MindTree TechDays 3.0 -- Building Location Aware Application using MongoDB

MindTree TechDays 3.0 -- Building Location Aware Application using MongoDB

Transcript

1. OPENSHIFT Workshop PRESENTED BY Shekhar Gulati Building Location Aware Applications with MongoDB
2. AGENDA Introductions Theory Practical Overview
3. WHO AM I? • Shekhar Gulati -- OpenShift Developer Evangelist • Java / NoSQL / Cloud Guy • Learning JavaScript these days :) • Twitter Handle : shekhargulati • Facebook : shekhar.gulati.1 • Github https://github.com/shekhargulati • Slides https://speakerdeck.com/shekhargulati
4. WHO ARE YOU?
5. In how many days/months/years JavaScript was written?
6. WHAT WILL YOU LEARN? • What is MongoDB • MongoDB Geo spatial basics • What is PaaS • What is OpenShift • How to use OpenShift for deployment https://localjobs-t20.rhcloud.com/
7. ASSUMPTIONS • You want to learn how to use OpenShift • You can write or read Java • You have your own laptop • You will ask questions
8. There are no stupid questions only stupid answers. So ask questions ASK QUESTIONS
9. MONGODB
10. 10  Open Source NoSQL document datastore – JSON style documents  Schema-less – Each document is heterogeneous, and may have completely unique structure compared to other documents  Fast and horizontally scalable  Rich query language  Rich documents  Easy to get running  Geospatial indexing WHAT IS MONGODB
11. Database → Database Table → Collection Row → Document Index → Index MONGODB TERMINOLOGY MONGODB TERMINOLOGY
12. 12 RICH DOCUMENTS
13. 13 MongoDB Demo
14. 14  What is it for?  Find all the MongoDB jobs near me – Proximity Queries  Find all the MongoDB jobs within Colombo – Bounded Queries  Find all the MongoDB job at this location – Exact Queries • Supports only two dimensional indexes.  You can only have one geospatial index per collection.  By default, 2d geospatial indexes assume longitude and latitude have boundaries of -180 inclusive and 180 non-inclusive (i.e. [-180, 180)) GEOSPATIAL INDEXING BASICS
15. 15 1) Put your coordinates into an array { loc : [ 50 , 30 ] } //SUGGESTED OPTION { loc : { x : 50 , y : 30 } } { loc : { foo : 50 , y : 30 } } 1) { loc : { lon : 40.739037, lat: 73.992964 } } 2) Make a 2d index db.places.ensureIndex( { loc : "2d" } ) 3) If you use latitude and longitude as your coordinate system, always store longitude first. MongoDB’s 2d spherical index operators only recognize [ longitude, latitude] ordering. HOW TO MAKE IT WORK
16. 16 • When you create the index, MongoDB converts location data to binary geohash values and calculates these values using the location data and the index’s location range • Geohashes have a precision that is determined by the number of bits in the hash. Default value 26 • More bits allow the index to provide results with greater precision • You can configure number of bits at index creation db.collection.ensureIndex( {<location field>: "2d"} , { bits: <bit precision> } ) GEOHASHES
17. 17 • MongoDB supports compound geospatial indexes. • the field with location data is the first field db.jobs.ensureIndex( { location: "2d", skills: 1 } ) COMPOUND GEOSPATIAL INDEXES
18. 18 MongoDB Geospatial Demo
19. OpenShift CLOUD OVERVIEW
20. 20 Cloud Service Models STORAGE (RHS) HARDWARE (x86, Power, S/390) VIRTUALIZATION (RHEV) OPERATING SYSTEM (RHEL) APPLICATION PLATFORM (JBOSS, PHP, RUBY, ETC) APPLICATION Automated and Managed by the Public or Private Cloud Offering Managed and Controlled by Customer (IT, Dev, or User) IaaS PaaS SaaS Increased Control Increased Automation
21. • Quickly build the Application that YOU need for • Your Group, your Enterprise, your next great idea! • Big data, mobile, social • You code the application, We run it for you • Leverage the ease, scale and power of the Cloud Code Deploy Enjoy PaaS
22. EVERYONE GETS ALONG • Operations care about stability and performance • Developers just want environments without waiting OpenShift creates a peaceful environment for both parties
23. 23 01/05/13 Lowers Cost Improves Developer Efficiency Scales WHY CHOOSE PAAS
24. OpenShift OPENSHIFT OVERVIEW
25. 25 OpenShift is PaaS by Red Hat Multi-language, Auto-Scaling, Self-service, Elastic, Cloud Application Platform
26. 26  A free auto-scaling, cloud-based application platform from Red Hat.  Multi Language, Multi Frameworks, Multi Cartridges.  No proprietary software.  No Lock-in.  Open source – OpenShift Origin. INTRODUCING OPENSHIFT
27. origin Public Cloud Service On- premise or Private Cloud Software Open Source Project FLAVORS OF OPENSHIFT
28. Developer IDE Integrations Web Browser Console Command Line Tooling REST APIs INTERACTIONS
29. 29 WHAT's IN THE BOX
30. 30 OpenShift is the BEST PaaS for Java Developers
31. 31 • Can run any thing that's Java – Java EE or Spring does not matter. • Supports both Java 6 and Java 7 • Supports JBoss AS7, JBoss EAP 6.0, Tomcat 6 , and Tomcat 7 • Ability to write to persistent file system • Debugging support • Hot deployment • Eclipse tooling WHY OPENSHIFT IS BEST JAVA PAAS
32. 32 Let's get our hands dirty
33. 33 https://openshift.redhat.com/app/account/new Promo code is MINDTREE3 CREATING OPENSHIFT ACCOUNT
34. 34  OpenShift is free-as-in-beer & free-as-in-freedom  You get three free gears, each with 512MB memory and 1GB of disk space.  Need more resources, just ask!  The catch is we are in developer preview right now WHAT I GET
35. 35 ➢ Login to OpenShift web console ➢ Click on “My Account” ➢ Namespace – mindtree3 – Unique per user CREATING NAMESPACE
36. 36 DEMO : WORDPRESS IN CLOUD
37. 37 Some terminology for today 1. Application – your web code and any data store. Has to be on 1 or more gears 2. Gear – is like a server. It can have only 1 language for the web programming. 3. Cartridge – it adds a language, a data store, or other functionality 4. Git – used for version control and managing code between server and your development machine 5. Ssh – command line tool to connect to your gear
38. 38 Install Ruby 1.8.7 or greater Install Git Install rhc OpenShift gem Refer to documentation INSTALLING CLIENT TOOLS
39. 39 rhc setup -l <openshift_login> -> creates namespace -> upload ssh keys SETUP OPENSHIFT ENVIRONMENT
40. 40 BUILDING APPLICATION
41. 41  MongoDB 2.2  OpenShift  Java 7 – Spring Framework – Spring MongoDB  GIT  SSH TECHNOLOGY CHOICES
42. 42 $ rhc app create localjobs jbosseap mongodb-2.2 –from- code=git://github.com/shekhargulati/localjobs.git $ rhc app show -a localjobs $ scp jobs-data.json <ssh url>:app-root/data $ rhc app ssh -a localjobs $ cd app-root/data $ mongoimport -d localjobs -c jobs --file jobs-data.json -u $OPENSHIFT_MONGODB_DB_USERNAME -p $OPENSHIFT_MONGODB_DB_PASSWORD -h $OPENSHIFT_MONGODB_DB_HOST -port $OPENSHIFT_MONGODB_DB_PORT Instructions at https://github.com/shekhargulati/localjobs/blob/master/README.md DEMO : LOCALJOBS APP
43. 43 Code Walkthrough
44. QUESTIONS?
45. DONE!