DistributeMe In 7 Slides

A very brief introduction on DistributeMe

Transcript

1. DistributeMe
   in 7 Slides and a Sentence
   by Leon Rosenberg
   anotheria.net 2009-2010
   Freitag, 12. April 13
   

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2. What is DistributeMe
   ‣ DistributeMe is the compile- and run-time utility
   for distributing java programs via interfaces.
   Freitag, 12. April 13
   

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3. In a Monolith
   Service Interface
   Service Implementation
   Client
   knows, uses
   implements
   Service Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   calls
   Freitag, 12. April 13
   

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4. Distributed
   Service Interface
   Service Implementation
   Client
   knows, uses
   implements
   Service Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   Service Stub
   implements
   Service Skeleton
   knows, uses
   Stub Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   calls calls
   calls
   Freitag, 12. April 13
   

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5. ClientVM ServerVM
   Deployed
   Service Interface
   Service Implementation
   Client
   knows, uses
   implements
   Service Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   Service Stub
   implements
   Service Skeleton
   knows, uses
   Stub Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   calls via rmi calls
   calls
   Freitag, 12. April 13
   

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6. Code Authoring
   Service Interface
   Service Implementation
   Client
   knows, uses
   implements
   Service Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   Service Stub
   implements
   Service Skeleton
   knows, uses
   Stub Factory
   creates
   uses, directly
   or indirectly,
   via DI or
   MetaFactory
   calls calls
   calls
   code written
   by developer
   code written
   by developer
   generated
   code
   Freitag, 12. April 13
   

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7. ClientVM
   ClientVM
   Complete
   Server alpha VM
   Service1 Impl
   Client A
   Service1 Factory
   creates
   uses
   Service1 Stub
   Service1 Skeleton
   Stub1 Factory
   creates
   uses
   calls via rmi calls
   calls
   Client B Service2 Stub
   Stub2 Factory
   creates
   uses
   calls
   Client C Service1 Stub
   Stub1 Factory
   creates
   uses
   calls
   Server beta VM
   Service2 Impl
   Service2 Factory
   creates
   uses
   Service2 Skeleton
   calls
   Registry VM
   RegistryWebApp
   calls via rmi
   calls via rmi
   uses
   lookup registry
   Freitag, 12. April 13
   

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8. Server Arch
   ApplicationServer 001
   ServiceVM A
   service 1
   ServiceVM B
   service2
   ServiceVM C
   service4
   ...
   ApplicationServer n
   service3
   ...
   ServiceVM Q
   service 11
   ServiceVM R
   service3
   service12
   ...
   RegistryServer
   RegistryTomcat VM
   registry.war
   Client 001
   ClientTomcat VM
   ClientA.war
   Client 025
   ClientTomcat VM
   ClientB.war
   Client 076
   Client VM
   ClientC.jar
   Client 123
   Client VM
   ClientD.jar
   Client VM
   ClientE.jar
   ...
   ... ...
   C l i e n t S i d e S e r v e r S i d e
   Freitag, 12. April 13
   

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9. InCode
   @DistributeMe()
   public interface EchoService{
   long echo(long parameter) throws EchoServiceException;
   }
   Service Interface
   Service Implementation
   public class EchoServiceImpl implements EchoService{
   @Override
   public long echo(long parameter) {
   return parameter;
   }
   }
   Client
   public static void main(String a[]) throws Exception{
   EchoService service = ... omitted;
   long param = 123;
   long echo = service.echo(param);
   System.out.println(“Service replied: “+echo);
   }
   public class EchoServiceFactory {
   public EchoService create(){
   return new EchoServiceImpl();
   }
   }
   Service Factory
   package org.distributeme.test.echo; http://svn.anotheria.net/opensource/distributeme/trunk
   Freitag, 12. April 13
   

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