分布式TC事务TCC模式

第一阶段
Try 对操作数据进行 预留、冻结 资源
第二阶段‘
Confirm 提交
Cancel 回滚

@LocalTCC
public interface OrderTccAction { 
    
    @TwoPhaseBusinessAction(name = "xOrderTccAction") //加上这个注解就是第一阶段方法，commitMeth="commit"默认
    boolean prepare(BusinessActionContext ctx,
                    @BusinessActionContextParameter(paramName = "orderId") Long orderId,
                    Long userId,
                    Long productId,
                    Integer count,
                    BigDecimal money);

    boolean commit(BusinessActionContext ctx);
    boolean rollback(BusinessActionContext ctx);
}

public class ResultHolder {
    private static Map, Map> map = new ConcurrentHashMap, Map>();

    public static void setResult(Class actionClass, String xid, String v) {
        Map results = map.get(actionClass);

        if (results == null) {
            synchronized (map) {
                if (results == null) {
                    results = new ConcurrentHashMap<>();
                    map.put(actionClass, results);
                }
            }
        }

        results.put(xid, v);
    }

    public static String getResult(Class actionClass, String xid) {
        Map results = map.get(actionClass);
        if (results != null) {
            return results.get(xid);
        }

        return null;
    }

    public static void removeResult(Class actionClass, String xid) {
        Map results = map.get(actionClass);
        if (results != null) {
            results.remove(xid);
        }
    }
}