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// client.cpp
/**
* Copyright (C) 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
/* Client represents a connection to the database (the server-side) and corresponds
to an open socket (or logical connection if pooling on sockets) from a client.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/client.h"
#include <boost/functional/hash.hpp>
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/service_context.h"
#include "mongo/stdx/thread.h"
#include "mongo/util/concurrency/thread_name.h"
#include "mongo/util/exit.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
TSP_DECLARE(ServiceContext::UniqueClient, currentClient)
TSP_DEFINE(ServiceContext::UniqueClient, currentClient)
void Client::initThreadIfNotAlready(const char* desc) {
if (currentClient.getMake()->get())
return;
initThread(desc);
}
void Client::initThreadIfNotAlready() {
initThreadIfNotAlready(getThreadName().c_str());
}
void Client::initThread(const char* desc, AbstractMessagingPort* mp) {
initThread(desc, getGlobalServiceContext(), mp);
}
void Client::initThread(const char* desc, ServiceContext* service, AbstractMessagingPort* mp) {
invariant(currentClient.getMake()->get() == nullptr);
std::string fullDesc;
if (mp != NULL) {
fullDesc = str::stream() << desc << mp->connectionId();
} else {
fullDesc = desc;
}
setThreadName(fullDesc.c_str());
// Create the client obj, attach to thread
*currentClient.get() = service->makeClient(fullDesc, mp);
}
void Client::destroy() {
invariant(currentClient.get());
invariant(currentClient.get()->get());
currentClient.reset(nullptr);
}
namespace {
int64_t generateSeed(const std::string& desc) {
size_t seed = 0;
boost::hash_combine(seed, Date_t::now().asInt64());
boost::hash_combine(seed, desc);
return seed;
}
} // namespace
Client::Client(std::string desc, ServiceContext* serviceContext, AbstractMessagingPort* p)
: ClientBasic(serviceContext, p),
_desc(std::move(desc)),
_threadId(stdx::this_thread::get_id()),
_connectionId(p ? p->connectionId() : 0),
_prng(generateSeed(_desc)) {}
void Client::reportState(BSONObjBuilder& builder) {
builder.append("desc", desc());
std::stringstream ss;
ss << _threadId;
builder.append("threadId", ss.str());
if (_connectionId) {
builder.appendNumber("connectionId", _connectionId);
}
if (hasRemote()) {
builder.append("client", getRemote().toString());
}
}
ServiceContext::UniqueOperationContext Client::makeOperationContext() {
return getServiceContext()->makeOperationContext(this);
}
void Client::setOperationContext(OperationContext* txn) {
// We can only set the OperationContext once before resetting it.
invariant(txn != NULL && _txn == NULL);
_txn = txn;
}
void Client::resetOperationContext() {
invariant(_txn != NULL);
_txn = NULL;
}
std::string Client::clientAddress(bool includePort) const {
if (!hasRemote()) {
return "";
}
if (includePort) {
return getRemote().toString();
}
return getRemote().host();
}
ClientBasic* ClientBasic::getCurrent() {
return currentClient.getMake()->get();
}
Client& cc() {
Client* c = currentClient.getMake()->get();
verify(c);
return *c;
}
bool haveClient() {
return currentClient.getMake()->get();
}
} // namespace mongo
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