public void FunctionHandler(DynamoDBEvent dynamoEvent, ILambdaContext context)
{
context.Logger.LogLine($"Beginning to process {dynamoEvent.Records.Count} records...");
foreach (var record in dynamoEvent.Records)
{
var oldImage = Document.FromAttributeMap(record.Dynamodb.OldImage);
var newImage = Document.FromAttributeMap(record.Dynamodb.NewImage);
var oldState = _dynamoDbContext.FromDocument <Lightbulb>(oldImage);
var newState = _dynamoDbContext.FromDocument <Lightbulb>(newImage);
var changes = _changeProcessor.GetChanges(oldState, newState);
if (changes.success)
{
PublishResponse publishResponse = _snsClient.PublishAsync(_snsArn, changes.message, "Lightbulb").Result;
context.Logger.LogLine($"Sent Message '{changes.message}' with SNS MessageId: {publishResponse.MessageId}");
}
else
{
context.Logger.LogLine("No useful changes detected");
}
}
context.Logger.LogLine("Stream processing complete.");
}
public async Task <OpenLibraryVersion> FindLatestArchiveEntry(OpenLibraryArchiveType archiveType, CancellationToken ct)
{
var attributeValuesMap = new Dictionary <string, AttributeValue>
{
{ ":kind", new AttributeValue {
S = archiveType.GetKey()
} },
{ ":date", new AttributeValue {
S = _clock.UtcNow().ToIsoDateString()
} },
};
var queryReq = new QueryRequest
{
TableName = _openLibVersionsTable,
KeyConditionExpression = "Kind = :kind AND PublishDate <= :date",
ScanIndexForward = false, // False = sort by descending
ExpressionAttributeValues = attributeValuesMap,
Limit = 1,
};
var queryResults = await _dynamoClient.QueryAsync(queryReq, ct);
var theResult = queryResults.Items?.SingleOrDefault();
if (theResult is null)
{
return(null);
}
var doc = Document.FromAttributeMap(theResult);
var typed = _pocoClient.FromDocument <OpenLibraryVersion>(doc);
return(typed);
}
async Task <IEnumerable <Member> > IDataRepository.GetMembers(string churchId, IEnumerable <string> memberIds)
{
var batchGet = _membersTable.CreateBatchGet();
foreach (var memberId in memberIds)
{
batchGet.AddKey(churchId, memberId);
}
await batchGet.ExecuteAsync();
return(batchGet.Results.Select(doc => _ddbContext.FromDocument <Member>(doc)));
}
public object FromEntry(DynamoDBEntry entry)
{
var document = entry.AsDocument();
if (document == null)
{
return(null);
}
var result = new Dictionary <string, TEntity>();
document.Keys.ToList().ForEach(key =>
{
var item = document[key].AsDocument();
var entity = _dbContext.FromDocument <TEntity>(item);
result.Add(key, entity);
});
return(result);
}
public object FromEntry(DynamoDBEntry entry)
{
var document = entry.AsDocument();
return(_dbContext.FromDocument <TEntity>(document));
}