def create(klass, fs, root, name, metadata=None):
"""Create a new TSDBSet with name name rooted at root."""
if metadata is None:
metadata = {}
path = os.path.join(root, name)
if fs.exists(path):
raise TSDBNameInUseError("%s already exists at %s" % (name, path))
fs.makedir(path)
write_dict(fs, os.path.join(path, klass.tag), metadata)
def create(klass, path, metadata=None, chunk_prefixes=[]):
"""Create a new TSDB.
``chunk_prefixes``
a list of alternate prefixes to locate chunks
"""
if metadata is None:
metadata = {}
if os.path.exists(os.path.join(path, "TSDB")):
raise TSDBAlreadyExistsError("database already exists")
metadata["CREATION_TIME"] = time.time()
metadata["CHUNK_PREFIXES"] = chunk_prefixes
if not os.path.exists(path):
os.mkdir(path)
fs = get_fs(path, [])
write_dict(fs, os.path.join("/", klass.tag), metadata)
return klass(path)
def create(klass, fs, root, name, vartype, step, chunk_mapper, metadata=None):
"""Create a new TSDBVar."""
if metadata is None:
metadata = {}
path = os.path.join(root, name)
if fs.exists(path):
raise TSDBNameInUseError("%s already exists at %s" % (name, path))
if type(vartype) == str:
exec("vartype = tsdb.%s" % vartype)
elif type(vartype) == int:
vartype = ROW_TYPE_MAP[vartype]
metadata["NAME"] = name
metadata["TYPE_ID"] = vartype.type_id
metadata["VERSION"] = vartype.version
metadata["STEP"] = step
metadata["CREATION_TIME"] = time.time()
metadata["CHUNK_MAPPER_ID"] = chunk_mapper.chunk_mapper_id
fs.makedir(path)
write_dict(fs, os.path.join(path, klass.tag), metadata)
def save_metadata(self):
"""Save metadata for this container."""
write_dict(self.fs, os.path.join(self.path, self.tag), self.metadata)
