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The ObjectMap API provides a transactional map-based API that allows typical CRUD (Create, Read, Update and Delete) operations to the ObjectGrid cache. Similar to the java.util.Map interface, it also adds cache-specific semantics such as: batch access methods, entry eviction timeouts, locking hints, and entry copy mode overrides (for safety and performance).
Getting Started
Examples and Tutorials
The following example illustrates how to obtain ObjectMap and perform storing, finding, updating, and removing object operations using ObjectMap API:
import com.ibm.websphere.objectgrid.ObjectGrid;
import com.ibm.websphere.objectgrid.ObjectGridManager;
import com.ibm.websphere.objectgrid.ObjectGridManagerFactory;
import com.ibm.websphere.objectgrid.ObjectMap;
import com.ibm.websphere.objectgrid.Session;
public class ObjectMapExample {
public static void main(String[] args) throws Throwable {
ObjectGridManager objectGridManager = ObjectGridManagerFactory.getObjectGridManager();
ObjectGrid ivObjectGrid = objectGridManager.createObjectGrid("objectgridName");
ivObjectGrid.defineMap("myMap");
ivObjectGrid.initialize();
Session ivSession = ivObjectGrid.getSession();
ObjectMap objectMap = ivSession.getMap("myMap");
ivSession.begin();
objectMap.insert("key", "value");
ivSession.commit();
ivSession.begin();
String cachedObject = (String) objectMap.get("key");
ivSession.commit();
ivSession.begin();
cachedObject = (String) objectMap.get("key");
cachedObject = cachedObject + "_newValue";
objectMap.put("key", cachedObject);
ivSession.commit();
Object removedObject = objectMap.remove("key");
}
}
Related Information
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