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Trading for COTS components in Open Environment EUROMICRO’2001 http://www.euromicro.org

Trading for COTS components in Open Environment EUROMICRO’2001 http://www.euromicro.org. WEST – T4. Málaga, May 22-25. Introduction. top-down. bottom-up. CBSE. - times costs efforts + flexibility + reliability + reusability. Software development. Off-the-shelf components.

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Trading for COTS components in Open Environment EUROMICRO’2001 http://www.euromicro.org

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  1. Trading for COTS components in Open Environment EUROMICRO’2001 http://www.euromicro.org WEST – T4. Málaga, May 22-25

  2. Introduction top-down bottom-up CBSE • -times • costs • efforts • + flexibility • + reliability • + reusability Software development Off-the-shelf components Repository trader

  3. exporter A trader service 4 importer 5 1 3 export() 2 query() trader

  4. Requirements for a COTS trader Delegation Heterogeneous component model Use of heuristics and metrics Federation Service composition and adaptation extensible/scalable Multiples interfaces. automatic/store and forward push/pull models Signature information is not enough Softmatchmaking

  5. Current traders ODP model: ODP trading service, ISO/ITU-T. • ORBacus (OOC/IONA). http://www.ooc.com • OpenORB (Intalio). http://www.openorb.org • AceORB (TAO). http://www.cs.wustl.edu/schmidt/ACE • VisiBroker (Borland). http://www.borland.com/visibroker

  6. ODP trader shortcomings • Use homogeneous object model. • Use direct federation. • Do not allow service composition or adaptation. • Exact matches at the signature level only. • Do not allow multiple interfaces. • They are based on a push model only.

  7. Services and service types ODP trading service specification: “A service is a set of capabilities provided by an object at a computational level. A service is an instance ofservice type”

  8. export COTS XML repository import COTStrader EXPORTER WEB EXPORT INTERFACE templates WEB IMPORT INTERFACE IMPORTER

  9. COTStrader: spec template Packaging Functional Non Functional Marketing

  10. COTStrader module OnePlaceBuffer { // Provided interfaces interface OnePlaceBuffer { void write(in long x); long read(); }; // Required interfaces interface out { oneway void print(in long x); }; }; Example CORBA IDL

  11. export import COTStrader EXPORTER WEB EXPORT INTERFACE COTS XML repository templates WEB IMPORT INTERFACE IMPORTER

  12. COTStrader: Exporting   <?xml-stylesheet type="text/xsl" href="http://www.cotstrader.com/COTS-XMLStyle.xsl"?>   <COTScomponent name="OnePlaceBuffer"       xmlns="http://www.cotstrader.com/COTS-XMLSchema.xsd"       xmlns:types="http://www.w3.org/2000/10/XMLSchema">   <functional>... </functional>   <properties> ... </properties>   <packaging>... </packaging>   <marketing>...</marketing> </COTScomponent>

  13. COTStrader: Exporting Functional information:  <functional> <providedInterfaces>. . . </providedInterfaces>  <requiredInterfaces>. . .</requiredInterfaces>  <serviceAccessProtocol>. . .</serviceAccessProtocol>  </functional>

  14. COTStrader: Exporting Functional information example: providedInterfaces. <providedInterfaces>   <interface name="OnePlaceBuffer">    <description notation="CORBA-IDL">  ´ interface OnePlaceBuffer {              void write(in long x);long read();          };    </description>    <behavior notation="Larch">      <description notation= "Java/Larch"        href="http://www.cotstrader.com/samp/OPB/OnePlaceBuffer.beh"      </description>      <exactMatching href="http://liribarn.ual.es:8080/servlet/Larch.exactMatch"/>      <softMatching href="http://liribarn.ual.es:8080/servlet/Larch.softMatch"/>    </behavior>  </interface> </providedInterfaces>

  15. COTStrader: Exporting Functional information example: requiredInterfaces.   <requiredInterfaces>     <interface name="out">       <description notation="CORBA-IDL">interface out {             oneway void print(in long x);          }      </description>     </interface>   </requiredInterfaces>

  16. COTStrader: Exporting Functional information : serviceAccessProtocol. <serviceAccessProtocol>   <description notation="pi-protocols"> OnePlaceBuffer(ref,out) = ref?write(x,rep).out!print(x). rep!().Full(ref,out,x);    Full(ref,out,x)=ref?read(rep).rep!(x).OnePlaceBuffer(ref,out);  </description>   <exactMatching href="http://liribarn.ual.es:8080/servlet/PI.exactMatching"/>   <softMatching href="http://liribarn.ual.es:8080/servlet/PI.softMatching"/> </serviceAccessProtocol>

  17. COTStrader: Exporting Non Functional information example: properties.   <properties notation="W3C">    <property name="securityLevel">       <type>xsd:string</type> <value>SAFE</value>    </property>     <property name="capacity">       <type>xsd:int</type> <value>1</value>    </property>     <property name="isRunningNow">       <type>xsd:bool</type><!-- dynamic property -->      <value href=“...8080/servlet/OnePlaceBuffer.running"/>     </property>     <property name="keywords">       <type>xsd:string</type> <value>storage,bounded</value>    </property>  </properties>

  18. COTStrader: Exporting Packaging/architectural information example: packaging. <packaging>    <description notation="CCM-softpkg“ href=“.../OPB/Impl_OnePlaceBuffer.csd"/> </packaging>

  19. CCM:http://www.cotstrader.com/examples/OPB/Implement_OnePlaceBuffer.csdCCM:http://www.cotstrader.com/examples/OPB/Implement_OnePlaceBuffer.csd <?xml version="1.0"?> <softpkg name="OnePlaceBuffer_services" version="1.0"> <pkgtype>CORBA Component</pkgtype> <title>OnePlaceBuffer</title> <description>A descriptor example for cotstrader.com</description> <idl id="IDL:example/OnePlaceBuffer:1.0"> <link href="http://www.cotstrader.com/samples/OPB/OnePlaceBuffer.idl"/> </idl> <implementation> <os name="Win95"/><os name="WinNT" version="4.0"/><os name="AIX"/> <processor name="x86"/><processor name="sparc"/> <runtime name="JRE" version="1.3"/> <programminglanguage name="Java"/> <code type="jar"> <fileinarchive name="services.jar"/> <entrypoint>services.OnePlaceBuffer</entrypoint> </code> <threadsafety level="instance"/> <dependency type="ORB"><name>ORBacus</name></dependency> </implementation> </softpkg>

  20. COTStrader: Exporting Marketing information example: marketing.   <marketing>    <license href="http://www.cotstrader.com/examples/OPB/license.html" />     <expirydate>05-10-2001</expirydate>     <certificate href="http://www.cotstrader.com/examples/OPB/lcard.png"/>     <vendor>      <companyname>E-Brokering corp.</companyname>      <webpage>http://www.e-B.com</webpage>      <mailto>sales@e-Brokering.com</mailto>      <address>        <zip>04120</zip>        <street>Ctra Sacramento s/n</street>        <city>Almeria</city><country>Spain</country>         <street>Campus de Teatinos</street>        <city>Málaga</city><country>Spain</country>       </address>    </vendor>    <description>A one-place buffer</description>  </marketing>

  21. COTStrader EXPORTER WEB EXPORT INTERFACE export COTS XML repository templates import WEB IMPORT INTERFACE IMPORTER

  22. COTStrader: Importing <?xml version='1.0'?><COTScomponent name="Query1"                 xmlns="http://www.cotstrader.com/COTS-XMLSchema.xsd">    <functional>     <providedInterfaces>       <interface name="OnePlaceBuffer">         <description notation="CORBA-IDL">            interface OnePlaceBuffer {               void write(in long x);               long read();            }         </description>       </interface>     </providedInterfaces>   </functional>   <properties>     <property name="securityLevel"><type>xsd:string</type></property>     <property name="isRunningNow"><type>xsd:bool</type></property>   </properties> </COTScomponent>

  23. COTStrader: Importing <COTSquery name="ClientQuery"           xmlns="http://www.cotstrader.com/COTS-XMLSchema.xsd">   <COTSdescription href="http://www.cotstrader.com/Query1.xml" />    <functionalMatching>      <interfaceMatching>        <exactMatching href="http://www.cotstrader.com/cgi-bin/exactMatch.cgi" />      </interfaceMatching>      <serviceAccessProtocolMatching> <softMatching /> </serviceAccessProtocolMatching>   </functionalMatching> ...

  24. COTStrader: Importing   <COTSquery name="ClientQuery"             xmlns="http://www.cotstrader.com/COTS-XMLSchema.xsd"> . . .    <propertyMatching><constraints notation="XQuery"> (securityLevel = SAFE) and (isRunningNow = TRUE) </constraints><preferences notation="ODP">firts</preferences>   </propertyMatching>    <packagingMatching notation="XQuery">description/notation = "CCM-softpkg" and( description/implementation/os/name = "WinNT" or  description/implementation/os/name = "Solaris" )   </packagingMatching>    <marketingMatching notation="XQuery">vendor/address/country = "Spain"   </marketingMatching>   </COTSquery>

  25. £ S COTStrader Functional: Two kinds of matchings:ExactSoft Properties, packaging and marketing: Constraints and preferences, XQuery (W3C) Constraints : >, <, >=, <=, =, !=, not, and, or. Preferences : first, random, min(expr), max(expr)

  26. Soft/exact matching Apache/Server Tomcat/Servlets export COTS XML repository import COTStrader EXPORTER WEB EXPORT INTERFACE Query templates WEB IMPORT INTERFACE XQuery XQEngine CORBA/ORBacus IMPORTER Linux/Java

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