Oracle SoA Part LAB Xiii

8/13/2019 Oracle SoA Part LAB Xiii

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Business Intelligence Solution Providers

Getting Started with Oracle SOA

BASIC CONCEPT OF ORACLE SOA Lab#13

Description:

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beginners and advance learners. In the same series, we haveprepared a complete end-to end Hands-on Beginner’s Guide for

Oracle SOA. The document focuses on Flow and FlowN activities. Join our professional training program and learn from experts.

History:Version Description Change Author Publish Date0.1 Initial Draft Shiva Kant Pandey 21th Aug 20120.1 Review#1 Amit Sharma 29th Aug 2012



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ContentsParallel Processing by using FlowN activity ............................................................................................................................ 3

Flow Activity ................................................................................................................................................................ 3

FlowN Activity ............................................................................................................................................................. 3

Stepwise Procedure of Project FlowNProcess by using FlowN activity .................................................................................. 4



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Parallel Processing by using FlowN activityA BPEL process service component must sometimes gather information from multiple

asynchronous sources. Because each callback can take an undefined amount of time , it may taketoo long to call each service one at a time. By breaking the calls into a parallel flow, a BPEL processservice component can invoke multiple web services at the same time, and receive the responses asthey come in. This method is much more time efficient.So there are two Parallel Process Activities these are :

Flow Activity: The Flow activity is used to configure parallel activity in BPEL processes. Intheory, activities contained in two or more branches (sequence containers) inside a Flowactivity are executed in parallel.

FlowN Activity: The flowN activity creates multiple flows equal to the value of N, which isdefined at runtime based on the data available and logic within the process. An indexvariable increments each time a new branch is created, until the index variable reaches thevalue of N.

Simply we can say if we know number of operations to be processed in parallel then we can easilypredict the number of flows in Flow activity but if we don't have previous information of number ofoperations & so can't predict the count of flow so for this reason we need FlowN activity & hence wesimply assume number of operations is N & an index which is assigned equal to 1 & hence it askfor N number of flows to process in parallel .

NOTE: The FlowN activity creates multiple flows equal to the value of N , which is defined atruntime.



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Stepwise Procedure of Project FlowNProcess by using FlowN activityStep 1: Create new projectNew --->All Technologies--->SOA Tier --->SOA project --->OK ---> Project Name (FlowNProcess) --->ADF Business Component---> SOA--->Next

Step 2: Click Composite with BPEL Process

Step 3: Click Finish

Step 4: Fill all its blank spaces



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Name (FlowNProcess) ---->NameSpace (Leave as it is)--->Template(Select Synchronous BPELProcess)---> Service Name(FlowNService)----> mark Expose as a SOAP service --->Click Ok

Step 5: Open Composite.xml & observe BPEL Process

Step 6: Click on ParallelProcess.xsd & it is automatically generated xsd for sync bpel process.



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Rename Input Element as ProcessNumber & then add sequence ----> then sub elements i.eelement1 and Element2 now rename Element1 as NumberA & element2 as NumberB as shown innext figure.

Step 7: Open property inspector & then click on ProcessNumber , now see propery inspector &

give minOccurs = 1 & maxOccurs = unbounded then click enter now see xsd in design mode thatprocessNumber is bounded from 1 to infinite .

Step 8: Click on Schema targetNamespace & Create an additional Element & a Complex TypeElement

Step 9: Rename complex type as ProcessNumberResultType & right click on it then select sequence



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after sequence create six elements & rename them one by one as numberA ,NumberB, Addition,Subtraction , Multiplication , division respectively .

Step 10: Click on element1 & rename it as ProcessNumberResult



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Step 11: Register Namespace with Prefix fobjxmlns:fobj="http://xmlns.oracle.com/SOAApps/FlowNProcess/FlowNProcess"

Step 12: Click on ProcessNumberResult and set type as fobj:ProcessNumberResultType & then hitenter & then expand it by clicking on + sign



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Step 13:Right click on sub element "result" of processResponse & then click Toggle Reference --->rename result as fobj:ProcessNumberResult. Now we have successfully referenced ProcessNumberResult to result element .Also Give minOccurs =1 & maxOccurs = unbounded

Step 14: Click on source mode & view the xsd coding



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<?xml version="1.0" encoding="UTF-8"?><schema attributeFormDefault="unqualified" elementFormDefault="qualified"

xmlns:fobj="http://xmlns.oracle.com/SOAApps/FlowNProcess/FlowNProcess"



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targetNamespace="http://xmlns.oracle.com/SOAApps/FlowNProcess/FlowNProcess"xmlns="http://www.w3.org/2001/XMLSchema">

<element name="process"><complexType><sequence><element name="ProcessNumber" maxOccurs="unbounded"><complexType><sequence><element name="NumberA" type="integer"/><element name="NumberB" type="integer"/></sequence></complexType></element></sequence></complexType></element><element name="processResponse"><complexType><sequence>

<element maxOccurs="unbounded" ref="fobj:ProcessNumberResult"/></sequence></complexType></element><element name="ProcessNumberResult" type="fobj:ProcessNumberResultType"/><complexType name="ProcessNumberResultType"><sequence><element name="NumberA" type="integer"/><element name="NumberB" type="integer"/><element name="Addition" type="integer"/><element name="Subtraction" type="integer"/><element name="Multiplication" type="integer"/>

<element name="Division" type="decimal"/></sequence></complexType>

</schema>

Step 15: Click on FlowProcess.bpel & open bpel process



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Step 16 : Drag & drop FlowN Activity from component palette for nesting other activities on it & expand flowN

activity by clicking plus sign [+]

Step 17: Drag & drop assign activity between receive & flowN activity & rename it asAssignTempVar



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Step 18: To create global variables click on variable icon then "Variable" window will appear----> Click on Green plus ---> Create Variable window will appear ---> Name = NVar ---> click on Type ---> Click on Browse icon & choose integer type ---> ok

Step 19: Again Click on Green plus ---> Create Variable window will appear ---> Name = IndexVar ---> click on Type ---> Click on Browse icon & choose int type ---> ok



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Step 20: Now click OK

Step 21: Now double Click on AssignTempVar to open & edit it



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Step 22: Drag & drop Expression icon into NVar



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Step 23: Select BPEL XPath Extension Functions under Functions then select & click on CountNodes --> Insert Into Expressions ---> select ProcessNumber ---> Insert Into Expressionthe expression should look like this if any other thing appear delete it .ora:countNodes('inputVariable','payload',' /client:process/client:ProcessNumber')then click OK .

Step 24: Drag & drop Expression icon into IndexVar



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Step 25: Initialize IndexVar = 1

Step 26: Take overview of assigned values & then click OK



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Step 27: Drag & drop Scope Activity inside FlowN activity & expand it by clicking on + sign

On clicking + sign scope will expand as shown below :

Step 28: Drag & drop invoke activity from component palette & rename it as InvokeParallelFlow toinvoke ParallelProcessingservice



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Note : Before invoking any service we need its concrete wsdl i.e wsdl containing binding & serviceinformation also .Step 29: Open Oracle's Home ---> jdeveloper ---> mywork --->SOAApps--> ParallelProcessing--->Copy ParallelProcess.wsdl

Step 30: : Open Oracle's Home ---> jdeveloper ---> mywork --->SOAApps-->FlowNProcess ---> pasteParallelProcess.wsdl

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Step 31: Open Parallelprocess.wsdl from FlowNProcess in Text editor & make it Concrete wsdl byadding xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"& Binding , service Information from run time concrete wsdl from parallel processing inside

enterprise managercoding is shown below :

<?xml version="1.0" encoding="UTF-8"?><wsdl:definitions name="ParallelProcess"

targetNamespace="http://xmlns.oracle.com/SOAApps/ParallelProcessing/ParallelProcess"

xmlns:client="http://xmlns.oracle.com/SOAApps/ParallelProcessing/ParallelProcess"

xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/">

<wsdl:portType name="ParallelProcess"><wsdl:operation name="process"><wsdl:input message="client:ParallelProcessRequestMessage"/><wsdl:output message="client:ParallelProcessResponseMessage"/></wsdl:operation>

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</wsdl:portType>

<wsdl:binding name="ParallelProcessBinding" type="client:ParallelProcess"><soap:binding transport="http://schemas.xmlsoap.org/soap/http"/><wsdl:operation name="process"><soap:operation style="document" soapAction="process"/><wsdl:input><soap:body use="literal"/></wsdl:input><wsdl:output><soap:body use="literal"/></wsdl:output></wsdl:operation></wsdl:binding><wsdl:service name="ParallelProcessService_ep"><wsdl:port name="ParallelProcess_pt" binding="client:ParallelProcessBinding"><soap:address location="http://soabpm-vm:7001/soa-

infra/services/default/ParallelProcessing/ParallelProcessService_ep"/></wsdl:port></wsdl:service>

<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~PARTNER LINK TYPE DEFINITION~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~>

<plnk:partnerLinkType name="ParallelProcess"><plnk:role name="ParallelProcessProvider"><plnk:portType name="client:ParallelProcess"/></plnk:role></plnk:partnerLinkType>

</wsdl:definitions>Step 32: Click refresh button till concrete wsdl parallelProcess.wsdl would shown below :



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Step 35: Now we have Successfully Refrenced ParallelFlowRef now we can observe it on Partnerlinks swim lane .

Step 36: Right click on InvokeParallelFlow

Step 37: Edit Invoke Name = InvokeParallelFlow Partner Link = Browse ParallelFlowRef Operation = Process Input = Click on Green Plus & Create variable window will appear

1. Name= InvokeParallelFlow_process_Input_Variable2. Type = leave as it is3. Select local variable

Click ok



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Step 38: Similarly Output = Click on Green Plus & Create variable window will appear

4. Name= InvokeParallelFlow_process_output_Variable5. Type = leave as it is6. Select local variable

Click ok



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Step 39: look at the variable window & click ok to save the local invoke variables inside scope.

Step 40: Now we have established wiring between InvokeParallelFlow & ParallelFlowref.Click twice on AssignInvokeInput to edit it



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Step 41: Map From input Variable/payload//client:processNumber/client:numberA TOInvokeParallelFlow_process_InputVariable/payload //ns1:process/ns1:NumberAVariable/payload//client:processNumber/client:numberA TOInvokeParallelFlow_process_InputVariable/payload //ns1:process/ns1:NumberA

Step 42: Since we have N number of values of ProcessNumber hence edit FlowNProcess.bpel insource mode by writing [$IndexVar] after client:ProcessNumber as show below

<assign name="AssignInvokeInput"><copy><from variable="inputVariable" part="payload"

query="/client:process/client:ProcessNumber[$IndexVar]/client:NumberA"/><to variable="InvokeParallelFlow_process_InputVariable"

part="payload" query="/ns1:process/ns1:NumberA"/></copy><copy><from variable="inputVariable" part="payload"

query="/client:process/client:ProcessNumber[$IndexVar]/client:NumberB"/><to variable="InvokeParallelFlow_process_InputVariable"

part="payload" query="/ns1:process/ns1:NumberB"/></copy>

</assign>



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Step 43 : To create global variables click on variable icon then "Variable" window will appear----> Click on Green plus ---> Create Variable window will appear ---> Name = TempProcessNumberResult ---> click on Element ---> Click on Browse icon



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Step 44: Choose ProcessNumberResult then click OK

Step 45: Click ok

Step 46: Drag & drop Assign activity below InvokeParallelFlow from component palette & rename itas AssignTempParallelProcess then double click on it to edit it



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Step 47: Map From InvokeparallelFlow_Process_OutputVariable to TempProcessNumber

If we want to map in source mode then code is written below :<assign name="AssignTempParallelProcess">

<copy>

<from variable="InvokeParallelFlow_process_OutputVariable"part="payload" query="/ns1:processResponse/ns1:NumberA"/>

<to variable="TempProcessNumberResult"query="/client:ProcessNumberResult/client:NumberA"/>

</copy><copy><from variable="InvokeParallelFlow_process_OutputVariable"

part="payload" query="/ns1:processResponse/ns1:NumberB"/><to variable="TempProcessNumberResult"

query="/client:ProcessNumberResult/client:NumberB"/></copy><copy>

<from variable="InvokeParallelFlow_process_OutputVariable"part="payload" query="/ns1:processResponse/ns1:Addition"/>

<to variable="TempProcessNumberResult"query="/client:ProcessNumberResult/client:Addition"/>


part="payload"query="/ns1:processResponse/ns1:Subtraction"/>



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<to variable="TempProcessNumberResult"query="/client:ProcessNumberResult/client:Subtraction"/>


part="payload"query="/ns1:processResponse/ns1:Multiplication"/>

<to variable="TempProcessNumberResult"query="/client:ProcessNumberResult/client:Multiplication"/>


part="payload" query="/ns1:processResponse/ns1:Division"/><to variable="TempProcessNumberResult"

query="/client:ProcessNumberResult/client:Division"/></copy>

</assign>Step 48: Drag & drop Assign activity below AssignTempParallelProcess from component palette &rename it as AssignOutput then double click on it to edit it

Step 49:Map TempProcessNumberResult/client:ProcessNumberResult to outputVariable/payload/client:processResponse & then Append it .



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Step 50: Drag & drop Expression into IndexVar & then Click on IndexVar---> Insert IntoExpression---> +1



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Step 51: Deploy FlpowNProcess Project by right clicking on left pane on FlpowNProcess -->Deploy ---> FlpowNProcess ---> Application server --->devsoa (select server domain) -->AdminServer--->Next ---> Finish

Deployment finished

Step 52: Click On browser ---> Start Enterprise manger -----> login using credentials (username

weblogic & password : welcome1) , now click twice on FlpowNProcess [1.0] composite then Click on Test to test the composite instance



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Step 53:Select Number of node =3 & then click on Explore tab

Step 54: Fill all the required fields as input NumberA = 80 & NumberB=70 NumberA = 60 & NumberB=50 NumberA = 40 & NumberB=30



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Step 55: Click on Test Web Service

And get Response shown below:

Step 56: Now we have got three output concurrently then click on Launch Flow Trace as shownbelow :



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Step 57:Observe that all states of composite instance are completed & three times invoke activityhad called ParallelProcessReference .Click on FlowNProcess to open Flow diagram

Step 58: Click on Flow

Step 59: Observe that the index is incremented & all the three invoke activities are invoked inparallel i.e all the N flows are processing concurrently.



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Step 60: Now again open Trace & click on ParallelProcess & view its Flow diagram.

Step 61: Click on Flow & observe ParallelProcess Flow that all the operations are also processingsimultaneously & concurrently

Step 62: Open FlowProcess dashboard & click on Shut Down tab to shutdown composite instance



Step 63: Click Yes

Now successfully Shutdown the composite

Finally logout Enterprise Manager & stop admin server .

Oracle SoA Part LAB Xiii

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