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NarInfoDiskCache: Handle SQLite busy errors

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This commit is contained in:
Eelco Dolstra 2017-02-28 13:44:11 +01:00
parent 80027144ae
commit 34b12bad59
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GPG key ID: 8170B4726D7198DE
1 changed files with 98 additions and 87 deletions
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185
src/libstore/nar-info-disk-cache.cc
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@ -106,25 +106,27 @@ public:
"select * from NARs where cache = ? and hashPart = ? and ((present = 0 and timestamp > ?) or (present = 1 and timestamp > ?))"); "select * from NARs where cache = ? and hashPart = ? and ((present = 0 and timestamp > ?) or (present = 1 and timestamp > ?))");
/* Periodically purge expired entries from the database. */ /* Periodically purge expired entries from the database. */
auto now = time(0); retrySQLite<void>([&]() {
auto now = time(0);
SQLiteStmt queryLastPurge(state->db, "select value from LastPurge"); SQLiteStmt queryLastPurge(state->db, "select value from LastPurge");
auto queryLastPurge_(queryLastPurge.use()); auto queryLastPurge_(queryLastPurge.use());
if (!queryLastPurge_.next() || queryLastPurge_.getInt(0) < now - purgeInterval) { if (!queryLastPurge_.next() || queryLastPurge_.getInt(0) < now - purgeInterval) {
SQLiteStmt(state->db, SQLiteStmt(state->db,
"delete from NARs where ((present = 0 and timestamp < ?) or (present = 1 and timestamp < ?))") "delete from NARs where ((present = 0 and timestamp < ?) or (present = 1 and timestamp < ?))")
.use() .use()
(now - ttlNegative) (now - ttlNegative)
(now - ttlPositive) (now - ttlPositive)
.exec(); .exec();
debug("deleted %d entries from the NAR info disk cache", sqlite3_changes(state->db)); debug("deleted %d entries from the NAR info disk cache", sqlite3_changes(state->db));
SQLiteStmt(state->db, SQLiteStmt(state->db,
"insert or replace into LastPurge(dummy, value) values ('', ?)") "insert or replace into LastPurge(dummy, value) values ('', ?)")
.use()(now).exec(); .use()(now).exec();
} }
});
} }
Cache & getCache(State & state, const std::string & uri) Cache & getCache(State & state, const std::string & uri)
@ -136,114 +138,123 @@ public:
void createCache(const std::string & uri, const Path & storeDir, bool wantMassQuery, int priority) override void createCache(const std::string & uri, const Path & storeDir, bool wantMassQuery, int priority) override
{ {
auto state(_state.lock()); retrySQLite<void>([&]() {
auto state(_state.lock());
// FIXME: race // FIXME: race
state->insertCache.use()(uri)(time(0))(storeDir)(wantMassQuery)(priority).exec(); state->insertCache.use()(uri)(time(0))(storeDir)(wantMassQuery)(priority).exec();
assert(sqlite3_changes(state->db) == 1); assert(sqlite3_changes(state->db) == 1);
state->caches[uri] = Cache{(int) sqlite3_last_insert_rowid(state->db), storeDir, wantMassQuery, priority}; state->caches[uri] = Cache{(int) sqlite3_last_insert_rowid(state->db), storeDir, wantMassQuery, priority};
});
} }
bool cacheExists(const std::string & uri, bool cacheExists(const std::string & uri,
bool & wantMassQuery, int & priority) override bool & wantMassQuery, int & priority) override
{ {
auto state(_state.lock()); return retrySQLite<bool>([&]() {
auto state(_state.lock());
auto i = state->caches.find(uri); auto i = state->caches.find(uri);
if (i == state->caches.end()) { if (i == state->caches.end()) {
auto queryCache(state->queryCache.use()(uri)); auto queryCache(state->queryCache.use()(uri));
if (!queryCache.next()) return false; if (!queryCache.next()) return false;
state->caches.emplace(uri, state->caches.emplace(uri,
Cache{(int) queryCache.getInt(0), queryCache.getStr(1), queryCache.getInt(2) != 0, (int) queryCache.getInt(3)}); Cache{(int) queryCache.getInt(0), queryCache.getStr(1), queryCache.getInt(2) != 0, (int) queryCache.getInt(3)});
} }
auto & cache(getCache(*state, uri)); auto & cache(getCache(*state, uri));
wantMassQuery = cache.wantMassQuery; wantMassQuery = cache.wantMassQuery;
priority = cache.priority; priority = cache.priority;
return true; return true;
});
} }
std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo( std::pair<Outcome, std::shared_ptr<NarInfo>> lookupNarInfo(
const std::string & uri, const std::string & hashPart) override const std::string & uri, const std::string & hashPart) override
{ {
auto state(_state.lock()); return retrySQLite<std::pair<Outcome, std::shared_ptr<NarInfo>>>(
[&]() -> std::pair<Outcome, std::shared_ptr<NarInfo>> {
auto state(_state.lock());
auto & cache(getCache(*state, uri)); auto & cache(getCache(*state, uri));
auto now = time(0); auto now = time(0);
auto queryNAR(state->queryNAR.use() auto queryNAR(state->queryNAR.use()
(cache.id) (cache.id)
(hashPart) (hashPart)
(now - ttlNegative) (now - ttlNegative)
(now - ttlPositive)); (now - ttlPositive));
if (!queryNAR.next()) if (!queryNAR.next())
return {oUnknown, 0}; return {oUnknown, 0};
if (!queryNAR.getInt(13)) if (!queryNAR.getInt(13))
return {oInvalid, 0}; return {oInvalid, 0};
auto narInfo = make_ref<NarInfo>(); auto narInfo = make_ref<NarInfo>();
auto namePart = queryNAR.getStr(2); auto namePart = queryNAR.getStr(2);
narInfo->path = cache.storeDir + "/" + narInfo->path = cache.storeDir + "/" +
hashPart + (namePart.empty() ? "" : "-" + namePart); hashPart + (namePart.empty() ? "" : "-" + namePart);
narInfo->url = queryNAR.getStr(3); narInfo->url = queryNAR.getStr(3);
narInfo->compression = queryNAR.getStr(4); narInfo->compression = queryNAR.getStr(4);
if (!queryNAR.isNull(5)) if (!queryNAR.isNull(5))
narInfo->fileHash = parseHash(queryNAR.getStr(5)); narInfo->fileHash = parseHash(queryNAR.getStr(5));
narInfo->fileSize = queryNAR.getInt(6); narInfo->fileSize = queryNAR.getInt(6);
narInfo->narHash = parseHash(queryNAR.getStr(7)); narInfo->narHash = parseHash(queryNAR.getStr(7));
narInfo->narSize = queryNAR.getInt(8); narInfo->narSize = queryNAR.getInt(8);
for (auto & r : tokenizeString<Strings>(queryNAR.getStr(9), " ")) for (auto & r : tokenizeString<Strings>(queryNAR.getStr(9), " "))
narInfo->references.insert(cache.storeDir + "/" + r); narInfo->references.insert(cache.storeDir + "/" + r);
if (!queryNAR.isNull(10)) if (!queryNAR.isNull(10))
narInfo->deriver = cache.storeDir + "/" + queryNAR.getStr(10); narInfo->deriver = cache.storeDir + "/" + queryNAR.getStr(10);
for (auto & sig : tokenizeString<Strings>(queryNAR.getStr(11), " ")) for (auto & sig : tokenizeString<Strings>(queryNAR.getStr(11), " "))
narInfo->sigs.insert(sig); narInfo->sigs.insert(sig);
return {oValid, narInfo}; return {oValid, narInfo};
});
} }
void upsertNarInfo( void upsertNarInfo(
const std::string & uri, const std::string & hashPart, const std::string & uri, const std::string & hashPart,
std::shared_ptr<ValidPathInfo> info) override std::shared_ptr<ValidPathInfo> info) override
{ {
auto state(_state.lock()); retrySQLite<void>([&]() {
auto state(_state.lock());
auto & cache(getCache(*state, uri)); auto & cache(getCache(*state, uri));
if (info) { if (info) {
auto narInfo = std::dynamic_pointer_cast<NarInfo>(info); auto narInfo = std::dynamic_pointer_cast<NarInfo>(info);
assert(hashPart == storePathToHash(info->path)); assert(hashPart == storePathToHash(info->path));
state->insertNAR.use() state->insertNAR.use()
(cache.id) (cache.id)
(hashPart) (hashPart)
(storePathToName(info->path)) (storePathToName(info->path))
(narInfo ? narInfo->url : "", narInfo != 0) (narInfo ? narInfo->url : "", narInfo != 0)
(narInfo ? narInfo->compression : "", narInfo != 0) (narInfo ? narInfo->compression : "", narInfo != 0)
(narInfo && narInfo->fileHash ? narInfo->fileHash.to_string() : "", narInfo && narInfo->fileHash) (narInfo && narInfo->fileHash ? narInfo->fileHash.to_string() : "", narInfo && narInfo->fileHash)
(narInfo ? narInfo->fileSize : 0, narInfo != 0 && narInfo->fileSize) (narInfo ? narInfo->fileSize : 0, narInfo != 0 && narInfo->fileSize)
(info->narHash.to_string()) (info->narHash.to_string())
(info->narSize) (info->narSize)
(concatStringsSep(" ", info->shortRefs())) (concatStringsSep(" ", info->shortRefs()))
(info->deriver != "" ? baseNameOf(info->deriver) : "", info->deriver != "") (info->deriver != "" ? baseNameOf(info->deriver) : "", info->deriver != "")
(concatStringsSep(" ", info->sigs)) (concatStringsSep(" ", info->sigs))
(time(0)).exec(); (time(0)).exec();
} else { } else {
state->insertMissingNAR.use() state->insertMissingNAR.use()
(cache.id) (cache.id)
(hashPart) (hashPart)
(time(0)).exec(); (time(0)).exec();
} }
});
} }
}; };