public ExportJobTaskTests()
{
_cancellationToken = _cancellationTokenSource.Token;
_exportJobRecord = new ExportJobRecord(
new Uri("https://localhost/ExportJob/"),
"Patient",
"hash");
_fhirOperationDataStore.UpdateExportJobAsync(_exportJobRecord, _weakETag, _cancellationToken).Returns(x =>
{
_lastExportJobOutcome = new ExportJobOutcome(_exportJobRecord, _weakETag);
return(_lastExportJobOutcome);
});
_secretStore.GetSecretAsync(Arg.Any <string>(), _cancellationToken).Returns(x => new SecretWrapper(x.ArgAt <string>(0), "{\"destinationType\": \"in-memory\"}"));
_exportDestinationClientFactory.Create("in-memory").Returns(_inMemoryDestinationClient);
_resourceToByteArraySerializer.Serialize(Arg.Any <ResourceWrapper>()).Returns(x => Encoding.UTF8.GetBytes(x.ArgAt <ResourceWrapper>(0).ResourceId));
_exportJobTask = new ExportJobTask(
() => _fhirOperationDataStore.CreateMockScope(),
_secretStore,
Options.Create(_exportJobConfiguration),
() => _searchService.CreateMockScope(),
_resourceToByteArraySerializer,
_exportDestinationClientFactory,
NullLogger <ExportJobTask> .Instance);
}
// Get destination info from secret store, create appropriate export client and connect to destination.
private async Task GetDestinationInfoAndConnectAsync(CancellationToken cancellationToken)
{
SecretWrapper secret = await _secretStore.GetSecretAsync(_exportJobRecord.SecretName, cancellationToken);
DestinationInfo destinationInfo = JsonConvert.DeserializeObject <DestinationInfo>(secret.SecretValue);
_exportDestinationClient = _exportDestinationClientFactory.Create(destinationInfo.DestinationType);
await _exportDestinationClient.ConnectAsync(destinationInfo.DestinationConnectionString, cancellationToken, _exportJobRecord.Id);
}
/// <inheritdoc />
public async Task ExecuteAsync(ExportJobRecord exportJobRecord, WeakETag weakETag, CancellationToken cancellationToken)
{
EnsureArg.IsNotNull(exportJobRecord, nameof(exportJobRecord));
_exportJobRecord = exportJobRecord;
_weakETag = weakETag;
try
{
// Get destination type from secret store.
DestinationInfo destinationInfo = await GetDestinationInfo(cancellationToken);
// Connect to the destination using appropriate client.
_exportDestinationClient = _exportDestinationClientFactory.Create(destinationInfo.DestinationType);
await _exportDestinationClient.ConnectAsync(destinationInfo.DestinationConnectionString, cancellationToken, _exportJobRecord.Id);
// TODO: For now, always restart from the beginning. We will support resume in another work item.
_exportJobRecord.Progress = new ExportJobProgress(continuationToken: null, page: 0);
ExportJobProgress progress = _exportJobRecord.Progress;
// Current page will be used to organize a set of search results into a group so that they can be committed together.
uint currentBatchId = progress.Page;
// The first item is placeholder for continuation token so that it can be updated efficiently later.
var queryParameters = new Tuple <string, string>[]
{
null,
Tuple.Create(KnownQueryParameterNames.Count, _exportJobConfiguration.MaximumNumberOfResourcesPerQuery.ToString(CultureInfo.InvariantCulture)),
Tuple.Create(KnownQueryParameterNames.LastUpdated, $"le{_exportJobRecord.QueuedTime.ToString("o", CultureInfo.InvariantCulture)}"),
};
// Process the export if:
// 1. There is continuation token, which means there is more resource to be exported.
// 2. There is no continuation token but the page is 0, which means it's the initial export.
while (progress.ContinuationToken != null || progress.Page == 0)
{
// Commit the changes if necessary.
if (progress.Page != 0 && progress.Page % _exportJobConfiguration.NumberOfPagesPerCommit == 0)
{
await _exportDestinationClient.CommitAsync(cancellationToken);
// Update the job record.
await UpdateJobRecord(_exportJobRecord, cancellationToken);
currentBatchId = progress.Page;
}
// Set the continuation token.
queryParameters[0] = Tuple.Create(KnownQueryParameterNames.ContinuationToken, progress.ContinuationToken);
SearchResult searchResult = await _searchService.SearchAsync(_exportJobRecord.ResourceType, queryParameters, cancellationToken);
foreach (ResourceWrapper resourceWrapper in searchResult.Results)
{
await ProcessResourceWrapperAsync(resourceWrapper, currentBatchId, cancellationToken);
}
if (searchResult.ContinuationToken == null)
{
// No more continuation token, we are done.
break;
}
// Update the job record.
progress.UpdateContinuationToken(searchResult.ContinuationToken);
}
// Commit one last time for any pending changes.
await _exportDestinationClient.CommitAsync(cancellationToken);
_exportJobRecord.Output.AddRange(_resourceTypeToFileInfoMapping.Values);
_logger.LogTrace("Successfully completed the job.");
await UpdateJobStatus(OperationStatus.Completed, updateEndTimestamp : true, cancellationToken);
try
{
// Best effort to delete the secret. If it fails to delete, then move on.
await _secretStore.DeleteSecretAsync(_exportJobRecord.SecretName, cancellationToken);
}
catch (Exception ex)
{
_logger.LogWarning(ex, "Failed to delete the secret.");
}
}
catch (JobConflictException)
{
// The job was updated by another process.
_logger.LogWarning("The job was updated by another process.");
// TODO: We will want to get the latest and merge the results without updating the status.
return;
}
catch (Exception ex)
{
// The job has encountered an error it cannot recover from.
// Try to update the job to failed state.
_logger.LogError(ex, "Encountered an unhandled exception. The job will be marked as failed.");
await UpdateJobStatus(OperationStatus.Failed, updateEndTimestamp : true, cancellationToken);
}
}
