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* Some wrapper objects to ensure that SQLite objects are properly 

destroyed.
This commit is contained in:
Eelco Dolstra 2010-02-18 14:30:42 +00:00
parent a053d2d8e5
commit e0305bb7a8
2 changed files with 109 additions and 49 deletions
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118
src/libstore/local-store.cc
View File

@ -18,6 +18,8 @@
#include <errno.h>
#include <stdio.h>
#include <sqlite3.h>
namespace nix {
@ -32,6 +34,37 @@ public:
};
SQLite::~SQLite()
{
try {
if (db && sqlite3_close(db) != SQLITE_OK)
throw SQLiteError(db, "closing database");
} catch (...) {
ignoreException();
}
}
void SQLiteStmt::create(sqlite3 * db, const string & s)
{
assert(!stmt);
if (sqlite3_prepare_v2(db, s.c_str(), -1, &stmt, 0) != SQLITE_OK)
throw SQLiteError(db, "creating statement");
this->db = db;
}
SQLiteStmt::~SQLiteStmt()
{
try {
if (stmt && sqlite3_finalize(stmt) != SQLITE_OK)
throw SQLiteError(db, "finalizing statement");
} catch (...) {
ignoreException();
}
}
void checkStoreNotSymlink()
{
if (getEnv("NIX_IGNORE_SYMLINK_STORE") == "1") return;
@ -52,7 +85,6 @@ void checkStoreNotSymlink()
LocalStore::LocalStore()
{
db = 0;
substitutablePathsLoaded = false;
schemaPath = nixDBPath + "/schema";
@ -73,6 +105,8 @@ LocalStore::LocalStore()
checkStoreNotSymlink();
/* Acquire the big fat lock in shared mode to make sure that no
schema upgrade is in progress. */
try {
Path globalLockPath = nixDBPath + "/big-lock";
globalLock = openLockFile(globalLockPath.c_str(), true);
@ -86,22 +120,34 @@ LocalStore::LocalStore()
printMsg(lvlError, "waiting for the big Nix store lock...");
lockFile(globalLock, ltRead, true);
}
/* Open the Nix database. */
if (sqlite3_open_v2((nixDBPath + "/db.sqlite").c_str(), &db.db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0) != SQLITE_OK)
throw Error("cannot open SQLite database");
if (sqlite3_busy_timeout(db, 60000) != SQLITE_OK)
throw SQLiteError(db, "setting timeout");
/* Check the current database schema and if necessary do an
upgrade. */
int curSchema = getSchema();
if (curSchema > nixSchemaVersion)
throw Error(format("current Nix store schema is version %1%, but I only support %2%")
% curSchema % nixSchemaVersion);
if (curSchema == 0) { /* new store */
curSchema = nixSchemaVersion;
curSchema = nixSchemaVersion;
initSchema();
writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
}
if (curSchema == 1) throw Error("your Nix store is no longer supported");
if (curSchema < 5)
else if (curSchema == 1) throw Error("your Nix store is no longer supported");
else if (curSchema < 5)
throw Error(
"Your Nix store has a database in Berkeley DB format,\n"
"which is no longer supported. To convert to the new format,\n"
"please upgrade Nix to version 0.12 first.");
if (curSchema < 6) upgradeStore6();
else if (curSchema < 6) upgradeStore6();
else prepareStatements();
doFsync = queryBoolSetting("fsync-metadata", false);
}
@ -112,9 +158,6 @@ LocalStore::~LocalStore()
try {
flushDelayedUpdates();
if (db && sqlite3_close(db) != SQLITE_OK)
throw SQLiteError(db, "closing database");
foreach (RunningSubstituters::iterator, i, runningSubstituters) {
i->second.to.close();
i->second.from.close();
@ -143,15 +186,19 @@ int LocalStore::getSchema()
void LocalStore::initSchema()
{
if (sqlite3_open_v2((nixDBPath + "/db.sqlite").c_str(), &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0) != SQLITE_OK)
throw Error("cannot open SQLite database");
if (sqlite3_busy_timeout(db, 60000) != SQLITE_OK)
throw SQLiteError(db, "sett");
if (sqlite3_exec(db, (const char *) schema, 0, 0, 0) != SQLITE_OK)
throw SQLiteError(db, "initialising database schema");
prepareStatements();
}
void LocalStore::prepareStatements()
{
stmtRegisterValidPath.create(db,
"insert into ValidPaths (path, hash, registrationTime, deriver) values (?, ?, ?, ?);");
stmtAddReference.create(db,
"insert into Refs (referrer, reference) values (?, ?);");
}
@ -1220,33 +1267,28 @@ void LocalStore::upgradeStore6()
if (sqlite3_exec(db, "begin;", 0, 0, 0) != SQLITE_OK)
throw SQLiteError(db, "running `begin' command");
sqlite3_stmt * registerStmt;
if (sqlite3_prepare_v2(db, "insert into ValidPaths (path, hash, registrationTime, deriver) values (?, ?, ?, ?);",
-1, &registerStmt, 0) != SQLITE_OK)
throw SQLiteError(db, "creating statement");
std::map<Path, sqlite3_int64> pathToId;
foreach (PathSet::iterator, i, validPaths) {
ValidPathInfo info = queryPathInfo(*i, true);
if (sqlite3_reset(registerStmt) != SQLITE_OK)
if (sqlite3_reset(stmtRegisterValidPath) != SQLITE_OK)
throw SQLiteError(db, "resetting statement");
if (sqlite3_bind_text(registerStmt, 1, i->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
if (sqlite3_bind_text(stmtRegisterValidPath, 1, i->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 1");
string h = "sha256:" + printHash(info.hash);
if (sqlite3_bind_text(registerStmt, 2, h.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
if (sqlite3_bind_text(stmtRegisterValidPath, 2, h.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 2");
if (sqlite3_bind_int(registerStmt, 3, info.registrationTime) != SQLITE_OK)
if (sqlite3_bind_int(stmtRegisterValidPath, 3, info.registrationTime) != SQLITE_OK)
throw SQLiteError(db, "binding argument 3");
if (info.deriver != "") {
if (sqlite3_bind_text(registerStmt, 4, info.deriver.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
if (sqlite3_bind_text(stmtRegisterValidPath, 4, info.deriver.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
throw SQLiteError(db, "binding argument 4");
} else {
if (sqlite3_bind_null(registerStmt, 4) != SQLITE_OK)
if (sqlite3_bind_null(stmtRegisterValidPath, 4) != SQLITE_OK)
throw SQLiteError(db, "binding argument 4");
}
if (sqlite3_step(registerStmt) != SQLITE_DONE)
if (sqlite3_step(stmtRegisterValidPath) != SQLITE_DONE)
throw SQLiteError(db, "registering valid path in database");
pathToId[*i] = sqlite3_last_insert_rowid(db);
@ -1254,29 +1296,21 @@ void LocalStore::upgradeStore6()
std::cerr << ".";
}
if (sqlite3_finalize(registerStmt) != SQLITE_OK)
throw SQLiteError(db, "finalizing statement");
std::cerr << "|";
sqlite3_stmt * addRefStmt;
if (sqlite3_prepare_v2(db, "insert into Refs (referrer, reference) values (?, ?);",
-1, &addRefStmt, 0) != SQLITE_OK)
throw SQLiteError(db, "creating statement");
foreach (PathSet::iterator, i, validPaths) {
ValidPathInfo info = queryPathInfo(*i, true);
foreach (PathSet::iterator, j, info.references) {
if (sqlite3_reset(addRefStmt) != SQLITE_OK)
if (sqlite3_reset(stmtAddReference) != SQLITE_OK)
throw SQLiteError(db, "resetting statement");
if (sqlite3_bind_int(addRefStmt, 1, pathToId[*i]) != SQLITE_OK)
if (sqlite3_bind_int(stmtAddReference, 1, pathToId[*i]) != SQLITE_OK)
throw SQLiteError(db, "binding argument 1");
if (pathToId.find(*j) == pathToId.end())
throw Error(format("path `%1%' referenced by `%2%' is invalid") % *j % *i);
if (sqlite3_bind_int(addRefStmt, 2, pathToId[*j]) != SQLITE_OK)
if (sqlite3_bind_int(stmtAddReference, 2, pathToId[*j]) != SQLITE_OK)
throw SQLiteError(db, "binding argument 2");
if (sqlite3_step(addRefStmt) != SQLITE_DONE)
if (sqlite3_step(stmtAddReference) != SQLITE_DONE)
throw SQLiteError(db, "adding reference to database");
}
@ -1287,12 +1321,6 @@ void LocalStore::upgradeStore6()
if (sqlite3_exec(db, "commit;", 0, 0, 0) != SQLITE_OK)
throw SQLiteError(db, "running `commit' command");
if (sqlite3_finalize(addRefStmt) != SQLITE_OK)
throw SQLiteError(db, "finalizing statement");
throw Error("foo");
writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
lockFile(globalLock, ltRead, true);

40
src/libstore/local-store.hh
View File

@ -6,7 +6,9 @@
#include "store-api.hh"
#include "util.hh"
#include <sqlite3.h>
class sqlite3;
class sqlite3_stmt;
namespace nix {
@ -14,8 +16,9 @@ namespace nix {
/* Nix store and database schema version. Version 1 (or 0) was Nix <=
0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
Version 4 is Nix 0.11. Version 5 is Nix 0.12*/
const int nixSchemaVersion = 5;
Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.14. Version 6 is
Nix 0.15. */
const int nixSchemaVersion = 6;
extern string drvsLogDir;
@ -43,6 +46,28 @@ struct RunningSubstituter
};
/* Wrapper object to close the SQLite database automatically. */
struct SQLite
{
sqlite3 * db;
SQLite() { db = 0; }
~SQLite();
operator sqlite3 * () { return db; }
};
/* Wrapper object to create and destroy SQLite prepared statements. */
struct SQLiteStmt
{
sqlite3 * db;
sqlite3_stmt * stmt;
SQLiteStmt() { stmt = 0; }
void create(sqlite3 * db, const string & s);
~SQLiteStmt();
operator sqlite3_stmt * () { return stmt; }
};
class LocalStore : public StoreAPI
{
private:
@ -163,12 +188,19 @@ private:
/* Whether to do an fsync() after writing Nix metadata. */
bool doFsync;
sqlite3 * db;
/* The SQLite database object. */
SQLite db;
/* Some precompiled SQLite statements. */
SQLiteStmt stmtRegisterValidPath;
SQLiteStmt stmtAddReference;
int getSchema();
void initSchema();
void prepareStatements();
void registerValidPath(const ValidPathInfo & info, bool ignoreValidity = false);
ValidPathInfo queryPathInfo(const Path & path, bool ignoreErrors = false);