Message queue config params
configParams: Object

// [optional] default to false, if set to true will show all AMQP logs
configParams.isDebugMode: Boolean,

 // [optional] default to 0 (no limit), This parameter limits the number of concurrent processing by the client in a unit of time.
configParams.prefetch: Number,

Note: The process of establishing a connection is completely asynchronous. You don't have to worry about requests that cannot be sent and answered during the connection establishment process. Because the client has a caching mechanism inside, all requests will be executed after the connection is established.

Send and receive a work task:

amqpclient.receiveWorkTask(workQueueName, consumeMethod, optionalParams);
amqpclient.sendWorkTask(workQueueName, taskData, optionalParams)

• The receiveWorkTask method params:

workQueueName: String, // Work queue name, must be unique

consumeMethod: Function, // A consumption method for a work task, which is used to receive a message that processes a task queue

 // [optional] The config params of work queue 
optionalParams: Object,

 // [optional] Queue config parameter, default to {durable: true}, support all queue configuration parameters
optionalParams.queueOpts: Object,

 // [optional] consume config parameter, default to {noAck: false}, support all message configuration parameters
optionalParams.consumeOpts: Object,

• The sendWorkTask method params:

workQueueName: String, // Work queue name, must be unique

taskData: String, // Task data must be String type


 // [optional] The config params of work queue 
optionalParams: Object,

 // [optional] Queue config parameter, default to {durable: true}, support all queue configuration parameters
optionalParams.queueOpts: Object,

 // [optional] message config parameter, default to {persistent: true}, support all message configuration parameters
optionalParams.msgOpts: Object,

Send and receive RPC:

amqpclient.receiveRpcRequest(rpcQueueName, consumeMethod);

const result = await amqpclient.sendRpcRequest(rpcQueueName, rpcData);

• The receiveRpcRequest method params:

rpcQueueName: String, // rpc queue name, must be unique

consumeMethod: Function, // A consumption method for a rpc task, which is used to receive a message that processes a rpc queue

• The sendRpcRequest method params:

rpcQueueName: String, // rpc queue name, must be unique

rpcData: String, // Task data must be String type

Note: The data returned by the rpc request is a serialized character type. If the returned result is an object, the type needs to be deserialized.

Tests

npm test

Contributing

Contributors