public MpscLinkedArrayQueue(int capacity)
{
var q = new QueueSection(capacity);
Volatile.Write(ref consumerQueue, q);
Volatile.Write(ref producerQueue, q);
}
public bool Poll(out T item)
{
var q = consumerQueue;
var a = q.entries;
var m = a.Length - 1;
var ci = consumerIndex;
var offset = (int)(ci) & m;
int s = Volatile.Read(ref a[offset].state);
if (s == 0)
{
item = default(T);
return(false);
}
if (s == 2)
{
var q2 = q.next;
a = q2.entries;
q.next = null;
consumerQueue = q2;
}
item = a[offset].value;
Volatile.Write(ref a[offset].state, 0);
Volatile.Write(ref consumerIndex, ci + 1);
return(true);
}
public bool Offer(T item)
{
var q = producerQueue;
var a = q.entries;
var m = a.Length - 1;
var pi = producerIndex;
var offsetNext = (int)(pi + 1) & m;
var offset = (int)(pi) & m;
if (Volatile.Read(ref a[offsetNext].state) != 0)
{
var q2 = new QueueSection(m + 1);
var b = q2.entries;
b[offset].value = item;
b[offset].state = 1;
q.next = q2;
producerQueue = q2;
Volatile.Write(ref a[offset].state, 2);
Volatile.Write(ref producerIndex, pi + 1);
return(true);
}
a[offset].value = item;
Volatile.Write(ref a[offset].state, 1);
Volatile.Write(ref producerIndex, pi + 1);
return(true);
}
public SpscLinkedArrayQueue(int bufferSize)
{
int c = QueueHelper.Pow2(Math.Max(2, bufferSize));
var q = new QueueSection(c);
producerQueue = q;
Volatile.Write(ref consumerQueue, q);
}
public static List <IRepository> GetAllRepositories(QueueSection queueSection)
{
var repositorys = new List <IRepository>();
foreach (var queue in queueSection.Queue)
{
repositorys.Add(GetRepository(queue.ConnectionString, queue.QueueName));
}
return(repositorys);
}
public static List<IRepository> GetAllRepositories(QueueSection queueSection)
{
var repositorys = new List<IRepository>();
foreach (var queue in queueSection.Queue)
{
repositorys.Add(GetRepository(queue.ConnectionString, queue.QueueName));
}
return repositorys;
}
public bool Offer(T item)
{
var q = Volatile.Read(ref producerQueue);
var a = q.array;
var n = a.Length;
for (;;)
{
int offset = Volatile.Read(ref q.producerIndex);
if (offset < n)
{
offset = Interlocked.Increment(ref q.producerIndex) - 1;
}
if (offset >= n)
{
var next = Volatile.Read(ref q.next);
if (next != null)
{
Interlocked.CompareExchange(ref producerQueue, next, q);
q = next;
a = next.array;
continue;
}
next = new QueueSection(n);
a = next.array;
a[0].item = item;
a[0].state = 1;
next.producerIndex = 1;
if (Interlocked.CompareExchange(ref q.next, next, null) != null)
{
next = q.next;
Interlocked.CompareExchange(ref producerQueue, next, q);
q = next;
a = q.array;
continue;
}
Interlocked.CompareExchange(ref producerQueue, next, q);
return(true);
}
a[offset].item = item;
Volatile.Write(ref a[offset].state, 1);
return(true);
}
}
/// <summary>
/// Creates or gets a queue defined by configuration
/// This method requires a queue to be configured in the application config file with the name provided in queueName
/// </summary>
/// <param name="queueName">The name of the queue as defined in the configuration file</param>
/// <returns>The IQueue singleton object</returns>
/// <example>
/// Source Code;
/// <code language="cs">
/// IQueue defaultQueue = QueueFactory.CreateQueue("myqueue");
/// </code>
///
/// Configuration:
/// <code>
/// <![CDATA[
/// <configuration>
/// <configSections>
/// <section name="queueit.security" type="QueueIT.Security.Configuration.SettingsSection, QueueIT.Security"/>
/// </configSections>
/// <queueit.security
/// secretKey="a774b1e2-8da7-4d51-b1a9-7647147bb13bace77210-a488-4b6f-afc9-8ba94551a7d7">
/// <queues>
/// <queue name="myqueue" customerId="ticketania" eventId="advanced"/>
/// </queues>
/// </queueit.security>
/// </configuration>
/// ]]>
/// </code>
/// </example>
public static IQueue CreateQueue(string queueName)
{
if (string.IsNullOrEmpty(queueName))
{
throw new ArgumentException("Queue Name cannot be null or empty", "queueName");
}
if (_settings == null)
{
throw new ConfigurationErrorsException(string.Format(
"Configuration section '{0}' is missing from configuration file",
SettingsSection.ConfigurationSectionName));
}
QueueSection queueConfiguration = _settings.Queues == null
? null
:_settings.Queues.GetGeneric().FirstOrDefault(queueConfig => queueConfig.Name == queueName);
if (queueConfiguration == null)
{
throw new ConfigurationErrorsException(string.Format(
"Configuration for Queue Name '{0}' in section '{1}' is missing from configuration file",
queueName,
SettingsSection.ConfigurationSectionName));
}
Queue queue = InstantiateQueue(
queueConfiguration.CustomerId,
queueConfiguration.EventId,
string.IsNullOrEmpty(queueConfiguration.DomainAlias) ? null : queueConfiguration.DomainAlias,
string.IsNullOrEmpty(queueConfiguration.LandingPage) ? null : queueConfiguration.LandingPage,
queueConfiguration.UseSsl,
queueConfiguration.IncludeTargetUrl,
string.IsNullOrEmpty(queueConfiguration.Language) ? null : new CultureInfo(queueConfiguration.Language),
string.IsNullOrEmpty(queueConfiguration.LayoutName) ? null : queueConfiguration.LayoutName);
return(queue);
}
public bool Poll(out T item)
{
var q = consumerQueue;
var a = q.array;
var n = a.Length;
var ci = consumerIndex;
for (;;)
{
if (ci == n)
{
var q2 = Volatile.Read(ref q.next);
if (q2 == null)
{
item = default(T);
return(false);
}
//q.next = null;
consumerQueue = q2;
a = q2.array;
ci = 0;
}
if (Volatile.Read(ref a[ci].state) != 0)
{
item = a[ci].item;
a[ci].item = default(T);
consumerIndex = ci + 1;
return(true);
}
if (ci == Math.Min(n, Volatile.Read(ref q.producerIndex)) && Volatile.Read(ref q.next) == null)
{
item = default(T);
return(false);
}
}
}
public void Configure(QueueSenderConfig config)
{
var configSectionName = config.sectionName;
_queueConfig = Helper.QueueConfig(configSectionName);
}
