static void
test_Write_File_and_Read_File(TestBatch *batch)
{
RAMFolder *folder = RAMFolder_new(NULL);
Segment *segment = Seg_new(100);
Segment *got = Seg_new(100);
CharBuf *meta;
CharBuf *flotsam = (CharBuf*)ZCB_WRAP_STR("flotsam", 7);
CharBuf *jetsam = (CharBuf*)ZCB_WRAP_STR("jetsam", 6);
Seg_Set_Count(segment, 111);
Seg_Store_Metadata_Str(segment, "foo", 3, (Obj*)CB_newf("bar"));
Seg_Add_Field(segment, flotsam);
Seg_Add_Field(segment, jetsam);
RAMFolder_MkDir(folder, Seg_Get_Name(segment));
Seg_Write_File(segment, (Folder*)folder);
Seg_Read_File(got, (Folder*)folder);
TEST_TRUE(batch, Seg_Get_Count(got) == Seg_Get_Count(segment),
"Round-trip count through file");
TEST_TRUE(batch,
Seg_Field_Num(got, jetsam) == Seg_Field_Num(segment, jetsam),
"Round trip field names through file");
meta = (CharBuf*)Seg_Fetch_Metadata_Str(got, "foo", 3);
TEST_TRUE(batch, meta && CB_Is_A(meta, CHARBUF)
&& CB_Equals_Str(meta, "bar", 3), "Round trip metadata through file");
DECREF(got);
DECREF(segment);
DECREF(folder);
}
static void
test_Write_File_and_Read_File(TestBatchRunner *runner) {
RAMFolder *folder = RAMFolder_new(NULL);
Segment *segment = Seg_new(100);
Segment *got = Seg_new(100);
String *meta;
String *flotsam = (String*)SSTR_WRAP_UTF8("flotsam", 7);
String *jetsam = (String*)SSTR_WRAP_UTF8("jetsam", 6);
Seg_Set_Count(segment, 111);
Seg_Store_Metadata_Utf8(segment, "foo", 3, (Obj*)Str_newf("bar"));
Seg_Add_Field(segment, flotsam);
Seg_Add_Field(segment, jetsam);
RAMFolder_MkDir(folder, Seg_Get_Name(segment));
Seg_Write_File(segment, (Folder*)folder);
Seg_Read_File(got, (Folder*)folder);
TEST_TRUE(runner, Seg_Get_Count(got) == Seg_Get_Count(segment),
"Round-trip count through file");
TEST_TRUE(runner,
Seg_Field_Num(got, jetsam) == Seg_Field_Num(segment, jetsam),
"Round trip field names through file");
meta = (String*)Seg_Fetch_Metadata_Utf8(got, "foo", 3);
TEST_TRUE(runner,
meta
&& Str_Is_A(meta, STRING)
&& Str_Equals_Utf8(meta, "bar", 3),
"Round trip metadata through file");
DECREF(got);
DECREF(segment);
DECREF(folder);
}
void
S_try_open_elements(void *context) {
struct try_open_elements_context *args
= (struct try_open_elements_context*)context;
PolyReader *self = args->self;
PolyReaderIVARS *const ivars = PolyReader_IVARS(self);
VArray *files = Snapshot_List(ivars->snapshot);
Folder *folder = PolyReader_Get_Folder(self);
uint32_t num_segs = 0;
uint64_t latest_schema_gen = 0;
CharBuf *schema_file = NULL;
// Find schema file, count segments.
for (uint32_t i = 0, max = VA_Get_Size(files); i < max; i++) {
CharBuf *entry = (CharBuf*)VA_Fetch(files, i);
if (Seg_valid_seg_name(entry)) {
num_segs++;
}
else if (CB_Starts_With_Str(entry, "schema_", 7)
&& CB_Ends_With_Str(entry, ".json", 5)
) {
uint64_t gen = IxFileNames_extract_gen(entry);
if (gen > latest_schema_gen) {
latest_schema_gen = gen;
if (!schema_file) { schema_file = CB_Clone(entry); }
else { CB_Mimic(schema_file, (Obj*)entry); }
}
}
}
// Read Schema.
if (!schema_file) {
DECREF(files);
THROW(ERR, "Can't find a schema file.");
}
else {
Hash *dump = (Hash*)Json_slurp_json(folder, schema_file);
if (dump) { // read file successfully
DECREF(ivars->schema);
ivars->schema = (Schema*)CERTIFY(
VTable_Load_Obj(SCHEMA, (Obj*)dump), SCHEMA);
DECREF(dump);
DECREF(schema_file);
schema_file = NULL;
}
else {
CharBuf *mess = MAKE_MESS("Failed to parse %o", schema_file);
DECREF(schema_file);
DECREF(files);
Err_throw_mess(ERR, mess);
}
}
VArray *segments = VA_new(num_segs);
for (uint32_t i = 0, max = VA_Get_Size(files); i < max; i++) {
CharBuf *entry = (CharBuf*)VA_Fetch(files, i);
// Create a Segment for each segmeta.
if (Seg_valid_seg_name(entry)) {
int64_t seg_num = IxFileNames_extract_gen(entry);
Segment *segment = Seg_new(seg_num);
// Bail if reading the file fails (probably because it's been
// deleted and a new snapshot file has been written so we need to
// retry).
if (Seg_Read_File(segment, folder)) {
VA_Push(segments, (Obj*)segment);
}
else {
CharBuf *mess = MAKE_MESS("Failed to read %o", entry);
DECREF(segment);
DECREF(segments);
DECREF(files);
Err_throw_mess(ERR, mess);
}
}
}
// Sort the segments by age.
VA_Sort(segments, NULL, NULL);
// Open individual SegReaders.
struct try_open_segreader_context seg_context;
seg_context.schema = PolyReader_Get_Schema(self);
seg_context.folder = folder;
seg_context.snapshot = PolyReader_Get_Snapshot(self);
seg_context.segments = segments;
seg_context.result = NULL;
args->seg_readers = VA_new(num_segs);
Err *error = NULL;
for (uint32_t seg_tick = 0; seg_tick < num_segs; seg_tick++) {
seg_context.seg_tick = seg_tick;
error = Err_trap(S_try_open_segreader, &seg_context);
if (error) {
break;
}
VA_Push(args->seg_readers, (Obj*)seg_context.result);
seg_context.result = NULL;
}
DECREF(segments);
DECREF(files);
if (error) {
DECREF(args->seg_readers);
args->seg_readers = NULL;
RETHROW(error);
}
}
