@Override
// @Stateless
public ListenableFuture<Folder> open(String folder, boolean readWrite) {
Preconditions.checkState(
mailClientHandler.isLoggedIn(), "Can't execute command because client is not logged in");
Preconditions.checkState(
!mailClientHandler.idleRequested.get(),
"Can't execute command while idling (are you watching a folder?)");
final SettableFuture<Folder> valueFuture = SettableFuture.create();
final SettableFuture<Folder> externalFuture = SettableFuture.create();
valueFuture.addListener(
new Runnable() {
@Override
public void run() {
try {
// We do this to enforce a happens-before ordering between the time a folder is
// saved to currentFolder and a listener registered by the user may fire in a parallel
// executor service.
currentFolder = valueFuture.get();
externalFuture.set(currentFolder);
} catch (InterruptedException e) {
log.error("Interrupted while attempting to open a folder", e);
} catch (ExecutionException e) {
log.error("Execution exception while attempting to open a folder", e);
externalFuture.setException(e);
}
}
},
workerPool);
String args = '"' + folder + "\"";
send(readWrite ? Command.FOLDER_OPEN : Command.FOLDER_EXAMINE, args, valueFuture);
return externalFuture;
}
@Override
public void addListener(Runnable runnable, Executor executor) {
settableFuture.addListener(runnable, executor);
}
