Specifies the mapping of file extensions to mime types.

Table 25-1 Common Protocol Configuration Parameters Parameter State for each user must be stored in the database or in a look-up table, rather than assuming that a session will only exist for a single user. Hence, servlet writers should only use session memory, such as Java static variables, to hold data for the entire application rather than for a particular user. Session pooling can affect users writing Java servlets, because other users can see session state initialized by another request for a different user. You can tune the number of sessions in the pool by setting session-pool-size in Oracle XML DB xdbconfig.xml file, or disable it by setting pool size to zero. For example, a couple of small files can be retrieved by an existing HTTP/1.1 connection in the time necessary to create a database session.

Session pooling improves performance of HTTP(S) by avoiding the cost of re-creating session states, especially when using HTTP 1.0, which creates new connections for each request. After a connection is closed the session is put back into the shared pool and can be used to serve later connections. Each protocol connection is associated with one session from this pool. Oracle XML DB protocol server maintains a shared pool of sessions. DBAs can use these protocols and resource APIs such as DBMS_XDB to access Automatic Storage Management (ASM) files and folders in the repository virtual folder /sys/asm. The user names and passwords to be used with the protocols are the same as those for SQL*Plus.

These protocols can provide direct access to Oracle XML DB for many users without having to install additional software. Note that HTTPS provides secure access to Oracle XML DB Repository. This supports standard Internet protocols, FTP, WebDAV, and HTTP(S), for accessing its hierarchical repository or file system. Oracle XML DB also provides the Oracle XML DB protocol server. Oracle XML DB Repository maps path names (or URLs) onto database objects of XMLType and provides management facilities for these objects. Overview of Oracle XML DB Protocol ServerĪs described in Chapter 2, 'Getting Started with Oracle XML DB' and Chapter 20, 'Accessing Oracle XML DB Repository Data', Oracle XML DB Repository provides a hierarchical data repository in the database, designed for XML.

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