DEV11: Leveraging ProDataSets in an Open Environment

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DEV-11 Leveraging ProDataSets in an Open
Environment
Robin Brown
Principal Software Engineer
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Progress DataSets

• Business Objects
• Logical grouping of related data
• In-memory cache of data
• Data source separate from DataSet
• Data abstraction

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ProDataSets in the OpenEdge Reference
Architecture
ABL Client Progress ProDataSet
.NET Open Client ADO.NET DataSet
AppServer ABL Progress ProDataSet
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ProDataSets in the OpenEdge Reference
Architecture
AppServer ABL Progress ProDataSet
ABL to Database Progress DataSet
(XML)
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ProDataSets in the OpenEdge Reference
Architecture
.NET Open Client ADO.NET DataSet
This Sessions Focus
Java Open Client Java SDO
ABL READ-XML ( ) WRITE-XML( ) Progress DataSet
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Agenda

• Overview of ProDataSet and OpenClient
• .NET OpenClient / DataSet
• Java OpenClient / SDO
• ProDataSets to/from XML

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Progress DataSets Defined

• One or more Temp-Table buffers
• Default or user-defined
• Relationships defined between tables
• Field-mapping
• Custnum ?? Cust_num
• Pass as parameters
• Local
• APPEND option
• BY-REFERENCE option
• Remote

ProDataSet
Temp-Table
Fields
Indexes
Temp-Table
Data-Relations
Fields
Indexes
Temp-Table
Fields
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Open Client and ProxyGen
App Object
Proc Object
ABL Business Logic (r-code)
Sub- AppObj
Web Services Mapping file (.wsm)
Java Proxy Code
.NET Proxy Code
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10.1A - OpenAPI
NEW!

• Run arbitrary procedure on AppServer without
  proxy
• New Classes
• Progress.Open4GL.Proxy. (.Net)
• com.progress.open4gl.javaproxy. (Java)

OpenProcObject
OpenAppObject
ParamArray
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Open Client Architecture
.NET / Java Client
OpenEdge AppServer
Client App
Proxy
Internet /Intranet
Open Client Runtime
App Object
AppServer
Proc Object
Proc Object
HTTP/S
Sub- AppObj
Name Server
Database Server
.Net Framework / JRE
Communication Protocol
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Agenda

• Overview of ProDataSet and OpenClient
• .NET OpenClient / DataSet
• Java OpenClient / SDO
• ProDataSets to/from XML

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ADO.NET DataSets Defined
ADO.NET DataSet

• One or more DataTables
• DataColumns define fields
• DataConstraints define integrity rules
• Relationships defined between tables
• Map fields between tables
• Share many features of ProDataSet

DataTable
DataColumns
DataConstraint
DataTable
DataRelations
DataColumns
DataConstraint
DataTable
DataColumns
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Mapping ProDataSets to .Net DataSets
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10.1A Completes the ABL-.Net Mapping
NEW!

• INITIAL Value
• XML attributes
• UNDO
• DATA-SOURCE-MODIFIED
• REJECTED

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Using ProDataSets in a .NET Open Client
environment
DataSets on both ends of the wire
AppServer
.Net Client
4GL Business Logic
.Net User Interface
Progress DataSet
ADO .Net DataSet
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Passing DataSets in .Net
Static versus Dynamic
Progress AppServer
.NET Client
Static
.Net Typed DataSet
Static DataSet
Data Only
Dynamic
Schema Data
ADO .Net DataSet
Dynamic DataSet
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Procedure using Static ProDataSet
ABL code
/ StaticDs.p / dsOrderDef.i DEF INPUT
PARAMETER piGE AS INT. DEF INPUT PARAMETER piLE
AS INT. DEF OUTPUT PARAMETER DATASET FOR
dsOrder. DATA-SOURCE srcOrdFILL-WHERE-STRING
WHERE Order.OrderNum GE STRING(piGE)
AND Order.OrderNum LE STRING(piLE). /
Fill the dsOrder DataSet / DATASET
dsOrderFILL().
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Method using Static .Net DataSet
.NET C code
using nsOrderDS.StrongTypesNS dsOrderDataSet
dsOrders try appObj.StaticDS
(iLowRange, iHighRange, out dsOrders) ...
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Agenda

• Overview of ProDataSet and OpenClient
• .NET OpenClient / DataSet
• Java OpenClient / SDO
• ProDataSets to/from XML

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Overview Java Service Data Objects (SDO)
Java Specification Request (JSR) 235

• Technical description of Java SDOs published by
  BEA and IBM
• Java SDO Technology (JSR 235)
• http//jcp.org/en/jsr/detail?id235
• Reference Implementation
• Eclipse Modeling Framework (EMF 2.0.1)
• http//www.eclipse.org/emf/sdo.php

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Java SDO Objects

• DataObject
• Disconnected view of structured data
• Holds data as a set of properties
• Relational data
• Reference to another DataObject
• DataGraph
• Graph (or tree) of DataObjects
• Single root DataObject
• Typical unit of transfer
• Contains a ChangeSummary object

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Java SDO Objects (contd)

• ChangeSummary
• Captures changes from all DataObjects in a
  DataGraph
• Applied back to data source using Data Mediator
  Service
• Data Mediator Service NOT needed
• Data sent to/from the OpenEdge AppServer

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Java SDO Implementation Issues

• Limitations of Java SDO design
• Relationship support
• No meta data to describe relationship
• No GregorianCalendar support
• Needed to map to DATETIME(-TZ) fields
• Inefficient access to DataGraph changes
• Need changes-only DataGraph for AppServer

ProDataGraph implementation overcomes limitations
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Primary Progress Classes (extensions)
Java classes - com.progress.open4gl.

• ProDataGraph
• Extends Java SDO DataGraph
• ProDataGraphMetaData
• Specifies the ProDataGraph meta data
• ProDataObject
• Extends Java SDO DataObject
• ProDataObjectMetaData
• Specifies the ProDataObject meta data
• ProChangeSummary
• Extends Java SDO ChangeSummary
• ProDataRelationMetaData
• Resolves missing relational metadata support

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Mapping ProDataSets to Java SDOs
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Passing DataSet Parameters in Java
Same for Static AND Dynamic
OUTPUT
INPUT-OUTPUT
INPUT
ProDataGraphHolder
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Procedure using Static ProDataSet
ABL code
/ StaticDs.p / dsOrderDef.i DEF INPUT
PARAMETER piGE AS INT. DEF INPUT PARAMETER piLE
AS INT. DEF OUTPUT PARAMETER DATASET FOR
dsOrder. DATA-SOURCE srcOrdFILL-WHERE-STRING
WHERE Order.OrderNum GE STRING(piGE)
AND Order.OrderNum LE STRING(piLE). /
Fill the dsOrder DataSet / DATASET
dsOrderFILL().
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Method using ProDataGraph
Java Client code
import com.progress.open4gl. import
commonj.sdo. ProDataGraphHolder dgHolder
new ProDataGraphHolder() ProDataGraph dg
null try appObj.StaticDS
(iLowRange, iHighRange, dgHolder) dg
dgHolder.getProDataGraphValue() List rows
dg.getProDataObjects(Order") ...
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Updating a DataSet

• ProChangeSummary object tracks changes
• Works similar to ProDataSet
• Tracks modified, added, deleted rows
• Keeps track of original versions

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Demo
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Temp-Table Parameters
Cannot mix ProDataGraph and java.sql.ResultSet
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New .jar files for CLASSPATH
Location ltinstall-dirgt/java/ext/

• SDO jar files
• common.jar
• commonj.sdo.jar
• ecore.jar
• ecore.change.jar
• ecore.resources.jar
• ecore.sdo.jar
• ecore.xml.jar

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Agenda

• Overview of ProDataSet and OpenClient
• .NET OpenClient / DataSet
• Java OpenClient / SDO
• ProDataSets to/from XML

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ProDataSets in the OpenEdge Reference
Architecture
NEW!
ABL READ-XML ( ) WRITE-XML( ) Progress DataSet
(XML)
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New Methods Added
ProDataSet

• WRITE-XML
• WRITE-XMLSCHEMA
• READ-XML
• READ-XMLSCHEMA

• Methods apply to
• ProDataSet
• Temp-Table
• Temp-Table Buffer

.xsd
.xml
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WRITE-XML ( )
Syntax
WRITE-XML (target-type, file stream memptr
handle longchar , formatted , encoding
, schema-location, , write-xml schema ,
min-xmlschema, write-before-image)
Example
DEFINE DATASET dsOrder... / attach datasources
and FILL / DATASET dsOrderWRITE-XML ("FILE",
dsOrder.xml",
TRUE). / formatted /
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ProDataSet XML Example
Order Row
OrderLine Row
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NESTED Attribute ProDataSet Data-Relation
Example
DEFINE DATASET dsOrder FOR eOrder,eOrderLine
DATA-RELATION OrderLine FOR eOrder,eOrderLine
RELATION-FIELDS (OrderNum,OrderNum) NESTED.
/ attach datasources and FILL / DATASET
dsOrderWRITE-XML ("FILE",
dsOrderNested.xml",
TRUE). / formatted /
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NESTED Attribute ProDataSet Data-Relation
OrderLine Records NESTED within Orders
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READ-XML ( )
Syntax
READ-XML (source-type, file memptr handle
longchar , read-mode, schema-location ,
override-default-mapping , field-type-mapping
, verify-schema-mode )
Example
DEFINE DATASET dsOrder... DATASET
dsOrderREAD-XML (FILE,
dsOrder.xml, / file /
EMPTY, / read-mode /
?, ?).
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Reading XML Into A ProDataSet
READ-XML ( )

• Reads XML containing Before-Image information
• Progress datasetChanges
• Microsoft Diffgram
• ProDataSet events DO NOT fire
• Change tracking is turned OFF

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WRITE-XMLSCHEMA ( )
Syntax
WRITE-XMLSCHEMA (target-type, file stream
memptr handle longchar , formatted ,
encoding , min-xmlschema )

• min-xmlschema
• if TRUE only write standard XML Schema structures
• if FALSE, add XML Schema extensions from
  prodata namespace
• Progress-specific information
• Allows round-trip of Progress definition

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Progress XML Schema Extensions
MIN-SCHEMA TRUE

MIN-SCHEMA FALSE
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Progress XML Schema Extensions
prodata namespace
field-level attributes
non-unique index definition
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XML Schema to ABL Tool
Syntax
xsdto4gl xml-schema-filename -output
output-directory-name filename -element
element-name -overridemapping
-fieldtypemapping field-mapping-file string

.i
.xsd
xsdto4gl
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In Summary

• The ProDataSet is key to the future of ABL
  applications
• Major component of the OpenEdge Reference
  Architecture
• Were continuing to expand ProDataSet features

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Relevant Exchange Sessions

• DEV-9 Using the ProDataSet in OpenEdge 10
• DEV-15 XML in OpenEdge Past, Present and Future

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Education / Documentation References

• Course
• Using ProDataSets
• What's New in OpenEdge 10.1 SOA Support
• Documentation
• OpenEdge Development ProDataSets
• OpenEdge Development .Net Open Clients
• OpenEdge Development Java Open Clients
• OpenEdge Development Programming Interfaces (XML)

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Questions?
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Thank you foryour time
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