Integration Bigtable Extension

Track Google Cloud Bigtable operations in your test diagrams using the Kronikol.Extensions.Bigtable NuGet package. This extension wraps BigtableClient to capture row-level operations with table name extraction and configurable verbosity.

Using a shared library or abstraction layer? If your code doesn't use the Bigtable SDK directly — e.g. it goes through a shared data-access library, wrapper, or custom abstraction — this extension won't be able to intercept the underlying calls. See Tracking Custom Dependencies for alternative approaches including RequestResponseLogger.LogPair(), TrackingProxy<T>, and MessageTracker.

Installation

dotnet add package Kronikol.Extensions.Bigtable

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How It Works

Google Cloud Bigtable uses gRPC internally, so DelegatingHandler interception is not viable. Instead, this extension uses a tracker/classifier pattern:

• BigtableTracker implements ITrackingComponent and handles request/response logging with RequestResponseMetaType.Event and DependencyCategory: "Bigtable"
• BigtableOperationClassifier classifies method calls into operation types and generates diagram labels

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Supported Operations

Operation	Enum Value	Description
Read rows	BigtableOperation.ReadRows	Read one or more rows with optional filters
Mutate single row	BigtableOperation.MutateRow	Apply mutations to a single row
Mutate multiple rows	BigtableOperation.MutateRows	Batch mutations across multiple rows
Check and mutate	BigtableOperation.CheckAndMutateRow	Conditional mutation (read-modify-write)
Read-modify-write	BigtableOperation.ReadModifyWriteRow	Atomic read-modify-write on a single row
Sample row keys	BigtableOperation.SampleRowKeys	Get a sample of row keys for splitting

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Verbosity Levels

BigtableTrackingVerbosity.Summarised

• Label: Short operation name (e.g. ReadRows, MutateRow, CheckAndMutate)
• Content: Omitted
• URI: bigtable:///my-table

BigtableTrackingVerbosity.Detailed

• Label: Operation with table name (e.g. ReadRows ← my-table, MutateRow → my-table, MutateRows (×5) → my-table)
• Content: Included
• URI: bigtable:///my-table (short name extracted from full resource path)

BigtableTrackingVerbosity.Raw

• Label: Full info including resource paths and row keys
• Content: Full details
• URI: bigtable:///projects/p/instances/i/tables/my-table

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Resource Name Extraction

Bigtable uses full resource paths like projects/my-project/instances/my-instance/tables/my-table. At Detailed and Summarised verbosity, the short table name is extracted:

• projects/my-project/instances/my-instance/tables/my-table → my-table

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Setup

Option A: Direct Tracker Usage

using Kronikol.Extensions.Bigtable;

var tracker = new BigtableTracker(new BigtableTrackingOptions
{
    ServiceName = "Bigtable",
    CallerName = "OrdersApi",
    CurrentTestInfoFetcher = CurrentTestInfo.Fetcher
});

// Classify and log
var op = BigtableOperationClassifier.Classify("ReadRows", tableName);
var (reqId, traceId) = tracker.LogRequest(op, "filter expression");

// ... execute Bigtable operation ...

tracker.LogResponse(op, reqId, traceId, "5 rows returned");

Option B: DI Registration

services.AddBigtableTestTracking(options =>
{
    options.ServiceName = "Bigtable";
    options.CallerName = "OrdersApi";
    options.CurrentTestInfoFetcher = CurrentTestInfo.Fetcher;
});

Then inject BigtableTracker where needed.

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Configuration

BigtableTrackingOptions

Property	Type	Default	Description
ServiceName	string	"Bigtable"	Display name in diagrams for the Bigtable service
CallerName	string	"Caller"	Calling service name in diagrams
Verbosity	BigtableTrackingVerbosity	Detailed	Verbosity level (Raw, Detailed, Summarised)
ExcludedOperations	HashSet<BigtableOperation>	[]	Operations to suppress entirely (e.g. [BigtableOperation.SampleRowKeys])
CurrentTestInfoFetcher	Func<(string Name, string Id)>?	null	Required: provides test context for log correlation
CurrentStepTypeFetcher	Func<string?>?	null	Optional — returns the current BDD step type
SetupVerbosity	BigtableTrackingVerbosity?	null	Verbosity override for the Setup phase. See Phase-Aware Tracking
ActionVerbosity	BigtableTrackingVerbosity?	null	Verbosity override for the Action phase. See Phase-Aware Tracking
TrackDuringSetup	bool	true	When false, tracking is suppressed during Setup
TrackDuringAction	bool	true	When false, tracking is suppressed during Action

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Diagram Label Examples

Operation	Raw	Detailed	Summarised
Read rows	ReadRows table=projects/p/instances/i/tables/users row=	ReadRows ← users	ReadRows
Mutate single row	MutateRow table=projects/p/instances/i/tables/users row=user123	MutateRow → users	MutateRow
Mutate batch (5 rows)	MutateRows table=projects/p/instances/i/tables/users row=	MutateRows (×5) → users	MutateRow
Check and mutate	CheckAndMutateRow table=.../users row=user123	CheckAndMutate → users	CheckAndMutate
Read-modify-write	ReadModifyWriteRow table=.../users row=user123	ReadModifyWrite → users	ReadModifyWrite
Sample row keys	SampleRowKeys table=.../users row=	SampleRowKeys ← users	SampleRowKeys

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ITrackingComponent

BigtableTracker implements ITrackingComponent and auto-registers:

• ComponentName: "BigtableTracker ({ServiceName})"
• WasInvoked: true after first operation
• InvocationCount: Total operations logged

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See Also

• Integration Spanner Extension
• Integration BigQuery Extension
• Integration CosmosDB Extension
• Integration DynamoDB Extension