public async Task <ScoreMeta> GetScoreMetaAsync(string scoreName)
{
var convertor = new ScoreMetaConvertor();
var key = $"{scoreName}/{ScoreMeta.FileName}";
Stream currentStream;
try
{
var request = new GetObjectRequest
{
BucketName = BucketName,
Key = key,
};
var response = await this.S3Client.GetObjectAsync(request);
currentStream = response.ResponseStream;
}
catch (AmazonS3Exception e)
{
if (e.ErrorCode == "NoSuchKey")
{
throw new InvalidOperationException($"'{scoreName}' は存在しません");
}
throw;
}
var scoreMeta = await convertor.ConvertToScoreMeta(currentStream);
return(scoreMeta);
}
public async Task SaveScoreMetaAsync(string scoreName, ScoreMeta scoreMeta, string metaKey)
{
var convertor = new ScoreMetaConvertor();
var key = $"{scoreName}/{ScoreMeta.FileName}";
int retryCount = 5;
for (int i = 0; i < retryCount; i++)
{
try
{
var stream = await convertor.ConvertToUtf(scoreMeta);
var putRequest = new PutObjectRequest
{
BucketName = BucketName,
Key = key,
InputStream = stream,
CannedACL = S3CannedACL.PublicRead,
};
await this.S3Client.PutObjectAsync(putRequest);
}
catch (AmazonS3Exception)
{
// Error
throw;
}
try
{
var request = new GetObjectRequest
{
BucketName = BucketName,
Key = key,
};
var response = await this.S3Client.GetObjectAsync(request);
var stream = response.ResponseStream;
var checkedMeta = await convertor.ConvertToScoreMeta(stream);
// 同一のキーが登録される可能性があるがキーには少数3桁の時間を指定してるので
// ほぼキーが重なる自体はないと考える
// もしキーの重複が問題になる用であれば内容の比較も行う
if (checkedMeta.ContainsKey(metaKey))
{
return;
}
}
catch (AmazonS3Exception)
{
// skip
}
if (i < (retryCount - 1))
{
Thread.Sleep(2000);
}
}
throw new InvalidOperationException("追加更新に失敗しました");
}