Google Cloud Bigtable HBase client for Java

Google Cloud Bigtable is Google's NoSQL Big Data database service. It's the same database that powers many core Google services, including Search, Analytics, Maps, and Gmail.

Bigtable is designed to handle massive workloads at consistent low latency and high throughput, so it's a great choice for both operational and analytical applications, including IoT, user analytics, and financial data analysis.

Bigtable provisions and scales to hundreds of petabytes automatically, and can smoothly handle millions of operations per second. Changes to the deployment configuration are immediate, so there is no downtime during reconfiguration.

Bigtable integrates easily with popular Big Data tools like Hadoop, as well as Google Cloud Platform products like Cloud Dataflow and Dataproc. Plus, Bigtable supports the open-source, industry-standard HBase API, which makes it easy for development teams to get started.

Project setup, installation, and configuration

Prerequisites

Create a Cloud Bigtable instance
Recommended: Install the Google Cloud SDK for Cloud Bigtable

Using the Java client

Add the appropriate Cloud Bigtable artifact dependencies to your Maven project.
- bigtable-hbase-1.x: use for standalone applications where you are in control of your dependencies.
- bigtable-hbase-1.x-hadoop: use in hadoop environments.
- bigtable-hbase-1.x-mapreduce: use for map/reduce utilities.
- bigtable-hbase-1.x-shaded: use in environments (other than hadoop) that require older versions of protobuf, guava, etc.
- bigtable-hbase-2.x: use for standalone applications where you are in control of your dependencies. This includes an HBase async client.
- bigtable-hbase-2.x-hadoop: use in hadoop environments.
- bigtable-hbase-2.x-shaded: use in environments (other than hadoop) that require older versions of protobuf, guava, etc.
Maven:
```
<dependency>
  <groupId>com.google.cloud.bigtable</groupId>
  <artifactId>bigtable-hbase-1.x</artifactId>
  <version>1.8.0</version>
</dependency>
```
Gradle:
```
compile 'com.google.cloud.bigtable:bigtable-hbase-1.x:1.8.0'
```
SBT:
```
libraryDependencies += "com.google.cloud.bigtable" % "bigtable-hbase-1.x" % "1.8.0"
```
Refer to the Java samples documentation for detailed demonstrations of how to read and write data with Cloud Bigtable. The code for these samples is avail

able in the Cloud Bigtable examples project.

Questions and discussions

If you have questions or run into issues with Google Cloud Bigtable or the client libraries, use any of the following forums:

Stack Overflow: tag questions with google-cloud-bigtable
Mailing list: google-cloud-bigtable-discuss@

You can also subscribe to google-cloud-bigtable-announce@ list to receive infrequent product and client library announcements.

Developing and testing

Run mvn clean install to build and install Cloud Bigtable client artifacts to your local repository, and then run the unit tests.
There is also a suite of integration tests that connect to a cluster you have access to, via the authentication credentials that were loaded during the Google Cloud SDK configuration step (see above).

Use the following command to run the Cloud Bigtable integration tests for HBase 1:
```
mvn clean verify \
    -PbigtableIntegrationTest \
    -Dgoogle.bigtable.project.id=[your cloud project id] \
    -Dgoogle.bigtable.instance.id=[your cloud bigtable instance id]
```
Use the following command to run the Cloud Bigtable integration tests for HBase 2:
```
mvn clean verify \
    -PbigtableIntegrationTestH2 \
    -Dgoogle.bigtable.project.id=[your cloud project id] \
    -Dgoogle.bigtable.instance.id=[your cloud bigtable instance id]
```
There are also tests that perform compatibility tests against an HBase Minicluster, which can be invoked with the following commands for HBase 1 and HBase 2 respectively:
```
mvn clean verify -PhbaseLocalMiniClusterTest
```
```
mvn clean verify -PhbaseLocalMiniClusterTestH2
```
You can run those commands at the top of the project, or you can run them at the appropriate integration-tests project.

Developer's NOTE: You can build the project faster by running the following command, and then run the integration test command from the appropriate integration test directory:
```
mvn -pl bigtable-hbase-1.x-parent/bigtable-hbase-1.x-integration-tests \
-pl bigtable-hbase-2.x-parent/bigtable-hbase-2.x-integration-tests \
-am clean install
```

NOTE: This project uses extensive shading which IDEs have trouble with. To overcome these issues, disable the with-shaded profile in your IDE to force it to resolve the dependencies from your local maven repository. When you disable that profile, attach workspace sources to the local maven repository jars.

Clients and Repositories

Name	Language	Repository	latest version	status
Cloud Bigtable Examples	Java, others	GoogleCloudPlatform/cloud-bigtable-examples
HBase client	Java	GoogleCloudPlatform/cloud-bigtable-client		GA
Cloud Bigtable GoLang	Go	googleapis/google-cloud-go	N/A	GA
Cloud Bigtable Java	java	googleapis/google-cloud-java		Beta
Cloud Bigtable Python	Python	googleapis/google-cloud-python		Beta
Cloud Bigtable Node.js	Node	googleaps/nodejs-bigtable		Beta
Cloud Bigtable C#	C#	googleapis/google-cloud-dotnet		Beta
Cloud Bigtable C++	C++	googleapis/google-cloud-cpp	0.2.0	Beta
Cloud Bigtable Ruby	Ruby	googleapis/google-cloud-ruby		Alpha
Cloud Bigtable PHP	PHP	googleapis/google-cloud-php		In progress