Package jline.lang.layered

Class Entry

  • All Implemented Interfaces:
    java.io.Serializable , jline.lang.Copyable 
    
public class Entry
extends LayeredNetworkElement

    An Entry represents a service interface exposed by a Task in a layered queueing network.

    Entries define the points where external requests can enter a task and receive service. They act as the public interface of a task, similar to methods or endpoints in software systems. Each entry can receive requests from other tasks or from external arrival sources.

    Key characteristics:

    • Service interface: Defines what service the task provides to callers
    • Arrival distribution: For open systems, the arrival process of external requests
    • Activity binding: Can be bound to specific activities that implement the service
    • Reply activity: Designates which activity sends the response back to the caller

    Entries are essential for modeling service-oriented architectures, web services, database systems, and any system where tasks provide distinct services to clients.

    • Method Detail

      • getArrival

         Distribution getArrival()

        Gets the open arrival distribution for this entry.

        Returns:

        The arrival distribution, or null if not set

      • setArrival

         Entry setArrival(Distribution arrival)

        Sets the open arrival process for this entry.

        Parameters:
        arrival - The arrival distribution (e.g.
        Returns:

        this Entry for method chaining

      • forward

         Entry forward(Entry dest, double prob)

        Add a forwarding call to another entry with a specified probability. Forwarding allows this entry to redirect the reply to another entry instead of replying directly to the original caller.

        Parameters:
        dest - The destination entry to forward to
        prob - The probability of forwarding (0.0 to 1.
        Returns:

        This entry for method chaining

      • forward

         Entry forward(String destName, double prob)

        Add a forwarding call to another entry by name with a specified probability.

        Parameters:
        destName - The name of the destination entry
        prob - The probability of forwarding (0.0 to 1.
        Returns:

        This entry for method chaining

      • forward

         Entry forward(Entry dest)

        Add a forwarding call to another entry with probability 1.0.

        Parameters:
        dest - The destination entry to forward to
        Returns:

        This entry for method chaining

      • forward

         Entry forward(String destName)

        Add a forwarding call to another entry by name with probability 1.0.

        Parameters:
        destName - The name of the destination entry
        Returns:

        This entry for method chaining

      • getForwardingProbs

         Matrix getForwardingProbs()

        Get the matrix of forwarding probabilities.

        Returns:

        Matrix of forwarding probabilities

      • validateForwardingProbability

         void validateForwardingProbability(double prob)

        Validate that a forwarding probability is valid and that the sum of all forwarding probabilities does not exceed 1.0.

        Parameters:
        prob - The probability to validate