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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 $ */
#include "tuscany/sca/core/ComponentServiceWrapper.h"
#include "tuscany/sca/util/Exceptions.h"
#include "tuscany/sca/util/Logging.h"
#include "tuscany/sca/core/SCARuntime.h"
#include "tuscany/sca/model/CPPImplementation.h"
using namespace osoa::sca;
namespace tuscany
{
namespace sca
{
// ===================
// Static data members
// ===================
void* ComponentServiceWrapper::staticImpl = 0;
// ===========
// Constructor
// ===========
ComponentServiceWrapper::ComponentServiceWrapper(Service* target)
: ServiceWrapper(target), service(target)
{
LOGENTRY(1,"ComponentServiceWrapper::constructor");
if (target->getServiceType() != WireTarget::ComponentServiceType)
{
throw ServiceRuntimeException("ComponentServiceWrapper: target is not a component service");
}
component = target->getComponent();
interf = (CPPInterface*)target->getInterface();
remotable = interf->getRemotable();
LOGEXIT(1,"ComponentServiceWrapper::constructor");
}
// ==========
// Destructor
// ==========
ComponentServiceWrapper::~ComponentServiceWrapper()
{
LOGENTRY(1,"ComponentServiceWrapper::destructor");
LOGEXIT(1,"ComponentServiceWrapper::destructor");
}
// ======================================================================
// getImplementation: get an implementation for this scope
// ======================================================================
void* ComponentServiceWrapper::getImplementation()
{
CPPInterface::SCOPE scope = interf->getScope();
if (scope == CPPInterface::MODULE)
{
if (!staticImpl)
{
staticImpl = newImplementation();
}
return staticImpl;
}
else // (scope == CPPInterface::STATELESS)
{
return newImplementation();
}
}
// ======================================================================
// releaseImplementation: release the implementation for this scope
// ======================================================================
void ComponentServiceWrapper::releaseImplementation()
{
CPPInterface::SCOPE scope = interf->getScope();
if (scope == CPPInterface::STATELESS)
{
deleteImplementation();
}
}
// ======================================================================
// invoke: wrapper call to service with setting the component context
// ======================================================================
void ComponentServiceWrapper::invoke(Operation& operation)
{
SCARuntime* runtime = SCARuntime::getInstance();
runtime->setCurrentComponent(component);
try
{
invokeService(operation);
}
catch (...)
{
runtime->unsetCurrentComponent();
throw;
}
runtime->unsetCurrentComponent();
}
void ComponentServiceWrapper::setLibrary(Library* lib)
{
wrapperLibrary = lib;
}
// ======================================================================
// createServiceWrapper: create a wrapper for the target ComponentService
// ======================================================================
ComponentServiceWrapper* ComponentServiceWrapper::createServiceWrapper(Service* service)
{
string msg;
ComponentServiceWrapper* serviceWrapper = 0;
// -----------------------------------------------
// Get the implementation for the target component
// -----------------------------------------------
Component* targetComponent = service->getComponent();
Implementation* impl = targetComponent->getImplementation();
if (!impl)
{
msg = "Component " + targetComponent->getName() + " has no implementation defined";
throw ServiceNotFoundException(msg.c_str());
}
// TODO: This only handle CPP implementation for now
if (impl->getImplementationType() == Implementation::CPP)
{
// ----------------------------------------------------
// Get implementation dll name and wrapper factory name
// ----------------------------------------------------
string dllName = ((CPPImplementation*)impl)->getDll();
string wrapperFactoryName = ((CPPImplementation*)impl)->getHeaderStub()
+ "_" + service->getName() + "_Wrapper_Factory";
// ------------
// Load the dll
// ------------
string fullDllName = targetComponent->getModule()->getRoot() + "/" + dllName;
typedef ComponentServiceWrapper* (* WRAPPERFACTORY) (Service*);
Library* wrapperLib = new Library(fullDllName);
// -------------------------
// Locate the factory method
// -------------------------
WRAPPERFACTORY wrapperFactory = (WRAPPERFACTORY)wrapperLib->getSymbol(wrapperFactoryName);
if (!wrapperFactory)
{
LOGERROR_2(1, "ComponentServiceWrapper::createServiceWrapper: Unable to locate %s in library %s",
wrapperFactoryName.c_str(), fullDllName.c_str());
msg = "Unable to locate " + wrapperFactoryName + " in library " + fullDllName;
throw ServiceNotFoundException(msg.c_str());
}
// -------------------------------------
// Now create an instance of the wrapper
// -------------------------------------
serviceWrapper = wrapperFactory(service);
if (!serviceWrapper)
{
LOGERROR_2(1, "ComponentServiceWrapper::createServiceWrapper: Factory method %s in library %s returned null",
wrapperFactoryName.c_str(), fullDllName.c_str());
msg = "Factory method " + wrapperFactoryName + " in library " + fullDllName + " returned null";
throw ServiceNotFoundException(msg.c_str());
}
serviceWrapper->setLibrary(wrapperLib);
}
else
{
// ----------------------
// Non CPP Implementation
// ----------------------
msg = "Unsupported implementation type for service: " + service->getName();
throw ServiceNotFoundException(msg.c_str());
}
return serviceWrapper;
}
} // End namespace sca
} // End namespace tuscany
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