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meteor-wapi

v0.3.1

Published

Node module to allow CQRS-ing with Meteor

Downloads

7

Readme

Build Status Coverage Status Dependency Status devDependency Status

meteor-wapi

Node module to allow CQRS-ing with Meteor.

Install

npm i --save meteor-wapi

Example

var express     = require("express");
var MongoClient = require("mongodb").MongoClient;
var MW          = require("meteor-wapi");

var mongoUrl = process.env.MONGO_URL || "mongodb://localhost:3001/meteor";

MongoClient.connect(mongoUrl, function (err, db) {
    var mw = new MW(db);
    var optionalContext = {
        prefix: "echo: "
    };
    mw.methods({
        echo: function (string) {
            return this.prefix + string;
        }
    }, optionalContext);
    var app = express()
        .use("/call", mw.getRouter())
        .listen(process.env.PORT || 4000);
});

API

new MW(db)

Creates a new MW instance.

Arguments
  • db MongoClient connection required: a mongodb connection, as returned (via callback) by the MongoClient.connect method.
Returns

An MW instance.

.methods(methodsMap, optionalContext)

Registers one or more remote methods (mimicking Meteor's API). The methods will be invoked when the client POSTs a DDP method message to the server.

Methods can either:

  • throw an error
  • return a value
  • return a promise

If the method returns a value (or an eventually fulfilled promise), the client will receive the returned (or resolved) value in the DDP response message.

If the method throws (or returns an eventually rejected promise), the client will receive the error in the DDP response message. If the error is an instance of MW.Error, its code and message will be used for the reply. Otherwise a generic 500 INTERNAL SERVER ERROR error will be used.

Arguments
  • methodsMap string-function dictionary required: a dictionary of functions (just like in Meteor).

  • optionalContext object optional: an optional object which will be mixed in with the execution context of the method (the this value).

Returns

Nothing.

.getRouter()

Returns an express router which listens for POSTed DDP method messages, authenticates them and runs the appropriate methods.

Arguments

None.

Returns

An express router (to be used as argument to an express app use method).

Test

After cloning the repository and installing dependecies with npm install:

  • to run unit tests: npm run unit-tests
  • to run integration tests: npm run integration-tests (you need a running local mongo listening on port 27017)