/*
* Copyright 2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.statemachine.event;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.notNullValue;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.Message;
import org.springframework.statemachine.AbstractStateMachineTests;
import org.springframework.statemachine.ObjectStateMachine;
import org.springframework.statemachine.StateMachineSystemConstants;
import org.springframework.statemachine.config.EnableStateMachine;
import org.springframework.statemachine.config.EnumStateMachineConfigurerAdapter;
import org.springframework.statemachine.config.builders.StateMachineStateConfigurer;
import org.springframework.statemachine.config.builders.StateMachineTransitionConfigurer;
import org.springframework.statemachine.listener.StateMachineListenerAdapter;
/**
* Tests from state machine app context events.
*
* @author Janne Valkealahti
*
*/
public class StateMachineEventTests extends AbstractStateMachineTests {
@Override
protected AnnotationConfigApplicationContext buildContext() {
return new AnnotationConfigApplicationContext();
}
@Test
public void testContextEvents() throws Exception {
context.register(BaseConfig.class, Config1.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
TestEventListener listener = context.getBean(TestEventListener.class);
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
machine.start();
assertThat(machine, notNullValue());
machine.sendEvent(TestEvents.E1);
machine.sendEvent(TestEvents.E2);
machine.sendEvent(TestEvents.E3);
machine.sendEvent(TestEvents.E4);
machine.sendEvent(TestEvents.EF);
// 6 events instead of 5, first one is initial transition
// to SI where source state is null
assertThat(listener.onEventLatch.await(5, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedEvents.size(), is(6));
}
@Test
public void testEventNotAccepted() throws Exception {
context.register(BaseConfig.class, Config1.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
TestEventListener eventListener = context.getBean(TestEventListener.class);
TestListener listener = new TestListener();
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
eventListener.reset(2, 0);
machine.addStateListener(listener);
machine.start();
assertThat(machine, notNullValue());
machine.sendEvent(TestEvents.E1);
assertThat(eventListener.onEventLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(eventListener.stateChangedEvents.size(), is(2));
eventListener.reset(0, 1);
machine.sendEvent(TestEvents.E3);
assertThat(eventListener.onEventLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(eventListener.eventNotAcceptedEvents.size(), is(1));
assertThat(eventListener.eventNotAcceptedEvents.get(0), instanceOf(OnEventNotAcceptedEvent.class));
assertThat(((OnEventNotAcceptedEvent)eventListener.eventNotAcceptedEvents.get(0)).getEvent().getPayload(), is(TestEvents.E3));
assertThat(listener.eventNotAcceptedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.eventNotAccepted.size(), is(1));
}
@Test
public void testSubmachineHandlesEvent() throws Exception {
context.register(BaseConfig.class, Config2.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
machine.start();
assertThat(machine, notNullValue());
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S10));
machine.sendEvent(TestEvents.E1);
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S12));
}
@Test
public void testEventNotAcceptedS1() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
listener.reset(1);
boolean accepted = machine.sendEvent(TestEvents.E2);
assertThat(accepted, is(false));
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
assertThat(listener.eventNotAcceptedLatch.await(1, TimeUnit.SECONDS), is(true));
assertThat(listener.eventNotAccepted.size(), is(1));
}
@Test
public void testEventAcceptedS1() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
listener.reset(1);
boolean accepted = machine.sendEvent(TestEvents.E1);
assertThat(accepted, is(true));
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
assertThat(listener.eventNotAcceptedLatch.await(1, TimeUnit.SECONDS), is(false));
assertThat(listener.eventNotAccepted.size(), is(0));
}
@Test
public void testEventAcceptedS1NoS1Transition() throws Exception {
context.register(BaseConfig.class, Config4.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
listener.reset(1);
boolean accepted = machine.sendEvent(TestEvents.E1);
assertThat(accepted, is(true));
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
assertThat(listener.eventNotAcceptedLatch.await(1, TimeUnit.SECONDS), is(false));
assertThat(listener.eventNotAccepted.size(), is(0));
}
@Test
public void testEventAcceptedS1GuardAllow() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
machine.getExtendedState().getVariables().put("S1E1", true);
listener.reset(1);
boolean accepted = machine.sendEvent(TestEvents.E1);
assertThat(accepted, is(true));
assertThat(machine.getState().getIds(), contains(TestStates.S2));
assertThat(listener.eventNotAcceptedLatch.await(1, TimeUnit.SECONDS), is(false));
assertThat(listener.eventNotAccepted.size(), is(0));
}
@Test
public void testEventAcceptedS11GuardAllow() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
machine.getExtendedState().getVariables().put("S11E1", true);
listener.reset(1);
boolean accepted = machine.sendEvent(TestEvents.E1);
assertThat(accepted, is(true));
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S12));
assertThat(listener.eventNotAcceptedLatch.await(1, TimeUnit.SECONDS), is(false));
assertThat(listener.eventNotAccepted.size(), is(0));
}
@Test
public void testEventAcceptedS111GuardAllow() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
assertTrue(context.containsBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE));
@SuppressWarnings("unchecked")
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S111));
machine.getExtendedState().getVariables().put("S111E1", true);
listener.reset(1);
boolean accepted = machine.sendEvent(TestEvents.E1);
assertThat(accepted, is(true));
assertThat(machine.getState().getIds(), contains(TestStates.S1, TestStates.S11, TestStates.S112));
assertThat(listener.eventNotAcceptedLatch.await(1, TimeUnit.SECONDS), is(false));
assertThat(listener.eventNotAccepted.size(), is(0));
}
@Configuration
@EnableStateMachine
static class Config1 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.SI)
.states(EnumSet.allOf(TestStates.class))
.end(TestStates.SF);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.SI)
.target(TestStates.S1)
.event(TestEvents.E1)
.and()
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E2)
.and()
.withExternal()
.source(TestStates.S2)
.target(TestStates.S3)
.event(TestEvents.E3)
.and()
.withExternal()
.source(TestStates.S3)
.target(TestStates.S4)
.event(TestEvents.E4)
.and()
.withExternal()
.source(TestStates.S4)
.target(TestStates.SF)
.event(TestEvents.EF);
}
@Bean
public TestEventListener testEventListener() {
return new TestEventListener();
}
}
@Configuration
@EnableStateMachine
static class Config2 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S1)
.and()
.withStates()
.parent(TestStates.S1)
.initial(TestStates.S10)
.state(TestStates.S10)
.state(TestStates.S11)
.state(TestStates.S12)
.state(TestStates.S13);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S10)
.target(TestStates.S11)
.event(TestEvents.E1)
.and()
.withExternal()
.state(TestStates.S1)
.source(TestStates.S10)
.target(TestStates.S12)
.event(TestEvents.E1)
.and()
.withExternal()
.state(TestStates.S1)
.source(TestStates.S10)
.target(TestStates.S13)
.event(TestEvents.E2);
}
}
@Configuration
@EnableStateMachine
static class Config3 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S2)
.and()
.withStates()
.parent(TestStates.S1)
.initial(TestStates.S11)
.state(TestStates.S12)
.and()
.withStates()
.parent(TestStates.S11)
.initial(TestStates.S111)
.state(TestStates.S112);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E1)
.guardExpression("extendedState.variables.containsKey('S1E1')")
.and()
.withExternal()
.source(TestStates.S11)
.target(TestStates.S12)
.event(TestEvents.E1)
.guardExpression("extendedState.variables.containsKey('S11E1')")
.and()
.withExternal()
.source(TestStates.S111)
.target(TestStates.S112)
.event(TestEvents.E1)
.guardExpression("extendedState.variables.containsKey('S111E1')");
}
}
@Configuration
@EnableStateMachine
static class Config4 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S2)
.and()
.withStates()
.parent(TestStates.S1)
.initial(TestStates.S11)
.state(TestStates.S12)
.and()
.withStates()
.parent(TestStates.S11)
.initial(TestStates.S111)
.state(TestStates.S112);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S11)
.target(TestStates.S12)
.event(TestEvents.E1)
.guardExpression("extendedState.variables.containsKey('S11E1')")
.and()
.withExternal()
.source(TestStates.S111)
.target(TestStates.S112)
.event(TestEvents.E1)
.guardExpression("extendedState.variables.containsKey('S111E1')");
}
}
static class TestEventListener implements ApplicationListener<StateMachineEvent> {
volatile CountDownLatch onEventLatch = new CountDownLatch(6);
volatile ArrayList<StateMachineEvent> stateChangedEvents = new ArrayList<StateMachineEvent>();
volatile ArrayList<StateMachineEvent> eventNotAcceptedEvents = new ArrayList<StateMachineEvent>();
@Override
public void onApplicationEvent(StateMachineEvent event) {
if (event instanceof OnStateChangedEvent) {
stateChangedEvents.add(event);
onEventLatch.countDown();
} else if (event instanceof OnEventNotAcceptedEvent) {
eventNotAcceptedEvents.add(event);
onEventLatch.countDown();
}
}
public void reset(int c1,int c2) {
onEventLatch = new CountDownLatch(c1);
eventNotAcceptedEvents = new ArrayList<StateMachineEvent>();
stateChangedEvents.clear();
eventNotAcceptedEvents.clear();
}
}
static class TestListener extends StateMachineListenerAdapter<TestStates, TestEvents> {
volatile CountDownLatch eventNotAcceptedLatch = new CountDownLatch(1);
volatile ArrayList<Message<TestEvents>> eventNotAccepted = new ArrayList<Message<TestEvents>>();
@Override
public void eventNotAccepted(Message<TestEvents> event) {
eventNotAccepted.add(event);
eventNotAcceptedLatch.countDown();
}
public void reset(int c1) {
eventNotAcceptedLatch = new CountDownLatch(c1);
eventNotAccepted.clear();
}
}
}