Help needed to sync cache with the database using CacheStore

Question

Hi,
I need to have my cache in sync with the database. I followed the tutorial to create a DBCacheStore class which will act as a CacheStore between Cache and my Oracle database. My Cache-Config file contains
<backing-map-scheme>
                    <read-write-backing-map-scheme>
                         <internal-cache-scheme>
                              <local-scheme></local-scheme>
                         </internal-cache-scheme>
                         <cachestore-scheme>
                              <class-scheme>
                                   <class-name>com.coherence.cacheUtil.DBCacheStore</class-name>
                                   <init-params>
                                        <init-param>
                                             <param-type>java.lang.String</param-type>
                                             <param-value>{cache-name}</param-value>
                                        </init-param>
                                   </init-params>
                              </class-scheme>
                         </cachestore-scheme>                         
                    </read-write-backing-map-scheme>                    
               </backing-map-scheme>
Now, what I am trying to achieve is,
1. Load the cache with values when the cache server is up, without any need to run separate program
2. Integrate all read/write cache operations with the database
I am aware that CacheStore class implements store, storeAll, erase, eraseAll, load, loadAll methods from undelying interface and I need to write corresponding code to add/remove/update records in the database.
But, I am really not sure how and when to include the logic to load the cache with the data from the database when the server is up.
Thank for the help. Much appreciated!

Answer 1

Could you try something like this to load the cache?
HashSet buffer=new HashSet();
s = conn.createStatement();
rs = s.executeQuery("select key from table");
while (rs.next())
String key = rs.getString(1);
buffer.add(key);
// this loads 1000 items at a time into the cache
if ((count++ % 1000) == 0)
cache.getAll(buffer);
buffer.clear();
if (!buffer.isEmpty())
cache.getAll(buffer);
This web page also gives a good example:
http://www.oracle.com/technology/pub/articles/vohra-coherence.html
-Luk