Design Pattern: Do While

[rlkoshak (Rich Koshak)]

Design Pattern: What is a Design Pattern and How Do I Use Them

Edit: Updates for OH 4. What Is a Design Pattern (DP) [image] A DP is a concept borrowed from software engineering that is in turn borrowed from architecture. A DP is a general and reusable solution to a common problem. But the solution is not complete. Instead it is a template that one can apply to a lot of different situations with minor modifications and customizations. The DPs posted to this forum will usually include a complete solution as an example implementation of the DP. But do not …

Problem Statement

Sometimes a user wants to perform some sort of action or activate polling during a certain period of time after another event occurs.

This Design Pattern is deprecated. Please see Design Pattern: Looping Timers for a better approach.

[ThomDietrich]

@rlkoshak

val start = now

Why not more efficiently val end = now.plusMinutes(10)?

[rlkoshak (Rich Koshak)]

Because I was in a hurry and clearly didn’t think it through.

That is better. Editing the original.

[mrfrh (Martin)]

@rlkoshak

val end= now.plusMinutes(10)

This always gave me syntax errors, as “end” is a reserved keyword? I ended up using another name for the variable “end”, then the example works fine.

[rlkoshak (Rich Koshak)]

Thanks, but really I should remove Example 2. You should not have a long running Rule like that. It can be really bad. Use Design Pattern: Looping Timers instead.