Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.
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Hi, we are trying to switch from embedded mode to client-server to support database clustering, and we are now facing following issue. Object DB server is creating too many sockets. Currently the ObjectDB Server process has 3895 opened files, and from that number 3823 are opened sockets. I
Hi, do you know is this error an objectDB bug 2017-01-25 20:26:19,978 SEVERE [com.vaadin.server ... ) [classes:] at com.vaadin.ui.UI.doInit(UI.java:682) [vaadin-server-7.6.6.jar:7.6.6] at com.vaadin.server.communication.UIInitHandler.getBrowserDetailsUI(UIInitHandler.java:214) [vaadin-server-7.6.6
to interact with a relational database such as Oracle, DB2, SQL Server or MySQL. The popular JPA
objectdb-2.6.9_06: Extended Persistence Context fails: 'Attempt to begin a new transaction when a transaction is active'
.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:352) at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:500) at com.sun.enterprise.v3.server ... .onMissingResource(AdminAdapter.java:224) at org.glassfish.grizzly.http.server.StaticHttpHandlerBase.service
This is the NetBeans version of the JPA Web App tutorial. It demonstrates how to create and run a database driven Java web application in NetBeans - using Tomcat 6 Apache Tomcat Server 6.0 (some modifications are needed for Tomcat 7.0), ObjectDB and JPA. The demo web application manages a basic
the application server into the guestDao field automatically (since the field is marked with the @EJB
. The database will be closed when the web application stops (or when the web server shuts down), by
a server to dynamically bind to an instance from this factory associated with the thread's current ... setting. Since: JDO 1.0 String getServerTimeZoneID() Gets the TimeZone ID of the server associated with this PersistenceManagerFactory. Gets the TimeZone ID of the server associated
by the server. Get the Date as seen by the server. Clients using this method can order their operations according to a single time source. Implementations use the setting of the server time zone to prepare a Date instance that represents UTC time on the server. Returns: a Date instance corresponding
Date getServerDate() Get the Date as seen by the server. Get the Date as seen by the server. Clients ... the setting of the server time zone to prepare a Date instance that represents UTC time on the server. Returns: a Date instance corresponding to the UTC Date as seen by the server Since: JDO 2.1 Object