context.arch.server
Class SUser

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.SUser

public class SUser

extends Server

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

See Also:

Server

Field Summary

static java.lang.String	CLASSNAME Name of server
static java.lang.String	USERNAME Tag to indicate user name (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

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

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

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

SUser(java.lang.String name, WidgetHandles widgets)
Constructor that creates a user server for user name on the DEFAULT_PORT.

Method Summary

static void	main(java.lang.String[] argv) Main method to create a server with name, port and widgets specified by command line arguments.
protected AttributeNameValues	queryGenerator() This abstract 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

USERNAME

public static final java.lang.String USERNAME

Tag to indicate user name (our key)

Constructor Detail

SUser

public SUser(int port,
             java.lang.String name,
             WidgetHandles widgets)

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

Parameters:

name - User name this server is attached to

port - Port this server is listening on

widgets - Set of widgets this server monitors

SUser

public SUser(int port,
             java.lang.String name,
             boolean storageFlag,
             WidgetHandles widgets)

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

Parameters:

name - User name this server is attached to

port - Port this server is listening on

widgets - Set of widgets this server monitors

storageFlag - Flag to indicate whether storage is enabled or not

SUser

public SUser(java.lang.String name,
             WidgetHandles widgets)

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

Parameters:

name - User name this server is attached to

widgets - Set of widgets this server monitors

SUser

public SUser(java.lang.String name,
             boolean storageFlag,
             WidgetHandles widgets)

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

Parameters:

name - User name 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 abstract 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 USERNAME='username'

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 name, port and widgets specified by command line arguments. Each widget is specified by: host, port, id