Initial commit of guarded suspension design pattern

guarded-suspension/README.md

@@ -0,0 +1,21 @@
+---
+layout: pattern
+title: Guarded Suspension
+folder: guarded-suspension
+permalink: /patterns/guarded-suspension/
+pumlid: RScv3SCm3030LU819FRPXg5fIm552tnYPFiyjRi3RkbAaYkdoQr5JBy369vrxz7oaSv6XmPhL3e6TCaJ0msU-CAoilTToyG8DdKOw5z0GzcAlvNAN_WZSD1brBHHPmxv0000
+categories: Concurrency
+tags:
+ - Java
+ - Difficulty-Beginner
+---
+
+## Intent
+Use Guareded suspension pattern to handle a situation when you want to execute a method on object which is not in a proper state.
+![Guarded Suspension diagram](./etc/guarded-suspension.png)
+
+## Applicability
+Use Guareded Suspension pattern when:
+
+* the developer knows that the method execution will be blocked for a finite period of time
+