How can I close BDB Environment and EntityStore in RMI Application

Question

Hi,all.
I create Only one instance of the Environment object and one instance of the EntityStore Object when the RMI server is first started,like this:
public class CalculatorServer {
protected Environment env;
protected EntityStore store;
public CalculatorServer() {
try {
initBDB();
String hostkey = "java.rmi.server.hostname";
String rmisHost = "127.0.0.1";
int port = 30000;
Registry reg = (Registry) null;
System.setProperty(hostkey, rmisHost);
reg = LocateRegistry.createRegistry(port);
reg.bind("/service/testrmi", new CalculatorImpl().initObject());
} catch (RemoteException e) {
e.printStackTrace();
} catch (AlreadyBoundException e) {
e.printStackTrace();
public void initBDB() {
EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setAllowCreate(true);
/** 设置事务 **/
envConfig.setTransactional(false);
envConfig.setLockTimeout(5, TimeUnit.SECONDS);
env = new com.sleepycat.je.Environment(new File("test1"), envConfig);
StoreConfig storeConfig = new StoreConfig();
storeConfig.setAllowCreate(true);
/** 设置事务 **/
storeConfig.setTransactional(false);
/** 是否开启延迟写入**/
storeConfig.setDeferredWrite(true);
store = new EntityStore(env, "entityStore", storeConfig);
public static void main(String args[]) {
new CalculatorServer();
1） in this approach,Do I need to close Environment and EntityStore?
thanks

Answer 1

The code you posted is not the BDB JE code you're using, so it doesn't help to diagnose the problem you're having. Please post your EnvironmentConfig and StoreConfig setup code, and your code to use Transactions, if any.
If your store is not transactional (EntityStore.setTransactional(true)), the data is not guaranteed to be durable/persistent until you call Environment.sync, or close the Environment cleanly. If your store is transactional, then durability is controlled by the TransactionConfig you use, or the Durability parameter of the Transaction.commit method. The default durability is set using EnvironmentMutableConfig.setDurability.
Be sure to close the EntityStore and Environment cleanly when your program exists, as I mentioned earlier.
--mark