Web Services and AIXM by vev19514

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									Web Services and AIXM
                  Introduction
Subramanyam “Subbu” Nadavala
Contractor, L-3 Communications

FAA Air Traffic Organization (ATO) Information Technology
Engineering & Configuration Management

Subramanyam.CTR.Nadavala@faa.gov
+1 405 464 3545
        What is a Web Service?
•   A Web Service is a URL-addressable software resource that
    performs functions (or a function)

•   Web Services are platform independent

•   Web Service interfaces are defined in Web Service Description
    Language (WSDL) and communicate using standard protocol
    known as SOAP (Simple Object Access Protocol)

•   A Web Service performs a set of tasks, query/request information,
    update information and much more

    –   Example : Get list of FIXES in Texas
          Web Services
       Development Process
• Popular technologies used WSDL, XML, XSLT,
  SOAP, AXIS, J2EE and OC4J

• Define web service business requirements –
  service functionality
  – Web service provider
  – Web service consumer
 Web Services Architecture
                                          Oracle ESB

Service Consumers                                                                                 Service Providers


                            Web Feature Request                             Web Feature Request
 Instrument Procedure                                                                                FIX Web service
  Development System          AIXM Response                                    AIXM Response




                                                   Enterprise Service Bus
                             Web Feature Request                            Web Feature Request
Procedure Tracking System                                                                          Airport Web service
                                AIXM Response                                  AIXM Response




                             Web Feature Request
         SIAP
                                 AIXM Response                              Web Feature Request
                                                                                                   Obstacle Web service
                                                                             AIXM Response




                             Web Feature Request
          FIX
                                AIXM Response
  Web Service Provider Tasks
• Design and develop WSDL and XML
  Schemas
• Publish WSDL and XML Schemas
• Develop web service provider functionality
  according to the WSDL
• Deploy web service provider code to the
  server
Provider Functionality Flow
                                         Receive Web Feature Request




                               Determine the request

   Invalid Request                                                    Valid Request



       Sends SOAP Fault Response                         Call database or external
                                                       system to get the information




                                                       Construct AIXM Object using
                                                                  XSLT




                                                             Sends AIXM Object
                                                                 Response
    Web Service Client Tasks
• Generate web service client programs
  using WSDL
• Access the web service
• Send request as WFS, receive response
  as AIXM Message
Request and Response Objects
• Web Feature Request Object
• AIXM Response Object
• Examples
  Web Feature Request Payload
<?xml version="1.0" encoding="UTF-8"?>
<req:GetFeatureRequest xmlns:aixm="http://www.aixm.aero/schema/5.0"
      xmlns:gml="http://www.opengis.net/gml"
      xmlns:xlink="http://www.w3.org/1999/xlink"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:req="http://www.faa.gov/avnis/ipws/messages"
      xmlns:wfs="http://www.opengis.net/wfs"
      xmlns:ogc="http://www.opengis.net/ogc"
      xmlns:ows="http://www.opengis.net/ows"
      xsi:schemaLocation="http://www.faa.gov/avnis/ipws/messages ..\..\..\wsdl\faa\1.0.0\ipws-messages.xsd"
      Encoding="UTF-8">
<wfs:GetFeature outputFormat="text/xml; subtype=gml/3.1.1" resultType="results" traverseXlinkDepth="0">
<wfs:Query typeName="aixm:DesignatedPoint">
<ogc:Filter>
  <ogc:BBOX>
      <!-- wfs:GetFeature: Retrieve all aixm:DesignatedPoint types that are within 25 Square miles of (39.8719444,-
      75.2411389). -->
      <ogc:PropertyName />
      <gml:Envelope srsName="NAD83">
      <gml:lowerCorner>39.45527773333333 -75.65780556666667</gml:lowerCorner>
      <gml:upperCorner>40.28861106666666 -74.82447223333332</gml:upperCorner>
      </gml:Envelope>
      </ogc:BBOX>
   </ogc:Filter>
  </wfs:Query>
 </wfs:GetFeature>
</req:GetFeatureRequest>
              AIXM Response Object
<?xml version="1.0" encoding="UTF-8"?>
<fix:FixHoldingDataMessage xmlns:dpshare="http://www.faa.gov/avnis/dpshare"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xmlns:faa="http://faa.gov/infra/fix/ipws/logical/beans"
                  xmlns:aixm="http://www.aixm.aero/schema/5.0"
                  xmlns:xlink="http://www.w3.org/1999/xlink"
                  xmlns:gml="http://www.opengis.net/gml/3.2"
                  xmlns:fix="http://www.faa.gov/avnis/fixes"
                  gml:id="FixHoldingDataMessage"
                  xsi:schemaLocation="http://www.faa.gov/avnis/fixes
      U:/AVNCommon/ITS_Projects/App_Support/WebService/AIXM/11062007 schemas/FPP-Fix_Holding_Data.xsd">
  <fix:hasMember>
    <aixm:DesignatedPoint gml:id="DesignatedPoint-26973">
      <gml:identifier codeSpace="http://www.faa.gov/AVNIS/Fix"/>
      <aixm:timeSlice>
        <aixm:DesignatedPointTimeSlice gml:id="DesignatedPoint-26973-0">
          <gml:validTime>
            <gml:TimePeriod gml:id="DesignatedPoint-26973-0-TimePeriod">
              <gml:beginPosition indeterminatePosition="unknown"/>
              <gml:endPosition>2006-08-03T00:00:00</gml:endPosition>
            </gml:TimePeriod>
          </gml:validTime>
          <aixm:interpretation>BASELINE</aixm:interpretation>
          <aixm:designator>JUNES</aixm:designator>
          <aixm:name>JUNES</aixm:name>
<aixm:isLocatedAt> AIXM Response Object
             <aixm:Point>
               <gml:pos srsName="NAD83">+39.92460555555555 -74.953325</gml:pos>
             </aixm:Point>
           </aixm:isLocatedAt>
           <aixm:extension>
             <fix:DesignatedPointExtension gml:id="DesignatedPoint-26973-0-Extension">
               <fix:provides>
                  <fix:DesignatedPointNASUse/>
               </fix:provides>
               <fix:extends>
                  <dpshare:featureExtension>
                    <dpshare:productionStatus>H</dpshare:productionStatus>
                    <dpshare:revision>0</dpshare:revision>
                    <dpshare:lastUpdateDate>2007-11-14T10:24:48</dpshare:lastUpdateDate>
                    <dpshare:lastUpdatedBy>VARGASS</dpshare:lastUpdatedBy>
                    <dpshare:stateTerritory>NJ</dpshare:stateTerritory>
                    <dpshare:country>US</dpshare:country>
                  </dpshare:featureExtension>
               </fix:extends>
             </fix:DesignatedPointExtension>
           </aixm:extension>
         </aixm:DesignatedPointTimeSlice>
       </aixm:timeSlice>
     </aixm:DesignatedPoint>
  </fix:hasMember>
</fix:FixHoldingDataMessage>
      Web Services Security
• SOAP Headers with Tokens
• Transport level security, HTTPS
• Authentication, Authorization and
  Confidentiality
Web Services Demo
         Questions ?
        Contact Information

Subramanyam.CTR.Nadavala@faa.gov

         +1 405 464 3545

								
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