All WebLogic Workshop controls follow a consistent model. Many aspects of using ebXML controls are identical or similar to using other WebLogic Workshop controls. To learn about WebLogic Workshop controls, see Using Built-In Java Controls.
After you have added an ebXML control to an initiator business process, you can use methods on the control to exchange ebXML messages with participant trading partners. In the Design View, you expand the node for the ebXML control in the Data Palette to expose its methods, and then drag and drop the methods you want onto the business process. Common tasks include:
To learn more about these methods, see ebXML Control Interface.
The ebXML control is a JCX file. To learn about using JCX files, see JCX Files: Extending Controls.
To send an ebXML message to a participant, you use a send message method in a Control Send node. By default, the JCX instance includes a generated send method named request. To add the Control Send node to a business process, you drag this method from the Data Palette onto the business process. For business processes that involve multiple round-trips, you need to create a separate Control Send node for each operation that involves sending an ebXML message to the participant.
Note: The default return type for the request method is void. However, you can also specify the return type to be XmlObject. If you use XmlObject as the return type, the content the XmlObject is the ebXML envelope data.
After creating the Control Send node, you need to specify the payload parts and their Java data types. Valid data types include:
Any non-XML structured or unstructured data for which no MFL file (and therefore no known schema) exists. |
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Array containing one or more parts of an ebXML business message. Message parts can be untyped XML data (XmlObject data type) or non-XML data (RawData data type). Used when sending different kinds of payloads (XML and non-XML) in the same message. The actual number of message parts might not be known until processed. To learn about working with MessageAttachment[] objects, see Using Message Attachments. |
Attachments can also be typed XML or typed MFL data as long as you specify the corresponding XML Bean or MFL class name in the parameter.
If you use arrays as attachment type, certain restrictions apply to the order of your arguments. For more informations, see Specifying XmlObject and RawData Array Payloads.
You can specify business IDs statically (using the @jc:ebxml Annotation) or dynamically. To learn about specifying business IDs dynamically, see Dynamically Specifying Business IDs.
Participants can respond to initiator requests in the following ways:
To handle responses from participants, initiator business processes use the following callback methods:
Handles the acknowledgement of the message receipt from the participant. |
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To receive an ebXML message from a participant, you use the appropriate method. To add the method to a business process, you drag it from the Data Palette onto the business process, which creates a Control Receive node. For business processes that involve multiple round-trips, you need to create a separate Control Receive node for each operation that involves receiving an ebXML message from the participant.
For the response method, if you specify non-default in the ebxml-action-node, you can rename the Control Receive node to make it more descriptive, such as getInvoice. However, if you specify default in the ebxml-action-node, you must use the default name (onMessage) and the business process can have only one onMessage Control Receive node.
For the response method, after creating the Control Receive node, you need to specify the payload parts and their Java data type for the incoming message. To learn about valid data types, see Sending Messages to Participants.
The onError and onAck methods are system-level methods. Both use the EnvelopeDocument argument, which will contain an ebXML envelope when the message is received. As they are system-level methods, these arguments are not seen in the default control but you can drag them onto the business process from the Data Palette. If your application contains a schema project that includes the envelope.xsd file, and if the schema is already built, you can extract the values you want by creating a query (in the XQuery language) using the mapper functionality of WebLogic Workshop. To learn about creating queries with the mapper functionality, see Transforming Data Using XQuery.
You can retrieve the message envelope of an incoming ebXML message by using the envelope annotation in the @jc:ebxml-method tag. To learn more about the envelope annotation, see @jc:ebxml-method Annotation.
The ebXML control adds the capability of dynamically binding business IDs for the initiator (from property) and the participant (to property) of the control. Dynamic binding of properties can be achieved the following ways:
The hierarchy of property settings is as follows, starting with the approach having the highest precedence:
Dynamic selectors have a higher precedence than static selectors.
Using a dynamic selector, ebXML controls allow you to decide at run time which one of multiple trading partners to send a business message to. When you specify a dynamic selector, you build and test an XQuery that retrieves the business ID you need.
The setProperties method accepts an ebXMLPropertiesDocument parameter. The ebXMLPropertiesDocument type is an XML Beans class that is generated out of the corresponding schema element defined in DynamicProperties.xsd. The DynamicProperties.xsd file is located in the system folder of New Process Applications or in the system folder of the Schemas project.
If your application contains a schema project that includes the DynamicProperties.xsd file, and if the schema is already built, you can extract the values you want by creating a query (in the XQuery language) using the mapper functionality of WebLogic Workshop. To learn about creating queries with the mapper functionality, see Transforming Data Using XQuery.
To set business IDs dynamically using the setProperties method
To display the current property settings, use the getProperties() method.
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