本文整理汇总了C++中context::get_value方法的典型用法代码示例。如果您正苦于以下问题：C++ context::get_value方法的具体用法？C++ context::get_value怎么用？C++ context::get_value使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类context的用法示例。
在下文中一共展示了context::get_value方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: execute
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:[email protected]") +
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();
}
}示例2: execute
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:[email protected]");
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:[email protected]", to_string<BSONObjBuilder*>(&b));
// call inherited method
tag_impl::execute(ctx, out, caller);
db->remove(collection, b.obj());
}
catch (...) {
ctx.leave();
throw;
}
ctx.leave();
}示例3: execute
void tag_set::execute(context &ctx, std::ostream &out,
const tag *caller) const {
string name = get_parameter(ctx, "name");
if (name.empty())
throw tag_storage_exception(
_("key name (name) is not defined"));
// obtain the current storage of current context by ugly hack
string db_ptr = ctx.get_value(string("@BDB:[email protected]") +
get_parameter(ctx, "storage"));
if (db_ptr.empty()) {
string id = get_parameter(ctx, "storage");
if (id.empty()) {
id = _("(default)");
}
throw tag_set_exception(
(format(_("storage (id='{0}') is not defined in the current context")) %
id).str());
}
bdb_database *db = (bdb_database*)from_string<void*>(db_ptr);
// cache protected output
ostringstream s(ostringstream::out | ostringstream::binary);
// call inherited method
tag_impl::execute(ctx, s, caller);
// set the data
db->set(name, s.str());
}示例4: execute
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:[email protected]") + 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:[email protected]") + get_parameter(ctx, "id"),
to_string<sqlite3*>(c->get_ptr()));
tag_impl::execute(ctx, out, caller);
ctx.leave();
}
catch (...) {
ctx.leave();
throw;
}
}示例5: execute
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:[email protected]");
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;
}
}