CC-4010, Bringing Spatial Love to your Java Application, by Steven Citron-Pousty

APU13 - Bringing Spa-APU13 - Bringing Spa-tial Love to your Javatial Love to your Java

ApplicationApplicationhttp://talks.thesteve0.comhttp://talks.thesteve0.com

Presented by:

Steven PoustySteven Pousty@TheSteve0 on Twitter, IRC,@TheSteve0 on Twitter, IRC,

and Githuband Githubhttp://presentations-thesteve0.rhcloud.com/amdjavamongo/index.html?print-pdf

http://presentations-thesteve0.rhcloud.com/amdjavamongo/index.html?print-pdf

AgendaAgendaA little about MongoDB Spatial1.Some JEE2.Learn a bit about PaaS3.See some demos4.



AssumptionsAssumptionsYou write Java code1.You will ask questions2.



Types of NoSQL datasTypes of NoSQL datastorestores

TYPE Document Key-Value Graph DataProcessing

EXAMPLE MongoDB,Couchbase

Redis,Riak,Memcahe

Neo4J Hadoop,Cassandra,Voldemort

USE-CASE Documentstorageand search

Cachingor ObjectStore

Relationshipsbetween"things"

Large dataprocessing



On to MongoOn to Mongo



A bit about MongoDBA bit about MongoDBA document is just a bunch of attributes andvalues - think of it like HashMapCan be nested - helps avoid joinsSchemalessReally good at fast writes - but you give upimmediate consistencyEasy to horizontally scale



Now some spatialNow some spatialThe spatial functionality Mongo currently has is:

Near ($near)1.Containment ($geoWithin)2.Intersection ($geoIntersects )3.

It is all laid out here:It is all laid out here:

and here:and here:Geospatial Indexes and Queries

Geospatial Index Internals



Two types of indices:Two types of indices:2D - for flat surfaces1.2dsphere - helps with coords on an earth likesphere

2.



Good to KnowGood to KnowAssumes coords. are between [-180 and 180)Can handle any 2D coordinatesHas methods to handle curvature of the earth(spherical)

to human readable unitsFormula to convert



How do you make itHow do you make itworkwork

1. Put coordinates into an array1. Put coordinates into an array{ loc : [ 50 , 30 ] }{ loc : { x : 50 , y : 30 } }{ loc : { foo : 50 , y : 30 } }{ loc : { lon : 40.739037, lat: 73.992964 } } If you use lattitude and longitude with a default

2. Make a 2D index2. Make a 2D index db.places.ensureIndex( { loc : "2d" } )



JEE - CDI and JAX-RSJEE - CDI and JAX-RSContext Dependency Injection - allows you tomake classes availble whenever you need themand let the calling class decide which class it wantsJAX-RS - the antiSOAP (three cheers). Makes itsuper easy to write REST like architectures



Let's look at some codeLet's look at some codeBuild a spatial checkin serviceBuild a spatial checkin service

for national parks in US andfor national parks in US andCanadaCanada

Java - JEE using CDI and JAX-RSJava - JEE using CDI and JAX-RS

The full map front end app can be found here



Let's spin up a JEELet's spin up a JEE(JBoss EAP) and Mon-(JBoss EAP) and Mon-

goDB servergoDB server



One Source to BindOne Source to BindThem AllThem All





But wait - there's moreBut wait - there's moreFree! No time limit1.3 gears (like servers) - each 512 Mb RAM, 1 Gbdisk

2.

Simple pricing3.



Let's wrap it upLet's wrap it upOpenshift makes life great for you1.Spatial is easy and fun with MongoDB2.Free!3.

Come hang out with us:#openshift on freenode irc

[email protected]



Date post:	16-Jan-2015
Category:	Technology
Upload:	amd-developer-central
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CC-4010, Bringing Spatial Love to your Java Application, by Steven Citron-Pousty

Technology