I already knew HTML pretty well. It consisted of servers filled with HTML documents that were accessed by users via their web browsers.
Java source code compiles to low-level machine instructions, known as bytecodes, that are platform independent. The Java bytecodes are interpreted through the JVM into platform-dependent actions. It supports the standard Java binary format and APIs. In addition, Oracle Database adheres to standard Java language semantics, including dynamic class loading at run time.
Figure illustrates how Oracle Java applications Server side programming on top of the Java core class libraries, which reside on top of the Oracle JVM.
Because the Oracle Java support system is located within the database, the JVM interacts with database libraries, instead of directly interacting with the operating system.
For example, in a standard Java environment, you run a Java application through the interpreter by issuing the following command on the command line, where classname is the name of the class that you want the JVM to interpret first: However, if you are not using the command-line interface, then you must load the application into the database, publish the interface, and then run the application within a database data dictionary.
This design optimizes memory use and increases throughput. Oracle JVM provides a run-time environment for Java objects. It fully supports Java data structures, method dispatch, exception handling, and language-level threads.
It also supports all the core Java class libraries, including java. Figure shows the main components of Oracle JVM. This feature lets Java programs access Java objects stored in Oracle Database and application servers across the enterprise.
In addition, Oracle JVM is tightly integrated with the scalable, shared memory architecture of the database.
Java programs use call, session, and object lifetimes efficiently without user intervention. As a result, Oracle JVM and middle-tier Java business objects can be scaled, even when they have session-long state.
The solution consists of client-side and server-side programmatic interfaces, tools to support Java development, and a Java Virtual Machine integrated with Oracle Database. All these products are compatible with Java standards.
The Java programming environment consists of the following additional features: Tools and scripts that assist in developing, loading, and managing classes. To publish Java methods, you write call specifications, which map Java method names, parameter types, and return types to their SQL counterparts.
When called by client applications, a Java stored procedure can accept arguments, reference Java classes, and return Java result values. Applications calling the Java method by referencing the name of the call specification.
The run-time system looks up the call specification definition in the Oracle data dictionary and runs the corresponding Java method. Both approaches are available on the client and server. As a result, you can deploy applications on the client and server without modifying the code.
However, JDBC is designed to enable vendors to supply drivers that offer the necessary specialization for a particular database. Oracle provides the distinct JDBC drivers shown in the following table. The JDBC Thin driver is especially well-suited for Web-based applications and applets, because you can dynamically download it from a Web page, similar to any other Java applet.
JDBC server-side internal driver Oracle Database uses the server-side internal driver when the Java code runs on the server. It provides a performance boost, because of its ability to use the underlying Oracle RDBMS libraries directly, without the overhead of an intervening network connection between the Java code and SQL data.
By supporting the same Java-SQL interface on the server, Oracle Database does not require you to rework code when deploying it. At run time, the program can communicate with multi-vendor databases using standard JDBC drivers.
The following example shows a simple SQLJ executable statement: Instead, you can compile them directly on the server. DML statements on a particular table or view, issued by any user DML statements modify data in schema objects. For example, inserting and deleting rows are DML operations.
For example, creating a table and adding a column are DDL operations. Database events User login or logoff, errors, and database startup or shutdown are events that can invoke triggers. Triggers are schema objects that are similar to subprograms but differ in the way they are invoked.Advanced Server-Side Programming with schwenkreis.com (3 ratings) Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
Notes: The university has decided not to replace our department server, it was shut down, for general use, on June 1, This will be my last time with the server-side course, the class may go on, but I will no longer be teaching it.
We had a good run - 14 years of this course, thanks for all the fun.
Server-side programming has many advantages over client-side programming. Advantages include: Improved performance. The amount of information that an application must send over a network is small compared with issuing individual SQL statements or sending the text of an entire PL/SQL block to Oracle Database, because the information is sent only once and thereafter invoked when it is used.
Server-side scripting is a method of designing websites so that the process or user request is run on the originating server. Server-side scripts provide an interface to the user and are used to limit access to proprietary data and help keep control of the script source code.
A lot of neat stuff came from DartConf , and the future for Google's Dart is looking strong. In this post, I will cover the new features of Aqueduct 3, an overview of things that are coming (or are already available), and instructions for running the pre-release version. Introduction to server-side scripting.
These days most websites on the Internet have dynamic content. This means that the content displayed to the user has not been written directly into the HTML page but rather it has been generated by selecting information from a database that resides on the server.