TTL, creating user and its function

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We are doing a school project and have a question:



If we want to create a new user it wasn't possible for the user to login right after. Therefore we decided to change the TTL to 5S but it might not be the right solution.



At the moment our UserCache look like this with a TTL stored in our config.json to 5S.



Our concern is that it's not the right call. So what does the TTL do in proportion to the UserCache? And what might the right solution be? We just started coding..



Best regards,
Casper



//TODO: Build this cache and use it. (FIXED)
public class UserCache {



// List of users
private ArrayList<User> users;

// Time cache should live. Definere en variabel vi kalder ttl.
private long ttl;

// Sets when the cache has been created
private long created;

// Vi har her lavet en konstruktør, hvor vi henter alle brugerne fra config klassen
public UserCache() {
this.ttl = Config.getUserTtl();
}

public ArrayList<User> getUsers(Boolean forceUpdate) {

// If we wish to clear cache, we can set force update.
// Otherwise we look at the age of the cache and figure out if we should update.
// If the list is empty we also check for new products
if (forceUpdate
|| ((this.created + this.ttl) <= (System.currentTimeMillis() / 1000L))
|| this.users.isEmpty()) {

// Get users from controller, since we wish to update.
ArrayList<User> users = UserController.getUsers();

// Set users for the instance and set created timestamp
this.users = users;
this.created = System.currentTimeMillis() / 1000L;
}

// Return the documents
return this.users;
}


}










share|improve this question





























    0















    We are doing a school project and have a question:



    If we want to create a new user it wasn't possible for the user to login right after. Therefore we decided to change the TTL to 5S but it might not be the right solution.



    At the moment our UserCache look like this with a TTL stored in our config.json to 5S.



    Our concern is that it's not the right call. So what does the TTL do in proportion to the UserCache? And what might the right solution be? We just started coding..



    Best regards,
    Casper



    //TODO: Build this cache and use it. (FIXED)
    public class UserCache {



    // List of users
    private ArrayList<User> users;

    // Time cache should live. Definere en variabel vi kalder ttl.
    private long ttl;

    // Sets when the cache has been created
    private long created;

    // Vi har her lavet en konstruktør, hvor vi henter alle brugerne fra config klassen
    public UserCache() {
    this.ttl = Config.getUserTtl();
    }

    public ArrayList<User> getUsers(Boolean forceUpdate) {

    // If we wish to clear cache, we can set force update.
    // Otherwise we look at the age of the cache and figure out if we should update.
    // If the list is empty we also check for new products
    if (forceUpdate
    || ((this.created + this.ttl) <= (System.currentTimeMillis() / 1000L))
    || this.users.isEmpty()) {

    // Get users from controller, since we wish to update.
    ArrayList<User> users = UserController.getUsers();

    // Set users for the instance and set created timestamp
    this.users = users;
    this.created = System.currentTimeMillis() / 1000L;
    }

    // Return the documents
    return this.users;
    }


    }










    share|improve this question

























      0












      0








      0








      We are doing a school project and have a question:



      If we want to create a new user it wasn't possible for the user to login right after. Therefore we decided to change the TTL to 5S but it might not be the right solution.



      At the moment our UserCache look like this with a TTL stored in our config.json to 5S.



      Our concern is that it's not the right call. So what does the TTL do in proportion to the UserCache? And what might the right solution be? We just started coding..



      Best regards,
      Casper



      //TODO: Build this cache and use it. (FIXED)
      public class UserCache {



      // List of users
      private ArrayList<User> users;

      // Time cache should live. Definere en variabel vi kalder ttl.
      private long ttl;

      // Sets when the cache has been created
      private long created;

      // Vi har her lavet en konstruktør, hvor vi henter alle brugerne fra config klassen
      public UserCache() {
      this.ttl = Config.getUserTtl();
      }

      public ArrayList<User> getUsers(Boolean forceUpdate) {

      // If we wish to clear cache, we can set force update.
      // Otherwise we look at the age of the cache and figure out if we should update.
      // If the list is empty we also check for new products
      if (forceUpdate
      || ((this.created + this.ttl) <= (System.currentTimeMillis() / 1000L))
      || this.users.isEmpty()) {

      // Get users from controller, since we wish to update.
      ArrayList<User> users = UserController.getUsers();

      // Set users for the instance and set created timestamp
      this.users = users;
      this.created = System.currentTimeMillis() / 1000L;
      }

      // Return the documents
      return this.users;
      }


      }










      share|improve this question














      We are doing a school project and have a question:



      If we want to create a new user it wasn't possible for the user to login right after. Therefore we decided to change the TTL to 5S but it might not be the right solution.



      At the moment our UserCache look like this with a TTL stored in our config.json to 5S.



      Our concern is that it's not the right call. So what does the TTL do in proportion to the UserCache? And what might the right solution be? We just started coding..



      Best regards,
      Casper



      //TODO: Build this cache and use it. (FIXED)
      public class UserCache {



      // List of users
      private ArrayList<User> users;

      // Time cache should live. Definere en variabel vi kalder ttl.
      private long ttl;

      // Sets when the cache has been created
      private long created;

      // Vi har her lavet en konstruktør, hvor vi henter alle brugerne fra config klassen
      public UserCache() {
      this.ttl = Config.getUserTtl();
      }

      public ArrayList<User> getUsers(Boolean forceUpdate) {

      // If we wish to clear cache, we can set force update.
      // Otherwise we look at the age of the cache and figure out if we should update.
      // If the list is empty we also check for new products
      if (forceUpdate
      || ((this.created + this.ttl) <= (System.currentTimeMillis() / 1000L))
      || this.users.isEmpty()) {

      // Get users from controller, since we wish to update.
      ArrayList<User> users = UserController.getUsers();

      // Set users for the instance and set created timestamp
      this.users = users;
      this.created = System.currentTimeMillis() / 1000L;
      }

      // Return the documents
      return this.users;
      }


      }







      caching ttl






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      asked Jan 3 at 21:24









      Casper Siegumfeldt ClausenCasper Siegumfeldt Clausen

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