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Java Java Data Structures - Retired Efficiency! Call Center Queue

Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Can someone help me understand the questinon?

I dont know what I have to do here ....

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.poll() == null){
      playHoldMusic();
      }

    /********************************************
     * TODO (2) 
     * After we have assigned the rep, call the 
     * assist method and pass in the customer
     ********************************************
     */
     assist(customer);

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

  }

  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

Heya Grigorij ,

You do not want to use poll() in your while loop because it returns the first element of the queue and removes it from the queue. Use peek instead so that you just test for the existence of a customer service rep within the queue.

Once you break out of the while loop, assign the first element in the queue to the csr using the poll() method this time.

Then call the csr assist method.

Then add the csr back into the queue.

Hope these hints help.

Regards,

Chris

Grigorij Schleifer
Grigorij Schleifer
10,365 Points

YEEEEEEEEE !!!!!

THANKS MASTER CHRIS !!!