PowerBuilder advanced debugging technology and skills - Computer Application papers - Computer papers - Research Papers Center Language: Simplified Chinese English German Traditional Chinese Home Management Education Economics Engineering Marketing Medicine Computer Culture Science Literature Political Business Legal English Work Summary Work Plan Fiscal Levy Financial Management Accounting Practical Philosophy Securities Finance Public Management Location:Research Papers Center > Computer papers > Computer Application papers > papers PowerBuilder advanced debugging technology and skills Papers Category:Computer Papers - Computer Application Papers Post Time:2005-12-23 10:49:00 Abstract PowerBuilder programming tools for advanced debugging techniques, including temporary breakpoints and conditions set breakpoints, variable value to change the breakpoint is set, Just-in-time debugging, the middle layer of Jaguar CTS components, key technologies such as remote debugging Keywords: breakpoint; local debugging; remote debugging; Jaguar Components 1 Introduction PowerBuilder is a database front-end application development mainstream programming tools, as from the Client / Server in a two-tier development model to the three-tier or even multi-storey development model of the transition, PowerBuilder constantly adding new features to accommodate and promote this change. PowerBuilder 7 version of the already Jaguar through the development of a typical middle-tier components to create distributed applications. This PowerBuilder debugging techniques to make new demands. Debug technology in any software development in both stations are there and its important position. The use of PowerBuilder development is no exception. PowerBuilder powerful debugging tool integration drawing board, making debugging easier, but some of the advanced debugging techniques and technology is not very easy to master, but to master and use these advanced debugging techniques and technology is important to develop high-quality software products guarantee for excellent PowerBuilder developer must have the ability. PowerBuilder provides advanced debugging techniques include: the provision of temporary and conditional breakpoints, set the variable value change breakpoint, Just-in-time debugging, Jaguar component remote debugging technique (Remote Debug). The first three debugging techniques suitable for local debugging; the last one is a distributed application debugging techniques can be deployed in the client-side application services Jaguar CTS (Component Transaction Server Component Transaction Server for short) and debugging components, including to the event or method to debug into the script, to observe and change the component variables and so on. Local debugging Remote debugging technology as the foundation of PowerBuilder to do distributed development of key technologies, although the local commissioning similar, but it has its unique and complex aspect is to make good middle-tier component development PowerBuilder important technical . Of course, familiar with the local commissioning of various technical details, in order to better to engage in remote debugging. For the basic debugging techniques (such as setting breakpoints, single stepping, shielding and clear breakpoints, watch variables, etc.) are no longer tired out. About 2 PowerBuilder7 debug Sketchpad Debug drawing board integrates a powerful debugging PowerBuilder features, including the following major sections: 1) Breakpoints View: Show all want to debug an object, event, code-line information, it is very easy to locate by the need to debug the code, or to enable a breakpoint and shielding such an operation. 2) Callstacks View: show debug breakpoint in the program is called the level of return will be in accordance with this onto the stack in order to return. Provides a program execution of the macro clues. 3) Instances: show examples of the state of remote components and other information. Only applies to remote debugging. 4) Objects In Memory: display the list of objects loaded into memory. Through which objects can be observed in memory of the occupation of (not for remote debugging purposes). 5) Source View: display the code. 6) Source Browser: display applications, a list of all the objects. 7) Source History: displayed in Source View in the list have appeared in the code. 8) Variables View:: show all types of variables. Debug drawing board in the man-made changes in variable values, or set the variable's value in a change in procedure is triggered when the interrupt debug. 9) Watch View: display selected from a variable value to carry out such an expression of the operation. 3 Local Debugging 3.1 Temporary and Conditional Breakpoint For the average breakpoint, in the Source View can be a very easy to get set up. If the breakpoint at the loop, you may not expect all of each loop jump debug drawing board at this time and conditions need to set the temporary breakpoint. A breakpoint in the number of cycles after the trigger of an interim nature trigger; breakpoint conditions are met after a certain expression trigger conditions are triggered; the breakpoint in the same location can exist two kinds of temporary and conditions of the trigger mechanism. Open the corresponding breakpoint editor pop-up window (in the Breakpoint View, and be able to open the Source View), in the Occurrence column fill an integer representing the number of times per cycle was triggered by the breakpoint; in Condition part fill an expression, For example ll_i = 10, so that in this loop, each time in the variable ll_i = 10 this condition is met when the breakpoint is triggered. Temporary and conditions can be triggered at the same time, in which case both must be met before a breakpoint is triggered. Of course, trigger conditions can also be used do not belong inside the revolving nature of the code segment. 3.2 set the variable value change breakpoint If the debugging of particular interest to a variable interest in the value of a variable where the change (for example, by the false becomes true, from 0 to become non-0, etc.), then you can set the variable value change breakpoint is triggered. Variables selected method is the variable you want to debug, right pop-up menu, choose Break on Change, so each time the value of this variable is changed, it will trigger the breakpoint, the code can easily see which ones were assigned to this variable is the value of operation is conducive to change in this variable trajectory tracking. 3.3Just-in-time debugging When the normal mode instead of debug mode when running the application, if the program does not operate normally, or even Baocuo may need to exit and re-open the drawing board debugging, debugging this exception or error, more trouble; choose just-in-time mode, will be able to debug in case of need, when real-time switch to debug mode. Select the menu Windows Struggling with your Computer Application Papers? Did you know that we can help you create the perfect Computer Application Papers? Our essay writing service is the best soultion for acheiving the grades you need. 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