void tag_database::execute(context &ctx, std::ostream &out,
const tag *caller) const {
const string &dsn = get_parameter(ctx, "dsn");
const string &database = get_parameter(ctx, "id");
if (dsn.empty()) {
throw tag_database_exception(
_("data source name (dsn) is not defined"));
}
string db_ptr = ctx.get_value(string("@SQLITE:DATABASE@") + database);
if (!db_ptr.empty()) {
tag_impl::execute(ctx, out, caller);
return;
}
ctx.enter();
try {
pool_ptr<sqlite_connection> c = database_pool::instance().acquire(dsn);
if (!c->is_open())
c->open(dsn);
// save the pointer to database for nested tags
ctx.add_value(string("@SQLITE:DATABASE@") + get_parameter(ctx, "id"),
to_string<sqlite3*>(c->get_ptr()));
tag_impl::execute(ctx, out, caller);
ctx.leave();
}
catch (...) {
ctx.leave();
throw;
}
}
void tag_delete::execute(context &ctx, std::ostream &out,
const tag *caller) const {
const string &collection = get_parameter(ctx, "collection");
if (collection.empty())
throw tag_delete_exception(
_("query collection (collection) is not defined"));
string db_ptr = ctx.get_value("@MONGODB:DATABASE@");
if (db_ptr.empty()) {
throw tag_delete_exception(
_("MongoDB database is not defined in the current context"));
}
database *db = (database*)from_string<void*>(db_ptr);
ctx.enter();
try {
BSONObjBuilder b;
ctx.add_value("@MONGODB:PARAM@", to_string<BSONObjBuilder*>(&b));
// call inherited method
tag_impl::execute(ctx, out, caller);
db->remove(collection, b.obj());
}
catch (...) {
ctx.leave();
throw;
}
ctx.leave();
}
void tag_query::execute(context &ctx, std::ostream &out,
const tag *caller) const {
// obtain the current database of current context
string db_ptr = ctx.get_value(string("@ODBC:DATABASE@") +
get_parameter(ctx, "database"));
if (db_ptr.empty()) {
string id = get_parameter(ctx, "database");
if (id.empty()) {
id = _("(default)");
}
throw tag_query_exception(
(format(_("database (id='{0}') is not defined in the current "
"context")) % id).str());
}
connection *db = (connection*)from_string<void*>(db_ptr);
// intitialize the query
query q(*db);
query::parameters &p = q.prepare(get_parameter(ctx, "statement"));
// process parameters
vector<string> params = tokenize()(get_parameter(ctx, "parameters"));
vector<string>::const_iterator j = params.begin();
for (query::parameters::iterator i = p.begin(); i != p.end(); ++i) {
if (i->name.empty()) {
// initialize unnamed parameter
if (j != params.end()) {
i->value = *j;
++j;
}
} else {
// initialize named parameter
i->value = ctx.get_value(i->name);
}
}
// execute the query
const query::fields &f = q.execute();
// for each row execute the subnodes
while (q.next()) {
ctx.enter();
try {
for (query::fields::const_iterator i = f.begin(); i != f.end(); ++i) {
ctx.add_value(i->name, i->get_value());
}
// call inherited method
tag_impl::execute(ctx, out, caller);
}
catch (...) {
ctx.leave();
throw;
}
ctx.leave();
}
}
void tag_usr::execute(context &ctx, std::ostream &out, const tag *caller) const {
// create new context layer
ctx.enter();
try {
for (parameters::const_iterator i = params.begin();
i != params.end(); ++i) {
// create and initialize the variable from parameter
ostringstream s;
(i->second)->execute(ctx, s, this);
ctx.add_value(i->first, s.str());
}
tag* t = user_tag;
if (!t) {
tag *p = parent;
while (p && !(t = p->get_child("@" + name))) {
p = p->get_parent();
}
if (!t)
throw tag_exception(
(format(_("custom tag '{0}' is not defined at this scope")) % name).str());
}
// execute custom tag
ctx.push(this);
try {
static_cast<tag_tag*>(t)->execute(ctx, out, this);
} catch (...) {
ctx.pop();
throw;
}
ctx.pop();
}
catch (...) {
// free context layer created
ctx.leave();
throw;
}
// free context layer created
ctx.leave();
}
void tag_var::execute(context &ctx, std::ostream &out, const tag *caller) const {
// create new context layer
ctx.enter();
try {
// create and initialize the variable
strings vars = tokenize()(get_parameter(ctx, "name"));
for (strings::const_iterator i = vars.begin();
i < vars.end(); ++i) {
string p_type = get_parameter(ctx, "type");
ctx.add_value(*i, get_parameter(ctx, "value"),
p_type.empty() ? "local" : p_type);
}
// call inherited method
tag_impl::execute(ctx, out, caller);
}
catch (...) {
// free context layer created
ctx.leave();
throw;
}
// free context layer created
ctx.leave();
}
void tag_task::execute(context &ctx, std::ostream &out,
const tag *caller) const {
const string &function = get_parameter(ctx, "function");
string server_ptr = ctx.get_value("@GEARMAN:server@");
if (server_ptr.empty())
throw tag_task_exception(
_("gearman server is not defined in the current "
"context"));
server *gm = (server*)from_string<void*>(server_ptr);
ctx.enter();
try {
// cache protected output
ostringstream s(ostringstream::out | ostringstream::binary);
// call inherited method
tag_impl::execute(ctx, s, caller);
gm->add_task(function, s.str());
ctx.leave();
}
catch (...) {
ctx.leave();
throw;
}
}
void tag_query::execute(context &ctx, std::ostream &out,
const tag *caller) const {
// obtain the current database of current context
string db_ptr = ctx.get_value(string("@PGSQL:DATABASE@") +
get_parameter(ctx, "database"));
if (db_ptr.empty()) {
string id = get_parameter(ctx, "database");
if (id.empty()) {
id = _("(default)");
}
throw tag_query_exception(
(format(_("database (id='{0}') is not defined in the current "
"context")) % id).str());
}
pqxx::connection *conn = (pqxx::connection*)from_string<void*>(db_ptr);
bool need_to_free = false;
pqxx::work *work;
pqxx::result r;
string work_ptr = ctx.get_value(string("@PGSQL:WORK@"));
if (!work_ptr.empty()) {
work = (pqxx::work*)from_string<void*>(work_ptr);
} else {
try {
need_to_free = true;
work = new pqxx::work(*conn);
} catch(const std::exception &e) {
throw tag_query_exception(e.what());
}
}
try {
string self_ptr = to_string<const tag_query*>(this);
string statement;
strings params;
parse(get_parameter(ctx, "statement"), statement, params);
conn->unprepare(self_ptr);
conn->prepare(self_ptr, statement);
pqxx::prepare::invocation q = work->prepared(self_ptr);
strings passed_params = tokenize()(get_parameter(ctx, "parameters"));
strings::const_iterator j = passed_params.begin();
for (strings::const_iterator i = params.begin(); i != params.end(); ++i) {
if (i->empty()) {
q(*j);
++j;
} else {
string value = ctx.get_value(*i);
if (value.empty())
q();
else
q(value);
}
}
r = q.exec();
if (need_to_free) {
work->commit();
delete work;
}
} catch(const std::exception &e) {
if (need_to_free) {
work->abort();
delete work;
}
throw tag_query_exception(e.what());
}
for (pqxx::result::const_iterator row = r.begin(); row != r.end(); ++row) {
ctx.enter();
try {
for (pqxx::result::tuple::const_iterator field = row->begin(); field != row->end(); ++field) {
if (field.type() == 16) { // boolean
try {
if (field.as<bool>())
ctx.add_value(field.name(), "1");
else
ctx.add_value(field.name(), "0");
} catch(...) {
ctx.add_value(field.name(), "");
}
} else
ctx.add_value(field.name(), field.c_str());
}
// call inherited method
tag_impl::execute(ctx, out, caller);
}
catch (...) {
ctx.leave();
throw;
}
ctx.leave();
}
}