新建

李林

2023-10-07 658d4927d468c47208fd012d9128b09249c07eff

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
package com.chinaztt.mes.common.handler;
 
import com.baomidou.mybatisplus.extension.activerecord.Model;
import com.chinaztt.mes.common.util.StateResult;
import lombok.AllArgsConstructor;
import org.springframework.messaging.Message;
import org.springframework.statemachine.StateMachine;
import org.springframework.statemachine.config.StateMachineFactory;
import org.springframework.statemachine.persist.StateMachinePersister;
 
/**
 * @Author: zhangxy
 * @Date: 2020-08-31 15:42
 */
@AllArgsConstructor
public class StateMachineHandler {
 
    public static final String ERROR_KEY = "error";
 
    private StateMachineFactory stateMachineFactory;
 
    private StateMachinePersister persister;
 
    private String machineId;
 
    private Model model;
 
    public StateResult sendEvent(Message message, Object syncKey) {
        boolean result = false;
        synchronized (String.valueOf(syncKey).intern()) {
            StateMachine stateMachine = stateMachineFactory.getStateMachine(machineId);
            try {
                persister.restore(stateMachine, model);
                result = stateMachine.sendEvent(message);
                if (stateMachine.getExtendedState().getVariables().containsKey(ERROR_KEY)) {
                    return StateResult.failed((String) stateMachine.getExtendedState().getVariables().get(ERROR_KEY));
                }
            } catch (Exception e) {
                return StateResult.failed(e.getMessage());
            } finally {
                stateMachine.stop();
            }
            return StateResult.build(result);
        }
    }
}