Re: [scxml] State hierarchy with scxml
Thanks Rahul. You are spot on, this was exactly what I was looking for. Many thanks. Regards -- From: "Rahul Akolkar" Sent: Monday, May 17, 2010 8:34 PM To: "Commons Users List" Subject: Re: [scxml] State hierarchy with scxml On Mon, May 17, 2010 at 12:08 PM, Charbel Abou-Khalil wrote: HI, Just wondering whether it is possible to define a state hierarchy with scxml? In short if you have a tree and the state of each tree node is based on a set of rules that will involve the states of the child nodes all the way down to the leaf nodes of the tree. From the limited information above, it seems each node has its own state machine, and changes in the node state may affect parent node's state. This could be achieved by maintaining an SCXML executor per tree node and bubbling state changes up along the parent axis using existing parent-child references available in the tree. A lighter weight structure of one executor for the entire tree can perhaps also be achieved using a state machine that is generated to match the tree structure and parent node states are managed in composite states recursively down to the simple states for the leaf nodes. -Rahul Many thanks Regards Charbel. - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: Configuration: Reading multiple files with the same name (from different jars)
Hi Ralph, Am 17.05.2010 12:34, schrieb rhwinzin: Hi, I'm currently designing an application which has to be very flexible / extendable. My idea was to provide certain "hooks" (i.e. configuration files with well defined names) that can be placed in various jar modules or in the file-system classpath. Maybe I should give an example: Say we have a configuration file "error-msg.properties". This file might be provided in various JARs (/META-INF/error-msg.properties") and all of them should be loaded. Furthermore, the application should check the file-system classpath if there's also one (or more) such property file. The whole thing should support reload strategy and the application should also check, if there was a new properties file created in the classpath. I'm not quite sure, whether Commons-Configuration supports this out of the box. If so, maybe someone could give me a hint, on how to do this. If not, hints for writing the respective extension are highly appreciated. Thanks in advance, Ralph unfortunately, there is no support for such features out of the box. But I think you could use DefaultConfigurationBuilder; it provides some functionality similar to your use case. Per default, DefaultConfigurationBuilder reads an XML definition file that defines the configuration sources to be loaded. One approach would be to generate such a file with the configuration sources you need dynamically and pass it to the builder. An alternative would be to initialize the builder manually: it is derived from XMLConfiguration, so it is possible to set properties that correspond to the definitions of configuration sources. So the basic idea is that you use DefaultConfigurationBuilder to load the configuration sources available and define reloading strategies for them. Looking up the sources would be in the responsibility of your application. Probably you will not be able to satisfy all your requirements. For instance, Commons Configuration does not provide any functionality to monitor the class path and reread configuration files if something has changed. HTH Oliver - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [scxml] State hierarchy with scxml
On Mon, May 17, 2010 at 12:08 PM, Charbel Abou-Khalil wrote: > HI, > > Just wondering whether it is possible to define a state hierarchy with scxml? > > In short if you have a tree and the state of each tree node is based on a set > of rules that will involve the states of the child nodes all the way down to > the leaf nodes of the tree. > >From the limited information above, it seems each node has its own state machine, and changes in the node state may affect parent node's state. This could be achieved by maintaining an SCXML executor per tree node and bubbling state changes up along the parent axis using existing parent-child references available in the tree. A lighter weight structure of one executor for the entire tree can perhaps also be achieved using a state machine that is generated to match the tree structure and parent node states are managed in composite states recursively down to the simple states for the leaf nodes. -Rahul > > > Many thanks > > > > Regards > > > > Charbel. > - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [scxml] State hierarchy with scxml
On May 17, 2010 11:09 AM, "Charbel Abou-Khalil" wrote: HI, Just wondering whether it is possible to define a state hierarchy with scxml? In short if you have a tree and the state of each tree node is based on a set of rules that will involve the states of the child nodes all the way down to the leaf nodes of the tree. Many thanks Regards Charbel.
[scxml] State hierarchy with scxml
HI, Just wondering whether it is possible to define a state hierarchy with scxml? In short if you have a tree and the state of each tree node is based on a set of rules that will involve the states of the child nodes all the way down to the leaf nodes of the tree. Many thanks Regards Charbel.
[Travel Assistance] - applications Open for ApacheCon NA 2010
The Travel Assistance Committee is now taking in applications for those wanting to attend ApacheCon North America (NA) 2010, which is taking place between the 1st and 5th November in Atlanta. The Travel Assistance Committee is looking for people who would like to be able to attend ApacheCon, but who need some financial support in order to be able to get there. There are limited places available, and all applications will be scored on their individual merit. Financial assistance is available to cover travel to the event, either in part or in full, depending on circumstances. However, the support available for those attending only the barcamp is smaller than that for people attending the whole event. The Travel Assistance Committee aims to support all ApacheCons, and cross-project events, and so it may be prudent for those in Asia and the EU to wait for an event closer to them. More information can be found on the main Apache website at http://www.apache.org/travel/index.html - where you will also find a link to the online application and details for submitting. Applications for applying for travel assistance are now being accepted, and will close on the 7th July 2010. Good luck to all those that will apply. You are welcome to tweet, blog as appropriate. Regards, The Travel Assistance Committee. - To unsubscribe, e-mail: general-unsubscr...@incubator.apache.org For additional commands, e-mail: general-h...@incubator.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Configuration: Reading multiple files with the same name (from different jars)
Hi, I'm currently designing an application which has to be very flexible / extendable. My idea was to provide certain "hooks" (i.e. configuration files with well defined names) that can be placed in various jar modules or in the file-system classpath. Maybe I should give an example: Say we have a configuration file "error-msg.properties". This file might be provided in various JARs (/META-INF/error-msg.properties") and all of them should be loaded. Furthermore, the application should check the file-system classpath if there's also one (or more) such property file. The whole thing should support reload strategy and the application should also check, if there was a new properties file created in the classpath. I'm not quite sure, whether Commons-Configuration supports this out of the box. If so, maybe someone could give me a hint, on how to do this. If not, hints for writing the respective extension are highly appreciated. Thanks in advance, Ralph -- View this message in context: http://apache-commons.680414.n4.nabble.com/Configuration-Reading-multiple-files-with-the-same-name-from-different-jars-tp2219402p2219402.html Sent from the Commons - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
