PlantUML学习：下单流程图示例

@startuml
autonumber "<font color=black><b>"
== 下单过程 ==
activate "tpserver"
tpserver -> "dispatcher": 调用下单接口
activate "dispatcher"

autonumber resume "<font color=red><b>"
"dispatcher"->"dispatcher":创建加购记录
activate "dispatcher" #DarkSalmon

alt  请求里面有加购商品
    "dispatcher"->"order-server":调用获取订单号接口
    activate "dispatcher"
    activate "order-server"
    alt 幂等根据partnerOrder\n查找支付记录 已有支付记录是否是相同的order唯一标识\n唯一标识可以由partnerOrder,amount,productCode,payType\nvouId等字段组成的字符串MD5后的字符串
        "order-server"->"order-server":获取原记录支付订单号
    else 无记录
        "order-server"->"order-server":返回新生成的支付订单号
    end
    "order-server"->"dispatcher":返回支付订单号以及标志newGenerate（是否是新创建的订单号）
    deactivate "dispatcher"
    deactivate "order-server"
else 请求无加购记录
end

alt newGenerate==true
    "dispatcher" ->"pay-base-shop" :调用加购记录初始化接口
    activate "dispatcher"
    activate "pay-base-shop"

        alt 根据支付订单号+productCode\n检查加购记录
            "pay-base-shop"->"pay-base-shop": 获取原记录的partnerOrder
        else 无记录
            "pay-base-shop"->"pay-base-shop": 插入新的加购记录\n additionalPurchaseRecord
        end
    "pay-base-shop"->"dispatcher":返回"JGxxx"加购交易订单号
    deactivate "pay-base-shop"

    "dispatcher"->"order-server":调用批量创建交易订单记录
    activate "dispatcher"
    activate "order-server"
    alt 根据ssoid和partnerOrder\n查找交易记录,有记录
        "order-server"->"order-server":如果交易记录状态为OK,抛异常信息:订单已存在
        activate "order-server"
        deactivate "order-server"
    else  无记录
        "order-server"->"order-server": 插入记录，但payReqId和金额等字段不插入
        activate "order-server"
        deactivate "order-server"
        "order-server"->"order-server": 插入映射表order_user_map\n新的记录，即partnerOrder->ssoid
        activate "order-server"
        deactivate "order-server"
    end
    "order-server"->"dispatcher"
    deactivate "order-server"
    deactivate "dispatcher"

    "dispatcher" -> "order-server": 调用支付订单初始化接口
    activate dispatcher
    autonumber stop