try { entity.enable(); } catch (RETCODE_ERROR err) { System.out.println( "*** Error: failed to enable entity"); }
int status_changes_list = entity.get_status_changes();
status_kind
was changed since the last time it was cleared. A plain communication status change is cleared when the status is read using the entity's get_<plain communication status>()
method. A read communication status change is cleared when the data is taken from the middleware via a TDataReader_take() call [see Changes in Status for details]. if ((status_changes_list & status_kind) != 0) { return true; /* ... YES, status_kind changed ... */ } else { return false; /* ... NO, status_kind did NOT change ... */ }
try { entity.get_qos(qos); } catch (RETCODE_ERROR err) { System.out.println("***Error: failed to get qos\n"); }
/* Change the desired qos policies */ /* qos.policy.field = ... */
try { entity.set_qos(qos); } catch (RETCODE_IMMUTABLE_POLICY immutable) { System.out.println( "***Error: tried changing a policy that can only be" + " set at entity creation time\n"); } catch (RETCODE_INCONSISTENT_POLICY inconsistent) { System.out.println( "***Error: tried changing a policy to a value inconsistent" + " with other policy settings\n"); } catch (RETCODE_ERROR other) { System.out.println( "***Error: tried changing a policy that can only be" + " set at entity creation time\n"); }
Once an entity has been created, its listener and/or the statuses for which it is enabled can be manipulated as follows.
/* ... methods defined by EntityListener ... */ public class MyEntityListener implements Listener { // ... methods defined by EntityListener ... }
entity_listener = entity.get_listener();
status_kind
for the listener
enabled_status_list |= status_kind;
status_kind
for the listener
enabled_status_list &= ~status_kind;
entity_listener
using set_listener (abstract). Only enable the listener for the statuses specified by the enabled_status_list
. try { entity.set_listener(entity_listener, enabled_status_list); } catch (RETCODE_ERROR err) { // respond to failure }
Once an entity has been created, the list of statuses for which the DDS_StatusCondition is triggered can be manipulated as follows.
entity
, a status_kind
, and the associated status_condition:
statuscondition = entity.get_statuscondition();
status_condition
enabled_status_list = statuscondition.get_enabled_statuses();
status_kind
is enabled for the status_condition
if ((enabled_status_list & status_kind) > 0) { /*... YES, status_kind is enabled ... */ } else { /* ... NO, status_kind is NOT enabled ... */ }
status_kind
for the status_condition
try { statuscondition.set_enabled_statuses(enabled_status_list | status_kind); } catch (RETCODE_ERROR err) { // ... check for cause of failure }
status_kind
for the status_condition
try { statuscondition.set_enabled_statuses(enabled_status_list & ~status_kind); } catch (RETCODE_ERROR err) { // ... check for cause of failure }