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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/* $Rev$ $Date$ */
#ifndef tuscany_sca_cpp_cppservicewrapper_h
#define tuscany_sca_cpp_cppservicewrapper_h
#include "osoa/sca/export.h"
#include "tuscany/sca/core/ServiceWrapper.h"
#include "tuscany/sca/core/Operation.h"
#include "tuscany/sca/model/Component.h"
#include "tuscany/sca/model/Interface.h"
#include "tuscany/sca/cpp/model/CPPImplementation.h"
#include "tuscany/sca/util/Library.h"
using namespace tuscany::sca::model;
namespace tuscany
{
namespace sca
{
namespace cpp
{
/**
* Wraps the service on a component implementation.
* This abstract class is extended by generated code which provides
* the implementation of some of the methods.
* An instance of this class wraps the actual component implementation which
* has been written by a developer of an SCA application.
*/
class SCA_CPP_API CPPServiceWrapper : public ServiceWrapper
{
public:
/**
* Factory method to create a new CPPServiceWrapper for a given target
* service. This method will provide all the loading of dlls required to
* create the target component.
* @param target The service on the component for which this wrapper is to be
* created.
* @return A wrapper that references the given target.
*/
static CPPServiceWrapper* getServiceWrapper(Service* service);
/**
* Constructor.
* @param target The component service to which this wrapper refers.
*/
CPPServiceWrapper(Service* service);
/**
* Destructor.
*/
virtual ~CPPServiceWrapper();
/**
* All business method calls to the target component go through the invoke method.
* @param operation The details of the method, paramaters and return value for the
* business method to be called on the target component.
*/
virtual void invoke(Operation& operation);
/**
* Return the loaded shared library for the target component.
*/
Library* getLibrary() const { return wrapperLibrary; }
protected:
/**
* Delegated method to invoke the correct method on the target component.
* Implemented by the subtype.
*/
virtual void invokeService(Operation& operation) = 0;
/**
* Delegated method to create a new component implementation.
* Implemented by the subtype.
* @return A pointer to an instance of the component implementation class.
*/
virtual void* newImplementation() = 0;
/**
* Delegated method to delete the current instance of the component
* implementation.
* Implemented by the subtype.
*/
virtual void deleteImplementation() = 0;
/**
* Return the current instance of the component implementation.
* @return A pointer to an instance of the component implementation class.
*/
virtual void* getImplementation();
/**
* Indicates that the current instance of the component implementation
* has been finished with.
* Will call CPPServiceWrapper#deleteImplementation if the
* implementation is stateless (so that a new instance is returned
* for each call).
*/
virtual void releaseImplementation();
private:
/**
* Holds an implementation instance if the scope is set to composite.
*/
static void* staticImpl;
/**
* The component to which this wrapper refers.
*/
Component* component;
/**
* A pointer to the interface which the service exposes.
*/
Interface* interf;
/**
* The component implementation
*/
CPPImplementation* implementation;
/**
* Pointer to the loaded library which contains the component
* implementation.
*/
Library* wrapperLibrary;
/**
* Set the loaded library which contains the component
* implementation.
* @param lib The library.
*/
void setLibrary(Library* lib);
};
} // End namespace cpp
} // End namespace sca
} // End namespace tuscany
#endif // tuscany_sca_cpp_cppservicewrapper_h
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