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  • Project Performance Evaluation and Finding Weak Areas

    - by pramodc84
    I'm working in J2EE web project, which has lots of Java, SQL scripts, JS, AJAX stuff. Its been 5 years for project still running fine. I have assigned with work of performance evaluation on the project as there might be some memory usage issues, DB fetching logic delays and other similar weak performance areas. From where should I begin? Any best practices to make project better?

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  • How to build software that doesn't require a framework on the user's machine?

    - by Flint
    I am an ASP.NET developer, but now I want to build a software that can be installed on my PC. Software built in .NET platform only works when the .NET Framework is installed, and software written in Java only works if the JDK is installed. When I install programs like Firefox, uTorrent, etc., I don't need to have any frameworks (.NET, JDK, etc.) installed. How do I write software that doesn't depend on a framework?

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  • How do i know if this is random enough?

    - by David
    I wrote a program in java that rolls a die and records the total number of times each value 1-6 is rolled. I rolled 6 Million times. Here's the distribution: #of 0's: 0 #of 1's: 1000068 #of 2's: 999375 #of 3's: 999525 #of 4's: 1001486 #of 5's: 1000059 #of 6's: 999487 (0 wasn't an option.) Is this distribution consistant with random dice rolls? What objective statistical tests might confirm that the dice rolls are indeed random enough?

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  • android : sax Xml parsing

    - by Ram
    Team, I am facing some issue at the time of parsing the XML, but the same works in Java program... When I run the same code through android prgming its failing to parse... InputStream byteArrayInputStream = new ByteArrayInputStream( response.toString().getBytes()); SAXParser parser = SAXParserFactory.newInstance().newSAXParser(); parser.parse(byteArrayInputStream, xmlHandler); Facing the following error DTD handlers aren't supported Any help is greatly appreciated. Thanks, Ramesh

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  • How to make Android not to recycle my Bitmap until I don't need it?

    - by RankoR
    I'm getting drawing cache of the view, that is set as contentView to the Activity. Then I set new content view to the activity and pass that drawing cache to it. But Android recycles my bitmaps and I'm getting this exception: 06-13 01:58:04.132: E/AndroidRuntime(15106): java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@40e72dd8 Any way to fix it? I had an idea to extend Bitmap class, but it's final. Why GC is recycling it?

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  • Best C# Corba / IIOP framework

    - by krs43
    I am looking to connect to the CBOE, which provides a Corba / IIOP interface. There are many professional libraries for Java/C++, but I cannot find any for C#. What is the best library for corba in C#? (I have looked at IIOP.Net... it's an option, but it hasn't been updated in years, prefer a more maintained or professional library)

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  • Learning... anything really

    - by WebDevHobo
    I'm particularly interested in Windows PowerShell, but here's a somewhat more general complaint: When asking for help on learning something new, be it a small subject on PHP or understanding a class in Java, what usually happens is that people direct me towards the documentation pages. What I'm looking for is somewhat of a course. A deep explanation of why something works the way it does. I know my basic programming, like Java and C#. I've never seen C or C++, though I have seen a bit of assembler. I know what the Stack and Heap are, how boxing and unboxing works, why you have to deep-copy an array instead of copying the pointer and some other things. Windows PowerShell on the other hand, I know nothing about. And I notice that when reading the small document or some code, I usually forget what it does or why it works. What I am looking for is preferably, a nice tutorial that explains the beginnings, the concepts, and goes to more difficult things at a steady pace. The only thing documentation can do is explain what a function does. That's no good to me since I don't know what I want to do yet. I could read about a thousand functions, and forget about most of them, because I don't need to implement them right after it. Randomly wandering through the documentation doesn't do me any good. So conclude, what is a good tutorial on Windows Powershell? One which explains in clear language what is happening, one which builds on previous things learned. I don't think googling this is a good idea. Doing a Google search on this would turn up numerous tutorials. And experience tells me that you have to look long and hard to find the gem you're looking for. That's why I'm asking here. Because this is the place where you can find more experienced people. Many of the PowerShell guys among you will know the good ones already, and by asking you, I avoid wasting time that could be spent learning. So to summarize: I will not google this!

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  • project hierarchy

    - by Noona
    Is there a difference between a package and a folder in eclipse? for example, if I have this hierarchy requirement: java –classpath C:\ChatCompany\BackendChatServer\ -Djava.security.policy=c:\HW2\permissions.policy hw2.chat.backend.main.ChatBackendServer when the package's name is: "hw2.chat.backend.main" and "ChatCompany\BackendChatServer\" is the folder name, then how can I make this separation between a package and a folder in eclipse, so that I can write "package hw2.chat.backend.main" and not "package ChatCompany.BackendChatServer.hw2.chat.backend.main"? thanks

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  • GWT-RPC vs HTTP Call - which is better??

    - by Nirmal Patel
    I am evaluating if there is a performance variation between calls made using GWT-RPC and HTTP Call. My appln services are hosted as Java servlets and I am currently using HTTPProxy connections to fetch data from them. I am looking to convert them to GWT-RPC calls if that brings in performance improvement. I would like to know about pros/cons of each... Also any suggestions on tools to measure performance of Async calls...

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  • No unique bean of type [javax.persistence.EntityManager] is defined

    - by sebajb
    I am using JUnit 4 to test Dao Access with Spring (annotations) and JPA (hibernate). The datasource is configured through JNDI(Weblogic) with an ORacle(Backend). This persistence is configured with just the name and a RESOURCE_LOCAL transaction-type The application context file contains notations for annotations, JPA config, transactions, and default package and configuration for annotation detection. I am using Junit4 like so: ApplicationContext <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="persistenceUnitName" value="workRequest"/> <property name="dataSource" ref="dataSource" /> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="databasePlatform" value="${database.target}"/> <property name="showSql" value="${database.showSql}" /> <property name="generateDdl" value="${database.generateDdl}" /> </bean> </property> </bean> <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName"> <value>workRequest</value> </property> <property name="jndiEnvironment"> <props> <prop key="java.naming.factory.initial">weblogic.jndi.WLInitialContextFactory</prop> <prop key="java.naming.provider.url">t3://localhost:7001</prop> </props> </property> </bean> <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/> <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> JUnit TestCase @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "classpath:applicationContext.xml" }) public class AssignmentDaoTest { private AssignmentDao assignmentDao; @Test public void readAll() { assertNotNull("assignmentDao cannot be null", assignmentDao); List assignments = assignmentDao.findAll(); assertNotNull("There are no assignments yet", assignments); } } regardless of what changes I make I get: No unique bean of type [javax.persistence.EntityManager] is defined Any hint on what this could be. I am running the tests inside eclipse.

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  • Saving order of a List in JPA

    - by Rosen Martev
    Hello, I have the following question about JPA: Can I save the order of the elements in a java.util.List? In my application the order in which I put elements in the Lists is important but after I get those collections from the database the order is not the same (as expected). Can you show me a way to deal with this problem? P.S. There is not a field in the entities that I put in the collections by which I can order them. Rosen

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  • C++ library for making Jax WS calls

    - by Harsha Reddy
    Hi all, I want to know if there are any C++ libraries which allow me to make JAX WS calls for a web service to a server. (Mainly the SOAP message part - the serialization and de-serialization of SOAP message.) My web service is in java but i need to invoke it using c++. Thanks, Harsha

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  • Is it possible to generate a XSL-FO template from a PDF?

    - by Vihung
    Given a PDF document, is it possible to generate a XSL-FO (FOP) template? Obviously, this would be a one-time thing - the generated template would just be a starting point for creating a proper template that pulls in the appropriate data. For me, the ideal tool for doing so would be a Java-based one and should be executable from the command line or through an ANT task. Failing that, it would be something that runs on Linux and MacOS X.

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  • Which language should I learn?

    - by Alex
    I am already pretty good at PHP and now want to expand my knowledge to desktop programming.. which language would be: The one's I'm mainly looking into are: Java, C#, C++, Python 1) Easier to learn? 2) Most suitable for Making 3D games and applications with sockets? One more thing - Although I'm looking to code for Windows, I may also want to do a bit of programming for Mac OS after a while.

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  • Production debugging: Is there a less intrusive way than WinDbg?

    - by Alex
    Hi, I was wondering if there is a less intrusive way to analyze a running, managed process in production environments. Less intrusive meaning: No delay of execution when attaching the debugger. No delay of execution when getting basic stats like running threads. In the Java world there is a such a tool part of the JDK. I was wondering if there're similar tools in the .NET world. Any ideas? Alex

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  • What is the funniest bug you've ever experienced?

    - by friol
    I remember testing a geographical data normalizer written in Java that had concurrency problems. So, when you tried to normalize a city (say "Rome") and another guy did that too (say "New york"), you would get the other guy's data normalized ("NEW YORK") instead of your query. What's the bug that mostly made you smile in your career?

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  • Implementing Object Oriented: ansi-C approach

    - by No Money
    Hey there, I am an Intermediate programmer in Java and know some of the basics in C++. I recently started to scam over "C language" [please note that i emphasized on C language and want to stick with C as i found it to be a perfect tool, so no need for suggestions focusing on why should i move back to C++ or Java or any other crappy language (e.g: C#)]. Moving on, I code an Object Oriented approach in C but kindda scramble with the pointers part. Please understand that I am just a noob trying to extend my knowledge beyond what i learned in High School. Here is my code..... #include <stdio.h> typedef struct per{ int privateint; char *privateString; struct per (*New) (); void (*deleteperOBJ) (struct t_person *); void (*setperNumber) ((struct*) t_person,int); void (*setperString) ((struct*) t_person,char *); void (*dumpperState) ((struct*) t_person); }t_person; void setperNumber(t_person *const per,int num){ if(per==NULL) return; per->privateint=num; } void setperString(t_person *const per,char *string){ if(per==NULL) return; per->privateString=string; } void dumpperState(t_person *const per){ if(per==NULL) return; printf("value of private int==%d\n", per->privateint); printf("value of private string==%s\n", per->privateString); } void deleteperOBJ(struct t_person *const per){ free((void*)t_person->per); t_person ->per = NULL; } main(){ t_person *const per = (struct*) malloc(sizeof(t_person)); per = t_person -> struct per -> New(); per -> setperNumber (t_person *per, 123); per -> setperString(t_person *per, "No money"); dumpperState(t_person *per); deleteperOBJ(t_person *per); } Just to warn you, this program has several errors and since I am a beginner I couldn't help except to post this thread as a question. I am looking forward for assistance. Thanks in advance.

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  • Parse (extract) DTMF in Python

    - by Joseph
    If I have a recorded audio file (MP3), is there any way to get the figure out the DTMF tones that were recorded in pure Python? (If pure python is not available, then Java is okay too. The point being that it should be able to run in Google Appengine)

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  • SharePoint Error - Datasheet View refuses to show up!

    - by Marius
    Hi, Recently the DataSheet view of my list refuses to dispaly. I tried numerouse times and with no luck. Other lists works just fine, except for this one. there is a Java error message on the left bottom corner of the screen that disapears in 2 seconds, then it renders the list in Standard view any time you try it. I even created a new Datasheet View - the result a Standard View. Any suggestions? Thanks,

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  • C++ superclass constructor calling rules

    - by levik
    What are the C++ rules for calling the superclass constructor from a subclass one?? For example I know in Java, you must do it as the first line of the subclass constructor (and if you don't an implicit call to a no-arg super constructor is assumed - giving you a compile error if that's missing).

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  • Recommendations for Open Source Parallel programming IDE

    - by Andrew Bolster
    What are the best IDE's / IDE plugins / Tools, etc for programming with CUDA / MPI etc? I've been working in these frameworks for a short while but feel like the IDE could be doing more heavy lifting in terms of scaling and job processing interactions. (I usually use Eclipse or Netbeans, and usually in C/C++ with occasional Java, and its a vague question but I can't think of any more specific way to put it)

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