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BoccaSimpleExample
Presuming you have a bocca 0.3 installed and in path, here's a simple example.
bocca create project myproj cd myproj ./configure ; # generates utility scripts important when testing bocca create port myport bocca create component mycomponent --uses=myport:out --provides:myport:in This creates a component with two ports (named "in" and "out") of the same type myport (full SIDL type name is myproj.myport). It uses the default language c++. To specify using another language, add the --language="LANG" option to create component; LANG is one of "c,cxx,f77,f90,python,java". To put some brains in the system we need to add a method to the port: bocca edit myport brings up the editor with the myport sidl file. The sidl file actually resides somewhere in the project source tree (myproj/ports/sidl/myproj.myport.sidl) that we don't want to remember. (If there's a problem starting the editor, see BoccaEdit for hints.) Add method: double doSomething(in double x); in the block of the sidl file surrounded by: // DO-NOT-DELETE bocca.splicer.begin(myproj.myport.methods) ... // DO-NOT-DELETE bocca.splicer.end(myproj.myport.methods) Now we need to implement doSomething in the component. bocca edit -i mycomponent brings up the editor with the component impl (implementation) file in c++. here you will find (if you search): // DO-NOT-DELETE splicer.begin(myproj.mycomponent.doSomething) // Insert-Code-Here {myproj.mycomponent.doSomething} (doSomething method) // DO-DELETE-WHEN-IMPLEMENTING exception.begin() /* * This method has not been implemented */ sidl NotImplementedException ex = sidl NotImplementedException::_create();ex.setNote("This method has not been implemented"); ex.add(FILE, LINE, "doSomething"); throw ex; // DO-DELETE-WHEN-IMPLEMENTING exception.end() // DO-NOT-DELETE splicer.end(myproj.mycomponent.doSomething) Replace the block contents with some code: // DO-NOT-DELETE splicer.begin(myproj.mycomponent.doSomething) return x*x; // DO-NOT-DELETE splicer.end(myproj.mycomponent.doSomething) and then type 'make' again and you have a working component! To prove the component is working, type 'make check'. To prove the component is working with a gui, type 'make testgui'. Please note that the ccafe-gui freezing up after loading some but not all components is a known bug and has nothing to do with your component. Created by: baallan last modification: Friday 28 of September, 2007 [15:37:59 UTC] by baallan |
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