To indicate that a Worker has accepted or rejected a Task, you make an HTTP
POST
request to a Reservation instance resource. To do that, we need the
TaskSid, which is available via the web portal, and the ReservationSid. The
ReservationSid was passed to our Assignment Callback URL when a Worker was
reserved for our Task. Using the ngrok inspector page at
http://localhost:4040
, we can easily find the request parameters sent from
TaskRouter and copy the ReservationSid to our clipboard. **
The Reservation API resource is ephemeral and exists only within the context of a Task. As such, it doesn't have its own primary API resource and you'll find it documented in the Tasks resource section of the reference documentation.
With our trusty TaskSid and ReservationSid in hand, let's make another REST API request to accept our Task Reservation. We'll add on to our TwilioTaskRouterServlet
to accept a reservation with our web server. Remember to substitute your own account details in place of the curly braces.
_66import java.io.IOException;_66_66import javax.servlet.http.HttpServlet;_66import javax.servlet.http.HttpServletRequest;_66import javax.servlet.http.HttpServletResponse;_66_66import com.twilio.Twilio;_66import com.twilio.rest.taskrouter.v1.workspace.Task;_66import com.twilio.rest.taskrouter.v1.workspace.task.Reservation;_66_66public class TwilioTaskRouterServlet extends HttpServlet {_66_66 private String accountSid;_66 private String authToken;_66 private String workspaceSid;_66 private String workflowSid;_66_66 @Override_66 public void init() {_66 accountSid = this.getServletConfig().getInitParameter("AccountSid");_66 authToken = this.getServletConfig().getInitParameter("AuthToken");_66 workspaceSid = this.getServletConfig().getInitParameter("WorkspaceSid");_66 workflowSid = this.getServletConfig().getInitParameter("WorkflowSid");_66_66 Twilio.init(accountSid, authToken);_66 }_66_66 // service() responds to both GET and POST requests._66 // You can also use doGet() or doPost()_66 @Override_66 public void service(final HttpServletRequest request, final HttpServletResponse response)_66 throws IOException {_66 if (request.getPathInfo() == null || request.getPathInfo().isEmpty()) {_66 return;_66 }_66_66 if (request.getPathInfo().equals("/assignment_callback")) {_66 response.setContentType("application/json");_66 response.getWriter().print("{}");_66 } else if (request.getPathInfo().equals("/create_task")) {_66 response.setContentType("application/json");_66 response.getWriter().print(createTask());_66 } else if (request.getPathInfo().equals("/accept_reservation")) {_66 response.setContentType("application/json");_66 final String taskSid = request.getParameter("TaskSid");_66 final String reservationSid = request.getParameter("ReservationSid");_66 response.getWriter().print(acceptReservation(taskSid, reservationSid));_66 }_66 }_66_66 public String createTask() {_66 String attributes = "{\"selected_language\":\"es\"}";_66_66 Task task = Task.creator(workspaceSid, attributes, workflowSid).create();_66_66 return "{\"task_sid\":\"" + task.getSid() + "\"}";_66 }_66_66 public String acceptReservation(final String taskSid, final String reservationSid) {_66 Reservation reservation = Reservation.updater(workspaceSid, taskSid, reservationSid)_66 .setReservationStatus(Reservation.Status.ACCEPTED)_66 .update();_66_66 return "{\"worker_name\":\"" + reservation.getWorkerName() + "\"}";_66 }_66}
If you'd like to use curl instead, put the following into your terminal:
_10curl https://taskrouter.twilio.com/v1/Workspaces/{WorkspaceSid}/Tasks/{TaskSid}/Reservations/{ReservationSid} \_10-d ReservationStatus=accepted \_10-u {AccountSid}:{AuthToken}
Examining the response from TaskRouter, we see that the Task Reservation has been accepted, and the Task has been assigned to the Worker Alice:
_10{... "worker_name": "Alice", "reservation_status": "accepted", ...}
If you don't see this, it's possible that your Reservation has timed out. If this is the case, set your Worker back to an available Activity state and create another Task. To prevent this occurring, you can increase the 'Task Reservation Timeout' value in your Workflow configuration.
With your Workspace open in the TaskRouter web portal, click 'Workers' and you'll see that Alice has been transitioned to the 'Assignment Activity' of the TaskQueue that assigned the Task. In this case, "Busy":
Hurrah! We've made it to the end of the Task lifecycle:
Task Created → eligible Worker becomes available → Worker reserved → Reservation accepted → Task assigned to Worker.
In the next steps, we'll examine more ways to perform common Task acceptance and rejection workflows.
Next: Accept a Reservation using Assignment Instructions »
** If you're not using ngrok or a similar tool, you can modify assignment.php to print the value of ReservationSid to your web server log. Or, you can use the Tasks REST API instance resource to look up the ReservationSid based on the TaskSid.