public void TestMissingMessages()
{
// arrange
var connectionMultiplexer = _redis.GetConnection();
var publisher = new ReliablePublisher(connectionMultiplexer);
var subscriber = new TogglingSubscriber(connectionMultiplexer, new MessageParser());
int receivedMessagesCount = 0;
const string channelName = "test-channel-" + nameof(TestMissingMessages);
var messageHandler = new MessageHandler((channel, msg) => Interlocked.Increment(ref receivedMessagesCount));
subscriber.Subscribe(channelName, messageHandler);
// act
publisher.Publish(channelName, "message1");
Wait(10);
subscriber.IsEnabled = false; // simulation of disability to process messages
publisher.Publish(channelName, "message2");
Wait(10);
subscriber.IsEnabled = true;
publisher.Publish(channelName, "message3");
Wait(10);
// assert
Assert.Equal(3, receivedMessagesCount);
}
public void GetSavedMessages()
{
// arrange
var connectionMultiplexer = _redis.GetConnection();
var publisher = new ReliablePublisher(connectionMultiplexer);
var loader = new MessageLoader(connectionMultiplexer);
// act
const string channelName = "test-channel-" + nameof(GetSavedMessages);
publisher.Publish(channelName, "message1");
publisher.Publish(channelName, "message2");
var savedMessages = loader.GetMessages(channelName, 0)
.ToList();
// assert
Assert.Equal(2, savedMessages.Count);
}
public void PublishTest()
{
// arrange
var channelName = "test-channel-" + nameof(PublishTest);
var publisher = new ReliablePublisher(_redis.GetConnection());
var receivedMessage = "";
var subscriber = _redis.GetConnection().GetSubscriber(); // standard, not-reliable subscriber
subscriber.Subscribe(channelName, (channel, message) => receivedMessage += message);
// act
publisher.Publish(channelName, "test message:my message");
Thread.Sleep(50);
// assert
Assert.Equal("1:test message:my message", receivedMessage);
}
public void PublishWillSaveMessageInRedis()
{
// arrange
var channelName = "test-channel-" + nameof(PublishWillSaveMessageInRedis);
var publisher = new ReliablePublisher(_redis.GetConnection());
// act
var messageExpiration = TimeSpan.FromSeconds(30);
publisher.Publish(channelName, "test message:my message", messageExpiration);
// assert
var database = _redis.GetConnection().GetDatabase();
var savedMessage = database.StringGetWithExpiry($"ch:{{{channelName}}}:1");
Assert.Equal("test message:my message", savedMessage.Value);
Assert.NotNull(savedMessage.Expiry);
Assert.True(savedMessage.Expiry > TimeSpan.Zero && savedMessage.Expiry < TimeSpan.FromSeconds(60), $"Timespan {savedMessage.Expiry} is not within given range.");
}
public void Publish(string channel, string message, TimeSpan messageExpiration = default)
{
_publisher.Publish(channel, message, messageExpiration);
}