context.arch.server
Class SId

java.lang.Object
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  +--context.arch.BaseObject
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        +--context.arch.widget.Widget
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              +--context.arch.server.Server
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                    +--context.arch.server.SId

public class SId

extends Server

This class implements an user id server. It should subscribe to all the widgets that could provide information about its user id.

See Also:

Server

Field Summary

static java.lang.String	CLASSNAME Name of server
protected java.lang.String	userid
static java.lang.String	USERID Tag to indicate user id (our key)
java.lang.String	VERSION_NUMBER Widget version number

Fields inherited from class context.arch.server.Server

DEFAULT_PORT, widgets

Fields inherited from class context.arch.widget.Widget

attributes, attributeTypes, callbacks, CLASS, CurrentOffset, DEFAULT_PORT, id, PUT_DATA, PUT_DATA_REPLY, QUERY, QUERY_ATTRIBUTES, QUERY_ATTRIBUTES_REPLY, QUERY_CALLBACKS, QUERY_CALLBACKS_REPLY, QUERY_REPLY, QUERY_SERVICES, QUERY_SERVICES_REPLY, QUERY_VERSION, QUERY_VERSION_REPLY, services, SPACER, storage, subscribers, TIMESTAMP, UPDATE, UPDATE_AND_QUERY, UPDATE_AND_QUERY_REPLY, VERSION, VERSION_NUMBER

Fields inherited from class context.arch.BaseObject

communications, EXIT_OK, handlers, ID, parser, PING, PING_REPLY, serviceHandlers

Constructor Summary

SId(int port, java.lang.String userid, boolean storageFlag, WidgetHandles widgets)
Constructor that creates a user id server for the user id on the specified port.

SId(int port, java.lang.String userid, WidgetHandles widgets)
Constructor that creates a user id server for the user id on the specified port.

SId(java.lang.String userid, boolean storageFlag, WidgetHandles widgets)
Constructor that creates a user server for user id on the DEFAULT_PORT.

SId(java.lang.String userid, WidgetHandles widgets)
Constructor that creates a user server for user id on the DEFAULT_PORT.

Method Summary

static void	main(java.lang.String[] argv) Main method to create a server with userid, port and widgets specified by command line arguments.
protected AttributeNameValues	queryGenerator() This method is called when the widget wants to get the latest generator info.
protected Conditions	setConditions() This method sets the conditions to apply to the server's subscriptions.
protected Attributes	setServerAttributes() This method sets the attributes for the server - those that are specific to the server, and not contained in the widgets it subscribes to.
protected Callbacks	setServerCallbacks() This method set the callbacks for a server - those that are specific to the server, and not contained in the widgets it subscribes to.
protected Services	setServerServices() This method set the services for a server - those that are specific to the server, and not contained in the widgets it subscribes to.

Methods inherited from class context.arch.server.Server

handle, queryWidget, serverSetup, setAttributes, setCallbacks, setServices, setWidgets, startSubscriptions, storeAttributeNameValues

Methods inherited from class context.arch.widget.Widget

addSubscriber, canHandle, canHandle, canHandle, canHandle, executeService, getAttributeType, getCurrentTime, getNewOffset, getNewOffsetNoDelay, isAttribute, isCallback, notify, processCallbackReply, putData, queryAttributes, queryCallbacks, queryServices, removeSubscriber, retrieveData, runUserMethod, runWidgetMethod, sendToSubscribers, setAttribute, store, store, updateWidgetInformation

Methods inherited from class context.arch.BaseObject

askInterpreter, decodeData, encodeData, executeAsynchronousWidgetService, executeSynchronousWidgetService, getHostAddress, getId, getVersion, getVersion, getWidgetAttributes, getWidgetCallbacks, getWidgetServices, pingComponent, pollWidget, putDataInWidget, queryVersion, quit, retrieveDataFrom, retrieveDataFrom, retrieveDataFrom, retrieveDataFrom, retrieveDataFrom, retrieveDataFrom, retrieveDataFrom, returnPing, runComponentMethod, runMethod, serviceResult, setId, setVersion, subscribeTo, subscribeTo, subscribeTo, subscribeTo, unsubscribeFrom, updateAndPollWidget, userCallback, userRequest, userRequest, userRequest

Methods inherited from class java.lang.Object

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

Field Detail

VERSION_NUMBER

public java.lang.String VERSION_NUMBER

Widget version number

CLASSNAME

public static final java.lang.String CLASSNAME

Name of server

USERID

public static final java.lang.String USERID

Tag to indicate user id (our key)

userid

protected java.lang.String userid

Constructor Detail

SId

public SId(int port,
           java.lang.String userid,
           WidgetHandles widgets)

Constructor that creates a user id server for the user id on the specified port. This server monitors the set of widgets in widgets with storage enabled.

Parameters:

port - Port this server is listening on

userid - User id this server is attached to

widgets - Set of widgets this server monitors

SId

public SId(int port,
           java.lang.String userid,
           boolean storageFlag,
           WidgetHandles widgets)

Constructor that creates a user id server for the user id on the specified port. This server monitors the set of widgets in widgets with storage functionality set to storageFlag

Parameters:

port - Port this server is listening on

userid - User id this server is attached to

widgets - Set of widgets this server monitors

storageFlag - Flag to indicate whether storage is enabled or not

SId

public SId(java.lang.String userid,
           WidgetHandles widgets)

Constructor that creates a user server for user id on the DEFAULT_PORT. This server monitors the set of widgets in widgets with storage enabled.

Parameters:

userid - User id this server is attached to

widgets - Set of widgets this server monitors

SId

public SId(java.lang.String userid,
           boolean storageFlag,
           WidgetHandles widgets)

Constructor that creates a user server for user id on the DEFAULT_PORT. This server monitors the set of widgets in widgets with storage functionality set to storageFlag

Parameters:

userid - User id this server is attached to

widgets - Set of widgets this server monitors

storageFlag - Flag to indicate whether storage is enabled or not

Method Detail

queryGenerator

protected AttributeNameValues queryGenerator()

This method is called when the widget wants to get the latest generator info. Maybe we should query our widgets here?

Overrides:

queryGenerator in class Widget

Returns:

Attributes containing the latest generator information

setServerAttributes

protected Attributes setServerAttributes()

This method sets the attributes for the server - those that are specific to the server, and not contained in the widgets it subscribes to. Currently, there are none.

Overrides:

setServerAttributes in class Server

Returns:

Attributes object containing the server-specific attributes

setServerCallbacks

protected Callbacks setServerCallbacks()

This method set the callbacks for a server - those that are specific to the server, and not contained in the widgets it subscribes to. Currently, there are none.

Overrides:

setServerCallbacks in class Server

Returns:

Callbacks object containing the server-specific callbacks

setServerServices

protected Services setServerServices()

This method set the services for a server - those that are specific to the server, and not contained in the widgets it subscribes to. Currently, there are none.

Overrides:

setServerServices in class Server

Returns:

Services object containing the server-specific services

setConditions

protected Conditions setConditions()

This method sets the conditions to apply to the server's subscriptions. The condition for the User Server is USERID='userid'

Overrides:

setConditions in class Server

Returns:

Conditions containing condition info for server subscriptions

main

public static void main(java.lang.String[] argv)

Main method to create a server with userid, port and widgets specified by command line arguments. Each widget is specified by: host, port, id