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Thread: how to return an alert true if the server is functioning normally

  1. #1
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    Cool how to return an alert true if the server is functioning normally

    So, I don't know how to start off this program. I'm not looking for the final answer, but I don't know two things: 1. the objective, 2. what type of thing do I start it off with? A method? I'm pretty sure it's not a class right because it already has a class?

     
    public class WebFarm 
    { 
      private ArrayList<Server> servers; 
     
      /* constructors and other methods and instance variables not shown */ 
    } 
     
    public class Server 
    { 
      public String ipAddress() { /* implementation not shown */ } 
     
      public boolean ping() { /* implementation not shown */ } 
     
      /* constructors and other methods and instance variables not shown */ 
    }

    the Instructions:

    The ping() method of the Server class returns true if the server is currently functioning normally; otherwise it returns false. Write a definition for the needsAttention() method of WebFarm that returns an ArrayList containing the servers that are not functioning normally:

     
    public ArrayList<Server> needsAttention() 
    { 
     
    //I can put code here
     
    }

    Again, I don't know how to start off the code. If anyone could give me enough info that I could put something to edit and work off of, I'd love that. Thanks.


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    Default Re: how to return an alert true if the server is functioning normally

    Hello.

    Well this sounds alot like a typical school exercise.

    So your goal is to make the implementation of the needsAttention() method. Since so little of the inner workings are given, you have to assume that the WebFarm's servers -array list contains a list of
    Server class instances that you have to run through, ping each and return a list of those of which returned false.

    In all simplicity, in pseudo code, something like this:

    public ArrayList<Server> needsAttention() 
    { 
    make a list to store the failed servers
    loop trough the server instances {
       if ( currentServer.ping() == false ) {
           add currentServer to failedServersList }
    return failedServers
    }
     
    }

    So thats the idea. Dont know why the ipAddress -method is given. Maybe it is to be used in a later example? Anyhow, hope you got the drift and good luck with the homework

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    Default Re: how to return an alert true if the server is functioning normally

    Does that mean like this?

    for (int i = 0; i < Server.length()-1; i++){
     
        if ( currentServer.ping() == false ) {
     
        add currentServer to failedServersList; 
     
    }
     
        return failedServers;
     
    }

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