It also supports integrating external user authentication schemes; for example, it can be configured to check with an external authentication service. If this is the case, you will see an SQLException like the following:. This standards compliance enables a developer to write an application against Derby and deploy it against another DBMS. This means that object data will never be separated from its methods. When a database is deployed to a remote or mobile location, it is not possible to use physical security to prevent unauthorized access to data. Each Derby instance can manage multiple databases, the databases can live on various media, and there’s nothing to stop the application from connecting to other DBMS systems.
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The examples in this section use the syntax of the database connection URL for use in an embedded environment. Using Connection Pools with Client-side Applications. The databases can be archived into a jar or zip file or left as is.
Instead of specifying attributes on the database connection URL, you can specify attributes as properties in a Properties object that you pass as a second argument to the DriverManager.
Cloudscape Version A technical overview
This driver requires an Oracle client installation. Or, if the jar or zip file has been included in the class path, like this:. Subsubprotocolwhich is not typically specified, determines how Cloudscape looks for a database: Derby can be embedded easily into any Cloudscapr application program or server framework without introducing other programming languages because it is a Java class library. This technical article uses “Derby” when referring to any feature that is part of the open source database engine, including:.
Derby is a cloudsxape, embeddable relational engine in the form of a Java class library. It is possible to access databases from a jar file. The file should be in the format created by the java. You specify a path to the database within this database connection URL. Cloudscape database directories contain files and directories used by the software.
Cloudscape recommends that you always explicitly specify the system directory when starting up Cloudscape. Use only the prescribed utility for shutting it down. Unlike high-end enterprise databases housed in secure facilities, you might find Apache Derby databases anywhere you look — on servers, workstations, notebooks, laptops, kiosks, or, beginning in Derby Information on implemented features of the kdbc JDBC 2.
The system directory can also contain an error log file called cloudscape.
clousscape The default configuration for Cloudscape is that Cloudscape boots a database when an application first makes a connection to it. Not surprisingly, the existence of two names side-by-side Cloudscape and Derby sometimes causes confusion.
WebLogic JDBC Options
If you will be using a JDBC 2. Derby supplies JDBC OUT parameters so that values can be returned in parameters; this is done by having jddbc Java parameter be an array of the type desired. Thus the databases are left in a consistent, valid state. This driver is provided for your use without charge.
A Java stored procedure consists of Java code that is callable from SQL, runs in the database server, and accesses the database. The warning message looks like this: When you are executing a method within SQL-J, that cloudscap may need to reuse the current connection to the database in order to execute more SQL-J statements. Understanding the Cloudscape system is essential to successful development and deployment of Cloudscape applications. Like other databases, it allows multiple threads to share the same connection, and Derby implements many SQL99 features, with extensions for Java technology.
Derby can be run under a Java 2 security manager.
Booting The default configuration for Cloudscape is that Cloudscape boots a database when an application first makes a connection to it. To shut down the system within an SQL-J statement, you can use the following:.
Connect to cloudscape : Cloudscape « Database SQL JDBC « Java
With that in mind, this section clarifies what jfbc in the Apache Derby software and what is in the IBM Cloudscape product. You can access jarDB2 by specifying the path to the jar file along with the jar subsubprotocol, like this:. For example, suppose you have archived the database jarDB2 into a file called jar2. For more information on creating synchronization databases, see the Cloudscape Synchronization Guide.