David Abdala

Nómade Soft SRL

OERA in practice: NSRA Workshop

OERA in practice: NSRA

Background Theory Common Infrastructure Layer Exercises Writing applications Do it!

OERA in practice: NSRA

Goals of the framework Storage independent Oriented to services Applications common requirements already solved

Report generation / retrieval / printing Background execution Security Global data filters

Familiar to ABL programmers Low migration impact

OERA in practice: NSRA

Background Theory Common Infrastructure Layer Exercises Writing applications Do it!

OERA in practice: NSRA

Theory Layers

Design time VS runtime

Data entity VS business entity PDS role and TMTT issue

OERA in practice: NSRA

Layers Design time VS runtime

OERA in practice: NSRA

Data entity VS business entity

OERA in practice: NSRA

PDS role and TMTT issue ProDataSet role

Is the “glue” of the Data Entity, inside the Business Entity.

Used by proDataSource for filling and saving.

Never destroyed. Has as many

business objects instances as

required simultaneously

Searches for an unused instance. If

none available a new one is

instantiated.

Once finished, the requested objects

are “returned” to the broker.

OERA in practice: NSRA

PDS role and TMTT issue Too Many TempTables issue

Requests a business object to the object

broker.

Searches for the factory of the

requested object. If not available instantiates it.

Has as many factories as different business objects had

been instantiated

Usually never destroyed, reused in

every service request.

OERA in practice: NSRA

Background Theory Common Infastructure Layer Exercises Writing applications Do it!

OERA in practice: NSRA

Common Infrastructure Layer Background Manager Context Manager Expression Parser Report Manager Security Manager Service Manager Session Manager Template Parser

OERA in practice: NSRA

Background Theory Common Infrastructure Layer Exercises Writing applications Do it!

OERA in practice: NSRA

BI BE BPOMI ME MPOCI CE CPO

Level \ P.space Items Employee Purchase OrderBasicMediumComplex

For people with no OO knowledge the Basic row is best (BI,BE,BPO).

For people with little OO knowledge the reverse diagonal is best (BPO,ME,CI).

People with good OO knowledge should be ok with the main diagonal (BI, ME, CPO).

People that likes to suffer will be happy with Complex row (CI,CE,CPO).

OERA in practice: NSRA

Background Theory Common Infrastructure Layer Exercises Writing applications Do it!

OERA in practice: NSRA

Writing Applications Defining TEMP-TABLEs Writing business entities Writing services Writing DSOs Writing the client

OERA in practice: NSRA

TEMP-TABLEsWhere to define themWhat kind of fields, with what namesHow to use them

OERA in practice: NSRA

Business Layer Define the data entity Define the business entity main class Define the business entity satellite classes

OERA in practice: NSRA

Service LayerRequired servicesService packages (.p) and service logicService configuration and security

OERA in practice: NSRA

Data Source LayerReferential integrity rulesFilling logicSaving logicCompatibility & migration

OERA in practice: NSRA

XUL clientWriting itTransformation to other clients

Now, Do It!

Nómade Soft SRLwww.NomadeSoft.com.ar/nsra

OERA in practice: NSRA Workshop