Package jline.lang

Class ClosedSignal

java.lang.Object
jline.lang.Element
jline.lang.NetworkElement
jline.lang.JobClass
jline.lang.ClosedClass
jline.lang.ClosedSignal
All Implemented Interfaces:
Serializable, Copyable
public class ClosedSignal extends ClosedClass implements Serializable
A closed signal class for modeling signals in closed queueing networks.

ClosedSignal is a specialized ClosedClass for signals that need to circulate in closed networks. Unlike regular Signal (which extends OpenClass), ClosedSignal can be used in networks without Source/Sink nodes.

ClosedSignal has zero population - signals are created dynamically through class switching from the target job class.

Signal types:

  • NEGATIVE: Removes a job from the destination queue
  • REPLY: Unblocks servers waiting for a reply (LQN synchronous call semantics)
See Also:

  • Constructor Details

    • ClosedSignal

      public ClosedSignal(Network model, String name, SignalType signalType, Station refstat, int priority, DiscreteDistribution removalDistribution, RemovalPolicy removalPolicy)
      Creates a new closed signal class with full configuration for batch removal.
      Parameters:
      model - the network model to add this class to
      name - the name for this signal class
      signalType - the type of signal (NEGATIVE or REPLY)
      refstat - the reference station (should match target job class)
      priority - the priority level for signals in this class
      removalDistribution - the distribution for number of jobs to remove (null for exactly 1)
      removalPolicy - the policy for selecting which jobs to remove

    • ClosedSignal

      public ClosedSignal(Network model, String name, SignalType signalType, Station refstat, int priority)
      Creates a new closed signal class with the specified type, reference station, and priority. Uses default removal behavior (remove exactly 1 job, random selection).
      Parameters:
      model - the network model to add this class to
      name - the name for this signal class
      signalType - the type of signal (NEGATIVE or REPLY)
      refstat - the reference station (should match target job class)
      priority - the priority level for signals in this class

    • ClosedSignal

      public ClosedSignal(Network model, String name, SignalType signalType, Station refstat)
      Creates a new closed signal class with the specified type, reference station, and default priority (0). Uses default removal behavior (remove exactly 1 job, random selection).
      Parameters:
      model - the network model to add this class to
      name - the name for this signal class
      signalType - the type of signal (NEGATIVE or REPLY)
      refstat - the reference station (should match target job class)

    • ClosedSignal

      public ClosedSignal(Network model, String name, Station refstat)
      Creates a new negative closed signal class with default priority (0). Uses default removal behavior (remove exactly 1 job, random selection).
      Parameters:
      model - the network model to add this class to
      name - the name for this signal class
      refstat - the reference station

  • Method Details

    • getSignalType

      public SignalType getSignalType()
      Gets the signal type for this signal class.
      Returns:
      the signal type

    • setSignalType

      public void setSignalType(SignalType signalType)
      Sets the signal type for this signal class.
      Parameters:
      signalType - the new signal type

    • forJobClass

      public ClosedSignal forJobClass(JobClass jobClass)
      Associates this signal with a job class.

      For REPLY signals, this specifies which job class's servers will be unblocked when this signal arrives.

      Parameters:
      jobClass - the JobClass to associate with this signal
      Returns:
      this ClosedSignal instance (for method chaining)

    • getTargetJobClass

      public JobClass getTargetJobClass()
      Gets the associated job class.
      Returns:
      the JobClass associated with this signal, or null if none

    • getTargetJobClassIndex

      public int getTargetJobClassIndex()
      Gets the index of the associated job class.
      Returns:
      the index of the associated JobClass, or -1 if none

    • getRemovalDistribution

      public DiscreteDistribution getRemovalDistribution()
      Gets the removal distribution for this negative signal.
      Returns:
      the removal distribution, or null for single removal

    • setRemovalDistribution

      public void setRemovalDistribution(DiscreteDistribution removalDistribution)
      Sets the removal distribution for this negative signal.
      Parameters:
      removalDistribution - the distribution for number of removals

    • getRemovalPolicy

      public RemovalPolicy getRemovalPolicy()
      Gets the removal policy for this negative signal.
      Returns:
      the removal policy (RANDOM, FCFS, or LCFS)

    • setRemovalPolicy

      public void setRemovalPolicy(RemovalPolicy removalPolicy)
      Sets the removal policy for this negative signal.
      Parameters:
      removalPolicy - the policy for selecting customers to remove

    • isCatastrophe

      public boolean isCatastrophe()
      Returns whether this signal is a catastrophe (removes all jobs).
      Returns:
      true if signalType is CATASTROPHE

    • printSummary

      public void printSummary()
      Prints a summary of this closed signal class configuration.
      Overrides:
      printSummary in class ClosedClass