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• How to break a Hibernate session?

  - by Péter Török

  In the Hibernate reference, it is stated several times that All exceptions thrown by Hibernate are fatal. This means you have to roll back the database transaction and close the current Session. You aren’t allowed to continue working with a Session that threw an exception. One of our legacy apps uses a single session to update/insert many records from files into a DB table. Each recourd update/insert is done in a separate transaction, which is then duly committed (or rolled back in case an error occurred). Then for the next record a new transaction is opened etc. But the same session is used throughout the whole process, even if a HibernateException was caught in the middle. We are using Oracle 9i btw with Hibernate 3.24.sp1 on JBoss 4.2. Reading the above in the book, I realized that this design may fail. So I refactored the app to use a separate session for each record update. In a unit test with a mock session factory, I could prove that it is now requesting a new session for each record update. So far, so good. However, we found no way to reproduce the session failure while testing the whole app (would this be a stress test btw, or ...?). We thought of shutting down the listener of the DB but we realized that the app is keeping a bunch of connections open to the DB, and the listener would not affect those connections. (This is a web app, activated once every night by a scheduler, but it can also be activated via the browser.) Then we tried to kill some of those connections in the DB while the app was processing updates - this resulted in some failed updates, but then the app happily continued. Apparently Hibernate is clever enough to reopen broken connections under the hood without breaking the whole session. So this might not be a critical issue, as our app seems to be robust enough even in its original form. However, the issue keeps bugging me. I would like to know: Under what circumstances does the Hibernate session really become unusable after a HibernateException was thrown? How to reproduce this in a test? (What's the proper term for such a test?)

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• How can I resolve this one application coming up with an "You don't have permission to use the application" error?

  - by morgant

  I've got a Mac OS X 10.6 Snow Leopard Server Open Directory Master with a user who's getting Mobility & Application managed preferences from a group (the only group they're a member of). The workstation is also running Mac OS X 10.6 Snow Leopard, when the user logs in and tries to run our primary application which they're explicitly allowed to run (via the group's preferences), it says "You don't have permission to use the application 'Blah'". Now, the application is added to the group's list of always allowed applications, unsigned (so a minor difference in application version or file contents shouldn't disallow it). It even lives in a subdirectory of /Applications which is in the list of folders to allow applications. I've run into this when logging this user into new workstations and the following usually works: Log them out Remove the following files from their mobile home folder on the workstation: /Library/Managed\ Preferences/, ~/.FileSync, ~/Library/Preferences/com.apple.finder.plist, and ~/Library/Preferences/com.apple.MCX.plist. Remove the following files from their network home folder on the server: ~/.FileSync, ~/Library/Preferences/com.apple.finder.plist, and ~/Library/Preferences/com.apple.MCX.plist. Log them back in on the workstation. However, this no longer resolves the issue. Their Home Sync preferences are set (on the group) to sync ~, but not the following files (manually, at login, and at logout... no background sync here): ~/.SymAVQSFile ~/NAVMac800QSFile ~/Library ~/.FileSync ~/.account Their Preferences Sync preferences are set (also on the group) to sync ~/Library & ~/Documents/Microsoft User Data, but not the following files (also manually, at login, and at logout... no background sync): ~/.SymAVQSFile ~/.Trash ~/.Trashes ~/Documents/Microsoft User Data/Entourage Temp ~/Library/Application Support/SyncServices ~/Library/Application Support/MobileSync ~/Library/Caches ~/Library/Calendars/Calendar Cache ~/Library/Logs ~/Library/Mail/AvailableFeeds ~/Library/Mail/Envelope Index ~/Library/Preferences/Macromedia/ ~/Library/Printers ~/Library/PubSub/Database ~/Library/PubSub/Downloads ~/Library/PubSub/Feeds ~/Library/Safari/Icons.db ~/Library/Safari/HistoryIndex.sk ~/Library/iTunes/iPhone Software Updates IMAP-* Exchange-* EWS-* Mac-* ~/Library/Preferences/ByHost ~/Library/Preferences/com.apple.dock.plist ~/Library/Preferences/com.apple.sitebarlists.plist ~/Library/Application Support/4D ~/Library/Preferences/com.apple.MCX.plist ~/.FileSync ~/.account Even with ~/Library/Preferences/com.apple.MCX.plist prevented from syncing during a Preferences Sync, it still seems to show up in the network home on the server frequently. Are there any other files other than ~/Library/Preferences/com.apple.MCX.plist that contain application Managed Preferences that might be causing this one app to be showing up as not allowed? Any ideas on how ~/Library/Preferences/com.apple.MCX.plist keeps getting sync'd back up the network home folder on the server? Update: I thought I had found a workaround this morning, but it also seemed to be extremely temporary. Basically, loking at /Library/Managed\ Preferences/[shortname]/com.apple.applicationaccess.new.plist I discovered that it didn't have an entry for the application in question, but /Library/Managed\ Preferences/[shortname]/complete.plist did. Naturally, I deleted com.apple.applicationaccess.new.plist, logged in again, and it worked... on one workstation. It failed on others, and after logging out & back in a couple more times it started failing on all of them again, even after further deletions of com.apple.applicationaccess.new.plist. Oddly, com.apple.applicationaccess.new.plist & complete.plist do both contain an entry for the application in question now, but it still says it's not allowed. Further Update: Okay, so I now have a reproducible workaround which seems to be required after every reboot of the workstation: Log in as the user (you'll discover you cannot launch the application in question). Fast User Switch to the local admin account on the workstation (we always have one on every machine). From that local admin account, run sudo mcxrefresh -n 'shortname' (logging out and back in as the user in question will not work). Fast User Switch back to the user (you'll still not be allowed to run the application). Log the user out and back in (you'll now be able to run the application in question.) Fast User Switch back to the local admin account, log it out, and log back in as the user in question. If you do all that exactly as described it'll keep working through log out & log back in, but NOT through a reboot. If, after a reboot, you try something like logging in as the local admin account, running sudo mcxrefresh -n 'shortname', logging out, then logging in as the user in question, it will NOT work. Yet Another Update We don't have any computer groups in our Open Directory, so it shouldn't be getting any conflicting settings from there. I ran sudo mcxquery -format xml -user shortname -group groupname before & after performing the aforementioned process to allow the application in question to be run and the results were identical (saved the result to files & diff'd... I'm not just guessing here). One Step Forward, Half a Step Back: When the Mac OS X 10.6.5 Server update was released, we upgraded our Open Directory Master to it as the changes included the following managed preferences fixes which I hoped might address this issue: Addresses an issue that could prevent managed preferences from being applied when a user logs in on a workstation that has been idle. Fixes an issue that could prevent administrators from bypassing client management settings on a workstation. This seemed to improve the situation slightly. The application in question now usually launches without error. If, and when it does launch with the "You don't have permission to use the application" error, logging the user out and back in seems to correct it. That said, we've since had to add a couple of applications to the user's ~/Applications/ directory and those are still prevented from launching. The workstations are running Mac OS X 10.6.4, the OD Master (which the workstations are bound to) is running Mac OS 10.6.5 Server (although there are two OD Replicas still running 10.6.4 Server), and we're using Workgroup Manager 10.6.3 (which is included with the Server Admin Tools 10.6.5 upgrade) to add the applications (unsigned, as always). This time, I've caught the following in /var/log/system.log when attempting to launch one of the allowed applications from ~/Applications: Dec 22 17:36:24 hostname parentalcontrolsd[43221]: -[ActivityTracker checkApp:csFlags:] [954:username] -- *** Incoming app appears to be masquerading as white listed app and failed signature validation: /Users/username/Applications/FileMaker Pro 5.5/FileMaker Pro.app/Contents/MacOS/FileMaker Pro. Note: This may be a valid app of a different version than what was whitelisted (on a different volume?) Dec 22 17:36:24 hostname [0x0-0xa42a42].com.filemaker.filemakerpro[43304]: launch of /Users/username/Applications/FileMaker Pro 5.5/FileMaker Pro.app/Contents/MacOS/FileMaker Pro was blocked Dec 22 17:36:24 hostname com.apple.launchd.peruser.1340[6375] ([0x0-0xa42a42].com.filemaker.filemakerpro[43304]): Exited with exit code: 255 Dec 22 17:36:24 hostname parentalcontrolsd[43221]: -[ActivityTracker(Private) _removeAppFromWhiteList:] [1362:username] -- *** Couldn't find local user record Running sudo mcxquery -format xml -user username -group groupname includes the following entry for FileMaker Pro 5.5 (and appears to include a full integration of the user's application whitelist & group's application whitelist): <dict> <key>bundleID</key> <string>com.filemaker.filemakerpro</string> <key>displayName</key> <string>FileMaker Pro</string> </dict> Note the lack of <key>appID</key><data> ... </data> which seems to specify a signed application. While whitelisted directories also appear to be correctly listed in the results, they too do not actually allow the applications to be run either. What is going on here?! Where else should I be looking?

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• Build path issues learning Guice

  - by Preston

  I can't figure out why I'm getting this error below I have included all the appropriate jars as far as I can tell(I have included eclipses .classpath file below.) All of the classpath entries resolve just fine. What am I missing? The type javax.servlet.ServletContextListener cannot be resolved. It is indirectly referenced from required .class files on the "extends GuiceServletContextListener" line - import com.google.inject.Guice; import com.google.inject.Injector; import com.google.inject.servlet.GuiceServletContextListener; import com.google.inject.servlet.ServletModule; public class ServletConfig extends GuiceServletContextListener { @Override protected Injector getInjector() { return Guice.createInjector(new ServletModule(){ @Override protected void configureServlets() { // TODO: add necessary code to bind } }); } } .Classpath <?xml version="1.0" encoding="UTF-8"?> <classpath> <classpathentry kind="src" path="src"/> <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jdk1.7.0_21"> <attributes> <attribute name="owner.project.facets" value="java"/> </attributes> </classpathentry> <classpathentry kind="con" path="oracle.eclipse.tools.glassfish.lib.system"> <attributes> <attribute name="owner.project.facets" value="jst.web"/> </attributes> </classpathentry> <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container"/> <classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container"/> <classpathentry kind="lib" path="guice-3.0/aopalliance.jar"/> <classpathentry kind="lib" path="guice-3.0/guice-3.0.jar"/> <classpathentry kind="lib" path="guice-3.0/guice-servlet-3.0.jar"/> <classpathentry kind="lib" path="guice-3.0/javax.inject.jar"/> <classpathentry kind="output" path="build/classes"/> </classpath>

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• Making hovor state of hidden list visible when page is active

  - by Joel

  Hi guys, One day I hope to not be such a newbie on this stuff, but some of this feels so insurmountable sometimes! OK. I have a nav bar with hidden li items that are visible when hovered over. Here's the live site: http://www.rattletree.com Here's the code for the nav: <ul id="navbar"> <li id="iex"><a href="index.php">About Rattletree</a></li> <li id="upcomgshows"><a href="upcomingshows.php">Calendar</a></li> <li id="sods"><a href="#">Sights &amp; Sounds</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png" alt="" /></li> <li class="innerlist"><a href="/playlist.m3u" target="_blank" onclick="javascript:BatmoAudioPop('Rattletree Marimba',this.href,'1'); return false">Listen</a></li> <li class="innerlist"><a href="/new_pictures.php">Photos</a></li> <li class="innerlist"><a href="/video.php">Video</a></li> <li class="innerlist"><a href="/press.php">Press</a></li> </ul> </li> <li id="bookin"><a href="#">Contact</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png" alt="" /></li> <li class="innerlist"><a href="/booking.php">Booking Info</a></li> <li class="innerlist"><a href="/media.php">Media Inquiries</a></li> </ul> </li> <li id="ste"> <a href="/sounds.php">Store</a></li> <li id="instrumes"><a href="/instruments.php">The Instruments</a></li> <li id="classe"><a href="classes.php">Workshops</a></li> </ul> css: div#navbar2 { background-color:#546F8B; border-bottom:1px solid #546F8B; border-top:1px solid #000000; display:inline-block; position:relative; width:100%; } div#navbar2 ul#navbar { color:#FFFFFF; font-family:Arial,Helvetica,sans-serif; font-size:16px; letter-spacing:1px; margin:10px 0; padding:0; white-space:nowrap; } div#navbar2 ul#navbar li ul.innerlist { color:#000000; display:none; position:relative; z-index:20; } div#navbar2 ul#navbar li { display:inline; list-style-type:none; margin:0; padding:0; position:relative; } Now it's a bit tricky what I want to do: If a user navigates to one of the innerlist pages, I'd like that innerlist ul to remain visible (with the specific li displaying the hovered state). Now I think I could figure that out on my own, but you can see on the live page that if the user is on a page from the innerlist and that list was visible, then if they hovered over the other nav tab, then those innerlists would overlap. This is a problem. Hopefully that last sentence makes sense! In short: I need to keep the inner list of the active page displaying, BUT if the user hovers over another nav button WITH it's own inner list, then the live innerlist needs to disappear. Clear as mud?

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• NHibernate (3.1.0.4000) NullReferenceException using Query<> and NHibernate Facility

  - by TigerShark

  I have a problem with NHibernate, I can't seem to find any solution for. In my project I have a simple entity (Batch), but whenever I try and run the following test, I get an exception. I've triede a couple of different ways to perform a similar query, but almost identical exception for all (it differs in which LINQ method being executed). The first test: [Test] public void QueryLatestBatch() { using (var session = SessionManager.OpenSession()) { var batch = session.Query<Batch>() .FirstOrDefault(); Assert.That(batch, Is.Not.Null); } } The exception: System.NullReferenceException : Object reference not set to an instance of an object. at NHibernate.Linq.NhQueryProvider.PrepareQuery(Expression expression, ref IQuery query, ref NhLinqExpression nhQuery) at NHibernate.Linq.NhQueryProvider.Execute(Expression expression) at System.Linq.Queryable.FirstOrDefault(IQueryable`1 source) The second test: [Test] public void QueryLatestBatch2() { using (var session = SessionManager.OpenSession()) { var batch = session.Query<Batch>() .OrderBy(x => x.Executed) .Take(1) .SingleOrDefault(); Assert.That(batch, Is.Not.Null); } } The exception: System.NullReferenceException : Object reference not set to an instance of an object. at NHibernate.Linq.NhQueryProvider.PrepareQuery(Expression expression, ref IQuery query, ref NhLinqExpression nhQuery) at NHibernate.Linq.NhQueryProvider.Execute(Expression expression) at System.Linq.Queryable.SingleOrDefault(IQueryable`1 source) However, this one is passing (using QueryOver<): [Test] public void QueryOverLatestBatch() { using (var session = SessionManager.OpenSession()) { var batch = session.QueryOver<Batch>() .OrderBy(x => x.Executed).Asc .Take(1) .SingleOrDefault(); Assert.That(batch, Is.Not.Null); Assert.That(batch.Executed, Is.LessThan(DateTime.Now)); } } Using the QueryOver< API is not bad at all, but I'm just kind of baffled that the Query< API isn't working, which is kind of sad, since the First() operation is very concise, and our developers really enjoy LINQ. I really hope there is a solution to this, as it seems strange if these methods are failing such a simple test. EDIT I'm using Oracle 11g, my mappings are done with FluentNHibernate registered through Castle Windsor with the NHibernate Facility. As I wrote, the odd thing is that the query works perfectly with the QueryOver< API, but not through LINQ.

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• What are the benefits of using ORM over XML Serialization/Deserialization?

  - by Tequila Jinx

  I've been reading about NHibernate and Microsoft's Entity Framework to perform Object Relational Mapping against my data access layer. I'm interested in the benefits of having an established framework to perform ORM, but I'm curious as to the performance costs of using it against standard XML Serialization and Deserialization. Right now, I develop stored procedures in Oracle and SQL Server that use XML Types for either input or output parameters and return or shred XML depending on need. I use a custom database command object that uses generics to deserialize the XML results into a specified serializable class. By using a combination of generics, xml (de)serialization and Microsoft's DAAB, I've got a process that's fairly simple to develop against regardless of the data source. Moreover, since I exclusively use Stored Procedures to perform database operations, I'm mostly protected from changes in the data structure. Here's an over-simplified example of what I've been doing. static void main() { testXmlClass test = new test(1); test.Name = "Foo"; test.Save(); } // Example Serializable Class ------------------------------------------------ [XmlRootAttribute("test")] class testXmlClass() { [XmlElement(Name="id")] public int ID {set; get;} [XmlElement(Name="name")] public string Name {set; get;} //create an instance of the class loaded with data. public testXmlClass(int id) { GenericDBProvider db = new GenericDBProvider(); this = db.ExecuteSerializable("myGetByIDProcedure"); } //save the class to the database... public Save() { GenericDBProvider db = new GenericDBProvider(); db.AddInParameter("myInputParameter", DbType.XML, this); db.ExecuteSerializableNonQuery("mySaveProcedure"); } } // Database Handler ---------------------------------------------------------- class GenericDBProvider { public T ExecuteSerializable<T>(string commandText) where T : class { XmlSerializer xml = new XmlSerializer(typeof(T)); // connection and command code is assumed for the purposes of this example. // the final results basically just come down to... return xml.Deserialize(commandResults) as T; } public void ExecuteSerializableNonQuery(string commandText) { // once again, connection and command code is assumed... // basically, just execute the command along with the specified // parameters which have been serialized. } public void AddInParameter(string name, DbType type, object value) { StringWriter w = new StringWriter(); XmlSerializer x = new XmlSerializer(value.GetType()); //handle serialization for serializable classes. if (type == DbType.Xml && (value.GetType() != typeof(System.String))) { x.Serialize(w, value); w.Close(); // store serialized object in a DbParameterCollection accessible // to my other methods. } else { //handle all other parameter types } } } I'm starting a new project which will rely heavily on database operations. I'm very curious to know whether my current practices will be sustainable in a high-traffic situation and whether or not I should consider switching to NHibernate or Microsoft's Entity Framework to perform what essentially seems to boil down to the same thing I'm currently doing. I appreciate any advice you may have.

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• Best Practices / Patterns for Enterprise Protection/Remediation of SSNs (Social Security Numbers)

  - by Erik Neu

  I am interested in hearing about enterprise solutions for SSN handling. (I looked pretty hard for any pre-existing post on SO, including reviewing the terriffic SO automated "Related Questions" list, and did not find anything, so hopefully this is not a repeat.) First, I think it is important to enumerate the reasons systems/databases use SSNs: (note—these are reasons for de facto current state—I understand that many of them are not good reasons) Required for Interaction with External Entities. This is the most valid case—where external entities your system interfaces with require an SSN. This would typically be government, tax and financial. SSN is used to ensure system-wide uniqueness. SSN has become the default foreign key used internally within the enterprise, to perform cross-system joins. SSN is used for user authentication (e.g., log-on) The enterprise solution that seems optimum to me is to create a single SSN repository that is accessed by all applications needing to look up SSN info. This repository substitutes a globally unique, random 9-digit number (ASN) for the true SSN. I see many benefits to this approach. First of all, it is obviously highly backwards-compatible—all your systems "just" have to go through a major, synchronized, one-time data-cleansing exercise, where they replace the real SSN with the alternate ASN. Also, it is centralized, so it minimizes the scope for inspection and compliance. (Obviously, as a negative, it also creates a single point of failure.) This approach would solve issues 2 and 3, without ever requiring lookups to get the real SSN. For issue #1, authorized systems could provide an ASN, and be returned the real SSN. This would of course be done over secure connections, and the requesting systems would never persist the full SSN. Also, if the requesting system only needs the last 4 digits of the SSN, then that is all that would ever be passed. Issue #4 could be handled the same way as issue #1, though obviously the best thing would be to move away from having users supply an SSN for log-on. There are a couple of papers on this: UC Berkely: http://bit.ly/bdZPjQ Oracle Vault: bit.ly/cikbi1

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• Complex relationship between tables in NHibernate

  - by Ilya Kogan

  Hi all, I'm writing a Fluent NHibernate mapping for a legacy Oracle database. The challenge is that the tables have composite primary keys. If I were at total freedom, I would redesign the relationships and auto-generate primary keys, but other applications must write to the same database and read from it, so I cannot do it. These are the two tables I'll focus on: Example data Trips table: 1, 10:00, 11:00 ... 1, 12:00, 15:00 ... 1, 16:00, 19:00 ... 2, 12:00, 13:00 ... 3, 9:00, 18:00 ... Faults table: 1, 13:00 ... 1, 23:00 ... 2, 12:30 ... In this case, vehicle 1 made three trips and has two faults. The first fault happened during the second trip, and the second fault happened while the vehicle was resting. Vehicle 2 had one trip, during which a fault happened. Constraints Trips of the same vehicle never overlap. So the tables have an optional one-to-many relationship, because every fault either happens during a trip or it doesn't. If I wanted to join them in SQL, I would write: select ... from Faults left outer join Trips on Faults.VehicleId = Trips.VehicleId and Faults.FaultTime between Trips.TripStartTime and Trips.TripEndTime and then I'd get a dataset where every fault appears exactly once (one-to-many as I said). Note that there is no Vehicles table, and I don't need one. But I did create a view that contains all VehicleIds from both tables, so I can use it as a junction table. What am I actually looking for? The tables are huge because they cover years of data, and every time I only need to fetch a range of a few hours. So I need a mapping and a criteria that will run something like the following SQL underneath: select ... from Faults left outer join Trips on Faults.VehicleId = Trips.VehicleId and Faults.FaultTime between Trips.TripStartTime and Trips.TripEndTime where Faults.FaultTime between :p0 and :p1 Do you have any ideas how to achieve it? Note 1: Currently the application shouldn't write to the database, so persistence is not a must, although if the mapping supports persistence, it may help at some point in the future. Note 2: I know it's a tough one, so if you give me a great answer, you will be properly rewarded :) Thank you for reading this long question, and now I only hope for the best :)

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• How can I resolve this one application coming up with an "You don't have permission to use the application" error?

  - by morgant

  I've got a Mac OS X 10.6 Snow Leopard Server Open Directory Master with a user who's getting Mobility & Application managed preferences from a group (the only group they're a member of). The workstation is also running Mac OS X 10.6 Snow Leopard, when the user logs in and tries to run our primary application which they're explicitly allowed to run (via the group's preferences), it says "You don't have permission to use the application 'Blah'". Now, the application is added to the group's list of always allowed applications, unsigned (so a minor difference in application version or file contents shouldn't disallow it). It even lives in a subdirectory of /Applications which is in the list of folders to allow applications. I've run into this when logging this user into new workstations and the following usually works: Log them out Remove the following files from their mobile home folder on the workstation: /Library/Managed\ Preferences/, ~/.FileSync, ~/Library/Preferences/com.apple.finder.plist, and ~/Library/Preferences/com.apple.MCX.plist. Remove the following files from their network home folder on the server: ~/.FileSync, ~/Library/Preferences/com.apple.finder.plist, and ~/Library/Preferences/com.apple.MCX.plist. Log them back in on the workstation. However, this no longer resolves the issue. Their Home Sync preferences are set (on the group) to sync ~, but not the following files (manually, at login, and at logout... no background sync here): ~/.SymAVQSFile ~/NAVMac800QSFile ~/Library ~/.FileSync ~/.account Their Preferences Sync preferences are set (also on the group) to sync ~/Library & ~/Documents/Microsoft User Data, but not the following files (also manually, at login, and at logout... no background sync): ~/.SymAVQSFile ~/.Trash ~/.Trashes ~/Documents/Microsoft User Data/Entourage Temp ~/Library/Application Support/SyncServices ~/Library/Application Support/MobileSync ~/Library/Caches ~/Library/Calendars/Calendar Cache ~/Library/Logs ~/Library/Mail/AvailableFeeds ~/Library/Mail/Envelope Index ~/Library/Preferences/Macromedia/ ~/Library/Printers ~/Library/PubSub/Database ~/Library/PubSub/Downloads ~/Library/PubSub/Feeds ~/Library/Safari/Icons.db ~/Library/Safari/HistoryIndex.sk ~/Library/iTunes/iPhone Software Updates IMAP-* Exchange-* EWS-* Mac-* ~/Library/Preferences/ByHost ~/Library/Preferences/com.apple.dock.plist ~/Library/Preferences/com.apple.sitebarlists.plist ~/Library/Application Support/4D ~/Library/Preferences/com.apple.MCX.plist ~/.FileSync ~/.account Even with ~/Library/Preferences/com.apple.MCX.plist prevented from syncing during a Preferences Sync, it still seems to show up in the network home on the server frequently. Are there any other files other than ~/Library/Preferences/com.apple.MCX.plist that contain application Managed Preferences that might be causing this one app to be showing up as not allowed? Any ideas on how ~/Library/Preferences/com.apple.MCX.plist keeps getting sync'd back up the network home folder on the server? Update: I thought I had found a workaround this morning, but it also seemed to be extremely temporary. Basically, loking at /Library/Managed\ Preferences/[shortname]/com.apple.applicationaccess.new.plist I discovered that it didn't have an entry for the application in question, but /Library/Managed\ Preferences/[shortname]/complete.plist did. Naturally, I deleted com.apple.applicationaccess.new.plist, logged in again, and it worked... on one workstation. It failed on others, and after logging out & back in a couple more times it started failing on all of them again, even after further deletions of com.apple.applicationaccess.new.plist. Oddly, com.apple.applicationaccess.new.plist & complete.plist do both contain an entry for the application in question now, but it still says it's not allowed. Further Update: Okay, so I now have a reproducible workaround which seems to be required after every reboot of the workstation: Log in as the user (you'll discover you cannot launch the application in question). Fast User Switch to the local admin account on the workstation (we always have one on every machine). From that local admin account, run sudo mcxrefresh -n 'shortname' (logging out and back in as the user in question will not work). Fast User Switch back to the user (you'll still not be allowed to run the application). Log the user out and back in (you'll now be able to run the application in question.) Fast User Switch back to the local admin account, log it out, and log back in as the user in question. If you do all that exactly as described it'll keep working through log out & log back in, but NOT through a reboot. If, after a reboot, you try something like logging in as the local admin account, running sudo mcxrefresh -n 'shortname', logging out, then logging in as the user in question, it will NOT work. Yet Another Update We don't have any computer groups in our Open Directory, so it shouldn't be getting any conflicting settings from there. I ran sudo mcxquery -format xml -user shortname -group groupname before & after performing the aforementioned process to allow the application in question to be run and the results were identical (saved the result to files & diff'd... I'm not just guessing here). One Step Forward, Half a Step Back: When the Mac OS X 10.6.5 Server update was released, we upgraded our Open Directory Master to it as the changes included the following managed preferences fixes which I hoped might address this issue: Addresses an issue that could prevent managed preferences from being applied when a user logs in on a workstation that has been idle. Fixes an issue that could prevent administrators from bypassing client management settings on a workstation. This seemed to improve the situation slightly. The application in question now usually launches without error. If, and when it does launch with the "You don't have permission to use the application" error, logging the user out and back in seems to correct it. That said, we've since had to add a couple of applications to the user's ~/Applications/ directory and those are still prevented from launching. The workstations are running Mac OS X 10.6.4, the OD Master (which the workstations are bound to) is running Mac OS 10.6.5 Server (although there are two OD Replicas still running 10.6.4 Server), and we're using Workgroup Manager 10.6.3 (which is included with the Server Admin Tools 10.6.5 upgrade) to add the applications (unsigned, as always). This time, I've caught the following in /var/log/system.log when attempting to launch one of the allowed applications from ~/Applications: Dec 22 17:36:24 hostname parentalcontrolsd[43221]: -[ActivityTracker checkApp:csFlags:] [954:username] -- *** Incoming app appears to be masquerading as white listed app and failed signature validation: /Users/username/Applications/FileMaker Pro 5.5/FileMaker Pro.app/Contents/MacOS/FileMaker Pro. Note: This may be a valid app of a different version than what was whitelisted (on a different volume?) Dec 22 17:36:24 hostname [0x0-0xa42a42].com.filemaker.filemakerpro[43304]: launch of /Users/username/Applications/FileMaker Pro 5.5/FileMaker Pro.app/Contents/MacOS/FileMaker Pro was blocked Dec 22 17:36:24 hostname com.apple.launchd.peruser.1340[6375] ([0x0-0xa42a42].com.filemaker.filemakerpro[43304]): Exited with exit code: 255 Dec 22 17:36:24 hostname parentalcontrolsd[43221]: -[ActivityTracker(Private) _removeAppFromWhiteList:] [1362:username] -- *** Couldn't find local user record Running sudo mcxquery -format xml -user username -group groupname includes the following entry for FileMaker Pro 5.5 (and appears to include a full integration of the user's application whitelist & group's application whitelist): <dict> <key>bundleID</key> <string>com.filemaker.filemakerpro</string> <key>displayName</key> <string>FileMaker Pro</string> </dict> Note the lack of <key>appID</key><data> ... </data> which seems to specify a signed application. While whitelisted directories also appear to be correctly listed in the results, they too do not actually allow the applications to be run either. What is going on here?! Where else should I be looking?

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• class on td is causing tr not to respond

  - by Catfish

  I have this script and the rows that have td class "odd" will not toggle the blue color that the rows without the class "odd" do. anybody know why? //Used to make a row turn blue if available $('tr:not(theadtr)').toggle(function() { $(this).addClass("hltclick"); }, function() { $(this).removeClass("hltclick"); }); and this table <table> <thead> <tr class="border"> <td>Start Time</td> <td>End Time</td> </tr> </thead> <tbody> <tr class="border"> <td class="odd"><a href="#">7:00am</a></td> <td class="odd"><a href="#">8:00am</a></td> </tr> <tr class="border"> <td><a href="#">8:00am</a></td> <td><a href="#">9:00am</a></td> </tr> <tr class="border"> <td class="odd"><a href="#">9:00am</a></td> <td class="odd"><a href="#">10:00am</a></td> </tr> <tr class="border"> <td><a href="#">10:00am</a></td> <td><a href="#">11:00am</a></td> </tr> <tr class="border"> <td class="odd"><a href="#">11:00am</a></td> <td class="odd"><a href="#">12:00pm</a></td> </tr> <tr class="border"> <td><a href="#">1:00pm</a></td> <td><a href="#">2:00pm</a></td> </tr> <tr class="border"> <td class="odd"><a href="#">2:00pm</a></td> <td class="odd"><a href="#">3:00pm</a></td> </tr> <tr class="border"> <td><a href="#">3:00pm</a></td> <td><a href="#">4:00pm</a></td> </tr> <tr class="border"> <td class="odd"><a href="#">4:00pm</a></td> <td class="odd"><a href="#">5:00pm</a></td> </tr> </tbody> </table> and this css #calendar { -moz-border-radius-bottomleft:6px; -moz-border-radius-bottomright:6px; padding:15px; clear:both; padding:15px; } body { color:#222222; font-family:sans-serif; font-size:12px; } table { border:1px solid white; border-collapse:collapse; margin:0 0 30px; width:100%; } .border { border:1px solid #333134; } thead tr { background:none repeat scroll 0 0 #B7EBFF; color:#333134; font-size:24px; font-weight:bold; } tr { background:none repeat scroll 0 0 #616062; font-size:16px; } thead td { font-family:"Century Gothic",Arial; padding:5px 0 20px 5px; } tr.border thead tr { color:#333134; font-size:24px; font-weight:bold; } tr { font-size:16px; }

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• navbar hover issue in ie7

  - by Joel

  I'm having a problem with a child list not hovering correctly in IE7. Other browsers and IE7 seem to work fine. Here is the site: http://rattletree.com/index_1.php If you hover over the nav bars you'll see the sub-list come into view. You can see that the arrow image is not below the navbar in IE7 only. html: <div id="navbar2"> <ul id="navbar"> <li id="index"><a href="index.php">About Rattletree</a></li> <li id="upcomingshows"><a href="upcomingshows.php">Calendar</a></li> <li id="booking"><a href="booking.php">Contact</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png"</img><a href="#">Booking Information</a></li> <li class="innerlist"><a href="#">Press</a></li> </ul> </li> <li id="instruments"><a href="instruments.php">The Band</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png"</img><a href="#">The Instruments</a></li> <li class="innerlist"><a href="#">The Players</a></li> </ul> </li> <li id="classes"><a href="classes.php">Sights &amp; Sounds</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png"</img><a href="#">Listen</a></li> <li class="innerlist"><a href="#">Photos</a></li> <li class="innerlist"><a href="#">Video</a></li> </ul> </li> <li id"classes"><a href="classes.php">Workshops &amp; Classes</a></li> </ul> </div> and css: /* OUTER LIST STYLING */ div#navbar2 { position:relative; width: 100%; border-top: solid #000 1px; border-bottom: solid #546F8B 1px; background-color: #546F8B; } div#navbar2 ul#navbar { padding: 0px; margin: 10px 0; font-family: Arial, Helvetica, sans-serif; font-size: 16px; letter-spacing:1px; color: #FFF; white-space: nowrap; display:block; } div#navbar2 ul#navbar li { position:relative; margin: 0px; padding:0px; list-style-type: none; display:inline; } div#navbar2 li a { text-decoration: none; color: #fff; margin:0; padding: 11px 12px; } div#navbar2 li a:link { color: #FFF: } div#navbar2 li a:visited { color: #ffffff; } div#navbar2 li a:hover { color: #000; background-color: #FDFFC9; } /* INNER LIST STYLING */ div#navbar2 ul#navbar li ul.innerlist{ display: none; color:#000; } div#navbar2 ul#navbar li ul.innerlist li{ color:#000; } div#navbar2 ul#navbar li:hover ul.innerlist { position: absolute; display: inline; left: 0; width: 100%; margin: 30px 0 0px 0px; padding: 0; color:#000; } div#navbar2 ul#navbar li.innerlist a { text-decoration: none; font-weight:bold; color: #000; padding: 10px 15px 20px 15px; margin:0; } div#navbar2 li.innerlist a:link { color: #000: } div#navbar2 li.innerlist a:visited { color: #000; } div#navbar2 ul#navbar li.innerlist a:hover { color: #e62d31; background-color:transparent; } img.arrowAdjust{ padding:0px 0 0 20px; margin:0; }

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• PostgreSQL - fetch the row which has the Max value for a column

  - by Joshua Berry

  I'm dealing with a Postgres table (called "lives") that contains records with columns for time_stamp, usr_id, transaction_id, and lives_remaining. I need a query that will give me the most recent lives_remaining total for each usr_id There are multiple users (distinct usr_id's) time_stamp is not a unique identifier: sometimes user events (one by row in the table) will occur with the same time_stamp. trans_id is unique only for very small time ranges: over time it repeats remaining_lives (for a given user) can both increase and decrease over time example: time_stamp|lives_remaining|usr_id|trans_id ----------------------------------------- 07:00 | 1 | 1 | 1 09:00 | 4 | 2 | 2 10:00 | 2 | 3 | 3 10:00 | 1 | 2 | 4 11:00 | 4 | 1 | 5 11:00 | 3 | 1 | 6 13:00 | 3 | 3 | 1 As I will need to access other columns of the row with the latest data for each given usr_id, I need a query that gives a result like this: time_stamp|lives_remaining|usr_id|trans_id ----------------------------------------- 11:00 | 3 | 1 | 6 10:00 | 1 | 2 | 4 13:00 | 3 | 3 | 1 As mentioned, each usr_id can gain or lose lives, and sometimes these timestamped events occur so close together that they have the same timestamp! Therefore this query won't work: SELECT b.time_stamp,b.lives_remaining,b.usr_id,b.trans_id FROM (SELECT usr_id, max(time_stamp) AS max_timestamp FROM lives GROUP BY usr_id ORDER BY usr_id) a JOIN lives b ON a.max_timestamp = b.time_stamp Instead, I need to use both time_stamp (first) and trans_id (second) to identify the correct row. I also then need to pass that information from the subquery to the main query that will provide the data for the other columns of the appropriate rows. This is the hacked up query that I've gotten to work: SELECT b.time_stamp,b.lives_remaining,b.usr_id,b.trans_id FROM (SELECT usr_id, max(time_stamp || '*' || trans_id) AS max_timestamp_transid FROM lives GROUP BY usr_id ORDER BY usr_id) a JOIN lives b ON a.max_timestamp_transid = b.time_stamp || '*' || b.trans_id ORDER BY b.usr_id Okay, so this works, but I don't like it. It requires a query within a query, a self join, and it seems to me that it could be much simpler by grabbing the row that MAX found to have the largest timestamp and trans_id. The table "lives" has tens of millions of rows to parse, so I'd like this query to be as fast and efficient as possible. I'm new to RDBM and Postgres in particular, so I know that I need to make effective use of the proper indexes. I'm a bit lost on how to optimize. I found a similar discussion here. Can I perform some type of Postgres equivalent to an Oracle analytic function? Any advice on accessing related column information used by an aggregate function (like MAX), creating indexes, and creating better queries would be much appreciated! P.S. You can use the following to create my example case: create TABLE lives (time_stamp timestamp, lives_remaining integer, usr_id integer, trans_id integer); insert into lives values ('2000-01-01 07:00', 1, 1, 1); insert into lives values ('2000-01-01 09:00', 4, 2, 2); insert into lives values ('2000-01-01 10:00', 2, 3, 3); insert into lives values ('2000-01-01 10:00', 1, 2, 4); insert into lives values ('2000-01-01 11:00', 4, 1, 5); insert into lives values ('2000-01-01 11:00', 3, 1, 6); insert into lives values ('2000-01-01 13:00', 3, 3, 1);

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• navbar hover issue in ie8

  - by Joel

  I'm having a problem with a child list not hovering correctly in IE8. Other browsers and IE7 seem to work fine. Here is the site: http://rattletree.com/index_1.php If you hover over the nav bars you'll see the sub-list come into view. You can see that the arrow image is not below the navbar in IE8 only. html: <div id="navbar2"> <ul id="navbar"> <li id="index"><a href="index.php">About Rattletree</a></li> <li id="upcomingshows"><a href="upcomingshows.php">Calendar</a></li> <li id="booking"><a href="booking.php">Contact</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png"</img><a href="#">Booking Information</a></li> <li class="innerlist"><a href="#">Press</a></li> </ul> </li> <li id="instruments"><a href="instruments.php">The Band</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png"</img><a href="#">The Instruments</a></li> <li class="innerlist"><a href="#">The Players</a></li> </ul> </li> <li id="classes"><a href="classes.php">Sights &amp; Sounds</a> <ul class="innerlist"> <li class="innerlist"><img class="arrowAdjust" src="images/curved_arrow.png"</img><a href="#">Listen</a></li> <li class="innerlist"><a href="#">Photos</a></li> <li class="innerlist"><a href="#">Video</a></li> </ul> </li> <li id"classes"><a href="classes.php">Workshops &amp; Classes</a></li> </ul> </div> and css: /* OUTER LIST STYLING */ div#navbar2 { position:relative; width: 100%; border-top: solid #000 1px; border-bottom: solid #546F8B 1px; background-color: #546F8B; } div#navbar2 ul#navbar { padding: 0px; margin: 10px 0; font-family: Arial, Helvetica, sans-serif; font-size: 16px; letter-spacing:1px; color: #FFF; white-space: nowrap; display:block; } div#navbar2 ul#navbar li { position:relative; margin: 0px; padding:0px; list-style-type: none; display:inline; } div#navbar2 li a { text-decoration: none; color: #fff; margin:0; padding: 11px 12px; } div#navbar2 li a:link { color: #FFF: } div#navbar2 li a:visited { color: #ffffff; } div#navbar2 li a:hover { color: #000; background-color: #FDFFC9; } /* INNER LIST STYLING */ div#navbar2 ul#navbar li ul.innerlist{ display: none; color:#000; } div#navbar2 ul#navbar li ul.innerlist li{ color:#000; } div#navbar2 ul#navbar li:hover ul.innerlist { position: absolute; display: inline; left: 0; width: 100%; margin: 30px 0 0px 0px; padding: 0; color:#000; } div#navbar2 ul#navbar li.innerlist a { text-decoration: none; font-weight:bold; color: #000; padding: 10px 15px 20px 15px; margin:0; } div#navbar2 li.innerlist a:link { color: #000: } div#navbar2 li.innerlist a:visited { color: #000; } div#navbar2 ul#navbar li.innerlist a:hover { color: #e62d31; background-color:transparent; } img.arrowAdjust{ padding:0px 0 0 20px; margin:0; }

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• JPA Entity Manager resource handling

  - by chiragshahkapadia

  Every time I call JPA method its creating entity and binding query. My persistence properties are: <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/> <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.SingletonEhCacheProvider"/> <property name="hibernate.cache.use_second_level_cache" value="true"/> <property name="hibernate.cache.use_query_cache" value="true"/> And I am creating entity manager the way shown below: emf = Persistence.createEntityManagerFactory("pu"); em = emf.createEntityManager(); em = Persistence.createEntityManagerFactory("pu").createEntityManager(); Is there any nice way to manage entity manager resource instead create new every time or any property can set in persistence. Remember it's JPA. See below binding log every time : 15:35:15,527 INFO [AnnotationBinder] Binding entity from annotated class: * 15:35:15,527 INFO [QueryBinder] Binding Named query: * = * 15:35:15,527 INFO [QueryBinder] Binding Named query: * = * 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [QueryBinder] Binding Named query: 15:35:15,527 INFO [EntityBinder] Bind entity com.* on table * 15:35:15,542 INFO [HibernateSearchEventListenerRegister] Unable to find org.hibernate.search.event.FullTextIndexEventListener on the classpath. Hibernate Search is not enabled. 15:35:15,542 INFO [NamingHelper] JNDI InitialContext properties:{} 15:35:15,542 INFO [DatasourceConnectionProvider] Using datasource: 15:35:15,542 INFO [SettingsFactory] RDBMS: and Real Application Testing options 15:35:15,542 INFO [SettingsFactory] JDBC driver: Oracle JDBC driver, version: 9.2.0.1.0 15:35:15,542 INFO [Dialect] Using dialect: org.hibernate.dialect.Oracle10gDialect 15:35:15,542 INFO [TransactionFactoryFactory] Transaction strategy: org.hibernate.transaction.JDBCTransactionFactory 15:35:15,542 INFO [TransactionManagerLookupFactory] No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recomm ended) 15:35:15,542 INFO [SettingsFactory] Automatic flush during beforeCompletion(): disabled 15:35:15,542 INFO [SettingsFactory] Automatic session close at end of transaction: disabled 15:35:15,542 INFO [SettingsFactory] JDBC batch size: 15 15:35:15,542 INFO [SettingsFactory] JDBC batch updates for versioned data: disabled 15:35:15,542 INFO [SettingsFactory] Scrollable result sets: enabled 15:35:15,542 INFO [SettingsFactory] JDBC3 getGeneratedKeys(): disabled 15:35:15,542 INFO [SettingsFactory] Connection release mode: auto 15:35:15,542 INFO [SettingsFactory] Default batch fetch size: 1 15:35:15,542 INFO [SettingsFactory] Generate SQL with comments: disabled 15:35:15,542 INFO [SettingsFactory] Order SQL updates by primary key: disabled 15:35:15,542 INFO [SettingsFactory] Order SQL inserts for batching: disabled 15:35:15,542 INFO [SettingsFactory] Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory 15:35:15,542 INFO [ASTQueryTranslatorFactory] Using ASTQueryTranslatorFactory 15:35:15,542 INFO [SettingsFactory] Query language substitutions: {} 15:35:15,542 INFO [SettingsFactory] JPA-QL strict compliance: enabled 15:35:15,542 INFO [SettingsFactory] Second-level cache: enabled 15:35:15,542 INFO [SettingsFactory] Query cache: enabled 15:35:15,542 INFO [SettingsFactory] Cache region factory : org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge 15:35:15,542 INFO [RegionFactoryCacheProviderBridge] Cache provider: net.sf.ehcache.hibernate.SingletonEhCacheProvider 15:35:15,542 INFO [SettingsFactory] Optimize cache for minimal puts: disabled 15:35:15,542 INFO [SettingsFactory] Structured second-level cache entries: disabled 15:35:15,542 INFO [SettingsFactory] Query cache factory: org.hibernate.cache.StandardQueryCacheFactory 15:35:15,542 INFO [SettingsFactory] Statistics: disabled 15:35:15,542 INFO [SettingsFactory] Deleted entity synthetic identifier rollback: disabled 15:35:15,542 INFO [SettingsFactory] Default entity-mode: pojo 15:35:15,542 INFO [SettingsFactory] Named query checking : enabled 15:35:15,542 INFO [SessionFactoryImpl] building session factory 15:35:15,542 INFO [SessionFactoryObjectFactory] Not binding factory to JNDI, no JNDI name configured 15:35:15,542 INFO [UpdateTimestampsCache] starting update timestamps cache at region: org.hibernate.cache.UpdateTimestampsCache 15:35:15,542 INFO [StandardQueryCache] starting query cache at region: org.hibernate.cache.StandardQueryCache

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• Dynamic data-entry value store

  - by simendsjo

  I'm creating a data-entry application where users are allowed to create the entry schema. My first version of this just created a single table per entry schema with each entry spanning a single or multiple columns (for complex types) with the appropriate data type. This allowed for "fast" querying (on small datasets as I didn't index all columns) and simple synchronization where the data-entry was distributed on several databases. I'm not quite happy with this solution though; the only positive thing is the simplicity... I can only store a fixed number of columns. I need to create indexes on all columns. I need to recreate the table on schema changes. Some of my key design criterias are: Very fast querying (Using a simple domain specific query language) Writes doesn't have to be fast Many concurrent users Schemas will change often Schemas might contain many thousand columns The data-entries might be distributed and needs syncronization. Preferable MySQL and SQLite - Databases like DB2 and Oracle is out of the question. Using .Net/Mono I've been thinking of a couple of possible designs, but none of them seems like a good choice. Solution 1: Union like table containing a Type column and one nullable column per type. This avoids joins, but will definitly use a lot of space. Solution 2: Key/value store. All values are stored as string and converted when needed. Also use a lot of space, and of course, I hate having to convert everything to string. Solution 3: Use an xml database or store values as xml. Without any experience I would think this is quite slow (at least for the relational model unless there is some very good xpath support). I also would like to avoid an xml database as other parts of the application fits better as a relational model, and being able to join the data is helpful. I cannot help to think that someone has solved (some of) this already, but I'm unable to find anything. Not quite sure what to search for either... I know market research is doing something like this for their questionnaires, but there are few open source implementations, and the ones I've found doesn't quite fit the bill. PSPP has much of the logic I'm thinking of; primitive column types, many columns, many rows, fast querying and merging. Too bad it doesn't work against a database.. And of course... I don't need 99% of the provided functionality, but a lot of stuff not included. I'm not sure this is the right place to ask such a design related question, but I hope someone here has some tips, know of any existing work, or can point me to a better place to ask such a question. Thanks in advance!

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• dbms_xmlschema fail to validate with complexType

  - by Andrew

  Preface: This works on one Oracle 11gR1 (Solaris 64) database and not on a second and we can't figure out the difference between the two databases. Somehow the complexType causes the validation to fail with this error: ORA-31154: invalid XML document ORA-19202: Error occurred in XML processing LSX-00200: element "shiporder" not empty ORA-06512: at "SYS.XMLTYPE", line 354 ORA-06512: at line 13 But the schema is valid (passes this online test: http://www.xmlme.com/Validator.aspx) -- Cleanup any existing schema begin dbms_xmlschema.deleteschema('shiporder.xsd',dbms_xmlschema.DELETE_CASCADE); end; -- Define the problem schema (adapted from http://www.w3schools.com/schema/schema_example.asp) begin dbms_xmlschema.registerSchema('shiporder.xsd','<?xml version="1.0" encoding="ISO-8859-1" ?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="shiporder"> <xs:complexType> <xs:sequence> <xs:element name="orderperson" type="xs:string"/> </xs:sequence> </xs:complexType> </xs:element> </xs:schema>',owner=>'SCOTT'); end; -- Attempt to validate declare bbb xmltype; begin bbb := XMLType('<?xml version="1.0" encoding="ISO-8859-1"?> <shiporder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="shiporder.xsd"> <orderperson>John Smith</orderperson> </shiporder>'); XMLType.schemaValidate(bbb); end; Now if I gut the schema definition and leave only a string in the XML then the validation passes: begin dbms_xmlschema.deleteschema('shiporder.xsd',dbms_xmlschema.DELETE_CASCADE); end; begin dbms_xmlschema.registerSchema('shiporder.xsd','<?xml version="1.0" encoding="ISO-8859-1" ?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="shiporder" type="xs:string"/> </xs:schema>',owner=>'SCOTT'); end; DECLARE xml XMLTYPE; BEGIN xml := XMLTYPE('<?xml version="1.0" encoding="ISO-8859-1"?> <shiporder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="shiporder.xsd"> John Smith </shiporder>'); XMLTYPE.schemaValidate(xml); END;

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• Internet Explorer buggy when accessing a custom weblogic provider

  - by James

  I've created a custom Weblogic Security Authentication Provider on version 10.3 that includes a custom login module to validate users. As part of the provider, I've implemented the ServletAuthenticationFilter and added one filter. The filter acts as a common log on page for all the applications within the domain. When we access any secured URLs by entering them in the address bar, this works fine in IE and Firefox. But when we bookmark the link in IE an odd thing happens. If I click the bookmark, you will see our log on page, then after you've successfully logged into the system the basic auth page will display, even though the user is already authenticated. This never happens in Firefox, only IE. It's also intermittent. 1 time out of 5 IE will correctly redirect and not show the basic auth window. Firefox and Opera will correctly redirect everytime. We've captured the response headers and compared the success and failures, they are identical. final boolean isAuthenticated = authenticateUser(userName, password, req); // Send user on to the original URL if (isAuthenticated) { res.sendRedirect(targetURL); return; } As you can see, once the user is authenticated I do a redirect to the original URL. Is there a step I'm missing? The authenticateUser() method is taken verbatim from an example in Oracle's documents. private boolean authenticateUser(final String userName, final String password, HttpServletRequest request) { boolean results; try { ServletAuthentication.login(new CallbackHandler() { @Override public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException { for (Callback callback : callbacks) { if (callback instanceof NameCallback) { NameCallback nameCallback = (NameCallback) callback; nameCallback.setName(userName); } if (callback instanceof PasswordCallback) { PasswordCallback passwordCallback = (PasswordCallback) callback; passwordCallback.setPassword(password.toCharArray()); } } } }, request); results = true; } catch (LoginException e) { results = false; } return results; I am asking the question here because I don't know if the issue is with the Weblogic config or the code. If this question is more suited to ServerFault please let me know and I will post there. It is odd that it works everytime in Firefox and Opera but not in Internet Explorer. I wish that not using Internet Explorer was an option but it is currently the company standard. Any help or direction would be appreciated. I have tested against IE 6 & 8 and deployed the custom provider on 3 different environments and I can still reproduce the bug.

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• Cannot figure out how to take in generic parameters for an Enterprise Framework library sql statemen

  - by KallDrexx

  I have written a specialized class to wrap up the enterprise library database functionality for easier usage. The reasoning for using the Enterprise Library is because my applications commonly connect to both oracle and sql server database systems. My wrapper handles both creating connection strings on the fly, connecting, and executing queries allowing my main code to only have to write a few lines of code to do database stuff and deal with error handling. As an example my ExecuteNonQuery method has the following declaration: /// <summary> /// Executes a query that returns no results (e.g. insert or update statements) /// </summary> /// <param name="sqlQuery"></param> /// <param name="parameters">Hashtable containing all the parameters for the query</param> /// <returns>The total number of records modified, -1 if an error occurred </returns> public int ExecuteNonQuery(string sqlQuery, Hashtable parameters) { // Make sure we are connected to the database if (!IsConnected) { ErrorHandler("Attempted to run a query without being connected to a database.", ErrorSeverity.Critical); return -1; } // Form the command DbCommand dbCommand = _database.GetSqlStringCommand(sqlQuery); // Add all the paramters foreach (string key in parameters.Keys) { if (parameters[key] == null) _database.AddInParameter(dbCommand, key, DbType.Object, null); else _database.AddInParameter(dbCommand, key, DbType.Object, parameters[key].ToString()); } return _database.ExecuteNonQuery(dbCommand); } _database is defined as private Database _database;. Hashtable parameters are created via code similar to p.Add("@param", value);. the issue I am having is that it seems that with enterprise library database framework you must declare the dbType of each parameter. This isn't an issue when you are calling the database code directly when forming the paramters but doesn't work for creating a generic abstraction class such as I have. In order to try and get around that I thought I could just use DbType.Object and figure the DB will figure it out based on the columns the sql is working with. Unfortunately, this is not the case as I get the following error: Implicit conversion from data type sql_variant to varchar is not allowed. Use the CONVERT function to run this query Is there any way to use generic parameters in a wrapper class or am I just going to have to move all my DB code into my main classes?

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• What are the Options for Storing Hierarchical Data in a Relational Database?

  - by orangepips

  Good Overviews One more Nested Intervals vs. Adjacency List comparison: the best comparison of Adjacency List, Materialized Path, Nested Set and Nested Interval I've found. Models for hierarchical data: slides with good explanations of tradeoffs and example usage Representing hierarchies in MySQL: very good overview of Nested Set in particular Hierarchical data in RDBMSs: most comprehensive and well organized set of links I've seen, but not much in the way on explanation Options Ones I am aware of and general features: Adjacency List: Columns: ID, ParentID Easy to implement. Cheap node moves, inserts, and deletes. Expensive to find level (can store as a computed column), ancestry & descendants (Bridge Hierarchy combined with level column can solve), path (Lineage Column can solve). Use Common Table Expressions in those databases that support them to traverse. Nested Set (a.k.a Modified Preorder Tree Traversal) First described by Joe Celko - covered in depth in his book Trees and Hierarchies in SQL for Smarties Columns: Left, Right Cheap level, ancestry, descendants Compared to Adjacency List, moves, inserts, deletes more expensive. Requires a specific sort order (e.g. created). So sorting all descendants in a different order requires additional work. Nested Intervals Combination of Nested Sets and Materialized Path where left/right columns are floating point decimals instead of integers and encode the path information. Bridge Table (a.k.a. Closure Table: some good ideas about how to use triggers for maintaining this approach) Columns: ancestor, descendant Stands apart from table it describes. Can include some nodes in more than one hierarchy. Cheap ancestry and descendants (albeit not in what order) For complete knowledge of a hierarchy needs to be combined with another option. Flat Table A modification of the Adjacency List that adds a Level and Rank (e.g. ordering) column to each record. Expensive move and delete Cheap ancestry and descendants Good Use: threaded discussion - forums / blog comments Lineage Column (a.k.a. Materialized Path, Path Enumeration) Column: lineage (e.g. /parent/child/grandchild/etc...) Limit to how deep the hierarchy can be. Descendants cheap (e.g. LEFT(lineage, #) = '/enumerated/path') Ancestry tricky (database specific queries) Database Specific Notes MySQL Use session variables for Adjacency List Oracle Use CONNECT BY to traverse Adjacency Lists PostgreSQL ltree datatype for Materialized Path SQL Server General summary 2008 offers HierarchyId data type appears to help with Lineage Column approach and expand the depth that can be represented.

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• How I can get output from 1st frame textfield input text to 2nd frame textArea

  - by soulgreen

  Here is my 1st frame - I want went I input text in textfield example name then click button report will display output to 2nd frame using textArea... please help me import java.awt.; import java.awt.event.; import javax.swing.; import javax.swing.border.; public class Order extends JFrame implements ActionListener { private JPanel pInfo,pN, pIC, pDate,Blank,pBlank, button, pTotal; private JLabel nameL,icL,DateL; private JTextField nameTF, icTF; private JFormattedTextField DateTF; private JButton calB,clearB,exitB,reportB; public Order() { Container contentPane = getContentPane(); contentPane.setLayout(new BorderLayout()); contentPane.setBackground(Color.gray); pInfo = new JPanel(); pN = new JPanel(); pIC = new JPanel(); pDate = new JPanel(); nameTF = new JTextField(30); icTF = new JTextField(30); DateTF = new JFormattedTextField(java.util.Calendar.getInstance().getTime()); DateTF.setEditable (false); DateTF.addActionListener(this); nameL = new JLabel(" NAME : ",SwingConstants.RIGHT); icL = new JLabel(" IC : ",SwingConstants.RIGHT); DateL = new JLabel(" DATE :",SwingConstants.RIGHT); pInfo.setLayout(new GridLayout(10,2,5,5)); pInfo.setBorder(BorderFactory.createTitledBorder (BorderFactory.createEtchedBorder(),"ORDER")); pN.add(nameL); pN.add(nameTF); pIC.add(icL); pIC.add(icTF); pDate.add(DateL); pDate.add(DateTF); pInfo.add(pN); pInfo.add(pIC); pInfo.add(pDate); pInfo.setBackground(Color.GRAY); pN.setBackground(Color.gray); pIC.setBackground(Color.gray); pDate.setBackground(Color.gray); nameL.setForeground(Color.black); icL.setForeground(Color.black); DateL.setForeground(Color.black); nameTF.setBackground(Color.pink); icTF.setBackground(Color.pink); DateTF.setBackground(Color.pink); contentPane.add(pInfo,BorderLayout.CENTER); Blank = new JPanel(); pBlank = new JPanel(); button = new JPanel(); calB = new JButton("CALCULATE"); calB.setToolTipText("Click to calculate"); clearB = new JButton("RESET"); clearB.setToolTipText("Click to clear"); reportB = new JButton ("REPORT"); reportB.setToolTipText ("Click to print"); exitB = new JButton("EXIT"); exitB.setToolTipText("Click to exit"); Blank.setLayout(new GridLayout(2,2)); Blank.setBorder(BorderFactory.createTitledBorder (BorderFactory.createEtchedBorder(),"")); button.setLayout(new GridLayout(1,4)); button.add(calB,BorderLayout.WEST); button.add(clearB,BorderLayout.CENTER); button.add(reportB,BorderLayout.CENTER); button.add(exitB,BorderLayout.EAST); Blank.add(pBlank); Blank.add(button); contentPane.add(Blank,BorderLayout.SOUTH); Blank.setBackground(Color.gray); pBlank.setBackground(Color.gray); calB.setForeground(Color.black); clearB.setForeground(Color.black); reportB.setForeground(Color.black); exitB.setForeground(Color.black); calB.setBackground(Color.pink); clearB.setBackground(Color.pink); reportB.setBackground(Color.pink); exitB.setBackground(Color.pink); calB.addActionListener(this); clearB.addActionListener(this); reportB.addActionListener(this); exitB.addActionListener(this); } public void actionPerformed(ActionEvent p) { if (p.getSource() == calB) { } else if (p.getSource() == clearB) { } else if (p.getSource () == reportB) { } else if (p.getSource() == exitB) { } } public static void main (String [] args) { Order frame = new Order(); frame.setTitle("Order"); frame.setSize(500,500); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.setVisible(true); frame.setLocationRelativeTo(null);//center the frame } }

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• No unique bean of type [javax.persistence.EntityManager] is defined

  - by sebajb

  I am using JUnit 4 to test Dao Access with Spring (annotations) and JPA (hibernate). The datasource is configured through JNDI(Weblogic) with an ORacle(Backend). This persistence is configured with just the name and a RESOURCE_LOCAL transaction-type The application context file contains notations for annotations, JPA config, transactions, and default package and configuration for annotation detection. I am using Junit4 like so: ApplicationContext <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="persistenceUnitName" value="workRequest"/> <property name="dataSource" ref="dataSource" /> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="databasePlatform" value="${database.target}"/> <property name="showSql" value="${database.showSql}" /> <property name="generateDdl" value="${database.generateDdl}" /> </bean> </property> </bean> <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName"> <value>workRequest</value> </property> <property name="jndiEnvironment"> <props> <prop key="java.naming.factory.initial">weblogic.jndi.WLInitialContextFactory</prop> <prop key="java.naming.provider.url">t3://localhost:7001</prop> </props> </property> </bean> <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/> <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> JUnit TestCase @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "classpath:applicationContext.xml" }) public class AssignmentDaoTest { private AssignmentDao assignmentDao; @Test public void readAll() { assertNotNull("assignmentDao cannot be null", assignmentDao); List assignments = assignmentDao.findAll(); assertNotNull("There are no assignments yet", assignments); } } regardless of what changes I make I get: No unique bean of type [javax.persistence.EntityManager] is defined Any hint on what this could be. I am running the tests inside eclipse.

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• Is it correct or incorrect for a Java JAR to contain its own dependencies?

  - by 4herpsand7derpsago

  I guess this is a two-part question. I am trying to write my own Ant task (MyFirstTask) that can be used in other project's build.xml buildfiles. To do this, I need to compile and package my Ant task inside its own JAR. Because this Ant task that I have written is fairly complicated, it has about 20 dependencies (other JAR files), such as using XStream for OX-mapping, Guice for DI, etc. I am currently writing the package task in the build.xml file inside the MyFirstTask project (the buildfile that will package myfirsttask.jar, which is the reusable Ant task). I am suddenly realizing that I don't fully understand the intention of a Java JAR. Is it that a JAR should not contain dependencies, and leave it to the runtime configuration (the app container, the runtime environment, etc.) to supply it with the dependencies it needs? I would assume if this is the case, an executable JAR is an exception to the rule, yes? Or, is it the intention for Java JARs to also include their dependencies? Either way, I don't want to be forcing my users to be copying-n-pasting 25+ JARs into their Ant libs; that's just cruel. I like the way WAR files are set up, where the classpath for dependencies is defined under the classes/ directory. I guess, ultimately, I'd like my JAR structure to look like: myfirsttask.jar/ com/ --> the root package of my compiled binaries config/ --> config files, XML, XSD, etc. classes/ --> all dependencies, guice-3.0.jar, xstream-1.4.3.jar, etc. META-INF/ MANIFEST.MF I assume that in order to accomplish this (and get the runtime classpath to also look into the classes/ directory), I'll need to modify the MANIFEST.MF somehow (I know there's a manifest attribute called ClassPath, I believe?). I'm just having a tough time putting everything together, and have a looming/lingering question about the very intent of JARs to begin with. Can someone please confirm whether Oracle intends for JARs to contain their dependencies or not? And, either way, what I would have to do in the manifest (or anywhere else) to make sure that, at runtime, the classpath can find the dependencies stored under the classes/ directory? Thanks in advance!

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• NHibernate unable to create SessionFactory

  - by Tyler

  I'm having a bit of trouble setting up NHibernate, and I'm not too sure what the problem is exactly. I'm attempting to save a domain object to the database (Oracle 10g XE). However, I'm getting a TypeInitializationException while trying to create the ISessionFactory. Here is what my hibernate.cfg.xml looks like: <?xml version="1.0" encoding="utf-8"?> <hibernate-configuration xmlns="urn:nhibernate-configuration-2.2" > <session-factory name="MyProject.DataAccess"> <property name="connection.driver_class">NHibernate.Driver.OracleClientDriver</property> <property name="connection.connection_string"> User ID=myid;Password=mypassword;Data Source=localhost </property> <property name="show_sql">true</property> <property name="dialect">NHibernate.Dialect.OracleDialect</property> <property name="proxyfactory.factory_class">NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu</property> <mapping resource="MyProject/Domain/User.hbm.xml"/> </session-factory> </hibernate-configuration> I created a DAO which I will use to persist domain objects to the database. The DAO uses a HibernateUtil class that creates the SessionFactory. Both classes are in the DataAccess namespace along with the Hibernate configuration. This is where the exception is occuring. Here's that class: public class HibernateUtil { private static ISessionFactory SessionFactory = BuildSessionFactory(); private static ISessionFactory BuildSessionFactory() { try { // This seems to be where the problem occurs return new Configuration().Configure().BuildSessionFactory(); } catch (TypeInitializationException ex) { Console.WriteLine("Initial SessionFactory creation failed." + ex); throw new Exception("Unable to create SessionFactory."); } } public static ISessionFactory GetSessionFactory() { return SessionFactory; } } The DataAccess namespace references the NHibernate DLLs. This is virtually the same setup I've used with Hibernate in Java, so I'm not entirely sure what I'm doing wrong here. Any ideas? Edit The innermost exception is the following: "Could not find file 'C:\Users\Tyler\Documents\Visual Studio 2010\Projects\MyProject\MyProject\ConsoleApplication\bin\Debug\hibernate.cfg.xml'." ConsoleApplication contains the entry point where I've created a User object and am trying to persist it with my DAO. Why is it looking for the configuration file there? The actual persisting takes place in the DAO, which is in DataAccess. Also, when I add the configuration file to ConsoleApplication, it still does not find it.

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• A two player game over the intranet..

  - by Santwana

  Hi everybody.. I am a student of 3rd year engineering and only a novice in my programming skills. I need some help with my project.. I wish to develop a two player game to be played over the network (Intranet). I want to develop a simple website with a few html pages for this.My ideas for the project run as follows: 1.People can log in from different systems and check who ever is online on the network currently. the page also shows who is playing with whom. 2.If a person is interested in playing with a player who is currently online, he sends a request of which the other player is somehow notified( using a message or an alert on his profile page..) 3.If the player accepts the request, a game is started. This is exactly where I am clueless.. How can I make them play the game? I need to develop a turn based game with two players, eg chessboard.. how can I do this? The game has to be played live.. and it is time tracked. i need your help with coding the above.. the other features i wish to include are: 4.The game could not be abruptly terminated by any one if the users.The request to terminate the game should be sent to the other player first and only if he accepts can the game be terminated. Whoever wins the game would get a plus 10 on their credit and if he terminated he gets a minus 10. The credits remains constant even if he loses but the success percentage is reduced. 6.The player with highest winning percentage is projected as the player of the week on the home page and he can post a challenge to all others.. I only have an intermediate knowledge of core java and know the basics of Swing and Awt. I am not at all familiar with networking in java right now. I have 5 to 6 weeks of time for developing the project but I hope to learn the things before I start my project. i would prefer to use a lan to illustrate the project and I know only java,jsp,oracle,html and bit of xml to develop my proj. Also I wish to know if I can code this within 6 weeks, would it be too difficult or complicated? Please spare some time to tell me. Please.. please.. I need your suggestions and help.. thank you so much..

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• Techniques for querying a set of object in-memory in a Java application

  - by Edd Grant

  Hi All, We have a system which performs a 'coarse search' by invoking an interface on another system which returns a set of Java objects. Once we have received the search results I need to be able to further filter the resulting Java objects based on certain criteria describing the state of the attributes (e.g. from the initial objects return all objects where x.y z && a.b == c). The criteria used to filter the set of objects each time is partially user configurable, by this I mean that users will be able to select the values and ranges to match on but the attributes they can pick from will be a fixed set. The data sets are likely to contain <= 10,000 objects for each search. The search will be executed manually by the application user base probably no more than 2000 times a day (approx). It's probably worth mentioning that all the objects in the result set are known domain object classes which have Hibernate and JPA annotations describing their structure and relationship. Off the top of my head I can think of 3 ways of doing this: For each search persist the initial result set objects in our database, then use Hibernate to re-query them using the finer grained criteria. Use an in-memory Database (such as hsqldb?) to query and refine the initial result set. Write some custom code which iterates the initial result set and pulls out the desired records. Option 1 seems to involve a lot of toing and froing across a network to a physical Database (Oracle 10g) which might result in a lot of network and disk activity. It would also require the results from each search to be isolated from other result sets to ensure that different searches don't interfere with each other. Option 2 seems like a good idea in principle as it would allow me to do the finer query in memory and would not require the persistence of result data which would only be discarded after the search was complete. Gut feeling is that this could be pretty performant too but might result in larger memory overheads (which is fine as we can be pretty flexible on the amount of memory our JVM gets). Option 3 could be very performant but is something I would like to avoid as any code we write would require such careful testing that the time taken to acheive something flexible and robust enough would probably be prohibitive. I don't have time to prototype all 3 ideas so I am looking for comments people may have on the 3 options above, plus any further ideas I have not considered, to help me decide which idea might be most suitable. I'm currently leaning toward option 2 (in memory database) so would be keen to hear from people with experience of querying POJOs in memory too. Hopefully I have described the situation in enough detail but don't hesitate to ask if any further information is required to better understand the scenario. Cheers, Edd

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