Event
This class allows for the periodic generation of events similar to that achieved by "Create" modules in simulation languages. This class works in conjunction with the EventGeneratorActionIfc which is used to listen and react to the events that are generated by this class.
Classes can supply an instance of an EventGeneratorActionIfc to provide the actions that take place when the event occurs. Alternatively, if no EventGeneratorActionIfc is supplied, by default the generator(JSLEvent event) method of this class will be called when the event occurs. Thus, subclasses can simply override this method to provide behavior for when the event occurs. If no EventGeneratorActionIfc is supplied and the method generate() method is not overridden, then the events will still occur; however, no meaningful actions will take place.
Of particular note is the use of initial parameters:
initial time of first event (default = Constant.ZERO) initial time between events (default = Constant.POSITIVE_INFINITY) initial maximum number of events (default = Long.MAX_VALUE) initial ending time (default = Double.POSITIVE_INFINITY)
These parameters control the initial state of the generator at the start of each replication. The generator is re-initialized to these values at the start of each replication. There are also parameters for each of these that can be changed during a replication. The effect of that change is only within the current replication.
Parameters
the parent model element
The action supplies the generation logic for reacting to the generated event.
A RandomIfc object that supplies the time until the first event.
A RandomIfc object that supplies the time between events. Must not be a RandomIfc that always returns 0.0, if the maximum number of generations is infinite (Long.MAX_VALUE)
A long that supplies the maximum number of events to generate. Each time an event is to be scheduled the maximum number of events is checked. If the maximum has been reached, then the generator is turned off. The default is Long.MAX_VALUE. This parameter cannot be Long.MAX_VALUE when the time until next always returns a value of 0.0
A double that supplies a time to stop generating events. When the generator is created, this variable is used to set the ending time of the generator. Each time an event is to be scheduled the ending time is checked. If the time of the next event is past this time, then the generator is turned off and the event won't be scheduled. The default is Double.POSITIVE_INFINITY.
the name of the generator
Constructors
Types
Properties
A flag to control whether the model element reacts to after experiment actions.
A flag to control whether the model element reacts to after replication actions.
A flag to control whether the model element reacts to before experiment actions.
A flag to control whether the model element reacts to before replication actions.
Indicates the current status of the model element for observers of ModelElement.Status
The time to stop generating for the current replication
The number of events currently generated during the replication
Determines the priority of the event generator's events The default is DEFAULT_PRIORITY - 1 A lower number implies higher priority.
Used to set the ending time when the generator is initialized at the start of each replication.
A flag to control whether the model element reacts to initialization actions
Controls the maximum number of events to be used to initialize each replication. The time between events cannot evaluate to a constant value of 0.0 if the maximum number of events is infinite (Long.MAX_VALUE). Uses the current value for initial time between events
Sets the time between events and the maximum number of events to be used to initialize each replication. The time between events cannot evaluate to a constant value of 0.0. The maximum number of events is kept at its current value, which by default is Long.Max_Value
Controls the random variable representing the time until the first event that is used at the beginning of each replication to generate the time until the first event. This change becomes effective at the beginning of the next replication to execute
true if an event is scheduled to occur for the generator
Whether the generator has been suspended
the left traversal count for pre-order traversal of the model element tree
The number of events to generate for the current replication
Returns a string representation of the model element and its child model elements. Useful for realizing the model element hierarchy.
A flag to control whether the model element participates in monte carlo actions.
Gets the number of model elements contained by this model elements.
Indicates the previous status of the model element for observers of ModelElement.Status This allows the transition to be noted by observers
A flag to control whether the model element reacts to end replication actions.
the right traversal count for pre-order traversal of the model element tree
The spatial model associated with this model element. By default, each model element uses its parent model element's spatial model unless changed via this property. This changes the spatial model for this model element and no others.
This flag controls whether the generator starts automatically when initialized at the beginning of a replication By default this option is true. If it is changed then it remains at the set value until changed again.
The time between events for the current replication
The time interval between TimedUpdate events. The default is zero, indicating no timed update
Specifies whether this model element participates in time update event specified by its parent
Specifies the havingPriority of this model element's timed update event.
Indicates whether the warm-up action occurred sometime during the simulation for this model element. False indicates that the warm-up action has not occurred
Specifies if this model element will be warmed up when the warmup action occurs for its parent. The warm-up flag indicates whether this model element will be warmed up when its parent warm up event/action occurs. The default value for all model elements is true. A value of true implies that the model element allows its parent's warm up event to call the warm-up action. A value of false implies that the model element does not allow its parent's warm up event to call the warm-up action. False does not necessarily mean that the model element will not be warmed up. It may, through the use of the lengthOfWarmUp property, have its own warm up event and action.
Specifies the priority of this model element's warm up event.
Functions
Cancels the timed update event for this model element.
Cancels the warm-up event for this model element.
Checks if this model element or any model element directly above this model element in the hierarchy of model elements all the way until the top Model participates in the warm-up action.
Can be used to supply logic to invoke when the generator's ending time is finite and the generator is turned off.
Find the first parent that has its own warm up event this guarantees that all elements below the found model element do not have their own warm-up event. A model element that has its own warm up event also opts out of the warm-up action. If the returned parent is the Model, then all are controlled by the model (unless they opt out). Elements can opt out and not have their own warm-up event. Thus, they have no warm up at all.
Can be used to supply logic to invoke when the generator's is supposed to generate
Fills up the supplied StringBuilder carrying a string representation of the model element and its child model elements Useful for realizing the model element hierarchy.
This method returns the planned time for the warm-up for this model element.
Fills a StringBuilder carrying the model element names in the order that they will be initialized
Checks if a warm-up event is scheduled for any model element directly above this model element in the hierarchy of model elements all the way until the top Model.
Checks if current status is the supplied status
Checks if a timed update event has been scheduled for this model element
Checks if a warm-up event has been scheduled for this model element
Returns the value of a 1 millisecond time interval in terms of the base time unit
Sets the after experiment option of all model elements (children) contained by this model element.
Sets the after replication flag of all model elements (children) contained by this model element.
Sets the before experiment option of all model elements (children) contained by this model element.
Sets the before replication flag of all model elements (children) contained by this model element.
Sets the initialization option of all model elements (children) contained by this model element.
Sets the time between events and the maximum number of events to be used to initialize each replication. These parameters are dependent. The time between events cannot evaluate to a constant value of 0.0 if the maximum number of events is infinite (Long.MAX_VALUE)
Sets the monte carlo option flag of all model elements (children) contained by this model element.
Sets the end replication option flag of all model elements (children) contained by this model element. Determines whether the replicationEnded() method will be called
Sets the time between events and the maximum number of events for the generator. These two parameters are dependent. The time between events cannot always evaluate to 0.0 if the maximum number of events is infinite (Long.MAX_VALUE). This method only changes these parameters for the current replication. The changes take effect when the next event is generated. If current number of events that have been generated is greater than or equal to the supplied maximum number of events, the generator will be turned off.
Sets the timed update option flag of all model elements (children) contained by this model element.
Sets the warm-up option flag of all model elements (children) contained by this model element.
This method turns the generator off, the next scheduled generation event will NOT occur, i.e. this method will also cancel a previously scheduled generation event if one exists. No future events will be scheduled after turning off the generator
If the generator was not started upon initialization at the beginning of a replication, then this method can be used to start the generator