java.mtsb
Class Component

java.lang.Object
  |
  +--java.mtsb.Component

public class Component

extends java.lang.Object

The component class is characterised by the message the component can receive and the events the component can propagate. The propagation of events is implemented by the event() method of this class. This method is invoked by the descendant classes after the reception of a message that is considered relevant to the environment. In this way, the throwing of events is transparent to the programmer and there is no need to redefine it. Events are delegated to a binding class (USP class, described at LocalUSP.doc) which implements the dynamic linking of components; therefore components propagate events to unknown connectors.

The component class is the root of the component hierarchy; consequently MTS components will be descendants of it.

Field Summary

int	ident
java.lang.String	name
java.lang.String	type
java.net.URL	url
LocalUSP	usp

Constructor Summary

Component(java.lang.String instancename)

Component(java.lang.String instancename, LocalUSP usp)
Constructor of the class.

Method Summary

void	event(java.mtsb.ClassEvent e) This method propagates an event to a Connector throw the USP.
void	event(java.lang.String type, java.lang.Object[] args)
java.mtsb.CID	getCID()
java.lang.String	getServiceParameter(java.lang.String name) This method retrieves the value of a parameter of a running service.
boolean	hasType(java.lang.String type) This method returns true if the component is of type of the argument
void	setInstanceName(java.lang.String name)
void	setLocalUSP(LocalUSP usp)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

usp

public LocalUSP usp

type

public java.lang.String type

name

public java.lang.String name

url

public java.net.URL url

ident

public int ident

Constructor Detail

Component

public Component(java.lang.String instancename,
                 LocalUSP usp)
          throws java.lang.Exception

Constructor of the class. Creates a component and inits the components ident and the link to the middleware platform. Each component has a unique global address defined by its CID class. This address will be used by connectors for sending response messages.

Component

public Component(java.lang.String instancename)
          throws java.lang.Exception

Method Detail

setLocalUSP

public void setLocalUSP(LocalUSP usp)
                 throws java.lang.Exception

setInstanceName

public void setInstanceName(java.lang.String name)

getCID

public java.mtsb.CID getCID()

event

public void event(java.mtsb.ClassEvent e)

This method propagates an event to a Connector throw the USP. The argument(s) describe(s) the event by an object ClassEvent or by the type of the event and its arguments

event

public void event(java.lang.String type,
                  java.lang.Object[] args)

hasType

public boolean hasType(java.lang.String type)

This method returns true if the component is of type of the argument

getServiceParameter

public java.lang.String getServiceParameter(java.lang.String name)

This method retrieves the value of a parameter of a running service.