com.ibm.websphere.servlet.cache
Interface ExternalCacheAdapter


public interface ExternalCacheAdapter

This is the service provider's interface (SPI) for plugging in an external cache (eg, the APFA cache, a web server cache, a proxy server cache or a sprayer cache). Each implementation of this interface encapsulates the particular protocol supported by an external cache. The CacheCoordinator calls this interface to manage pages in external caches. It is always called locally.

Restrictions on JSP fragments cached externally are the following:


Method Summary
 void clear()
          This method invalidates all pages from the external cache.
 void invalidatePages(java.util.Enumeration urls)
          This method invalidates pages that are in the external cache.
 void setAddress(java.lang.String address)
          Set the TCP/IP address of the cache adapter
 void writePages(java.util.Enumeration externalCacheEntries)
          This method writes pages to the external cache.
 

Method Detail

setAddress

public void setAddress(java.lang.String address)
Set the TCP/IP address of the cache adapter

writePages

public void writePages(java.util.Enumeration externalCacheEntries)
This method writes pages to the external cache.
Parameters:
externalCacheEntries - The Enumeration of ExternalCacheEntry objects for the pages that are to be cached.

invalidatePages

public void invalidatePages(java.util.Enumeration urls)
This method invalidates pages that are in the external cache.
Parameters:
urls - The Enumeration of URLs for the pages that have previously been written to the external cache and need invalidation.

clear

public void clear()
This method invalidates all pages from the external cache.