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  • java.net.SocketTimeoutException: Read timed out

    - by Rafael Soto
    Hi Folks, I have an application with client server architecture. The client use Java Web Start with Java Swing / AWT and the sert uses HTTP server / Servlet with Tomcat. The communication is made from the serialization of objects, create a ObjectOutput serializes a byte array and send to the server respectively called the ObjectInputStream and deserializes. The application follows communicating correctly to a certain time of concurrency where starting to show error "SocketException read timeout". The erro happens when the server invoke the method ObjectInputStream.getObject() in my servlet doPost method. The tomcat will come slow and the errors start to decrease server response time until the crash time where i must restart the server and after everything works. Someone went through this problem ?

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  • Building an XML editor in java and RichFaces

    - by Mark Lewis
    Hello I'm building an XML editor using the above technologies. In essence, I want to read in a whole XML file to a java object, and refer using this object to each element in the XML node tree (grouped into entries) to display the content locked, have separate padlocks for the user to click to 'unlock' an entry allow overwriting of the data, and to submit this entry. 'Add entry', 'Duplicate entry', 'Delete entry' are also functions I'd like to add. I already use dom4j and XPath to access areas of the XML file so some of the work in theory is already done. Given the above, I was going to use these two together with inplaceInputs to allow the user to edit the XML and JSF validators to check the data coming in. Is this the best way to approach this problem, or is there a more straightforward route than XPathing a whole record? I started looking at jaxb but I'm new at java and jsf but I've got the feeling I won't be by the end.. Thanks

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  • Java char literal to C# char literal

    - by Kristoffersen
    Hi. I am maintaining some Java code that I am currently converting to C#. The Java code is doing this: sendString(somedata + '\000'); And in C# I am trying to do the same: sendString(somedata + '\000'); But on the '\000' VS2010 tells me that "Too many characters in character literal". How can I use '\000' in C#? I have tried to find out what the character is, but it seems to be " " or some kind of newline-character. Do you know anything about the issue? Thanks!

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  • Automatic type conversion in Java?

    - by davr
    Is there a way to do automatic implicit type conversion in Java? For example, say I have two types, 'FooSet' and 'BarSet' which both are representations of a Set. It is easy to convert between the types, such that I have written two utility methods: /** Given a BarSet, returns a FooSet */ public FooSet barTOfoo(BarSet input) { /* ... */ } /** Given a FooSet, returns a BarSet */ public BarSet fooTObar(FooSet input) { /* ... */ } Now say there's a method like this that I want to call: public void doSomething(FooSet data) { /* .. */ } But all I have is a BarSet myBarSet...it means extra typing, like: doSomething(barTOfoo(myBarSet)); Is there a way to tell the compiler that certain types can automatically be cast to other types? I know this is possible in C++ with overloading, but I can't find a way in Java. I want to just be able to type: doSomething(myBarSet); And the compiler knows to automatically call barTOfoo()

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  • LXML E builder for java?

    - by directedition
    There is one thing I really love about LXML, and that the E builder. I love that I can throw XML together like this: message = E.Person( E.Name( E.First("jack") E.Last("Ripper") ) E.PhoneNumber("555-555-5555") ) To make: <Person> <Name> <First>Jack</First> <Last>Ripper</Last> </Name> <PhoneNumber>555-555-5555</PhoneNumber> </Person> As opposed to the painstaking way DOM works. I am going to be moving a bunch of my software to Java soon and it is very very heavy on its usage of E. Does Java have anything near equivalent to that usage?

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  • java generics covariance

    - by soocracy42
    I am having trouble understanding the following article: http://www.ibm.com/developerworks/java/library/j-jtp01255.html Under, Generics are not covariant the author states, Because ln is a List, adding a Float to it seems perfectly legal. But if ln were aliased with li, then it would break the type-safety promise implicit in the definition of li -- that it is a list of integers, which is why generic types cannot be covariant. I can't understand the part where it says "if ln were aliased with li". What does the author means by alias?(reference?). The code snippet above the quoted line seems to illustrate WHAT is illegal in java and not WHY. It would be very helpful to me if somebody could explain with an example. Thanks in advance.

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  • java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z

    - by Panayiotis Karabassis
    I am getting this error: java.lang.NoSuchMethodError: javax.persistence.OneToMany.orphanRemoval()Z These are the jars in my classpath: com.sun.faces/jsf-api/jars/jsf-api-2.0.0.jar com.sun.faces/jsf-impl/jars/jsf-impl-2.0.0.jar org.apache.myfaces.orchestra/myfaces-orchestra-core20/jars/myfaces-orchestra-core20-1.5-SNAPSHOT.jar commons-lang/commons-lang/jars/commons-lang-2.1.jar commons-logging/commons-logging/jars/commons-logging-1.1.1.jar org.springframework/spring/jars/spring-2.5.6.jar commons-el/commons-el/jars/commons-el-1.0.jar org.richfaces.ui/richfaces-ui/jars/richfaces-ui-3.3.3.Final.jar org.richfaces.framework/richfaces-api/jars/richfaces-api-3.3.3.Final.jar commons-collections/commons-collections/jars/commons-collections-3.2.jar commons-beanutils/commons-beanutils/jars/commons-beanutils-1.8.0.jar org.richfaces.framework/richfaces-impl-jsf2/jars/richfaces-impl-jsf2-3.3.3.Final.jar com.sun.facelets/jsf-facelets/jars/jsf-facelets-1.1.14.jar org.hibernate/hibernate-core/jars/hibernate-core-3.6.0.Final.jar antlr/antlr/jars/antlr-2.7.6.jar dom4j/dom4j/jars/dom4j-1.6.1.jar org.hibernate/hibernate-commons-annotations/jars/hibernate-commons-annotations-3.2.0.Final.jar org.slf4j/slf4j-api/jars/slf4j-api-1.6.1.jar org.hibernate.javax.persistence/hibernate-jpa-2.0-api/jars/hibernate-jpa-2.0-api-1.0.0.Final.jar javax.transaction/jta/jars/jta-1.1.jar org.hibernate/hibernate-c3p0/jars/hibernate-c3p0-3.6.0.Final.jar c3p0/c3p0/jars/c3p0-0.9.1.jar org.hibernate/hibernate-entitymanager/jars/hibernate-entitymanager-3.6.0.Final.jar cglib/cglib/jars/cglib-2.2.jar asm/asm/jars/asm-3.1.jar javassist/javassist/jars/javassist-3.12.0.GA.jar org.hibernate/hibernate-search/jars/hibernate-search-3.3.0.Final.jar org.hibernate/hibernate-search-analyzers/jars/hibernate-search-analyzers-3.3.0.Final.jar org.apache.lucene/lucene-core/jars/lucene-core-3.0.3.jar org.apache.lucene/lucene-analyzers/jars/lucene-analyzers-3.0.3.jar mysql/mysql-connector-java/jars/mysql-connector-java-5.1.13.jar com.ocpsoft/prettyfaces-jsf2/jars/prettyfaces-jsf2-3.0.1.jar commons-digester/commons-digester/jars/commons-digester-2.0.jar org.slf4j/slf4j-log4j12/jars/slf4j-log4j12-1.6.1.jar log4j/log4j/bundles/log4j-1.2.16.jar xom/xom/jars/xom-1.2.5.jar xml-apis/xml-apis/jars/xml-apis-1.3.03.jar xerces/xercesImpl/jars/xercesImpl-2.8.0.jar xalan/xalan/jars/xalan-2.7.0.jar org.jboss.jsfunit/jboss-jsfunit-core/jars/jboss-jsfunit-core-1.3.0.Final.jar net.sourceforge.htmlunit/htmlunit/jars/htmlunit-2.8.jar xalan/xalan/jars/xalan-2.7.1.jar xalan/serializer/jars/serializer-2.7.1.jar xml-apis/xml-apis/jars/xml-apis-1.3.04.jar commons-collections/commons-collections/jars/commons-collections-3.2.1.jar commons-lang/commons-lang/jars/commons-lang-2.4.jar org.apache.httpcomponents/httpclient/jars/httpclient-4.0.1.jar org.apache.httpcomponents/httpcore/jars/httpcore-4.0.1.jar commons-codec/commons-codec/jars/commons-codec-1.4.jar org.apache.httpcomponents/httpmime/jars/httpmime-4.0.1.jar org.apache.james/apache-mime4j/jars/apache-mime4j-0.6.jar net.sourceforge.htmlunit/htmlunit-core-js/jars/htmlunit-core-js-2.8.jar xerces/xercesImpl/jars/xercesImpl-2.9.1.jar net.sourceforge.nekohtml/nekohtml/jars/nekohtml-1.9.14.jar net.sourceforge.cssparser/cssparser/jars/cssparser-0.9.5.jar org.w3c.css/sac/jars/sac-1.3.jar commons-io/commons-io/jars/commons-io-1.4.jar cactus/cactus/jars/cactus-13-1.7.1.jar cactus/cactus-ant/jars/cactus-ant-13-1.7.1.jar commons-httpclient/commons-httpclient/jars/commons-httpclient-2.0.2.jar junit/junit/jars/junit-3.8.1.jar aspectj/aspectjrt/jars/aspectjrt-1.2.1.jar cargo/cargo/jars/cargo-0.5.jar ant/ant/jars/ant-1.5.4.jar and this is my ivy.xml: <dependencies> <!-- JSF 2.0 RI --> <dependency org="com.sun.faces" name="jsf-api" rev="2.0.0"/> <dependency org="com.sun.faces" name="jsf-impl" rev="2.0.0"/> <!-- MyFaces Orchestra --> <dependency org="org.apache.myfaces.orchestra" name="myfaces-orchestra-core20" rev="1.5-SNAPSHOT"/> <dependency org="org.springframework" name="spring" rev="2.5.6"/> <dependency org="commons-el" name="commons-el" rev="1.0"/> <!-- RichFaces --> <dependency org="org.richfaces.ui" name="richfaces-ui" rev="3.3.3.Final"/> <dependency org="org.richfaces.framework" name="richfaces-impl-jsf2" rev="3.3.3.Final"/> <dependency org="com.sun.facelets" name="jsf-facelets" rev="1.1.14"/> <!-- Hibernate --> <dependency org="org.hibernate" name="hibernate-core" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-c3p0" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-entitymanager" rev="3.6.0.Final"/> <dependency org="org.hibernate" name="hibernate-search" rev="3.3.0.Final"/> <dependency org="mysql" name="mysql-connector-java" rev="5.1.13"/> <!-- PrettyFaces --> <dependency org="com.ocpsoft" name="prettyfaces-jsf2" rev="3.0.1"/> <!-- SLF4J --> <dependency org="org.slf4j" name="slf4j-api" rev="1.6.1"/> <dependency org="org.slf4j" name="slf4j-log4j12" rev="1.6.1"/> <!-- XOM --> <dependency org="xom" name="xom" rev="1.2.5"/> <!-- JSF Unit --> <dependency org="org.jboss.jsfunit" name="jboss-jsfunit-core" rev="1.3.0.Final" conf="development"/> </dependencies> I am deploying to tomcat 6.0 Update After the answer below, I solved this by adding the following dependency to my ivy.xml: <dependency org="org.hibernate.javax.persistence" name="hibernate-jpa-2.0-api" rev="1.0.0.Final"/> then putting this jar above everything else under Eclipse's build order tab. I was using JRE/JDK 6.

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  • How to get the stacktrace in a mobile device?

    - by Daniel Moura
    I'm getting a NullPointerException in a Nokia S40. I want to know what is causing this exception. The device shows: NullPointerException java/lang/NullPointerException This error only occurs in the device, running in the emulator the application works fine. I use microlog to debug my application. But the application works fine if the log is enabled. Is there a way to get the stack trace when I get this NullPointerException? I don't need all details like the line number just which method cause this exception. UPDATE: I installed the same application in another Nokia S40 and the same error didn't occur. Nokia 2660 - error Nokia 6131 - no error UPDATE 2: Somehow I find what was causing the NullPointerException. import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Graphics; public class OuterClass extends Canvas { private Config config; public OuterClass() { this.config = new Config(); } public void paint(Graphics graphics) { HelperClass helper = new HelperClass(this.config); helper.doStuff(); } public void dispose() { this.config = null; } public class Config implements IConfig { public int getSomething() { // ... } } } public class HelperClass { private IConfig config; public HelperClass(IConfig) { this.config = config; } public doStuff() { config.getSomething(); // Here is thrown NullPointerException } } In some situations a thread is started and call the OuterClass.dispose() before the helper.doStuff() causing the NPE. I think when I enabled the log it made the thread slower and helper.doStuff() was called when I expected it to be called.

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  • java: List wrapper where get()/set() is allowed but add/remove is not

    - by Jason S
    I need to wrap a List<T> with some class that allows calls to set/get but does not allow add/remove calls, so that the list remains "stuck" at a fixed length. I think I have a thin wrapper class (below) that will work, but I'm not 100% positive. Did I miss anything obvious? import java.util.Collection; import java.util.Iterator; import java.util.List; import java.util.ListIterator; class RestrictedListWrapper<T> implements List<T> { static <T> T fail() throws UnsupportedOperationException { throw new UnsupportedOperationException(); } static private class IteratorWrapper<T> implements ListIterator<T> { final private ListIterator<T> iter; private IteratorWrapper(ListIterator<T> iter) { this.iter = iter; } static public <T> RestrictedListWrapper.IteratorWrapper<T> wrap(ListIterator<T> target) { return new RestrictedListWrapper.IteratorWrapper<T>(target); } @Override public void add(T e) { fail(); } @Override public boolean hasNext() { return this.iter.hasNext(); } @Override public boolean hasPrevious() { return this.iter.hasPrevious(); } @Override public T next() { return this.iter.next(); } @Override public int nextIndex() { return this.iter.nextIndex(); } @Override public T previous() { return this.iter.previous(); } @Override public int previousIndex() { return this.iter.previousIndex(); } @Override public void remove() { fail(); } @Override public void set(T e) { this.iter.set(e); } } final private List<T> list; private RestrictedListWrapper(List<T> list) { this.list = list; } static public <T> RestrictedListWrapper<T> wrap(List<T> target) { return new RestrictedListWrapper<T>(target); } @Override public boolean add(T arg0) { return fail(); } @Override public void add(int index, T element) { fail(); } @Override public boolean addAll(Collection<? extends T> arg0) { return fail(); } @Override public boolean addAll(int arg0, Collection<? extends T> arg1) { return fail(); } /** * clear() allows setting all members of the list to null */ @Override public void clear() { ListIterator<T> it = this.list.listIterator(); while (it.hasNext()) { it.set(null); it.next(); } } @Override public boolean contains(Object o) { return this.list.contains(o); } @Override public boolean containsAll(Collection<?> c) { return this.list.containsAll(c); } @Override public T get(int index) { return this.list.get(index); } @Override public int indexOf(Object o) { return this.list.indexOf(o); } @Override public boolean isEmpty() { return false; } @Override public Iterator<T> iterator() { return listIterator(); } @Override public int lastIndexOf(Object o) { return this.list.lastIndexOf(o); } @Override public ListIterator<T> listIterator() { return IteratorWrapper.wrap(this.list.listIterator()); } @Override public ListIterator<T> listIterator(int index) { return IteratorWrapper.wrap(this.list.listIterator(index)); } @Override public boolean remove(Object o) { return fail(); } @Override public T remove(int index) { fail(); return fail(); } @Override public boolean removeAll(Collection<?> c) { return fail(); } @Override public boolean retainAll(Collection<?> c) { return fail(); } @Override public T set(int index, T element) { return this.list.set(index, element); } @Override public int size() { return this.list.size(); } @Override public List<T> subList(int fromIndex, int toIndex) { return new RestrictedListWrapper<T>(this.list.subList(fromIndex, toIndex)); } @Override public Object[] toArray() { return this.list.toArray(); } @Override public <T> T[] toArray(T[] a) { return this.list.toArray(a); } }

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  • Trying to understand Java Classloading

    - by Jens
    Hello, I'm currently getting to know Java and OSGi, so I've read a few books. In one particular book the class loading is described. You can download it (free and legal) from the authors page (Neil Bartlett): OSGi Book On page 9 and 10 are this pictures: It seems like there is the possibility that our class "Foo" won't use the class "Bar" of foobar.jar, but instead class "Bar" from naughty.jar. Because of the flat and global structure of the Java classpath this could be, but as far as I know you would define a package from where you want to import a certain class: import foobar.Bar This should prevent loading the wrong class, shouldn't it? Of course assuming that the package is called "foobar".

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  • Clob as param for PL/SQL Java Stored Procedure

    - by JDS
    I have a java stored procedure that takes in a clob representing a chunk of javascript and mins it. The structure of the function calling the JSP is as follows: function MIN_JS(pcl_js in clob) return clob as language java name 'JSMin.min(oracle.sql.CLOB) return oracle.sql.CLOB'; In the actual JSP, I have the following: import oracle.sql.CLOB; public class JSMin { ... public static min(CLOB js) { ... } The problem I'm having is that whenever I pass a clob to JS_MIN, it is always interpreted as null inside the JSP. I've checked the clob before calling JS_MIN annd it definitely has contents. Any ideas as to what I'm missing? Any help is greatly appreciated.

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  • Java :moving ball with angle ?

    - by Meko
    Hi all.I am started to learn game physics and I am trying to move ball with an angle.But it does not change its angle .Java coordinate sydstem is a little different and i think my problem is there.Here my codes this is for calculating x and y speed scale_X= Math.sin(angle); scale_Y=Math.cos(angle); velosity_X=(speed*scale_X); velosity_Y=(speed*scale_Y); This is for moving ball in run() function ball.posX =ball.posX+(int)velosity_X; ball.posY=ball.posY+(int)velosity_Y; I used (int)velosity_X and (int)velosity_Y because in ball class I draw object g.drawOval(posX, posX, width, height); and here g.drawOval requares int.I dont know is it problem or not. Also if I use angle 30 it goes +X and +Y but if I use angle 35 it goes -X and -Y. I didnot figure out how work coordinate system on java.

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  • Fail to profile remote java app using TPTP

    - by rperez
    Hi all, I am trying to profile CPU usage using TPTP. Application to profile run on Linux RH AS5. I installed and configured Agent Controller like described here I ran the java application using the command java '-agentlib:JPIBootLoader=JPIAgent:server=standalone,file=log.trcxml;CGProf' MyApp The monitoring station is All-In-one TPTP version 4.6.2. I followed the stepes described here on Eclipse - on the "Profile Configuration" I choose a new configuration for "Attach to Agent", set the host to my remote linux machine where MyApp is running, test connection succeed and when I get to the "Agents" tab, I see "Pending...", a background process "Feching children for host" is running and can't find anything which makes it impossible to profile. Any idea?

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  • Trying to cause java.lang.OutOfMemoryException

    - by portoalet
    Hi, I am trying to reproduce java.lang.OutOfMemoryException in Jboss4, which one of our client got, presumably by running the J2EE applications over days/weeks. I am trying to find a way for the webapp to spitout java.lang.OutOfMemoryException in a matter of minutes (instead of days/weeks). One thing come into mind is to write a selenium script and has the script bombards the webapps. One other thing that we can do is to reduce JVM heap size, but we would prefer not to do this, as we want to see the limit of our system. Any suggestions? ps: I don't have access to the source code.

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  • XML parse node value as string

    - by bharathi
    My xml file is look like this . I want to get the value node text content as like this . <property regex=".*" xpath=".*"> <value> 127.0.0.1 </value> <property regex=".*" xpath=".*"> <value> val <![CDATA[ <Valve className="org.tomcat.AccessLogValve" exclude="PASSWORD,pwd,pWord,ticket" enabled="true" serviceName="zohocrm" logDir="../logs" fileName="access" format="URI,&quot;PARAM&quot;,&quot;REFERRER&quot;,TIME_TAKEN,BYTES_OUT,STATUS,TIMESTAMP,METHOD,SESSION_ID,REMOTE_IP,&quot;INTERNAL_IP&quot;,&quot;USER_AGENT&quot;,PROTOCOL,SERVER_NAME,SERVER_PORT,BYTES_IN,ZUID,TICKET_DIGEST,THREAD_ID,REQ_ID"/> ]]> test </value> </property> I want to get text as order they specified in a file . Here is my java code . Document doc = parseDocument("properties.xml"); NodeList properties = doc.getElementsByTagName("property"); for( int i = 0 , len = properties.getLength() ; i < len ; i++) { Element property = (Element)properties.item(i); //How can i proceed further . } Output Expected : Node 1 : 127.0.0.1 Node 2 : val <Valve className="org.tomcat.AccessLogValve" exclude="PASSWORD,pwd,pWord,ticket" enabled="true" serviceName="zohocrm" logDir="../logs" fileName="access" format="URI,&quot;PARAM&quot;,&quot;REFERRER&quot;,TIME_TAKEN,BYTES_OUT,STATUS,TIMESTAMP,METHOD,SESSION_ID,REMOTE_IP,&quot;INTERNAL_IP&quot;,&quot;USER_AGENT&quot;,PROTOCOL,SERVER_NAME,SERVER_PORT,BYTES_IN,ZUID,TICKET_DIGEST,THREAD_ID,REQ_ID"/> test Please suggest your views .

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