Hermes: A Tutorial and Reference Manual - Researcher - IBM
Hermes: A Tutorial and Reference Manual - Researcher - IBM
Hermes: A Tutorial and Reference Manual - Researcher - IBM
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asmallchangetotheinterfaceFilter.Recallthattheadapterexportsa 362.3.Interfaces porttoitsQuitserviceaswellasaClientPutLineport: AdapterInterface:callmessage( Adapter:using(St<strong>and</strong>ard,WMExternal,Quit)definitions ClientPutLine:PutLineOut,--portfromclienttoadapter ClientGetProgram:GetProgramOut)--portfromclienttoadapter Quit:QuitOut,--porttoshutdownadapter AdapterToWindow:WriteToWindowOut,--porttowindowmanager WindowName:Charstring,--windownamefordirectingoutput GetProgram:GetProgramOut,--porttoGetProgramService<br />
GetProgramports,<strong>and</strong>theportstothefourfront-endaccessibleservices AdapterIn:inportofAdapterInterface constant(AdapterToWindow,WindowName,GetProgram)<br />
ofthewindowmanager.Itsinterfaceis: AdapterOut:outportofAdapterIn; enddefinitions Finally,thefrontendprocessmustbegiventheGetLine,PutLine,<strong>and</strong> exitffullg;<br />
FEPExternal:using(St<strong>and</strong>ard,WMExternal)definitions finit(AdapterToWindow),init(WindowName),init(GetProgram)g;<br />
window FEPInterface:callmessage( Refocus:WindowOut, Kill:WindowOut, Create:CreateOut) constant(GetLine,PutLine,GetProgram,Dispatch,Refocus,Kill, PutLine:PutLineOut, GetProgram:GetProgramOut, Dispatch:DispatchOut,--dispatchalinetotheappropriate GetLine:GetLineOut,<br />
2.4WindowSystemShell Create) FEPIn:inportofFEPInterfaceffullg; FEPOut:outportofFEPIn; enddefinitions exitffullg;<br />
process<strong>and</strong>thewindowmanager.Theoutershellissimilartotheprogram Let'sbeginwiththeoutershellofthesystem.Itsimplycreatesthefrontend Nowthattheinterfacesareallwritten,theprogramsarefairlyeasytowrite.
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