Package com.espertech.esper.epl.variable

Variable service and variable collections

See:
Description

Interface Summary

VariableChangeCallback	A callback interface for indicating a change in variable value.
VariableService	Variables service for reading and writing variables, and for setting a version number for the current thread to consider variables for.
VariableStateFactory
VariableStateHandler	Interface for a plug-in to VariableService to handle variable persistent state.

Class Summary

CreateVariableView	View for handling create-variable syntax.
CurrentValue<T>	A holder for versioned values that holds a current version-value and a prior version-value pair.
OnSetVariableView	A view that handles the setting of variables upon receipt of a triggering event.
OnSetVariableViewFactory	A factory for a view that handles the setting of variables upon receipt of a triggering event.
VariableMetaData
VariableReader	Reads and writes variable values.
VariableReadWritePackage	A convenience class for dealing with reading and updating multiple variable values.
VariableServiceImpl	Variables service for reading and writing variables, and for setting a version number for the current thread to consider variables for.
VariableServiceUtil
VariableStateFactoryConst
VariableVersionThreadEntry	Thread-specific state in regards to variable versions.
VariableVersionThreadLocal	A wrapper for a thread-local to hold the current version for variables visible for a thread, as well as uncommitted values of variables for a thread.
VersionedValue<T>	Holds a version of a value and a timestamp when that version is taken.
VersionedValueList<T>	A self-cleaning list of versioned-values.

Exception Summary

VariableDeclarationException	Exception indicating a problem in a variable declaration.
VariableExistsException	Exception indicating a a variable already exists.
VariableNotFoundException	Exception indicating a variable does not exists.
VariableTypeException	Exception indicating a variable type error.

Package com.espertech.esper.epl.variable Description

Variable service and variable collections