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#include "connection.h"
#include "error.h"
#include "selectcommand.h"
#include "modifycommand.h"
#include <nvpParse.h>
#include <runtimeContext.h>
#include <ucontext.h>
#include <boost/optional.hpp>
NAMEDFACTORY("mysql", MySQL::Connection, DB::ConnectionFactory);
class Opts {
public:
Opts() { port = 3306; }
typedef boost::optional<std::string> OptString;
OptString server;
OptString user;
OptString password;
OptString database;
unsigned int port;
OptString unix_socket;
OptString options;
};
const char *
operator~(const Opts::OptString & os)
{
if (os) {
return os->c_str();
}
return NULL;
}
namespace std {
template <typename T>
std::istream &
operator>>(std::istream & s, boost::optional<T> & o)
{
o = T();
return (s >> *o);
}
}
using namespace AdHoc;
NvpTarget(Opts) OptsTargetMap {
NvpValue(Opts, server),
NvpValue(Opts, user),
NvpValue(Opts, password),
NvpValue(Opts, database),
NvpValue(Opts, unix_socket),
NvpValue(Opts, port),
NvpValue(Opts, options),
};
MySQL::Connection::Connection(const std::string & str) :
txDepth(0),
rolledback(false)
{
std::stringstream i(str);
Opts o;
NvpParse::parse(i, OptsTargetMap, o);
mysql_init(&conn);
if (o.options) {
mysql_options(&conn, MYSQL_READ_DEFAULT_GROUP, ~o.options);
}
if (mysql_real_connect(&conn, ~o.server, ~o.user, ~o.password, ~o.database,
o.port, ~o.unix_socket, CLIENT_LOCAL_FILES | CLIENT_MULTI_STATEMENTS) == NULL) {
throw ConnectionError();
}
if (mysql_set_character_set(&conn, "utf8")) {
throw ConnectionError();
}
}
MySQL::Connection::~Connection()
{
mysql_close(&conn);
}
void
MySQL::Connection::finish() const
{
if (txDepth != 0) {
rollbackTx();
throw Error("Transaction still open");
}
}
int
MySQL::Connection::beginTx() const
{
if (txDepth == 0) {
if (mysql_autocommit(&conn, 0)) {
throw Error(mysql_error(&conn));
}
rolledback = false;
}
return ++txDepth;
}
int
MySQL::Connection::commitTx() const
{
if (rolledback) {
return rollbackTx();
}
if (--txDepth == 0) {
if (mysql_commit(&conn)) {
throw Error(mysql_error(&conn));
}
}
return txDepth;
}
int
MySQL::Connection::rollbackTx() const
{
if (--txDepth == 0) {
if (mysql_rollback(&conn)) {
throw Error(mysql_error(&conn));
}
}
else {
rolledback = true;
}
return txDepth;
}
bool
MySQL::Connection::inTx() const
{
return txDepth;
}
DB::BulkDeleteStyle
MySQL::Connection::bulkDeleteStyle() const
{
return DB::BulkDeleteUsingUsingAlias;
}
DB::BulkUpdateStyle
MySQL::Connection::bulkUpdateStyle() const
{
return DB::BulkUpdateUsingJoin;
}
void
MySQL::Connection::ping() const
{
if (mysql_ping(&conn)) {
throw Error(mysql_error(&conn));
}
}
DB::SelectCommand *
MySQL::Connection::newSelectCommand(const std::string & sql) const
{
return new SelectCommand(this, sql);
}
DB::ModifyCommand *
MySQL::Connection::newModifyCommand(const std::string & sql) const
{
return new ModifyCommand(this, sql);
}
namespace MySQL {
class LoadContext : public AdHoc::System::RuntimeContext {
public:
LoadContext(MYSQL * c) :
loadBuf(NULL),
loadBufLen(0),
bufOff(0),
conn(c)
{
}
static int local_infile_init(void ** ptr, const char *, void * ctx) {
*ptr = ctx;
return 0;
}
static int local_infile_read(void * obj, char * buf, unsigned int bufSize) {
LoadContext * ctx = static_cast<LoadContext *>(obj);
if (ctx->loadBufLen - ctx->bufOff == 0) {
ctx->swapContext();
if (ctx->loadBufLen - ctx->bufOff <= 0) {
// Nothing to do or error
return ctx->bufOff;
}
}
unsigned int copy = std::min(ctx->loadBufLen - ctx->bufOff, bufSize);
memcpy(buf, ctx->loadBuf + ctx->bufOff, copy);
ctx->bufOff += copy;
return copy;
}
static void local_infile_end(void *) {
}
static int local_infile_error(void *, char*, unsigned int) {
return 0;
}
void callback() override
{
loadReturn = mysql_read_query_result(conn);
}
const char * loadBuf;
unsigned int loadBufLen;
int bufOff;
MYSQL * conn;
int loadReturn;
};
}
void
MySQL::Connection::beginBulkUpload(const char * table, const char * extra) const
{
static char buf[BUFSIZ];
int len = snprintf(buf, BUFSIZ, "LOAD DATA LOCAL INFILE 'any' INTO TABLE %s %s", table, extra);
mysql_send_query(&conn, buf, len);
ctx = boost::shared_ptr<LoadContext>(new MySQL::LoadContext(&conn));
mysql_set_local_infile_handler(&conn, LoadContext::local_infile_init, LoadContext::local_infile_read,
LoadContext::local_infile_end, LoadContext::local_infile_error, ctx.get());
ctx->swapContext();
}
void
MySQL::Connection::endBulkUpload(const char * msg) const
{
ctx->loadBuf = NULL;
ctx->loadBufLen = 0;
ctx->bufOff = msg ? -1 : 0;
// switch context with empty buffer fires finished
ctx->swapContext();
// Check result
if (!msg) {
if (ctx->loadReturn) {
ctx.reset();
throw Error(mysql_error(&conn));
}
}
ctx.reset();
}
size_t
MySQL::Connection::bulkUploadData(const char * data, size_t len) const
{
ctx->loadBuf = data;
ctx->loadBufLen = len;
ctx->bufOff = 0;
// switch context to load the buffered data
ctx->swapContext();
return len;
}
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