lsst.dax.apdb.apdbReplica.ReplicaChunk Class Reference

Public Member Functions
ReplicaChunk	make_replica_chunk (cls, astropy.time.Time last_update_time, int chunk_window_seconds)
str	__str__ (self)

Static Public Attributes
int	id
astropy	last_update_time .time.Time
uuid	unique_id .UUID

Detailed Description

Class used for identification of replication chunks.

Instances of this class are used to identify the units of transfer from
APDB to PPDB. Usually single `ReplicaChunk` corresponds to multiple
consecutive calls to `Apdb.store` method.

Every ``store`` with the same ``id`` value will update ``unique_id`` with
some unique value so that it can be verified on PPDB side.

Definition at line 71 of file apdbReplica.py.

Member Function Documentation

__str__()

str lsst.dax.apdb.apdbReplica.ReplicaChunk.__str__

(

self

)

Definition at line 103 of file apdbReplica.py.

    def __str__(self) -> str:
        class_name = self.__class__.__name__
        time_str = str(self.last_update_time.tai.isot)
        return f"{class_name}(id={self.id:10d}, last_update_time={time_str}/tai, unique_id={self.unique_id})"
 
 

make_replica_chunk()

ReplicaChunk lsst.dax.apdb.apdbReplica.ReplicaChunk.make_replica_chunk	(		cls,
		astropy.time.Time	last_update_time,
		int	chunk_window_seconds )

Generate new unique insert identifier.

Definition at line 94 of file apdbReplica.py.

    ) -> ReplicaChunk:
        """Generate new unique insert identifier."""
        seconds = int(last_update_time.unix_tai)
        seconds = (seconds // chunk_window_seconds) * chunk_window_seconds
        unique_id = uuid.uuid4()
        return ReplicaChunk(id=seconds, last_update_time=last_update_time, unique_id=unique_id)
 

Member Data Documentation

id

int lsst.dax.apdb.apdbReplica.ReplicaChunk.id

static

Definition at line 82 of file apdbReplica.py.

last_update_time

astropy lsst.dax.apdb.apdbReplica.ReplicaChunk.last_update_time .time.Time

static

Definition at line 85 of file apdbReplica.py.

unique_id

uuid lsst.dax.apdb.apdbReplica.ReplicaChunk.unique_id .UUID

static

Definition at line 90 of file apdbReplica.py.

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/dax_apdb/g88963caddf+0cb8e002cc/python/lsst/dax/apdb/apdbReplica.py