LittleTable

Overview

LittleTable is an emulator for Google Cloud Bigtable, intended to replace the emulator distributed with the gcloud utility.

It aims to provide full compatibility with the Cloud Bigtable API, and fill the gaps in the Go-based emulator, such as the sink filter.

Getting the emulator

Maven:

<dependency>
  <groupId>com.steveniemitz</groupId>
  <artifactId>littletable_2.12</artifactId>
  <version>1.1.0</version>
</dependency>

Gradle:

compile 'com.steveniemitz:littletable_2.12:1.0.0'

sbt:

libraryDependencies += "com.steveniemitz" %% "littletable" % "1.0.0"

Other Dependencies

LittleTable assumes you'll "bring your own" dependencies for gRPC as well as bigtable-client-core. By default, bigtable-client-core will also include the required gRPC dependencies, so adding a dependency to that is all that's required.

See build.sbt for reasonable defaults.

Usage

BigtableEmulator.newBuilder (or BigtableEmulators.newBuilder in Java) can be used to obtain an emulator builder. The builder can configure an in-process gRPC transport, or a TCP transport (or both). When using the in-process emulator, the session provided by the built emulator must be used. For advanced usage, BigtableEmulator.Builder.configureServerBuilder can be used to configure a user-provided gRPC server builder.

val emulator = 
  BigtableEmulator.newBuilder
    .withInProcess
    .build()

// Start the emulator    
emulator.start()

// Use the client
val session = emulator.session
val rows = session.getDataClient.readFlatRowsList(...)

See the BigtableTestSuite for a full example.