Update docs

- Relates to #194

docs/src/reference/asciidoc/sm.adoc

@@ -265,6 +265,7 @@ Otherwise configuration is ill-formed.
 include::samples/DocsConfigurationSampleTests.java[tags=snippetS]
 ----
 
+[[statemachine-config-states-junction]]
 ==== Junction State
 Junction needs to be defined in both states and transitions to work
 properly. Mark particular state as choice state by using `junction()`
@@ -325,6 +326,21 @@ states from a regions.
 include::samples/DocsConfigurationSampleTests.java[tags=snippetU]
 ----
 
+[[statemachine-config-states-exitentry]]
+==== Exit/Entry Point States
+Exit and Entry Points can be used to do more controlled exit and entry
+from and into a submachines.
+
+[source,java,indent=0]
+----
+include::samples/DocsConfigurationSampleTests.java[tags=snippetUU]
+----
+
+As shown above you need to mark particular states as _exit_ and
+_entry_ states. Then you create a normal transitions into those states
+and also specify _withExit()_ and _withEntry()_ where those states
+will exit and entry respectively.
+
 [[statemachine-config-commonsettings]]
 === Configuring Common Settings
 Some of a common state machine configuration can be set via a

docs/src/reference/asciidoc/whatsnew.adoc

@@ -16,6 +16,8 @@ interoperability with web applications.
   <<sm-persist-statemachinepersister>>.
 * Configuration model classes are now a public API.
 * New features in timer based events.
+* New _Junction_ pseudostate <<statemachine-config-states-junction>>.
+* New _Exit Point_ and _Entry Point_ pseudostates <<statemachine-config-states-exitentry>>.
 * Configuration model verifier.
 * New samples, <<statemachine-examples-security>>, <<statemachine-examples-eventservice>>.
 * UI modeling support using Eclipse Papyrus, <<sm-papyrus>>.

spring-statemachine-core/src/test/java/org/springframework/statemachine/docs/DocsConfigurationSampleTests.java

@@ -753,6 +753,54 @@ public class DocsConfigurationSampleTests extends AbstractStateMachineTests {
 	}
 // end::snippetU[]
 
+// tag::snippetUU[]
+	@Configuration
+	@EnableStateMachine
+	static class Config21 extends StateMachineConfigurerAdapter<String, String> {
+
+		@Override
+		public void configure(StateMachineStateConfigurer<String, String> states)
+				throws Exception {
+			states
+			.withStates()
+				.initial("S1")
+				.state("S2")
+				.state("S3")
+				.and()
+				.withStates()
+					.parent("S2")
+					.initial("S21")
+					.entry("S2ENTRY")
+					.exit("S2EXIT")
+					.state("S22");
+		}
+
+		@Override
+		public void configure(StateMachineTransitionConfigurer<String, String> transitions)
+				throws Exception {
+			transitions
+			.withExternal()
+				.source("S1").target("S2")
+				.event("E1")
+				.and()
+			.withExternal()
+				.source("S1").target("S2ENTRY")
+				.event("ENTRY")
+				.and()
+			.withExternal()
+				.source("S22").target("S2EXIT")
+				.event("EXIT")
+				.and()
+			.withEntry()
+				.source("S2ENTRY").target("S22")
+				.and()
+			.withExit()
+				.source("S2EXIT").target("S3");
+		}
+	}
+
+// end::snippetUU[]
+
 	@Configuration
 	@EnableStateMachine
 	public class Config16