int rc;
const char *tail;
- rc = sqlite3_prepare(db, sql, strlen(sql), &stmt, &tail);
+ rc = sqlite3_prepare_v2(db, sql, strlen(sql), &stmt, &tail);
if (rc != SQLITE_OK) {
+ ReportError(rc);
throw IOException(string("Error preparing statement: ") + sql);
}
return stmt;
}
+void LocalDb::ReportError(int rc)
+{
+ fprintf(stderr, "Result code: %d\n", rc);
+ fprintf(stderr, "Error message: %s\n", sqlite3_errmsg(db));
+}
+
void LocalDb::Open(const char *path, const char *snapshot_name,
const char *snapshot_scheme)
{
throw IOException("Error starting transaction");
}
+ sqlite3_extended_result_codes(db, 1);
+
/* Insert this snapshot into the database, and determine the integer key
* which will be used to identify it. */
sqlite3_stmt *stmt = Prepare("insert into "
rc = sqlite3_step(stmt);
if (rc != SQLITE_DONE) {
+ ReportError(rc);
sqlite3_close(db);
throw IOException("Database execution error!");
}
snapshotid = sqlite3_last_insert_rowid(db);
sqlite3_finalize(stmt);
if (snapshotid == 0) {
+ ReportError(rc);
sqlite3_close(db);
throw IOException("Find snapshot id");
}
+
+ /* Create a temporary table which will be used to keep track of the objects
+ * used by this snapshot. When the database is closed, we will summarize
+ * the results of this table into segments_used. */
+ rc = sqlite3_exec(db,
+ "create temporary table snapshot_refs ("
+ " segmentid integer not null,"
+ " object text not null,"
+ " size integer not null"
+ ")", NULL, NULL, NULL);
+ if (rc != SQLITE_OK) {
+ ReportError(rc);
+ sqlite3_close(db);
+ throw IOException("Database initialization");
+ }
+ rc = sqlite3_exec(db,
+ "create unique index snapshot_refs_index "
+ "on snapshot_refs(segmentid, object)",
+ NULL, NULL, NULL);
+ if (rc != SQLITE_OK) {
+ ReportError(rc);
+ sqlite3_close(db);
+ throw IOException("Database initialization");
+ }
}
void LocalDb::Close()
{
int rc;
+
+ /* Summarize the snapshot_refs table into segments_used. */
+ sqlite3_stmt *stmt = Prepare("insert into segments_used "
+ "select ? as snapshotid, segmentid, "
+ "cast(used as real) / size as utilization "
+ "from "
+ "(select segmentid, sum(size) as used "
+ "from snapshot_refs group by segmentid) "
+ "join segments using (segmentid)");
+ sqlite3_bind_int64(stmt, 1, snapshotid);
+ rc = sqlite3_step(stmt);
+ if (rc != SQLITE_OK && rc != SQLITE_DONE) {
+ ReportError(rc);
+ sqlite3_close(db);
+ fprintf(stderr, "DATABASE ERROR: Unable to create segment summary!\n");
+ }
+ sqlite3_finalize(stmt);
+
+ /* Commit changes to the database and close. */
rc = sqlite3_exec(db, "commit", NULL, NULL, NULL);
if (rc != SQLITE_OK) {
- fprintf(stderr, "Can't commit database!\n");
+ fprintf(stderr, "DATABASE ERROR: Can't commit database!\n");
+ ReportError(rc);
}
sqlite3_close(db);
}
rc = sqlite3_step(stmt);
if (rc != SQLITE_DONE) {
fprintf(stderr, "Could not execute INSERT statement!\n");
+ ReportError(rc);
}
sqlite3_finalize(stmt);
(const char *)sqlite3_column_text(stmt, 1));
} else {
fprintf(stderr, "Could not execute SELECT statement!\n");
+ ReportError(rc);
}
sqlite3_finalize(stmt);
return ref;
}
-bool LocalDb::IsOldObject(const string &checksum, int64_t size, double *age)
+bool LocalDb::IsOldObject(const string &checksum, int64_t size, double *age,
+ int *group)
{
int rc;
sqlite3_stmt *stmt;
bool found = false;
- stmt = Prepare("select segmentid, object, timestamp from block_index "
- "where checksum = ? and size = ?");
+ stmt = Prepare("select segmentid, object, timestamp, expired "
+ "from block_index where checksum = ? and size = ?");
sqlite3_bind_text(stmt, 1, checksum.c_str(), checksum.size(),
SQLITE_TRANSIENT);
sqlite3_bind_int64(stmt, 2, size);
} else if (rc == SQLITE_ROW) {
found = true;
*age = sqlite3_column_double(stmt, 2);
+ *group = sqlite3_column_int(stmt, 3);
} else {
fprintf(stderr, "Could not execute SELECT statement!\n");
+ ReportError(rc);
}
sqlite3_finalize(stmt);
found = true;
} else {
fprintf(stderr, "Could not execute SELECT statement!\n");
+ ReportError(rc);
}
sqlite3_finalize(stmt);
rc = sqlite3_step(stmt);
if (rc != SQLITE_DONE) {
fprintf(stderr, "Could not execute INSERT statement!\n");
+ ReportError(rc);
+ }
+
+ sqlite3_finalize(stmt);
+
+ stmt = Prepare("insert or ignore into snapshot_refs "
+ "select segmentid, object, size from block_index "
+ "where segmentid = ? and object = ?");
+ sqlite3_bind_int64(stmt, 1, SegmentToId(ref.get_segment()));
+ sqlite3_bind_text(stmt, 2, obj.c_str(), obj.size(), SQLITE_TRANSIENT);
+
+ rc = sqlite3_step(stmt);
+ if (rc != SQLITE_DONE) {
+ fprintf(stderr, "Could not execute INSERT statement!\n");
+ ReportError(rc);
+ }
+
+ sqlite3_finalize(stmt);
+}
+
+void LocalDb::SetSegmentChecksum(const std::string &segment,
+ const std::string &path,
+ const std::string &checksum)
+{
+ int rc;
+ sqlite3_stmt *stmt;
+
+ stmt = Prepare("update segments set path = ?, checksum = ?, "
+ "size = (select sum(size) from block_index "
+ " where segmentid = ?) "
+ "where segmentid = ?");
+ sqlite3_bind_text(stmt, 1, path.c_str(), path.size(),
+ SQLITE_TRANSIENT);
+ sqlite3_bind_text(stmt, 2, checksum.c_str(), checksum.size(),
+ SQLITE_TRANSIENT);
+ sqlite3_bind_int64(stmt, 3, SegmentToId(segment));
+ sqlite3_bind_int64(stmt, 4, SegmentToId(segment));
+
+ rc = sqlite3_step(stmt);
+ if (rc != SQLITE_DONE) {
+ fprintf(stderr, "Could not update segment checksum in database!\n");
+ ReportError(rc);
+ }
+
+ sqlite3_finalize(stmt);
+}
+
+bool LocalDb::GetSegmentChecksum(const string &segment,
+ string *seg_path,
+ string *seg_checksum)
+{
+ int rc;
+ sqlite3_stmt *stmt;
+ ObjectReference ref;
+ int found = false;
+
+ stmt = Prepare("select path, checksum from segments where segment = ?");
+ sqlite3_bind_text(stmt, 1, segment.c_str(), segment.size(),
+ SQLITE_TRANSIENT);
+
+ rc = sqlite3_step(stmt);
+ if (rc == SQLITE_DONE) {
+ } else if (rc == SQLITE_ROW) {
+ found = true;
+ const char *val;
+
+ val = (const char *)sqlite3_column_text(stmt, 0);
+ if (val == NULL)
+ found = false;
+ else
+ *seg_path = val;
+
+ val = (const char *)sqlite3_column_text(stmt, 1);
+ if (val == NULL)
+ found = false;
+ else
+ *seg_checksum = val;
+ } else {
+ fprintf(stderr, "Could not execute SELECT statement!\n");
+ ReportError(rc);
}
sqlite3_finalize(stmt);
+
+ return found;
}
projects / cumulus.git / blobdiff