/**
* Lazy initialization of the assignment map. For each ambulance that is currently being displayed
* (the current CRUD page, represented by the attribute entities), checks if there's an active
* assignment and stores the appropriate information (driver name, or "unassigned", properly
* internationalized) to the assignment map.
*/
private void initCurrentAssignments() {
logger.log(Level.INFO, "Initializing current drivers map for {0} entities.", entities.size());
currentAssignments = new TreeMap<Long, String>();
for (Ambulance ambulance : entities) {
// Retrieves the current assignment (if any) for this ambulance.
DriverAssignment assignment = null;
try {
assignment = getCrudService().retrieveActiveAssignment(ambulance);
} catch (AmbulanceHasMultipleCurrentDriverAssignmentsException e) {
logger.log(
Level.SEVERE,
"There has been an error while retrieving the active assignment of ambulance # "
+ ambulance.getNumber()
+ " (id "
+ ambulance.getId()
+ ")",
e);
addGlobalI18nMessage(
"msgs",
FacesMessage.SEVERITY_ERROR,
"manageAmbulances.error.assignmentError",
ambulance.getNumber());
}
// Displays the status depending if the ambulance is active or not.
currentAssignments.put(
ambulance.getId(),
getI18nMessage(
"msgs",
(assignment == null)
? "manageAmbulances.text.currentDriver.none"
: assignment.getDriver().getName()));
}
}
/**
* Called from a link in the ambulance table, selects an ambulance (through its id) and view the
* current (active) assignment, if any. Redirects to the assignments page, which allows the
* administrator to end the current assignment or change it, or even start a new one if the
* ambulance is not currently assigned.
*
* <p>This method executes a scenario in the service class.
*
* @param id The id of the selected ambulance.
* @return The path to the assignments page.
*/
public String manageAssignments(Long id) {
// Retrieve the selected ambulance.
selectedEntity = getCrudService().retrieve(id);
logger.log(
Level.INFO,
"Selected ambulance # {0} (id {1}). Opening assignments page.",
new Object[] {selectedEntity.getNumber(), id});
// Clear the assignment history (possibly of another ambulance).
allAssignments = null;
// Retireve the current assignment (if any) for this ambulance.
try {
currentAssignment = getCrudService().retrieveActiveAssignment(selectedEntity);
} catch (AmbulanceHasMultipleCurrentDriverAssignmentsException e) {
logger.log(
Level.SEVERE,
"There has been an error while retrieving the active assignment of ambulance # "
+ selectedEntity.getNumber()
+ " (id "
+ selectedEntity.getId()
+ ")",
e);
addGlobalI18nMessage(
"msgs",
FacesMessage.SEVERITY_ERROR,
"manageAmbulances.error.assignmentError",
selectedEntity.getNumber());
return null;
}
// If there is no current assignment for the ambulance, create a new one for the new assignment
// form.
free = currentAssignment == null;
if (free) {
currentAssignment = new DriverAssignment();
currentAssignment.setBeginDate(new Date(System.currentTimeMillis()));
}
return ASSIGNMENTS_PAGE;
}
/**
* Called from the assignment page's form, sends the data on the end of the current assignment
* and/or the beginning of a new one and changes the driver assigned to the ambulance.
*
* <p>This method executes a scenario in the service class.
*/
public void changeAssignment() {
// Only change an assignment if the driver actually changed.
if ((driverId != null)
&& (currentAssignment.getDriver() != null)
&& (driverId.equals(currentAssignment.getDriver().getId()))) {
logger.log(
Level.WARNING,
"Assigning ambulance # {0} (id {1}) with the same driver. Current assignment's driver's ID: {3}, supplied ID: {4}.",
new Object[] {
selectedEntity.getNumber(),
selectedEntity.getId(),
currentAssignment.getDriver().getId(),
driverId
});
addGlobalI18nMessage(
"msgs",
FacesMessage.SEVERITY_WARN,
"manageAmbulances.warn.sameDriverAssignment",
currentAssignment.getDriver().getName());
} else {
Employee driver = (driverId == null) ? null : employeeDAO.retrieveById(driverId);
try {
// If the driver was specified, create a new assignment, possibly ending a current
// assignment.
if (driver != null) {
logger.log(
Level.INFO,
"Assigning ambulance # {0} (id {1}). Driver: {2}.",
new Object[] {selectedEntity.getNumber(), selectedEntity.getId(), driver.getName()});
currentAssignment = getCrudService().assignAmbulance(selectedEntity, driver);
free = false;
addGlobalI18nMessage(
"msgs", FacesMessage.SEVERITY_INFO, "manageAmbulances.info.assignmentStarted");
}
// If not, end the current assignment.
else {
logger.log(
Level.INFO,
"Ending current assignment for ambulance # {0} (id {1}).",
new Object[] {selectedEntity.getNumber(), selectedEntity.getId()});
getCrudService().endCurrentAssignment(selectedEntity);
currentAssignment = null;
free = true;
addGlobalI18nMessage(
"msgs", FacesMessage.SEVERITY_INFO, "manageAmbulances.info.assignmentEnded");
}
} catch (AmbulanceHasMultipleCurrentDriverAssignmentsException e) {
logger.log(
Level.SEVERE,
"There has been an error while assigning a driver to ambulance # "
+ selectedEntity.getNumber()
+ " (id "
+ selectedEntity.getId()
+ ")",
e);
addGlobalI18nMessage(
"msgs",
FacesMessage.SEVERITY_ERROR,
"manageAmbulances.error.assignmentError",
selectedEntity.getNumber());
driverId = null;
} catch (AmbulanceHasNoCurrentDriverAssignmentsException e) {
logger.log(
Level.SEVERE,
"There has been an error while assigning a driver to ambulance # "
+ selectedEntity.getNumber()
+ " (id "
+ selectedEntity.getId()
+ ")",
e);
addGlobalI18nMessage(
"msgs",
FacesMessage.SEVERITY_ERROR,
"manageAmbulances.error.assignmentError",
selectedEntity.getNumber());
driverId = null;
} catch (EmployeeIsNotDriverException e) {
logger.log(
Level.SEVERE,
"There has been an error while assigning a driver to ambulance # "
+ selectedEntity.getNumber()
+ " (id "
+ selectedEntity.getId()
+ "): the specified employee ("
+ driver.getLogin()
+ ") is not a driver!",
e);
addGlobalI18nMessage(
"msgs",
FacesMessage.SEVERITY_ERROR,
"manageAmbulances.error.assignmentErrorNotDriver",
driver.getName(),
selectedEntity.getNumber());
driverId = null;
}
}
}
