ObjectGridManager インターフェースで、スタートアップ Bean またはサーブレットのいずれかを使用すると ObjectGrid インスタンスのライフサイクルを制御できます。
public class MyStartupBean implements javax.ejb.SessionBean {
private ObjectGridManager objectGridManager;
/* The methods on the SessionBean interface have been
* left out of this example for the sake of brevity */
public boolean start(){
// Starting the startup bean
// This method is called when the application starts
objectGridManager = ObjectGridManagerFactory.getObjectGridManager();
try {
// create 2 ObjectGrids and cache these instances
ObjectGrid bookstoreGrid = objectGridManager.createObjectGrid("bookstore", true);
bookstoreGrid.defineMap("book");
ObjectGrid videostoreGrid = objectGridManager.createObjectGrid("videostore", true);
// within the JVM,
// these ObjectGrids can now be retrieved from the
//ObjectGridManager using the getObjectGrid(String) method
} catch (ObjectGridException e) {
e.printStackTrace();
return false;
}
return true;
}
public void stop(){
// Stopping the startup bean
// This method is called when the application is stopped
try {
// remove the cached ObjectGrids and destroy them
objectGridManager.removeObjectGrid("bookstore", true);
objectGridManager.removeObjectGrid("videostore", true);
} catch (ObjectGridException e) {
e.printStackTrace();
}
}
}
ObjectGridManager objectGridManager =
ObjectGridManagerFactory.getObjectGridManager();
ObjectGrid bookstoreGrid = objectGridManager.getObjectGrid("bookstore");
ObjectGrid videostoreGrid = objectGridManager.getObjectGrid("videostore");
public class MyObjectGridServlet extends HttpServlet implements Servlet {
private ObjectGridManager objectGridManager;
public MyObjectGridServlet() {
super();
}
public void init(ServletConfig arg0) throws ServletException {
super.init();
objectGridManager = ObjectGridManagerFactory.getObjectGridManager();
try {
// create and cache an ObjectGrid named bookstore
ObjectGrid bookstoreGrid =
objectGridManager.createObjectGrid("bookstore", true);
bookstoreGrid.defineMap("book");
} catch (ObjectGridException e) {
e.printStackTrace();
}
}
protected void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
ObjectGrid bookstoreGrid = objectGridManager.getObjectGrid("bookstore");
Session session = bookstoreGrid.getSession();
ObjectMap bookMap = session.getMap("book");
// perform operations on the cached ObjectGrid
// ...
// Close the session (optional in Version 7.1.1 and later) for improved performance
session.close();
}
public void destroy() {
super.destroy();
try {
// remove and destroy the cached bookstore ObjectGrid
objectGridManager.removeObjectGrid("bookstore", true);
} catch (ObjectGridException e) {
e.printStackTrace();
}
}
}