CDF Run Control Implementation Elliott McCrory BD/Proton Source/Linac & CDF September 18, 2001.

CDF Run Control Implementation

Elliott McCrory

BD/Proton Source/Linac & CDF

September 18, 2001

18 September 2001Elliott McCrory2

Talk Overview

Overview Major OO Components

– Some class diagrams Key Elements:

– Classes– Interfaces– Listeners

Transition & TransitionStateMachine Scripting Performance


Overview of Run Control

RC and most of its components are implemented in Java

– OO?? Platform: FRH Linux

– Began with SGI Irix Swing-based GUI JDBC SmartSockets communications Heavily threaded

State Manager

SmartSockets Server(s)

Consumer

Error Handler

State Manager State Manager

Error Handler Error Handler

RunSet (Configuration) Database

OnlineData

VME n VME n+1 VME n+2 Level 2 Level 3VME n+3

Consumer


Major Components of RC

RunSet editor for client configuration Error handler for expert system control Data consumers VxWorks coordination General state machine logic

– Discussed here

Scripting interface for calibrations


GUI

Active State

Available Transition

Status of RC

Tevatron Status

Unavailable Transition

Top-Level Class View

GUI.class

rcBase.class

Shell.class

Jpython Scripting Classes

daqStateManager.class GenericCalibStateManager.class QIECalibStateManager.class

RunSet.class RunSetEditor.class PartitionSelector.class

RunTypeSelector.classConsumerEditor.class VxConfig.class

ErrorHandler.class

RC State Machine/Manager

FSM.class

Transition.class

daqStateManager.class GenericCalibStateManager.class

TransitionStateMachine.class

State.class

QIECalibStateManager.class

messenger.class

readoutConfig.class

ConfigMess.class

StateManager.class


Key Concepts

Modularism, abstraction, inheritance/polymorphism, data hiding, Mom & apple pie– Some “Design Patterns”

Isolation of GUI from FSM – Control flows “down”; GUI information flows “up”

through listeners and interfaces


Key Classes

FSM– Generalized finite state

machine StateManager

– CDF RC specific State Transition TransitionStateMachine DebugLevel

– Handles diagnostic printout

messenger– Singelton Design Pattern– Handles messaging to clients

ConfigMess– Abstract: all clients use this

class for their configuration messages

ConfigMessageFactory– Factory Design Pattern– Returns a ConfigMess

readoutConfig– Handles reception of replies

from clients


Key Interfaces

RCAction– Command Design Pattern– Perform an action when entering a state– public boolean execute()

RCCondition– public boolean isMet() to leave a state– public boolean isViolated() when an error is

encountered– public void reset()


Key Listeners

GUI Enabling– StateChangeListener– TransitionChangeListener– FsmStatusListener

Global information management– StateEventListener


Implementation of Transitions

Specifications say: Sequence RCAction’s– e.g., you must configure all clients (“ColdStart”)

before configuring Level 3

Implemented as a FSM TransitionStateMachine extends Transition

and “Has A” FSM


Transition Sub State Machine

Sx = sub state ESx = Error State Ax = Action upon

entering State Cx = Condition for

leaving State


Scripting

Used for calibrations– Desire to change one or two parameters in a client crate’s

configuration message over ~10 calibration iterations

Initially implemented in Jpython– Basic JPython class extends Java class Shell– Generally requires “isinstance()” JPython operator to find

configuration message for crate being calibrated

Being abandoned for all-Java solution– Benefits of scripting (easy changes) not strong enough to

outweigh drawbacks (new language).


Performance

Startup of rc.GUI: about 1 minute Java VM: 10’s of MB Run-time performance: no issue Knowledgeable and/or relevant programmers:

3 to 10


Summary

Java implementation of CDF Run Control– Swing GUI– Some OO techniques

Calibration scripts in JPython, moving to Java calibration programs

CDF Run Control Implementation Elliott McCrory BD/Proton Source/Linac & CDF September 18, 2001.

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