Topic: Parallel and Delay (Read 137 times)

#include 
#include 
#include 
#include 
#include 
#include 
#include 

// Transaction class definition
class Transaction {
public:
    std::string user_id;
    std::string payload;

    Transaction(const std::string &user_id, const std::string &payload) : user_id(user_id), payload(payload) {}
};

// BufferLayer class definition
class BufferLayer {
private:
    std::queue requestQueue;
    std::unordered_map processedResults;
    std::mutex mtx;
    std::condition_variable cv;
    bool finished = false;

public:
    void addTransaction(const Transaction &transaction) {
        std::lock_guard lock(mtx);
        requestQueue.push(transaction);
        cv.notify_one();
    }

    void processTransactions() {
        std::unique_lock lock(mtx);
        while (!finished) {
            if (requestQueue.empty()) {
                cv.wait(lock);
            } else {
                Transaction transaction = requestQueue.front();
                requestQueue.pop();
                lock.unlock();
                std::string simulatedResult = simulateExecution(transaction);
                presentPreprocessedResult(transaction, simulatedResult);
                lock.lock();
            }
        }
    }

    void finishProcessing() {
        std::lock_guard lock(mtx);
        finished = true;
        cv.notify_all();
    }

    std::string getResultForUser(const std::string &user_id) {
        std::lock_guard lock(mtx);
        auto it = processedResults.find(user_id);
        if (it != processedResults.end()) {
            return it->second;
        }
        return "Result not found";
    }

private:
    std::string simulateExecution(const Transaction &transaction) {
        // Simulate execution logic
        return "Simulated Result for " + transaction.payload;
    }

    void presentPreprocessedResult(const Transaction &transaction, const std::string &simulatedResult) {
        // Present the preprocessed result logic
        processedResults[transaction.user_id] = simulatedResult;
    }
};

// BaseChain class definition
class BaseChain {
private:
    BufferLayer &bufferLayer;

public:
    BaseChain(BufferLayer &bufferLayer) : bufferLayer(bufferLayer) {}

    void receiveAndExecuteTransaction(const Transaction &transaction) {
        // Execute the transaction on the base chain
        std::string executedResult = "Executed Result for " + transaction.payload;
        syncWithBufferLayer(transaction, executedResult);
    }

private:
    void syncWithBufferLayer(const Transaction &transaction, const std::string &executedResult) {
        // Synchronize buffer layer logic
        // Assuming bufferLayer has a method to update the processed results
        bufferLayer.presentPreprocessedResult(transaction, executedResult);
    }
};

// Usage example
int main() {
    BufferLayer bufferLayer;

    // Start buffer layer processing thread
    std::thread bufferLayerThread(&BufferLayer::processTransactions, &bufferLayer);

    // Create a BaseChain object with reference to BufferLayer
    BaseChain baseChain(bufferLayer);

    // Create a transaction
    Transaction newTransaction("user123", "data");

    // Add transaction to buffer layer
    bufferLayer.addTransaction(newTransaction);

    // Simulate base chain receiving and executing the transaction
    baseChain.receiveAndExecuteTransaction(newTransaction);

    // Finish processing in the buffer layer
    bufferLayer.finishProcessing();

    // Wait for buffer layer thread to complete
    bufferLayerThread.join();

    // Retrieve the result
    std::string result = bufferLayer.getResultForUser("user123");
    std::cout << result << std::endl;

    return 0;
}