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![The$write$architecture
Service |
|
[event payload] |
|
Service --- Queue System <------------> API -> MongoDB
/ |
/ [event payload] |
/ |
Service |](https://image.slidesharecdn.com/eventsourcingwithphpandmongodb-141121085528-conversion-gate02/85/Eventsourcing-with-PHP-and-MongoDB-62-320.jpg)
![Sequen&al)projector)(1)
Divides'the'stream'of'events'into'batches,'filters'events'by'type'
and'pass'those'of'interest'to'the'mapper'
[]->[x]->[]->[x]->[]->[]->[]->[]
|--------------| |------------|
|
|
|
|
---> Projector](https://image.slidesharecdn.com/eventsourcingwithphpandmongodb-141121085528-conversion-gate02/85/Eventsourcing-with-PHP-and-MongoDB-76-320.jpg)
![Event&Mapper&(2)
Input&Event:&
user-registered
Output:
$output = [
'user_id' => 123, // simply copied
'user_name' => 'flash', // simply copied
'email' => 'a-dummy-email@gmail.com', // simply copied
'registered_at' => "2014-21-11T00:00:01Z" // From the data.meta.created_at event field
];](https://image.slidesharecdn.com/eventsourcingwithphpandmongodb-141121085528-conversion-gate02/85/Eventsourcing-with-PHP-and-MongoDB-79-320.jpg)
![Event&Mapper&(3)
Input&Event:&
user-purchased
Output:
$output = [
'user_id' => 123, // simply copied
'email' => 'a-dummy-email@gmail.com', // simply copied
'purchased_at': "2014-21-11T00:10:01Z" // From the data.meta.created_at event field
];](https://image.slidesharecdn.com/eventsourcingwithphpandmongodb-141121085528-conversion-gate02/85/Eventsourcing-with-PHP-and-MongoDB-80-320.jpg)
![The$aggrega(on$(1)$.$Total$registered$users
var registered = db.users_conversion_rate_projection.aggregate([
{
$match: {
"registered_at": { $gte: ISODate("2015-11-21"), $lte: ISODate("2015-11-22") }
}
},
{
$group: {
_id: { },
count: { $sum:1 }
}
}
]);](https://image.slidesharecdn.com/eventsourcingwithphpandmongodb-141121085528-conversion-gate02/85/Eventsourcing-with-PHP-and-MongoDB-88-320.jpg)
![The$aggrega(on$(2)$.$Users$with$a$purchase
var purchased = db.users_conversion_rate_projection.aggregate([
{
$match: {
"registered_at": { $gte: ISODate("2015-11-21"), $lte: ISODate("2015-11-22") },
"purchased_at": { $exists: true }
}
},
{
$group: {
_id: { },
count: { $sum:1 }
}
}
]);](https://image.slidesharecdn.com/eventsourcingwithphpandmongodb-141121085528-conversion-gate02/85/Eventsourcing-with-PHP-and-MongoDB-89-320.jpg)
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Uploaded byJacopo Nardiello
Eventsourcing with PHP and MongoDB
The document discusses the challenges of event sourcing and data management using PHP and MongoDB, particularly in the context of a mobile payments platform. It emphasizes the importance of capturing every state change as events, while addressing issues related to legacy systems, data consistency, and the complexity of querying across distributed systems. Solutions such as using event stores, proper indexing, and creating projections are highlighted as ways to effectively manage and utilize event data.
![[MongoDB.local Bengaluru 2018] Just in Time Validation with JSON Schema](https://cdn.slidesharecdn.com/ss_thumbnails/1240-justintimeschemavalidationdinesh-180425155701-thumbnail.jpg?width=640&height=640&fit=bounds)
