public void Init()
{
var accountId = Environment.GetEnvironmentVariable("SQS_ACCOUNT_ID");
if(string.IsNullOrEmpty(accountId)) {
accountId = "accountid";
}
var publicKey = Environment.GetEnvironmentVariable("AWS_ACCESS_KEY_ID");
if(string.IsNullOrEmpty(publicKey)) {
publicKey = "publickey";
}
var privateKey = Environment.GetEnvironmentVariable("AWS_SECRET_ACCESS_KEY");
if(string.IsNullOrEmpty("privatekey")) {
privateKey = "privatekey";
}
_client = new SqsClient(SqsClientConfig.From(new XDoc("sqs-config")
.Elem("endpoint", "default")
.Elem("accountid", accountId)
.Elem("publickey", publicKey)
.Elem("privatekey", privateKey)));
TEST_QUEUE = new SqsQueueName("steveb-events");
// purge the queue
while(true) {
var messages = _client.ReceiveMessages(TEST_QUEUE, 1.Seconds(), SqsUtils.MAX_NUMBER_OF_MESSAGES_TO_FETCH);
if(messages.None()) {
break;
}
_client.DeleteMessages(TEST_QUEUE, messages);
}
}
public IEnumerable<SqsMessageId> DeleteMessages(SqsQueueName queueName, IEnumerable<SqsMessage> messages)
{
foreach(var message in messages) {
DeleteMessage(queueName, message.MessageReceipt);
}
return new SqsMessageId[0];
}
private void AssertQueueIsNotNull(SqsQueueName queueName, List <QueueEntry> queue)
{
if (queue == null)
{
throw new InMemorySqsNullQueueException(string.Format("Queue '{0}' is null", queueName));
}
}
/// <summary>
/// Send one or more message to a named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBodies">Enumeration of message bodies.</param>
/// <returns>Enumeration of message bodies that failed to send.</returns>
public IEnumerable <string> SendMessages(SqsQueueName queueName, IEnumerable <string> messageBodies)
{
if (messageBodies.Count() > SqsUtils.MAX_NUMBER_OF_BATCH_SEND_MESSAGES)
{
throw new ArgumentException(string.Format("messageBodies is larger than {0}, which is the maximum", SqsUtils.MAX_NUMBER_OF_BATCH_SEND_MESSAGES));
}
var msgId = 1;
var attributes = GetQueueNameAttribute(queueName.Value);
var sendEntries = (from messageBody in messageBodies select new SendMessageBatchRequestEntry {
MessageBody = messageBody, Id = string.Format("msg-{0}", msgId++), MessageAttributes = attributes
}).ToList();
var response = Invoke(() =>
_client.SendMessageBatch(new SendMessageBatchRequest {
QueueUrl = GetQueueUrl(queueName.Value),
Entries = sendEntries
}),
queueName,
SENDING_BATCH_MESSAGES);
AssertSuccessfulStatusCode(response.HttpStatusCode, queueName, SENDING_BATCH_MESSAGES);
if (response.Failed.None())
{
return(Enumerable.Empty <string>());
}
var messagesById = sendEntries.ToDictionary(entry => entry.Id, entry => entry.MessageBody);
return(response.Failed.Select(failed => messagesById.TryGetValue(failed.Id, null)).Where(messageBody => messageBody != null).ToArray());
}
//--- Class Methods ---
private static void AssertSuccessfulStatusCode(HttpStatusCode statusCode, SqsQueueName queueName, string sqsOperation)
{
if (statusCode != HttpStatusCode.OK)
{
throw new SqsException(string.Format("Got a '{0}' response while '{1}' from SQS queue '{2}'", statusCode, sqsOperation, queueName.Value), null);
}
}
//--- Methods ---
/// <summary>
/// Receive zero or more messages from name queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="waitTimeSeconds">Max amount of time to wait until this method returns.</param>
/// <param name="maxNumberOfMessages">Max number of messages to request.</param>
/// <returns>Enumeration of received messages.</returns>
public IEnumerable <SqsMessage> ReceiveMessages(SqsQueueName queueName, TimeSpan waitTimeSeconds, uint maxNumberOfMessages)
{
// Check preconditions
if (waitTimeSeconds.TotalSeconds > SqsUtils.MAX_LONG_POLL_WAIT_TIME.TotalSeconds)
{
throw new ArgumentException(string.Format("The argument waitTimeSeconds is larger than '{0}', which is the maximum value allowed", SqsUtils.MAX_LONG_POLL_WAIT_TIME.TotalSeconds));
}
if (maxNumberOfMessages > SqsUtils.MAX_NUMBER_OF_MESSAGES_TO_FETCH)
{
throw new ArgumentException(string.Format("The argument maxNumberOfMessages is larger than '{0}', which is the maximum value allowed", SqsUtils.MAX_NUMBER_OF_MESSAGES_TO_FETCH));
}
// Perform request
var response = Invoke(() =>
_client.ReceiveMessage(new ReceiveMessageRequest {
QueueUrl = GetQueueUrl(queueName.Value),
WaitTimeSeconds = (int)waitTimeSeconds.TotalSeconds,
MaxNumberOfMessages = (int)maxNumberOfMessages
}),
queueName,
RECEIVING_MESSAGE
);
AssertSuccessfulStatusCode(response.HttpStatusCode, queueName, RECEIVING_MESSAGE);
return(response.Messages.Select(msg => new SqsMessage(new SqsMessageId(msg.MessageId), new SqsMessageReceipt(msg.ReceiptHandle), msg.Body)).ToArray());
}
//--- Constructors ---
/// <summary>
/// Constructor for creating an instance.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="callback">Callback for received SQS messages.</param>
/// <param name="longPollInterval">Max amount of time to wait for SQS message to arrive.</param>
/// <param name="maxNumberOfMessages">Max number of SQS messages to request.</param>
/// <param name="waitTimeOnError">Amount of time to wait until trying again to listen after an error occurred.</param>
public SqsPollingClientSettings(SqsQueueName queueName, Action <IEnumerable <SqsMessage> > callback, TimeSpan longPollInterval, uint maxNumberOfMessages, TimeSpan waitTimeOnError)
{
if (callback == null)
{
throw new ArgumentNullException("callback");
}
if (longPollInterval == null)
{
throw new ArgumentNullException("longPollInterval");
}
if (longPollInterval > 20.Seconds())
{
throw new ArgumentException("longPollInterval exceeds the limit allowed");
}
if (waitTimeOnError == null)
{
throw new ArgumentNullException("waitTimeOnError");
}
if (waitTimeOnError < 0.Seconds() || waitTimeOnError > 5.Minutes())
{
throw new ArgumentException("waitTimeOnError must be greater than 0 up to 5 minutes");
}
this.QueueName = queueName;
this.Callback = callback;
this.LongPollInterval = longPollInterval;
this.MaxNumberOfMessages = maxNumberOfMessages;
this.WaitTimeOnError = waitTimeOnError;
}
private List <QueueEntry> GetQueue(SqsQueueName queueName)
{
lock (_queues) {
List <QueueEntry> msgQueue;
_queues.TryGetValue(queueName, out msgQueue);
return(msgQueue);
}
}
//--- Methods ---
/// <summary>
/// Delete messages from named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messages">Enumeration of messages to delete.</param>
/// <returns>Enumeration of messages that failed to delete.</returns>
public IEnumerable <SqsMessageId> DeleteMessages(SqsQueueName queueName, IEnumerable <SqsMessage> messages)
{
foreach (var message in messages)
{
DeleteMessage(queueName, message.MessageReceipt);
}
return(new SqsMessageId[0]);
}
public void sending_a_message_to_unknown_queue_throws_an_amazon_sqs_exception()
{
// Setup
var queue = new SqsQueueName("unknown-queue");
// Act
_client.SendMessage(queue, new XDoc("event").Attr("id", 1).ToCompactString());
}
//--- Constructors ---
/// <summary>
/// Constructor for creating an instance.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="client">ISqsClient instance.</param>
public SqsQueueClient(SqsQueueName queueName, ISqsClient client)
{
if(client == null) {
throw new ArgumentNullException("client");
}
this.QueueName = queueName;
_client = client;
}
/// <summary>
/// Send one or more message to a named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBodies">Enumeration of message bodies.</param>
/// <returns>Enumeration of message bodies that failed to send.</returns>
public IEnumerable <string> SendMessages(SqsQueueName queueName, IEnumerable <string> messageBodies)
{
foreach (var messageBody in messageBodies)
{
SendMessage(queueName, messageBody);
}
return(Enumerable.Empty <string>());
}
//--- Constructors ---
/// <summary>
/// Constructor for creating an instance.
/// </summary>
/// <param name="client">ISqsClient instance.</param>
/// <param name="queueName">Queue name.</param>
/// <param name="timerFactory">TimerFactory instance.</param>
public SqsQueueDelayedSendClient(ISqsClient client, SqsQueueName queueName, TaskTimerFactory timerFactory)
{
if(client == null) {
throw new ArgumentNullException("client");
}
this.QueueName = queueName;
_client = client;
_timedSendAccumulator = new TimedAccumulator<KeyValuePair<int, string>>(items => AsyncUtil.ForkBackgroundSender(() => BatchSendMessages(items)), SqsUtils.MAX_NUMBER_OF_BATCH_SEND_MESSAGES, AUTOFLUSH_TIME, timerFactory);
}
//--- Constructors ---
/// <summary>
/// Constructor for creating an instance.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="client">ISqsClient instance.</param>
public SqsQueueClient(SqsQueueName queueName, ISqsClient client)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
this.QueueName = queueName;
_client = client;
}
private static T Invoke <T>(Func <T> function, SqsQueueName queueName, string sqsOperation)
{
try {
return(function());
} catch (AmazonSQSException e) {
throw new SqsException(string.Format("There was an SQS error '{0}', from the '{1}' SQS queue", sqsOperation, queueName.Value), e);
} catch (Exception e) {
throw new SqsException(string.Format("There was an error '{0}', from the '{1}' SQS queue", sqsOperation, queueName.Value), e);
}
}
//--- Constructors ---
/// <summary>
/// Constructor for creating an instance.
/// </summary>
/// <param name="client">ISqsClient instance.</param>
/// <param name="queueName">Queue name.</param>
/// <param name="timerFactory">TimerFactory instance.</param>
public SqsQueueDelayedSendClient(ISqsClient client, SqsQueueName queueName, TaskTimerFactory timerFactory)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
this.QueueName = queueName;
_client = client;
_timedSendAccumulator = new TimedAccumulator <KeyValuePair <int, string> >(items => AsyncUtil.ForkBackgroundSender(() => BatchSendMessages(items)), SqsUtils.MAX_NUMBER_OF_BATCH_SEND_MESSAGES, AUTOFLUSH_TIME, timerFactory);
}
/// <summary>
/// Delete a named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>True if the named queue was deleted</returns>
public bool DeleteQueue(SqsQueueName queueName)
{
lock (_queues) {
if (_queues.ContainsKey(queueName))
{
_queues.Remove(queueName);
}
return(true);
}
}
/// <summary>
/// Send message on named queue with a visibility delay.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
/// <param name="delay">Time to wait until the message becomes visible.</param>
public void SendMessage(SqsQueueName queueName, string messageBody, TimeSpan delay)
{
var msgQueue = GetQueue(queueName);
AssertQueueIsNotNull(queueName, msgQueue);
lock (msgQueue) {
var entry = new QueueEntry(new SqsMessage(new SqsMessageId(Guid.NewGuid().ToString()), new SqsMessageReceipt(Guid.NewGuid().ToString()), messageBody), DateTime.MinValue);
msgQueue.Add(entry);
}
}
/// <summary>
/// Create a new named queue and gets its URI.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>True if the named queue was created.</returns>
public bool CreateQueue(SqsQueueName queueName)
{
lock (_queues) {
if (!_queues.ContainsKey(queueName))
{
_queues[queueName] = new List <QueueEntry>();
}
return(true);
}
}
public void Can_round_trip_message_through_queue()
{
var sqs = new InMemorySqsClient();
var queueName = new SqsQueueName("bar");
sqs.CreateQueue(queueName);
sqs.SendMessage(queueName, "msg body");
var messages = sqs.ReceiveMessages(queueName, 0.Seconds(), 10);
Assert.AreEqual(1, messages.Count());
var received = messages.First();
Assert.AreEqual("msg body", received.Body);
}
/// <summary>
/// Delete a named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>True if the named queue was deleted</returns>
public bool DeleteQueue(SqsQueueName queueName)
{
var response = Invoke(() =>
_client.DeleteQueue(new DeleteQueueRequest {
QueueUrl = GetQueueUrl(queueName.Value)
}),
queueName,
DELETING_QUEUE
);
return(response.HttpStatusCode == HttpStatusCode.OK);
}
/// <summary>
/// Create a new named queue and gets its URI.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>True if the named queue was created.</returns>
public bool CreateQueue(SqsQueueName queueName)
{
var response = Invoke(() =>
_client.CreateQueue(new CreateQueueRequest {
QueueName = queueName.Value
}),
queueName,
CREATING_QUEUE
);
return(response.HttpStatusCode == HttpStatusCode.OK);
}
public void Can_create_and_delete_queues()
{
var sqs = new InMemorySqsClient();
var queueName = new SqsQueueName("bar");
sqs.CreateQueue(queueName);
var queues = sqs.ListQueues(null);
Assert.AreEqual(1, queues.Count());
Assert.AreEqual("bar", queues.First());
sqs.DeleteQueue(queueName);
queues = sqs.ListQueues(null);
Assert.IsFalse(queues.Any());
}
public void sending_a_message_with_a_delay_works()
{
// Setup
var queue = new SqsQueueName("unknown-queue");
// Act
for(int i = 0; i < 10; i++) {
_client.SendMessage(queue, new XDoc("event")
.Start("page")
.Elem("page", "/a/b/c")
.End().ToCompactString(), 30.Seconds());
}
}
/// <summary>
/// Get enumeration of all messages that are currently held by the in-memory named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>Enumeration of messages.</returns>
public IEnumerable <SqsMessage> InspectQueue(SqsQueueName queueName)
{
lock (_queues) {
var msgQueue = GetQueue(queueName);
if (msgQueue == null)
{
return(new SqsMessage[0]);
}
lock (msgQueue) {
return(msgQueue.Select(x => x.Message).ToArray());
}
}
}
/// <summary>
/// Removed all messages from named queue.
/// </summary>
/// <param name="queueName">Queue name</param>
public void ClearQueue(SqsQueueName queueName)
{
lock (_queues) {
var msgQueue = GetQueue(queueName);
if (msgQueue == null)
{
return;
}
lock (msgQueue) {
msgQueue.Clear();
}
}
}
/// <summary>
/// Send message on named queue with a visibility delay.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
/// <param name="delay">Time to wait until the message becomes visible.</param>
public void SendMessage(SqsQueueName queueName, string messageBody, TimeSpan delay)
{
var response = Invoke(() =>
_client.SendMessage(new SendMessageRequest {
QueueUrl = GetQueueUrl(queueName.Value),
MessageBody = messageBody,
DelaySeconds = (int)delay.TotalSeconds,
MessageAttributes = GetQueueNameAttribute(queueName.Value)
}),
queueName,
SENDING_MESSAGE);
AssertSuccessfulStatusCode(response.HttpStatusCode, queueName, SENDING_MESSAGE);
}
/// <summary>
/// Delete single message from named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageReceipt">Message receipt.</param>
/// <returns>True if message was deleted.</returns>
public bool DeleteMessage(SqsQueueName queueName, SqsMessageReceipt messageReceipt)
{
var response = Invoke(() =>
_client.DeleteMessage(new DeleteMessageRequest {
QueueUrl = GetQueueUrl(queueName.Value),
ReceiptHandle = messageReceipt.Value
}),
queueName,
DELETING_MESSAGE
);
AssertSuccessfulStatusCode(response.HttpStatusCode, queueName, DELETING_MESSAGE);
return(response.HttpStatusCode == HttpStatusCode.OK);
}
/// <summary>
/// Delete single message from named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageReceipt">Message receipt.</param>
/// <returns>True if message was deleted.</returns>
public bool DeleteMessage(SqsQueueName queueName, SqsMessageReceipt messageReceipt)
{
var msgQueue = GetQueue(queueName);
AssertQueueIsNotNull(queueName, msgQueue);
lock (msgQueue) {
var entry = msgQueue.FirstOrDefault(x => x.Message.MessageReceipt == messageReceipt);
if (entry != null)
{
msgQueue.Remove(entry);
}
}
return(true);
}
public void creating_a_queue_that_is_already_created_multiple_times_always_returns_http_200_responses()
{
// This assumes that'test-queue' is a queue that has already been created
// And that you can create queues in SQS
var queueName = new SqsQueueName("test-queue");
// Create the queue for the first time
var queue1Success = _client.CreateQueue(queueName);
Assert.IsTrue(queue1Success, "Creating queue first time failed");
// Try to create the queue for the second time
var queue2Success = _client.CreateQueue(queueName);
Assert.IsTrue(queue2Success, "Creating queue second time failed");
}
/// <summary>
/// Get delegate for enqueuing messages asynchronously to named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>Delegate for enqueuing message asynchronously.</returns>
public Action <string> GetEnqueueMessageCallback(SqsQueueName queueName)
{
repeat:
SqsQueueDelayedSendClient queue;
var directory = _directory;
if (!directory.TryGetValue(queueName.Value, out queue))
{
var newDirectory = new Dictionary <string, SqsQueueDelayedSendClient>(directory);
newDirectory[queueName.Value] = queue = new SqsQueueDelayedSendClient(_client, queueName, _timerFactory);
if (!SysUtil.CAS(ref _directory, directory, newDirectory))
{
goto repeat;
}
}
return(queue.EnqueueMessage);
}
public void polling_client_pulls_from_sqs_and_calls_callback()
{
var mockSqsClient = new MockSqsClient();
mockSqsClient.FillQueue(15);
var pollster = new SqsPollingClient(mockSqsClient);
Assert.AreEqual(15, mockSqsClient.Queued.Count, "queue was accessed prematurely");
var posted = new List<SqsMessage>();
var fooQueue = new SqsQueueName("foo");
pollster.Listen(new SqsPollingClientSettings(
queueName: fooQueue,
callback: messages => {
posted.AddRange(messages);
foreach(var msg in messages) {
mockSqsClient.DeleteMessage(fooQueue, msg.MessageReceipt);
}
},
longPollInterval: 0.Seconds(),
maxNumberOfMessages: SqsUtils.MAX_NUMBER_OF_MESSAGES_TO_FETCH,
waitTimeOnError: 1.Seconds()));
Assert.IsTrue(Wait.For(() => mockSqsClient.Queued.Count == 0, 10.Seconds()), "queue did not get depleted in time");
Assert.IsTrue(
Wait.For(() => mockSqsClient.ReceiveCalled > 0, 5.Seconds()),
string.Format("receive called the wrong number of times: Expected {0} != {1}", 3, mockSqsClient.ReceiveCalled)
);
Assert.AreEqual(15, mockSqsClient.Delivered.Count, "delivered has the wrong number of messages");
// Compare delivered and deleted
Assert.AreEqual(mockSqsClient.Delivered.Count(), mockSqsClient.Deleted.Count(), "The count of delivered messages and deleted messages does not match and it must");
for(var i = 0; i < mockSqsClient.Delivered.Count(); i++) {
Assert.AreEqual(
mockSqsClient.Delivered[i].MessageReceipt,
mockSqsClient.Deleted[i],
"delivered message and deleted message don't match on index " + i);
}
Assert.AreEqual(mockSqsClient.Delivered.Count(), posted.Count(), "The number of delivered messages and posted messages does not match and it should");
for(var i = 0; i < mockSqsClient.Delivered.Count(); i++) {
Assert.AreEqual(
mockSqsClient.Delivered[i],
posted[i],
"delivered and posted don't match");
}
}
/// <summary>
/// Delete messages from named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messages">Enumeration of messages to delete.</param>
/// <returns>Enumeration of messages that failed to delete.</returns>
public IEnumerable <SqsMessageId> DeleteMessages(SqsQueueName queueName, IEnumerable <SqsMessage> messages)
{
if (messages.Count() > SqsUtils.MAX_NUMBER_OF_BATCH_DELETE_MESSAGES)
{
throw new ArgumentException(string.Format("messageReceipts is larger than {0}, which is the maximum", SqsUtils.MAX_NUMBER_OF_BATCH_DELETE_MESSAGES));
}
var deleteEntries = messages.Distinct(message => message.MessageId.Value).Select(message => new DeleteMessageBatchRequestEntry {
Id = message.MessageId.Value, ReceiptHandle = message.MessageReceipt.Value
}).ToList();
var response = Invoke(() =>
_client.DeleteMessageBatch(new DeleteMessageBatchRequest {
QueueUrl = GetQueueUrl(queueName.Value),
Entries = deleteEntries
}),
queueName,
BATCH_DELETING_MESSAGES);
AssertSuccessfulStatusCode(response.HttpStatusCode, queueName, BATCH_DELETING_MESSAGES);
return(response.Failed.Select(failed => new SqsMessageId(failed.Id)).ToArray());
}
//--- Constructors ---
/// <summary>
/// Constructor for creating an instance.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="callback">Callback for received SQS messages.</param>
/// <param name="longPollInterval">Max amount of time to wait for SQS message to arrive.</param>
/// <param name="maxNumberOfMessages">Max number of SQS messages to request.</param>
/// <param name="waitTimeOnError">Amount of time to wait until trying again to listen after an error occurred.</param>
public SqsPollingClientSettings(SqsQueueName queueName, Action<IEnumerable<SqsMessage>> callback, TimeSpan longPollInterval, uint maxNumberOfMessages, TimeSpan waitTimeOnError)
{
if(callback == null) {
throw new ArgumentNullException("callback");
}
if(longPollInterval == null) {
throw new ArgumentNullException("longPollInterval");
}
if(longPollInterval > 20.Seconds()) {
throw new ArgumentException("longPollInterval exceeds the limit allowed");
}
if(waitTimeOnError == null) {
throw new ArgumentNullException("waitTimeOnError");
}
if(waitTimeOnError < 0.Seconds() || waitTimeOnError > 5.Minutes()) {
throw new ArgumentException("waitTimeOnError must be greater than 0 up to 5 minutes");
}
this.QueueName = queueName;
this.Callback = callback;
this.LongPollInterval = longPollInterval;
this.MaxNumberOfMessages = maxNumberOfMessages;
this.WaitTimeOnError = waitTimeOnError;
}
/// <summary>
/// Receive zero or more messages from name queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="waitTimeSeconds">Max amount of time to wait until this method returns.</param>
/// <param name="maxNumberOfMessages">Max number of messages to request.</param>
/// <returns>Enumeration of received messages.</returns>
public IEnumerable <SqsMessage> ReceiveMessages(SqsQueueName queueName, TimeSpan waitTimeSeconds, uint maxNumberOfMessages)
{
var start = GlobalClock.UtcNow;
// keep checking for messages until the wait-timeout kicks in
while (true)
{
var msgQueue = GetQueue(queueName);
AssertQueueIsNotNull(queueName, msgQueue);
QueueEntry[] entries;
var now = GlobalClock.UtcNow;
lock (msgQueue) {
var visibilityTimeout = 30.Seconds();
entries = msgQueue
.Where(x => x.VisibleTime <= now)
.OrderBy(x => _random.Next())
.Take(10)
.ToArray();
foreach (var entry in entries)
{
entry.VisibleTime = now + visibilityTimeout;
}
}
if (entries.Any())
{
return(entries.Select(e => new SqsMessage(e.Message.MessageId, e.Message.MessageReceipt, e.Message.Body)).ToArray());
}
if ((now - start) > waitTimeSeconds)
{
return(Enumerable.Empty <SqsMessage>());
}
// no message found; go to sleep for 100ms and try again
AsyncUtil.Sleep(100.Milliseconds());
}
}
/// <summary>
/// Send message on named queue with a visibility delay.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
/// <param name="delay">Time to wait until the message becomes visible.</param>
public void SendMessage(SqsQueueName queueName, string messageBody, TimeSpan delay)
{
var msgQueue = GetQueue(queueName);
AssertQueueIsNotNull(queueName, msgQueue);
lock(msgQueue) {
var entry = new QueueEntry(new SqsMessage(new SqsMessageId(Guid.NewGuid().ToString()), new SqsMessageReceipt(Guid.NewGuid().ToString()), messageBody), DateTime.MinValue);
msgQueue.Add(entry);
}
}
/// <summary>
/// Receive zero or more messages from name queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="waitTimeSeconds">Max amount of time to wait until this method returns.</param>
/// <param name="maxNumberOfMessages">Max number of messages to request.</param>
/// <returns>Enumeration of received messages.</returns>
public IEnumerable<SqsMessage> ReceiveMessages(SqsQueueName queueName, TimeSpan waitTimeSeconds, uint maxNumberOfMessages)
{
var start = GlobalClock.UtcNow;
// keep checking for messages until the wait-timeout kicks in
while(true) {
var msgQueue = GetQueue(queueName);
AssertQueueIsNotNull(queueName, msgQueue);
QueueEntry[] entries;
var now = GlobalClock.UtcNow;
lock(msgQueue) {
var visibilityTimeout = 30.Seconds();
entries = msgQueue
.Where(x => x.VisibleTime <= now)
.OrderBy(x => _random.Next())
.Take(10)
.ToArray();
foreach(var entry in entries) {
entry.VisibleTime = now + visibilityTimeout;
}
}
if(entries.Any()) {
return entries.Select(e => new SqsMessage(e.Message.MessageId, e.Message.MessageReceipt, e.Message.Body)).ToArray();
}
if((now - start) > waitTimeSeconds) {
return Enumerable.Empty<SqsMessage>();
}
// no message found; go to sleep for 100ms and try again
AsyncUtil.Sleep(100.Milliseconds());
}
}
/// <summary>
/// Get enumeration of all messages that are currently held by the in-memory named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>Enumeration of messages.</returns>
public IEnumerable<SqsMessage> InspectQueue(SqsQueueName queueName)
{
lock(_queues) {
var msgQueue = GetQueue(queueName);
if(msgQueue == null) {
return new SqsMessage[0];
}
lock(msgQueue) {
return msgQueue.Select(x => x.Message).ToArray();
}
}
}
/// <summary>
/// Removed all messages from named queue.
/// </summary>
/// <param name="queueName">Queue name</param>
public void ClearQueue(SqsQueueName queueName)
{
lock(_queues) {
var msgQueue = GetQueue(queueName);
if(msgQueue == null) {
return;
}
lock(msgQueue) {
msgQueue.Clear();
}
}
}
private void AssertQueueIsNotNull(SqsQueueName queueName, List<QueueEntry> queue)
{
if(queue == null) {
throw new InMemorySqsNullQueueException(string.Format("Queue '{0}' is null", queueName));
}
}
public bool DeleteQueue(SqsQueueName queueName)
{
throw new NotImplementedException();
}
public void polling_client_pulls_from_sqs_and_calls_callback_but_does_not_automatically_deletes_messages()
{
var mockSqsClient = new MockSqsClient();
mockSqsClient.FillQueue(15);
var pollster = new SqsPollingClient(mockSqsClient);
Assert.AreEqual(15, mockSqsClient.Queued.Count, "queue was accessed prematurely");
var posted = new List<SqsMessage>();
var queueName = new SqsQueueName("foo");
pollster.Listen(new SqsPollingClientSettings(
queueName: queueName,
callback: posted.AddRange,
longPollInterval: 10.Seconds(),
maxNumberOfMessages: SqsUtils.MAX_NUMBER_OF_MESSAGES_TO_FETCH,
waitTimeOnError: 1.Seconds()));
Assert.IsTrue(Wait.For(() => mockSqsClient.Queued.Count == 0, 10.Seconds()), "queue did not get depleted in time");
Assert.IsTrue(
Wait.For(() => mockSqsClient.ReceiveCalled > 0, 5.Seconds()),
string.Format("receive called the wrong number of times: {0} != {1}", 3, mockSqsClient.ReceiveCalled)
);
Assert.AreEqual(15, mockSqsClient.Delivered.Count, "delivered has the wrong number of messages");
Assert.AreNotEqual(
mockSqsClient.Delivered.Count,
mockSqsClient.Deleted.Count,
"delivered and deleted don't match");
Assert.AreEqual(
mockSqsClient.Delivered.Count,
posted.Count,
"delivered and posted don't match");
}
public IEnumerable<string> SendMessages(SqsQueueName queueName, IEnumerable<string> messageBodies)
{
throw new NotImplementedException();
}
//--- Methods ---
/// <summary>
/// Enqueue message for batched, asynchronous delivery.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
public void EnqueueMessage(SqsQueueName queueName, string messageBody)
{
GetEnqueueMessageCallback(queueName)(messageBody);
}
/// <summary>
/// Get delegate for enqueuing messages asynchronously to named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>Delegate for enqueuing message asynchronously.</returns>
public Action<string> GetEnqueueMessageCallback(SqsQueueName queueName)
{
repeat:
SqsQueueDelayedSendClient queue;
var directory = _directory;
if(!directory.TryGetValue(queueName.Value, out queue)) {
var newDirectory = new Dictionary<string, SqsQueueDelayedSendClient>(directory);
newDirectory[queueName.Value] = queue = new SqsQueueDelayedSendClient(_client, queueName, _timerFactory);
if(!SysUtil.CAS(ref _directory, directory, newDirectory)) {
goto repeat;
}
}
return queue.EnqueueMessage;
}
public void SendMessage(SqsQueueName queueName, string messageBody)
{
throw new NotImplementedException();
}
/// <summary>
/// Send message on named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
public void SendMessage(SqsQueueName queueName, string messageBody)
{
SendMessage(queueName, messageBody, TimeSpan.Zero);
}
/// <summary>
/// Send message on named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
public void SendMessage(SqsQueueName queueName, string messageBody)
{
SendMessage(queueName, messageBody, TimeSpan.Zero);
}
/// <summary>
/// Send one or more message to a named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBodies">Enumeration of message bodies.</param>
/// <returns>Enumeration of message bodies that failed to send.</returns>
public IEnumerable<string> SendMessages(SqsQueueName queueName, IEnumerable<string> messageBodies)
{
foreach(var messageBody in messageBodies) {
SendMessage(queueName, messageBody);
}
return Enumerable.Empty<string>();
}
public IEnumerable<SqsMessage> ReceiveMessages(SqsQueueName queueName, TimeSpan waitTimeSeconds, uint maxNumberOfMessages)
{
ReceiveCalled++;
var take = (int)Math.Min(10, maxNumberOfMessages);
var taken = Queued.Take(take).ToArray();
_log.DebugFormat("receive returning {0} messages", taken.Length);
Delivered.AddRange(taken);
Queued.RemoveRange(0, taken.Length);
return taken;
}
private List<QueueEntry> GetQueue(SqsQueueName queueName)
{
lock(_queues) {
List<QueueEntry> msgQueue;
_queues.TryGetValue(queueName, out msgQueue);
return msgQueue;
}
}
/// <summary>
/// Create a new named queue and gets its URI.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>True if the named queue was created.</returns>
public bool CreateQueue(SqsQueueName queueName)
{
lock(_queues) {
if(!_queues.ContainsKey(queueName)) {
_queues[queueName] = new List<QueueEntry>();
}
return true;
}
}
//--- Methods ---
/// <summary>
/// Enqueue message for batched, asynchronous delivery.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageBody">Message body.</param>
public void EnqueueMessage(SqsQueueName queueName, string messageBody)
{
GetEnqueueMessageCallback(queueName)(messageBody);
}
/// <summary>
/// Delete single message from named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <param name="messageReceipt">Message receipt.</param>
/// <returns>True if message was deleted.</returns>
public bool DeleteMessage(SqsQueueName queueName, SqsMessageReceipt messageReceipt)
{
var msgQueue = GetQueue(queueName);
AssertQueueIsNotNull(queueName, msgQueue);
lock(msgQueue) {
var entry = msgQueue.FirstOrDefault(x => x.Message.MessageReceipt == messageReceipt);
if(entry != null) {
msgQueue.Remove(entry);
}
}
return true;
}
public bool DeleteMessage(SqsQueueName queueName, SqsMessageReceipt messageReceipt)
{
_log.DebugFormat("deleting {0}", messageReceipt);
Deleted.Add(messageReceipt);
return true;
}
/// <summary>
/// Delete a named queue.
/// </summary>
/// <param name="queueName">Queue name.</param>
/// <returns>True if the named queue was deleted</returns>
public bool DeleteQueue(SqsQueueName queueName)
{
lock(_queues) {
if(_queues.ContainsKey(queueName)) {
_queues.Remove(queueName);
}
return true;
}
}