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Java Java Data Structures - Retired Efficiency! Call Center Queue

Jay Bhatt
Jay Bhatt
6,502 Points

How do I figure out if the queue is available? And how do I call the assist method withoutgetting the "non-static"error?

Please help, I have been staring at this for hours.

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;

    while (mSupportReps.isEmpty()) {
      playHoldMusic();
    }
    /********************************************
     * 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
     ********************************************
     */
    if (mSupportReps.size() > 0) {
      CustomerSupportRep.assist(customer);
    }
    /********************************************
     * TODO (2) 
     * After we have assigned the rep, call the 
     * assist method and pass in the 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;
  }

}

2 Answers

Hello

Please see this part of the code you pasted

if (mSupportReps.size() > 0) { CustomerSupportRep.assist(customer); }

You don't call the Class, you call the instance of the class ...

as in csr..assist(customer);

I think this should solve the error

if this answers you question, please mark the question as answered.

Thanks

Jay Bhatt
Jay Bhatt
6,502 Points

This rid the error of the static one. However I have new issue now, it says the csr has not been initialized. However if you see in the code, it is initialized hence we are using it as an instance of the class CustomerSupportRep. How do I fix this issue?

Hello

CustomerSupportRep csr;

does not initialize csr, it simply create a reference to an instance of type CustomerSupportRep. At this point, this is a pointer to null.

to initlialize csr, you have to call a constructor as in CustomerSupportRep csr = new CustomerSupportRep();

take a look here to see what other follow student is doing for this partivlar line

https://teamtreehouse.com/community/why-is-the-operator-not-out-of-the-queue-even-though-i-have-used-poll-to-take-him-out

Hope this helps;