YR_RECOVER

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YR_RECOVER#

YR_RECOVER(...)#

Users can use this interface to perform data recovery operations.

Functions to be executed during instance recovery must be decorated with YR_RECOVER. This macro is used to decorate user-defined state member functions within actors executing in the cloud. Functions decorated with YR_RECOVER can utilize Yuanrong interfaces. These functions will be executed in the following scenarios: during runtime recovery requests to restore instances. 

class Counter {
public:
    int count;
    int recoverFlag = 0;

    Counter() {}

    explicit Counter(int init) : count(init) {}

    static Counter *FactoryCreate(int init)
    {
        return new Counter(init);
    }
    int SaveState();

    int LoadState();

    void Recover();
};

int Counter::SaveState()
{
    YR::SaveState();
    return count;
}

int Counter::LoadState()
{
    YR::LoadState();
    return count;
}

YR_INVOKE(&Counter::SaveState, &Counter::LoadState);

void Counter::Recover()
{
    std::cout << "recover" << std::endl;
    recoverFlag++;
}

YR_RECOVER(&Counter::Recover);

Throws Exception:

If a function is detected to be registered multiple times, the program will exit with an error message.

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