org.zrgs.spring.statemachine.CommonConfiguration.java Source code

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Here is the source code for org.zrgs.spring.statemachine.CommonConfiguration.java

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/*
 * 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.zrgs.spring.statemachine;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.statemachine.event.OnStateEntryEvent;
import org.springframework.statemachine.event.OnStateExitEvent;
import org.springframework.statemachine.event.OnTransitionEvent;
import org.springframework.statemachine.event.StateMachineEvent;
import org.springframework.statemachine.transition.TransitionKind;

import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;

@Configuration
public class CommonConfiguration {

    private static final Log log = LogFactory.getLog(CommonConfiguration.class);

    @Bean
    public TestEventListener testEventListener() {
        return new TestEventListener();
    }

    @Bean
    public String stateChartModel() throws IOException {
        ClassPathResource model = new ClassPathResource("statechartmodel.txt");
        InputStream inputStream = model.getInputStream();
        Scanner scanner = new Scanner(inputStream);
        String content = scanner.useDelimiter("\\Z").next();
        scanner.close();
        return content;
    }

    static class TestEventListener implements ApplicationListener<StateMachineEvent> {
        @Override
        public void onApplicationEvent(StateMachineEvent event) {
            if (event instanceof OnStateEntryEvent) {
                OnStateEntryEvent e = (OnStateEntryEvent) event;
                log.info("Entry state " + e.getState().getId());
            } else if (event instanceof OnStateExitEvent) {
                OnStateExitEvent e = (OnStateExitEvent) event;
                log.info("Exit state " + e.getState().getId());
            } else if (event instanceof OnTransitionEvent) {
                OnTransitionEvent e = (OnTransitionEvent) event;

                if (e.getTransition().getKind() == TransitionKind.INTERNAL) {
                    log.info("Internal transition source=" + e.getTransition().getSource().getId());
                }
            }
        }
    }
}