Added isActive method

.gitignore

@@ -2,3 +2,5 @@ target
 .project
 .classpath
 .settings
+.idea
+*.iml

src/main/java/redis/embedded/RedisServer.java

@@ -49,7 +49,7 @@ public static String getRedisRunScript() {
 	private final File command;
 	private final Integer port;
 
-	private boolean active = false;
+	private volatile boolean active = false;
 	private Process redisProcess;
 
 	public RedisServer(File command, Integer port) {
@@ -73,16 +73,19 @@ private File extractExecutableFromJar(String scriptName) throws IOException {
 
 		return command;
 	}
+
+	public boolean isActive() {
+		return active;
+	}
 
 	public synchronized void start() throws IOException {
 		if (active) {
 			throw new RuntimeException("This redis server instance is already running...");
 		}
 
 		redisProcess = createRedisProcessBuilder().start();
-		active = true;
-
 		awaitRedisServerReady();
+		active = true;
 	}
 
 	private void awaitRedisServerReady() throws IOException {