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A connection to a database is represented by an EntityManager instance, which also provides ... connections during their lifetime. For instance, in a web application it is common to establish a separate database connection , using a separate EntityManager instance, for every HTTP request. The main role

In JPA a database connection is represented by the EntityManager interface. Therefore, in order ... : EntityManager em = emf. createEntityManager (); The EntityManager instance represents a connection ... while at the same time sharing a single application-wide EntityManagerFactory . When the connection

specifies how clients can connect to the server: The port attribute specifies a TPC port on which the server is listening for new connections . Usually the default port 6136 should be specified. If another port is specified it also has to be specified by clients in the URL connection string

the shell file, setting the paths to the objectdb.jar file and to the JVM). Connecting to the Database Opening a Database Connection To open a local database file in embedded mode use the  File Open ... select File Open C/S Connection ...  and provide host, port, username and password for a client

The server does not appear to release broken connections . My typical development pattern ... logs: [odb:server:fatal] com.objectdb.o.UserException: Too many open connections (100) at com.objectdb ... setting that would tell the server to close connections after a period of inactivity. Also, how does

The PersistenceManagerFactory interface represents a factory of database connections . Its main ... connection . Every operation on a database requires a PersistenceManager instance. The Transaction ... database connections during their lifetime. For instance, in a web application it is very common

how do you handle connection pooling?  I don't understand how to open and close connection ... ; The element specifies how clients can connect to the server:     The port attribute specifies a TPC port on which the server is listening for new connections . Usually the default port 6136

down and database lost connection with the JBOSS AS, several restarts got it up and running finally.  It seems when the database loses network connection it shutdowns but we cant be sure. Usualy database stops once a day with no apperent reason. Second cause we suspect is the number of network connections

Upon initializing our ObjectDB database on a node that does not have a connection to the outside ... .UnknownHostException: java.sun.com at java.net.PlainSocketImpl. connect (Unknown Source) at java.net.SocksSocketImpl. connect (Unknown Source) at java.net.Socket. connect (Unknown Source) at java.net.Socket. connect

with multiple foreign keys. Indeed, it returns the following error: Failed to connect to server 35.181.88.206:6136 ( connect timed out) (error 522) at com.objectdb.jpa.EMF.createEntityManager(EMF.java:152 ... .main(RemoteTestRunner.java:206) Caused by: com.objectdb.o.UserException: Failed to connect to server 35

I am having trouble setting up the birt points.odb sample with a client/server connection . I can connect to points.odb with the explorer.  I added a "Data Source" that works fine with local file.  The connection using the server url fails the ping test.  I get (Failed to connect

.mydomain.com 6136 (worked fine, is able to connect ...) My db was configured below: On my application ... With all these configuration, I am still not able to connect on remote server. I am pretty sure that defaultObjectDBPersistenceUnit was used on my app. Also, if my app was able to connect

Hello, i am trying to set up the SSL for connections to objectDB server. I cannot connect the Client, when SSL is enabled. I can connect from Explorer, when "Use SSL" is checked, isn't there some ... .objectdb.o.CST.o(CST.java:150) thamal Tomas Hamal I can connect from Explorer, when "Use SSL" is checked

after an undetermined period. Caused by: com.objectdb.o.UserException: Connection is closed at com ... out of connections ? Or is there something obvious that I am not seeing? I am using objectdb-2.2.6_03   ... what is written there... com.objectdb.o.UserException: Too many open connections (100) at com.objectdb.o

sure about the connection url for the code, and for the explorer. I tried this: Transactor.emf ... .odb created under db-files/ nor can I connect to it from explorer. So, how does one set up odb as a server, and how does one connect to it from code, and from explorer? dmoshal David Moshal

Hi! Does ObjectDB keeps and reuses a pool of connections as MySQL JDBC driver does? I mean ... . Every EntityManagerFactory instance manages a pool of connections and reuses them when it creates new EntityManager instances. By default the maximum connection pool size is 50. You can change it in

. Exception in thread "main" [ObjectDB 2.2.7_08] javax.persistence.PersistenceException Connection is closed ... .java:308) Caused by: com.objectdb.o.UserException: Connection is closed at com.objectdb.o.MSG.d(MSG ... .PersistenceException Connection is closed (error 526) at com.objectdb.jpa.JpaQuery.getResultList(JpaQuery

I've got a master/slave cluster set up with just a master and a slave.  I can connect to the master with a client app no problem.  My slave can connect to the master and replicate no problem.  But when I use a client app to connect to the slave like this: objectdb://slaveserverurl

It is easy to change the properties in persistence.xml file to connect to an ObjectDB server ... the client-server connection url with an embedded connection url, e.g. an absolute file path. See this documentation section regarding client-server and embedded connection urls. support Support

.objectdb.o._JdoUserException: Failed to validate xml file \RTDLogger.jar#package.jdo: Connection timed out: connect NestedThrowables: java.net.ConnectException: Connection timed out: connect The same

these Keystore and Trustore files a client can verify during SSL handshaking that it is connected to the real ... the middle attack"). The server, on the other hand, might be less selective and allow connections ... , are needed only when the client is also signed (as explained above). Connecting using SSL Connecting

. Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections ... competing products . Connection Pooling Automatic connection pool managed by EntityManagerFactory. Configurable - minimum/maximum connections and timeout. Caching L1 entity object cache

that have to be provided when the user connects to the server. The optional ip attribute, if specified, restricts the user to connect to the server only from the specified IP addresses. For instance, "127.0.0.1 ... connecting from any IP address in the range of 192.18.0.0 to 192.18.194.255 , as well as from 127.0.0.1

these details to connect to the master server in order to listen to updates. The updates ... requires copying the existing master database to the slave side. Connecting to the Database Cluster ... the connection will automatically switch (temporarily) to the next available URL (i.e. in

transfer Your personal information in connection with, or during negotiations of, any merger, sale ... connection with the Service Protect the personal safety of Users of the Service or the public

 ( em ) that represents the connection (local or remote) to the database:     ... argument is specified as a java.io.File instance and em represents a client-server connection

of these temporary databases is deleted when using the drop URL connection parameter . The elements

. Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections (limited by operating system resources).

Given an EntityManager , em , that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects The following code fragment stores 1,000 Point  objects in the database: em. getTransaction (). begin

Contributor in connection with its distribution of the Program in a commercial product offering

connection URL - either embedded (e.g. c:\points.odb ) or client-server (e.g.  objectdb

method (preferred over JUnit). Use embedded mode to connect to the ObjectDB database directly

The TPC/IP port on which the server listens for new connections is also specified in the Server

the connection URL string. 8.1  Running an ObjectDB Server The ObjectDB server is a pure Java ... for new connections is specified in the configuration file (as explained in section 8.2 ... can be shared by all the database connections . The following is a simple configuration file

._PersistenceException: Connection is closed due to UserException: Connection is closed com.objectdb.o ... and just writing the condition to a log file, because if the database connection is closed, further attempts to close it are not necessary. support Support

a connection to the ObjectDB server. It happens on every start of the Context. If it fails ... restart tomcat. Other JPA providers are able to fetch the Metamodel without connecting to the DB. I ... getMetmodel works. If invoked before first connection to the server - the persistence unit model is analyzed locally on the client side. support Support

Connections to the database are represented in BIRT as data sources. To create an ObjectDB data ... the database connection url: Download and save the points.odb  database file (from the Quick Start tutorial ). Specify an ObjectDB connection url - either embedded (e.g. c:\points.odb ) or client

, IOException { // Obtain a database connection : EntityManagerFactory emf = (EntityManagerFactory ... , response); } finally { // Close the database connection : if (em.getTransaction().isActive()) em ... connection ) is constructed. If a new guest has registered (using a JSP form that is shown in

, HttpServletResponse response) throws ServletException, IOException { // Obtain a database connection ... .getRequestDispatcher("/guest.jsp") .forward(request, response); } finally { // Close the database connection ... , and then an EntityManager (representing a database connection ) is constructed. If a new guest has registered

To open a connection  to a remote database using client-server mode (supported only by ObjectDB ... the Open dialog you have to fill in the host, port, username and password of the remote connection ... " menu command to close a local database file or a connection  to a remote database file. The Tabbed

{ // Injected database connection : @PersistenceContext private EntityManager em; // Stores a new guest

connection : @PersistenceContext private EntityManager em; // Stores a new guest: @Transactional public

(String[] args) { // Open a database connection // (create a new database if it doesn't exist

a database connection // (create a new database if it doesn't exist yet): EntityManagerFactory emf

connection : @PersistenceContext private EntityManager em; // Stores a new guest: @Transactional public

; @Stateless public class GuestDao { // Injected database connection : @PersistenceContext private

metadata for persistence capable classes. Chapter 5 - JDO Connections Shows how to use database connections

"); 15 System.exit(1); 16 } 17 18 try { 19 // Obtain a database connection : 20 Properties properties

. Moving from one mode to the other can be done simply by changing a single string (the connection

be configured. If the ConnectionFactory property is set (non- null ) then all other Connection properties ... ) then all other Connection properties are ignored. Similarly, if the ConnectionFactory2 property ... pooling, connection pooling, operational parameters) must not be serialized. Since: JDO 1.0 Public