org.yamcs.algorithms

Class ScriptAlgorithmExecutor

java.lang.Object

org.yamcs.algorithms.AbstractAlgorithmExecutor

org.yamcs.algorithms.ScriptAlgorithmExecutor

All Implemented Interfaces:

AlgorithmExecutor

public class ScriptAlgorithmExecutor
extends AbstractAlgorithmExecutor

Represents the execution context of one algorithm. An AlgorithmEngine is reused upon each update of one or more of its InputParameters.

This class will create and compile on-the-fly ValueBinding implementations for every unique combination of raw and eng types. The reason for this is to get the mapping correct from Java to JavaScript. Rhino (the default JavaScript engine for JDK ≤ 7) will map java Float, Integer, etc towards javascript Object, instead of Number. As a result, in javascript, using the plus operator on two supposed numbers would do a string concatenation instead of an addition.

Rather than changing the Rhino configuration (which would require drastic tampering of the maven-compiler-plugin in order to lift Sun's Access Restrictions on these internal classes), we generate classes with primitive raw/eng values when needed.

Field Summary

Fields inherited from class org.yamcs.algorithms.AbstractAlgorithmExecutor

algorithmDef, execCtx, execListeners, mandatoryToRun, requiredParameters

Constructor Summary

Constructors

Constructor and Description
ScriptAlgorithmExecutor(CustomAlgorithm algorithmDef, Invocable invocable, String functionName, AlgorithmExecutionContext execCtx, EventProducer eventProducer)

Method Summary

Modifier and Type	Method and Description
List<ParameterValue>	runAlgorithm(long acqTime, long genTime) Runs the associated algorithm with the latest InputParameters
String	toString()
protected void	updateInput(InputParameter inputParameter, ParameterValue newValue)

Methods inherited from class org.yamcs.algorithms.AbstractAlgorithmExecutor

addExecListener, getAlgorithm, getExecutionContext, getLookbackSize, getRequiredParameters, propagateToListeners, updateParameters

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ScriptAlgorithmExecutor

public ScriptAlgorithmExecutor(CustomAlgorithm algorithmDef,
                               Invocable invocable,
                               String functionName,
                               AlgorithmExecutionContext execCtx,
                               EventProducer eventProducer)

Method Detail

updateInput

protected void updateInput(InputParameter inputParameter,
                           ParameterValue newValue)

Specified by:

updateInput in class AbstractAlgorithmExecutor

runAlgorithm

public List<ParameterValue> runAlgorithm(long acqTime,
                                         long genTime)

Description copied from interface: AlgorithmExecutor

Runs the associated algorithm with the latest InputParameters

Returns:

the outputted parameters, if any

toString

public String toString()

Overrides:

toString in class Object