Cloud Firestore V1 Client - Class ConcurrencyMode (2.3.4)
2.3.4 (latest)
2.3.3
2.2.0-RC1
2.1.0
2.0.2-RC1
1.55.0
1.54.4
1.53.1
1.52.0
1.51.0
1.50.0
1.48.1
1.47.3
1.46.0
1.45.2
1.44.1
1.43.3
1.40.0
1.39.0
1.38.0
1.37.7
1.36.1
1.35.0
1.34.0
1.33.0
1.32.0
1.31.0
1.30.0
1.28.0
1.27.3
Reference documentation and code samples for the Cloud Firestore V1 Client class ConcurrencyMode.
The type of concurrency control mode for transactions.
Protobuf type google.firestore.v1.TransactionOptions.ConcurrencyMode
Namespace
Google \ Cloud \ Firestore \ V1 \ TransactionOptions
Methods
static::name
Parameter
Name Description
value
mixed
static::value
Parameter
Name Description
name
mixed
Constants
CONCURRENCY_MODE_UNSPECIFIED
Start the transaction with the database-level default concurrency mode.
Generated from protobuf enum CONCURRENCY_MODE_UNSPECIFIED = 0;
OPTIMISTIC
Use optimistic concurrency control for the new transaction.
Generated from protobuf enum OPTIMISTIC = 1;
PESSIMISTIC
Use pessimistic concurrency control for the new transaction.
Generated from protobuf enum PESSIMISTIC = 2;
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License , and code samples are licensed under the Apache 2.0 License . For details, see the Google Developers Site Policies . Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2026-10-20 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-10-20 UTC."],[],[]]
