About Application Server

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FAQ
13

What is the Java Persistence API (JPA)?

applications. The main advantage of JPA over JDBC (the older Java API for interacting with databases ... to interact with a relational database such as Oracle, DB2, SQL Server or MySQL. The popular JPA ... the relational database (as tables and records) and the representation in the Java application (as classes
Forum
13

Server vs embedded mode in multi-instance scenario

have a user base of about 2,000 to 60,000 users that could possibly be using their application at any given ... concerns as well as auto scale during peak usage, at least for the benefit of our web application ... there will only be one active instance of the app, use embedded mode inside the web application
Issue
13

Server out of memory exceptions

I've started to get memory exceptions on objectdb instances running as a server. The objectdb log reports this as: [2011-07-29 23:28:41 #20 server] java.lang.OutOfMemoryError: Java heap space [2011-07-29 23:28:41 #21 server] java.lang.OutOfMemoryError: Java heap space at java.net
Forum
13

Client server mode no longer works after JRE install

Hi I had client server mode working with no problems with my application. Then suddenly I ... java from the machine and included a jdk in my application there were no problems, client server mode ... is being started from a java application. So how do I do >server -b -client? Hi. I fumbled around with batch files
Forum
12

Connecting to a remote objectdb server

I am trying to configure my application in a client-server objectdb setup via tcp/ip. So I first made sure that the remote objectdb server is running using telnet from my local.  $ telnet db.mydomain.com 6136 (worked fine, is able to connect...) My db was configured below: <server>
JDO Doc
12

javax.jdo.JDOEntityManager

the PersistenceManager at transaction completion. This method allows the application to explicitly provide a hint ... specific. The unwrap method is to be preferred for new applications. Returns: underlying provider ... getTransactionalObjectId, or might have been constructed by the application. If the PersistenceManager is unable
Forum
12

Convert embedded database to server

data directory, start the server, and access the database from your application using a client ...   The benefit of the embedded-server mode is of course better performance of the main application ... Hello, What is the right way to convert an embedded database to a server one ? As a result
Forum
12

ObjectDb Supports Clustering of Servers?

Hi,     I am new to ObjectDb. we have a scenario where we deploy the same application in more than one linux (Jobss) servers. In this case user request can go to any server depends on the availability of the servers (This is for load balancing ). As of now we are using Oracle + Hibernate + JPA , as
Forum
12

Mismatch client-server protocol prefix

.JpaSystemException: com.objectdb.o.UserException: Mismatch client-server protocol prefix; nested exception is javax.persistence.PersistenceException: com.objectdb.o.UserException: Mismatch client-server protocol prefix] with root cause com.objectdb.o.UserException: Mismatch client-server protocol
Forum
12

Server connection management

to the application. Replication (introduced in ObjectDB 2.1) enables also specifying replicated servers ... The server does not appear to release broken connections. My typical development pattern ... tomcat. After a few days of this, the server stops responding, and I see the following in the server logs