Re: Passing data between a dialog and a subdialog
On 7/23/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: Hi Rahul, thanks for your answer. > Subdialogs receive the same dialog data (same instance of data > class) so there is no need for any such elaborate mechanism. I find it a bit dangerous to let two independent "components" work on the same set of data especially if the components are being developed by different people (potentially in different places). Shouldn't we treat a client component the same way we would treat a server component? If we do so, the client components should also have well defined interfaces through which they talk with each other (the interfaces don't have to be Java interfaces). The SCXML implementation has its own view about the "independence" of parent-child dialogs. Subdialogs are white boxes, you can look in, you can navigate directly to a state therein, you can access the data(model), you can attach listeners to the parent that watch changes in a subdialog for behavioral niceties etc. i.e. most things are transparent. For some set of applications, this works well (without manufactured interfaces and stunning XML vocabularies). Just think of a large distributed development team in which every developer is assigned to work on a different (complex) dialog and the dialogs interact with each other. Then throw farshoring and dialog reuse across different IT companies for the same customer into the mix :-) As you have articulated above, for another set of applications, there are additional considerations at play. I would like to believe that the architects who choose the SCXML implementation, choose it for its extensibility, overall positive impact across the development cycle, and additional potential exposed by virtue of some of the transparencies -- and are also aware of what this means it terms of putting pen to paper (and fingertips to keyboard). -Rahul Gruß Marc
AW: Passing data between a dialog and a subdialog
Hi Rahul, thanks for your answer. > Subdialogs receive the same dialog data (same instance of data > class) so there is no need for any such elaborate mechanism. I find it a bit dangerous to let two independent "components" work on the same set of data especially if the components are being developed by different people (potentially in different places). Shouldn't we treat a client component the same way we would treat a server component? If we do so, the client components should also have well defined interfaces through which they talk with each other (the interfaces don't have to be Java interfaces). Just think of a large distributed development team in which every developer is assigned to work on a different (complex) dialog and the dialogs interact with each other. Then throw farshoring and dialog reuse across different IT companies for the same customer into the mix :-) Gruß Marc Von: Rahul Akolkar [mailto:[EMAIL PROTECTED] Gesendet: Mo 23.07.2007 21:23 An: user@shale.apache.org Betreff: Re: Passing data between a dialog and a subdialog On 7/23/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > But is there also a way to do that in the xml dialog definition. Something > like > > > > > >... > > (Web Flow example) > * Basic implementation: No, there isn't a declarative way to do that via the dialog-config.xml. However, feel free to open an enhancement request via JIRA [1] about making data flow easier / more elegant across parent-child dialogs (if there isn't one already, please check existing tickets). * SCXML implementation: Subdialogs receive the same dialog data (same instance of data class) so there is no need for any such elaborate mechanism. -Rahul [1] http://shale.apache.org/issue-tracking.html > Gruß > Marc > > > -Ursprüngliche Nachricht- > Von: samju [mailto:[EMAIL PROTECTED] > Gesendet: Mo 23.07.2007 12:07 > An: user@shale.apache.org > Betreff: Re: Passing data between a dialog and a subdialog > > > your Question is illustrated under the following > Thread:http://www.nabble.com/transition-between-2-Dialog-tf3885103.html#a11029950 > and here is the Solution: Graig wrote: > "Two ideas for how to do this: > > * (As I mentioned in the previous response), store a > reference to your parent dialog's data object *separately* > in session scope so that it can be accessed directly. > > * Ensure that the subdialog receives the same data object > as the parent dialog does. Note that it is not good enough > to have the same data *class*, you really need the same > *instance* of that class in order to share data. > > Craig > " > Sam > > marc.jaeckle wrote: > > > > Hi everybody, > > > > is there a way to pass data between a dialog and a subdialog in the basic > > implementation or between a "dialog state" and a "subdialog state" of the > > scxml implementation? I'm looking for something similar to the attribute > > mappers that Spring Web Flow features. The idea is to treat the dialogs as > > black boxes that have defined input and output values (I'm not talking > > about string outcomes but actual business data here) so they can be reused > > easily in different contexts. > > > > Example to illustrate the problem: > > There is a partsDialog that displays information on car parts. The > > partsDialog allows the user to open a subdialog to search for a specific > > part of a car to display information on that part. The partsDialog > > initializes the searchPart subdialog with the type of the car and the > > searchPart subdialog returns a part number to the partsDialog when it is > > done. The searchPart subdialog is also to be used as a subdialog in other > > contexts. > > > > Gruß > > Marc > > > >
Re: Passing data between a dialog and a subdialog
On 7/23/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: But is there also a way to do that in the xml dialog definition. Something like ... (Web Flow example) * Basic implementation: No, there isn't a declarative way to do that via the dialog-config.xml. However, feel free to open an enhancement request via JIRA [1] about making data flow easier / more elegant across parent-child dialogs (if there isn't one already, please check existing tickets). * SCXML implementation: Subdialogs receive the same dialog data (same instance of data class) so there is no need for any such elaborate mechanism. -Rahul [1] http://shale.apache.org/issue-tracking.html Gruß Marc -Ursprüngliche Nachricht- Von: samju [mailto:[EMAIL PROTECTED] Gesendet: Mo 23.07.2007 12:07 An: user@shale.apache.org Betreff: Re: Passing data between a dialog and a subdialog your Question is illustrated under the following Thread:http://www.nabble.com/transition-between-2-Dialog-tf3885103.html#a11029950 and here is the Solution: Graig wrote: "Two ideas for how to do this: * (As I mentioned in the previous response), store a reference to your parent dialog's data object *separately* in session scope so that it can be accessed directly. * Ensure that the subdialog receives the same data object as the parent dialog does. Note that it is not good enough to have the same data *class*, you really need the same *instance* of that class in order to share data. Craig " Sam marc.jaeckle wrote: > > Hi everybody, > > is there a way to pass data between a dialog and a subdialog in the basic > implementation or between a "dialog state" and a "subdialog state" of the > scxml implementation? I'm looking for something similar to the attribute > mappers that Spring Web Flow features. The idea is to treat the dialogs as > black boxes that have defined input and output values (I'm not talking > about string outcomes but actual business data here) so they can be reused > easily in different contexts. > > Example to illustrate the problem: > There is a partsDialog that displays information on car parts. The > partsDialog allows the user to open a subdialog to search for a specific > part of a car to display information on that part. The partsDialog > initializes the searchPart subdialog with the type of the car and the > searchPart subdialog returns a part number to the partsDialog when it is > done. The searchPart subdialog is also to be used as a subdialog in other > contexts. > > Gruß > Marc > >
AW: Passing data between a dialog and a subdialog
But is there also a way to do that in the xml dialog definition. Something like ... (Web Flow example) Gruß Marc -Ursprüngliche Nachricht- Von: samju [mailto:[EMAIL PROTECTED] Gesendet: Mo 23.07.2007 12:07 An: user@shale.apache.org Betreff: Re: Passing data between a dialog and a subdialog your Question is illustrated under the following Thread:http://www.nabble.com/transition-between-2-Dialog-tf3885103.html#a11029950 and here is the Solution: Graig wrote: "Two ideas for how to do this: * (As I mentioned in the previous response), store a reference to your parent dialog's data object *separately* in session scope so that it can be accessed directly. * Ensure that the subdialog receives the same data object as the parent dialog does. Note that it is not good enough to have the same data *class*, you really need the same *instance* of that class in order to share data. Craig " Sam marc.jaeckle wrote: > > Hi everybody, > > is there a way to pass data between a dialog and a subdialog in the basic > implementation or between a "dialog state" and a "subdialog state" of the > scxml implementation? I'm looking for something similar to the attribute > mappers that Spring Web Flow features. The idea is to treat the dialogs as > black boxes that have defined input and output values (I'm not talking > about string outcomes but actual business data here) so they can be reused > easily in different contexts. > > Example to illustrate the problem: > There is a partsDialog that displays information on car parts. The > partsDialog allows the user to open a subdialog to search for a specific > part of a car to display information on that part. The partsDialog > initializes the searchPart subdialog with the type of the car and the > searchPart subdialog returns a part number to the partsDialog when it is > done. The searchPart subdialog is also to be used as a subdialog in other > contexts. > > Gruß > Marc > > -- View this message in context: http://www.nabble.com/Passing-data-between-a-dialog-and-a-subdialog-tf4128322.html#a11741044 Sent from the Shale - User mailing list archive at Nabble.com.
Re: Passing data between a dialog and a subdialog
your Question is illustrated under the following Thread:http://www.nabble.com/transition-between-2-Dialog-tf3885103.html#a11029950 and here is the Solution: Graig wrote: "Two ideas for how to do this: * (As I mentioned in the previous response), store a reference to your parent dialog's data object *separately* in session scope so that it can be accessed directly. * Ensure that the subdialog receives the same data object as the parent dialog does. Note that it is not good enough to have the same data *class*, you really need the same *instance* of that class in order to share data. Craig " Sam marc.jaeckle wrote: > > Hi everybody, > > is there a way to pass data between a dialog and a subdialog in the basic > implementation or between a "dialog state" and a "subdialog state" of the > scxml implementation? I'm looking for something similar to the attribute > mappers that Spring Web Flow features. The idea is to treat the dialogs as > black boxes that have defined input and output values (I'm not talking > about string outcomes but actual business data here) so they can be reused > easily in different contexts. > > Example to illustrate the problem: > There is a partsDialog that displays information on car parts. The > partsDialog allows the user to open a subdialog to search for a specific > part of a car to display information on that part. The partsDialog > initializes the searchPart subdialog with the type of the car and the > searchPart subdialog returns a part number to the partsDialog when it is > done. The searchPart subdialog is also to be used as a subdialog in other > contexts. > > Gruß > Marc > > -- View this message in context: http://www.nabble.com/Passing-data-between-a-dialog-and-a-subdialog-tf4128322.html#a11741044 Sent from the Shale - User mailing list archive at Nabble.com.
Passing data between a dialog and a subdialog
Hi everybody, is there a way to pass data between a dialog and a subdialog in the basic implementation or between a "dialog state" and a "subdialog state" of the scxml implementation? I'm looking for something similar to the attribute mappers that Spring Web Flow features. The idea is to treat the dialogs as black boxes that have defined input and output values (I'm not talking about string outcomes but actual business data here) so they can be reused easily in different contexts. Example to illustrate the problem: There is a partsDialog that displays information on car parts. The partsDialog allows the user to open a subdialog to search for a specific part of a car to display information on that part. The partsDialog initializes the searchPart subdialog with the type of the car and the searchPart subdialog returns a part number to the partsDialog when it is done. The searchPart subdialog is also to be used as a subdialog in other contexts. Gruß Marc
