/*
* 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.state;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.notNullValue;
import static org.junit.Assert.assertThat;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
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.StateMachine;
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;
import org.springframework.statemachine.support.StateMachineInterceptorAdapter;
import org.springframework.statemachine.transition.Transition;
public class JoinStateTests extends AbstractStateMachineTests {
@Override
protected AnnotationConfigApplicationContext buildContext() {
return new AnnotationConfigApplicationContext();
}
@Test
@SuppressWarnings("unchecked")
public void testJoin() throws Exception {
context.register(BaseConfig.class, Config1.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
listener.reset(1);
assertThat(machine, notNullValue());
machine.start();
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.S4));
}
@Test
@SuppressWarnings("unchecked")
public void testJoinLoopTwice() throws Exception {
context.register(BaseConfig.class, Config1.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
assertThat(machine, notNullValue());
machine.start();
machine.sendEvent(TestEvents.E1);
machine.sendEvent(TestEvents.E2);
machine.sendEvent(TestEvents.E3);
assertThat(machine.getState().getIds(), contains(TestStates.S4));
listener.reset(1);
machine.sendEvent(TestEvents.E4);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
assertThat(machine.getState().getIds(), contains(TestStates.SI));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
assertThat(machine.getState().getIds(), containsInAnyOrder(TestStates.S2, TestStates.S20, TestStates.S30));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.S4));
}
@Test
@SuppressWarnings("unchecked")
public void testJoinSuper() throws Exception {
context.register(BaseConfig.class, Config2.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
listener.reset(1);
assertThat(machine, notNullValue());
machine.start();
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.S4));
}
@Test
@SuppressWarnings("unchecked")
public void testJoinSuperLoopTwice() throws Exception {
context.register(BaseConfig.class, Config2.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
assertThat(machine, notNullValue());
machine.start();
machine.sendEvent(TestEvents.E1);
machine.sendEvent(TestEvents.E2);
machine.sendEvent(TestEvents.E3);
assertThat(machine.getState().getIds(), contains(TestStates.S4));
listener.reset(1);
machine.sendEvent(TestEvents.E4);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
assertThat(machine.getState().getIds(), contains(TestStates.SI));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.S4));
}
@Test
@SuppressWarnings("unchecked")
public void testMultiJoin1() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
listener.reset(1);
assertThat(machine, notNullValue());
machine.start();
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.S4));
}
@Test
@SuppressWarnings("unchecked")
public void testMultiJoin2() throws Exception {
context.register(BaseConfig.class, Config3.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
listener.reset(1);
assertThat(machine, notNullValue());
machine.start();
machine.getExtendedState().getVariables().put("foo", "bar");
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.SF));
}
@Test
@SuppressWarnings("unchecked")
public void testInterceptorPostStateChangeTransitionNotNull() throws Exception {
context.register(BaseConfig.class, Config1.class);
context.refresh();
ObjectStateMachine<TestStates,TestEvents> machine =
context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, ObjectStateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
final AtomicBoolean nullCheck = new AtomicBoolean(false);
machine.addStateMachineInterceptor(new StateMachineInterceptorAdapter<TestStates,TestEvents>() {
@Override
public void postStateChange(State<TestStates, TestEvents> state, Message<TestEvents> message,
Transition<TestStates, TestEvents> transition, StateMachine<TestStates, TestEvents> stateMachine) {
if (state.getId() == TestStates.S4) {
nullCheck.set(transition == null);
}
super.postStateChange(state, message, transition, stateMachine);
}
});
listener.reset(1);
assertThat(machine, notNullValue());
machine.start();
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(3);
machine.sendEvent(TestEvents.E1);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(3));
listener.reset(1);
machine.sendEvent(TestEvents.E2);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(1));
listener.reset(2);
machine.sendEvent(TestEvents.E3);
assertThat(listener.stateChangedLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.stateChangedCount, is(2));
assertThat(machine.getState().getIds(), contains(TestStates.S4));
assertThat("Interceptor postStateChange has null transition", nullCheck.get(), is(false));
}
@Configuration
@EnableStateMachine
static class Config1 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.SI)
.state(TestStates.S2)
.join(TestStates.S3)
.state(TestStates.S4)
.and()
.withStates()
.parent(TestStates.S2)
.initial(TestStates.S20)
.state(TestStates.S20)
.state(TestStates.S21)
.and()
.withStates()
.parent(TestStates.S2)
.initial(TestStates.S30)
.state(TestStates.S30)
.state(TestStates.S31);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.SI)
.target(TestStates.S2)
.event(TestEvents.E1)
.and()
.withExternal()
.source(TestStates.S20)
.target(TestStates.S21)
.event(TestEvents.E2)
.and()
.withExternal()
.source(TestStates.S30)
.target(TestStates.S31)
.event(TestEvents.E3)
.and()
.withJoin()
.source(TestStates.S21)
.source(TestStates.S31)
.target(TestStates.S3)
.and()
.withExternal()
.source(TestStates.S3)
.target(TestStates.S4)
.and()
.withExternal()
.source(TestStates.S4)
.target(TestStates.SI)
.event(TestEvents.E4);
}
}
@Configuration
@EnableStateMachine
static class Config2 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.SI)
.state(TestStates.S2)
.join(TestStates.S3)
.state(TestStates.S4)
.and()
.withStates()
.parent(TestStates.S2)
.initial(TestStates.S20)
.end(TestStates.S21)
.and()
.withStates()
.parent(TestStates.S2)
.initial(TestStates.S30)
.end(TestStates.S31);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.SI)
.target(TestStates.S2)
.event(TestEvents.E1)
.and()
.withExternal()
.source(TestStates.S20)
.target(TestStates.S21)
.event(TestEvents.E2)
.and()
.withExternal()
.source(TestStates.S30)
.target(TestStates.S31)
.event(TestEvents.E3)
.and()
.withJoin()
.source(TestStates.S2)
.target(TestStates.S3)
.and()
.withExternal()
.source(TestStates.S3)
.target(TestStates.S4)
.and()
.withExternal()
.source(TestStates.S4)
.target(TestStates.SI)
.event(TestEvents.E4);
}
}
@Configuration
@EnableStateMachine
static class Config3 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.SI)
.state(TestStates.S2)
.join(TestStates.S3)
.state(TestStates.SF)
.state(TestStates.S4)
.and()
.withStates()
.parent(TestStates.S2)
.initial(TestStates.S20)
.end(TestStates.S21)
.and()
.withStates()
.parent(TestStates.S2)
.initial(TestStates.S30)
.end(TestStates.S31);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.SI)
.target(TestStates.S2)
.event(TestEvents.E1)
.and()
.withExternal()
.source(TestStates.S20)
.target(TestStates.S21)
.event(TestEvents.E2)
.and()
.withExternal()
.source(TestStates.S30)
.target(TestStates.S31)
.event(TestEvents.E3)
.and()
.withJoin()
.source(TestStates.S2)
.target(TestStates.S3)
.and()
.withExternal()
.source(TestStates.S3)
.target(TestStates.SF)
.guardExpression("!extendedState.variables.isEmpty()")
.and()
.withExternal()
.source(TestStates.S3)
.target(TestStates.S4)
.guardExpression("extendedState.variables.isEmpty()")
.and()
.withExternal()
.source(TestStates.S4)
.target(TestStates.SI)
.event(TestEvents.E4);
}
}
private static class TestListener extends StateMachineListenerAdapter<TestStates, TestEvents> {
volatile CountDownLatch stateChangedLatch = new CountDownLatch(1);
volatile CountDownLatch transitionLatch = new CountDownLatch(0);
volatile int stateChangedCount = 0;
final List<Transition<TestStates, TestEvents>> transitions = new ArrayList<Transition<TestStates,TestEvents>>();
@Override
public void stateChanged(State<TestStates, TestEvents> from, State<TestStates, TestEvents> to) {
stateChangedCount++;
stateChangedLatch.countDown();
}
@Override
public void transition(Transition<TestStates, TestEvents> transition) {
transitions.add(transition);
transitionLatch.countDown();
}
public void reset(int c1) {
reset(c1, 0);
}
public void reset(int c1, int c2) {
stateChangedLatch = new CountDownLatch(c1);
transitionLatch = new CountDownLatch(c2);
stateChangedCount = 0;
transitions.clear();
}
}
}