Features of DynaCache
DynaCache provides support for caching the returned results from Java™ object calls.
The main features of DynaCache are described in Table 1.
| Cache object | Description |
|---|---|
| Servlet/JSP results | DynaCache can cache any existing whole page or fragment generated by a servlet or JSP. DynaCache matches data found in the HTTP request header with the cache rules specified in the XML configuration file, named cachespec.xml. |
| Command cache (Web Services, POJOs and EJBs) | Used to cache dynamic data before it is transformed into a presentable format (that is, HTML). These include EJB and Web service responses. A cacheable command object must inherit from the class com.ibm.websphere.command.cachableCommandImpl for it to work with DynaCache. |
| Replication support | Enables cache sharing and replication in a clustered environment. |
| Invalidation support | Includes rules-based, time-based, group-based, and programmatic cache invalidation techniques to ensure the freshness, consistency, and accuracy of the content. |
| Edge of network caching support | Extends the WebSphere® Application Server caches into network-based caches, through the implementation of external cache control and distributed-fragment caching and assembly support. |
| JSR168 compliant portlets | DynaCache can cache any existing whole page or fragment generated by a servlet, JSP or a JSR 168 compliant Portlet1. DynaCache matches data found in the HTTP request header with the cache rules specified in the XML configuration file, named cachespec.xml. |
| Cache monitor | Cached results can be viewed and managed using a cache monitor J2EE application. The cache monitor provides a GUI interface to change the cached data manually. You have to install the application manually with the CacheMonitor.ear file (located in the <WAS_HOME>/installableapps directory) using the WAS Admin GUI. This installable Web application provides a real-time view of the state of the DynaCache. The only way to externally manipulate the data in the cache is by using the cache monitor. After installation, the cache monitor can be accessed as: http://your host_name:your port_number/cachemonitor. |
The IBM® Extended Cache Monitor for IBM WebSphere Application Server provides two functions that are not available with the cache monitor that is supplied with WebSphere Application Server. These two functions enable you to:
- Display the contents of object cache instances.
- Display the Dynamic Cache mbean statistics for cache instances.
The IBM Extended Cache Monitor for IBM WebSphere Application Server is available from http://www.ibm.com/developerworks/websphere/downloads/cache_monitor.html.