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  • Make process run on non EDT (event dispatch thread) thread from EDT

    - by Aly
    I have a method running on the EDT and within that I want to make it execute something on a new (non EDT) thread. My current code is follows: @Override public void actionPerformed(ActionEvent arg0) { //gathering parameters from GUI //below code I want to run in new Thread and then kill this thread/(close the JFrame) new GameInitializer(userName, player, Constants.BLIND_STRUCTURE_FILES.get(blindStructure), handState); }

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  • String split array

    - by mac
    Intention is to take a current line which contains commas, store trimmed values of all space and store the line into the array. Why does this not work? String[] currentLineArray = currentInputLine.replace("\\s", "").split(",");

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  • Jetty offline documentation

    - by Victor Sorokin
    Is there any more-or-less comprehensive documentation for Jetty (e.g., similar to Tomcat or, really, in any form)? Theirs online wikis seems to be quite informative, but servers seem to be slow. Maybe, there some way to build docs from Jetty source distribution? I tried mvn site to no avail.

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  • I am faceing problem with this error

    - by Sanjeev
    I am using Struts application while running welcome page is run successfully after that the following error is appear org.apache.jasper.JasperException: Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV any idea whats the problem.

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  • What could be the reason for continuous Full GC's during application startup.

    - by Kumar225
    What could be the reason for continuous Full GC's during application (webapplication deployed on tomcat) startup? JDK 1.6 Memory settings -Xms1024M -Xmx1024M -XX:PermSize=200M -XX:MaxPermSize=512M -XX:+UseParallelOldGC jmap output is below Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 1073741824 (1024.0MB) NewSize = 2686976 (2.5625MB) MaxNewSize = 17592186044415 MB OldSize = 5439488 (5.1875MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 209715200 (200.0MB) MaxPermSize = 536870912 (512.0MB) 0.194: [GC [PSYoungGen: 10489K->720K(305856K)] 10489K->720K(1004928K), 0.0061190 secs] [Times: user=0.01 sys=0.00, real=0.00 secs] 0.200: [Full GC (System) [PSYoungGen: 720K->0K(305856K)] [ParOldGen: 0K->594K(699072K)] 720K->594K(1004928K) [PSPermGen: 6645K->6641K(204800K)], 0.0516540 secs] [Times: user=0.10 sys=0.00, real=0.06 secs] 6.184: [GC [PSYoungGen: 262208K->14797K(305856K)] 262802K->15392K(1004928K), 0.0354510 secs] [Times: user=0.18 sys=0.04, real=0.03 secs] 9.549: [GC [PSYoungGen: 277005K->43625K(305856K)] 277600K->60736K(1004928K), 0.0781960 secs] [Times: user=0.56 sys=0.07, real=0.08 secs] 11.768: [GC [PSYoungGen: 305833K->43645K(305856K)] 322944K->67436K(1004928K), 0.0584750 secs] [Times: user=0.40 sys=0.05, real=0.06 secs] 15.037: [GC [PSYoungGen: 305853K->43619K(305856K)] 329644K->72932K(1004928K), 0.0688340 secs] [Times: user=0.42 sys=0.01, real=0.07 secs] 19.372: [GC [PSYoungGen: 273171K->43621K(305856K)] 302483K->76957K(1004928K), 0.0573890 secs] [Times: user=0.41 sys=0.01, real=0.06 secs] 19.430: [Full GC (System) [PSYoungGen: 43621K->0K(305856K)] [ParOldGen: 33336K->54668K(699072K)] 76957K->54668K(1004928K) [PSPermGen: 36356K->36296K(204800K)], 0.4569500 secs] [Times: user=1.77 sys=0.02, real=0.46 secs] 19.924: [GC [PSYoungGen: 4280K->128K(305856K)] 58949K->54796K(1004928K), 0.0041070 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 19.928: [Full GC (System) [PSYoungGen: 128K->0K(305856K)] [ParOldGen: 54668K->54532K(699072K)] 54796K->54532K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.3531480 secs] [Times: user=1.19 sys=0.10, real=0.35 secs] 20.284: [GC [PSYoungGen: 4280K->64K(305856K)] 58813K->54596K(1004928K), 0.0040580 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 20.288: [Full GC (System) [PSYoungGen: 64K->0K(305856K)] [ParOldGen: 54532K->54532K(699072K)] 54596K->54532K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2360580 secs] [Times: user=1.01 sys=0.01, real=0.24 secs] 20.525: [GC [PSYoungGen: 4280K->96K(305856K)] 58813K->54628K(1004928K), 0.0030960 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 20.528: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54532K->54533K(699072K)] 54628K->54533K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2311320 secs] [Times: user=0.88 sys=0.00, real=0.23 secs] 20.760: [GC [PSYoungGen: 4280K->96K(305856K)] 58814K->54629K(1004928K), 0.0034940 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 20.764: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54533K->54533K(699072K)] 54629K->54533K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2381600 secs] [Times: user=0.85 sys=0.01, real=0.24 secs] 21.201: [GC [PSYoungGen: 5160K->354K(305856K)] 59694K->54888K(1004928K), 0.0019950 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 21.204: [Full GC (System) [PSYoungGen: 354K->0K(305856K)] [ParOldGen: 54533K->54792K(699072K)] 54888K->54792K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2358570 secs] [Times: user=0.98 sys=0.01, real=0.24 secs] 21.442: [GC [PSYoungGen: 4280K->64K(305856K)] 59073K->54856K(1004928K), 0.0022190 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 21.444: [Full GC (System) [PSYoungGen: 64K->0K(305856K)] [ParOldGen: 54792K->54792K(699072K)] 54856K->54792K(1004928K) [PSPermGen: 36300K->36300K(204800K)], 0.2475970 secs] [Times: user=0.95 sys=0.00, real=0.24 secs] 21.773: [GC [PSYoungGen: 11200K->741K(305856K)] 65993K->55534K(1004928K), 0.0030230 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 21.776: [Full GC (System) [PSYoungGen: 741K->0K(305856K)] [ParOldGen: 54792K->54376K(699072K)] 55534K->54376K(1004928K) [PSPermGen: 36538K->36537K(204800K)], 0.2550630 secs] [Times: user=1.05 sys=0.00, real=0.25 secs] 22.033: [GC [PSYoungGen: 4280K->96K(305856K)] 58657K->54472K(1004928K), 0.0032130 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 22.036: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54376K->54376K(699072K)] 54472K->54376K(1004928K) [PSPermGen: 36537K->36537K(204800K)], 0.2507170 secs] [Times: user=1.01 sys=0.01, real=0.25 secs] 22.289: [GC [PSYoungGen: 4280K->96K(305856K)] 58657K->54472K(1004928K), 0.0038060 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 22.293: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54376K->54376K(699072K)] 54472K->54376K(1004928K) [PSPermGen: 36537K->36537K(204800K)], 0.2640250 secs] [Times: user=1.07 sys=0.02, real=0.27 secs] 22.560: [GC [PSYoungGen: 4280K->128K(305856K)] 58657K->54504K(1004928K), 0.0036890 secs] [Times: user=0.01 sys=0.00, real=0.01 secs] 22.564: [Full GC (System) [PSYoungGen: 128K->0K(305856K)] [ParOldGen: 54376K->54377K(699072K)] 54504K->54377K(1004928K) [PSPermGen: 36537K->36536K(204800K)], 0.2585560 secs] [Times: user=1.08 sys=0.01, real=0.25 secs] 22.823: [GC [PSYoungGen: 4533K->96K(305856K)] 58910K->54473K(1004928K), 0.0020840 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 22.825: [Full GC (System) [PSYoungGen: 96K->0K(305856K)] [ParOldGen: 54377K->54377K(699072K)] 54473K->54377K(1004928K) [PSPermGen: 36536K->36536K(204800K)], 0.2505380 secs] [Times: user=0.99 sys=0.01, real=0.25 secs] 23.077: [GC [PSYoungGen: 4530K->32K(305856K)] 58908K->54409K(1004928K), 0.0016220 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 23.079: [Full GC (System) [PSYoungGen: 32K->0K(305856K)] [ParOldGen: 54377K->54378K(699072K)] 54409K->54378K(1004928K) [PSPermGen: 36536K->36536K(204800K)], 0.2320970 secs] [Times: user=0.95 sys=0.00, real=0.23 secs] 24.424: [GC [PSYoungGen: 87133K->800K(305856K)] 141512K->55179K(1004928K), 0.0038230 secs] [Times: user=0.01 sys=0.01, real=0.01 secs] 24.428: [Full GC (System) [PSYoungGen: 800K->0K(305856K)] [ParOldGen: 54378K->54950K(699072K)] 55179K->54950K(1004928K) [PSPermGen: 37714K->37712K(204800K)], 0.4105190 secs] [Times: user=1.25 sys=0.17, real=0.41 secs] 24.866: [GC [PSYoungGen: 4280K->256K(305856K)] 59231K->55206K(1004928K), 0.0041370 secs] [Times: user=0.01 sys=0.00, real=0.00 secs] 24.870: [Full GC (System) [PSYoungGen: 256K->0K(305856K)] [ParOldGen: 54950K->54789K(699072K)] 55206K->54789K(1004928K) [PSPermGen: 37720K->37719K(204800K)], 0.4160520 secs] [Times: user=1.12 sys=0.19, real=0.42 secs] 29.041: [GC [PSYoungGen: 262208K->12901K(275136K)] 316997K->67691K(974208K), 0.0170890 secs] [Times: user=0.11 sys=0.00, real=0.02 secs]

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  • Parsing custom time format with SimpleDateFormat

    - by ggrigery
    I'm having trouble parsing a date format that I'm getting back from an API and that I have never seen (I believe is a custom format). An example of a date: /Date(1353447000000+0000)/ When I first encountered this format it didn't take me long to see that it was the time in milliseconds with a time zone offset. I'm having trouble extracting this date using SimpleDateFormat though. Here was my first attempt: String weirdDate = "/Date(1353447000000+0000)/"; SimpleDateFormat sdf = new SimpleDateFormat("'/Date('SSSSSSSSSSSSSZ')/'"); Date d1 = sdf.parse(weirdDate); System.out.println(d1.toString()); System.out.println(d1.getTime()); System.out.println(); Date d2 = new Date(Long.parseLong("1353447000000")); System.out.println(d2.toString()); System.out.println(d2.getTime()); And output: Tue Jan 06 22:51:41 EST 1970 532301760 Tue Nov 20 16:30:00 EST 2012 1353447000000 The date (and number of milliseconds parsed) is not even close and I haven't been able to figure out why. After some troubleshooting, I discovered that the way I'm trying to use SDF is clearly flawed. Example: String weirdDate = "1353447000000"; SimpleDateFormat sdf = new SimpleDateFormat("S"); Date d1 = sdf.parse(weirdDate); System.out.println(d1.toString()); System.out.println(d1.getTime()); And output: Wed Jan 07 03:51:41 EST 1970 550301760 I can't say I've ever tried to use SDF in this way to just parse a time in milliseconds because I would normally use Long.parseLong() and just pass it straight into new Date(long) (and in fact the solution I have in place right now is just a regular expression and parsing a long). I'm looking for a cleaner solution that I can easily extract this time in milliseconds with the timezone and quickly parse out into a date without the messy manual handling. Anyone have any ideas or that can spot the errors in my logic above? Help is much appreciated.

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  • How do I remove implementing types from GWT’s Serialization Policy?

    - by Bluu
    The opposite of this question: http://stackoverflow.com/questions/138099/how-do-i-add-a-type-to-gwts-serialization-policy-whitelist GWT is adding undesired types to the serialization policy and bloating my JS. How do I trim my GWT whitelist by hand? Or should I at all? For example, if I put the interface List on a GWT RPC service class, GWT has to generate Javascript that handles ArrayList, LinkedList, Stack, Vector, ... even though my team knows we're only ever going to return an ArrayList. I could just make the method's return type ArrayList, but I like relying on an interface rather than a specific implementation. After all, maybe one day we will switch it up and return e.g. a LinkedList. In that case, I'd like to force the GWT serialization policy to compile for only ArrayList and LinkedList. No Stacks or Vectors. These implicit restrictions have one huge downside I can think of: a new member of the team starts returning Vectors, which will be a runtime error. So besides the question in the title, what is your experience designing around this?

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  • Where are the really high quality and complex Swing components?

    - by jouhni
    Looking at Swing, I have the feeling that it comes with many useful and reasonable atomic components in its core. And when I look at the Web there are hundrets of quickly plugged together components (among them many date/time pickers, pimped lists and tables), which have in common that I could easily write them on my own, if I needed them. When I build big software and come to the point where I need a domain-specific component which is really big, I mostly come to the point where I have to write it on my own, which, due to the point that they are not just plugged together lists and tables, isn't done qickly. So, the question is, why are there no Swing component galleries which contain more than just customized date/time pickers or lists with added tree support. Where are the components which really raise the level of abstraction, or are in best case domain-specific?

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  • Spring MVC with several configurations

    - by Michael Bulla
    Hello, for my spring-mvc application I created several types of configuration (unittest, integration, qa, production). All the configs are in one war-file, so there is only one type of application I create. Which configuration to take should be decided by the server, where the application is running. To decide what kind of configuration should be used, I have to look into a file. After that I can decide which configuration should be used by spring mvc. For now by convention there is always the -servlet.xml used. Is there a way how to decide dynamically which config to take? Regards, Michael

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  • Why do the outputs differ when I run this code using Netbeans 6.8 and Eclipse?

    - by Vimal Basdeo
    When I am running the following codes using Eclipse and Netbeans 6.8. I want to see the available COM ports on my computer. When running in Eclipse it is returning me all available COm ports but when running t in Netbeans, it does not seem to find any ports .. public static void test(){ Enumeration lists=CommPortIdentifier.getPortIdentifiers(); System.out.println(lists.hasMoreElements()); while (lists.hasMoreElements()){ CommPortIdentifier cn=(CommPortIdentifier)lists.nextElement(); if ((CommPortIdentifier.PORT_SERIAL==cn.getPortType())){ System.out.println("Name is serail portzzzz "+cn.getName()+" Owned status "+cn.isCurrentlyOwned()); try{ SerialPort port1=(SerialPort)cn.open("ComControl",800000); port1.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); System.out.println("Before get stream"); OutputStream out=port1.getOutputStream(); InputStream input=port1.getInputStream(); System.out.println("Before write"); out.write("AT".getBytes()); System.out.println("After write"); int sample=0; //while((( sample=input.read())!=-1)){ System.out.println("Before read"); //System.out.println(input.read() + "TEsting "); //} System.out.println("After read"); System.out.println("Receive timeout is "+port1.getReceiveTimeout()); }catch(Exception e){ System.err.println(e.getMessage()); } } else{ System.out.println("Name is parallel portzzzz "+cn.getName()+" Owned status "+cn.isCurrentlyOwned()+cn.getPortType()+" "); } } } Output with Netbeans false Output using Eclipse true Name is serail portzzzz COM1 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is serail portzzzz COM2 Owned status false Before get stream Before write After write Before read After read Receive timeout is -1 Name is parallel portzzzz LPT1 Owned status false2 Name is parallel portzzzz LPT2 Owned status false2

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  • How to pass data from selected rows using checkboxes from JSP to the server

    - by eddy
    Hi, I'd like to know if there's any way to send data to the server for the selected rows using the checkboxes I've put on those rows? I mean , how can I send only the data (in this case mileage ) of those selected rows (selected with the checkboxes) to the server ? see the image Here's the html code I use: <table> <thead> <tr class="tableheader"> <td width="10%"></td> <td width="30%">Vehicle</td> <td width="40%">Driver</td> <td width="10%">Mileage</td> </tr> </thead> <tbody> <c:forEach items="${list}" var="item"> <tr> <td align="center"> <input type="checkbox" name="selectedItems" value="c:out value="${item.numberPlate}"/>"/> </td> <td align="left"><c:out value="${item.numberPlate}"/></td> <td align="left"><c:out value="${item.driver.fullName}" /></td> <td align="left"><input type="text" name="mileage" value="" /></td> </tr> </c:forEach> </tbody> </table> I really hope you can give some guidance on this. Thanks in beforehand.

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  • Why does Hibernate 2nd level cache only cache queries within a session?

    - by Synesso
    Using a named query in our application and with ehcache as the provider, it seems that the query results are tied to the session within the cache. Any attempt to access the value from the cache for a second time results in a LazyInitializationException We have set lazy = true for the following mapping because this object is also used by another part of the system which does not require the reference... and we want to keep it lean. <class name="domain.ReferenceAdPoint" table="ad_point" mutable="false" lazy="false"> <cache usage="read-only"/> <id name="code" type="long" column="ad_point_id"> <generator class="assigned" /> </id> <property name="name" column="ad_point_description" type="string"/> <set name="synonyms" table="ad_point_synonym" cascade="all-delete-orphan" lazy="true"> <cache usage="read-only"/> <key column="ad_point_id" /> <element type="string" column="synonym_description" /> </set> </class> <query name="find.adpoints.by.heading">from ReferenceAdPoint adpoint left outer join fetch adpoint.synonyms where adpoint.adPointField.headingCode = ?</query> Here's a snippet from our hibernate.cfg.xml <property name="hibernate.cache.provider_class">net.sf.ehcache.hibernate.SingletonEhCacheProvider</property> <property name="hibernate.cache.use_query_cache">true</property> It doesn't seem to make sense that the cache would be constrained to the session. Why are the cached queries not usable outside of the (relatively short-lived) sessions?

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  • javax.servlet import cannot be resolved after moving web servlet

    - by Michael Kjörling
    I have written a small web servlet to run under Tomcat, using Eclipse Helios. In its old, non-source-controlled location, everything was fine, but now I need to add this to our source control system. Moving the old files out of the way, creating a new workspace, setting up the server connection and copying and importing the existing projects into the new workspace all worked fine once I figured out how to do it, but I can't get the servlet to build. Instead, I get a whole bunch of cannot be resolved to a type errors talking about various servlet class types; HttpServlet, HttpServletRequest, ServletException, etc. Another error that is almost certainly related is The import javax.servlet cannot be resolved. I am obviously missing something very basic, but I'm new to this (and not having the terminology really down pat probably doesn't help me Google for an answer). Any suggestions as to what I might be missing would be greatly appreciated.

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  • Embedding XSL Stylesheet into XML

    - by user700996
    I have the following XML: <?xml version="1.0" encoding="ISO-8859-1"?> <?xml-stylesheet type="text/xsl" href="http://www.fakedomain.com/sally.xsl"?> And the following content in sally.xsl: <?xml version="1.0" encoding="ISO-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <html> <body> <xsl:for-each select="documentcollection/document"> <p> <xsl:for-each select="rss/channel/item"> <xsl:value-of select="title"/><br /> <xsl:value-of select="description"/><br /> <xsl:value-of select="link"/><br /> </xsl:for-each> </p> </xsl:for-each> </body> </html> </xsl:template> </xsl:stylesheet> However, the browser displays the XML as though the XSL line is not present. Do you know why the browser is ignoring the XSL stylesheet? Is the style sheet wrong? Thanks

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  • Why is my panel not positioned correctly even after setting the boundaries?

    - by nutellafella
    I'm trying to make a simple GUI with radio buttons and I grouped them into one panel. I wanted it positioned on the leftmost side so I used the setBounds method. Whatever numbers I put on the parameters, the panel won't move. Are panels not affected by the setBounds method? Or is there another way to position my panel. Here's the snippet of my code: JPanel radioPanel = new JPanel(); radioPanel.setLayout(new GridLayout(3,1)); JRadioButton Rbutton1 = new JRadioButton("Credit Card"); JRadioButton Rbutton2 = new JRadioButton("E-Funds"); JRadioButton Rbutton3 = new JRadioButton("Check"); Rbutton3.setSelected(true); ButtonGroup Bgroup = new ButtonGroup(); Bgroup.add(Rbutton1); Bgroup.add(Rbutton2); Bgroup.add(Rbutton3); radioPanel.add(Rbutton1); radioPanel.add(Rbutton2); radioPanel.add(Rbutton3); radioPanel.setBounds(10,50,50,40); //this is where I'm trying to position the panel with the radio buttons paymentPanel.add(radioPanel); contentPane.add(paymentPanel); //contentPane is the frame contentPane.setVisible(true);

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  • Ant Tokenizer: Selecting an individual Token

    - by John Oxley
    I have the following ant task: <loadfile property="proj.version" srcfile="build.py"> <filterchain> <striplinecomments> <comment value="#"/> </striplinecomments> <linecontains> <contains value="Version" /> </linecontains> </filterchain> </loadfile> <echo message="${proj.version}" /> And the output is [echo] config ["Version"] = "v1.0.10-r4.2" How do I then use a tokenizer to get only v1.0.10-r4.2, the equivalent of | cut -d'"' -f4

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  • WebService Loggins

    - by KItis
    Hi, I have my webservice deployed on Apache tomcat 5.5. When I run my webservice using eclipse IDE, it prints logs to the location I have specified . I have put log4j property file for my webservice in the apache-tomcat-5.5.28/common/classes folder. Problem is , when i run this using webservice .aar file which is put in to apache-tomcat-5.5.28/webapps/axis2/WEB-INF/classes folder in the webservice ,it does not print logs. Could anyone tell me what is going wrong here. why does it print logs when running from eclipse ide and, why is it not printing logs when it is started

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  • Multi-Column Join in Hibernate/JPA Annotations

    - by bowsie
    I have two entities which I would like to join through multiple columns. These columns are shared by an @Embeddable object that is shared by both entities. In the example below, Foo can have only one Bar but Bar can have multiple Foos (where AnEmbeddableObject is a unique key for Bar). Here is an example: @Entity @Table(name = "foo") public class Foo { @Id @Column(name = "id") @GeneratedValue(generator = "seqGen") @SequenceGenerator(name = "seqGen", sequenceName = "FOO_ID_SEQ", allocationSize = 1) private Long id; @Embedded private AnEmbeddableObject anEmbeddableObject; @ManyToOne(targetEntity = Bar.class, fetch = FetchType.LAZY) @JoinColumns( { @JoinColumn(name = "column_1", referencedColumnName = "column_1"), @JoinColumn(name = "column_2", referencedColumnName = "column_2"), @JoinColumn(name = "column_3", referencedColumnName = "column_3"), @JoinColumn(name = "column_4", referencedColumnName = "column_4") }) private Bar bar; // ... rest of class } And the Bar class: @Entity @Table(name = "bar") public class Bar { @Id @Column(name = "id") @GeneratedValue(generator = "seqGen") @SequenceGenerator(name = "seqGen", sequenceName = "BAR_ID_SEQ", allocationSize = 1) private Long id; @Embedded private AnEmbeddableObject anEmbeddableObject; // ... rest of class } Finally the AnEmbeddedObject class: @Embeddable public class AnEmbeddedObject { @Column(name = "column_1") private Long column1; @Column(name = "column_2") private Long column2; @Column(name = "column_3") private Long column3; @Column(name = "column_4") private Long column4; // ... rest of class } Obviously the schema is poorly normalised, it is a restriction that AnEmbeddedObject's fields are repeated in each table. The problem I have is that I receive this error when I try to start up Hibernate: org.hibernate.AnnotationException: referencedColumnNames(column_1, column_2, column_3, column_4) of Foo.bar referencing Bar not mapped to a single property I have tried marking the JoinColumns are not insertable and updatable, but with no luck. Is there a way to express this with Hibernate/JPA annotations? Thank you.

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  • Google App Engine - Cannot See Children in Datastore Viewer

    - by Taylor L
    I have the following kinds/relationships in my datastore: UserAccount 1-to-1 PersistentLogin 1-to-many PersistentLogins They are all in the same entity group and UserAccount is the parent. Should I expect to see the other kinds in the datastore viewer? Currently, I only see UserAccount entities, but I'm pretty confident the other entities are there because my code is working as expected. Is this just a nuance of the datastore viewer?

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  • Struts 2 Select tag

    - by nathj07
    I'm pretty new to the jsp and struts way of doing things and so far I like what I see. My current question is with the use of the struts select tag. I have a page that displays a number of dropdown boxes using struts select currently the options are hard coded in the jsp. I would like to populate them based on a properties file. However I have no idea where to start. I assume I need to take the contents of a properties file into an Array (of some sort) and assign that to the select tag. My questions are: Where does the code t build the array go? How do I connect that array to the select tag?

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