java-ee

问题 Regarding a Java EE application and WebLogic; I've noticed that I could change the Java VM (Sun JDK or JRockit) in different places: During creation of the WebLogic Domain Project classpath During creation of WebLogic Server Runtime Environment Other? Can you explain me what happens if I change one of the different settings? 回答1: The only real difference is that JRockit is specifically tuned to work with Weblogic so you'll see performance improvements. Memory settings will change when picking

问题 Which version of Hibernate can I use with Java EE 5? Can I use the latest version? 回答1: See http://www.hibernate.org/, it says that newest 4.1.4 version can be used with Java EE 5. 回答2: Any. Neither JPA nor Hibernate restrict your choice of application server. They are independent. 来源： https://stackoverflow.com/questions/11441785/java-ee-5-and-hibernate

问题 I am trying to define a startup class for my application in Weld CDI with @Singleton and @Startup annotations (running on tomcat 7), but my PostConstruct method is never called. Here is my Startup class: import java.util.List; import java.util.logging.Logger; import javax.annotation.PostConstruct; import javax.ejb.Startup; import javax.inject.Inject; import javax.ejb.Singleton; import javax.persistence.EntityManager; import se.raindance.squid.core.domain.SquidSettings; @Singleton @Startup

问题 I need to detect information about the Application Server my EJBs are running in. The System.properties contain a lot of information about Java and the Operating system, but I need to know what type of application server and if possible even the version. Is there a way to get this information in an application independent way (JMX maybe) ? Alternatively, is there a WebSphere specific way of getting this information ? 回答1: Take a look through the WAS MBeans that are available. It looks like

问题 I am experiencing problems with my app since I migrated web.xml from Java-EE-5 to Java-EE-6. Here is the stacktrace I get when I deploy my app: 24 août 2011 14:10:45 org.apache.catalina.startup.HostConfig deployDescriptor GRAVE: Erreur lors du déploiement du descripteur de configuration ROOT.xml java.lang.IllegalAccessError: class javax.xml.parsers.SecuritySupport12 cannot access its superclass javax.xml.parsers.SecuritySupport at java.lang.ClassLoader.defineClass1(Native Method) at java.lang

问题 I'm just asking theoretical question. I' have an operation which takes some period of time which is performed in some Servlet doGet/doPost method or inside of Spring MVC controller . is is good idea to open new background thread an perform it there? Won't it cause performance issue? Would I get some befits if I were using jBoss JMS system in this case? 回答1: It's OK (Tomcat is not a JavaEE container). Since you mention Spring MVC, I will suggest using @Async on the method you want to execute -

问题 Let me tell the story first: We have 2 j2ee web applications AAA and BBB, and we want to put them in the same server. Right now they both have the logback.xml in their class path, which is in /src/main/resources for the maven project. We want to put all the configuration files in a directory, such as ${app_home}, and let the web applications to find their configuration files by themselves. Like we put AAA_logback.xml and BBB_logback.xml into ${app_home}, and let the web application to find

问题 I am trying to build an EJB in an EAR. My EJB has dependencies on SNAPSHOTS. So when I build the EAR my structure looks like this: my-ear-1.0.0-SNAPSHOT.ear + META-INF - application.xml - MANIFEST.MF - my-ejb-1.0.0-SNAPSHOT.jar - third-party-lib-1.0.0-SNAPSHOT.jar However, when using the maven-ejb-plugin to generate its MANIFEST.MF: <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-ejb-plugin</artifactId> <version>2.3</version> <configuration> <archive> <manifest>

问题 I am using Weblogic Server 12.1.1 and copied some JARs to my domain's lib folder. One of the JARs is a org.apache.commons.io jar. Now I have the problem that Weblogic itself comes with a different version of commons-io in its system classpath and so I get NoSuchMethodErrors . Is there any way to configure Weblogic to prefer the libs from domain over those from Weblogic system? The Filtering Classloader works only on those JARs provided with the application ( WEB-INF/lib ). 回答1: If you need to

问题 I read this C# Object Pooling Pattern implementation so my question: does one have to implement own Object Pooling strategy in ASP.NET whereas this exists in Java EE? Well I'm upset as I prefer .net platform to java, but here in java it's done without being a guru. I'm surprised ASP.NET didn't implement at least the same and even better. 回答1: Recently I've learned that .NET covers this for atleast some scenarios. BufferManager Class Is an object pool for buffers. I don't see any readily