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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/SCARuntime.h"
#include "tuscany/sca/core/ComponentServiceWrapper.h"
#include "tuscany/sca/util/Logging.h"
#include "tuscany/sca/util/Utils.h"
#include "tuscany/sca/util/Exceptions.h"
#include "tuscany/sca/model/System.h"
#include "tuscany/sca/model/Subsystem.h"
#include "tuscany/sca/model/ModelLoader.h"
#if defined(WIN32) || defined (_WINDOWS)
#include <windows.h>
#endif
namespace tuscany
{
namespace sca
{
/**
* Environment variable names
*/
static const char* TUSCANY_SCACPP = "TUSCANY_SCACPP";
static const char* TUSCANY_SCACPP_SYSTEM_ROOT = "TUSCANY_SCACPP_SYSTEM_ROOT";
static const char* TUSCANY_SCACPP_DEFAULT_MODULE = "TUSCANY_SCACPP_DEFAULT_MODULE";
// ==========================================================
// Initialize static class member to not pointing at anything
// ==========================================================
SCARuntime* SCARuntime::instance = 0;
string SCARuntime::systemRoot = "";
string SCARuntime::defaultModuleName = "";
// ==========================================================
// Set the system configuration root
// ==========================================================
void SCARuntime::setSystemRoot(const string& root)
{
LOGENTRY(1, "SCARuntime::");
systemRoot = root;
LOGINFO_1(3, "SCARuntime::setSystemRoot - set to %s", root.c_str());
LOGEXIT(1, "SCARuntime::setSystemRoot");
}
// ==========================================================
// Set the default ModuleComponent name
// ==========================================================
void SCARuntime::setDefaultModuleComponent(const string& moduleComponent)
{
LOGENTRY(1, "SCARuntime::setDefaultModuleComponent");
defaultModuleName = moduleComponent;
LOGINFO_1(3, "SCARuntime::setDefaultModuleComponent - set to %s", moduleComponent.c_str());
LOGEXIT(1, "SCARuntime::setDefaultModuleComponent");
}
// ===================================================================
// Constructor for the SCARuntime class. This will be a singleton that
// holds all the information about the current runtime.
// ===================================================================
SCARuntime::SCARuntime() : system(new System()), defaultModule(0)
{
LOGENTRY(1, "SCARuntime::constructor");
// Locate the SCA install root
char* root = 0;
root = getenv(TUSCANY_SCACPP);
if (root == 0)
{
string msg = TUSCANY_SCACPP;
msg += " environment variable not set";
throw SystemConfigurationException(msg.c_str());
}
else
{
SCARoot = root;
}
LOGEXIT(1, "SCARuntime::constructor");
}
// ===================================================================
// Destructor for the SCARuntime class.
// ===================================================================
SCARuntime::~SCARuntime()
{
LOGENTRY(1, "SCARuntime::destructor");
if (system)
{
delete system;
}
LOGEXIT(1, "SCARuntime::destructor");
}
// =============================================================
// Get the instance of the runtime, creates it if does not exist
// static method
// =============================================================
SCARuntime* SCARuntime::getInstance()
{
LOGENTRY(1, "SCARuntime::getInstance");
if (instance == NULL)
{
instance = new SCARuntime();
if (systemRoot == "")
{
// Load the runtime
// Get root from environment variable TUSCANY_SCACPP_SYSTEM_ROOT
char* systemRootEnv = getenv(TUSCANY_SCACPP_SYSTEM_ROOT);
if (systemRootEnv == 0)
{
string msg = TUSCANY_SCACPP_SYSTEM_ROOT;
msg += " environment variable not set";
throw SystemConfigurationException(msg.c_str());
}
systemRoot = systemRootEnv;
}
instance->load(systemRoot);
}
LOGEXIT(1, "SCARuntime::getInstance");
return instance;
}
// =============================================================
// Release the instance of the runtime.
// =============================================================
void SCARuntime::releaseInstance()
{
LOGENTRY(1, "SCARuntime::releaseInstance");
if (instance)
{
delete instance;
instance = 0;
systemRoot = "";
defaultModuleName = "";
}
LOGEXIT(1, "SCARuntime::releaseInstance");
}
// ======================================
// Load up all the details of the runtime
// ======================================
void SCARuntime::load(const string& configurationRoot)
{
LOGENTRY(1, "SCARuntime::load");
LOGINFO_1(2,"configuration root: %s", configurationRoot.c_str());
ModelLoader loader(system);
// Load details of the module
loader.load(configurationRoot);
LOGEXIT(1, "SCARuntime::load");
}
// ===================================
// Return the top of the runtime model
// ===================================
System* SCARuntime::getSystem()
{
return system;
}
// ===================================================
// setCurrentComponent: push component for this thread
// ===================================================
void SCARuntime::setCurrentComponent(Component* component)
{
#if defined(WIN32) || defined (_WINDOWS)
DWORD currentThreadId = GetCurrentThreadId();
#else
pthread_t currentThreadId = pthread_self();
#endif
COMPONENTS_MAP::iterator iter = components.find(currentThreadId);
if (iter == components.end())
{
components[currentThreadId] = COMPONENT_STACK();
iter = components.find(currentThreadId);
}
COMPONENT_STACK& compStack = iter->second;
compStack.push(component);
}
// ====================================================
// unsetCurrentComponent: pop component for this thread
// ====================================================
Component* SCARuntime::unsetCurrentComponent()
{
#if defined(WIN32) || defined (_WINDOWS)
DWORD currentThreadId = GetCurrentThreadId();
#else
pthread_t currentThreadId = pthread_self();
#endif
COMPONENTS_MAP::iterator iter = components.find(currentThreadId);
if (iter != components.end())
{
COMPONENT_STACK& compStack = iter->second;
if (compStack.size() > 0)
{
Component* component = compStack.top();
compStack.pop();
return component;
}
}
return 0;
}
// =============================================================
// getCurrentComponent: return current component for this thread
// =============================================================
Component* SCARuntime::getCurrentComponent()
{
#if defined(WIN32) || defined (_WINDOWS)
DWORD currentThreadId = GetCurrentThreadId();
#else
pthread_t currentThreadId = pthread_self();
#endif
COMPONENTS_MAP::iterator iter = components.find(currentThreadId);
if (iter == components.end())
{
components[currentThreadId] = COMPONENT_STACK();
iter = components.find(currentThreadId);
}
COMPONENT_STACK& compStack = iter->second;
if (compStack.size() > 0)
{
return compStack.top();
}
else
{
return 0;
}
}
// ===========================================
// getCurrentModule: return the current module
// ===========================================
Module* SCARuntime::getCurrentModule()
{
// ---------------------------------------------
// Get module from current component if possible
// ---------------------------------------------
Component* comp = getCurrentComponent();
if (comp != 0)
{
return comp->getModule();
}
// ----------------------
// Get the default Module
// ----------------------
string message;
if (!defaultModule)
{
// -------------------------------------------
// Get the default module from the environment
// -------------------------------------------
if (defaultModuleName == "")
{
const char* defMod = getenv(TUSCANY_SCACPP_DEFAULT_MODULE);
if (!defMod)
{
message = TUSCANY_SCACPP_DEFAULT_MODULE;
message += " environment variable not set";
throw SystemConfigurationException(message.c_str());
}
defaultModuleName = defMod;
}
string subsystemName, moduleName;
Utils::tokeniseUri(defaultModuleName, subsystemName, moduleName);
// ---------------------------
// Subsystem must be specified
// ---------------------------
Subsystem* subsystem = system->findSubsystem(subsystemName);
if (!subsystem)
{
message = "Default subsystem \'" + subsystemName + "\' not found";
throw SystemConfigurationException(message.c_str());
}
// --------------------------------------------------------------------------
// If module is not specified then get the default module for this subsystem.
// This will be the ONLY module for this subsystem
// --------------------------------------------------------------------------
if (moduleName == "")
{
defaultModule = subsystem->getDefaultModule();
if (!defaultModule)
{
message = "Default module not found for subsystem \'" + subsystemName + "\'";
throw SystemConfigurationException(message.c_str());
}
}
else
{
// -----------------------------
// get the named ModuleComponent
// -----------------------------
defaultModule = subsystem->findModuleByComponentName(moduleName);
if (!defaultModule)
{
message = "Default module \'" + moduleName + "\' not found in subsystem \'" + subsystemName +"\'";
throw SystemConfigurationException(message.c_str());
}
}
}
return defaultModule;
}
} // End namespace sca
} // End namespace tuscany
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