public void TestRetryBlock(int failCount) { bool expectSuccess = failCount < SingleSegmentUploader.MaxBufferUploadAttemptCount; int callCount = 0; var workingFrontEnd = new InMemoryFrontEnd(); var fe = new MockableFrontEnd(workingFrontEnd); fe.CreateStreamImplementation = (streamPath, overwrite, data, byteCount) => { callCount++; if (callCount <= failCount) { throw new IntentionalException(); } workingFrontEnd.CreateStream(streamPath, overwrite, data, byteCount); }; fe.AppendToStreamImplementation = (streamPath, data, offset, byteCount) => { callCount++; if (callCount <= failCount) { throw new IntentionalException(); } workingFrontEnd.AppendToStream(streamPath, data, offset, byteCount); }; var metadata = CreateMetadata(_smallFilePath, _smallFileContents.Length); var progressTracker = new TestProgressTracker(); var ssu = new SingleSegmentUploader(0, metadata, fe, progressTracker); ssu.UseBackOffRetryStrategy = false; if (expectSuccess) { ssu.Upload(); var actualContents = workingFrontEnd.GetStreamContents(StreamPath); AssertExtensions.AreEqual(_smallFileContents, actualContents, "Unexpected uploaded stream contents."); } else { Assert.Throws <IntentionalException>(() => { ssu.Upload(); }); } VerifyTracker(progressTracker, expectSuccess); }
public void SingleSegmentUploader_TargetStreamExists() { var fe = new InMemoryFrontEnd(); //load up an existing stream fe.CreateStream(StreamPath, true, null, 0); var data = Encoding.UTF8.GetBytes("random"); fe.AppendToStream(StreamPath, data, 0, (int)data.Length); //force a re-upload of the stream var metadata = CreateMetadata(_smallFilePath, _smallFileContents.Length); var ssu = new SingleSegmentUploader(0, metadata, fe); ssu.UseBackOffRetryStrategy = false; ssu.Upload(); var actualContents = fe.GetStreamContents(StreamPath); AssertExtensions.AreEqual(_smallFileContents, actualContents, "Unexpected uploaded stream contents."); }
private void TestRetry(int segmentFailCount) { //we only have access to the underlying FrontEnd, so we need to simulate many exceptions in order to force a segment to fail the upload (multiply by SingleSegmentUploader.MaxBufferUploadAttemptAccount) //this only works because we have a small file, which we know will fit in only one buffer (for a larger file, more complex operations are necessary) int actualfailCount = segmentFailCount * SingleSegmentUploader.MaxBufferUploadAttemptCount; bool expectSuccess = segmentFailCount < MultipleSegmentUploader.MaxUploadAttemptCount; int callCount = 0; //create a mock front end sitting on top of a working front end that simulates some erros for some time var workingFrontEnd = new InMemoryFrontEnd(); var fe = new MockableFrontEnd(workingFrontEnd); fe.CreateStreamImplementation = (streamPath, overwrite, data, byteCount) => { callCount++; if (callCount <= actualfailCount) { throw new IntentionalException(); } workingFrontEnd.CreateStream(streamPath, overwrite, data, byteCount); }; fe.AppendToStreamImplementation = (streamPath, data, offset, byteCount) => { callCount++; if (callCount <= actualfailCount) { throw new IntentionalException(); } workingFrontEnd.AppendToStream(streamPath, data, offset, byteCount); }; var metadata = CreateMetadata(1); try { var msu = new MultipleSegmentUploader(metadata, 1, fe); msu.UseSegmentBlockBackOffRetryStrategy = false; if (expectSuccess) { //the Upload method should not throw any exceptions in this case msu.Upload(); //if we are expecting success, verify that both the metadata and the target streams are complete VerifyTargetStreamsAreComplete(metadata, workingFrontEnd); } else { //the Upload method should throw an aggregate exception in this case Assert.Throws <AggregateException>(() => { msu.Upload(); }); //if we do not expect success, verify that at least 1 segment was marked as Failed Assert.True(metadata.Segments.Any(s => s.Status == SegmentUploadStatus.Failed), "Could not find any failed segments"); //for every other segment, verify it was completed OK foreach (var segment in metadata.Segments.Where(s => s.Status != SegmentUploadStatus.Failed)) { VerifyTargetStreamIsComplete(segment, metadata, workingFrontEnd); } } } finally { metadata.DeleteFile(); } }
private void TestRetry(int segmentFailCount) { //we only have access to the underlying FrontEnd, so we need to simulate many exceptions in order to force a segment to fail the upload (multiply by SingleSegmentUploader.MaxBufferUploadAttemptAccount) //this only works because we have a small file, which we know will fit in only one buffer (for a larger file, more complex operations are necessary) int actualfailCount = segmentFailCount * SingleSegmentUploader.MaxBufferUploadAttemptCount; bool expectSuccess = segmentFailCount < MultipleSegmentUploader.MaxUploadAttemptCount; int callCount = 0; //create a mock front end sitting on top of a working front end that simulates some erros for some time var workingFrontEnd = new InMemoryFrontEnd(); var fe = new MockableFrontEnd(workingFrontEnd); fe.CreateStreamImplementation = (streamPath, overwrite, data, byteCount) => { callCount++; if (callCount <= actualfailCount) { throw new IntentionalException(); } workingFrontEnd.CreateStream(streamPath, overwrite, data, byteCount); }; fe.AppendToStreamImplementation = (streamPath, data, offset, byteCount) => { callCount++; if (callCount <= actualfailCount) { throw new IntentionalException(); } workingFrontEnd.AppendToStream(streamPath, data, offset, byteCount); }; var metadata = CreateMetadata(1); try { var msu = new MultipleSegmentUploader(metadata, 1, fe); msu.UseSegmentBlockBackOffRetryStrategy = false; if (expectSuccess) { //the Upload method should not throw any exceptions in this case Assert.DoesNotThrow(() => { msu.Upload(); }); //if we are expecting success, verify that both the metadata and the target streams are complete VerifyTargetStreamsAreComplete(metadata, workingFrontEnd); } else { //the Upload method should throw an aggregate exception in this case Assert.Throws<AggregateException>(() => { msu.Upload(); }); //if we do not expect success, verify that at least 1 segment was marked as Failed Assert.True(metadata.Segments.Any(s => s.Status == SegmentUploadStatus.Failed), "Could not find any failed segments"); //for every other segment, verify it was completed OK foreach (var segment in metadata.Segments.Where(s => s.Status != SegmentUploadStatus.Failed)) { VerifyTargetStreamIsComplete(segment, metadata, workingFrontEnd); } } } finally { metadata.DeleteFile(); } }