Utility base class for caching per-user information across multiple connector invocations (uses
ConnectorContext.getConnectorCache() to store this object). Users should subclass this class and implement
thread-safe methods which generate the data to be cached on demand (no work should be done in the constructor of this
object).
Example:
public class MyCache extends ConnectorCache {
private static final ConnectorCacheFactory MY_FACTORY =
new ConnectorCacheFactory() {
@Override
public MyCache createCache(String key, BrowseContext context) {
return new MyCache(key);
}
};
private MyParsedWsdl _parsedWsdl;
public MyCache(String url) {
super(url);
}
public synchronized MyParsedWsdl getParsedWsdl() {
if (_parsedWsdl == null) {
String url = getKey();
// ... parse wsdl from url ...
}
return _parsedWsdl;
}
public static MyCache getCache(String url, BrowseContext context) {
return getCache(url, context, MY_FACTORY);
}
}
Additionally, this cache support the ability for cache items to be invalidated (lazily). Subclasses can provide
override the isValid() method to control when a cache should be discarded. See ExpiringConnectorCache
for a simple implementation of a ConnectorCache which expires after a certain amount of time.