/*
* Copyright 2016 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.action;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.hamcrest.Matchers.nullValue;
import static org.junit.Assert.assertThat;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.statemachine.AbstractStateMachineTests;
import org.springframework.statemachine.StateContext;
import org.springframework.statemachine.StateMachine;
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.state.State;
public class ActionAndTimerTests extends AbstractStateMachineTests {
@SuppressWarnings("unchecked")
@Test
public void testExitActionWithTimerOnce() throws Exception {
context.register(Config1.class);
context.refresh();
StateMachine<TestStates, TestEvents> machine = context.getBean(StateMachine.class);
TestTimerAction testTimerAction = context.getBean(TestTimerAction.class);
TestExitAction testExitAction = context.getBean(TestExitAction.class);
TestListener testListener = new TestListener();
machine.addStateListener(testListener);
machine.start();
assertThat(machine.getState().getIds(), containsInAnyOrder(TestStates.S1));
machine.sendEvent(TestEvents.E1);
assertThat(machine.getState().getIds(), containsInAnyOrder(TestStates.S2));
// sleep so that action with timerOnce(1000) is fired before event is send
// event sending is happening on a main thread, but actions are executed on a same
// pool than the DefaultStateMachineExecutor is using. existing action execution is interrupted.
Thread.sleep(2000);
machine.sendEvent(TestEvents.E2);
assertThat(testListener.s3EnteredLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(machine.getState().getIds(), containsInAnyOrder(TestStates.S3));
assertThat(testTimerAction.latch.await(2, TimeUnit.SECONDS), is(true));
assertThat(testTimerAction.e, nullValue());
assertThat(testExitAction.latch.await(2, TimeUnit.SECONDS), is(true));
assertThat(testExitAction.e, nullValue());
}
@Configuration
@EnableStateMachine
static class Config1 extends EnumStateMachineConfigurerAdapter<TestStates, TestEvents> {
@Override
public void configure(StateMachineStateConfigurer<TestStates, TestEvents> states) throws Exception {
states
.withStates()
.initial(TestStates.S1)
.state(TestStates.S2, null, testExitAction())
.state(TestStates.S3);
}
@Override
public void configure(StateMachineTransitionConfigurer<TestStates, TestEvents> transitions) throws Exception {
transitions
.withExternal()
.source(TestStates.S1)
.target(TestStates.S2)
.event(TestEvents.E1)
.and()
.withExternal()
.source(TestStates.S2)
.target(TestStates.S3)
.event(TestEvents.E2)
.and()
.withInternal()
.source(TestStates.S2)
.action(testTimerAction())
.timerOnce(1000);
}
@Bean
public TestExitAction testExitAction() {
return new TestExitAction();
}
@Bean
public TestTimerAction testTimerAction() {
return new TestTimerAction();
}
}
private static class TestListener extends StateMachineListenerAdapter<TestStates, TestEvents> {
volatile CountDownLatch s3EnteredLatch = new CountDownLatch(1);
@Override
public void stateEntered(State<TestStates, TestEvents> state) {
if (state.getId().equals(TestStates.S3)) {
s3EnteredLatch.countDown();
}
}
}
private static class TestTimerAction implements Action<TestStates, TestEvents> {
volatile CountDownLatch latch = new CountDownLatch(1);
volatile Exception e;
@Override
public void execute(StateContext<TestStates, TestEvents> context) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
this.e = e;
} finally {
latch.countDown();
}
}
}
private static class TestExitAction implements Action<TestStates, TestEvents> {
volatile CountDownLatch latch = new CountDownLatch(1);
volatile Exception e;
@Override
public void execute(StateContext<TestStates, TestEvents> context) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
this.e = e;
} finally {
latch.countDown();
}
}
}
@Override
protected AnnotationConfigApplicationContext buildContext() {
return new AnnotationConfigApplicationContext();
}
}