public SubscriptionDescription CreateSubscription(SubscriptionDescription description, Filter filter)
{
SqlFilter sf = filter as SqlFilter;
var value = sf.SqlExpression;
//we must parse on the first ' and then go to the end of the string -1 char
var index = value.IndexOf('\'');
var typeName = value.Substring(index + 1);
typeName = typeName.Substring(0, typeName.Length - 1).Replace("_", ".");
//NOTE Limit is test class must exist in this assembly for now.
var theType = this.GetType().Assembly.GetType(typeName);
_subscriptions.Add(new SubscriptionDescriptionState()
{
Description = description,
Type = theType
});
ServiceBusEnpointData endpoint = null;
if (_endpointMap.TryGetValue(description, out endpoint))
{
receiver.CreateSubscription(endpoint);
}
else
{
throw new Exception("Endpoint error");
}
return(description);
}
/// <summary>
/// Create a new Subscription.
/// </summary>
/// <param name="value">The data used to create the subscription</param>
public void CreateSubscription(ServiceBusEnpointData value) {
Guard.ArgumentNotNull(value, "value");
//TODO determine how we can change the filters for an existing registered item
//ServiceBusNamespaceClient
lock (lockObject) {
logger.Info("CreateSubscription {0} Declared {1} MessageTytpe {2}, IsReusable {3} Custom Attribute {4}",
value.SubscriptionName,
value.DeclaredType.ToString(),
value.MessageType.ToString(),
value.IsReusable,
value.AttributeData != null ? value.AttributeData.ToString() : string.Empty);
var helper = new AzureReceiverHelper(defaultTopic, configurationFactory, configuration, serializer, verifyRetryPolicy, retryPolicy, value);
mappings.Add(helper);
//helper.ProcessMessagesForSubscription();
//TODO make a config setting to allow us to run subscriptions on different threads or not.
//create a new thread for processing of the messages.
var t = new Thread(helper.ProcessMessagesForSubscription);
t.Name = value.SubscriptionName;
t.IsBackground = false;
t.Start();
} //lock end
}
/// <summary>
/// Create a new Subscription.
/// </summary>
/// <param name="value">The data used to create the subscription</param>
public void CreateSubscription(ServiceBusEnpointData value)
{
Guard.ArgumentNotNull(value, "value");
//TODO determine how we can change the filters for an existing registered item
//ServiceBusNamespaceClient
lock (lockObject) {
logger.Info("CreateSubscription {0} Declared {1} MessageTytpe {2}, IsReusable {3} Custom Attribute {4}",
value.SubscriptionName,
value.DeclaredType.ToString(),
value.MessageType.ToString(),
value.IsReusable,
value.AttributeData != null ? value.AttributeData.ToString() : string.Empty);
var helper = new AzureReceiverHelper(defaultTopic, configurationFactory, configuration, serializer, verifyRetryPolicy, retryPolicy, value);
mappings.Add(helper);
//helper.ProcessMessagesForSubscription();
//TODO make a config setting to allow us to run subscriptions on different threads or not.
//create a new thread for processing of the messages.
var t = new Thread(helper.ProcessMessagesForSubscription);
t.Name = value.SubscriptionName;
t.IsBackground = false;
t.Start();
} //lock end
}
/// <summary>
/// Cancel a subscription
/// </summary>
/// <param name="value">The data used to cancel the subscription</param>
public void CancelSubscription(ServiceBusEnpointData value)
{
Guard.ArgumentNotNull(value, "value");
logger.Info("CancelSubscription {0} Declared {1} MessageTytpe {2}, IsReusable {3}", value.SubscriptionName, value.DeclaredType.ToString(), value.MessageType.ToString(), value.IsReusable);
var subscription = mappings.FirstOrDefault(item => item.Data.EndPointData.SubscriptionName.Equals(value.SubscriptionName, StringComparison.OrdinalIgnoreCase));
if (subscription == null)
{
logger.Info("CancelSubscription Does not exist {0}", value.SubscriptionNameDebug);
return;
}
subscription.Data.Cancel();
Task t = Task.Factory.StartNew(() => {
//HACK find better way to wait for a cancel request so we are not blocking.
logger.Info("CancelSubscription Deleting {0}", value.SubscriptionNameDebug);
for (int i = 0; i < 100; i++)
{
if (!subscription.Data.Cancelled)
{
Thread.Sleep(1000);
}
else
{
break;
}
}
if (configurationFactory.NamespaceManager.SubscriptionExists(defaultTopic.Path, value.SubscriptionName))
{
var filter = new SqlFilter(string.Format(TYPE_HEADER_NAME + " = '{0}'", value.MessageType.FullName.Replace('.', '_')));
retryPolicy.ExecuteAction(() => configurationFactory.NamespaceManager.DeleteSubscription(defaultTopic.Path, value.SubscriptionName));
logger.Info("CancelSubscription Deleted {0}", value.SubscriptionNameDebug);
}
});
try {
Task.WaitAny(t);
}
catch (Exception ex) {
if (ex is AggregateException)
{
//do nothing
}
else
{
throw;
}
}
}
internal static void SubscribeOrUnsubscribeType(Action <string> logInfo, Type type, IBusConfiguration config, Action <ServiceBusEnpointData> callback)
{
Guard.ArgumentNotNull(type, "type");
Guard.ArgumentNotNull(callback, "callback");
logInfo(string.Format("SubscribeOrUnsubscribeType={0}", type.FullName));
var interfaces = type.GetInterfaces()
.Where(i => i.IsGenericType && (i.GetGenericTypeDefinition() == typeof(IHandleMessages <>) || i.GetGenericTypeDefinition() == typeof(IHandleCompetingMessages <>)))
.ToList();
if (interfaces.Count == 0)
{
throw new ApplicationException(string.Format("Type {0} does not implement IHandleMessages or IHandleCompetingMessages", type.FullName));
}
//for each interface we find, we need to register it with the bus.
foreach (var foundInterface in interfaces)
{
var implementedMessageType = foundInterface.GetGenericArguments()[0];
//due to the limits of 50 chars we will take the name and a MD5 for the name.
var hashName = implementedMessageType.FullName + "|" + type.FullName;
var hash = MD5Helper.CalculateMD5(hashName);
var fullName = (IsCompetingHandler(foundInterface) ? "C_" : config.ServiceBusApplicationId + "_") + hash;
var info = new ServiceBusEnpointData()
{
AttributeData = type.GetCustomAttributes(typeof(MessageHandlerConfigurationAttribute), false).FirstOrDefault() as MessageHandlerConfigurationAttribute,
DeclaredType = type,
MessageType = implementedMessageType,
SubscriptionName = fullName,
ServiceType = foundInterface
};
if (!config.Container.IsRegistered(type))
{
if (info.IsReusable)
{
config.Container.Register(type, type);
}
else
{
config.Container.Register(type, type, true);
}
}
callback(info);
}
config.Container.Build();
}
public AzureReceiverHelper(TopicDescription topic, IServiceBusConfigurationFactory configurationFactory, IBusConfiguration config, IServiceBusSerializer serializer, RetryPolicy verifyRetryPolicy, RetryPolicy retryPolicy, ServiceBusEnpointData endpoint) {
Guard.ArgumentNotNull(topic, "topic");
Guard.ArgumentNotNull(configurationFactory, "configurationFactory");
Guard.ArgumentNotNull(config, "config");
Guard.ArgumentNotNull(serializer, "serializer");
Guard.ArgumentNotNull(retryPolicy, "retryPolicy");
Guard.ArgumentNotNull(endpoint, "endpoint");
this.topic = topic;
this.configurationFactory = configurationFactory;
this.config = config;
this.serializer = serializer;
this.verifyRetryPolicy = verifyRetryPolicy;
this.retryPolicy = retryPolicy;
this.endpoint = endpoint;
Configure(endpoint);
}
internal static void SubscribeOrUnsubscribeType(Action<string> logInfo, Type type, IBusConfiguration config, Action<ServiceBusEnpointData> callback) {
Guard.ArgumentNotNull(type, "type");
Guard.ArgumentNotNull(callback, "callback");
logInfo(string.Format("SubscribeOrUnsubscribeType={0}", type.FullName));
var interfaces = type.GetInterfaces()
.Where(i => i.IsGenericType && (i.GetGenericTypeDefinition() == typeof(IHandleMessages<>) || i.GetGenericTypeDefinition() == typeof(IHandleCompetingMessages<>)))
.ToList();
if (interfaces.Count == 0) {
throw new ApplicationException(string.Format("Type {0} does not implement IHandleMessages or IHandleCompetingMessages", type.FullName));
}
//for each interface we find, we need to register it with the bus.
foreach (var foundInterface in interfaces) {
var implementedMessageType = foundInterface.GetGenericArguments()[0];
//due to the limits of 50 chars we will take the name and a MD5 for the name.
var hashName = implementedMessageType.FullName + "|" + type.FullName;
var hash = MD5Helper.CalculateMD5(hashName);
var fullName = (IsCompetingHandler(foundInterface) ? "C_" : config.ServiceBusApplicationId + "_") + hash;
var info = new ServiceBusEnpointData() {
AttributeData = type.GetCustomAttributes(typeof(MessageHandlerConfigurationAttribute), false).FirstOrDefault() as MessageHandlerConfigurationAttribute,
DeclaredType = type,
MessageType = implementedMessageType,
SubscriptionName = fullName,
ServiceType = foundInterface
};
if (!config.Container.IsRegistered(type)) {
if (info.IsReusable) {
config.Container.Register(type, type);
}
else {
config.Container.Register(type, type, true);
}
}
callback(info);
}
config.Container.Build();
}
/// <summary>
/// Cancel a subscription
/// </summary>
/// <param name="value">The data used to cancel the subscription</param>
public void CancelSubscription(ServiceBusEnpointData value) {
Guard.ArgumentNotNull(value, "value");
logger.Info("CancelSubscription {0} Declared {1} MessageTytpe {2}, IsReusable {3}", value.SubscriptionName, value.DeclaredType.ToString(), value.MessageType.ToString(), value.IsReusable);
var subscription = mappings.FirstOrDefault(item => item.Data.EndPointData.SubscriptionName.Equals(value.SubscriptionName, StringComparison.OrdinalIgnoreCase));
if (subscription == null) {
logger.Info("CancelSubscription Does not exist {0}", value.SubscriptionNameDebug);
return;
}
subscription.Data.Cancel();
Task t = Task.Factory.StartNew(() => {
//HACK find better way to wait for a cancel request so we are not blocking.
logger.Info("CancelSubscription Deleting {0}", value.SubscriptionNameDebug);
for (int i = 0; i < 100; i++) {
if (!subscription.Data.Cancelled) {
Thread.Sleep(1000);
}
else {
break;
}
}
if (configurationFactory.NamespaceManager.SubscriptionExists(defaultTopic.Path, value.SubscriptionName)) {
var filter = new SqlFilter(string.Format(TYPE_HEADER_NAME + " = '{0}'", value.MessageType.FullName.Replace('.', '_')));
retryPolicy.ExecuteAction(() => configurationFactory.NamespaceManager.DeleteSubscription(defaultTopic.Path, value.SubscriptionName));
logger.Info("CancelSubscription Deleted {0}", value.SubscriptionNameDebug);
}
});
try {
Task.WaitAny(t);
}
catch (Exception ex) {
if (ex is AggregateException) {
//do nothing
}
else {
throw;
}
}
}
public AzureReceiverHelper(TopicDescription topic, IServiceBusConfigurationFactory configurationFactory, IBusConfiguration config,
IServiceBusSerializer serializer, RetryPolicy verifyRetryPolicy, RetryPolicy retryPolicy, ServiceBusEnpointData endpoint)
{
Guard.ArgumentNotNull(topic, "topic");
Guard.ArgumentNotNull(configurationFactory, "configurationFactory");
Guard.ArgumentNotNull(config, "config");
Guard.ArgumentNotNull(serializer, "serializer");
Guard.ArgumentNotNull(retryPolicy, "retryPolicy");
Guard.ArgumentNotNull(endpoint, "endpoint");
this.topic = topic;
this.configurationFactory = configurationFactory;
this.config = config;
this.serializer = serializer;
this.verifyRetryPolicy = verifyRetryPolicy;
this.retryPolicy = retryPolicy;
this.endpoint = endpoint;
Configure(endpoint);
}
void Configure(ServiceBusEnpointData value) {
SubscriptionDescription desc = null;
bool createNew = false;
try {
logger.Info("CreateSubscription Try {0} ", value.SubscriptionNameDebug);
// First, let's see if a item with the specified name already exists.
verifyRetryPolicy.ExecuteAction(() => {
desc = configurationFactory.NamespaceManager.GetSubscription(topic.Path, value.SubscriptionName);
});
createNew = (desc == null);
}
catch (MessagingEntityNotFoundException) {
logger.Info("CreateSubscription Does Not Exist {0} ", value.SubscriptionNameDebug);
// Looks like the item does not exist. We should create a new one.
createNew = true;
}
// If a item with the specified name doesn't exist, it will be auto-created.
if (createNew) {
var descriptionToCreate = new SubscriptionDescription(topic.Path, value.SubscriptionName);
if (value.AttributeData != null) {
var attr = value.AttributeData;
if (attr.DefaultMessageTimeToLiveSet()) {
descriptionToCreate.DefaultMessageTimeToLive = new TimeSpan(0, 0, attr.DefaultMessageTimeToLive);
}
descriptionToCreate.EnableBatchedOperations = attr.EnableBatchedOperations;
descriptionToCreate.EnableDeadLetteringOnMessageExpiration = attr.EnableDeadLetteringOnMessageExpiration;
if (attr.LockDurationSet()) {
descriptionToCreate.LockDuration = new TimeSpan(0, 0, attr.LockDuration);
}
}
try {
logger.Info("CreateSubscription {0} ", value.SubscriptionNameDebug);
var filter = new SqlFilter(string.Format(AzureSenderReceiverBase.TYPE_HEADER_NAME + " = '{0}'", value.MessageType.FullName.Replace('.', '_')));
retryPolicy.ExecuteAction(() => {
desc = configurationFactory.NamespaceManager.CreateSubscription(descriptionToCreate, filter);
});
}
catch (MessagingEntityAlreadyExistsException) {
logger.Info("CreateSubscription {0} ", value.SubscriptionNameDebug);
// A item under the same name was already created by someone else, perhaps by another instance. Let's just use it.
retryPolicy.ExecuteAction(() => {
desc = configurationFactory.NamespaceManager.GetSubscription(topic.Path, value.SubscriptionName);
});
}
}
ISubscriptionClient subscriptionClient = null;
var rm = ReceiveMode.PeekLock;
if (value.AttributeData != null) {
rm = value.AttributeData.ReceiveMode;
}
retryPolicy.ExecuteAction(() => {
subscriptionClient = configurationFactory.MessageFactory.CreateSubscriptionClient(topic.Path, value.SubscriptionName, rm);
});
if (value.AttributeData != null && value.AttributeData.PrefetchCountSet()) {
subscriptionClient.PrefetchCount = value.AttributeData.PrefetchCount;
}
if (data == null) {
data = new AzureBusReceiverState() {
EndPointData = value,
Client = subscriptionClient
};
}
else {
//we need to clean up the deleted subscription
var oldClient = this.data.Client;
data.Client = subscriptionClient;
//now lets dispose the client.
ExtensionMethods.ExecuteAndReturn(() => {
if (oldClient != null) {
oldClient.Close();
}
});
}
}
void Configure(ServiceBusEnpointData value)
{
SubscriptionDescription desc = null;
bool createNew = false;
try {
logger.Info("CreateSubscription Try {0} ", value.SubscriptionNameDebug);
// First, let's see if a item with the specified name already exists.
verifyRetryPolicy.ExecuteAction(() => {
desc = configurationFactory.NamespaceManager.GetSubscription(topic.Path, value.SubscriptionName);
});
createNew = (desc == null);
}
catch (MessagingEntityNotFoundException) {
logger.Info("CreateSubscription Does Not Exist {0} ", value.SubscriptionNameDebug);
// Looks like the item does not exist. We should create a new one.
createNew = true;
}
// If a item with the specified name doesn't exist, it will be auto-created.
if (createNew)
{
var descriptionToCreate = new SubscriptionDescription(topic.Path, value.SubscriptionName);
if (value.AttributeData != null)
{
var attr = value.AttributeData;
if (attr.DefaultMessageTimeToLiveSet())
{
descriptionToCreate.DefaultMessageTimeToLive = new TimeSpan(0, 0, attr.DefaultMessageTimeToLive);
}
descriptionToCreate.EnableBatchedOperations = attr.EnableBatchedOperations;
descriptionToCreate.EnableDeadLetteringOnMessageExpiration = attr.EnableDeadLetteringOnMessageExpiration;
if (attr.LockDurationSet())
{
descriptionToCreate.LockDuration = new TimeSpan(0, 0, attr.LockDuration);
}
}
try {
logger.Info("CreateSubscription {0} ", value.SubscriptionNameDebug);
var filter = new SqlFilter(string.Format(AzureSenderReceiverBase.TYPE_HEADER_NAME + " = '{0}'", value.MessageType.FullName.Replace('.', '_')));
retryPolicy.ExecuteAction(() => {
desc = configurationFactory.NamespaceManager.CreateSubscription(descriptionToCreate, filter);
});
}
catch (MessagingEntityAlreadyExistsException) {
logger.Info("CreateSubscription {0} ", value.SubscriptionNameDebug);
// A item under the same name was already created by someone else, perhaps by another instance. Let's just use it.
retryPolicy.ExecuteAction(() => {
desc = configurationFactory.NamespaceManager.GetSubscription(topic.Path, value.SubscriptionName);
});
}
}
ISubscriptionClient subscriptionClient = null;
var rm = ReceiveMode.PeekLock;
if (value.AttributeData != null)
{
rm = value.AttributeData.ReceiveMode;
}
retryPolicy.ExecuteAction(() => {
subscriptionClient = configurationFactory.MessageFactory.CreateSubscriptionClient(topic.Path, value.SubscriptionName, rm);
});
if (value.AttributeData != null && value.AttributeData.PrefetchCountSet())
{
subscriptionClient.PrefetchCount = value.AttributeData.PrefetchCount;
}
if (data == null)
{
data = new AzureBusReceiverState()
{
EndPointData = value,
Client = subscriptionClient
};
}
else
{
//we need to clean up the deleted subscription
var oldClient = data.Client;
data.Client = subscriptionClient;
//now lets dispose the client.
ExtensionMethods.ExecuteAndReturn(() => {
if (oldClient != null)
{
if (!oldClient.IsClosed)
{
oldClient.Close();
}
}
});
}
}
