You can easily establish a connection from inside the IDE and begin working with the database. This tutorial demonstrates how to use a local installation of Oracle Database 10 g Express Edition Oracle Database XE , a lightweight database that is free to develop, deploy, and distribute.
Note for Windows users: Windows may change the extension of the downloaded file from. It is still a. You can rename the file to. Oracle GlassFish Application Server also uses port by default. If you run both programs at the same time, Oracle Database XE blocks browsers from accessing GlassFish at localhost All applications deployed on GlassFish return in this case. If you need to run both at the same time, change the default port that Oracle Database XE uses. This is easier than changing the GlassFish default port.
There are many sets of instructions on the Internet for changing the Oracle Database XE default port, including one in Oracle forums. Enter the username. For the purpose of our tutorial, enter system the default database administrator account and password that you used during database installation.
The new connection will appear under the Databases node in the Services window. You can expand it and start browsing the database object's structure. Change the display name for the connection node: choose Properties from the node's popup menu and click the ellipsis button for the Display Name property. Although the steps above demonstrate the case of connecting to a local database instance, the steps for connecting to a remote database are the same.
The only difference is that instead of specifying localhost as the hostname, enter the IP address or hostname of the remote machine where Oracle Database is installed. A common way of interacting with databases is running SQL commands in an SQL editor or by using database management interfaces. For example, Oracle Database XE has a browser-based interface through which you can administer the database, manage database objects, and manipulate data. Although you can perform most of the database-related tasks through the Oracle Database management interface, in this tutorial we demonstrate how you can make use of the SQL Editor in the NetBeans IDE to perform some of these tasks.
The only time an end user should see an interruption in service is when the outage is such that there is no point in continuing. Following any outage that is due to a loss of database service, planned or unplanned, Application Continuity rebuilds the database session. If a callback is registered, issues a callback allowing the application to re-establish initial state for that session. The Oracle driver determines the timing of replay calls. Calls may be processed chronologically or using a lazy processing implementation depending on how the application changes the database state.
The replay is controlled by the Oracle 12c Database Server. For a replay to be approved, each replayed call must return exactly the same client visible state that was seen and potentially used by the application during the original call execution. The following section provides requirements and items to consider when using Application Continuity with WebLogic applications:. For this release, Application Continuity only supports read and write transactions.
XA transactions are not supported. See Selecting the Driver for Application Continuity. Deprecated oracle. Occurrences should be changed to use either the corresponding oracle. Oracle recommends using the standard java. Application Continuity works by storing intermediate results in memory. An application may run slower and require significantly more memory than running without the feature.
Using the WebLogic statement cache is not supported. The size of the WebLogic statement cache must be set to 0. There are additional limitations and exceptions to the Application Continuity feature which may affect whether your application can use Replay.
For example:. The following sections provide information on how to implement Application Continuity in your environment:. The administration console does not have an entry for a replay driver. To configure the JDBC replay data source, you must manually replace the existing Oracle data source class with the replay data source class oracle. Make sure the Database Type is Oracle.
See Requirements and Considerations. To create a connection initialization callback, your application must implement the initialize java. Connection connection method of the oracle. ConnectionInitializationCallback interface. Only one callback can be created per connection pool. The callback is ignored if a labeling callback is registered for the connection pool. Otherwise, the callback is executed at every connection check out from the pool and at each successful reconnect following a recoverable error at replay.
Use of the same callback at run time and at replay ensures that exactly the same initialization that was used when the original session was established is used during the replay. Each database can have multiple connection and authentication methods.
Switch to a different method from the dropdown menu. You can use the first tab to connect, and then see the created URL in the second tab. Connectivity Troubleshooting If you get problems connecting to the database, please remember : Press the ping button in the connection dialog to make sure the host and port are reachable.
Enable Remote connections as they are not always enabled by default. This may require configuration changes. Windows Firewall may block the communication.
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