sod 1998-11-19andré ribeiro, claudia carvalho, nuno paiva rpc implementing remote procedure calls...
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
RPCRPCIMPLEMENTING REMOTE PROCEDURE IMPLEMENTING REMOTE PROCEDURE CALLSCALLS
•André RibeiroAndré Ribeiro
•Claudia CarvalhoClaudia Carvalho
•Nuno PaivaNuno Paiva
Apresentado Apresentado por:por:
Andrew D. Birrell and Bruce Jay Andrew D. Birrell and Bruce Jay NelsonNelson
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
André RibeiroAndré Ribeiro
[email protected]@cern.ch
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ConteúdoConteúdo
•INTRODUÇÃO AOS RPCINTRODUÇÃO AOS RPC
•DESCRIÇÃO DA CONCRETIZAÇÃO DESCRIÇÃO DA CONCRETIZAÇÃO
ESTUDADAESTUDADA
•CONCLUSÕESCONCLUSÕES
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
OBJECTIVOOBJECTIVOPermitir que programas chamem procedimentos Permitir que programas chamem procedimentos em outras máquinas.em outras máquinas.
Como ?Como ?•ClienteCliente
•Stub do ClienteStub do Cliente
•Pacote de Pacote de ComunicaçãoComunicação
•Stub do ServidorStub do Servidor
•ServidorServidor
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Call PacketCall Packet
Result PacketResult Packet
UserUserUserUser
stubstubRPCRPC
RuntimeRuntime
locallocal
callcall
local local
returnreturn
packpack
argumentargumenttransmittransmit
waitwait
receivereceiveunpackunpack
argumentargument
packpack
resultresult
callcall
workwork
returnreturn
unpackunpack
resultresultreceivereceive
transmittransmit
serverserverserverserver
stubstubRPCRPC
RuntimeRuntime
FUNCIONAMENTOFUNCIONAMENTO
Caller MachineCaller Machine Callee MachineCallee Machine
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
PROBLEMASPROBLEMAS
•PASSAGEM DE PARAMETROSPASSAGEM DE PARAMETROS
•BINDINGBINDING
•FALHASFALHAS
•PROTOCOLO DE COMUNICAÇÕESPROTOCOLO DE COMUNICAÇÕES
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Claudia CarvalhoClaudia Carvalho
[email protected]@hotmail.com
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Servidor disponibiliza o seu interface
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Server invoca Server Stub
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Server Stub chama Exportinterface no RPCRuntime
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Exportinterface invoca Grapevine
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
RPCRuntime grava numa tabela informação sobre o interface
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Cliente procura servidor
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Server chama user stub
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
User Stub invoca Importinterface no RPCRuntime
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
RPCRuntime procura no Grapevine o tipo de interface desejado
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Grapevine envia ao RPCRuntime o endereço do servidor
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
User RPCRuntime envia pacote de binding ao Server RPCRuntime
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Tabela do Server RPCRuntime envia identif. único e tabela indexada
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Cliente guarda identif. e tabela indexada para posteriores chamadas
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Cliente estabelece ligação com o servidor
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Cliente faz uma chamada
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Stub empacota mensagem contendo o identificador do interface
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
User RPCRuntime transmite mensagem
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Server RPCRuntime utiliza tabela para verificar identificador
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Server Stub desempacota chamada
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ServerStubRPCRuntimeServer Stub RPCRuntime
Server executa o interface
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Efeitos deste tipo de Efeitos deste tipo de esquemaesquema
Importação de InterfaceImportação de Interface Identificador únicoIdentificador único Chamadas em procedimentos Chamadas em procedimentos
exportados pelo RPC exportados pelo RPC
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Protocolo de comunicaçõesProtocolo de comunicações
PUP byte streams; Xerox NS “Courier”PUP byte streams; Xerox NS “Courier” Desenhado para este projectoDesenhado para este projecto
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Nuno PaivaNuno Paiva
[email protected]@yahoo.com
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Enviar Chamada
Processamento
Enviar Resultado
ZZZZZ
Chamada SimplesChamada Simples
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Chamada SimplesChamada Simples
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Chamada ComplexaChamada ComplexaSend #1Send #1
Send #2Send #2
Send ACK#1Send ACK#1
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Tratamento de ExcepçõesTratamento de Excepções
Send #1Send #1
Send ERROR#1Send ERROR#1
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
Gestão de ProcessosGestão de Processos
5 Processos Idle
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
SegurançaSegurança
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
ConclusõesConclusões
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1998-11-19 André Ribeiro, Claudia Carvalho, Nuno Paiva SOD
QuestõesQuestões