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Java Java Data Structures - Retired Efficiency! Call Center Queue

Rob Bridges
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Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,467 Points

Stuck on the call center challenge, telling me I'm not calling the assist method.

It's saying "bummer, did you remember to call the assist method on the CustomerServiceRep?

It looks like I have, not sure what isn't clicking with this.

Any help?

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 = new CustomerSupportRep("John");
    /********************************************
     * 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
     ********************************************
     */
    mSupportReps.remove(csr);
    csr.assist(customer);

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

}
Edane Barton
Edane Barton
11,457 Points

Prior to reading the answer below, re-watch the 'custom serialization' video at 4:44 mark to get the answer to the hint.

1 Answer

Christopher Augg
Christopher Augg
21,223 Points

Hello Rob,

You a very close! You can take a look at this post and see one way to complete this : https://teamtreehouse.com/forum/challenge-efficiency Patrick's code is actually correct. Craig had to fix the test code. Way to go at finding the bug Patrick!

The initial way the test code was looking for involves doing the assignment in the while like Craig did in the video:

  while((csr = mSupportReps.poll() ) == null){
      playHoldMusic();
  }
  csr.assist(customer);
  mSupportReps.add(csr);

I hope this helps.