General

Question 1

Some benefits of ERP-NAV web services

Answer 1

1. very simple to publish
2. provides managed access to ERP-NAV data while respecting and enforcing NAV rules, logic and design that already exists
3. uses windows authn and respects NAV data constraints
4. supports SOAP interface (cannot access query objects) and OData interface (cannot access codeunit objects)

Question 2

Some disadvantages of ERP-NAV web services

Answer 2

1. allowing access to system from the web requires more security
2. ERP-NAV objects that re published need to be customized
3. access from web complicates admin’s job of managing loads on the system

Question 3

Factors to be considered in judging ws integration

Answer 3

1. What is degree to which functionality of standard ERP interface is needed? A web service application should be used for limited, focused functionality
2. What is amount of data to be exchanged? A web service application should be used for low data volume applications
3. How public is user set? Web services should be used in intranet

Question 4

Legoblok voorstelling service

Answer 4

• biedt functionaliteit
• gestandaardiseerde interface
• autonoom
• loosely coupled
• reusable
• composable

Question 5

Loose coupling van service

Answer 5

=> zo weinig mogelijk afhankelijkheden aan andere services

• flexibiliteit (aanpasbaar zonder andere services te beinvloeden)
• schaalbaarheid (vermijd bottle necks)
• fout tolerantie (risico op system failures is beperkt)

Question 6

ESB

Answer 6

Enterprise service bus

• bemiddeling
• standaardisatie
• transformatie
• orchestratie
• monitoring
• logging
• security

Question 7

Functionele voordelen ESB

Answer 7

• Validation van inkomende berichten op content/context
• Enrichment (extra data toevoegen aan bericht)
• Transformation (bericht type veranderen naar ander type of standaard type)
• Routing van berichten op basis van content/context
• Operate: oplossingen om connectiviteit te voorzien naar target systeem en ondersteuning van protocollen

Question 8

Niet-functionele voordelen ESB

Answer 8

• Security
• Monitoring voor errors
• Reliability: asynchrone communicatie tussen source en targets
• Message throttling: ESB kan load wegnemen van bepaalde targets

Question 9

Eigenschappen microservices

Answer 9

• fine-grained -> loosely coupled + independent
• indeling rond business capabilities
• asynchroon
• lightweight protocols
• smart endpoints
• dumb pipes
• producten (geen projecten)

Question 10

Waarom microservice architecture

Answer 10

• scaling -> on demand + independent
• decentralization (hoe 200 mensen samenwerken)
• agility (lage time to market)

Question 11

Voordelen microservice

Answer 11

• modulariteit-> loosely coupled + onafhankelijke deployment
• diverse technologiën (service kan kiezen)
• scalability
• agility

Question 12

Nadelen microservice

Answer 12

• gedistribueerd systeem

- operationele complexiteit

Question 13

3 standard page operations

Answer 13

1. create: create single record
   - void Create(Entity entity)
2. delete: delete single record
   - bool Delete(string key)
3. read: read single record
   - Entity Read(string no)

Question 14

3 operations for exposing web services

Answer 14

1. create: create single record (INSERT)
2. update: update single record (MODIFY)
3. delete: delete single record