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/*
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed 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: 2005/12/22 11:33:21 $ */
#ifndef tuscany_sca_core_componentservicewrapper_h
#define tuscany_sca_core_componentservicewrapper_h
#include "osoa/sca/export.h"
#include "tuscany/sca/core/ServiceWrapper.h"
#include "tuscany/sca/model/Component.h"
#include "tuscany/sca/core/Operation.h"
#include "tuscany/sca/model/CPPInterface.h"
#include "tuscany/sca/util/Library.h"
using namespace tuscany::sca::model;
namespace tuscany
{
namespace sca
{
/**
* 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 ComponentServiceWrapper : public ServiceWrapper
{
public:
/**
* Factory method to create a new ComponentServiceWrapper 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 SCA_API ComponentServiceWrapper* createServiceWrapper(Service* target);
/**
* Constructor.
* @param target The component service to which this wrapper refers.
*/
SCA_API ComponentServiceWrapper(Service* target);
/**
* Destructor.
*/
SCA_API virtual ~ComponentServiceWrapper();
/**
* 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.
*/
SCA_API virtual void invoke(Operation& operation);
/**
* Return the loaded shared library for the target component.
*/
Library* getLibrary() {return wrapperLibrary;}
protected:
/**
* Delegated method to invoke the correct method on the target component.
* Implemented by the subtype.
*/
SCA_API 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.
*/
SCA_API virtual void* newImplementation() = 0;
/**
* Delegated method to delete the current instance of the component
* implementation.
* Implemented by the subtype.
*/
SCA_API virtual void deleteImplementation() = 0;
/**
* Return the current instance of the component implementation.
* @return A pointer to an instance of the component implementation class.
*/
SCA_API virtual void* getImplementation();
/**
* Indicates that the current instance of the component implementation
* has been finished with.
* Will call ComponentServiceWrapper#deleteImplementation if the
* implementation is stateless (so that a new instance is returned
* for each call).
*/
SCA_API virtual void releaseImplementation();
private:
/**
* Holds an implementation instance if the scope is set to module.
*/
static void* staticImpl;
/**
* The component to which this wrapper refers.
*/
Component* component;
/**
* The service on the component to which this wrapper refers.
*/
Service* service;
/**
* A pointer to the interface which the service exposes.
*/
CPPInterface* interf;
/**
* Set to true if the service is remotable.
*/
bool remotable;
/**
* 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 sca
} // End namespace tuscany
#endif // tuscany_sca_core_componentservicewrapper_h
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