stella

Class MasterLauncher

java.lang.Object

util.PropertyContainer

util.PropertyResources

util.rmi.RmiPropertyContainer

util.rmi.AbstractRmiCaster

stella.CastingContainer

stella.AbstractCommandLauncher

stella.MasterLauncher

All Implemented Interfaces:

Cloneable, Remote, Caster, CommandLaunching, ErrorCaster, ReplyDeliverer, RmiCommandCaster, RmiErrorCaster, ExitCleaning, Initializable, PropertySupplying, ResourceSupplying, RmiCaster, RmiPropertyBearing

public class MasterLauncher
extends AbstractCommandLauncher
implements ErrorCaster, RmiErrorCaster, RmiCommandCaster, Initializable, ExitCleaning

The CommandLaunching instance for master commands. Master commands are internally handled commands that may appear in a sequence definition. To allow the sequencer to cast this command as remote command to remote CommandLaunching instances, this class acts as the 'missing link'. Note that this class is highly specific in the sense that internal commands will in most cases not be recognizable on different systems.

This class also acts as a ReplyDeliverer though it is not an acknowledge or done caster. Reply events are only generated if they match To allow the SCS to cast errors similar to other CommandLaunching instances, this class extends the CastingContainer class. Additionally, RmiCommandCaster may be enabled. The rmi-casting capabilities are intended for remote logging only.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	MasterLauncher.MasterHelper The master launcher helper thread.

Nested classes/interfaces inherited from class util.PropertyResources

PropertyResources.Load, PropertyResources.URLResource

Field Summary

Fields

Modifier and Type	Field and Description
private MasterMind	chef The master mind.
private List	command The list of rmi-command listeners.
private static double	DEFACCELERATE The default acceleration factor.
private static boolean	DEFBIND The default error-binding behaviour.
private static String	DEFNAME The default name of the master launcher (SCS).
private static long	DEFSHUTDOWNDELAY The default shutdown delay time, 5 sec.
private static String	DEFSTARTGRAB The default start-grab script.
private static String	DEFSTOPGRAB The default start-grab script.
private ReplySubscriber	forward The registered reply subscriber.
static String	KEY_ACCELERATE The key matching possible acceleration of the internal counter.
static String	KEY_BIND The key matching the default error casting binding.
static String	KEY_BINDNAME The key linked to the server name.
static String	KEY_NAME The key linked to the client's name.
static String	KEY_SHUTDOWNDELAY The time delay from receiving quit-command until orderly shutdown.
static String	KEY_STARTGRAB The key to the command line for starting the grabbing.
static String	KEY_STOPGRAB The key to the command line for starting the grabbing.
private List	pattern The replies the reply subscriber is interested in.
private AlarmWatch	stopwatch An alarm to act as an interruptable stop-watch.

Fields inherited from class util.rmi.AbstractRmiCaster

ALTERNATEHOST, ALTERNATEPORT, KEY_EXPORTPORT, KEY_REGISTRYHOST, KEY_REGISTRYPORT

Fields inherited from class util.PropertyResources

KEY_NOINITONCREATE, POSTFIX_ALPHABET, POSTFIX_BYTES, POSTFIX_DIR, POSTFIX_EXT, POSTFIX_FILE, POSTFIX_LIST, POSTFIX_MODTIME, POSTFIX_URL

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface stella.rmi.RmiCommandCaster

NAMING_EXTENSION

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Fields inherited from interface util.ResourceSupplying

KEY_URLRESOURCES, KEY_URLUSECONFIG, KEY_URLUSECURRENT, KEY_URLUSEHOME

Constructor Summary

Constructors

Constructor and Description
MasterLauncher(Map prop) Constructs a new master launcher with the specified properties.

Method Summary

Modifier and Type	Method and Description
void	addRmiCommandListener(RmiCommandListener ear) Registers a command listener to the master launcher.
void	announceInterest(ReplyEvent re) Adds a new reply event pattern to the pattern list.
void	castCommand(CommandEvent ce) Cast the command to the SCS.
void	cont() For times the guiding was lost.
void	exit() Unbind thyself from the rwgistry.
String	getBindName() Returns the name of the master launcher used for readability improvement.
String	getClientName() Returns the name of the master launcher used for readability improvement.
CommandEvent	getExitCommand() Default implementation of exit command is null.
CommandEvent	getShutdownCommand() Returns the shutdown command.
void	halt() For times the guiding was lost.
boolean	handles(CommandEvent ce) The master launcher handles ScsCommands.
void	init() Initializes the master launcher.
boolean	isReady() This is an internal command launcher.
protected void	processCommand(CommandEvent ce) The method to handle internal (master) commands.
void	recastCommand() Empty method.
protected void	registerMasterMind(MasterMind sub) Registers the reply subscriber.
void	registerReplySubscriber(ReplySubscriber sub) Registers the reply subscriber.
void	removeRmiCommandListener(RmiCommandListener ear) Deregisters a command listener to the master launcher.

Methods inherited from class stella.AbstractCommandLauncher

createCommandLauncher

Methods inherited from class stella.CastingContainer

addErrorListener, addRmiErrorListener, isValid, notifyErrorListener, removeErrorListener, removeRmiErrorListener, sendError, sendError, sendError, sendStatus, sendStatus, sendStatus

Methods inherited from class util.rmi.AbstractRmiCaster

bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, casterExit, casterExit, getBindName, unbindFromRegistry, unbindFromRegistry

Methods inherited from class util.rmi.RmiPropertyContainer

containsRemoteProperty, getRemoteProperties, getRemoteProperty, setRemoteProperty

Methods inherited from class util.PropertyResources

clone, createFrom, createFrom, createFrom, createInstance, getApplet, getAsResources, getLocate, getPropertiesToKey, getPropertiesToKey, getResource, getResourceAsStream, getResourceFromKey, getResources, hasLocalURLs, initProperties, keyCreate, keyCreate, reload, setApplet

Methods inherited from class util.PropertyContainer

augment, augment, augment, augment, augment, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, isNew, parseObject, parseObject, reload, removeProperty, requires, rescanned, setObject, setProperties, setProperty, stringProperties, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface stella.ErrorCaster

addErrorListener, removeErrorListener

Methods inherited from interface stella.rmi.RmiErrorCaster

addRmiErrorListener, removeRmiErrorListener

Methods inherited from interface util.rmi.RmiCaster

bindToRegistry, isValid, unbindFromRegistry

Methods inherited from interface util.PropertySupplying

defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, parseObject, removeProperty, setObject, setProperty, stringProperties

Field Detail

KEY_NAME

public static final String KEY_NAME

The key linked to the client's name.

See Also:

Constant Field Values

KEY_BINDNAME

public static final String KEY_BINDNAME

The key linked to the server name.

See Also:

Constant Field Values

KEY_BIND

public static final String KEY_BIND

The key matching the default error casting binding.

See Also:

Constant Field Values

KEY_ACCELERATE

public static final String KEY_ACCELERATE

The key matching possible acceleration of the internal counter.

See Also:

Constant Field Values

KEY_STARTGRAB

public static final String KEY_STARTGRAB

The key to the command line for starting the grabbing.

See Also:

Constant Field Values

KEY_STOPGRAB

public static final String KEY_STOPGRAB

The key to the command line for starting the grabbing.

See Also:

Constant Field Values

KEY_SHUTDOWNDELAY

public static final String KEY_SHUTDOWNDELAY

The time delay from receiving quit-command until orderly shutdown.

See Also:

Constant Field Values

DEFNAME

private static final String DEFNAME

The default name of the master launcher (SCS).

See Also:

Constant Field Values

DEFBIND

private static final boolean DEFBIND

The default error-binding behaviour.

See Also:

Constant Field Values

DEFACCELERATE

private static final double DEFACCELERATE

The default acceleration factor.

See Also:

Constant Field Values

DEFSTARTGRAB

private static final String DEFSTARTGRAB

The default start-grab script.

See Also:

Constant Field Values

DEFSTOPGRAB

private static final String DEFSTOPGRAB

The default start-grab script.

See Also:

Constant Field Values

DEFSHUTDOWNDELAY

private static final long DEFSHUTDOWNDELAY

The default shutdown delay time, 5 sec.

See Also:

Constant Field Values

forward

private ReplySubscriber forward

The registered reply subscriber.

pattern

private final List pattern

The replies the reply subscriber is interested in.

stopwatch

private final AlarmWatch stopwatch

An alarm to act as an interruptable stop-watch.

command

private final List command

The list of rmi-command listeners.

chef

private MasterMind chef

The master mind.

Constructor Detail

MasterLauncher

public MasterLauncher(Map prop)
               throws RemoteException

Constructs a new master launcher with the specified properties. If the name is not set the default name is used, DEFNAME. Binding the rmi error-caster to the registry is defined with the KEY_BIND property. The default setting is DEFBIND. The binding name used is defined with KEY_BINDNAME, defaults to DEFNAME.

Throws:

RemoteException

Method Detail

init

public void init()

Initializes the master launcher. This includes binding of the rmi error casting capabilites to a running registry.

Specified by:

init in interface Initializable

Overrides:

init in class CastingContainer

exit

public void exit()

Unbind thyself from the rwgistry.

Specified by:

exit in interface ExitCleaning

Overrides:

exit in class CastingContainer

getExitCommand

public CommandEvent getExitCommand()

Default implementation of exit command is null.

Specified by:

getExitCommand in interface CommandLaunching

registerReplySubscriber

public void registerReplySubscriber(ReplySubscriber sub)

Registers the reply subscriber. Call this method with a null argument to disable reply forwarding.

Specified by:

registerReplySubscriber in interface ReplyDeliverer

Parameters:

sub - The reply subscriber interested in received replies.

registerMasterMind

protected void registerMasterMind(MasterMind sub)

Registers the reply subscriber. Call this method with a null argument to disable reply forwarding.

Parameters:

sub - The reply subscriber interested in received replies.

announceInterest

public void announceInterest(ReplyEvent re)

Adds a new reply event pattern to the pattern list. This method should be called by the reply subscriber prior to sending the command that will produce the appropriate reply to the caster (castCommand(stella.CommandEvent)). Note that handling of multiple acknowledge commands is not possible in a master launcher.

Specified by:

announceInterest in interface ReplyDeliverer

getClientName

public String getClientName()

Returns the name of the master launcher used for readability improvement.

Specified by:

getClientName in interface CommandLaunching

getBindName

public String getBindName()

Returns the name of the master launcher used for readability improvement.

Overrides:

getBindName in class AbstractRmiCaster

getShutdownCommand

public CommandEvent getShutdownCommand()

Returns the shutdown command. This is the artificial ParkMaster command.

Specified by:

getShutdownCommand in interface CommandLaunching

isReady

public boolean isReady()

This is an internal command launcher. It is always ready.

Specified by:

isReady in interface CommandLaunching

handles

public boolean handles(CommandEvent ce)

The master launcher handles ScsCommands.

Specified by:

handles in interface CommandLaunching

castCommand

public void castCommand(CommandEvent ce)

Cast the command to the SCS. To allow fast return this method spawns its own helper thread. This thread calls back on the master launcher's protected processCommand(stella.CommandEvent) method. Additionally, it checks for registered acknloedge events prior to the call to this method and for registered done events after this method returns.

Specified by:

castCommand in interface CommandLaunching

addRmiCommandListener

public void addRmiCommandListener(RmiCommandListener ear)
                           throws RemoteException

Registers a command listener to the master launcher. Intended for logging only.

Specified by:

addRmiCommandListener in interface RmiCommandCaster

Throws:

RemoteException

removeRmiCommandListener

public void removeRmiCommandListener(RmiCommandListener ear)
                              throws RemoteException

Deregisters a command listener to the master launcher. Intended for logging only.

Specified by:

removeRmiCommandListener in interface RmiCommandCaster

Throws:

RemoteException

recastCommand

public void recastCommand()

Empty method. The master launcher is an internal command processor, therefore relaunching of commands is not necessarry.

Specified by:

recastCommand in interface CommandLaunching

halt

public void halt()

For times the guiding was lost. This method halts the internal watch until the cont() method is called.

cont

public void cont()

For times the guiding was lost. This method re-enables the internal watch after the halt() method has been called.

processCommand

protected void processCommand(CommandEvent ce)

The method to handle internal (master) commands. This method is also responsible for generating error events occuring within the command processing (this behaviour is different to the ReceiverTorso class).