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Using custom queries for SQL Server health check #92

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Using custom queries for SQL Server health check #92

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15 changes: 7 additions & 8 deletions src/Microsoft.Extensions.HealthChecks.SqlServer/HealthCheckBuilderSqlServerExtensions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ public static HealthCheckBuilder AddSqlCheck(this HealthCheckBuilder builder, st
return AddSqlCheck(builder, name, connectionString, builder.DefaultCacheDuration);
}

public static HealthCheckBuilder AddSqlCheck(this HealthCheckBuilder builder, string name, string connectionString, TimeSpan cacheDuration)
public static HealthCheckBuilder AddSqlCheck(this HealthCheckBuilder builder, string name, string connectionString, TimeSpan cacheDuration,string query="SELECT 1", Predicate<int> predicate = (result)=>result==1)
{
builder.AddCheck($"SqlCheck({name})", async () =>
{
Expand All @@ -31,14 +31,13 @@ public static HealthCheckBuilder AddSqlCheck(this HealthCheckBuilder builder, st
using (var command = connection.CreateCommand())
{
command.CommandType = CommandType.Text;
command.CommandText = "SELECT 1";
var result = (int)await command.ExecuteScalarAsync().ConfigureAwait(false);
if (result == 1)
{
return HealthCheckResult.Healthy($"SqlCheck({name}): Healthy");
}
command.CommandText = query;

return HealthCheckResult.Unhealthy($"SqlCheck({name}): Unhealthy");
var result = (int)await command.ExecuteScalarAsync().ConfigureAwait(false);

return predicate(result)
? HealthCheckResult.Healthy($"SqlCheck({name}): Healthy")
: HealthCheckResult.Unhealthy($"SqlCheck({name}): Unhealthy");
}
}
}
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