1 / 17

Python Web/Grid Services

Python Web/Grid Services. Presenter: Joshua Boverhof Lawrence Berkeley National Lab. Webpage: http://pywebsvcs.sourceforge.net/ http://dsd.lbl.gov/gtg/projects/download/download_info.html Demo: http://dsd.lbl.gov/~boverhof Email: JRBoverhof@lbl.gov Pywebsvcs-talk@lists.sourceforge.net.

lila-oconnor
Télécharger la présentation

Python Web/Grid Services

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Python Web/Grid Services Presenter: Joshua Boverhof Lawrence Berkeley National Lab.

  2. Webpage: http://pywebsvcs.sourceforge.net/ http://dsd.lbl.gov/gtg/projects/download/download_info.html Demo: http://dsd.lbl.gov/~boverhof Email: JRBoverhof@lbl.gov Pywebsvcs-talk@lists.sourceforge.net Project links

  3. Overview ZSI -- Zolera SOAP implementation • wsdl2python -- WSDL/XML Schema • Generate Client: Locators, Ports, Messages • Generate Service: ServiceSOAPBinding pyGridWare -- WS-Resource Framework • New Directions: Basic Profile, WS-Addressing, WS-Resource, XML Message Security

  4. WSDL Info Items <service> <binding> <portType> <messsage> <types> <port> <operation> <operation> <input> <input> <output> <output>

  5. WSDL to Python <service> <binding> <portType> <messsage> <types> <port> <operation> <operation> <part> <schema> Types Locator SOAPPort elements messages

  6. TypeCodes: Describing the data • ZSI.TypeCode “aname”: specifies python attribute name TypeCode will access for element value when parsing and serializing. --wsdl2py convention specify aname as “_name” • Facets: minOccurs, maxOccurs, nillable --ZSI TypeCodes expects repeatable (maxOccurs>1) elements to be specified in sequences.

  7. Elements, Types, and TypeCodes WSDL from http://soap.systinet.net/demos/FreeDB/wsdl <wsdl:message name='FreeDBService_searchByTrack_Response'> <wsdl:part name='response' element='ns0:ArrayOfCDInfo_Response'/> </wsdl:message> <xsd:element name="ArrayOfCDInfo_Response” nillable="true” type="xns4:ArrayOfCDInfo"/> <xsd:complexType name="ArrayOfCDInfo"> <xsd:sequence> <xsd:element maxOccurs="unbounded" minOccurs="0" name="CDInfo" nillable="true" type="tns:CDInfo"/> </xsd:sequence> </xsd:complexType> <xsd:complexType name="CDInfo"> <xsd:sequence> <xsd:element name="artist" nillable="true” type="xsd:string"/> <xsd:element name="category" nillable="true” type="xsd:string"/> <xsd:element name="discId" nillable="true” type="xsd:string"/> <xsd:element name="title" nillable="true” type="xsd:string"/> </xsd:sequence> </xsd:complexType>

  8. Elements --> XML Instance <e:Envelope xmlns:e="http://schemas.xmlsoap.org/soap/envelope/" xmlns:d="http://www.w3.org/2001/XMLSchema" xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:wn0="http://systinet.com/wsdl/com/systinet/demo/freedb/" xmlns:wn1="http://systinet.com/xsd/SchemaTypes/" xmlns:wn2="http://idoox.com/interface"> <e:Body> <wn1:ArrayOfCDInfo_Response i:type="wn0:ArrayOfCDInfo"> <wn0:CDInfo i:type="wn0:CDInfo"> <wn0:artist i:type="d:string">Deftones et Slipknot</wn0:artist> <wn0:category i:type="d:string">rock</wn0:category> <wn0:discId i:type="d:string">23110313</wn0:discId> <wn0:title i:type="d:string">Personnalisé</wn0:title> </wn0:CDInfo> … </e:Body> </e:Envelope>

  9. Generated Client Modules _services.py _types.py Types elements Locator SOAPPort messages %wsdl2py -u http://soap.systinet.net/demos/FreeDB/wsdl %python >>>from com_systinet_demo_freedb_FreeDBService_services import * >>>loc = JavaServiceLocator() >>>port = loc.getFreeDBService() >>>msg = port.searchByArtist(’Slipknot') >>> msg <com_systinet_demo_freedb_FreeDBService_services_types.ArrayOfCDInfo_Response_Dec> >>> len(msg._CDInfo) 74 >>> msg._CDInfo[49]._title u'My Plague (New Abuse Mix)'

  10. Generated Service Module _services_server.py _services.py _types.py Types elements ServiceSOAP Binding messages %wsdl2dispatch -u http://soap.systinet.net/demos/FreeDB/wsdl %python >>>from com_systinet_demo_freedb_FreeDBService_services_server import * >>>from ZSI.ServiceContainer import AsServer >>>AsServer(port=8080,services=(com_systinet_demo_freedb_FreeDBService(),))

  11. Service Module class com_systinet_demo_freedb_FreeDBService(ServiceSOAPBinding): soapAction = { 'http://systinet.com/wsdl/com/systinet/demo/freedb/FreeDBService#getDetails#':'soap_getDetails', 'http://systinet.com/wsdl/com/systinet/demo/freedb/FreeDBService#search#':'soap_search', 'http://systinet.com/wsdl/com/systinet/demo/freedb/FreeDBService#searchByArtist#':'soap_searchByArtist', 'http://systinet.com/wsdl/com/systinet/demo/freedb/FreeDBService#searchByTitle#':'soap_searchByTitle', 'http://systinet.com/wsdl/com/systinet/demo/freedb/FreeDBService#searchByTrack#':'soap_searchByTrack', } def __init__(self, post='/FreeDB/', **kw): ServiceSOAPBinding.__init__(self, post) def soap_searchByArtist(self, ps): # input vals in request object args = ps.Parse( FreeDBService_searchByArtist_1_Request() ) # assign return values to response object response = FreeDBService_searchByArtist_Response() #User Adds some logic to do something if args == ‘Slipknot’: class Holder: pass response._CDInfo = [Holder()] response._CDInfo[0]._title = 'My Plague (New Abuse Mix) ' response._CDInfo[0]._artist = ’SLIPKNOT' return response

  12. New Directions: pyGridWare • WS-Resource: Stateless web services paradigm, implied factory pattern. • WS-Address: Specify resource identity in SOAP Header. • Message-Level Security

  13. Implied Resource Pattern Soap:Header Service client Body 1 Model State create 2 3 epr value response epr 5 epr epr 4 epr operation

  14. $wsdl2py -f counter_service.wsdl -a Client for WS-Resource • Client generated in same way… Just specify WS-Addressing • Create operation -- receives an EndpointReference containing a resource ID. This is used to refer back to the stateful instance. • Drop EndpointReference into a new port. • New port refers to a stateful service

  15. Create XML Instance <SOAP-ENV:Envelope xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <SOAP-ENV:Header xmlns:ns1="http://schemas.xmlsoap.org/ws/2003/03/addressing"> <ns1:MessageID id="567080">uuid:1087253160.24</ns1:MessageID> <ns1:Action id="54e808">http://counter.com/service/CounterPortType/createCounterRequest</ns1:Action> <ns1:To id="73338">http://bundy.localdomain:8080/wsrf/services/CounterService</ns1:To> </SOAP-ENV:Header> <SOAP-ENV:Body xmlns:ns1="http://counter.com"> <ns1:createCounter></ns1:createCounter> </SOAP-ENV:Body> </SOAP-ENV:Envelope> %python >>>import pyGridWare.generated.stubs.Counter_services as COUNTER >>>locator = COUNTER.CounterServiceLocator() >>>port = locator.getCounterPortType() >>>msg = port.createCounter(COUNTER.CreateCounterRequest())

  16. Create Response XML Instance <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:wsa="http://schemas.xmlsoap.org/ws/2003/03/addressing"> <soapenv:Header> <wsa:MessageID soapenv:mustUnderstand="0">uuid:E77B0490-BE5B-11D8-92A0</wsa:MessageID> <wsa:To soapenv:mustUnderstand="0">http://schemas.xmlsoap.org/ws/2003/03/addressing/role/anonymous</wsa:To> <wsa:Action soapenv:mustUnderstand="0">http://counter.com/service/CounterPortType/createCounterResponse </wsa:Action> <wsa:From><wsa:Address>http://bundy.localdomain:8080/wsrf/services/CounterService</wsa:Address></wsa:From> <ns0:RelatesTo RelationshipType="wsa:Response" soapenv:mustUnderstand="0" xmlns:ns0="http://schemas.xmlsoap.org/ws/2003/03/addressing">uuid:1087255976.97</ns0:RelatesTo> </soapenv:Header> <soapenv:Body> <createCounterResponse xmlns="http://counter.com"> <wsa:EndpointReference> <wsa:Address>http://bundy.localdomain:8080/wsrf/services/CounterService</wsa:Address> <wsa:ReferenceProperties> <CounterKey>27378735</CounterKey> </wsa:ReferenceProperties> </wsa:EndpointReference> </createCounterResponse> </soapenv:Body> </soapenv:Envelope>

  17. Add Operation <SOAP-ENV:Envelope xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <SOAP-ENV:Header xmlns:ns1="http://schemas.xmlsoap.org/ws/2003/03/addressing" xmlns:ns2="http://counter.com"> <ns1:MessageID id="740980">uuid:1088447466.12</ns1:MessageID> <ns1:Action id="55b610">http://counter.com/service/CounterPortType/addRequest</ns1:Action> <ns1:To id="107a260">http://bundy.localdomain:8080/wsrf/services/CounterService</ns1:To> <ns2:CounterKey id="107a6b0">12399227</ns2:CounterKey> </SOAP-ENV:Header> <SOAP-ENV:Body xmlns:ns1="http://counter.com"> <ns1:add id="18085d0">11</ns1:add> </SOAP-ENV:Body> </SOAP-ENV:Envelope> >>>msg = port.createCounter(COUNTER.CreateCounterRequest()) >>>port = locator.getCounterPortType(endPointReference=msg._EndpointReference) >>>msg = port.add(11)

More Related