FIFA Connect Service Bus .NET SDK, v3.0

1. Introduction

Main responsibility of FIFA Connect ID Service Bus is to provide unified infrastructure for asynchronous messaging. Using FIFA Connect Service Bus and its SDK it is possible to exchange encrypted messages with other applications connected to the bus.

1.1 Prerequisites

SDK libraries to reference:

1.2 How encryption works in Connect Service Bus

FIFA Connect Service Bus provides end-to-end encryption which means that message is encrypted in SDK of sending party and is decrypted in SDK or receiving party. Consequently none of the devices transferring message (including FIFA Connect Service Bus servers) can read its content.

Such a feature of Connect Service Bus is possible due to usage of infrastructure based on public and private pairs of certificates. This section briefly describes how this is achieved.

  1. Using provided tools Administrator of organization "A" generates pair of public and private certificates. Public certificate can be shared with anyone (e.g. uploaded on a server) but private key should be kept in secret.
  2. Administrator of organization "A" uploads public certificates to FIFA Connect Service Bus server using provided tool.
  3. Now application of organization "B" wants to send an encrypted message to Organization "A". Then the code in application calls Connect Service Bus SDK which in a seamless way:
  1. Then application of Organization A using SDK receives message. Under the hood SDK

2. FIFA Connect Service Bus Client

2.1 Creating a client

The entry point of the SDK is FifaConnectServiceBusClient. With a single instance of this class all the requests can be made. In order to authenticate to the service you have to provide a set of client credentials.

2.1.1 Setup private certificate

In order to create a new instance of the client, instance of IPrivateKeyStorage must be provided. By default SDK uses PrivateKeyMemoryStorage class that implements mentioned interface. Next step is to provide instance(s) of X509Certificate2 into such container. Each certificate consists of the key (from generated file) and password (optionally). Please take a look at the following example:

var certificate = new X509Certificate2();
certificate.Import(privateKey, "password", X509KeyStorageFlags.DefaultKeySet);

var privateStore = new PrivateKeyMemoryStorage(certificate);

2.1.2 Generate new certificate

In order to generate a new certificate follow instructions from fifa-connectservicebus-certificates-generation.html. When a new pair of certificates (public and private) is generated and a new public certificate is uploaded, then it's required to update collection of private certificates returned by implementation of IPrivateKeyStorage. Since some messages could be encrypted before new public certificate was uploaded, implementation of IPrivateKeyStorage must return current and previous private certificate to ensure that all messages can be decrypted.

Correct order of steps is the following:

  1. Generate pair of certificates
  2. Modify and deploy code so that IPrivateKeyStorage returns old and new private certificates
  3. Upload new public certificate to Connect Service Bus

Please take a look at the following example, where two certificates are used by IPrivateKeyStorage:

var environment = ConnectServiceBusEnvironment.Beta;
var credentials = new ClientCredentials("clientId", "secretKey");

var certificate = new X509Certificate2();
certificate.Import(TestResources.cert_pfx, "Testing123", X509KeyStorageFlags.DefaultKeySet);

var oldCertificate = new X509Certificate2();
oldCertificate.Import(TestResources.old_cert_pfx, "Testing123", X509KeyStorageFlags.DefaultKeySet);

var privateStore = new PrivateKeyMemoryStorage(certificate, oldCertificate);

2.1.3 Basic instance

var environment = ConnectServiceBusEnvironment.Beta;
var credentials = new ClientCredentials("clientId", "secretKey");
var client = new FifaConnectServiceBusClient(environment, credentials, privateStore);

where environment is an instance of type ConnectServiceBusEnvironment. It provides information about the service to make request to.

2.1.4 Logging

By default, the above constructor uses a NullLogger, which does nothing. However, to use logging, provide your own implementation of ILogger.

var environment = ConnectServiceBusEnvironment.Beta;
var credentials = new ClientCredentials("clientId", "secretKey");
var logger = new YourOwnLogger();
var client = new FifaConnectServiceBusClient(environment, credentials, privateStore, logger);;

2.1.5 Certificate client instance

In case of need for upload or download certificate, you have to use an instance of FifaConnectServiceBusCertificateClient.

var environment = ConnectServiceBusEnvironment.Beta;
var credentials = new ClientCredentials("clientId", "secretKey");

var certificateClient = new FifaConnectServiceBusCertificateClient(environment, credentials);

2.1.6 Disable encryption

Encryption can be disabled using setUseEncryption() method from FifaConnectServiceBusClient instance.

var environment = ConnectServiceBusEnvironment.Beta;
var credentials = new ClientCredentials("clientId", "secretKey");

var client = new FifaConnectServiceBusClient(environment, credentials, new NullPrivateKeyProvider());
client.UseEncryption = false;

2.1.7 Addressing a message

Recipient of the message is specified by the recipient parameter. It's actually a name of a queue that acts as an inbox for other client (e.g. registration system in a different MA)

2.1.8 Creating custom environment instance

As there are some pre-defined environments defined in the ConnectServiceBusEnvironment class, it's also possible to create a custom instance using environment code. In order to achieve that, environment code needs to be provided to the static factory method.

var environmentCode = "testenv";
var environment = ConnectServiceBusEnvironment.Create(environmentCode);

Use one of the existing environments:

Environment Environment code
Integration int
Test test
Beta beta
Preproduction prep
Production prod
Sandbox #1 sbx1

2.2 Sending a message

In order to send a message in FIFA Connect Service Bus service, provide content as byte[]. A recipient needs to be provided as well.

By convention value of the recipient is the FIFA ID of the receiving organisation. However, for certain applications it may have format of FIFAID_application. In case of any doubts, please contact FIFA Connect Service Bus Support team to get proper value of recipient.

Example:

try
{
    await client.Send(recipient, content);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (PublicCertificateNotFoundException ex)
{
    // there is no public certificate for given queue
}
catch (CryptographyException ex)
{
    // exception when encrypting content
}
catch (QueueNotFoundException ex)
{
    // there is no queue for specified recipient
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

To send additional meta data of the message use overloaded send method:

var action = "/person/getDetails";
var properties = new Dictionary<string, string>();
properties.Add("id", "BVGE8T6");

await client.Send(recipient, content, action, properties);

2.3 Receive a message

Please note that the method is not transactional. Message is immediately removed from the queue. For transactional message processing use PeekLock method.

The timeout parameter can be specified. In Connect Service Bus context timeout defines how long a request waits before returning that there is no message in the queue. When no message is found, FifaConnectServiceBusClient will return null.

try
{
    var message = await client.Receive().ConfigureAwait(false);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (CryptographyException ex)
{
    // exception when encrypting content
}
catch (QueueNotFoundException ex)
{
    // there is no queue for specified recipient
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

2.4 Transactional receive

In order to receive a message from Connect Service Bus and leave it in the queue use PeekLock method. Received message will not be visible for other Connect Service Bus clients for 120 seconds. During that time period actions like Delete, Unlock or RenewLock can be triggered. If none of the above actions is taken, message will be returned to the queue.

In the Message some metadata can be found in property BrokerProperties. The most important are MessageId and LockToken that are used as required parameters in methods Delete, Unlock or RenewLock. In addition above properites can be found in instance of Message class.

try
{
    var message = client.PeekLock();
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (CryptographyException ex)
{
    // exception when encrypting content
}
catch (QueueNotFoundException ex)
{
    // there is no queue for specified recipient
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

2.5 Delete a message

Method used to delete a locked message.

try
{
    await client.Delete(message.Id, message.LockToken);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

2.6 Unlock a message

Message can be returned to the queue using Unlock method.

try
{
    await client.Unlock(message.Id, message.LockToken);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

2.7 Renew lock

Lock can be renewed for the next 120 seconds.

try
{
    await client.RenewLock(message.Id, message.LockToken);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

2.8 Upload a public certificate

Recommended way to upload a public certificate is the upload using console application located in certificate-upload-console folder. For more information please refer to Certificate Generation documentation. If console application can't be used, use UploadCertificate method instead. Take a look at the following example:

var certificateData = File.ReadAllBytes(certificateFilePath); // certificateFilePath: path to public_cert.pem file
try
{
    await client.UploadCertificate(certificateData);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

2.9 Download a public certificate

To download public certificate for specific organisation use DownloadCertificate method. Please take a look at the following example:

try
{
    var certificateRawData = await client.DownloadCertificate(queueIdentifier).ConfigureAwait(false);
}
catch (InvalidClientDataException ex)
{
    // data sent to the service was invalid
    var details = ex.BadRequestResponse;
}
catch (AuthenticationException ex)
{
    // invalid client credentials
}
catch (UnauthorizedException ex)
{
    // unauthorized
}
catch (DataNotFoundException ex)
{
    // certificate has not been found
}
catch (FifaConnectServiceBusException ex)
{
    // some other error occurred, see the details
    var response = ex.HttpOperationResponse;
}

3. Limits

3.1 Maximum queue size

Currently each recipient's queue has a quota of 80 GB (both content and message headers size is counted). When queue reaches its limit, new messages cannot be send to the recipient, so senders get an error from Service Bus API and SDK.

3.2. Maximum time-to-live

Each queue stores messages for 7 days. If message is not received by the recipient messages, it is moved to dead-letter queue and support team receives notification about unprocessed message. On client request support team can move a message to primary queue so that it can be received and processed by an application. Alternatively message can be permanently deleted from a dead-letter queue.

3.3. Maximum delivery retries

If client using Connect Service Bus SDK downloads message but fails to process it correctly (i.e. handler throws an exception), the counter of failed delivery is increased. If delivery fails 10 times, message is moved to a dead-letter queue. Depending on the reason different actions can be taken:

3.4 Maximum message size

Maximum message size is 10MB. If this limit is exceeded then Connect Service Bus will return 400 (Bad Request) response code. As a result InvalidClientDataException will be thrown.

3.5 Thread-safety

Any instance members are not guaranteed to be thread safe. In particular all methods on FifaConnectServiceBusClient cannot be called from multiple threads simultaneously. If needed, new instance of FifaConnectServiceBusClient should be created per thread.

4. Release notes

The following changes were introduced in version 3.0 of the SDK when comparing to version 2.1: