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// file : mod/database-module.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <mod/database-module.hxx>
#include <odb/database.hxx>
#include <odb/exceptions.hxx>
#include <odb/transaction.hxx>
#include <libbrep/build-package.hxx>
#include <libbrep/build-package-odb.hxx>
#include <mod/utility.hxx> // sleep_before_retry()
#include <mod/database.hxx>
#include <mod/module-options.hxx>
namespace brep
{
using namespace odb::core;
// While currently the user-defined copy constructor is not required (we
// don't need to deep copy nullptr's), it is a good idea to keep the
// placeholder ready for less trivial cases.
//
database_module::
database_module (const database_module& r)
: handler (r),
retry_ (r.retry_),
retry_max_ (r.retry_max_),
package_db_ (r.initialized_ ? r.package_db_ : nullptr),
build_db_ (r.initialized_ ? r.build_db_ : nullptr)
{
}
void database_module::
init (const options::package_db& o, size_t retry_max)
{
package_db_ = shared_database (o.package_db_user (),
o.package_db_role (),
o.package_db_password (),
o.package_db_name (),
o.package_db_host (),
o.package_db_port (),
o.package_db_max_connections ());
retry_max_ = retry_max_ < retry_max ? retry_max : retry_max_;
retry_ = 0;
}
void database_module::
init (const options::build_db& o, size_t retry_max)
{
build_db_ = shared_database (o.build_db_user (),
o.build_db_role (),
o.build_db_password (),
o.build_db_name (),
o.build_db_host (),
o.build_db_port (),
o.build_db_max_connections ());
retry_max_ = retry_max_ < retry_max ? retry_max : retry_max_;
retry_ = 0;
}
bool database_module::
handle (request& rq, response& rs, log& l)
try
{
return handler::handle (rq, rs, l);
}
catch (const odb::recoverable& e)
{
if (retry_ != retry_max_)
{
HANDLER_DIAG;
l1 ([&]{trace << e << "; " << retry_max_ - retry_ << " retries left";});
sleep_before_retry (retry_++);
throw retry ();
}
throw;
}
optional<string> database_module::
update_tenant_service_state (
const connection_ptr& conn,
const string& type,
const string& id,
const function<optional<string> (const string& tenant_id,
const tenant_service&)>& f)
{
assert (f != nullptr); // Shouldn't be called otherwise.
// Must be initialized via the init(options::build_db) function call.
//
assert (build_db_ != nullptr);
optional<string> r;
update_tenant_service_state (
conn, type, id,
[&r, &f, this] (const shared_ptr<build_tenant>& t)
{
// Reset, in case this is a retry after the recoverable database
// failure.
//
r = nullopt;
if (t != nullptr)
{
assert (t->service); // Shouldn't be here otherwise.
tenant_service& s (*t->service);
if (optional<string> data = f (t->id, s))
{
s.data = move (*data);
build_db_->update (t);
r = move (s.data);
}
}
});
return r;
}
void database_module::
update_tenant_service_state (
const connection_ptr& conn,
const string& type,
const string& id,
const function<void (const shared_ptr<build_tenant>&)>& f)
{
assert (f != nullptr); // Shouldn't be called otherwise.
// Must be initialized via the init(options::build_db) function call.
//
assert (build_db_ != nullptr);
for (size_t retry (0);;)
{
try
{
transaction tr (conn->begin ());
using query = query<build_tenant>;
shared_ptr<build_tenant> t (
build_db_->query_one<build_tenant> (query::service.id == id &&
query::service.type == type));
f (t);
tr.commit ();
// Bail out if we have successfully updated the service state.
//
break;
}
catch (const odb::recoverable& e)
{
HANDLER_DIAG;
// If no more retries left, don't re-throw odb::recoverable not to
// retry at the upper level.
//
if (retry == retry_max_)
fail << e << "; no tenant service state update retries left";
l1 ([&]{trace << e << "; " << retry_max_ - retry << " tenant service "
<< "state update retries left";});
sleep_before_retry (retry++);
}
}
}
}
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