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