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Start your free trialMichael C
3,230 PointsChallenge "Efficiency"
Meh I kinda don't get it to run.
I would like to see how the author adds the CSR to the Queue so I can define better why this isn't working.
I created a while-loop which plays that hold music. But just as long as there is nothing within the queue (queue.peek() == null).
Everything what comes after the while-loop expects that the queue is not empty. And since the while-loop skipped that has to be true.
Where am I missing here (AGAIN!!!!!!!!) :)
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();
}
csr = mSupportReps.poll();
csr.assist(customer);
mSupportReps.add(csr);
/********************************************
* 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.....");
}
}
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;
}
}
public class Customer {
private String mName;
public Customer(String name) {
mName = name;
}
public String getName() {
return mName;
}
}
3 Answers
Christopher Augg
21,223 PointsHello Patrick,
You are very close! The key element you are missing is from the HINT in the comments
- HINT: That while assignment check loop syntax we used to
- read files seems pretty similar
In the video, Craig showed how to do an assignment operation within the while ((assignment) == null)
I hope that helps as it is the only issue I see with you current code. Please let me know if you need a more detailed explanation.
Michael C
3,230 PointsMeh nvm these little things are nothing compared to the positive aspects u guys deliver
Craig Dennis
Treehouse TeacherK, it's fixed now to allow peeking and using isEmpty. Thanks for uncovering the bug!
J.D. Sandifer
18,813 PointsCraig, shouldn't this work, too? It compiled and seems supported in the Java Docs.
while(mSupportReps.size() == 0){
playHoldMusic();
}
Michael C
3,230 PointsMichael C
3,230 PointsThanks bro...actually I thought that couldn't be the problem because semantically the result would be the same...that's what I thought... seems that a "HINT" is actually an objective for the challenge
Craig Dennis
Treehouse TeacherCraig Dennis
Treehouse TeacherDoh you broke my mock! I'll fix it, your code was correct! Thanks for the patience!