Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
Hank, Thanks for your reply. I am not sure I am explaining this correctly but let me try adding these details and see if this helps. My backend is ColdFusion and I have created Flex remote objects to several CFCs that each correspond to a separate business object (not necessarily one table). For example, I have an employeeGateway.cfc who's methods all pertain to employees (e.g. readEmployeeById(), readEmployeeByUsername(), addEmployeePermission()). From what I understand I have to set up a remote object connection to each CFC that I want to talk to. Although I could create a single CFC to group together lookup table queries I prefer to keep them in their distinct CFCs to allow for future methods related to those objects. Does this clear things up at all or am I still way off? Thanks again for your help! Steve On 12/5/06, hank williams [EMAIL PROTECTED] wrote: Steve, You definitely shoud not have a business delegate for every lookup table. I dont really understand the detail of what you explained in your email, but communications between a client and a server should never be as granular as mapping just directly to a table. Think of communications with a server as asking high level questions like, who are my top spending customers this month. This might require access to several tables. This calculation work should be done on the server and the results should then be delivered from the server to the client. The client should generally not be taking the results of several table searches and intersecting, joining, merging or anything of the sort. That is really server side work. Regards, Hank On 12/5/06, stevehousefl [EMAIL PROTECTED] cyberdust%40gmail.com wrote: Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com flexcoders%40yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other hand, if that's not the case, what to do? The Gang Of Four chapter on the Command pattern describes a MacroCommand that executes a number of (Simple)Commands. As described it seems to simply fire them off, one after another. Wouldn't be hard to roll your own, extending ICommand, with an array property, and passing in Command objects. I could even see creating an MacroEvent class that kept track of whether its Commands had finished and that then did something when all were finished. Other Cairngorm programmers, wiser than I, will probably ask you wise questions about why you wish to pull data from six different data sources... :-) Douglas - Douglas McCarroll CairngormDocs.org Webmaster http://www.CairngormDocs.org Flex Developer http://www.brightworks.com 617.459.3840 - stevehousefl wrote: I have a command that I would like to have pull lookup data from 6 different BusinessDelegates. Should that one command call all 6 delegates or should it fire 6 new events that call 6 new commands? If the one command should call all 6 delegates in its execute function, how do you handle 6 different results
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
If I understand correctly (newbie speaking) you'd have: - A service specified on ServiceLocator for each of your CFCs - A BusinessDelegate for each method that you'll be calling Steve House wrote: Hank, Thanks for your reply. I am not sure I am explaining this correctly but let me try adding these details and see if this helps. My backend is ColdFusion and I have created Flex remote objects to several CFCs that each correspond to a separate business object (not necessarily one table). For example, I have an employeeGateway.cfc who's methods all pertain to employees (e.g. readEmployeeById(), readEmployeeByUsername(), addEmployeePermission()). From what I understand I have to set up a remote object connection to each CFC that I want to talk to. Although I could create a single CFC to group together lookup table queries I prefer to keep them in their distinct CFCs to allow for future methods related to those objects. Does this clear things up at all or am I still way off? Thanks again for your help! Steve On 12/5/06, *hank williams* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Steve, You definitely shoud not have a business delegate for every lookup table. I dont really understand the detail of what you explained in your email, but communications between a client and a server should never be as granular as mapping just directly to a table. Think of communications with a server as asking high level questions like, who are my top spending customers this month. This might require access to several tables. This calculation work should be done on the server and the results should then be delivered from the server to the client. The client should generally not be taking the results of several table searches and intersecting, joining, merging or anything of the sort. That is really server side work. Regards, Hank On 12/5/06, stevehousefl [EMAIL PROTECTED] mailto:cyberdust%40gmail.com wrote: Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us http://www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other hand, if that's not the case, what to do? The Gang Of Four chapter on the Command pattern describes a MacroCommand that executes a number of (Simple)Commands. As described it seems to simply fire them off, one after another. Wouldn't be hard to roll your own, extending ICommand, with an array property, and passing in Command objects. I could even see creating an MacroEvent class that kept track of whether its Commands had finished and that then did something when all were
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
Hank, Thanks for your reply. I am not sure I am explaining this correctly but let me try adding these details and see if this helps. My backend is ColdFusion and I have created Flex remote objects to several CFCs that each correspond to a separate business object (not necessarily one table). For example, I have an employeeGateway.cfc who's methods all pertain to employees (e.g. readEmployeeById(), readEmployeeByUsername(), addEmployeePermission()). From what I understand I have to set up a remote object connection to each CFC that I want to talk to. Although I could create a single CFC to group together lookup table queries I prefer to keep them in their distinct CFCs to allow for future methods related to those objects. Does this clear things up at all or am I still way off? Thanks again for your help! Steve On 12/5/06, hank williams [EMAIL PROTECTED] wrote: Steve, You definitely shoud not have a business delegate for every lookup table. I dont really understand the detail of what you explained in your email, but communications between a client and a server should never be as granular as mapping just directly to a table. Think of communications with a server as asking high level questions like, who are my top spending customers this month. This might require access to several tables. This calculation work should be done on the server and the results should then be delivered from the server to the client. The client should generally not be taking the results of several table searches and intersecting, joining, merging or anything of the sort. That is really server side work. Regards, Hank On 12/5/06, stevehousefl [EMAIL PROTECTED] cyberdust%40gmail.com wrote: Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com flexcoders%40yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other hand, if that's not the case, what to do? The Gang Of Four chapter on the Command pattern describes a MacroCommand that executes a number of (Simple)Commands. As described it seems to simply fire them off, one after another. Wouldn't be hard to roll your own, extending ICommand, with an array property, and passing in Command objects. I could even see creating an MacroEvent class that kept track of whether its Commands had finished and that then did something when all were finished. Other Cairngorm programmers, wiser than I, will probably ask you wise questions about why you wish to pull data from six different data sources... :-) Douglas - Douglas McCarroll CairngormDocs.org Webmaster http://www.CairngormDocs.org Flex Developer http://www.brightworks.com 617.459.3840 - stevehousefl wrote: I have a command that I would like to have pull lookup data from 6 different BusinessDelegates. Should that one command call all 6 delegates or should it fire 6 new events that call 6 new commands? If the one command should call all 6 delegates in its execute function, how do you handle 6 different results
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
Steve, I dont know much about cold fusion, but as a general architectural strategy I think you are mistaken in thinking that combining CFCs to group together lookups. Programming is all about creating simple functions, then creating more complex functions that use the simpler functions and then more complex functions that use those, etc. I dont know what the information you are trying to display is, but I would generally recommend (without knowing the actual specifics here) that you should, as I initially suggested, do this grouping on the server side. This is the kind of work that servers are suposed to do. There is no reason the simpler functions cant also be accessible to the client or to other objects on the server, but if you have a complicated function that builds on a variety of queries that is almost always done on the server side. Of course as I said, I dont know anything about cold fusion, so the mechanics of exactly how you do what I am talking about in CF is beyond me. But If you are doing a ton of massaging of data in the client, it is a sign that you server side code is not delivering high level enough information. Regards, Hank On 12/6/06, Steve House [EMAIL PROTECTED] wrote: Hank, Thanks for your reply. I am not sure I am explaining this correctly but let me try adding these details and see if this helps. My backend is ColdFusion and I have created Flex remote objects to several CFCs that each correspond to a separate business object (not necessarily one table). For example, I have an employeeGateway.cfc who's methods all pertain to employees (e.g. readEmployeeById(), readEmployeeByUsername(), addEmployeePermission()). From what I understand I have to set up a remote object connection to each CFC that I want to talk to. Although I could create a single CFC to group together lookup table queries I prefer to keep them in their distinct CFCs to allow for future methods related to those objects. Does this clear things up at all or am I still way off? Thanks again for your help! Steve On 12/5/06, hank williams [EMAIL PROTECTED] wrote: Steve, You definitely shoud not have a business delegate for every lookup table. I dont really understand the detail of what you explained in your email, but communications between a client and a server should never be as granular as mapping just directly to a table. Think of communications with a server as asking high level questions like, who are my top spending customers this month. This might require access to several tables. This calculation work should be done on the server and the results should then be delivered from the server to the client. The client should generally not be taking the results of several table searches and intersecting, joining, merging or anything of the sort. That is really server side work. Regards, Hank On 12/5/06, stevehousefl [EMAIL PROTECTED] cyberdust%40gmail.com wrote: Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com flexcoders%40yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
I do have a service for each CFC.
I have a BusinessDelegate for each as well with a method for each method on
the CFC.
Ex:
public class EmployeeDelegate
{
public function EmployeeDelegate( responder : Responder )
{
this.service = ServiceLocator.getInstance
().getRemoteObject(employeeService);
this.responder = responder;
}
public function readEmployeeByUsername(sUsername:String) : void
{
var call : Object = service.readEmployeeByUsername(sUsername);
call.resultHandler = responder.onResult;
call.faultHandler = responder.onFault;
}
private var responder : Responder;
private var service : Object;
}
On 12/6/06, Douglas McCarroll [EMAIL PROTECTED]
wrote:
If I understand correctly (newbie speaking) you'd have:
- A service specified on ServiceLocator for each of your CFCs
- A BusinessDelegate for each method that you'll be calling
Steve House wrote:
Hank,
Thanks for your reply. I am not sure I am explaining this correctly
but let me try adding these details and see if this helps. My backend
is ColdFusion and I have created Flex remote objects to several CFCs
that each correspond to a separate business object (not necessarily
one table). For example, I have an employeeGateway.cfc who's methods
all pertain to employees (e.g. readEmployeeById(),
readEmployeeByUsername(), addEmployeePermission()). From what I
understand I have to set up a remote object connection to each CFC
that I want to talk to. Although I could create a single CFC to group
together lookup table queries I prefer to keep them in their distinct
CFCs to allow for future methods related to those objects.
Does this clear things up at all or am I still way off? Thanks again
for your help!
Steve
On 12/5/06, *hank williams* [EMAIL PROTECTED] hank777%40gmail.com
mailto:[EMAIL PROTECTED] hank777%40gmail.com wrote:
Steve,
You definitely shoud not have a business delegate for every lookup
table. I dont really understand the detail of what you explained in
your email, but communications between a client and a server should
never be as granular as mapping just directly to a table. Think of
communications with a server as asking high level questions like, who
are my top spending customers this month. This might require access
to several tables. This calculation work should be done on the server
and the results should then be delivered from the server to the
client. The client should generally not be taking the results of
several table searches and intersecting, joining, merging or anything
of the sort. That is really server side work.
Regards,
Hank
On 12/5/06, stevehousefl [EMAIL PROTECTED] cyberdust%40gmail.com
mailto:cyberdust% cyberdust%2540gmail.com wrote:
Douglas (and all),
Since they are not dependent on each other, I went with just having a
single command fire 6 new events. I will look into the MacroCommand
though.
As far as the 6 different datasources, it is not. Perhaps this is
incorrect, but I have a business delegate for each lookup table and a
service (remote object) for each Coldfusion component that I am
talking to.
For example:
My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand
The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES
(and 5
other events)
The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand
The ReadAllQueuesCommand creates a QueueDelegate and executes
QueueDelegate.readAllQueues()
The QueueDelegate creates an instance of the ServiceLocator and
executes .getRemoteObject(queueService)
The queueService is configures in Services.mxml as
mx:RemoteObject
id=queueService
destination=ColdFusion
source=CF.queueHandler
showBusyCursor=true
result=event.token.resultHandler( event );
fault=event.token.faultHandler( event );/
Does this make sense
Thanks,
Steve
--- In flexcoders@yahoogroups.com flexcoders%40yahoogroups.com
mailto:flexcoders% flexcoders%2540yahoogroups.com, Douglas McCarroll
[EMAIL PROTECTED] wrote:
Hi Steve,
I'm going to take a stab at this as I've been studying the Command
pattern (as defined in GoF) and Cairngorm lately. In fact I'll be
presenting on the subject here in Boston tomorrow evening, so
this is
right up my alley. (www.bfpug.us http://www.bfpug.us) :-)
how do you handle 6 different results since there is only 1
onResult function.
I think that the answer here is you don't. :-)
Cairngorm has a SequenceCommand which has:
public var nextEvent : CairngormEvent;
You can then call its executeNextCommand() from your result()
method
which launches that event.
This will work well enough if you need results from command_1
before
you
make the service call in command_2, which you need before
command_3,
etc.
On the other hand, if that's not the case, what to do?
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
I have a BusinessDelegate for each as well with a method for each
method on the CFC.
On second thought that sounds better than what I suggested. :-)
Douglas
Steve House wrote:
I do have a service for each CFC.
I have a BusinessDelegate for each as well with a method for each
method on the CFC.
Ex:
public class EmployeeDelegate
{
public function EmployeeDelegate( responder : Responder )
{
this.service =
ServiceLocator.getInstance().getRemoteObject(employeeService);
this.responder = responder;
}
public function readEmployeeByUsername(sUsername:String) : void
{
var call : Object = service.readEmployeeByUsername(sUsername);
call.resultHandler = responder.onResult;
call.faultHandler = responder.onFault;
}
private var responder : Responder;
private var service : Object;
}
On 12/6/06, *Douglas McCarroll*
[EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
If I understand correctly (newbie speaking) you'd have:
- A service specified on ServiceLocator for each of your CFCs
- A BusinessDelegate for each method that you'll be calling
Steve House wrote:
Hank,
Thanks for your reply. I am not sure I am explaining this correctly
but let me try adding these details and see if this helps. My
backend
is ColdFusion and I have created Flex remote objects to several CFCs
that each correspond to a separate business object (not necessarily
one table). For example, I have an employeeGateway.cfc who's methods
all pertain to employees (e.g. readEmployeeById(),
readEmployeeByUsername(), addEmployeePermission()). From what I
understand I have to set up a remote object connection to each CFC
that I want to talk to. Although I could create a single CFC to
group
together lookup table queries I prefer to keep them in their
distinct
CFCs to allow for future methods related to those objects.
Does this clear things up at all or am I still way off? Thanks again
for your help!
Steve
On 12/5/06, *hank williams* [EMAIL PROTECTED]
mailto:hank777%40gmail.com
mailto:[EMAIL PROTECTED] mailto:hank777%40gmail.com wrote:
Steve,
You definitely shoud not have a business delegate for every lookup
table. I dont really understand the detail of what you explained in
your email, but communications between a client and a server should
never be as granular as mapping just directly to a table. Think of
communications with a server as asking high level questions like,
who
are my top spending customers this month. This might require access
to several tables. This calculation work should be done on the server
and the results should then be delivered from the server to the
client. The client should generally not be taking the results of
several table searches and intersecting, joining, merging or anything
of the sort. That is really server side work.
Regards,
Hank
On 12/5/06, stevehousefl [EMAIL PROTECTED]
mailto:cyberdust%40gmail.com
mailto:cyberdust% mailto:cyberdust%25 40gmail.com
http://40gmail.com wrote:
Douglas (and all),
Since they are not dependent on each other, I went with just
having a
single command fire 6 new events. I will look into the MacroCommand
though.
As far as the 6 different datasources, it is not. Perhaps this is
incorrect, but I have a business delegate for each lookup table
and a
service (remote object) for each Coldfusion component that I am
talking to.
For example:
My EVENT_LOAD_CONTROL_PANEL executes the
LoadControlPanelDataCommand
The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES
(and 5
other events)
The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand
The ReadAllQueuesCommand creates a QueueDelegate and executes
QueueDelegate.readAllQueues()
The QueueDelegate creates an instance of the ServiceLocator and
executes .getRemoteObject(queueService)
The queueService is configures in Services.mxml as
mx:RemoteObject
id=queueService
destination=ColdFusion
source=CF.queueHandler
showBusyCursor=true
result=event.token.resultHandler( event );
fault=event.token.faultHandler( event );/
Does this make sense
Thanks,
Steve
--- In flexcoders@yahoogroups.com
mailto:flexcoders%40yahoogroups.com
mailto:flexcoders% mailto:flexcoders%2540yahoogroups.com
http://40yahoogroups.com, Douglas McCarroll
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
OK Thanks for your help. Steve On 12/6/06, hank williams [EMAIL PROTECTED] wrote: Steve, I dont know much about cold fusion, but as a general architectural strategy I think you are mistaken in thinking that combining CFCs to group together lookups. Programming is all about creating simple functions, then creating more complex functions that use the simpler functions and then more complex functions that use those, etc. I dont know what the information you are trying to display is, but I would generally recommend (without knowing the actual specifics here) that you should, as I initially suggested, do this grouping on the server side. This is the kind of work that servers are suposed to do. There is no reason the simpler functions cant also be accessible to the client or to other objects on the server, but if you have a complicated function that builds on a variety of queries that is almost always done on the server side. Of course as I said, I dont know anything about cold fusion, so the mechanics of exactly how you do what I am talking about in CF is beyond me. But If you are doing a ton of massaging of data in the client, it is a sign that you server side code is not delivering high level enough information. Regards, Hank On 12/6/06, Steve House [EMAIL PROTECTED] wrote: Hank, Thanks for your reply. I am not sure I am explaining this correctly but let me try adding these details and see if this helps. My backend is ColdFusion and I have created Flex remote objects to several CFCs that each correspond to a separate business object (not necessarily one table). For example, I have an employeeGateway.cfc who's methods all pertain to employees (e.g. readEmployeeById(), readEmployeeByUsername(), addEmployeePermission()). From what I understand I have to set up a remote object connection to each CFC that I want to talk to. Although I could create a single CFC to group together lookup table queries I prefer to keep them in their distinct CFCs to allow for future methods related to those objects. Does this clear things up at all or am I still way off? Thanks again for your help! Steve On 12/5/06, hank williams [EMAIL PROTECTED] wrote: Steve, You definitely shoud not have a business delegate for every lookup table. I dont really understand the detail of what you explained in your email, but communications between a client and a server should never be as granular as mapping just directly to a table. Think of communications with a server as asking high level questions like, who are my top spending customers this month. This might require access to several tables. This calculation work should be done on the server and the results should then be delivered from the server to the client. The client should generally not be taking the results of several table searches and intersecting, joining, merging or anything of the sort. That is really server side work. Regards, Hank On 12/5/06, stevehousefl [EMAIL PROTECTED] cyberdust%40gmail.com wrote: Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com flexcoders%40yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches
[flexcoders] Re: Cairngorm Newbie Question - Please set me straight
Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other hand, if that's not the case, what to do? The Gang Of Four chapter on the Command pattern describes a MacroCommand that executes a number of (Simple)Commands. As described it seems to simply fire them off, one after another. Wouldn't be hard to roll your own, extending ICommand, with an array property, and passing in Command objects. I could even see creating an MacroEvent class that kept track of whether its Commands had finished and that then did something when all were finished. Other Cairngorm programmers, wiser than I, will probably ask you wise questions about why you wish to pull data from six different data sources... :-) Douglas - Douglas McCarroll CairngormDocs.org Webmaster http://www.CairngormDocs.org Flex Developer http://www.brightworks.com 617.459.3840 - stevehousefl wrote: I have a command that I would like to have pull lookup data from 6 different BusinessDelegates. Should that one command call all 6 delegates or should it fire 6 new events that call 6 new commands? If the one command should call all 6 delegates in its execute function, how do you handle 6 different results since there is only 1 onResult function. I am using Cairngorm 2.1. Thanks in advance, Steve
[flexcoders] Re: Cairngorm Newbie Question - Please set me straight
Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other hand, if that's not the case, what to do? The Gang Of Four chapter on the Command pattern describes a MacroCommand that executes a number of (Simple)Commands. As described it seems to simply fire them off, one after another. Wouldn't be hard to roll your own, extending ICommand, with an array property, and passing in Command objects. I could even see creating an MacroEvent class that kept track of whether its Commands had finished and that then did something when all were finished. Other Cairngorm programmers, wiser than I, will probably ask you wise questions about why you wish to pull data from six different data sources... :-) Douglas - Douglas McCarroll CairngormDocs.org Webmaster http://www.CairngormDocs.org Flex Developer http://www.brightworks.com 617.459.3840 - stevehousefl wrote: I have a command that I would like to have pull lookup data from 6 different BusinessDelegates. Should that one command call all 6 delegates or should it fire 6 new events that call 6 new commands? If the one command should call all 6 delegates in its execute function, how do you handle 6 different results since there is only 1 onResult function. I am using Cairngorm 2.1. Thanks in advance, Steve
Re: [flexcoders] Re: Cairngorm Newbie Question - Please set me straight
Steve, You definitely shoud not have a business delegate for every lookup table. I dont really understand the detail of what you explained in your email, but communications between a client and a server should never be as granular as mapping just directly to a table. Think of communications with a server as asking high level questions like, who are my top spending customers this month. This might require access to several tables. This calculation work should be done on the server and the results should then be delivered from the server to the client. The client should generally not be taking the results of several table searches and intersecting, joining, merging or anything of the sort. That is really server side work. Regards, Hank On 12/5/06, stevehousefl [EMAIL PROTECTED] wrote: Douglas (and all), Since they are not dependent on each other, I went with just having a single command fire 6 new events. I will look into the MacroCommand though. As far as the 6 different datasources, it is not. Perhaps this is incorrect, but I have a business delegate for each lookup table and a service (remote object) for each Coldfusion component that I am talking to. For example: My EVENT_LOAD_CONTROL_PANEL executes the LoadControlPanelDataCommand The LoadControlPanelDataCommand fires the EVENT_READ_ALL_QUEUES (and 5 other events) The EVENT_READ_ALL_QUEUES executes the ReadAllQueuesCommand The ReadAllQueuesCommand creates a QueueDelegate and executes QueueDelegate.readAllQueues() The QueueDelegate creates an instance of the ServiceLocator and executes .getRemoteObject(queueService) The queueService is configures in Services.mxml as mx:RemoteObject id=queueService destination=ColdFusion source=CF.queueHandler showBusyCursor=true result=event.token.resultHandler( event ); fault=event.token.faultHandler( event );/ Does this make sense Thanks, Steve --- In flexcoders@yahoogroups.com, Douglas McCarroll [EMAIL PROTECTED] wrote: Hi Steve, I'm going to take a stab at this as I've been studying the Command pattern (as defined in GoF) and Cairngorm lately. In fact I'll be presenting on the subject here in Boston tomorrow evening, so this is right up my alley. (www.bfpug.us) :-) how do you handle 6 different results since there is only 1 onResult function. I think that the answer here is you don't. :-) Cairngorm has a SequenceCommand which has: public var nextEvent : CairngormEvent; You can then call its executeNextCommand() from your result() method which launches that event. This will work well enough if you need results from command_1 before you make the service call in command_2, which you need before command_3, etc. On the other hand, if that's not the case, what to do? The Gang Of Four chapter on the Command pattern describes a MacroCommand that executes a number of (Simple)Commands. As described it seems to simply fire them off, one after another. Wouldn't be hard to roll your own, extending ICommand, with an array property, and passing in Command objects. I could even see creating an MacroEvent class that kept track of whether its Commands had finished and that then did something when all were finished. Other Cairngorm programmers, wiser than I, will probably ask you wise questions about why you wish to pull data from six different data sources... :-) Douglas - Douglas McCarroll CairngormDocs.org Webmaster http://www.CairngormDocs.org Flex Developer http://www.brightworks.com 617.459.3840 - stevehousefl wrote: I have a command that I would like to have pull lookup data from 6 different BusinessDelegates. Should that one command call all 6 delegates or should it fire 6 new events that call 6 new commands? If the one command should call all 6 delegates in its execute function, how do you handle 6 different results since there is only 1 onResult function. I am using Cairngorm 2.1. Thanks in advance, Steve -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links
