public void LinkSensor(int id, string sensorId)
{
// Has a sensor already been linked?
var brewWithSensor = BrewRepository.GetAll().FirstOrDefault(b => b.SensorId == sensorId);
if (brewWithSensor != null && brewWithSensor.Id != id)
{
throw new ArgumentException(
string.Format("The sensor with id {0} can not be linked to the brew because the sensor has already been linked to another brew.", sensorId), "sensorId");
}
// Get the brew
var brew = GetBrew(id);
// First unlink the current sensor
if (!string.IsNullOrEmpty(brew.SensorId))
{
UnlinkSensor(id, brew.SensorId);
}
// Link sensor in our datastore
brew.SensorId = sensorId;
brew.LastModified = DateTime.UtcNow;
BrewRepository.CommitChanges();
// We want a custom identity for the sensor which only allows sending to the service bus.
var serviceManagementWrapper = new ServiceManagementWrapper(AcsNamespace, ManagementIssuer, ManagementKey);
var client = serviceManagementWrapper.CreateManagementServiceClient();
client.IgnoreResourceNotFoundException = true;
// Clean up if we already exist as a sensor
var existingRule = client.Rules.AddQueryOption("$filter", "Description eq '" + string.Format("Add Send claim value for sensor id {0}", sensorId) + "'").FirstOrDefault();
if (existingRule != null)
{
client.DeleteObject(existingRule);
client.SaveChanges(SaveChangesOptions.Batch);
}
serviceManagementWrapper.RemoveServiceIdentity(sensorId);
// Create a new identity
var serviceIdentity = new ServiceIdentity
{
Name = sensorId,
Description = string.Format("Sensor id: {0}", sensorId)
};
var serviceIdentityKey = new ServiceIdentityKey
{
DisplayName = string.Format("Credentials for {0}", sensorId),
Value = Encoding.UTF8.GetBytes(sensorId),
Type = IdentityKeyTypes.Symmetric.ToString(),
Usage = IdentityKeyUsages.Password.ToString(),
StartDate = DateTime.UtcNow,
EndDate = DateTime.UtcNow.AddMonths(2) // sensors can be linked for up to 2 months
};
// Process modifications to the namespace
client.AddToServiceIdentities(serviceIdentity);
client.AddRelatedObject(serviceIdentity, "ServiceIdentityKeys", serviceIdentityKey);
client.SaveChanges(SaveChangesOptions.Batch);
// Add a Send claim
var issuer = client.Issuers.AddQueryOption("$filter", "Name eq 'LOCAL AUTHORITY'").FirstOrDefault();
var ruleGroup = client.RuleGroups.AddQueryOption("$filter", "Name eq 'Default Rule Group for ServiceBus'").FirstOrDefault();
var rule = new Rule
{
Description = string.Format("Add Send claim value for sensor id {0}", sensorId),
InputClaimType = "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier",
InputClaimValue = sensorId,
OutputClaimType = "net.windows.servicebus.action",
OutputClaimValue = "Send",
IssuerId = issuer.Id,
RuleGroupId = ruleGroup.Id,
RuleGroup = ruleGroup,
Issuer = issuer
};
client.AddToRules(rule);
client.SaveChanges(SaveChangesOptions.Batch);
}
public void UnlinkSensor(int id, string sensorId)
{
// Disallow access to the service bus for this sensor
var serviceManagementWrapper = new ServiceManagementWrapper(AcsNamespace, ManagementIssuer, ManagementKey);
var client = serviceManagementWrapper.CreateManagementServiceClient();
client.IgnoreResourceNotFoundException = true;
// Clean up if we already exist as a sensor
var existingRule = client.Rules.AddQueryOption("$filter", "Description eq '" + string.Format("Add Send claim value for sensor id {0}", sensorId) + "'").FirstOrDefault();
if (existingRule != null)
{
client.DeleteObject(existingRule);
client.SaveChanges(SaveChangesOptions.Batch);
}
serviceManagementWrapper.RemoveServiceIdentity(sensorId);
// Unlink sensor in our datastore
var brew = GetBrew(id);
brew.SensorId = null;
brew.LastModified = DateTime.UtcNow;
BrewRepository.CommitChanges();
}