private DeleteMessageBatchRequest GetBatchMessageRequest(List <Message> messages)
{
var batchDelete = new DeleteMessageBatchRequestEntry[messages.Count];
for (int i = 0; i < messages.Count; i++)
{
batchDelete[i] = new DeleteMessageBatchRequestEntry(messages[i].MessageId, messages[i].ReceiptHandle);
}
return(new DeleteMessageBatchRequest(_config["AwsSqs:QueueUrl"], batchDelete.ToList()));
}
private DeleteMessageBatchRequest BuildDeleteMessageBatchRequest(IEnumerable <string> ids)
{
var deleteMessageBatchRequest =
new DeleteMessageBatchRequest {
QueueUrl = _queueUrl, Entries = new List <DeleteMessageBatchRequestEntry>()
};
foreach (var id in ids)
{
var entry = new DeleteMessageBatchRequestEntry(Guid.NewGuid().ToString(), id);
deleteMessageBatchRequest.Entries.Add(entry);
}
return(deleteMessageBatchRequest);
}
/// <summary>
/// Processes the events that defines loans updates.
/// </summary>
/// <param name="input"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task FunctionHandler(SQSEvent input, ILambdaContext context)
{
ILogger logger = new LambdaLoggerWrapper();
var processor = new SnapshotGenerationUseCase(logger, new DynamoDbLoanRepository(logger));
var processedMessages = new List <DeleteMessageBatchRequestEntry>();
var exceptions = new List <Exception>();
foreach (var record in input.Records)
{
try
{
string eventType = record.Attributes.SingleOrDefault(s => s.Key == "EventType").Value;
var @event = new Event(record.Attributes.SingleOrDefault(s => s.Key == "LoanId").Value,
record.MessageId,
eventType,
long.Parse(record.Attributes.SingleOrDefault(s => s.Key == "SentTimestamp").Value),
record.Body);
await processor.Process(@event);
var processedMessageToBeDeleted = new DeleteMessageBatchRequestEntry
{
Id = record.MessageId,
ReceiptHandle = record.ReceiptHandle
};
processedMessages.Add(processedMessageToBeDeleted);
}
catch (Exception ex)
{
exceptions.Add(ex);
}
}
await RemoveProcessedMessagesFromQueue(processedMessages);
if (exceptions.Count > 0)
{
throw new AggregateException(exceptions);
}
}
public Task Delete(string receiptHandle, CancellationToken cancellationToken)
{
var entry = new DeleteMessageBatchRequestEntry("", receiptHandle);
return(_batchDeleter.Execute(entry, cancellationToken));
}
public static void SQSDeleteMessageBatch()
{
#region SQSDeleteMessageBatch
var client = new AmazonSQSClient();
var request = new ReceiveMessageRequest
{
AttributeNames = new List <string>()
{
"All"
},
MaxNumberOfMessages = 5,
QueueUrl = "https://sqs.us-east-1.amazonaws.com/80398EXAMPLE/MyTestQueue",
VisibilityTimeout = (int)TimeSpan.FromMinutes(10).TotalSeconds,
WaitTimeSeconds = (int)TimeSpan.FromSeconds(5).TotalSeconds
};
var response = client.ReceiveMessage(request);
var batchEntries = new List <DeleteMessageBatchRequestEntry>();
if (response.Messages.Count > 0)
{
foreach (var message in response.Messages)
{
var batchEntry = new DeleteMessageBatchRequestEntry
{
Id = message.MessageId,
ReceiptHandle = message.ReceiptHandle
};
batchEntries.Add(batchEntry);
}
var delRequest = new DeleteMessageBatchRequest
{
Entries = batchEntries,
QueueUrl = "https://sqs.us-east-1.amazonaws.com/80398EXAMPLE/MyTestQueue"
};
var delResponse = client.DeleteMessageBatch(delRequest);
if (delResponse.Failed.Count > 0)
{
Console.WriteLine("Failed deletions:");
foreach (var failure in delResponse.Failed)
{
Console.WriteLine(" For ID '" + failure.Id + "': ");
Console.WriteLine(" Code = " + failure.Code);
Console.WriteLine(" Message = " + failure.Message);
Console.WriteLine(" Sender's fault? = " + failure.SenderFault);
}
}
if (delResponse.Successful.Count > 0)
{
Console.WriteLine("Successful deletions:");
foreach (var success in delResponse.Successful)
{
Console.WriteLine(" ID '" + success.Id + "'");
}
}
}
else
{
Console.WriteLine("No messages to delete.");
}
#endregion
Console.ReadLine();
}
