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issue=#1281: add observer implement, including executor, multi-thread scan and trigger calculation etc. #1288

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@FessGo FessGo commented Jun 8, 2017

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bool ret = true;
tera::ScanDescriptor desc(start_key);
desc.SetAsync(FLAGS_observer_scan_async_switch);
// Notify�д洢�ڵ���lg
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请将这个设置成恒true

@caijieming-ng
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#1281

class Observer {
public:
// ����۲���Ψһ��ʾ���Լ����۲���
Observer(const std::string& observer_name, ColumnList& observed_columns);
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observed_columns放在构造函数里参数不太好, 作为observe的参数比较好

namespace observer {

/// ִ����
class Executor {
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Executor不是用户要实现的接口吧?

virtual bool Init();

// �û�ʵ�ִ˽ӿ���������
virtual bool Close();
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Close接口不需要吧

}

bool Observer::Ack(ColumnList& columns, const std::string& row, int64_t timestamp) {
return ExecutorImpl::SetOrClearNotification(columns, row, timestamp, kClearNotification);
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应该实现在transaction里

int64_t timestamp;
};

typedef boost::shared_ptr<Tuple> TuplePtr;
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别用boost了, 基本的库用c++11

virtual ~Observer();

// �û�ʵ�ִ˽ӿ��õ��۲����ϱ仯���, ��ɼ���
virtual bool OnNotify(tera::Transaction* t,
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返回status好一些

}

bool Observer::OnNotify(tera::Transaction* t,
tera::Table* table,
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应该不需要传table的指针, 可以传入tablename, observer读写tera都通过transaction

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3 participants