/*
* Copyright 2015-2016 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.docs;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;
import org.springframework.core.task.SyncTaskExecutor;
import org.springframework.core.task.TaskExecutor;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.statemachine.AbstractStateMachineTests;
import org.springframework.statemachine.StateContext;
import org.springframework.statemachine.StateMachine;
import org.springframework.statemachine.StateMachineSystemConstants;
import org.springframework.statemachine.action.Action;
import org.springframework.statemachine.config.EnableStateMachine;
import org.springframework.statemachine.config.StateMachineBuilder;
import org.springframework.statemachine.config.StateMachineBuilder.Builder;
import org.springframework.statemachine.config.StateMachineConfigurerAdapter;
import org.springframework.statemachine.config.builders.StateMachineConfigurationConfigurer;
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;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
public class DocsConfigurationSampleTests2 extends AbstractStateMachineTests {
@Override
protected AnnotationConfigApplicationContext buildContext() {
return new AnnotationConfigApplicationContext();
}
// tag::snippetA[]
@Configuration
@EnableStateMachine
public class Config2 extends StateMachineConfigurerAdapter<String, String> {
@Override
public void configure(StateMachineStateConfigurer<String, String> states)
throws Exception {
states
.withStates()
.initial("S1")
.state("S2")
.state("S3");
}
@Override
public void configure(StateMachineTransitionConfigurer<String, String> transitions)
throws Exception {
transitions
.withExternal()
.source("S1").target("S2").event("E1")
.and()
.withExternal()
.source("S1").target("S3").event("E2")
.and()
.withInternal()
.source("S2")
.action(timerAction())
.timer(1000)
.and()
.withInternal()
.source("S3")
.action(timerAction())
.timerOnce(1000);
}
@Bean
public TimerAction timerAction() {
return new TimerAction();
}
}
public class TimerAction implements Action<String, String> {
@Override
public void execute(StateContext<String, String> context) {
// do something in every 1 sec
}
}
// end::snippetA[]
// tag::snippetB[]
@Configuration
public class Config3 {
@Bean
@Scope(scopeName="session", proxyMode=ScopedProxyMode.TARGET_CLASS)
StateMachine<String, String> stateMachine() throws Exception {
Builder<String, String> builder = StateMachineBuilder.builder();
builder.configureConfiguration()
.withConfiguration()
.autoStartup(true)
.taskExecutor(new SyncTaskExecutor());
builder.configureStates()
.withStates()
.initial("S1")
.state("S2");
builder.configureTransitions()
.withExternal()
.source("S1")
.target("S2")
.event("E1");
StateMachine<String, String> stateMachine = builder.build();
return stateMachine;
}
}
// end::snippetB[]
// tag::snippetC[]
@Configuration
@EnableStateMachine
@Scope(scopeName="session", proxyMode=ScopedProxyMode.TARGET_CLASS)
public static class Config4 extends StateMachineConfigurerAdapter<String, String> {
@Override
public void configure(StateMachineConfigurationConfigurer<String, String> config) throws Exception {
config
.withConfiguration()
.autoStartup(true);
}
@Override
public void configure(StateMachineStateConfigurer<String, String> states) throws Exception {
states
.withStates()
.initial("S1")
.state("S2");
}
@Override
public void configure(StateMachineTransitionConfigurer<String, String> transitions) throws Exception {
transitions
.withExternal()
.source("S1")
.target("S2")
.event("E1");
}
}
// end::snippetC[]
// tag::snippetD[]
@Controller
public class StateMachineController {
@Autowired
StateMachine<String, String> stateMachine;
@RequestMapping(path="/state", method=RequestMethod.POST)
public HttpEntity<Void> setState(@RequestParam("event") String event) {
stateMachine.sendEvent(event);
return new ResponseEntity<Void>(HttpStatus.ACCEPTED);
}
@RequestMapping(path="/state", method=RequestMethod.GET)
@ResponseBody
public String getState() {
return stateMachine.getState().getId();
}
}
// end::snippetD[]
@Test
public void testConfig51() throws Exception {
context.register(Config5.class, ExecutorConfig.class);
context.refresh();
@SuppressWarnings("unchecked")
StateMachine<String, String> machine = context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, StateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(listener.stateMachineStartedLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(1));
listener.reset(0, 0, 2);
machine.sendEvent("DEPLOY");
machine.sendEvent("DEPLOY");
assertThat(listener.readyStateEnteredLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(2));
}
@Test
public void testConfig52() throws Exception {
context.register(Config5.class);
context.refresh();
@SuppressWarnings("unchecked")
StateMachine<String, String> machine = context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, StateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(listener.stateMachineStartedLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(1));
listener.reset(0, 0, 2);
machine.sendEvent("DEPLOY");
machine.sendEvent("DEPLOY");
assertThat(listener.readyStateEnteredLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(2));
}
@Test
public void testConfig61() throws Exception {
context.register(Config6.class, ExecutorConfig.class);
context.refresh();
@SuppressWarnings("unchecked")
StateMachine<String, String> machine = context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, StateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(listener.stateMachineStartedLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(1));
listener.reset(0, 0, 2);
machine.sendEvent("DEPLOY");
machine.sendEvent("DEPLOY");
assertThat(listener.readyStateEnteredLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(2));
}
@Test
public void testConfig62() throws Exception {
context.register(Config6.class);
context.refresh();
@SuppressWarnings("unchecked")
StateMachine<String, String> machine = context.getBean(StateMachineSystemConstants.DEFAULT_ID_STATEMACHINE, StateMachine.class);
TestListener listener = new TestListener();
machine.addStateListener(listener);
machine.start();
assertThat(listener.stateMachineStartedLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredLatch.await(3, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(1));
listener.reset(0, 0, 2);
machine.sendEvent("DEPLOY");
machine.sendEvent("DEPLOY");
assertThat(listener.readyStateEnteredLatch.await(2, TimeUnit.SECONDS), is(true));
assertThat(listener.readyStateEnteredCount, is(2));
}
@Configuration
static class ExecutorConfig {
@Bean(name=StateMachineSystemConstants.TASK_EXECUTOR_BEAN_NAME)
public TaskExecutor taskExecutor() {
ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
taskExecutor.setCorePoolSize(1);
return taskExecutor;
}
}
// tag::snippetE[]
@Configuration
@EnableStateMachine
static class Config5 extends StateMachineConfigurerAdapter<String, String> {
@Override
public void configure(StateMachineStateConfigurer<String, String> states)
throws Exception {
states
.withStates()
.initial("READY")
.state("DEPLOYPREPARE", "DEPLOY")
.state("DEPLOYEXECUTE", "DEPLOY");
}
@Override
public void configure(StateMachineTransitionConfigurer<String, String> transitions)
throws Exception {
transitions
.withExternal()
.source("READY").target("DEPLOYPREPARE")
.event("DEPLOY")
.and()
.withExternal()
.source("DEPLOYPREPARE").target("DEPLOYEXECUTE")
.and()
.withExternal()
.source("DEPLOYEXECUTE").target("READY");
}
}
// end::snippetE[]
// tag::snippetF[]
@Configuration
@EnableStateMachine
static class Config6 extends StateMachineConfigurerAdapter<String, String> {
@Override
public void configure(StateMachineStateConfigurer<String, String> states)
throws Exception {
states
.withStates()
.initial("READY")
.state("DEPLOY", "DEPLOY")
.state("DONE")
.and()
.withStates()
.parent("DEPLOY")
.initial("DEPLOYPREPARE")
.state("DEPLOYPREPARE", "DONE")
.state("DEPLOYEXECUTE");
}
@Override
public void configure(StateMachineTransitionConfigurer<String, String> transitions)
throws Exception {
transitions
.withExternal()
.source("READY").target("DEPLOY")
.event("DEPLOY")
.and()
.withExternal()
.source("DEPLOYPREPARE").target("DEPLOYEXECUTE")
.and()
.withExternal()
.source("DEPLOYEXECUTE").target("READY")
.and()
.withExternal()
.source("READY").target("DONE")
.event("DONE")
.and()
.withExternal()
.source("DEPLOY").target("DONE")
.event("DONE");
}
}
// end::snippetF[]
static class TestListener extends StateMachineListenerAdapter<String, String> {
volatile CountDownLatch stateChangedLatch = new CountDownLatch(1);
volatile CountDownLatch stateMachineStartedLatch = new CountDownLatch(1);
volatile CountDownLatch readyStateEnteredLatch = new CountDownLatch(1);
volatile int readyStateEnteredCount = 0;
@Override
public void stateChanged(State<String, String> from, State<String, String> to) {
stateChangedLatch.countDown();
}
@Override
public void stateEntered(State<String, String> state) {
if (state.getId().equals("READY")) {
readyStateEnteredCount++;
readyStateEnteredLatch.countDown();
}
}
@Override
public void stateMachineStarted(StateMachine<String, String> stateMachine) {
stateMachineStartedLatch.countDown();
}
public void reset(int c1, int c2, int c3) {
stateChangedLatch = new CountDownLatch(c1);
stateMachineStartedLatch = new CountDownLatch(c2);
readyStateEnteredLatch = new CountDownLatch(c3);
readyStateEnteredCount = 0;
}
}
}