This document summarizes a presentation on microservices and APIs. It discusses using different formats like JSON and XML for APIs, implementing hypermedia links between resources, and various authentication and authorization approaches. It also covers microservice architectures with services for different environments, communication between services, load balancing, service discovery, and monitoring.

1. Sevilla Developer Conference
#SVQDC 2017.02.18

4. Pedro J. Molina
@pmolinam

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11. “Las organizaciones que diseñan sistemas están limitadas
a producir diseños que copian las estructuras de comunicación
de esas organizaciones”.
Melvin Conway, 1968
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 application/json
 text/xml
 text/html
 text/plain
 text/csv
GET /actors/42
Accept: text/xml
200 OK
Content-Type: text/xml
<actor id="42">
<name>Jessica</name>
<lastname>Alba</lastname>
<filmography
url= "/films/42" />
</actor>

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GET /actors/42
Accept: application/json
200 OK
Content-Type: application/json
{ "id": 42
"name": "Jessica"
"lastname": "Alba"
"filmography": "/films/42"
}

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 GET /factura/217
 POST /factura/  201 Created
 <link rel=“lineas”
uri=“/factura/217/lineas”
/>

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{
“id”: 1234
“name”: “Alice in Wonderland”
“_links”: {
“self”: { “href”: “/book/10”},
“prev”: { “href”: “/book/9”},
“next”: { “href”: “/book/11”},
“action-delete”: {
“verb”: “DELETE”,
“href”: “/book/10”
}
}
}

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21. Dev
Local
:27001
Local
:5000
-
Navegador
Nube
db
:27001
app
:80
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Navegador
Producción
cluster
:27001
app :80
-
Navegador
lb: 443

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24. Client ExpressJS BaucisJS Mongoose MongoDB
HTTP req
resource
query/command
data
401 | 403
AuthN/AuthZ
middleware
<req.user, res>
Microservice

25. 
var express = require('express');
var app = express();
app.get('/hello', function(req, res) {
res.status(200).send('hello world');
});
/helloreq res

26. 
public class SampleModule : Nancy.NancyModule
{
public SampleModule()
{
Get["/hello"] = _ => “hello world";
}
}
/helloreq res

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28. exports.handler = function(event, context) {
switch (event.operation) {
case 'ping': context.succeed('pong'); return;
case 'getSample':
event.customArgs = ["rose:", "/tmp/rose.png"];
im.convert(event.customArgs, function(err, output) {
if (err) context.fail(err);
else {
var resultImgBase64 = new Buffer(
fs.readFileSync("/tmp/rose.png")).toString('base64');
try { fs.unlinkSync("/tmp/rose.png");} catch (e) {}
context.succeed(resultImgBase64);
}
});
break;
default:
return context.fail(new Error('Unrecognized operation "' +
event.operation + '"'));
}};

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30. 
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 connect-mongo
 nginx haproxy,
etc.
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 process.env.VAR1
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36. git remote add heroku https://git.heroku.com/app1.git
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/Procfile
 git push heroku master
web: node app/server.js

37. db:
image: dockerfile/mongodb
ports:
- "27017"
app:
build: .
environment:
NODE_ENV: production
PORT: 80
SERVICE_NAME: app
links:
- "db:DB"
ports:
- "80"
lb:
image: jasonwyatt/nginx-loadbalancer
links:
- app
environment:
APP_PATH: "/"
ports:
- "80:80"

38. db
app
lb app
app
#0
#1
#2
80
80 27017
consul prometheus
8500
8500
autoregistro
8500
autodescubre /metrics
/ping

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42. @pmolinam