comp.lang.programmer

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Out of memory problem

We have some java applications deployed on tomcat. From time to time the whole system freezes up. It seems that there is not enough space for JVM. The maximum is set to 896MB. Instead of just increasing the size I'd like to know whats causing the problem. I'm trying to use "-XX:-PrintClassHistogram" parameter but the log file is not generated. I put this to tomcat5 config file: JAVA_OPTS="-Xms512m -Xmx896m -XX:MaxPermSize=256m -XX:HeapDumpPath=/tmp/java_pid<pid>.hprof -XX:-HeapDumpOnOutOfMemoryError -XX:-PrintClassHistogram" I tried stoping the tomcat afterwords or

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define a set of constant

Hi I would like to define a set of constants and these constant will be used as the input of the method. public Interface MesgConst { public final static String str1="This is string 1"; public final static String str2="This is string 2"; } The following is the method public void method(MesgConst _val) { } The usage of the constant, obj.method(MesgConst.str1) The point for doing this is to limit the options for the user to input when calling the method. It is very similiar to HasHorizontalAlignment and HasHorizontalAlignment.HorizontalAlignment, but I dont und

Firewall for Java?

Hi guys, is there a possibility for firewalls to control the traffic of different java applications? I mean, some Java Applications are even meant to run as a system service in the background - quite a reason to worry about! As far as I know, the rules of common firewalls are based on the java virtual machine executable. So is there a possibility to handle different instances of a java virtual machine or - the much better solution - identify the running java application within the java vm to assign a java application based firewall rule? Ina consistent way, of course... Tha

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reg expression example...

Hi All, I need to process large text file and I'm using this expression. All I know that these words are coming in this order. "word1.*word2(.*)word3.*word4.*word5" How can I optimize it ? thanks.

Program for displaying movies, pictures...

I would like to write standlone program for displaying movies (different formats), pictures (jpg, png, etc. ) and htmls. Could you help me to choose: - technology (C++, .Net, Java) - external applications - libraries which will cooperate very well. Basic requirements: - content displaying according to xml playlist - program has to work under system Windows XP - reliability (high as it is possible) May somebody saw such ready made program in network? Thanks in advance. Bartek

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ftp ssl cert

I need to write a ftp/ssl program (done actually) but I need to secure it, and I was provided 2 files from the destination (keycert.txt & trusted.txt). The keycert.txt has the following in it: -----BEGIN ENCRYPTED PRIVATE KEY----- MII ...snip... -----END ENCRYPTED PRIVATE KEY----- -----BEGIN CERTIFICATE----- MII ...snip... -----END CERTIFICATE----- The trusted.txt has the following in it: -----BEGIN CERTIFICATE----- MII ...snip... -----END CERTIFICATE-----= Notice the MII in the certificate/key areas. I suspect that it is RSA. I guess I'm supposed to import these into a ke

Call from native thread is not handled by context class loader

Hello. I have scenario like this: Call from JAVA->c++ >JAVA When I call JAVA defined oeprations (kind of call back) from C++ app(called by java) immediately after receiving the call from JAVA, it works fine. C++ call from JAVA initiates a chain/ stack of subsequent calls (which may spawn a new process/ thread), and finally a call is again made from last spwned process/ thread to JAVA. When we call findClass on env. after attaching current thread to JVM, env is not able to find the class. As per my understanding this is probably because when we call from native thread to JAVA,

creating identical zip archives with java and zip tools

Hi, a simple problem: we have JavaEE based server that accepts ZIP files, and a JavaEE based client that creates and uploads them. We verify that the ZIP file is identical at client and server by MD5. I'd like to write a client with some other language.. in fact even a shell/wget script would do. But here's the problem: if I create a ZIP archive with java.util.zip, it is not the identical to an archive created by command line tools. Here's a simple example: cat hello.txt hello zip hello1.zip hello.txt java makezip [creates hello2.zip, code below] ls -l hello1.zip hello2.zip

Any Java books aimed at the Android platform?

(or Android books aimed at the Java illiterate?) Hello there, I need some suggestions on a good book about Java programming on the Android platform. All books I have seen on various shops fall into two categories: 1- Java generic books that will teach everything about the language, typically in a PC/Web environment. 2- Android books that will assume you're a fluent Java programmer. The former category isn't for me. Ok, let's just say I'm one of those Java haters who would use it under Android only because he's forced to (no flames please, they would go to /dev/null anyway). T

ODE bindings for java

Hi, I transfered a small subset of the ODE (Open Dynamics Engine) functions to java. It should be easy to extend. When my applet is finished, I will publish it as an example for these bindings. http://tokis-edv- service.de/index.php?option=com_content&view=article&id=68%3Aode-bindings- for-java&catid=44%3Aspiele&Itemid=84&lang=en Best Regards Thorsten

netbeans and jmatter

I have a problem with Jmatter and Netbeans: how can I use Jmatter on Netbeans? I googled this but nobody has this problem.

JAX-WS and RuntimeException in service implementation

Hello, I am confused with regard to the treatment of runtime exceptions in a webservice call. Can anyone give an explanation (or point me to one) that is clearer and more complete than the JAX-WS spec itself? The scenario: Supppose I call a webservice in Java over a JAX-WS 2.1 compliant SOAP implementation and the service implementation throws a java.lang.RuntimeException. What happens on the service and the client side? What the spec has to say: The JAX-WS spec says in section 3.7 : java.lang.RuntimeException and java.rmi.RemoteException and their subcl

Command Pattern Question

Hello, I have a basic question about the command pattern. Let's assume there is a command AddItemCommand and another one RemoveItemCommand. The implementation of execute() in the AddItemCommand is basically the impl. of undo() in the RemoveItem command and vice versa. If this is the case. How can code duplication be avoided using the command pattern? Probably I missed something general with with command pattern. Thanks for your help. Peter

How is the search path for "log4j.properties" file?

Assume a java program declares and uses a log4j logger. How is the search path for the responsible log4j.properties file resp. how is the priority if multiple log4j.properties files exist? I can think of different levels: log4j.properties file in the directory where the calling *.class/*.jar is placed log4j.properties file in the directory where the log4j.jar is placed log4j.properties file in the directory where the java.exe is placed log4j.properties file in a special config directory (of the appserver) log4j.properties file in the directory on the PATH environment variable

Struts 2 with Weblogic 10

I'm trying to use Struts2 with Bea WebLogic10. I imported in Eclipse the example-application struts2- blank-2.0.14.war included in the struts2-2.0.14-all.zip downloaded by Apache site. The server starts correctly but when I try to enter by browser I have this: javax.servlet.ServletException: java.lang.NoClassDefFoundError: freemarker/template/Template (The freemarker.2.3.8.jar is in Web-Inf/lib) I don't know what can be... Do You have any ideas??? Thanks a lot Giulio

Java and Android

Does Java run on Android? I know that Android code contains a lot of Java code, but how easy is it to port Java apps that are already written to Android? Anyone done it? -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.blogtalkradio.com/onetribe - Occult Talk Show

Bugzilla or other Project Management tool

Hi Everybody, I am looking for a project management tool. Mostly what I need to do is tie together requirements, test scripts for one-off type requests and then organize those requests into a hierarchy and then be able to generate reports, e.g. this is what we worked on last week, last month, last year, etc., here are the projects we had an impact on, and here are the individual tasks that we performed (it would also be nice to have things like a way to enter how much time each task took and a way to be able to press a button and get a requirements document or test script for a giv

Code changes not reflecting on server

Hi I wonder why the code changes in my web app are not getting reflected on the server automatically. Is it that, I have to re-publish the application after making every small piece of change? I am using Eclipse and Weblogic 9.2 Please Advice. Thanks Sahil

ant keeps compiling

Hi, I have about 200 files in my source tree. I compile by ant: <target name="source" depends="init" description="compile the source " > <javac srcdir="${src}" destdir="${build}" debug="on" includeantruntime="false"> <classpath> <fileset dir="${home}/code/lib" includes="*.jar"/> <fileset dir="${home}/tomcat/lib" includes="*.jar"/> </classpath> <!-- <compilerarg line="-Xlint:unchecked"/> --> </javac> </target> Even if I do "ant" consecutively, I get source: [javac] Compiling 1 source file to C:\pg\code\bak\Pr