public NamedWindowConsumerLatchWait(
NamedWindowDeltaData deltaData,
IDictionary<EPStatementAgentInstanceHandle, IList<NamedWindowConsumerView>> dispatchTo,
NamedWindowConsumerLatchFactory factory,
NamedWindowConsumerLatchWait earlier)
: base(deltaData, dispatchTo)
{
this.factory = factory;
EarlierLocal = earlier;
}
/// <summary>
/// Returns a new latch.
/// <para />
/// Need not be synchronized as there is one per statement and execution is during statement lock.
/// </summary>
/// <param name="delta">the delta</param>
/// <param name="consumers">consumers</param>
/// <returns>latch</returns>
public NamedWindowConsumerLatch NewLatch(
NamedWindowDeltaData delta,
IDictionary<EPStatementAgentInstanceHandle, IList<NamedWindowConsumerView>> consumers)
{
if (useSpin) {
var nextLatch = new NamedWindowConsumerLatchSpin(delta, consumers, this, currentLatchSpin);
currentLatchSpin = nextLatch;
return nextLatch;
}
if (enabled) {
var nextLatch = new NamedWindowConsumerLatchWait(delta, consumers, this, currentLatchWait);
currentLatchWait.Later = nextLatch;
currentLatchWait = nextLatch;
return nextLatch;
}
return new NamedWindowConsumerLatchNone(delta, consumers);
}
/// <summary>
/// Ctor.
/// </summary>
/// <param name="name">the factory name</param>
/// <param name="msecWait">the number of milliseconds latches will await maximally</param>
/// <param name="locking">the blocking strategy to employ</param>
/// <param name="timeSourceService">time source provider</param>
/// <param name="initializeNow">for initializing</param>
/// <param name="enabled">for active indicator</param>
public NamedWindowConsumerLatchFactory(
string name,
bool enabled,
int msecWait,
Locking locking,
TimeSourceService timeSourceService,
bool initializeNow)
{
this.name = name;
this.enabled = enabled;
this.msecWait = msecWait;
this.timeSourceService = timeSourceService;
useSpin = enabled && locking == Locking.SPIN;
// construct a completed latch as an initial root latch
if (initializeNow && useSpin) {
currentLatchSpin = new NamedWindowConsumerLatchSpin(this);
}
else if (initializeNow && enabled) {
currentLatchWait = new NamedWindowConsumerLatchWait(this);
}
}
