micron-client
v3.0.3
Published
Client for interaction between micron-based microservices
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Micron Client
Client for interaction between micron based microservices.
The goal of micron is to simplify construction and communication between micro-services, regardless of the communication method. The client and service currently support communication over REST/HTTP, ØMQ, and others.
$ npm install --save micron-client
Key
Usage
Spot
- should be used in a shared fashion to prevent constant socket connection overhead
let micron = require('micron-client');
let client = micron({
userService : {
micron: 'zeromq', // specify zeromq as the communication method
// OR
micron: 'http', // specify HTTP as the communication method
prefix: 'v1', // prefix all request url's
host: '127.0.0.1', /// host of the service
port: 8001 // port of the service
}
});
let result = yield client.userService.post('user/create', {ß
email: '[email protected]',
password: 'Tester@1'
});
Middleware
- Allows sockets to stay open for server duration
let micron = require('micron-client');
let config = require('./services.json');
// koa
let koa = require('koa');
let koaApp = koa();
koaApp.use(micron.middleware.koa());
koaApp.listen(8000)
// express
 express = require('express');
let expressApp = express();
expressApp.use(micron.middleware.express());
expressApp.listen(8000)
Operations
.request
- Follows the object structure of the request module's base request builder
- The only major change is that the url and host are pulled from the config. The
opts.path
method should be used instead
- The only major change is that the url and host are pulled from the config. The
- All other operations are simply wrappers of this function
- Important notes
opts.path
should be used instead ofopts.url
(the host and port are added from the resource config)- No
opts.method
defaults toGET
- the
opts.path
string can use templates using keys on from theopts.parameters
object form
is aliased asbody
- All requests default to type JSON
yield client.someMicronService.request({
method: 'post',
path: '/foo/{foo_id}',
parameters: {
foo_id: 'FooId12345'
},
body: {
foo_property: 'bar'
},
qs: {
foo_query: 'bar'
}
});
.create/.post
- Wraps .request
- Takes arguments
(path, opts)
path
- Prefixed with the
host
,port
, andprefix
from the resource config - Supports templating with
{KEY}
againstopts.parameters
- Prefixed with the
opts
- If no
parameters
,body
,qs
, orheaders
param exists, the object will be set as the body/form
- If no
yield client.someMicronService.post('/foo/FooId12345', {
foo_property: 'bar'
});
// OR
yield client.someMicronService.post('/foo/{foo_id}', {
parameters: {
foo_id: 'FooId12345'
},
body: {
foo_property: 'bar'
}
});
.read/.get
- Wraps .request
- Takes arguments
(path, opts)
path
- Prefixed with the
host
,port
, andprefix
from the resource config - Supports templating with
{KEY}
againstopts.parameters
- Prefixed with the
opts
- If no
parameters
,body
,qs
, orheaders
param exists, the object will be set as the body/form
- If no
yield client.someMicronService.get('/foo/FooId12345?foo_query=bar');
// OR
yield client.someMicronService.get('/foo/{foo_id}', {
parameters: {
foo_id: 'FooId12345'
},
qs: {
foo_query: 'bar'
}
});
.update/.put
- Wraps .request
- Takes arguments
(path, opts)
path
- Prefixed with the
host
,port
, andprefix
from the resource config - Supports templating with
{KEY}
againstopts.parameters
- Prefixed with the
opts
- If no
parameters
,body
,qs
, orheaders
param exists, the object will be set as the body/form
- If no
yield client.someMicronService.put('/foo/FooId12345', {
foo_property: 'bar'
});
// OR
yield client.someMicronService.put('/foo/{foo_id}', {
parameters: {
foo_id: 'FooId12345'
},
body: {
foo_property: 'bar'
}
});
.destroy/.delete
- Wraps .request
- Takes arguments
(path, opts)
path
- Prefixed with the
host
,port
, andprefix
from the resource config - Supports templating with
{KEY}
againstopts.parameters
- Prefixed with the
opts
- If no
parameters
,body
,qs
, orheaders
param exists, the object will be set as the body/form
- If no
yield client.someMicronService.delete('/foo/FooId12345', {
foo_property: 'bar'
});
// OR
yield client.someMicronService.delete('/foo/{foo_id}', {
parameters: {
foo_id: 'FooId12345'
},
body: {
foo_property: 'bar'
}
});
.status
- Performs a
GET /status
on the service - The service will perform a
GET /status
on all of its dependent services - All ternary dependencies will be ignored to prevent a loop back
- Calling
Status
directly on micron-client will get the status of all registered services - Takes arguments [
opts
]opts.timeout
- timeout in milliseconds for each status request
// singular status
yield client.someMicronService.status();
// all status's
yield client.status();
Contributing
Add new clients to the ./lib/clients
directory as an independant file. Each client should support all operations above
Requirements
- the
opts
patameter of each request should follow the request module structure- rather than
url
, apath
parameter is expected - the path parameter should be used to map functionality of the service client being written
- rather than
- the
path
parameter should template properties ofopts.pathOpts
matching{OPT_NAME}