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Java Java Data Structures - Retired Efficiency! Call Center Queue

hollowed King
hollowed King
2,530 Points

I do not see what I am missing here. Please provide assistance if you can.

States that I am missing something that is there...

CallCenter.java
import java.util.ArrayDeque;
import java.util.Queue;

public class CallCenter {
  Queue<CustomerSupportRep> mSupportReps;

  public CallCenter(Queue<CustomerSupportRep> queue) {
    mSupportReps = queue;
  }

  public void acceptCustomer(Customer customer) {
    CustomerSupportRep csr;
    /********************************************
     * TODO (1) 
     * Wait until there is an available rep in the queue.
     * While there is not one available, playHoldMusic
     * HINT: That while assignmentcheck loop syntax we used to 
      *      read files seems pretty similar
     ********************************************
     */

    while(mSupportReps.peek() == null) {
      playHoldMusic();
    }


    /********************************************
     * TODO (2) 
     * After we have assigned the rep, call the 
     * assist method and pass in the customer
     ********************************************
     */
      csr = new CustomerSupportRep("Bob");
      //mSupportReps.poll();
      csr.assist(customer);

    /********************************************
     * TODO (3) 
     * Since the customer support rep is done with
     * assisting, put them back into the queue.
     ********************************************
     */
      mSupportReps.offer(csr);

  }

  public void playHoldMusic() {
    System.out.println("Smooooooth Operator.....");
  }

}
CustomerSupportRep.java
import java.util.List;
import java.util.ArrayList;

public class CustomerSupportRep {
  private String mName;
  private List<Customer> mAssistedCustomers;

  public CustomerSupportRep(String name) {
    mName = name;
    mAssistedCustomers = new ArrayList<Customer>();
  }

  public void assist(Customer customer) {
    System.out.printf("Hello %s, my name is %s, how can I assist you.%n",
                      customer.getName(),
                      mName);
    System.out.println("...");
    System.out.println("Is there anything else I can help you with?");
    mAssistedCustomers.add(customer);
  }

  public List<Customer> getAssistedCustomers() {
    return mAssistedCustomers;
  }

}
Customer.java
public class Customer {
  private String mName;

  public Customer(String name) {
    mName = name;
  }

  public String getName() {
    return mName;
  }

}

1 Answer

Christopher Augg
Christopher Augg
21,223 Points

Hello Hollowed King,

The issue you are having can be found within your second TODO. You do not need to instantiate a new customer support rep as you have a csr within the queue causing the while loop to break. The peek method does not remove it from the the queue. Therefore, you just assign the csr by using the poll queue method as it would remove it from the queue. Then call the assist method and add csr back into the queue.

      csr = mSupportReps.poll();    
      csr.assist(customer);
      mSupportReps.add(csr);

I hope this helps.

Regards,

Chris