Java Client Security
I've been researching this topic for a few days, since I realized that the scheme outlined in Chapter 25 of WO JCDA on building a login window was dependent on the fact that your client application used a login window before you could access the server. But what if some hacker built a client application that was not so nice and that started accessing the server side with no checking. Depending on a client app for security is definitely not a good idea. It seemed this question was asked in: http://lists.apple.com/archives/webobjects-dev/2005/Mar/msg00177.html but there seemed to be no satisfactory answer apart from stability of WO was very good, and maybe he should use AJAX, but the answers did not address security. Specifically, I wanted to do a check in the server-side EOEnterpriseObjects whether a logged in user was allowed to do the CRED (create, read, edit, delete aka CRUD but I think CRED sounds more credible) operations on the current object, but there seemed to be no way to get from an object to the current session (unlike WOComponents) and the stored user record for the current user. Anyway, I think I have found the answer in Chapter 6, p 140 on delegates, that the session object is a delegate of EODistributionContext and these delegate methods are called to check security before operations are allowed on the server side. These return false if the user is not logged in, which can be in a parent class of session and then in a subclass provide more fine-grained access control for checking CRED operations. Has anyone else implemented such a JC security scheme? Does this sound like the right way to go? Thanks Ian Joyner Sportstec ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Content Management
Please check out the podcast, WebObjects Worx, in the iTunes Podcast Directory. Take a look here: http://autreyrealestate.com, that is a site with a complete CMS system that I built with WebObjects. I can tell you how to view the administrative features off-list if you're interested. But yes, WebObjects is perfect for building a CMS system. Joshua Markers Visual Quick-Pro Guide is a great start as well as the tutorials offered in the Apple Documentation. The podcast and offered video training is great as well. Best Regards, --- Nathan Walker Vision Worx Productions 229-253-8552 Skype Name: nrwalker [EMAIL PROTECTED] http://visionworxpro.com On Oct 27, 2005, at 12:11 AM, Simon Whitty wrote: Hi, I'm new to web objects - haven't really used it at all. I'm just wondering where I can find out about it and it is good for? Is it useful for building a CMS system? Are there many open source web objects apps / cms systems out there? cheers Simon ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/wodev% 40visionworxpro.com This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Short URL Generation
Lachlan, Methinks you have read it backwards. :-) I think Greg is asking how to get the short URLs into the HTML his app generates. Overriding WOContext is one way of doing it. I've pondered this a few times but never did so. Another alternative is to use regex to replace them in Application.dispatchRequest(). So far, my solution has been to make a URL factory class and bind that to the href etc attribute instead of binding to action. Chuck On Oct 26, 2005, at 10:16 PM, Lachlan Deck wrote: Hi there, On 27/10/2005, at 2:01 PM, Greg Hulands wrote: I am looking to generate short URL's that I have created for mod_rewrite I thought that was the idea of mod-rewrite. i.e., it translates urls for you e.g., from external short urls to internal long ones. So if you've set up your rewrite rules correctly, you shouldn't need to do much else. for direct actions. After reading the docs, it looks like I have to create a subclass of WOContext and over ride the directActionURLForActionNamed method and have a map from a direct action class / method to a shortened url. I just wanted to ask to see if this is the best way to achieve this. If you want to customise the way that incoming requests are handled, then you'd be looking at overriding WORequestHandler so that they are directed correctly. I've, for example, extended com.webobjects.appserver._private.WODirectActionRequestHandler so that I can call: http://.../wa/SomeClass/action where my direct action classes are named, for easy reference in the project, like SomeClassDirectAction.java with regards, -- Lachlan Deck ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/chill% 40global-village.net This email sent to [EMAIL PROTECTED] -- Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Short URL Generation
Hi there, On 27/10/2005, at 2:01 PM, Greg Hulands wrote: I am looking to generate short URL's that I have created for mod_rewrite I thought that was the idea of mod-rewrite. i.e., it translates urls for you e.g., from external short urls to internal long ones. So if you've set up your rewrite rules correctly, you shouldn't need to do much else. for direct actions. After reading the docs, it looks like I have to create a subclass of WOContext and over ride the directActionURLForActionNamed method and have a map from a direct action class / method to a shortened url. I just wanted to ask to see if this is the best way to achieve this. If you want to customise the way that incoming requests are handled, then you'd be looking at overriding WORequestHandler so that they are directed correctly. I've, for example, extended com.webobjects.appserver._private.WODirectActionRequestHandler so that I can call: http://.../wa/SomeClass/action where my direct action classes are named, for easy reference in the project, like SomeClassDirectAction.java with regards, -- Lachlan Deck ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Content Management
Hi, I'm new to web objects - haven't really used it at all. I'm just wondering where I can find out about it and it is good for? Is it useful for building a CMS system? Are there many open source web objects apps / cms systems out there? cheers Simon ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Short URL Generation
Hi, I am looking to generate short URL's that I have created for mod_rewrite for direct actions. After reading the docs, it looks like I have to create a subclass of WOContext and over ride the directActionURLForActionNamed method and have a map from a direct action class / method to a shortened url. I just wanted to ask to see if this is the best way to achieve this. Does anyone have any opinions on this? Regards, Greg ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Web Based EOModeler?
On Oct 26, 2005, at 7:21 PM, King Chung Huang wrote: Hi Chuck, Can you describe this problem in more detail? EOModeler is buggy. It simply does not provide a GUI way to create a subclass from an entity in another model. You can to create a sub- class of the entity in the original model, and then cut and paste it where you want it. In the process, some bits are lost and you end up cutting and pasting the relationships bit by bit. That is when it works. When the model you want to sub-class from is in an installed framework and uses prototypes, EOModeler will not load the prototypes and so those don't get into the subclass and can't be cut and pasted. So subclassing quickly becomes retyping. The work around (such as it is) is to open the EOModel in its original source project (if you have it), create the subclass, then open the other project and paste in the entity. Then fix it up. What do you do now in emacs? Copy the entity from one model to the other, edit it, change the name, table, class etc, set the parent. It is not too bad if you plan ahead a bit. And, what do you like to have in EOModeler to achieve the same functionality? The same functionality as it has now for inheritance within a single model, but working for inheritance across models. This is quite easy to do in code, it is just buggy in EOModeler (what a shock!). :-P Chuck On Oct 26, 2005, at 10:30 AM, Chuck Hill wrote: Given a choice between a mythical, fully functional desktop app and something else that works _now_, which would you prefer? :-) Right now, I'd be pleased with even a command line tool that made cross model inheritance easier than in emacs. And that is probably what I will end up with. EOModeler does not seem too pleased with cross model inheritance from an installed framework when Xcode is not being used (even worse than before!). -- Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Web Based EOModeler?
I believe it was Andreas Wendker who demoed a "new" EOModeler at a WO feedback session at WWDC 2003. Andreas was the manager of WebObjects engineering at the time. On Oct 23, 2005, at 2:55 AM, Helge Staedtler wrote: Sorry for stepping in that late in this discussion, but I think I have already once seen what you are describing. I have seen it visiting one of the WWDC's (2000,2001 or 2002) from an Apple Engineer. He demoed a webbased EOModeler to the audience and it worked very well. I think he also added proudly that this app took him only couple of hours to put it together. ;-) ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Web Based EOModeler?
Hi Chuck, Can you describe this problem in more detail? What do you do now in emacs? And, what do you like to have in EOModeler to achieve the same functionality? King Chung Huang Learning Commons University of Calgary On Oct 26, 2005, at 10:30 AM, Chuck Hill wrote: Given a choice between a mythical, fully functional desktop app and something else that works _now_, which would you prefer? :-) Right now, I'd be pleased with even a command line tool that made cross model inheritance easier than in emacs. And that is probably what I will end up with. EOModeler does not seem too pleased with cross model inheritance from an installed framework when Xcode is not being used (even worse than before!). ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: PowerSchool and WebObjects
You can find on the web some PowerSchool/WebObjects post-mortems. Apparently it turned into a Deathmarch. David K. Every had some involvement with that. -arturo On Oct 26, 2005, at 6:45 PM, L. Caballero wrote: Ok, thanks. L. Caballero El 26/10/2005, a las 23:19, Karl escribió: I believe that PowerSchool is written in 4D, not WO. There was a project in Apple to rewrite PowerSchool in WO to enable it to scale better but this project appeared to die a couple of years ago. Karl On 26-Oct-05, at 5:13 PM, L. Caballero wrote: Hi all, Is Powerschool, an application developed in WebObjects? If the answer is positive: In what version? Thanks. L. Caballero ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/ kgretton%40mac.com This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/ arturo%40ethicist.net This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: PowerSchool and WebObjects
Ok, thanks. L. Caballero El 26/10/2005, a las 23:19, Karl escribió: I believe that PowerSchool is written in 4D, not WO. There was a project in Apple to rewrite PowerSchool in WO to enable it to scale better but this project appeared to die a couple of years ago. Karl On 26-Oct-05, at 5:13 PM, L. Caballero wrote: Hi all, Is Powerschool, an application developed in WebObjects? If the answer is positive: In what version? Thanks. L. Caballero ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/kgretton% 40mac.com This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: PowerSchool and WebObjects
I believe that PowerSchool is written in 4D, not WO. There was a project in Apple to rewrite PowerSchool in WO to enable it to scale better but this project appeared to die a couple of years ago. Karl On 26-Oct-05, at 5:13 PM, L. Caballero wrote: Hi all, Is Powerschool, an application developed in WebObjects? If the answer is positive: In what version? Thanks. L. Caballero ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/kgretton% 40mac.com This email sent to [EMAIL PROTECTED] smime.p7s Description: S/MIME cryptographic signature ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
PowerSchool and WebObjects
Hi all, Is Powerschool, an application developed in WebObjects? If the answer is positive: In what version? Thanks. L. Caballero ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Obtaining the elementID
Some more thoughts on why this is the way it is and why there is no
componentForElementID(String id) method on WOComponent:
You could hack something out by doing this:
public WOActionResults invokeAction( WOContext aContext,
WORequest aRequest ) {
if ( aContext.senderID().equals( aContext.elementID() ) ) {
aContext().page().registerComponentForElementID(this,
aContext.elementID());
}
return super.invokeAction(aContext, aRequest);
}
But you would run into problems with stateless components and
dynamic elements as their state depends on the exact state of the
tree traversal when they are accessed. And the element you are
trying to access may have been hidden during another phase leading to
inconsistencies down the line and the introduction of security breaches.
Chuck
On Oct 26, 2005, at 11:49 AM, Stephane Guyot wrote:
Miguel,
Have a look on the examples : /Developer/Examples/JavaWebObjects/
Frameworks/WOComponentElements
In WXActionURL.java you have exactly what you a looking for :
/**
* Override of invokeAction method - this method is used to
perform the action
* from the bindings. This method matches the sender ID with
the element ID
* (to ensure this is the instance we want) and then returns
the action from
* the bindings.
*/
public WOActionResults invokeAction( WOContext aContext,
WORequest aRequest ) {
if ( aContext.senderID().equals( aContext.elementID() ) ) {
return (WOActionResults)valueForBinding( "action" );
}
return null;
}
}
HTH,
Stephane
Le 25 oct. 05, à 00:33, Miguel Arroz a écrit :
Hi!
I'm trying some AJAX stuff, and I need to work with the element
IDs of the objects. While building the page, i just ask the
context what is the current elementID(). But how do I do the
reverse operation? How can I ask the context what is the object
associated with some ID?
Yours
Miguel Arroz
"The world lies in the hands of evil
And we pray it would last" -- Apocalyptica, Life Burns!
Miguel Arroz
http://www.ipragma.com
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Re: Obtaining the elementID
Miguel,
Have a look on the examples : /Developer/Examples/JavaWebObjects/Frameworks/WOComponentElements
In WXActionURL.java you have exactly what you a looking for :
/**
* Override of invokeAction method - this method is used to perform the action
* from the bindings. This method matches the sender ID with the element ID
* (to ensure this is the instance we want) and then returns the action from
* the bindings.
*/
public WOActionResults invokeAction( WOContext aContext, WORequest aRequest ) {
if ( aContext.senderID().equals( aContext.elementID() ) ) {
return (WOActionResults)valueForBinding( "action" );
}
return null;
}
}
HTH,
Stephane
Le 25 oct. 05, à 00:33, Miguel Arroz a écrit :
Hi!
I'm trying some AJAX stuff, and I need to work with the element IDs of the objects. While building the page, i just ask the context what is the current elementID(). But how do I do the reverse operation? How can I ask the context what is the object associated with some ID?
Yours
Miguel Arroz
"The world lies in the hands of evil
And we pray it would last" -- Apocalyptica, Life Burns!
Miguel Arroz
http://www.ipragma.com
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Re: connection dictionary error?
...and 43.2% of all statistics are made-up on the fly! :) I think Hugi is absolutely correct. -Bill on 10/26/05 10:18, Hugi Thordarson at [EMAIL PROTECTED] wrote: > If you're using FrontBase; I've found that 99,65% of the time > I get this error, it's because I forgot to include the > FrontBasePlugin framework in my project. > > Cheers, > - Hugi > > On 26.10.2005, at 13:29, Jeremy Matthews wrote: > >> When attempting to insert values into the database, I receive this >> WO error: >> >> java.lang.IllegalStateException: _obtainOpenChannel -- >> com.webobjects.eoaccess.EODatabaseContext >> [EMAIL PROTECTED]: failed to open >> database channel. Check your connection dictionary, and ensure your >> database is correctly configured. >> >> I've tested the DB, and connection, and they are fine. It's just >> that WO doesn't like them. I can generate SQL from EOM as well. >> >> I've heard of the "index.eomodeld" file being corrupted, and that >> it may not have entries, or those entries may need to be rewritten. >> Right now this file is 99% blank, so I'm thinking this may be it. >> >> I'd appreciate any advice or the text of what is supposed to be >> included in that file. >> >> Thanks, >> jeremy >> ___ >> WebObjects-dev mailing list >> [EMAIL PROTECTED] >> http://www.omnigroup.com/mailman/listinfo/webobjects-dev >> > > ___ > Do not post admin requests to the list. They will be ignored. > Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/webobjects-dev/webobjects%40concyse.com > > This email sent to [EMAIL PROTECTED] ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: connection dictionary error?
If you're using FrontBase; I've found that 99,65% of the time I get this error, it's because I forgot to include the FrontBasePlugin framework in my project. Cheers, - Hugi On 26.10.2005, at 13:29, Jeremy Matthews wrote: When attempting to insert values into the database, I receive this WO error: java.lang.IllegalStateException: _obtainOpenChannel -- com.webobjects.eoaccess.EODatabaseContext [EMAIL PROTECTED]: failed to open database channel. Check your connection dictionary, and ensure your database is correctly configured. I've tested the DB, and connection, and they are fine. It's just that WO doesn't like them. I can generate SQL from EOM as well. I've heard of the "index.eomodeld" file being corrupted, and that it may not have entries, or those entries may need to be rewritten. Right now this file is 99% blank, so I'm thinking this may be it. I'd appreciate any advice or the text of what is supposed to be included in that file. Thanks, jeremy ___ WebObjects-dev mailing list [EMAIL PROTECTED] http://www.omnigroup.com/mailman/listinfo/webobjects-dev ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: connection dictionary error?
On Oct 26, 2005, at 6:29 AM, Jeremy Matthews wrote:
When attempting to insert values into the database, I receive this
WO error:
java.lang.IllegalStateException: _obtainOpenChannel --
com.webobjects.eoaccess.EODatabaseContext
[EMAIL PROTECTED]: failed to open
database channel. Check your connection dictionary, and ensure your
database is correctly configured.
I've tested the DB, and connection, and they are fine. It's just
that WO doesn't like them. I can generate SQL from EOM as well.
Can you browse data from within EOModeler? That's really the only
test that matters when it comes to testing connectivity.
I've heard of the "index.eomodeld" file being corrupted, and that
it may not have entries, or those entries may need to be rewritten.
Right now this file is 99% blank, so I'm thinking this may be it.
What do you mean, "99% blank"? There is 99 blank lines and 1 non-
blank line?
I'd appreciate any advice or the text of what is supposed to be
included in that file.
Here is an example:
{
EOModelVersion = "2.1";
adaptorName = JDBC;
connectionDictionary = {
URL = "";
driver = "";
password = "";
plugin = "";
username = "";
};
entities = (
{
className = "SomeClass";
name = SomeClass;
}
);
internalInfo = {};
userInfo = {
history = {
created = "2000-10-24 04:05:17 + by sacha";
lastSaved = "2000-10-24 04:05:17 + by sacha";
};
modificationDate = "2000-10-24 04:07:34 +";
};
}
Obviously, the URL, driver (optional), password, plugin (optional)
and username need to be something other than the empty string.
sacha
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Re: connection dictionary error?
Jeremy, Please don't cross post. Most of us are on both lists and don't really need two copies of the messages. :-) On Oct 26, 2005, at 6:29 AM, Jeremy Matthews wrote: When attempting to insert values into the database, I receive this WO error: java.lang.IllegalStateException: _obtainOpenChannel -- com.webobjects.eoaccess.EODatabaseContext [EMAIL PROTECTED]: failed to open database channel. Check your connection dictionary, and ensure your database is correctly configured. That can mean a number of things. EOF can be misleading in this area. I've tested the DB, and connection, and they are fine. It's just that WO doesn't like them. I can generate SQL from EOM as well. You can generate SQL or you can generate SQL and execute it against the database? Can you browse the database from EOModeler? Which OS are you using? Which IDE? I've heard of the "index.eomodeld" file being corrupted, and that it may not have entries, or those entries may need to be rewritten. Right now this file is 99% blank, so I'm thinking this may be it. Is this the one in the project or the one in the built .woa/.framework? What is the 1% that is not blank? If you open it in EOModeler and inspect the root node, what does the inspector say for the connection dictionary? If blank, try filling out the form. I'd appreciate any advice or the text of what is supposed to be included in that file. Filling it out in EOModeler is the easiest way to see what is correct. There is also an EOJDBCConnectionAnalyzer class in the source code for PracticalWebObjects which will usually pinpoint the problem. You can download the source from Apress.com. Chuck -- Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Web Based EOModeler?
On Oct 26, 2005, at 12:34 AM, Brendan Duddridge wrote: Hi Chuck, I believe that was a technology demonstration at WWDC maybe 3 or 4 years ago. I remember seeing it. It looked ok, but I prefer a desktop application for that sort of thing. Given a choice between a mythical, fully functional desktop app and something else that works _now_, which would you prefer? :-) Right now, I'd be pleased with even a command line tool that made cross model inheritance easier than in emacs. And that is probably what I will end up with. EOModeler does not seem too pleased with cross model inheritance from an installed framework when Xcode is not being used (even worse than before!). I would however like to see EOModeler extended to support more advanced fetch specifications. Something like 'group by', 'having', and sub-selects. I think that would be require changes to EOControl and EOAccess not EModeler, no? Chuck Brendan Duddridge | CTO | 403-277-5591 x24 | [EMAIL PROTECTED] ClickSpace Interactive Inc. Suite L100, 239 - 10th Ave. SE Calgary, AB T2G 0V9 http://www.clickspace.com While engaging EOModeler in battle last night over the spoils of some cross model inheritance and prototypes, I started to wonder how hard it would be to make an alternative tool. Other than emacs, I mean. Web based would be easiest, as far as creating the UI. Then I sort of recalled seeing this done before. Does this ring a bell with anyone? I may be thinking of Anjo Krank's DevStudio which, IIRC, allows inspection but not editing. Cheers, Chuck -- Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.http://www.global-village.net/products/ practical_webobjects -- Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Configuring ERChangeNotification/JMS Help needed
On Oct 26, 2005, at 5:13 AM, Wolfram Stebel wrote: Am 26.10.2005 12:11 Uhr schrieb "David Teran" unter <[EMAIL PROTECTED]>: Hi David, Thanks for your hints. 1. The reason why i do this is, that i hopefully will have a site with high traffic in the future, where i will need load balancing. But thats a minor reason! See David's comment, "If you ever use a lot of instances it will slow down everything". This might not be the best way to get you where you want to go. 2. I have 3 Applications working on the same database, i.e. they might change the same data entries concurrently. So deal with it. This framework will _not_ eliminate the need to handle concurrent editing issues. It will just _reduce_ the frequency of occurrence. ChangeNotification framework or not, you still have to code for these. One of the applications is an administrators app, two others are customers applications. The admin might change some values, that are very important for the customers, i.e. client aliases, which are also used for directory locations. When those change, the customer needs direct feedback of the change. What does direct feedback mean? They need a message to popup? An e- mail? Or just that they need to see fresh data. 3. I asked on this list how to handle this issue, and i was told to do what i'm now implementing. So, what other tips do you have? 1. Implement code to handle optimistic locking failures 2. Determine the data freshness requirements and implement refreshing fetches and new EC creation to meet those needs. Chuck Just a simple question: why do you want to use this framework? Is it really important for you? It cannot handle a lot of load, others mentioned to have strange deadlocks when using it and the best approach is: build your application in a way it does not need change notification as its error prone (imho). If you ever use a lot of instances it will slow down everything. If you ever have other applications which use the database (non WO apps) it will break your WO apps. If you ever use more than on EOF stack it will lead to unexpected results as change notification framework is only for one EOF stack. maybe there is another solution than using this framework. Explain a little bit why you want to use it, whats the problem with your current app? regards, David Am 26.10.2005 um 11:49 schrieb Wolfram Stebel: Hi list, i have three apps i want to talk between using ERChangeNotification via jms. i already got jms installed (0.7.6.1 on OSX 10.4.2) and linked the framework into my apps. i have a startupitem and can do the administrative start/stop via "sudo SystemStarter start OpenJMS" etc. without any error messages in console. The service seems to run after machine restart too, so i expect everything is well at first glance! Now i just wonder how to configure jms :-) i tried googling but found no essentials on it. My setup is: 1. In "Properties" file of all applications i have (as recommended): er.changenotification.entitiesNotToSynchronize = () er.changenotification.changeTypesToTrack = (inserted, updated, deleted) er.changenotification.jms.topicName = MyTopic er.changenotification.jms.durableSubscribers = false 2. In openjms.xml i have: in the following line there was "startjms.sh" wich does not exist and i replaced it by "startup.sh" and i wonder if the following block is correct or required anyway and i wonder if i can delete the following block or does someone need a user? 3. In "rmi_jms_jdbm.xml" i have: and i wonder if the following block is correct I hope, you gurus can help me :-) TIA ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/chill% 40global-village.net This email sent to [EMAIL PROTECTED] -- Coming in 2006 - an introduction to web applications using WebObjects and Xcode http://www.global-village.net/wointro Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.http://www.global-village.net/products/practical_webobjects ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
connection dictionary error?
When attempting to insert values into the database, I receive this WO error: java.lang.IllegalStateException: _obtainOpenChannel -- com.webobjects.eoaccess.EODatabaseContext [EMAIL PROTECTED]: failed to open database channel. Check your connection dictionary, and ensure your database is correctly configured. I've tested the DB, and connection, and they are fine. It's just that WO doesn't like them. I can generate SQL from EOM as well. I've heard of the "index.eomodeld" file being corrupted, and that it may not have entries, or those entries may need to be rewritten. Right now this file is 99% blank, so I'm thinking this may be it. I'd appreciate any advice or the text of what is supposed to be included in that file. Thanks, jeremy ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Configuring ERChangeNotification/JMS Help needed
Am 26.10.2005 14:03 Uhr schrieb "Jean-François Veillette" unter
<[EMAIL PROTECTED]>:
> I think the problem is with the configuration file.
Yes
> Somewhere under the ERChangeNotification directory, you should see a
> sample configuration file that you should use (at least as a starting
> point).
They are in the text below, only a little changed, to match my setup
> One important point is the topic name as it has to match the topic used
> by the app (as defined in the er framework).
> There is a default property defined in the Properties file of the
> framework, make sure it match whatever the openjms server is defined to
> serve.
As you will see, there are "MyTopic" entries below, where i dont know if
they are correct.
> You can customize both (server config to serve more than one topic, and
> each app so that not all woapp talk to each other). For example, we
Thats why i chose my own topic
> have a training system (3 apps, training bd) with a staging system (3
> apps, staging bd), both on the same server, but we do not want those
> apps to share notifications, so each have his own 'topic', as defined
> as a property at the application level.
Right, thats what i thought it would do.
But what about:
See below, search for and you will meet the problem-points!
As one more problem, there are failures in the demo files. See below under
"startjms.sh".
Thanks for your help
Wolfram
>> Hi list,
>>
>> i have three apps i want to talk between using ERChangeNotification
>> via jms.
>> i already got jms installed (0.7.6.1 on OSX 10.4.2) and linked the
>> framework
>> into my apps.
>> i have a startupitem and can do the administrative start/stop via "sudo
>> SystemStarter start OpenJMS" etc. without any error messages in
>> console.
>> The service seems to run after machine restart too, so i expect
>> everything
>> is well at first glance!
>>
>> Now i just wonder how to configure jms :-)
>> i tried googling but found no essentials on it.
>>
>> My setup is:
>>
>> 1.
>>
>> In "Properties" file of all applications i have (as recommended):
>>
>> er.changenotification.entitiesNotToSynchronize = ()
>> er.changenotification.changeTypesToTrack = (inserted, updated, deleted)
>> er.changenotification.jms.topicName = MyTopic
>> er.changenotification.jms.durableSubscribers = false
>>
>>
>> 2.
>>
>> In openjms.xml i have:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> in the following line there was "startjms.sh" wich does not exist
>> and i
>> replaced it by "startup.sh"
>>
>>
>>
>> and i wonder if the following block is correct or required anyway
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> and i wonder if i can delete the following block or does someone
>> need a
>> user?
>>
>>
>>
>>
>>
>>
>>
>> 3.
>>
>> In "rmi_jms_jdbm.xml" i have:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> >
>> in the following line there was "startjms.sh" wich does not exist
>> and i
>> replaced it by "startup.sh"
>>
>> script="${openjms.home}/bin/startup.sh"
>> config="${openjms.home}/config/rmi_jms_jdbm.xml" />
>>
>>
>> and i wonder if the following block is correct
>>
>>
>>
>>
___
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Re: Configuring ERChangeNotification/JMS Help needed
Am 26.10.2005 12:11 Uhr schrieb "David Teran" unter
<[EMAIL PROTECTED]>:
Hi David,
Thanks for your hints.
1. The reason why i do this is, that i hopefully will have a site with high
traffic in the future, where i will need load balancing.
But thats a minor reason!
2. I have 3 Applications working on the same database, i.e. they might
change the same data entries concurrently.
One of the applications is an administrators app, two others are customers
applications. The admin might change some values, that are very important
for the customers, i.e. client aliases, which are also used for directory
locations. When those change, the customer needs direct feedback of the
change.
3. I asked on this list how to handle this issue, and i was told to do what
i'm now implementing.
So, what other tips do you have?
TIA
Wolfram
> Just a simple question:
>
> why do you want to use this framework? Is it really important for
> you? It cannot handle a lot of load, others mentioned to have strange
> deadlocks when using it and the best approach is:
>
> build your application in a way it does not need change notification
> as its error prone (imho). If you ever use a lot of instances it will
> slow down everything. If you ever have other applications which use
> the database (non WO apps) it will break your WO apps. If you ever
> use more than on EOF stack it will lead to unexpected results as
> change notification framework is only for one EOF stack.
>
> maybe there is another solution than using this framework. Explain a
> little bit why you want to use it, whats the problem with your
> current app?
>
> regards, David
>
>
> Am 26.10.2005 um 11:49 schrieb Wolfram Stebel:
>
>> Hi list,
>>
>> i have three apps i want to talk between using ERChangeNotification
>> via jms.
>> i already got jms installed (0.7.6.1 on OSX 10.4.2) and linked the
>> framework
>> into my apps.
>> i have a startupitem and can do the administrative start/stop via
>> "sudo
>> SystemStarter start OpenJMS" etc. without any error messages in
>> console.
>> The service seems to run after machine restart too, so i expect
>> everything
>> is well at first glance!
>>
>> Now i just wonder how to configure jms :-)
>> i tried googling but found no essentials on it.
>>
>> My setup is:
>>
>> 1.
>>
>> In "Properties" file of all applications i have (as recommended):
>>
>> er.changenotification.entitiesNotToSynchronize = ()
>> er.changenotification.changeTypesToTrack = (inserted, updated,
>> deleted)
>> er.changenotification.jms.topicName = MyTopic
>> er.changenotification.jms.durableSubscribers = false
>>
>>
>> 2.
>>
>> In openjms.xml i have:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> in the following line there was "startjms.sh" wich does not
>> exist and i
>> replaced it by "startup.sh"
>>
>>
>>
>> and i wonder if the following block is correct or required anyway
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> and i wonder if i can delete the following block or does
>> someone need a
>> user?
>>
>>
>>
>>
>>
>>
>>
>> 3.
>>
>> In "rmi_jms_jdbm.xml" i have:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> >
>> in the following line there was "startjms.sh" wich does not
>> exist and i
>> replaced it by "startup.sh"
>>
>> script="${openjms.home}/bin/startup.sh"
>> config="${openjms.home}/config/rmi_jms_jdbm.xml" />
>>
>>
>> and i wonder if the following block is correct
>>
>>
>>
>>
>>
>>
>>
>> I hope, you gurus can help me :-)
>>
>> TIA
>>
___
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Re: Configuring ERChangeNotification/JMS Help needed
I think the problem is with the configuration file.
Somewhere under the ERChangeNotification directory, you should see a
sample configuration file that you should use (at least as a starting
point).
One important point is the topic name as it has to match the topic used
by the app (as defined in the er framework).
There is a default property defined in the Properties file of the
framework, make sure it match whatever the openjms server is defined to
serve.
You can customize both (server config to serve more than one topic, and
each app so that not all woapp talk to each other). For example, we
have a training system (3 apps, training bd) with a staging system (3
apps, staging bd), both on the same server, but we do not want those
apps to share notifications, so each have his own 'topic', as defined
as a property at the application level.
- jfv
Le 05-10-26, à 05:49, Wolfram Stebel a écrit :
Hi list,
i have three apps i want to talk between using ERChangeNotification
via jms.
i already got jms installed (0.7.6.1 on OSX 10.4.2) and linked the
framework
into my apps.
i have a startupitem and can do the administrative start/stop via "sudo
SystemStarter start OpenJMS" etc. without any error messages in
console.
The service seems to run after machine restart too, so i expect
everything
is well at first glance!
Now i just wonder how to configure jms :-)
i tried googling but found no essentials on it.
My setup is:
1.
In "Properties" file of all applications i have (as recommended):
er.changenotification.entitiesNotToSynchronize = ()
er.changenotification.changeTypesToTrack = (inserted, updated, deleted)
er.changenotification.jms.topicName = MyTopic
er.changenotification.jms.durableSubscribers = false
2.
In openjms.xml i have:
in the following line there was "startjms.sh" wich does not exist
and i
replaced it by "startup.sh"
and i wonder if the following block is correct or required anyway
and i wonder if i can delete the following block or does someone
need a
user?
3.
In "rmi_jms_jdbm.xml" i have:
in the following line there was "startjms.sh" wich does not exist
and i
replaced it by "startup.sh"
script="${openjms.home}/bin/startup.sh"
config="${openjms.home}/config/rmi_jms_jdbm.xml" />
and i wonder if the following block is correct
I hope, you gurus can help me :-)
TIA
Wolfram
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Re: Configuring ERChangeNotification/JMS Help needed
Just a simple question:
why do you want to use this framework? Is it really important for
you? It cannot handle a lot of load, others mentioned to have strange
deadlocks when using it and the best approach is:
build your application in a way it does not need change notification
as its error prone (imho). If you ever use a lot of instances it will
slow down everything. If you ever have other applications which use
the database (non WO apps) it will break your WO apps. If you ever
use more than on EOF stack it will lead to unexpected results as
change notification framework is only for one EOF stack.
maybe there is another solution than using this framework. Explain a
little bit why you want to use it, whats the problem with your
current app?
regards, David
Am 26.10.2005 um 11:49 schrieb Wolfram Stebel:
Hi list,
i have three apps i want to talk between using ERChangeNotification
via jms.
i already got jms installed (0.7.6.1 on OSX 10.4.2) and linked the
framework
into my apps.
i have a startupitem and can do the administrative start/stop via
"sudo
SystemStarter start OpenJMS" etc. without any error messages in
console.
The service seems to run after machine restart too, so i expect
everything
is well at first glance!
Now i just wonder how to configure jms :-)
i tried googling but found no essentials on it.
My setup is:
1.
In "Properties" file of all applications i have (as recommended):
er.changenotification.entitiesNotToSynchronize = ()
er.changenotification.changeTypesToTrack = (inserted, updated,
deleted)
er.changenotification.jms.topicName = MyTopic
er.changenotification.jms.durableSubscribers = false
2.
In openjms.xml i have:
in the following line there was "startjms.sh" wich does not
exist and i
replaced it by "startup.sh"
and i wonder if the following block is correct or required anyway
and i wonder if i can delete the following block or does
someone need a
user?
3.
In "rmi_jms_jdbm.xml" i have:
in the following line there was "startjms.sh" wich does not
exist and i
replaced it by "startup.sh"
script="${openjms.home}/bin/startup.sh"
config="${openjms.home}/config/rmi_jms_jdbm.xml" />
and i wonder if the following block is correct
I hope, you gurus can help me :-)
TIA
Wolfram
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Configuring ERChangeNotification/JMS Help needed
Hi list, i have three apps i want to talk between using ERChangeNotification via jms. i already got jms installed (0.7.6.1 on OSX 10.4.2) and linked the framework into my apps. i have a startupitem and can do the administrative start/stop via "sudo SystemStarter start OpenJMS" etc. without any error messages in console. The service seems to run after machine restart too, so i expect everything is well at first glance! Now i just wonder how to configure jms :-) i tried googling but found no essentials on it. My setup is: 1. In "Properties" file of all applications i have (as recommended): er.changenotification.entitiesNotToSynchronize = () er.changenotification.changeTypesToTrack = (inserted, updated, deleted) er.changenotification.jms.topicName = MyTopic er.changenotification.jms.durableSubscribers = false 2. In openjms.xml i have: in the following line there was "startjms.sh" wich does not exist and i replaced it by "startup.sh" and i wonder if the following block is correct or required anyway and i wonder if i can delete the following block or does someone need a user? 3. In "rmi_jms_jdbm.xml" i have: and i wonder if the following block is correct I hope, you gurus can help me :-) TIA Wolfram ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
Re: Web Based EOModeler?
Hi Chuck,I believe that was a technology demonstration at WWDC maybe 3 or 4 years ago. I remember seeing it. It looked ok, but I prefer a desktop application for that sort of thing. I would however like to see EOModeler extended to support more advanced fetch specifications. Something like 'group by', 'having', and sub-selects. Brendan Duddridge | CTO | 403-277-5591 x24 | [EMAIL PROTECTED] ClickSpace Interactive Inc. Suite L100, 239 - 10th Ave. SE Calgary, AB T2G 0V9 http://www.clickspace.com While engaging EOModeler in battle last night over the spoils of somecross model inheritance and prototypes, I started to wonder how hardit would be to make an alternative tool. Other than emacs, I mean.Web based would be easiest, as far as creating the UI. Then I sortof recalled seeing this done before. Does this ring a bell withanyone? I may be thinking of Anjo Krank's DevStudio which, IIRC,allows inspection but not editing.Cheers,Chuck-- Coming in 2006 - an introduction to web applications using WebObjectsand Xcode http://www.global-village.net/wointroPractical WebObjects - for developers who want to increase theiroverall knowledge of WebObjects or who are trying to solve specificproblems. http://www.global-village.net/products/practical_webobjects smime.p7s Description: S/MIME cryptographic signature ___ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to archive@mail-archive.com
