Class TransactionPingingPool (2.1.1)

Version 2.1.1

• 3.51.0 (latest)
• 3.50.1
• 3.46.0
• 3.45.0
• 3.44.0
• 3.43.0
• 3.42.0
• 3.41.0
• 3.40.1
• 3.39.0
• 3.38.0
• 3.37.0
• 3.36.0
• 3.35.1
• 3.34.0
• 3.33.0
• 3.32.0
• 3.31.0
• 3.30.0
• 3.29.0
• 3.28.0
• 3.27.1
• 3.26.0
• 3.25.0
• 3.24.0
• 3.23.0
• 3.22.2
• 3.21.0
• 3.20.0
• 3.19.0
• 3.18.0
• 3.17.0
• 3.16.0
• 3.15.1
• 3.14.1
• 3.13.0
• 3.12.1
• 3.11.1
• 3.10.0
• 3.9.0
• 3.8.0
• 3.7.0
• 3.6.0
• 3.5.0
• 3.4.0
• 3.3.0
• 3.2.0
• 3.1.0
• 3.0.0
• 2.1.1
• 2.0.0
• 1.19.3
• 1.18.0
• 1.17.1
• 1.16.0
• 1.15.1
• 1.14.0
• 1.13.0
• 1.12.0
• 1.11.0
• 1.10.0

TransactionPingingPool(
    size=10, default_timeout=10, ping_interval=3000, labels=None
)

Concrete session pool implementation:

In addition to the features of PingingPool, this class creates and begins a transaction for each of its sessions at startup.

When a session is returned to the pool, if its transaction has been committed or rolled back, the pool creates a new transaction for the session and pushes the transaction onto a separate queue of "transactions to begin." The application is responsible for flushing this queue as appropriate via the pool's begin_pending_transactions method.

Parameters
Name	Description
size	int fixed pool size
default_timeout	int default timeout, in seconds, to wait for a returned session.
ping_interval	int interval at which to ping sessions.
labels	dict (str -> str) or None (Optional) user-assigned labels for sessions created by the pool.

Methods

begin_pending_transactions

begin_pending_transactions()

Begin all transactions for sessions added to the pool.

bind

bind(database)

Associate the pool with a database.

Parameter
Name	Description
database	Database database used by the pool: used to create sessions when needed.

put

put(session)

Return a session to the pool.

Never blocks: if the pool is full, raises.

Parameter
Name	Description
session	Session the session being returned.

Exceptions
Type	Description
`six.moves.queue.Full	if the queue is full.