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impliment cursor for book_offers

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This commit is contained in:
Nathan Nichols
2021-04-26 15:35:29 -05:00
parent 0bcf3a4601
commit 3c8ecc01f1
2 changed files with 32 additions and 12 deletions
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5
handlers/BookOffers.cpp
View File

@@ -266,8 +266,11 @@ doBookOffers(
ripple::uint256 bookBase = getBookBase(book);
auto start = std::chrono::system_clock::now();
std::cout << "getting Book Offers" << std::endl;
auto [offers, retCursor] =
backend.fetchBookOffers(bookBase, *ledgerSequence, limit, cursor);
std::cout << "got Book Offers" << std::endl;
auto end = std::chrono::system_clock::now();
BOOST_LOG_TRIVIAL(warning) << "Time loading books from Postgres: "
@@ -281,7 +284,7 @@ doBookOffers(
std::move_iterator(offers.begin()),
std::move_iterator(offers.end()),
std::back_inserter(jsonOffers),
[](auto obj) {
[](auto&& obj) {
try
{
ripple::SerialIter it{obj.blob.data(), obj.blob.size()};

39
reporting/CassandraBackend.cpp
View File

@@ -666,14 +666,26 @@ CassandraBackend::fetchBookOffers(
BOOST_LOG_TRIVIAL(info) << __func__ << " upper = " << std::to_string(upper)
<< " book = " << ripple::strHex(std::string((char*)book.data(), 24));
// ripple::uint256 zero = {};
// statement.bindBytes(zero.data(), 8);
// if (cursor)
// statement.bindBytes(*cursor);
// else
// {
// statement.bindBytes(zero);
// }
if (cursor)
{
auto object = fetchLedgerObject(*cursor, sequence);
if(!object)
return {{}, {}};
ripple::SerialIter it{object->data(), object->size()};
ripple::SLE offer{it, *cursor};
ripple::uint256 bookDir = offer.getFieldH256(ripple::sfBookDirectory);
statement.bindBytes(bookDir.data() + 24, 8);
statement.bindBytes(*cursor);
}
else
{
ripple::uint256 zero = beast::zero;
statement.bindBytes(zero.data(), 8);
statement.bindBytes(zero);
}
// statement.bindUInt(limit);
CassandraResult result = executeSyncRead(statement);
@@ -681,6 +693,7 @@ CassandraBackend::fetchBookOffers(
BOOST_LOG_TRIVIAL(debug) << __func__ << " - got keys";
if (!result)
{
std::cout << "could not sync read" << std::endl;
return {{}, {}};
}
@@ -694,6 +707,7 @@ CassandraBackend::fetchBookOffers(
BOOST_LOG_TRIVIAL(debug)
<< __func__ << " - populated keys. num keys = " << keys.size();
std::cout << keys.size() << std::endl;
if (!keys.size())
return {{}, {}};
@@ -701,11 +715,13 @@ CassandraBackend::fetchBookOffers(
std::vector<Blob> objs = fetchLedgerObjects(keys, sequence);
for (size_t i = 0; i < objs.size(); ++i)
{
if (results.size() == limit)
return {results, keys[i]};
if (objs[i].size() != 0)
{
if (results.size() == limit)
return {results, keys[i]};
results.push_back({keys[i], objs[i]});
}
}
return {results, {}};
@@ -1634,6 +1650,7 @@ CassandraBackend::open()
query.str("");
query << "SELECT quality_key FROM " << tablePrefix << "books2 "
<< " WHERE book = ? AND sequence = ?"
<< " AND quality_key >= (?, ?)"
" ORDER BY quality_key ASC";
if (!selectBook_.prepareStatement(query, session_.get()))
continue;