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LSST Data Management Base Package
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lsst.dax.apdb.scripts.create_cassandra Namespace Reference

Functions

None create_cassandra (str output_config, str|None ra_dec_columns, str|None table_options=None, **Any kwargs)
 
CreateTableOptions|None _read_table_options (str|None table_options=None)
 

Function Documentation

◆ _read_table_options()

CreateTableOptions | None lsst.dax.apdb.scripts.create_cassandra._read_table_options ( str | None table_options = None)
protected
Read contents of the table options file.

Definition at line 70 of file create_cassandra.py.

70def _read_table_options(table_options: str | None = None) -> CreateTableOptions | None:
71 """Read contents of the table options file."""
72 if not table_options:
73 return None
74
75 res = ResourcePath(table_options)
76 content = res.read()
77 stream = io.BytesIO(content)
78 if model_data := yaml.load(stream, Loader=yaml.SafeLoader):
79 return CreateTableOptions.model_validate(model_data)
80 return None

◆ create_cassandra()

None lsst.dax.apdb.scripts.create_cassandra.create_cassandra ( str output_config,
str | None ra_dec_columns,
str | None table_options = None,
**Any kwargs )
Create new APDB instance in Cassandra cluster.

Parameters
----------
output_config : `str`
    Name of the file to write APDB configuration.
ra_dec_columns : `str` or `None`
    Comma-separated list of names for ra/dec columns in DiaObject table.
table_options : `str`, optional
    Path or URI of the YAML file with table options.
**kwargs
    Keyword arguments passed to `ApdbCassandra.init_database` method.

Definition at line 37 of file create_cassandra.py.

39) -> None:
40 """Create new APDB instance in Cassandra cluster.
41
42 Parameters
43 ----------
44 output_config : `str`
45 Name of the file to write APDB configuration.
46 ra_dec_columns : `str` or `None`
47 Comma-separated list of names for ra/dec columns in DiaObject table.
48 table_options : `str`, optional
49 Path or URI of the YAML file with table options.
50 **kwargs
51 Keyword arguments passed to `ApdbCassandra.init_database` method.
52 """
53 options = _read_table_options(table_options)
54 ra_dec_tuple: tuple[str, str] | None = None
55 if ra_dec_columns:
56 ra_dec_list = ra_dec_columns.split(",")
57 if len(ra_dec_list) != 2:
58 raise ValueError(f"--ra-dec-columns must specify exactly two columns: {ra_dec_columns}")
59 ra_dec_tuple = (ra_dec_list[0], ra_dec_list[1])
60 kwargs["hosts"] = kwargs.pop("host")
61 config = ApdbCassandra.init_database(ra_dec_columns=ra_dec_tuple, table_options=options, **kwargs)
62 config.save(output_config)
63 if output_config.endswith(".py"):
64 warnings.warn(
65 "APDB configuration is now saved in YAML format, "
66 "output file should use .yaml extension instead of .py."
67 )
68
69