Barry Atkins Heather Kreger Steve Graham Micro Managing – Implementing WSDM in the Small Tiny WSDM...

Barry AtkinsHeather KregerSteve Graham

Micro Managing – Implementing WSDM in the Small

Tiny WSDM Demo

© 2004 IBM Corporation WS-Resource framework

Agenda

The Demo

Motivation

Tiny WSRF - Resource Properties

Tiny WS-Notifications – Base Notifications

Tiny WSDM

• WSDM Management Event

• Identity

How Hard was That?


Motivation

Show that WSDM and its requisite specifications can be implemented in resource constrained devices

WSDM composes for minimal

WSDM, WS-Addressing, WSRF, WS-N were designed to be composable to allow for minimal implementation requirements in simple or constrained implementations

WDSM composes for the enterprise

WSDM, WS-Addressing, WSRF, WS-N also provide composable functionality required to support complex, large scale systems.


Topology

BESServer

WAS 5.1(Wireless GW)

1

2

3

4(1) Blackberry connects to Wireless GW via BES tunneling

(2) Client “discovers” Blackberry via Wireless GW(3) WSRF, WSN message exchanges to Wireless GW

(proxy)(4) WSRF, WSN message exchanges to Blackberry WSRF

and WSN Endpoint

WSRFand WSN Endpoint


Functionality

“port” of ETTK WSRF-ResourceProperties

• GetResourceProperties- Retrieve value from Blackberry

Date, Time, Serial#, BatteryLevel, BatteryStatus, AllocatedStorage, FreeStorage, total code module size (0(n) calc)

• GetMultipleResourceProperties• GetResourcePropertiesDocument

- Equivalent to WS-Transfer Get

• SetResourceProperties (update)- Modify value of Blackberry

Date, Time, Color (this faults)

• WSRF-BaseFaults• Blackberry GUI

“port” of ETTK WSN

• NotificationProducer- Just subscribe request/response- ShowSubscriptions

• Detect situation and format message for- Date change and time change (from WSRF Set)

• Drive notification message to consumer via EPR

JVM

KSoap (40k)

WSRF (19k)

WSN (32k)

WSDM (12k)

102K


Cost

1 developer 25 days

• Developer had good knowledge of Blackberry programming

• Good knowledge of ETTK

• No background with WSRF, WS-N, or WSDM


Implementation

The demo consists of:

Running on the Server device.

• Web interface• Web services running on WAS 6.0

Running on the Blackberry device.

• Client code consisting of a tiny soap engine • Soap server

WirelessDeviceGateway web service EndpointReference for the TinyWSRF implementation

• Forwards the requests to the various devices via a variety of device-specific transports

• The device is specified by a device property contained in the soap header. (wsa reference property)


Tiny WSRF


Tiny WSRF GetResourceProperty


Tiny WSRF – GetMultipleResourceProperties


Tiny WSRF - SetResourceProperty


Tiny WSRF GetResourcePropertiesDocument


Tiny Notifications - Subscriptions

Subscriptions may be created for the following topics :

Date_Change

- notification is performed when the device's date is changed

Inbox_Change

- notification is performed when the device's email inbox is changed (email added or deleted)

Outbox_Change

- notification is performed when the device's email inbox is changed (email added or deleted)

CodeModuleSize_Change

- notification is performed when the code size for all installed modules changes.


Tiny Notifications - Subscribe


Tiny Notifications - Unsubscribe


Tiny Notifications – ShowSubscriptions


Tiny Notifications – Seeing Notifications


Tiny Notifications – Notification received


It’s a WSDM Management Event!

<ManagementEvent>

<sourceComponentId>

<wsa:componentAddress xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing">

<wsa:Address> http://9.27.80.182:4400/WSRF4PDA_V6/services/WSRFWirelessDeviceGateway

</wsa:Address>

<wsa:ReferenceProperties>

<ResourceId xmlns="http://resource.wsrfimpl.ettk.ibm.com">

4:2100000a

</ResourceId>

<device xmlns="http://rim.pda">

RIM2100000a

</device>

</wsa:ReferenceProperties>

</wsa:componentAddress>

<Caption>

BlackBerry Device 2100000a

</Caption>

</sourceComponentId>

<situation>

<situationType>

ReportSituation

</situationType>

<msg>

Date change occurred

</msg>

</situation>

<eventId>

http://rimpda/RIM2100000a/20041225175424660

</eventId>

<reportTime>

2004-12-25T17:54:24.660Z

</reportTime>

</ManagementEvent>


Tiny WSDM

The WSDM demo consists of the following scenario :

1. A subscription is created for the topic "CodeModuleSize" on the Blackberry.

2. An application is installed on the device, triggering a notification.

3. The NotificationConsumer receives the notification, and asks the device for a list of installed applications.

4. The list is compared to a known list of legal applications (via policy).

5. A request to remove the offending application(s) is sent to the device, which uninstalls the requested application(s).


Tiny WSDM – Subscribe to CodeModuleSizeChange


TinyWSDM – Load a New Application - HelloWorld

At: http://barryxplaptop:4400/WSRF4PDA_V6/jad.html


Tiny WSDM – Get Link to New Application


TinyWSDM – Download New Application


TinyWSDM – Application Installed!


TinyWSDM –Notification Received & Application Removed


TinyWSDM – Application Removed

Device limitation: Icons on the Blackberry are only removed when the device is rebooted

• The HelloWorld application appears to remain installed becausethe icon appears on the device

• The HelloWorld application is not listed in the list of installed applications


How hard was that?

The device code consists of 2 components : A server component, and a UI component.

The server component runs automatically in the background. It connects to the WirelessDeviceGateway, and identifies itself using the device’s PIN.

The UI component provides simple feedback and configuration of the server component. It displays messages as they are received from the WirelessDeviceGateway, as a result of GetResourceProperty, etc requests. (not necessary)


How much code?

Code size written : 4000 lines

Total compiled code size is 102Kb

Blackbarry: 4 main packages,

• ksoap2.cod 62,620 (library) (the soap engine/xml parser)• TinyWSRF.cod 19,724 (library) (code WSRF implementation)• WSRFController.cod 8,772 (application)• WSRFServer.cod 12,880 (application)

Server Code

• Module which handles the device-specific transport of the SOAP Envelope for the data transport for several different devices (WiFi, SMS, cellular, etc) that is transparent to the caller.

• Various JSPs & servlets for running the demo.


Nitty Gritty Details

package com.ibm.tinywsrf – 1448 lines

1,296 DocServer.java

2,659 EndpointReference.java

1,827 Notification.java

1,365 NotificationManager.java

10,089 NotificationMessage.java

2,765 NotificationProducer.java

951 ResourceProperties.java

9,284 Resources.java

3,232 Subscription.java

7,124 SubscriptionManager.java

5,067 Utils.java

4,610 WSConstants.java

2,294 WSRFConstants.java

package com.ibm.wsrpcontroller- - 760 lines

962 Controller.java

6,146 mainApp.java

3,568 SubscriptionsScreen.java

2,558 WDGSetupScreen.java

2,677 WSRPControllerScreen.java

package com.ibm.tinywsrfserver - 1019 lines

2,005 AppWatcher.java

19,584 CommandProcessor.java

1,931 DateWatcher.java

3,801 MailWatcher.java

5,404 mainApp.java

2,270 SOAPProcessor.java

107 UIListener.java

469 Watcher.java

package com.ibm.wireless.rim - 828 lines

2,257 Marshaller.java

717 MarshallObject.java

682 Persistant.java

472 SOAPListener.java

11,395 SOAPServer.java

1,504 WDGSetup.java

2,417 WebService.java

4,136 WebServiceProxy.java


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