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#include <pch.hpp>
#include "rowSetCache.h"
#include "sqlVariableBinder.h"
#include "sqlHandleAsVariableType.h"
#include "buffer.h"
#include "selectcommand.h"
#include "modifycommand.h"
#include "column.h"
#include "commonObjects.h"
#include "rdbmsDataSource.h"
#include "logger.h"
#include "scriptLoader.h"
#include "iHaveParameters.h"
#include "rowSet.h"
#include "options.h"
#include <boost/algorithm/string/predicate.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
typedef boost::shared_ptr<DB::SelectCommand> SelectPtr;
typedef boost::shared_ptr<DB::ModifyCommand> ModifyPtr;
class SqlCache : public RowSetCache {
public:
SqlCache(ScriptNodePtr p) :
RowSetCache(p),
db(NULL)
{
}
void loadComplete(const CommonObjects * co)
{
db = co->dataSource<RdbmsDataSource>(DataSource);
}
static void appendKeyCols(AdHoc::Buffer * sql, unsigned int * off, const Glib::ustring & col)
{
if ((*off)++) {
sql->append(", ");
}
sql->append(col.c_str());
}
static void appendKeyBinds(AdHoc::Buffer * sql, unsigned int * off)
{
if ((*off)++) {
sql->append(", ");
}
sql->append("?");
}
static void appendKeyAnds(AdHoc::Buffer * sql, const Glib::ustring & col)
{
sql->appendf(" AND h.%s = ?", col.c_str());
}
static void bindKeyValues(DB::Command * cmd, unsigned int * offset, const VariableType & v)
{
boost::apply_visitor<const SqlVariableBinder, const VariableType>(SqlVariableBinder(cmd, (*offset)++), v);
}
class SqlCacheRowSet : public RowSet {
public:
SqlCacheRowSet(SelectPtr r) :
SourceObject(ScriptNodePtr()),
RowSet(NULL),
s(r) {
}
class SqlCacheRowState : public RowState {
public:
SqlCacheRowState(const SqlCacheRowSet * s) :
sc(s) {
}
const Columns & getColumns() const {
return columns;
}
RowAttribute resolveAttr(const Glib::ustring & attrName) const {
return boost::bind(&SqlCacheRowState::getAttrCol, this, "p2attr_" + attrName);
}
private:
VariableType getAttrCol(const Glib::ustring & col) const {
HandleAsVariableType h;
(*sc->s)[col].apply(h);
return h.variable;
}
mutable Columns columns;
friend class SqlCacheRowSet;
const SqlCacheRowSet * sc;
};
void execute(const Glib::ustring&, const RowProcessorCallback & rp, ExecContext * ec) const {
SqlCacheRowState ss(this);
HandleAsVariableType h;
do {
if (!(*s)["p2_cacheid"].isNull()) {
if (colCols.empty()) {
(*s)["p2_cacheid"].apply(h);
cacheId = h.variable;
unsigned int colNo = 0;
for (unsigned int c = 0; c < s->columnCount(); c++) {
const DB::Column & col = (*s)[c];
if (!boost::algorithm::starts_with(col.name, "p2attr_") &&
!boost::algorithm::starts_with(col.name, "p2_")) {
ss.columns.insert(new Column(colNo++, col.name));
colCols.push_back(c);
}
}
ss.fields.resize(colCols.size());
}
else {
(*s)["p2_cacheid"].apply(h);
if (cacheId != (int64_t)h.variable) {
break;
}
}
for (const unsigned int & c : colCols) {
const DB::Column & col = (*s)[c];
col.apply(h);
ss.fields[&c - &colCols.front()] = h.variable;
}
ss.process(ec, rp);
}
} while (s->fetch());
}
private:
SelectPtr s;
mutable std::vector<unsigned int> colCols;
mutable int64_t cacheId;
};
RowSetCPtr getCachedRowSet(ExecContext * ec, const Glib::ustring & n, const Glib::ustring & f, const IHaveParameters * ps) const
{
AdHoc::Buffer sql;
sql.appendf("SELECT r.* \
FROM %s p, %s_%s_%s h LEFT OUTER JOIN %s_%s_%s_rows r \
ON h.p2_cacheid = r.p2_cacheid \
WHERE p.p2_time > ? \
AND p.p2_cacheid = h.p2_cacheid",
HeaderTable.c_str(),
HeaderTable.c_str(), n.c_str(), f.c_str(),
HeaderTable.c_str(),n.c_str(), f.c_str());
applyKeys(ec, boost::bind(appendKeyAnds, &sql, _1), ps);
sql.appendf(" ORDER BY r.p2_cacheid DESC, r.p2_row");
auto con = db->getReadonly();
SelectPtr gh(con->newSelectCommand(sql));
unsigned int offset = 0;
gh->bindParamT(offset++, boost::posix_time::microsec_clock::universal_time() - boost::posix_time::seconds(CacheLife));
applyKeys(ec, boost::bind(bindKeyValues, gh.get(), &offset, _2), ps);
if (gh->fetch()) {
return new SqlCacheRowSet(gh);
}
return NULL;
}
class SqlCachePresenter : public RowSetPresenter {
public:
SqlCachePresenter(const Glib::ustring & name, const Glib::ustring & filter, const RdbmsDataSource * d) :
row(1),
db(d),
n(name),
f(filter) {
}
void addNewRow(const Glib::ustring &) const {
}
void addAttribute(const Glib::ustring & name, const VariableType & value) const {
attrs[name] = value;
}
void addNamedValue(const Glib::ustring & name, const VariableType & value) const {
cols[name] = value;
}
void finishRow() const {
AdHoc::Buffer sql;
sql.appendf("INSERT INTO %s_%s_%s_rows(p2_row", HeaderTable.c_str(), n.c_str(), f.c_str());
for (const Values::value_type & a : attrs) {
sql.appendf(", p2attr_%s", a.first.c_str());
}
for (const Values::value_type & v : cols) {
sql.appendf(", %s", v.first.c_str());
}
sql.appendf(") VALUES(?");
for (size_t x = attrs.size(); x > 0; x -= 1) {
sql.append(", ?");
}
for (size_t x = cols.size(); x > 0; x -= 1) {
sql.append(", ?");
}
sql.appendf(")");
auto con = db->getWritable();
ModifyPtr m(con->newModifyCommand(sql));
unsigned int offset = 0;
m->bindParamI(offset++, row++);
for (const Values::value_type & a : attrs) {
boost::apply_visitor<const SqlVariableBinder, const VariableType>(SqlVariableBinder(m.get(), offset++), a.second);
}
for (const Values::value_type & v : cols) {
boost::apply_visitor<const SqlVariableBinder, const VariableType>(SqlVariableBinder(m.get(), offset++), v.second);
}
m->execute();
cols.clear();
attrs.clear();
}
private:
mutable unsigned int row;
const RdbmsDataSource * db;
const Glib::ustring n, f;
typedef std::map<Glib::ustring, VariableType> Values;
mutable Values cols, attrs;
};
RowSetPresenterPtr openFor(ExecContext * ec, const Glib::ustring & n, const Glib::ustring & f, const IHaveParameters * ps)
{
AdHoc::Buffer sp;
sp.appendf("SAVEPOINT sp%p", this);
auto con = db->getWritable();
ModifyPtr s = ModifyPtr(con->newModifyCommand(sp));
s->execute();
// Header
AdHoc::Buffer del;
del.appendf("INSERT INTO %s(p2_time) VALUES(?)", HeaderTable.c_str());
ModifyPtr h = ModifyPtr(con->newModifyCommand(del));
h->bindParamT(0, boost::posix_time::microsec_clock::universal_time());
h->execute();
// Record set header
AdHoc::Buffer sql;
sql.appendf("INSERT INTO %s_%s_%s(", HeaderTable.c_str(), n.c_str(), f.c_str());
unsigned int offset = 0;
applyKeys(ec, boost::bind(appendKeyCols, &sql, &offset, _1), ps);
sql.appendf(") VALUES(");
offset = 0;
applyKeys(ec, boost::bind(appendKeyBinds, &sql, &offset), ps);
sql.appendf(")");
ModifyPtr m(con->newModifyCommand(sql));
offset = 0;
applyKeys(ec, boost::bind(bindKeyValues, m.get(), &offset, _2), ps);
m->execute();
return new SqlCachePresenter(n, f, db);
}
void save(ExecContext *, const Glib::ustring & , const Glib::ustring & , const IHaveParameters * )
{
AdHoc::Buffer sp;
sp.appendf("RELEASE SAVEPOINT sp%p", this);
auto con = db->getWritable();
ModifyPtr s = ModifyPtr(con->newModifyCommand(sp));
s->execute();
}
void discard(ExecContext *, const Glib::ustring & , const Glib::ustring & , const IHaveParameters * )
{
AdHoc::Buffer sp;
sp.appendf("ROLLBACK TO SAVEPOINT sp%p", this);
auto con = db->getWritable();
ModifyPtr s = ModifyPtr(con->newModifyCommand(sp));
s->execute();
}
INITOPTIONS;
private:
friend class CustomSqlCacheFactory;
const RdbmsDataSource * db;
static std::string DataSource;
static std::string HeaderTable;
static time_t CacheLife;
};
std::string SqlCache::DataSource;
std::string SqlCache::HeaderTable;
time_t SqlCache::CacheLife;
class CustomSqlCacheFactory : public RowSetCacheFactory::For<SqlCache>, public LifeCycle {
public:
void onIdle() override
{
try {
if (!SqlCache::DataSource.empty()) {
boost::intrusive_ptr<CommonObjects> co = new CommonObjects();
RdbmsDataSource * db = co->dataSource<RdbmsDataSource>(SqlCache::DataSource);
auto con = db->getWritable();
ModifyPtr m(con->newModifyCommand(stringbf("DELETE FROM %s WHERE p2_time < ?", SqlCache::HeaderTable)));
m->bindParamT(0, boost::posix_time::microsec_clock::universal_time() - boost::posix_time::seconds(SqlCache::CacheLife));
m->execute();
db->commit();
}
}
catch (...) {
Logger()->messagebf(LOG_WARNING, "Failed to purge expired caches from table %s", SqlCache::HeaderTable);
}
}
};
NAMEDPLUGIN("sqlcache", CustomSqlCacheFactory, RowSetCacheFactory);
DECLARE_OPTIONS(SqlCache, "SQL Cache options")
("cache.sql.dataSource", Options::value(&DataSource),
"The default datasource to connect to")
("cache.sql.headerTable", Options::value(&HeaderTable, "p2cache"),
"The filename to store the data in")
("cache.sql.life", Options::value(&CacheLife, 3600),
"The age of cache entries after which they are removed (seconds)")
END_OPTIONS(SqlCache)
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