sql/error_delegate_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SQL_ERROR_DELEGATE_UTIL_H_
   6 #define SQL_ERROR_DELEGATE_UTIL_H_
   7
   8 #include "base/metrics/histogram.h"
   9 #include "sql/connection.h"
  10 #include "sql/sql_export.h"
  11
  12 namespace sql {
  13
  14 // Returns true if it is highly unlikely that the database can recover from
  15 // |error|.
  16 SQL_EXPORT bool IsErrorCatastrophic(int error);
  17
  18 // Log error in console in debug mode and generate a UMA histogram in release
  19 // mode for |error| for |UniqueT::name()|.
  20 // This function is templated because histograms need to be singletons. That is
  21 // why they are always static at the function scope. The template parameter
  22 // makes the compiler create unique functions that don't share the same static
  23 // variable.
  24 template <class UniqueT>
  25 void LogAndRecordErrorInHistogram(int error,
  26                                   sql::Connection* connection) {
  27   LOG(ERROR) << "sqlite error " << error
  28              << ", errno " << connection->GetLastErrno()
  29              << ": " << connection->GetErrorMessage();
  30
  31   // Trim off the extended error codes.
  32   error &= 0xff;
  33
  34   // The histogram values from sqlite result codes currently go from 1 to 26
  35   // but 50 gives them room to grow.
  36   UMA_HISTOGRAM_ENUMERATION(UniqueT::name(), error, 50);
  37 }
  38
  39 }  // namespace sql
  40
  41 #endif  // SQL_ERROR_DELEGATE_UTIL_H_