SenchaCon 2016: LinkRest - Modern RESTful API Framework for Ext JS Apps - Rousland Zenetl

Dec 6, 2016Download as ppt, pdf1 like829 views

LinkRest is an active project commissioned and open sourced by NHL under Apache 2.0 license. It was conceived specifically as the server-side counterpart to Ext JS, so it natively supports Ext JS rest proxy, including CRUD, grouping, sorting, filtering, and more. In this session, we'll review Ext JS protocol support. You'll also see extensions that allow the client to safely query the server for specific data and shape the response. We'll cover advanced features, including security, constraints, idempotent methods, and metadata service. We'll show demos and try to allow time for Q&A.

LinkRest — Modern RESTful API
Framework for ExtJS Apps
Rouslan Zenetl,
Director of App Development, NHL

SenchaCon 2016: LinkRest - Modern RESTful API Framework for Ext JS Apps - Rousland Zenetl

LinkRest
What is it?
• . . .a protocol
- fully compatible with Ext.data.proxy.Rest
• . . .an implementation of the protocol
- extensible

LinkRest Stack
Data Storage
JDBC, NoSQL, more..
Data Storage
JDBC, NoSQL, more..

LinkRest Stack
ORM
Cayenne, POJO, more..
ORM
Cayenne, POJO, more..
Data Storage
JDBC, NoSQL, more..
Data Storage
JDBC, NoSQL, more..

LinkRest Stack
LinkRestLinkRest
ORM
Cayenne, POJO, more..
ORM
Cayenne, POJO, more..
Data Storage
JDBC, NoSQL, more..
Data Storage
JDBC, NoSQL, more..

LinkRestLinkRest
ORM
Cayenne, POJO, more..
ORM
Cayenne, POJO, more..
Data Storage
JDBC, NoSQL, more..
Data Storage
JDBC, NoSQL, more..
ExtJS
ApplicationClient

LinkRest
What it is not?
• . . .not a comprehensive application framework (not Spring or Rails)
• . . .not a complete application server
• . . .not an immediate replacement for any of your existing frameworks

LinkRest Coexists
LinkRestLinkRest
ORM
Cayenne, POJO, more..
ORM
Cayenne, POJO, more..
Data Storage
JDBC, NoSQL, more..
Data Storage
JDBC, NoSQL, more..
Existing APIs

LinkRest
Factoids
• LinkRest is a project commissioned and open sourced by NHL under Apache 2.0
license
• It was conceived specifically as the server-side counterpart to ExtJS
• First released on May 15, 2014
• Hosted on github.com/nhl/link-rest
• Current version is 2.2
• 60+ apps in production

Compatibility
Cayenne ORM, JDBC
• DBs supported by Cayenne
- DB2, Derby, FireBird, FrontBase, HSQLDB,
H2, Ingres, MySQL, Oracle (10i, 8, 8i, 9i),
PostgreSQL (7.4, 8.*), SQLite 3.*,
SQLServer, Sybase
• Alternative ORMs possible
• ORM-free is also supported (POJO)
- transient objects, e.g. session, status, etc.
LinkRestLinkRest
ORM
Cayenne, POJO, more..
ORM
Cayenne, POJO, more..
Data Storage
JDBC, NoSQL, more..
Data Storage
JDBC, NoSQL, more..

# Create a model (or a batch)
POST http://localhost/senchacon/rest/team
# Update a model
PUT http://localhost/senchacon/rest/team/42
# Delete a model
DELETE http://localhost/senchacon/rest/team/42
# Get a single model
GET http://localhost/senchacon/rest/team/42
# Get a collection of models
GET http://localhost/senchacon/rest/team
# Get a sorted collection of models
GET http://localhost/senchacon/rest/team?sort=abbrev
Ext.data.proxy.Rest
Support
• CRUD
• batchActions:true supported
• Paging (start/limit)
• Sorting
• Autocomplete (combo query)
• Filtering (operator, disabled)

Demo DB Schema
We’ll use this simple database for demos today (NOT
REAL DATA)

$package com.nhl.senchacon.rest; @Path("team") @Produces(MediaType.APPLICATION_JSON) public class TeamResource { @Context private Configuration config; @GET public DataResponse<Team> teams( @Context UriInfo uriInfo) { return LinkRest .select(Team.class, config) .uri(uriInfo) .select(); } @PUT @Consumes(MediaType.APPLICATION_JSON) @Path("{id}") public DataResponse<Team> update( @PathParam("id") int id, String data, @Context UriInfo uriInfo) { return LinkRest.update(Team.class, config) .uri(uriInfo) .syncAndSelect(data); } } TeamResource.java$

LinkRest Features
LinkRest protocol extensions and functionality
enhancements
• LinkRestProxy
• include/exclude
• object include
• filters and sorters
• cayenneExp (JPA)
• EntityProperty (entity encoder)
• POJO encoding
• mapBy
• Multi-source
• Idempotent updates (and creates)
• Meta-data service

Security
Constraints
• Underimplement HTTP methods
• Trim ORM graph of unnecessary relationships
• @ClientReadable / @ClientWritable
• Constraints

Further Information
Please contribute!
github.com/nhl/link-rest
github.com/nhl
@rzenetl

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