From 675fdf07de8ff426be30bf8cac1616f7944f9f06 Mon Sep 17 00:00:00 2001
From: Vincent Privat <vincent.privat@gmail.com>
Date: Thu, 14 Mar 2019 19:00:27 +0100
Subject: [PATCH] Add new method isStateMachineManaged

Determines if the given machine identifier denotes a known managed state machine.
---
 .../service/DefaultStateMachineService.java          | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/spring-statemachine-core/src/main/java/org/springframework/statemachine/service/DefaultStateMachineService.java b/spring-statemachine-core/src/main/java/org/springframework/statemachine/service/DefaultStateMachineService.java
index 3bd42519..40b3f729 100644
--- a/spring-statemachine-core/src/main/java/org/springframework/statemachine/service/DefaultStateMachineService.java
+++ b/spring-statemachine-core/src/main/java/org/springframework/statemachine/service/DefaultStateMachineService.java
@@ -128,6 +128,18 @@ public class DefaultStateMachineService<S, E> implements StateMachineService<S,
 		}
 	}
 
+	/**
+	 * Determines if the given machine identifier denotes a known managed state machine.
+	 *
+	 * @param machineId machine identifier
+	 * @return true if machineId denotes a known managed state machine currently in memory
+	 */
+	public boolean hasStateMachine(String machineId) {
+		synchronized (machines) {
+			return machines.containsKey(machineId);
+		}
+	}
+
 	/**
 	 * Sets the state machine persist.
 	 *