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modules/console: Fix db txns cmd.

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This commit is contained in:
Jason Volk 2018-09-26 14:58:53 -07:00
parent d9dc597c1c
commit 6b63d2e5af
1 changed files with 39 additions and 17 deletions
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56
modules/console.cc
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@ -2257,9 +2257,14 @@ bool
console_cmd__db__txns(opt &out, const string_view &line)
try
{
const params param{line, " ",
{
"dbname", "seqnum", "limit"
}};
const auto dbname
{
token(line, ' ', 0)
param.at("dbname")
};
if(dbname != "events")
@ -2268,39 +2273,56 @@ try
"Sorry, this command is specific to the events db for now."
};
const auto seqnum
{
lex_cast<uint64_t>(token(line, ' ', 1, "0"))
};
auto limit
{
lex_cast<size_t>(token(line, ' ', 2, "32"))
};
auto &database
{
db::database::get(dbname)
};
for_each(database, seqnum, db::seq_closure_bool{[&out, &limit]
(db::txn &txn, const uint64_t &seqnum) -> bool
const auto cur_seq
{
db::sequence(database)
};
const auto seqnum
{
param.at<int64_t>("seqnum", cur_seq)
};
const auto limit
{
param.at<int64_t>("limit", 32L)
};
// note that we decrement the sequence number here optimistically
// based on the number of possible entries in a txn. There are likely
// fewer entries in a txn thus we will be missing the latest txns or
// outputting more txns than the limit. We choose the latter here.
const auto start
{
std::max(seqnum - limit * ssize_t(database.columns.size()), 0L)
};
for_each(database, start, db::seq_closure_bool{[&out, &seqnum]
(db::txn &txn, const int64_t &_seqnum) -> bool
{
m::event::id::buf event_id;
txn.get(db::op::SET, "event_id", [&event_id]
(const db::delta &delta)
{
event_id = std::get<delta.KEY>(delta);
event_id = m::event::id
{
std::get<delta.VAL>(delta)
};
});
if(event_id)
if(!event_id)
return true;
out << std::setw(12) << std::right << seqnum << " : "
out << std::setw(12) << std::right << _seqnum << " : "
<< string_view{event_id}
<< std::endl;
return --limit;
return _seqnum <= seqnum;
}});
return true;