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  • Tapestry + JaxB conflict

    - by alex
    Hi all ! I need your help to resolve a conflict between Tapestry and JaxB. The error is : com.sun.xml.stream.ZephyrParserFactory cannot be cast to org.codehaus.stax2.XMLInputFactory2 I find a way to resolve it, but it is for jetty : http://tynamo.org/tapestry-resteasy+guide The solution seems to be to add a system properties to declare : javax.xml.stream.XMLInputFactory = com.ctc.wstx.stax.WstxInputFactory But i don't know how to do this for Tomcat. I try to do it int he web.xml like : <env-entry> <env-entry-name> javax.xml.stream.XMLInputFactory </env-entry-name> <env-entry-value> com.ctc.wstx.stax.WstxInputFactory </env-entry-value> <env-entry-type> com.ctc.wstx.stax.WstxInputFactory </env-entry-type> </env-entry> without success... I am also aware for another solution :) thx for helping me.

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  • How to reliably measure available memory in Linux?

    - by Alex B
    Linux /proc/meminfo shows a number of memory usage statistics. MemTotal: 4040732 kB MemFree: 23160 kB Buffers: 163340 kB Cached: 3707080 kB SwapCached: 0 kB Active: 1129324 kB Inactive: 2762912 kB There is quite a bit of overlap between them. For example, as far as I understand, there can be active page cache (belongs to "cached" and "active") and inactive page cache ("inactive" + "cached"). What I want to do is to measure "free" memory, but in a way that it includes used pages that are likely to be dropped without a significant impact on overall system's performance. At first, I was inclined to use "free" + "inactive", but Linux's "free" utility uses "free" + "cached" in its "buffer-adjusted" display, so I am curious what a better approach is. When the kernel runs out of memory, what is the priority of pages to drop and what is the more appropriate metric to measure available memory?

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  • Going "behind Hibernate's back" to update foreign key values without an associated entity

    - by Alex Cruise
    Updated: I wound up "solving" the problem by doing the opposite! I now have the entity reference field set as read-only (insertable=false updatable=false), and the foreign key field read-write. This means I need to take special care when saving new entities, but on querying, the entity properties get resolved for me. I have a bidirectional one-to-many association in my domain model, where I'm using JPA annotations and Hibernate as the persistence provider. It's pretty much your bog-standard parent/child configuration, with one difference being that I want to expose the parent's foreign key as a separate property of the child alongside the reference to a parent instance, like so: @Entity public class Child { @Id @GeneratedValue Long id; @Column(name="parent_id", insertable=false, updatable=false) private Long parentId; @ManyToOne(cascade=CascadeType.ALL) @JoinColumn(name="parent_id") private Parent parent; private long timestamp; } @Entity public class Parent { @Id @GeneratedValue Long id; @OrderBy("timestamp") @OneToMany(mappedBy="parent", cascade=CascadeType.ALL, fetch=FetchType.LAZY) private List<Child> children; } This works just fine most of the time, but there are many (legacy) cases when I'd like to put an invalid value in the parent_id column without having to create a bogus Parent first. Unfortunately, Hibernate won't save values assigned to the parentId field due to insertable=false, updatable=false, which it requires when the same column is mapped to multiple properties. Is there any nice way to "go behind Hibernate's back" and sneak values into that field without having to drop down to JDBC or implement an interceptor? Thanks!

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  • Migrating from Physical SQL (SQL2000) To VMWare machine (SQL2008) - Transferring Large DB

    - by alex
    We're in the middle of migrating from a windows & SQL 2000 box to a Virtualised Win & SQL 2k8 box The VMWare box is on a different site, with better hardware, connectivity etc... The old(current) physical machine is still in constant use - I've taken a backup of the DB on this machine, which is 21GB Transfering this to our virtual machine took around 7+ hours - which isn't ideal when we do the "actual" switchover. My question is - How should I handle the migration better? Could i set up our current machine to do log shipping to the VM machine to keep up to date? then, schedule down time out of hours to do the switch over? Is there a better way?

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  • Partioning with Hibernate

    - by Alex
    Hello, We have a requirement to delete data in the range of 200K from database everyday. Our application is Java/JEE based using Oracle DB and Hibernate ORM tool. We explored various options like Hibernate batch processing Stored procedure Database partitioning Our DBA suggests database partitioning is the best way to go, so we can easily recreate and drop the partitioned table everyday. Now the issue is we have 2 kinds of data, one which we want to delete everyday and the other which we want to keep it. Suppose this data is stored in table "Trade". Now with partitioning, we have 2 tables "Trade". We have already existing Hibernate based DAO layer to fetch/store trades from/to DB. When we decide to partition the database, how can we control the trades to go in which of the two tables through hibernate. Basically I want , the trades need to be deleted by end of the day, to go in partitioned table and the trades I want to keep, in main table. Please suggest how can this be possible with Hibernate. We may add an additional column to identify the trades to be deleted but how can we ensure these trades should go to partitioned trade table using hibernate. I would appreciate if someone can suggest any better approach in case we are on wrong path.

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  • Why won't my span do a JQuery event click when I click it?

    - by alex
    .tablePlayButton { display: block; width: 16px; background: transparent; margin-top:2px; margin-right: -10px; margin-left: 2px; height:17px; } tr:hover .tablePlayButton { background: url(ton.png) top left no-repeat; } tr:hover .tablePlayButton:active { background-position: bottom left; } tr:hover .tablePlayButton.playing, .tablePlayButton.playing { background: url(ton2.png) top right no-repeat; } tr:hover .tablePlayButton.playing:active, .tablePlayButton.playing:active { background-position: bottom right; } I draw the span like this: <span class="tablePlayButton"></span> It's got a little button. WHen I click it, nothing happens: $(".tablePlayButton").click(function(){ alert('hi'); });

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  • Create new or update existing entity at one go with JPA

    - by Alex R
    A have a JPA entity that has timestamp field and is distinguished by a complex identifier field. What I need is to update timestamp in an entity that has already been stored, otherwise create and store new entity with the current timestamp. As it turns out the task is not as simple as it seems from the first sight. The problem is that in concurrent environment I get nasty "Unique index or primary key violation" exception. Here's my code: // Load existing entity, if any. Entity e = entityManager.find(Entity.class, id); if (e == null) { // Could not find entity with the specified id in the database, so create new one. e = entityManager.merge(new Entity(id)); } // Set current time... e.setTimestamp(new Date()); // ...and finally save entity. entityManager.flush(); Please note that in this example entity identifier is not generated on insert, it is known in advance. When two or more of threads run this block of code in parallel, they may simultaneously get null from entityManager.find(Entity.class, id) method call, so they will attempt to save two or more entities at the same time, with the same identifier resulting in error. I think that there are few solutions to the problem. Sure I could synchronize this code block with a global lock to prevent concurrent access to the database, but would it be the most efficient way? Some databases support very handy MERGE statement that updates existing or creates new row if none exists. But I doubt that OpenJPA (JPA implementation of my choice) supports it. Event if JPA does not support SQL MERGE, I can always fall back to plain old JDBC and do whatever I want with the database. But I don't want to leave comfortable API and mess with hairy JDBC+SQL combination. There is a magic trick to fix it using standard JPA API only, but I don't know it yet. Please help.

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  • jQuery plugin to wrap text around images + support IE6

    - by Alex
    This is a tall order, but is there a jQuery or Mootools (or other framework) plugin to wrap text around images and support IE6? I've tried the jQSlickWrap, but unless the browser supports HTML 5, you're out of luck. What's strange is that IE 6 supports the jQuery Background Canvas plugin, which uses the CANVAS object (via excanvas.js) just as this plugin does. Thanks.

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  • Changing ylim (axis limits) drops data falling outside range. How can this be prevented?

    - by Alex Holcombe
    df <- data.frame(age=c(10,10,20,20,25,25,25),veg=c(0,1,0,1,1,0,1)) g=ggplot(data=df,aes(x=age,y=veg)) g=g+stat_summary(fun.y=mean,geom="point") Points reflect mean of veg at each age, which is what I expected and want to preserve after changing axis limits with the command below. g=g+ylim(0.2,1) Changing axis limits with the above command unfortunately causes veg==0 subset to be dropped from the data, yielding "Warning message: Removed 4 rows containing missing values (stat_summary)" This is bad because now the data plot (stat_summary mean) omits the veg==0 points. How can this be prevented? I simply want to avoid showing the empty part of the plot- the ordinate from 0 to .2, but not drop the associated data from the stat_summary calculation.

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  • Does this incorporate JavaScript closures?

    - by alex
    In trying to learn JavaScript closures, I've confused myself a bit. From what I've gathered over the web, a closure is... Declaring a function within another function, and that inner function has access to its parent function's variables, even after that parent function has returned. Here is a small sample of script from a recent project. It allows text in a div to be scrolled up and down by buttons. var pageScroll = (function() { var $page, $next, $prev, canScroll = true, textHeight, scrollHeight; var init = function() { $page = $('#secondary-page'); // reset text $page.scrollTop(0); textHeight = $page.outerHeight(); scrollHeight = $page.attr('scrollHeight'); if (textHeight === scrollHeight) { // not enough text to scroll return false; }; $page.after('<div id="page-controls"><button id="page-prev">prev</button><button id="page-next">next</button></div>'); $next = $('#page-next'); $prev = $('#page-prev'); $prev.hide(); $next.click(scrollDown); $prev.click(scrollUp); }; var scrollDown = function() { if ( ! canScroll) return; canScroll = false; var scrollTop = $page.scrollTop(); $prev.fadeIn(500); if (scrollTop == textHeight) { // can we scroll any lower? $next.fadeOut(500); } $page.animate({ scrollTop: '+=' + textHeight + 'px'}, 500, function() { canScroll = true; }); }; var scrollUp = function() { $next.fadeIn(500); $prev.fadeOut(500); $page.animate({ scrollTop: 0}, 500); }; $(document).ready(init); }()); Does this example use closures? I know it has functions within functions, but is there a case where the outer variables being preserved is being used? Am I using them without knowing it? Thanks Update Would this make a closure if I placed this beneath the $(document).ready(init); statement? return { scrollDown: scrollDown }; Could it then be, if I wanted to make the text scroll down from anywhere else in JavaScript, I could do pageScroll.scrollDown(); I'm going to have a play around on http://www.jsbin.com and report back

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  • Trigger events from Firefox browser extension?

    - by Alex
    Hello, I want to trigger events from a firefox extension, specifically click events. I've tried jQuery's .click() as well as the whole: var evt = document.createEvent("HTMLEvents"); evt.initEvent("click", true, false ); toClick[0].dispatchEvent(evt); This is not working for me, and I was wondering if this is even possible? (to trigger events from a firefox extension)? If so, how does one do it?

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  • Google Maps custom marker - can the iframe accept one like the static maps?

    - by alex
    I was reading the static maps API, and it says you can include a custom marker in the GET params. You simply link to an image file. I now have a second Google Map within an iframe, and was wondering if you can attach custom markers via the GET params to it? Here is the src attribute of the iframe currently. http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=111+Fake+Street+Noosaville+Queensland+Australia&ie=UTF8&output=embed I can't seem to find the documentation on how to do this, if possible. Is this possible?

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  • Using strtok() in a loop in C?

    - by Alex Xander
    I am trying to use strtok() in nested loop. But this is not giving me desired results. Possibly because they are using same memory location. My code is of the form:- char *token1 = strtok(Str1, "%"); while(token1 != NULL ) { char *token2 = strtok(Str2, "%"); while(token2 != NULL ) { //DO SMTHING token2 = strtok(NULL, "%"); } token1 = strtok(NULL, "%"); // Do something more }

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  • How to disable scaling in JFreeChart?

    - by Alex Arnon
    Hi All, We're using JFreeChart to build an engine to display graphs. This is a web service that runs on Tomcat + Java 1.5.0, and renders charts to PNGs and JPEGs (using ChartUtilities.writeChartAs{PNG,JPEG}() ). We've run into a problem where JFreeChart seems to scale everything inside the Plot area, but only by a few pixels. The result is that the graph looks inconsistent, e.g.: Minor ticks are sometimes stretched horizontally, so that they seem to be two pixels wide instead of one. We use a small image in the top-right of the plot area as a watermark. This is stretched by one pixel horizontally and vertically somewhere near (but not exactly) its middle. Background grid lines seem to appear on sub-pixel boundaries. I have not found a way to create an accurately dotted grid line. We have tried both 1.0.9 and 1.0.13, with exactly the same results (except for the minor ticks, which were not available in the older version). Also, rendering the image to a Frame instead of JPEG/PNG produced an identical result. Help is greatly appreciated, in advance :)

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  • Downloadable HTML Test Corpus

    - by Alex Jordan
    I am working on a browser plug-in for Firefox, and I would like to be able to do some automated testing to make sure that it's handling a variety of different HTML/JavaScript features correctly. Does anyone know of a good downloadable corpus of HTML and/or JavaScript pages that could be used for this type of testing?

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  • Reversing the effects of mkimage to get an original gzipped file back

    - by Alex Marshall
    Hello, We develop for a specific embedded device at our company, and part of that is making initial root disks that get loaded onto the devices over ethernet via netboot. We've experienced some problems, and as a result, the original folder with the contents of the initial root disks was lost along with its backups, but we do still have the initrd images, that have been created by gzipping the contents of a ramdisk that's been mounted as a local loop device, and then running mkimage on the gzipped file. Is there any way to undo the effects of mkimage and obtain the original gzipped content so that we can recover the original images ?

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  • How do I make PyScripter work? Says it cant find python26.dll

    - by Alex
    I installed PyScript to try it out but it just wont start. It only gives me the error: "Error126: Could not open Dll "python26.dll" followed by: "Python could not be properly initialized. We must quit." I think this may have something to do with the PYTHONPATH but since I'm a newbie and dont know what it is or exactly what to put in the PYTHONPATH, after some googling, I ask here. Also, when I tried to install wxPython it was impossible becouse the PYTHONPATH could not be found.(Just a side note) I have installed ActivePython 2.6 and the PATH is set so I can access python in cmd.

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  • Round bottom corners on Android Bitmap?

    - by alex
    Hey all, what would be best practice for clipping the bottom borders of a Bitmap? Just manipulate the Bitmap itself or overlay an alpha mask drawable or ...? The whole story: I've a Listview which looks like the iPhone's grouped UITableView style. I would like to display a Bitmap in the last row, but for now the Bitmap overlaps my custom background drawable of the Listview cell. Thx in advance!

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  • How do I write this URL in Django?

    - by alex
    (r'^/(?P<the_param>[a-zA-z0-9_-]+)/$','myproject.myapp.views.myview'), How can I change this so that "the_param" accepts a URL(encoded) as a parameter? So, I want to pass a URL to it. mydomain.com/http%3A//google.com

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  • Force close when starting new activity

    - by Alex
    I'm trying to launch a new activity from my main activity, but I just get error codes all the time. Heres my main activity; public class gunstats extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button button4 = (Button)findViewById(R.id.button4); button4.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(gunstats.this, more.class); startActivity(intent); } }); } } and the activity that is being called from my main class; public class more extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final MediaPlayer mp = MediaPlayer.create(this, R.raw.deagle); Button buttonm1 = (Button)this.findViewById(R.id.buttonm1); buttonm1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mp.start(); } }); } } And there's nothing wrong in the manifest Heres my logcat: 01-08 16:33:17.647: ERROR/AndroidRuntime(552): Uncaught handler: thread main exiting due to uncaught exception 01-08 16:33:17.676: ERROR/AndroidRuntime(552): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.gunstats/com.gunstats.more}; have you declared this activity in your AndroidManifest.xml? 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1480) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1454) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.app.Activity.startActivityForResult(Activity.java:2660) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.app.Activity.startActivity(Activity.java:2704) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at com.gunstats.gunstats$4.onClick(gunstats.java:64) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.View.performClick(View.java:2344) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.View.onTouchEvent(View.java:4133) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.widget.TextView.onTouchEvent(TextView.java:6504) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.View.dispatchTouchEvent(View.java:3672) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1712) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1202) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.app.Activity.dispatchTouchEvent(Activity.java:1987) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1696) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.view.ViewRoot.handleMessage(ViewRoot.java:1658) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.os.Handler.dispatchMessage(Handler.java:99) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.os.Looper.loop(Looper.java:123) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at android.app.ActivityThread.main(ActivityThread.java:4203) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at java.lang.reflect.Method.invokeNative(Native Method) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at java.lang.reflect.Method.invoke(Method.java:521) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 01-08 16:33:17.676: ERROR/AndroidRuntime(552): at dalvik.system.NativeStart.main(Native Method) What is causing this force close?

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  • XNA .FBX Vertex Color Missing

    - by Alex
    When I vertex paint and export my models from Blender (or Maya) for use in my XNA 4.0 project, I somehow lose the vertex color channel for the model. I use no custom model object or content pipelines and my own shader throws me the error: The current vertex declaration does not include all the elements required by the current vertex shader. Color0 is missing. I tryed to reopen the model in other modeling tools and the vertex colors are there. What could cause the vertex color channel to not get loaded in XNA 4.0? Here's a temporary link to the FBX file(server refuses to send a fbx, so rename the .jpg file to .fbx after downloading) http://resources.gamestack.org/BananaBush.jpg

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