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Implementation of XML Database and Enhancement of Resource and Sensor Agents. Cuong Ngo CSS497 Summer 2006 Professor Munehiro Fukuda. AgentTeamwork. Overview. Mobile agents and AgentTeamWork XML Format and XML DOM object New XML database and Applet GUI Dynamic monitoring of resources - PowerPoint PPT Presentation
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Implementation of XML Implementation of XML Database and Database and
Enhancement of Resource Enhancement of Resource and Sensor Agentsand Sensor Agents
Cuong NgoCuong NgoCSS497CSS497
Summer 2006Summer 2006Professor Munehiro FukudaProfessor Munehiro Fukuda
OverviewOverview
Mobile agents and AgentTeamWorkMobile agents and AgentTeamWork
XML Format and XML DOM objectXML Format and XML DOM object
New XML database and Applet GUINew XML database and Applet GUI
Dynamic monitoring of resourcesDynamic monitoring of resources
Future workFuture work
AgentTeamwork
AgentTeamWork OverviewAgentTeamWork Overview
FTPServer
UserA
User B
User B
snapshotsnapshot
snapshots snapshots
User program wrapper
SnapshotMethods
GridTCP
User program wrapper
SnapshotMethods
GridTCP
User program wrapper
SnapshotMethods
GridTCP
snapshot
User A’sProcess
User A’sProcess
User B’sProcess
TCPCommunication
Commander Agent
Commander Agent
Sentinel Agent
Sentinel Agent
Resource Agent
Sentinel Agent
Resource Agent
Bookkeeper Agent
BookkeeperAgent
ResultsResults
XDBXDB
Project ObjectivesProject Objectives
Replace old database, eXistReplace old database, eXist No documentation No documentation Need to include cluster informationNeed to include cluster information
Dynamically monitor resourcesDynamically monitor resources
Proper communication between agentsProper communication between agents
eXistXDBase
XML FormatXML FormatXML FileXML File DOM Object DOM Object
<department><department>
<employee><employee>
<name>John Doe</name><name>John Doe</name>
<email>[email protected]</email><email>[email protected]</email>
</employee></employee>
<employee><employee>
<name>Bill Jones</name><name>Bill Jones</name>
<email>[email protected]</<email>[email protected]</email>email>
</employee></employee>
</department></department>
Element“department”
Element“employee”
Element“email”
Element“employee”
Element“name”
Text“John Doe”
Text“Bill Jones”
Element“email”
Text“[email protected]”
Text“[email protected]”
Element “name”
DOM: Document Object ModelDOM: Document Object Model
Keeps XML structure in tactKeeps XML structure in tactDOM StructureDOM Structure NodeNode DocumentDocument ElementElement TextText
Ability to:Ability to: AddAdd DeleteDelete ModifyModify QueryQuery
Element“department”
Element“employee”
Element“email”
Element“name”
Text“John Doe”
Text“[email protected]”
Whole XML FileElement
“id”Text
“5561”
Xpath ExpressionsXpath Expressions
Xpath is a query language used to find Xpath is a query language used to find information in an XML documentinformation in an XML document
Java provides XPathAPI to use Xpath Java provides XPathAPI to use Xpath expressions to perform tasksexpressions to perform tasks
ExamplesExamples /department/employee/department/employee /department/employee[name=‘John Doe’]//department/employee[name=‘John Doe’]/ //name//name //employee[name = ‘Bill Jones’]/email/text()//employee[name = ‘Bill Jones’]/email/text() //employee/*//employee/* //name | //email//name | //email
Element“department”
Element“employee”
Element“email”
Element“employee”
Element“name”
Text“John Doe”
Text“Bill Jones”
Element“email”
Text“[email protected]”
Text“[email protected]”
Element “name”
Database OverviewDatabase Overview
Parse XML document to DOM object and create a wrapper object called Parse XML document to DOM object and create a wrapper object called ResourceResource
Modification timestampModification timestamp AvailabilityAvailability PingPing
Collection class contains ResourcesCollection class contains Resources
Database contains CollectionsDatabase contains Collections Parse and process requestParse and process request
Services connect to database and demand a requestServices connect to database and demand a request RetrievalServiceRetrievalService QueryServiceQueryService
Applet-based GUI interacts with databaseApplet-based GUI interacts with database
Database ServicesDatabase ServicesCreate a collection, synchronize by writing Create a collection, synchronize by writing database contents back to local disk, and database contents back to local disk, and shutting down of the databaseshutting down of the database
Store, retrieve and delete a collection or Store, retrieve and delete a collection or resourceresource
Update a single resource or an entire collectionUpdate a single resource or an entire collection
Query a collection for specific itemsQuery a collection for specific items
Specifically query the database for resources Specifically query the database for resources based on requirementsbased on requirements
Resource Itinerary with Cluster Resource Itinerary with Cluster InformationInformation
Old format included only IP addressesOld format included only IP addresses Assumed every IP was publicAssumed every IP was public
New format contains a cluster, its gateway New format contains a cluster, its gateway and its cluster nodes. and its cluster nodes. Use gateway to communicate between nodes Use gateway to communicate between nodes
of different clustersof different clusters Even gateway must be running Even gateway must be running
AgentTeamWork platformAgentTeamWork platform
Applet-based GUIApplet-based GUI
Graphically interact with the new databaseGraphically interact with the new database
Ability to:Ability to: Look at database contentsLook at database contents Add filesAdd files Delete filesDelete files Connect to remotely located databasesConnect to remotely located databases
Applet-based GUI 2Applet-based GUI 2
ResourceAgent ModificationsResourceAgent Modifications
Create runtime file for each cluster node Create runtime file for each cluster node
Create itinerary for SensorAgent to Create itinerary for SensorAgent to monitor nodes dynamicallymonitor nodes dynamically Query the database for all nodes within a Query the database for all nodes within a
domain, such as “UWB”domain, such as “UWB” Itinerary includes cluster and public nodesItinerary includes cluster and public nodes
Proper communication with other agentsProper communication with other agents
SensorAgent ModificationsSensorAgent ModificationsResource
id 1
Sensor Client Root
Id 4
Sensor Server Root
Id 5
Client 1Id 16
Client 2Id 17
Server 1Id 20
Server 2Id 21
XDBase
SensorAgent Modifications 2SensorAgent Modifications 2Resource
id 1
Public ClientRootId 17
SensorRootId 4
Gateway 1Id 16
Gateway 2Id 64
G1 ClientRootId 65
G1 ServerRootId 66
Public Server RootId 18
Server 2Id 73
G2 ClientRoot
Id 256
G2 Server Root
Id 257
Client 1Id 68
Client 2Id 69
Server 1Id 72
G2 Client 1Id 1024
G2 Server 1Id 1028
Cluster 2
Cluster 1
XDBase
Future Expansions of DatabaseFuture Expansions of Database
Easy to add new functionality to databaseEasy to add new functionality to database Create a service to send a request to Create a service to send a request to
databasedatabase Database parses and processes the requestDatabase parses and processes the request Database send back resultsDatabase send back results
Future AgentTeamWork TasksFuture AgentTeamWork Tasks
SensorAgentSensorAgent Have 2 cluster gateways perform bandwidth Have 2 cluster gateways perform bandwidth
test to monitor inter-cluster bandwidthtest to monitor inter-cluster bandwidth
Need communication to change Need communication to change unavailable nodes to available when a job unavailable nodes to available when a job is completeis complete CommanderAgent informs ResourceAgent CommanderAgent informs ResourceAgent
which in turns creates a service request to the which in turns creates a service request to the databasedatabase
What I LearnedWhat I Learned
XML, DOM object, XpathXML, DOM object, Xpath
Grid computing programmingGrid computing programming
Communication between team membersCommunication between team members
Understanding existing code and Understanding existing code and modifying it without breaking itmodifying it without breaking it
AcknowledgementsAcknowledgements
Advisor Prof. Munehiro FukudaAdvisor Prof. Munehiro Fukuda
Sponsor Prof. Shinya KobayashiSponsor Prof. Shinya Kobayashi
Emory HorvathEmory Horvath
CSS301, CSS342, CSS343, CSS434, CSS301, CSS342, CSS343, CSS434, CSS442, CSS360CSS442, CSS360
XML and Java, 2XML and Java, 2ndnd Edition book Edition book
Questions ?Questions ?
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