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SoftwareAG webMethods Designer Introduction
- 1. Agenda Designer Overview Flow Services Document types Mapping Java Services Invoking Services (Run, Trace, Step) Messaging, Triggers Specification Schema JDBC Adapter (Adapter Service, Adapter Notification) Flat File Handling - 1 - 1
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- 3. 3 Designer Overview • WebMethodsDesigner is a eclipse based IDE development tool that you use to build, edit, and test integration logic. • Construct integration logic with an easy‐to‐use implementation language called the webMethods flow language • Designer also has extensive data transformation and mapping capabilities that allow you to quickly drag‐and‐drop data fields from one step to the next.
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- 5. 5 Designer Main Window NavigationElements Editor Window Properties window
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- 9. 9 Switching perspectives ServiceDevelopment Perspective - that contains the views, editors, and tabs needed to build services and other supporting elements Debug Perspective -When you debug a service, use the Debug perspective. The Debug perspective contains various views for helping you debug your service Process Development Perspective
- 10. 10 Elements An element isan item that exists in the Navigation panel in webMethods Designer. Elements include folders, services, specifications, IS document types, triggers, and IS schemas.
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- 12. 12 Flow Services •A flowservice is a service that is written in the webMethods flow language. •This simple yet powerful language lets you encapsulate a sequence of services within a single service and manage the flow of data among them. •Locking and Unlocking: •A lock on an element prevents another user from editing that element. When an element is locked by you, you have a user lock. The element is read‐only to all other users on the Integration Server. Another user cannot edit the element until you unlock it.
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- 14. The INVOKE flowstep invokes another service. You can use it to invoke any type of service, including another flow service. Invoke Step 14
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- 16. LOOP STEP The LOOPstep takes as input an array variable that is in the pipeline. It loops over the members of an input array, executing its child steps each time through the loop 16
- 17. 17 Repeat STEP •The REPEATstep repeatedly executes its child steps up to a maximum number of times that you specify. It determines whether to re‐execute the child steps based on a Repeat on condition. You can set the repeat condition to one of the following: •Repeat if any one of the child steps fails. •Repeat if all of the elements succeed.
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- 19. 19 BRANCH •The BRANCH stepselects and executes a child step based on the value of one or more variables in the pipeline. You indicate the variables you want to branch on by specifying a switch value or by writing an expression that includes the variables. Branching on a Switch Value When you branch on a switch value, you specify the switch variable in the Switch property of the BRANCH step. In the Label property for each child step, you specify the value of the switch variable that will cause that child step to execute. At run time, the BRANCH flow step executes the child step that has the same label as the value of the Switch property. Branching on Expressions When you branch on expressions, you set the Evaluate labels property of the BRANCH step to true. In the Label property for each child step, you write an expression that includes one or more variables. At run time, the BRANCH step executes the first child step with an expression that evaluates to true.
- 20. 20 Exit Step The EXITstep exits the entire flow service or a single flow step. Specifically, it may exit from the nearest ancestor loop step, or the entire flow service. The EXIT step can throw an exception if the exit is considered a failure. When an exception is thrown, user‐specified error message text is displayed by typing it directly or by assigning it to a variable in the pipeline.
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- 22. 22 Document Type •An ISdocument type contains a set of fields used to define the structure and type of data in a document (IData object). You can use an IS document type to specify input or output parameters for a service You can create an IS document type in the following ways: • Create an empty IS document type and define the structure of the document type yourself by inserting fields. •Create an IS document type from a source file, such as an XML Schema, DTD, or XML document. The structure and content of the IS document type will match that of the source file. • Create an IS document type from a Broker document type.
- 23. 23 Modifiers (Mapping) Link apipeline variable to a service variable. The Link modifier lets you resolve variable‐name and data‐structure differences by “linking” (copying) the value of one variable to another at run time. Drop a variable from the pipeline. The Drop modifier removes extraneous variables from the pipeline Assign a value to a variable. The Set Value modifier “hard codes” a value for a variable
- 24. 24 Java Services When youbuild a Java service, you type (or paste) your code in the text box in the Java service editor and run the java service to see the outputs.
- 25. 25 Running Services •You canuse Designer to test services in two ways: •From Designer. With this technique, Designer is the client. That is, Designer invokes the service and receives the results. •From a browser. With this technique, Designer formulates the URL necessary to invoke the service and passes that URL to your browser. Your browser actually invokes the service and receives the results. •Trace Executes flow steps one after another to the end of the service and visually marks steps as they execute. •Trace to Here Executes flow steps one after another up to a specified point and visually marks steps as they execute Step Executes the next flow step and then halts •Step Into Opens a child flow or a MAP step so that you can debug the •individual flow steps within it
- 26. 26 Messaging/Trigger In an integrationsolution that uses the publish‐and‐subscribe model, services publish instances of publishable document types, and triggers subscribe to publishable document types. When you build an integration solution that uses publication and subscription, you need to create the publishable document types before you create triggers, services that process documents, and services that publish documents What is Broker / Universal Messaging : The Broker/Universal Messaging is a high-speed message router. It enables asynchronous, message-based solutions that are built on the publish-and-subscribe model. The role of the Broker/universal messaging is to route documents between information producers (publishers) and information consumers (subscribers The Broker/Universal Messaging maintains list of subscribers that are interested in receiving certain types of documents. When the Broker/Universal messaging receives a published document, it queues the document for the subscribers of that document type. Subscribers receive the documents from their queues, which usually triggers an action on the subscriber’s system that processes the document.
- 27. 27 Specification A specification isa IS element that defines a set of service inputs and outputs. If you have multiple services with the same input and output requirements, you can point each service to a single specification rather than manually specify individual input and output fields in each service. Any change that you make to the specification is automatically propagated to all services that reference that specification.
- 28. 28 IS Schema An ISschema is a element in the Navigation panel that acts as the blueprint or model against which you validate an XML document
- 29. 29 JDBC Adapter Services Adapterservices allow you to connect to the adapter’s resource and initiate an operation on the resource from the Integration Server. You call adapter services from flow or Java services to interact with database tables. The adapter services perform database operations by calling JDBC APIs Adapter services are based on templates provided with the JDBC Adapter. Each template represents a specific technique for doing work on a resource, such as using the SelectSQL template to retrieve specified information from a database JDBC Templates: Select SQL Insert SQL Update SQL Batch Insert SQL Batch Update SQL Delete SQL Dynamic SQL
- 30. 30 JDBC Adapter Notification Anadapter notification monitors a specified database table for changes, such as an insert, update, or delete operation, so that the appropriate Java or flow services can make use of the data, such as sending an invoice or publishing it to the Integration Server.
- 31. 31 Flat file Handling Aflat file schema is the blueprint that contains the instructions for parsing or creating a flat file and is created as a namespace element in the webMethods Integration Server. This blueprint details the structure of the document, including delimiters, records, and repeated record structures. A flat file schema also acts as the model against which you can validate an inbound flat file. A flat file schema consists of hierarchical elements that represent each record, field, and subfield in a flat file. Each element is a record, composite, or field, and either a definition or reference. You then configure each element with the necessary constraints
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