tailieunhanh - Building SOA-Based Composite Applications Using NetBeans IDE 6 phần 8

Chờ một vài giây trong khi NetBeans phân tích các tập tin WSDL cho đến khi lĩnh vực dịch vụ Web Cảng là dân ảnh chụp màn hình trên cho thấy sản lượng NetBeans khi quá trình BPEL được thực hiện. Các thông báo NMR được chuyển đổi thành một JMS hợp lệ để gửi vào hàng đợi. | Handling Events The properties for the alarm handler allow the Alarm type to be configured together with the corresponding timescale as shown in the following figures With an OnMessage handler we need to specify which message the handler is going to receive and how this corresponds to the WSDL. The following properties need to be specified. Property Description Partner Link The name of the partner link that is sending the message. Port Type The port type defined within the WSDL document for the receiving message. Operation The operation or method that is being invoked. Input Variable The name of the variable within the BPEL process that will store the state of the incoming message. 194 Chapter 9 In addition to specifying these details within the properties page they can also be specified within the Property Editor as shown in the figure below. The first tab on the Property Editor dialog allows the properties described above to be specified so you can either enter them within the dialog or directly within the Properties page. As On Message handlers are used within asynchronous processes it is necessary to specify the correlations used so that the input message can be applied to the correct instance of the running BPEL process. When many instances of the same process are running within the BPEL engine the engine uses correlations to link together messages from clients to specific instances of running processes. A correlation set is basically a unique piece of information passed from the client to the BPEL engine that can be used to uniquely tie client messages to a running process. A correlation set is rather like a prime key in a relational database. It can contain one piece of data just like the prime key of a database table or it can consist of multiple pieces of data like a compound key. In this case the combination of all the data within the correlation set makes up the unique identifier for the process. Correlation sets can be created within NetBeans by .