60 lines
2.2 KiB
MQL5
60 lines
2.2 KiB
MQL5
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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class CDatabaseVersionManager
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{
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public:
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string ReadStoredDbVersion(string versionFilePath)
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{
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if(!FileIsExist(versionFilePath, FILE_COMMON))
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return "NA";
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int fileHandle = INVALID_HANDLE; // Initialize to a safe value
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int attempts = 0;
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while(attempts < 5)
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{
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fileHandle = FileOpen(versionFilePath, FILE_COMMON | FILE_READ);
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if(fileHandle != INVALID_HANDLE)
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{
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break; // Success, break out of the loop
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}
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Print("Retry " + IntegerToString(attempts + 1) + " failed to open file for reading: " + versionFilePath);
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Sleep(1000); // Wait for a second before retrying
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attempts++;
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}
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if(fileHandle == INVALID_HANDLE)
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{
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Print("Failed to open file for reading after retries: " + versionFilePath);
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return "ERROR";
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}
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string dbVersion = FileReadString(fileHandle);
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FileClose(fileHandle);
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return dbVersion;
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}
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bool UpdateStoredDbVersion(string versionFilePath, string dbVersion)
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{
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int fileHandle = INVALID_HANDLE; // Initialize to a safe value
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int attempts = 0;
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while(attempts < 5)
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{
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fileHandle = FileOpen(versionFilePath, FILE_COMMON | FILE_WRITE);
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if(fileHandle != INVALID_HANDLE)
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{
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break; // Success, break out of the loop
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}
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Print("Retry " + IntegerToString(attempts + 1) + " failed to open file for writing: " + versionFilePath);
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Sleep(1000); // Wait for a second before retrying
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attempts++;
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}
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if(fileHandle == INVALID_HANDLE)
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{
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Print("Failed to open file for writing after retries: " + versionFilePath);
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return false;
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}
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FileWriteString(fileHandle, dbVersion);
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FileClose(fileHandle);
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return true;
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}
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};
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//+------------------------------------------------------------------+
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