biztalk orchestrations

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BizTalkOrchestrationsBy John Charles Olamendy February 06, 2009In this article, I will cover one important component of Microsoft BizTalk Server, the orchestrations. Basically anorchestration is the executable code to run a workflow supporting a business process. Orchestration interacts withoutsideentitiesby usingthe ports. All these things together are a powerfultool to perform processautomation.

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IntroductionIn this article, I will cover one important corrponent of Microsoft BizTalk Server, the orchestrations. Basically anorchestration is the executable code to run a workflow supporting a business process. Orchestration interacts withoutside entities by using the ports. All these things together are a powerful tool to perfonmprocess automation.What is an orchestration?Anorchestration is the executable irrplementation of a business process, that is, a logical and chronological set ofactivities inorder to achieve a goal. In order to interact with systems and applications outside the boundaries of theorchestration, you can use send and receive ports. Orchestration allows modeling the business process visually and it isthe primary mechanism to automate the process within a solution. They are created inVisual Studio and cormlled into.NETassemblies that are deployed in the Global Assembly Cache and registered in the BizTalkManagement database.

The tool used to define the orchestration is BizTalk Orchestration Designerwhich presents a visual developmentenvironment for specifying the process flow separately from the implementation of the individual activities intheprocess. It is possible to link each activity with its irrplementation on representing the interaction with an application ora system that isextemal to the orchestration itself.Orchestrations are executed by the BizTalk orchestration engine which is the maestro and runtime environment thatmanagesthe life cycle of the orchestrations such as instantiation, execution, termination and migration across hostinstances aswell as schedule and monitor the interaction with external entities.The BizTalkengine consists technically by a set of SQLServer databases with stored procedures and jobs running onthe MessageBoxdatabase and Management database aswell as a set of managed assemblies which run within BizTalkhost instances. XLANGis the main language use to specify and execute the workflows.Fromthe architecture viewpoint, orchestrations are tied to the MessageBoxdatabase which receives messages fromreceive ports and dispatch messagesthrough the send ports. Each instance of the orchestrations is listening foractivitv based on the subscriotions to the underlvina orchestration definition (see Fiaure 1).

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Sel1d I ' I I t r lI M ' ~ I~I~ l ~ p ~ 1 9Figure 1Getting started with an exampleIn order to specify the workflow associated to an orchestration, we needto use the Orchestration Designer. Follow thefollowing steps to get started using orchestrations:

1. Start Visual Studio 2005.2. Create a new project by clicking File]NewlProject, selecting the BizTalk Project node in the Project Types tree,

andentering the namePurchaseOrderProj.3. Create an orchestration by clicking Projectl Add New Item and enter the namePurchaseOrderOrchestration as

shown in Figure 2.

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Figure 48. Now let 's def ine the message schema for the PurchaseOrder document by adding a XSD Schema art ifact named PurchaseOrder .xsd to the project as shown in Figure 5.

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9. Now that we've defined the schemas for information containers, right-click on the Messages node in the Orchestration Viewwindow in the Orchestration Designer andselect New Message, go to the Property window and set Identifier to PurchaseOrderMsg and MessageType to the previously created schema (see Figure 6).

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10. Next goto the Receive shape and the two Send shapes (you can see the exclamation icons onthese shapes telling that some configurations onthese shapes aremissing) and set the Message property pointing to the message PurchaseOrderMsg (see Figure7).


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< Previous I I Next> Cancel I .a13. In the Por t B inding page, select as shown in Figure 9, click Next and f inish the wizard.

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14. Drag and drop the green icon on the left sideof the Port to the green icon onthe Receiveshape to create a linkfrom the logical item inthe orchestration to thephysical world.

15. Execute the same steps from 12 to 14 to create the Send Ports, but inthe Port Bindingpageset the Port Direction option to I'll always be sending messages onthisport. After you have finished the steps, finally your orchestration should resemble Figure10.

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Biztalk orchestrations and the underlying artifacts such as xsd schemas, mappings and pipelines are hosted in .NETassemblies, and they should bevisible to BizTalk engine,thus the assemblies generated for BizTalk must bedeployed into the Global Assembly Cache (GAC). Before an assembly is deployed into the GAC,it must have a strong namewhich helps the .NETFramework uniquely identify assemblies in the GAC.Strong name requires a strong namekey generated by the tool sn.exe which is part of the .NETFramework SDK.In order to generate a strong name using the sn.exe tool for your solution, dothe following steps:1. Opena command window and goto the solution directory.2. Execute the command sn -k PurchaseOrderProj.snk as Figure 11.


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Figure 11Now let's assign these key pairs to the project, build and deploy the solution by doing the following steps:1. Openthe Property Pages for the project by clicking on PurchaseOrderProj Properties.2. Select the COlTTTlOnropertiesIAssembly node inthe left paneand inthe right paneset the property Assembly KeyFile to the path of the file with the generated key

pairs as shown in Figure 12.

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Figure 133. Click Receive Locations tab, and New button to add a new location by clicking on the New button. Set PurchaseOrder_FS_RLas the nameof the location, and change

the Type setting inthe Transport area to File. You can also configure the pipeline to use. Set the pipeline:XMLReceive because no document processing is required (see Figure 14).

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Figure 144. Click onthe Configure button to set the directory where the documents are received from (see Figure 15).

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Figure 155. ClickOKto complete the configuration.6. Now let's start the Receive Location by navigating to the Receive Location nodes and right-click on the newly created Receive Location and selecting the Enableoption(see Figure 16).

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Figure 16Now, you need to create two physicalsend ports.

1. Right-click the Send Ports and select NewlStatic One-way Send Port.2. Change the port name to SendPO_2Warehouse_SP.


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3. Changethe Transport Type setting to File, and click the Configure button. Click on Browsebutton to find the output directory. Set the pipelineto XMLTransnit.4. Leave the default output file and the final configuration is shown in Figure 17.

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Figure 175. In order to start the port by right-click onthe newly created port and select Start option (see Figure 18).


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Figure 186. Do the same steps to create the Send Portfor the Financial System.

Once you have created all the necessary ports for the input and outputs of your physical messages, it istime to bindthem to the orchestration.1. Click on the orchestration PurchaseOrderProj.PurchaseOrderOrchestration select Properties.2. In the Properties window, click on the Bindingoptions.3. Change the Host setting to BiztalkServerApplication.4. Change the bindingas shown in Figure 19.

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Figure 195. Right-click on the orchestration and select Start.

Conclusion

Now you can test the solution by copying an XML document with structure defined by the schema inside the input folder and wait the response of the process in theoutput folders.

In this ar ticle, I covered principles of the orchestrat ions as wel l as I i llust rated how to create and run a simple orchestration using the Orchestration Designer shipped wi thVisual Studio.

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About the author

lohn Charles OlamendyHe's a senior Integration Solutions Architect and Consultant. Hisprimary area ofinvolvement is in Object-Oriented Analysis and Design, Database design,Enterprise Application Integration, Unified Modeling Language, Design Patterns andSoftware Development Process. Hehas knowledge and extensive experience inthe development of Enterprise Applications using Microsoft.NET and J2EEtechnologies and standards. Heis proflclent with distributed systems programming;and business-process integration and messaging using the principles of theServices Oriented Architecture (SOA) and related technologies such as MicrosoftBizTalk Server, Web Services (Wndows Communication Foundation, WSE, BEAWebLogic, Oracle ASand Axis) through multiple implementations of loosely-coupled system. He's a prolific blogger contributing to .NETand J2EEcommunitiesand actively writes articles on subjects relating to integration of applications,business intelligence, and enterprise applications development. Heholds a Master'sdegree in Business Informatics at Otto Von Guericke University, Magdeburg,Germany. Hewas recently awarded as MVP.Hecurrently works inthetelecommunication industry and delivers integration solutions for this industry. Heharbors a true nasslon for the technoloav.

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Commentsoutput fieby carlosOn lune 12,2009u se t he n e xt x m l f il e< F u I iN a m e > B e n ja m in B u t t o n < A d d re s s >B e n ja m i n F r an k l in < / A d d re s s>

55b u t t h er es n o t a n y f il e i n o u p ut f ol de rs . w h y? ?r ve t ri ed a n ot he rs e xa m pl es too.

Orchestration to Orchestration byAjyukOnMay21,2010I'm s tu ck u p w it h a s ce na rio i n w h ic h t he o utp ut o f a n O rc he st ra ti on s ho uld be u se d a s t he i np ut o f a no th er O rc he str at io n. A p os sib le o pti on c an be s en din g th e o utp ut o f t he f ir stO r c h es t ra ti o n i n to a f ol e r a n d c o n su m i n g i t i n t h e s e co n d O r c h es t ra t io n . Is t he re a n y o t h er o pt io n s i n w h i ch w e c an h a ve c om m u n ic at io n b e tw e en t w o O r ch e st ra ti on s ?1Iiol~~o: .II. iI PI"hplnlll


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Than x ...

Re: Orchestration to Orchestration by tahir On May26, 2010P l ea s e v e r if y n a m e sp a ce i n y ou r X M L d o cu m e nt .S am p le x m l i s g i ve n b e lo w .

Tahir AkramPemnolce Pines,R. 33332

testOO1SOO

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