Updates to docs

spring-statemachine-samples/src/main/java/demo/AbstractStateMachineCommands.java

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+package demo;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.shell.core.CommandMarker;
+import org.springframework.shell.core.annotation.CliCommand;
+import org.springframework.statemachine.StateMachine;
+import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
+
+@Component
+public class AbstractStateMachineCommands<S, E> implements CommandMarker {
+
+	@Autowired
+	private StateMachine<S, E> stateMachine;
+
+	protected StateMachine<S, E> getStateMachine() {
+		return stateMachine;
+	}
+
+	@Autowired
+	@Qualifier("stateChartModel")
+	private String stateChartModel;
+
+	@CliCommand(value = "sm state", help = "Prints state machine state")
+	public String state() {
+		return StringUtils.collectionToCommaDelimitedString(stateMachine.getState().getIds());
+	}
+
+	@CliCommand(value = "sm start", help = "Start a state machine")
+	public String start() {
+		stateMachine.start();
+		return "State machine started";
+	}
+
+	@CliCommand(value = "sm stop", help = "Stop a state machine")
+	public String stop() {
+		stateMachine.stop();
+		return "State machine stopped";
+	}
+
+	@CliCommand(value = "sm print", help = "Print state machine")
+	public String print() {
+		return stateChartModel;
+	}
+
+}