public IRegisterDMData readRegister(Object element) {
/*
* Get the DMC and the session. If element is not an register DMC, or
* session is stale, then bail out.
*/
IRegisterDMContext dmc = getRegisterDMC(element);
if (dmc == null) return null;
DsfSession session = DsfSession.getSession(dmc.getSessionId());
if (session == null) return null;
/*
* Create the query to request the value from service. Note: no need to
* guard agains RejectedExecutionException, because
* DsfSession.getSession() above would only return an active session.
*/
GetRegisterValueQuery query = new GetRegisterValueQuery(dmc);
session.getExecutor().execute(query);
/*
* Now we have the data, go and get it. Since the call is completed now
* the ".get()" will not suspend it will immediately return with the
* data.
*/
try {
return query.get();
} catch (InterruptedException e) {
assert false;
return null;
} catch (ExecutionException e) {
return null;
}
}
public void writeRegister(Object element, String value, String formatId) {
/*
* Get the DMC and the session. If element is not an register DMC, or
* session is stale, then bail out.
*/
IRegisterDMContext dmc = getRegisterDMC(element);
if (dmc == null) return;
DsfSession session = DsfSession.getSession(dmc.getSessionId());
if (session == null) return;
/*
* Create the query to write the value to the service. Note: no need to
* guard agains RejectedExecutionException, because
* DsfSession.getSession() above would only return an active session.
*/
SetRegisterValueQuery query = new SetRegisterValueQuery(dmc, value, formatId);
session.getExecutor().execute(query);
/*
* Now we have the data, go and get it. Since the call is completed now
* the ".get()" will not suspend it will immediately return with the
* data.
*/
try {
/*
* Return value is irrelevant, any error would come through with an
* exception.
*/
query.get();
} catch (InterruptedException e) {
assert false;
} catch (ExecutionException e) {
/*
* View must be shutting down, no need to show erro dialog.
*/
}
}
public IRegisterDMData getRegisterDMData(Object element) {
IRegisterDMContext dmc = null;
if (element instanceof IDMVMContext) {
dmc =
DMContexts.getAncestorOfType(
((IDMVMContext) element).getDMContext(), IRegisterDMContext.class);
}
if (dmc != null) {
DsfSession session = DsfSession.getSession(dmc.getSessionId());
if (session != null) {
GetRegisterDataQuery query = new GetRegisterDataQuery(dmc);
session.getExecutor().execute(query);
try {
return query.get();
} catch (InterruptedException e) {
} catch (ExecutionException e) {
}
}
}
return null;
}