from specs to app 10x faster using reactive programming
DESCRIPTION
Webinar - how to build mobile, web and integration backends 10X faster using reactive programming. For transnational database applications generate an API in minutes, then add business rules using reactive programming. For the typical 5% of logic that remains, code the rest in server-side JavaScript.TRANSCRIPT
Espresso Logic
From Specs To App
10X Faster Using Reactive Programming
Agenda
• Current situation
• Company overview
• Reactive programming & declarative development
• Turning requirements into rules
• Extending rules and events
• Q & A
Current Situation
BusinessApplication
Requirements
ApplicationRunning in Production
With Reactive Programming
BusinessApplication
Requirements
ApplicationRunning in Production
balance < credit_limit
balance = sum (unpaid orders.amount_total)
amount_total = sum (lineitem amount)
amount = product_price * qty_ordered
product_price = copy(product.price)
Company Background
Espresso Logic
Declarative Development
• More productive – closer to the business
• Move away from converting requirements into code
Declarative Reactive Programming
subscribe()
handleEvent()
Declare ExpressionWatch
React
Observer
JavaRX
Spreadsheet
Angular
Espresso
Espresso Business Rules
• Rules applied to business entities and attributes
– Derivations
– Validations
– Events - extensibility
Rules Improve Application Quality
Aligning IT and the business
• Guaranteed Re-use
• Validate requirements
• Business users can read and understand rules
• Rules bridge users and IT
Validation
Derivation – Sum
Derivation – Formula (JavaScript)
Event - JavaScript
Solves these Use Cases…
Add Order Delete Order Add Detail Delete Detail Change Detail Qty Reselect Product ….
Balance < CreditLimitBalance = sum (Orders.AmountTotal)AmountTotal = sum (Lineitem Amount)Amount = UnitPrice * QuantityUnitPrice = copy(UnitPrice)1
1
2
2
3
3
4
4
10X Faster? Seriously.
Espresso Metrics
•Rules cover 95+% of complex business cases
•40X expressive power Approach Metrics
Java 480
Triggers 220
Logic 5
Rules + JavaScript Events for the last 5%
Business Agility – Maintenance is Key
• Avoid the archaeology of maintenance
• Just change rules
– Re-ordered
– Re-optimized
Challenges to Address
Complexity
• Performance
– Single row adjustments
– Pruning
• Transparency
– Rule logging / trace
– Debugger
Demo
Summary
• With Espresso reactive programming you can
– Reduce Time to Market
– Accelerate maintenance
– Improve application quality
Next Step
PROOF
Work with Espresso to arrange a
charge proof-of-concept
with your data
No charge
