Mobile 1: Mobile Apps with MongoDB
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The document describes the design of a mobile scavenger hunt app. It includes 3 parts: 1) architecture and design, 2) geo-spatial indexing and queries, and 3) deployment readiness. The app allows users to create scavenger hunts by pinning waypoints. Players can search for hunts near their location and track their progress. The design involves collections for waypoints, users, messages, and notifications to support location-based games and social features.
![12
Waypoint
{ _id: ObjectId(),
user: UUID,
tour: UUDI
name: "Doug's Dogs",
desc: "The best hot-dog",
clues: [
"Hungry for a Coney Island?",
"Ask for Dr. Frankenfurter",
"Look for the hot dog stand"
],
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1] }
};](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-12-320.jpg)
![13
Waypoint
{ _id: ObjectId(),
user: UUID,
tour: UUDI
name: "Doug's Dogs",
desc: "The best hot-dog",
clues: [
"Hungry for a Coney Island?",
"Ask for Dr. Frankenfurter",
"Look for the hot dog stand"
],
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1] }
};](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-13-320.jpg)
![14
Waypoint
{ _id: ObjectId(),
user: UUID,
tour: UUDI
name: "Doug's Dogs",
desc: "The best hot-dog",
clues: [
"Hungry for a Coney Island?",
"Ask for Dr. Frankenfurter",
"Look for the hot dog stand"
],
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1] }
};
Geospacial Index:
ensureIndex(
{ geometry: “2dsphere” }
)](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-14-320.jpg)
![18
Waypoint
Application Server DatabaseMobile Client
RESTful Service
scavenger.com/waypoints?lat=40.87&lon=-73.87&max=100
HTTP GET
Query
{ ‘$geoNear’: {
‘$geometry’: {
type: "Point",
coordinates: [ -174.9559, 40.6544 ]
},
‘maxDistance’: 100
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-18-320.jpg)
![20
The Checkpoint Document
{
_id: ObjectId(),
user: UUID,
huntId: UUID,
timestamp: ISODate(),
geometry: {
type: "Point",
coordinates: [ long, lat ]
}
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-20-320.jpg)
![23
User Collection
{
_id: UUID,
name: “Bryan Reinero’,
email: “bryan@mongodb.com”,
pass: “dontyouwishyouknew”,
description: “I am just a guy”,
followers: [
“Achille”,
“Jason”,
“Steffan”,
“Norm”
]
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-23-320.jpg)
![27
Notifications / Messaging
Message
{
sender: “Hypatia”,
recipients: [
“Democritus”,
“Euripides”,
“Eratosthenes”
]
date: ISODate(),
message: “truth is a point of view, and
so is changeable”
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-27-320.jpg)
![28
Notifications / Messaging
Message
{
sender: “Hypatia”,
recipients: [
“Democritus”,
“Euripides”,
“Eratosthenes”
]
date: ISODate(),
message: “truth is a point of view, and
so is changeable”
}
db.messages.find(
{ recipients: “Democritus”}
);](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-28-320.jpg)
![35
Notifications / Messaging
{user: “Hypatia”,
ctime: ISODate(),
mtime: ISODate(),
count: 10,
inbox: [
<message>,
<message>,
<message>,
…
]
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-35-320.jpg)
![41
Personal Timeline / Hotlist
{
_id: UUID,
user: ”Democritus",
hotList" : [
{
message: "New scavenger hunt tomorrow!",
url: "http://bit.ly/1hKn9ff",
date" : ISODate()
},
{
message: "Get 50% off at Toga City",
url: "http://bit.ly/1KnlFHQ",
date: ISODate()
}
],
atime: ISODate("20150313T04:38:43.606Z")
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-41-320.jpg)
![42
Personal Timeline / Hotlist
Notifications of highest
user relevance
{
_id: UUID,
user: ”Democritus",
hotList" : [
{
message: "New scavenger hunt tomorrow!",
url: "http://bit.ly/1hKn9ff",
date" : ISODate()
},
{
message: "Get 50% off at Toga City",
url: "http://bit.ly/1KnlFHQ",
date: ISODate()
}
],
atime: ISODate("20150313T04:38:43.606Z")
}](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-42-320.jpg)
![43
Personal Timeline / Hotlist
db.user.update(
{"user" : "Democritus"},
{$push : { ”hotList” : {
$each : [ { <MESSAGE> } ],
$slice : -50 }
}},
false, false)](https://image.slidesharecdn.com/part1-150605180944-lva1-app6892/85/Mobile-1-Mobile-Apps-with-MongoDB-43-320.jpg)
Mobile 1: Mobile Apps with MongoDB
- 1. Building a Mobile App! Part 1 { name: ‘Bryan Reinero’, title: ‘Developer Advocate’, twitter: ‘@blimpyacht’, code: ‘github.com/breinero’ email: ‘bryan@mongdb.com’ }
- 2. 2 Track Agenda • Part 1: Architecture and Application Design • Part 2: Geo-Spatial Indexing and Queries • Part 3:Deployment Readiness
- 3. 3 Mobile Applications • Location based data • User relevance • Context Rich • Social Engagement
- 4. 4 The Scavenger Hunt App Users create scavenger hunts by “pinning” waypoints
- 5. 5 The Scavenger Hunt App Players search for a scavenger hunt near their current position
- 6. 6 The Scavenger Hunt App Basic Requirements
- 7. 7 The Scavenger Hunt App Basic Requirements • Mark target points
- 8. 8 The Scavenger Hunt App Basic Requirements • Mark target points • Identify our users
- 9. 9 The Scavenger Hunt App Basic Requirements • Mark target points • Identify our users • Mark users’ progress during hunts
- 10. Schema Design
- 11. 11 The Scavenger Hunt App Users create scavenger hunts by “pinning” waypoints
- 12. 12 Waypoint { _id: ObjectId(), user: UUID, tour: UUDI name: "Doug's Dogs", desc: "The best hot-dog", clues: [ "Hungry for a Coney Island?", "Ask for Dr. Frankenfurter", "Look for the hot dog stand" ], "geometry": { "type": "Point", "coordinates": [125.6, 10.1] } };
- 13. 13 Waypoint { _id: ObjectId(), user: UUID, tour: UUDI name: "Doug's Dogs", desc: "The best hot-dog", clues: [ "Hungry for a Coney Island?", "Ask for Dr. Frankenfurter", "Look for the hot dog stand" ], "geometry": { "type": "Point", "coordinates": [125.6, 10.1] } };
- 14. 14 Waypoint { _id: ObjectId(), user: UUID, tour: UUDI name: "Doug's Dogs", desc: "The best hot-dog", clues: [ "Hungry for a Coney Island?", "Ask for Dr. Frankenfurter", "Look for the hot dog stand" ], "geometry": { "type": "Point", "coordinates": [125.6, 10.1] } }; Geospacial Index: ensureIndex( { geometry: “2dsphere” } )
- 16. 16 Waypoint Application ServerMobile Client RESTful Service scavenger.com/waypoints?lat=40.87&lon=-73.87&max=100 HTTP GET
- 17. 17 Waypoint Application Server DatabaseMobile Client RESTful Service scavenger.com/waypoints?lat=40.87&lon=-73.87&max=100 HTTP GET
- 18. 18 Waypoint Application Server DatabaseMobile Client RESTful Service scavenger.com/waypoints?lat=40.87&lon=-73.87&max=100 HTTP GET Query { ‘$geoNear’: { ‘$geometry’: { type: "Point", coordinates: [ -174.9559, 40.6544 ] }, ‘maxDistance’: 100 }
- 19. 19 The Scavenger Hunt App Basic Requirements • Mark target points • Identify our users • Mark users’ progress during hunts
- 20. 20 The Checkpoint Document { _id: ObjectId(), user: UUID, huntId: UUID, timestamp: ISODate(), geometry: { type: "Point", coordinates: [ long, lat ] } }
- 21. 21 The Scavenger Hunt App Social Requirements • Allow users to follow one another • Allow users to exchange messages • Send users notifications
- 23. 23 User Collection { _id: UUID, name: “Bryan Reinero’, email: “bryan@mongodb.com”, pass: “dontyouwishyouknew”, description: “I am just a guy”, followers: [ “Achille”, “Jason”, “Steffan”, “Norm” ] }
- 24. 24 Social Interactions Followers Collection { follower: ‘Shemp’, followed: ‘Euripides’}, { follower:‘Shemp’, followed: ’Eratosthenes”}, { follower: “Eratosthenes’, followed: ‘Shemp’ }, … Eratosthenes Democritus Hypatia Shemp Euripides
- 25. 25 Social Interactions Eratosthenes Democritus Hypatia Shemp Euripides Followers Collection { follower: ‘Shemp’, followed: ‘Euripides’}, { follower:‘Shemp’, followed: ’Eratosthenes”}, { follower: “Eratosthenes’, followed: ‘Shemp’ }, … ! (Euripides -> Shemp )
- 26. 26 Social Interactions db.followers.find( { follower:‘Shemp’ } ); Followers Collection { follower: ‘Shemp’, followed: ‘Euripides’}, { follower:‘Shemp’, followed: ’Eratosthenes”}, { follower: “Eratosthenes’, followed: ‘Shemp’ }, …
- 27. 27 Notifications / Messaging Message { sender: “Hypatia”, recipients: [ “Democritus”, “Euripides”, “Eratosthenes” ] date: ISODate(), message: “truth is a point of view, and so is changeable” }
- 28. 28 Notifications / Messaging Message { sender: “Hypatia”, recipients: [ “Democritus”, “Euripides”, “Eratosthenes” ] date: ISODate(), message: “truth is a point of view, and so is changeable” } db.messages.find( { recipients: “Democritus”} );
- 29. 29 OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX Notifications / Messaging db.messages.find( ‘outbox.user’: ‘Hypatia’ ); db.messages.find( ‘outbox.user’: ‘Euripides’); db.messages.find( ‘outbox.user’: ‘Democritus’); db.messages.find( ‘outbox.user’: ‘Shemp’); Read
- 30. 30 OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX Notifications / Messaging db.messages.find( ‘outbox.user’: ‘Hypatia’ ); db.messages.find( ‘outbox.user’: ‘Euripides’); db.messages.find( ‘outbox.user’: ‘Democritus’); db.messages.find( ‘outbox.user’: ‘Shemp’); Read
- 31. 31 OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX Notifications / Messaging db.messages.find( ‘outbox.user’: ‘Hypatia’ ); db.messages.find( ‘outbox.user’: ‘Euripides’); db.messages.find( ‘outbox.user’: ‘Democritus’); db.messages.find( ‘outbox.user’: ‘Shemp’); Read
- 32. 32 OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX OUTBOX Notifications / Messaging db.messages.find( ‘outbox.user’: ‘Hypatia’ ); db.messages.find( ‘outbox.user’: ‘Euripides’); db.messages.find( ‘outbox.user’: ‘Democritus’); db.messages.find( ‘outbox.user’: ‘Shemp’); Read
- 33. 33 One Document per Message per Recipient { sender: “Hypatia”, recipient: “Democritus”, date: ISODate(), message: “truth is a point of view, and so is changeable” } { sender: “Hypatia”, recipient: “Euripides”, date: ISODate(), message: “truth is a point of view, and so is changeable” } { sender: “Hypatia”, recipient: “Eratosthenes”, date: ISODate(), message: “truth is a point of view, and so is changeable” }
- 35. 35 Notifications / Messaging {user: “Hypatia”, ctime: ISODate(), mtime: ISODate(), count: 10, inbox: [ <message>, <message>, <message>, … ] }
- 36. 36 Write to Bucket function addToBucket( user, item,bucketSize ) { var query = { user: user, count: { $lt: bucketSize } }; db.notifications.update( query, { $push: { messages: item }, $set: { mtime: ISODate() }, $inc: { count: 1 }, $setOnInsert: { startDate: ISODate() } }, { upsert: true } ); }
- 37. 37 Write to Bucket Parameters • user bucket owner • item notification message • bucketSize limits number of messages / document function addToBucket( user, item, bucketSize ) { var query = { user: user, count: { $lt: bucketSize } }; db.notifications.update( query, { $push: { messages: item }, $set: { mtime: ISODate() }, $inc: { count: 1 }, $setOnInsert: { startDate: ISODate() } }, { upsert: true } ); }
- 38. 38 Write to Bucket Parameters • user bucket owner • item notification message • bucketSize limits number of messages / document Query Don’t update full bucket function addToBucket( user, item,bucketSize ) { var query = { user: user, count: { $lt: bucketSize } }; db.notifications.update( query, { $push: { messages: item }, $set: { mtime: ISODate() }, $inc: { count: 1 }, $setOnInsert: { startDate: ISODate() } }, { upsert: true } ); }
- 39. 39 Write to Bucket Parameters • user bucket owner • item notification message • bucketSize limits number of messages / document Query Don’t update full bucket Update • Append item to message array, • Update the mtime with current timestamp • Increment the size of the bucket function addToBucket( user, item,bucketSize ) { var query = { user: user, count: { $lt: bucketSize } }; db.notifications.update( query, { $push: { messages: item }, $set: { mtime: ISODate() }, $inc: { count: 1 }, $setOnInsert: { startDate: ISODate() } }, { upsert: true } ); }
- 40. 40 Write to Bucket Parameters • user bucket owner • item notification message • bucketSize limits number of messages / document Query Don’t update full bucket Update • Append item to message array, • Update the mtime with current timestamp • Increment the size of the bucket Upsert Create a new bucket function addToBucket( user, item,bucketSize ) { var query = { user: user, count: { $lt: bucketSize } }; db.notifications.update( query, { $push: { messages: item }, $set: { mtime: ISODate() }, $inc: { count: 1 }, $setOnInsert: { startDate: ISODate() } }, { upsert: true } ); }
- 41. 41 Personal Timeline / Hotlist { _id: UUID, user: ”Democritus", hotList" : [ { message: "New scavenger hunt tomorrow!", url: "http://bit.ly/1hKn9ff", date" : ISODate() }, { message: "Get 50% off at Toga City", url: "http://bit.ly/1KnlFHQ", date: ISODate() } ], atime: ISODate("20150313T04:38:43.606Z") }
- 42. 42 Personal Timeline / Hotlist Notifications of highest user relevance { _id: UUID, user: ”Democritus", hotList" : [ { message: "New scavenger hunt tomorrow!", url: "http://bit.ly/1hKn9ff", date" : ISODate() }, { message: "Get 50% off at Toga City", url: "http://bit.ly/1KnlFHQ", date: ISODate() } ], atime: ISODate("20150313T04:38:43.606Z") }
- 43. 43 Personal Timeline / Hotlist db.user.update( {"user" : "Democritus"}, {$push : { ”hotList” : { $each : [ { <MESSAGE> } ], $slice : -50 } }}, false, false)
- 44. 44 Production Ready Architecture Application Servers Replica SetMobile Client L.B.
- 45. Thanks! { name: ‘Bryan Reinero’, title: ‘Developer Advocate’, twitter: ‘@blimpyacht’, code: ‘github.com/breinero’ email: ‘bryan@mongdb.com’ }