Example scenario: Create two SynchronizedSets (s1 and s2) Pass them to two threads (T1 and T2) Start the threads T1's run() : while (forever) s1.equals(s2) T2's run() : while (forever) s2.equals(s1) What happens? - SynchronizedSet's equals acquires lock on itself It computes the length of the param that's passed in an...
First of all please don't close this question as duplicate of http://stackoverflow.com/questions/1181888/what-does-xmlns-in-xml-mean, Actually, i am having an entry in my servlet.xml, xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr Now what i think is, dwr is the prefix we are going to use, like <dwr:configuration> ...
I have a simple class - will call it Animal. I'd like to fire off an event in the Animal class and have it handled in the class where I instantiated the Animal class. In the event handler, I want to pass an Integer value How do I pull off something simple like that? ...
I have encoding problem with iText (http://www.lowagie.com/iText/). I load data from database and insert it as html to pdf with iText, for some reason my non-english (Finnish ä,ö etc) characters don't show up correctly. Following example shows how insert text to html: text = "<p>" + data + "</p>"; HTMLWorker htmlWorker = new HTMLWorke...
Hi all, I am writing a utility in Java that reads a stream which may contain both text and binary data. I want to avoid having I/O wait. To do that I create a thread to keep reading the data (and wait for it) putting it into a buffer, so the clients can check avialability and terminate the waiting whenever they want (by closing the inpu...
Hi , I am getting SQLite closable exception I am calling deactivate and close on cursor still i am getting the same exception . can any one tell me what i am doing wrong? ...
I am facing a problem in hibernate property formula field. Not able to combine both table columns. shift_id column belongs to parent table of job_card and duration column belongs to child table of job_card_idle_time. but it consider both columns are belongs to parent table of job_card. <property name="utilization" f...
I have a Queue configured in the Rational Application Developer for WebSphere, using a "V5 default messaging provider" and a Websphere6.1 I now try to access it using a standalone app (JUnit Test), in order to put some messages in it. I currently use the following code: Hashtable env = new Hashtable(); env.put(Context.INITIAL_CONTE...
I'm trying to get started with Eclipse/Java/Scala on a MacBook. The installed JDK was 1.5. The SDT plugin for Scala requires 1.6 which was included in an OS update, but I also manually installed a package from Apple to update 1.6. The problem is that I cannot run anything from Eclipse. I always get the following error: An internal erro...
I often need to generate content dynamically from a servlet / restlet or whatever, and don't know the length ahead of time. If the client is a browser, the progress bar doesn't work properly, because I haven't set the Content-Length header. Is there any way of setting an estimated content length, so the progress bar works "more or less"?...
Hi All, This is a common problem. I'm using 2 libraries A.jar and B.jar and these depend on different versions of the same jar. Let's say that at runtime I need THIS.x.x.x.jar MY.jar -> A.jar -> THIS.1.0.0.jar -> B.jar -> C.jar -> THIS.5.0.0.jar I can compile the specific jar (A.jar/B.jar) against its dependency but at r...
Hi, Do you know a technology which can provide me a portlet-like interface? But I do not want to use JSR 168/268 portlet specifications and a portlet container. The reason is: My web app is a product which can be installed on the client's server (it can be weblogic/websphere/tomcat). Packing the portlets container along with my applica...
I am coding an application that creates JVMs and needs to control the memory usage of the processes spawned by the JVM. ...
I was reviewing the following link and found out that javax.faces.webapp.ValidatorTag is deprecated and replaced by ValidatorELTag, however I can't seem to find any good information about this. I want to create a Regular Expression Validator which takes input: regex and error message. Meaning I would want to have a control like this: ...
I'm trying to parse the time stamps written in some xml files. Most to the time time stamps are something like 2009-07-22-07:00 but some times I find them something like 2009-07-22Z or 2009-07-22z. Kindly help me how to interpret these Zs and how to parse them. I thing these z or Z is related to the time zone. Any workarounds to parse th...
I have been looking at upgrading from 2.4 to 2.9 and noticed all the contrived code that handles attributes. Just wondering if anyone has any opinions if this will change given its a .9 and things will change when 3.0 is out. I am confused how creating attributes by reflection and stashing attributes in a map can be as performant as jus...
Why may this happen? The thing is that monitor object is not null for sure, but still we get this exception quite often: java.lang.IllegalMonitorStateException: (m=null) Failed to get monitor for (tIdx=60) at java.lang.Object.wait(Object.java:474) at ... The code that provokes this is a simple pool solution: publi...
This is probably a dumb question but thought to ask it. In java we can either import single classes as well as the whole set of classes (a package). As an example import java.util.* includes import java.util.ArrayList; import java.util.Date; import java.util.Enumeration; import java.util.HashSet; import java.util.Hashtable; import ...
HI guys! I try to call Axis2 WSDL2JAVA in my ant file to create a WSDL client. But it's broken because I have whitespaces in my path (I'm on Windows...). This is my ant <property name="wsdl.file" location="C:\path with whitespaces\project\subdir\my.wsdl"/> ... <target name="generate.client" depends="Clean.Client"> <java classname=...
How could I encapsulate the authentication logic, the URL and the label of a Menu item when I make use of e.g. a Dojo MenuItem widget? What I currently have is this: <auth:isRole role="admin"> <div dojoType="widget.Menu.MenuItem"> <a href="<html:rewrite page="... complicated url ..."/>"> <bean:message key="label.goes.here"...