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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/base/initializer.h"
#include <iostream>
#include "mongo/base/deinitializer_context.h"
#include "mongo/base/global_initializer.h"
#include "mongo/base/initializer_context.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/quick_exit.h"
namespace mongo {
Initializer::Initializer() {}
Initializer::~Initializer() {}
Status Initializer::executeInitializers(const InitializerContext::ArgumentVector& args,
const InitializerContext::EnvironmentMap& env) {
std::vector<std::string> sortedNodes;
Status status = _graph.topSort(&sortedNodes);
if (Status::OK() != status)
return status;
InitializerContext context(args, env);
for (size_t i = 0; i < sortedNodes.size(); ++i) {
InitializerDependencyNode* node = _graph.getInitializerNode(sortedNodes[i]);
// If already initialized then this node is a legacy initializer without re-initialization
// support.
if (node->isInitialized())
continue;
auto const& fn = node->getInitializerFunction();
if (!fn) {
return Status(ErrorCodes::InternalError,
"topSort returned a node that has no associated function: \"" +
sortedNodes[i] + '"');
}
try {
status = fn(&context);
} catch (const DBException& xcp) {
return xcp.toStatus();
}
if (Status::OK() != status)
return status;
node->setInitialized(true);
}
return Status::OK();
}
Status Initializer::executeDeinitializers() {
std::vector<std::string> sortedNodes;
Status status = _graph.topSort(&sortedNodes);
if (Status::OK() != status)
return status;
DeinitializerContext context{};
// Execute deinitialization in reverse order from initialization.
for (auto it = sortedNodes.rbegin(), end = sortedNodes.rend(); it != end; ++it) {
InitializerDependencyNode* node = _graph.getInitializerNode(*it);
auto const& fn = node->getDeinitializerFunction();
if (fn) {
try {
status = fn(&context);
} catch (const DBException& xcp) {
return xcp.toStatus();
}
if (Status::OK() != status)
return status;
node->setInitialized(false);
}
}
return Status::OK();
}
Status runGlobalInitializers(const InitializerContext::ArgumentVector& args,
const InitializerContext::EnvironmentMap& env) {
return getGlobalInitializer().executeInitializers(args, env);
}
Status runGlobalInitializers(int argc, const char* const* argv, const char* const* envp) {
InitializerContext::ArgumentVector args(argc);
std::copy(argv, argv + argc, args.begin());
InitializerContext::EnvironmentMap env;
if (envp) {
for (; *envp; ++envp) {
const char* firstEqualSign = strchr(*envp, '=');
if (!firstEqualSign) {
return Status(ErrorCodes::BadValue, "malformed environment block");
}
env[std::string(*envp, firstEqualSign)] = std::string(firstEqualSign + 1);
}
}
return runGlobalInitializers(args, env);
}
Status runGlobalDeinitializers() {
return getGlobalInitializer().executeDeinitializers();
}
void runGlobalInitializersOrDie(int argc, const char* const* argv, const char* const* envp) {
Status status = runGlobalInitializers(argc, argv, envp);
if (!status.isOK()) {
std::cerr << "Failed global initialization: " << status << std::endl;
quickExit(1);
}
}
} // namespace mongo
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