Getting started¶ ↑

The gcloud library is installable through rubygems:

$ gem install gcloud

Gcloud aims to make authentication as simple as possible. Google Cloud requires a Project ID and Service Account Credentials to connect to the APIs. You can learn more about various options for connection on the Authentication Guide.

BigQuery¶ ↑

Google Cloud BigQuery (docs) enables super-fast, SQL-like queries against append-only tables, using the processing power of Google's infrastructure. Simply move your data into BigQuery and let it handle the hard work. You can control access to both the project and your data based on your business needs, such as giving others the ability to view or query your data.

See the gcloud-ruby BigQuery API documentation to learn how to connect to Cloud BigQuery using this library.

require "gcloud"

gcloud = Gcloud.new
bigquery = gcloud.bigquery

# Create a new table to archive todos
dataset = bigquery.dataset "my-todo-archive"
table = dataset.create_table "todos",
          name: "Todos Archive",
          description: "Archive for completed TODO records"

# Load data into the table
file = File.open "/archive/todos/completed-todos.csv"
load_job = table.load file

# Run a query for the number of completed todos by owner
count_sql = "SELECT owner, COUNT(*) AS complete_count FROM todos GROUP BY owner"
data = bigquery.query count_sql
data.each do |row|
  puts row["name"]
end

Datastore¶ ↑

Google Cloud Datastore (docs) is a fully managed, schemaless database for storing non-relational data. Cloud Datastore automatically scales with your users and supports ACID transactions, high availability of reads and writes, strong consistency for reads and ancestor queries, and eventual consistency for all other queries.

Follow the activation instructions to use the Google Cloud Datastore API with your project.

See the gcloud-ruby Datastore API documentation to learn how to interact with the Cloud Datastore using this library.

require "gcloud"

gcloud = Gcloud.new
dataset = gcloud.datastore

# Create a new task to demo datastore
demo_task = Gcloud::Datastore::Entity.new
demo_task.key = Gcloud::Datastore::Key.new "Task", "datastore-demo"
demo_task[:description] = "Demonstrate Datastore functionality"
demo_task[:completed] = false

# Save the new task
dataset.save demo_task

# Run a query for all completed tasks
query = Gcloud::Datastore::Query.new.kind("Task").
  where("completed", "=", true)
completed_tasks = dataset.run query

Pub/Sub¶ ↑

Google Cloud Pub/Sub (docs) is designed to provide reliable, many-to-many, asynchronous messaging between applications. Publisher applications can send messages to a “topic” and other applications can subscribe to that topic to receive the messages. By decoupling senders and receivers, Google Cloud Pub/Sub allows developers to communicate between independently written applications.

See the gcloud-ruby Pub/Sub API documentation to learn how to connect to Cloud Pub/Sub using this library.

require "gcloud"

gcloud = Gcloud.new
pubsub = gcloud.pubsub

# Retrieve a topic
topic = pubsub.topic "my-topic"

# Publish a new message
msg = topic.publish "new-message"

# Retrieve a subscription
sub = pubsub.subscription "my-topic-sub"

# Pull available messages
msgs = sub.pull

Storage¶ ↑

Google Cloud Storage (docs) allows you to store data on Google infrastructure with very high reliability, performance and availability, and can be used to distribute large data objects to users via direct download.

See the gcloud-ruby Storage API documentation to learn how to connect to Cloud Storage using this library.

require "gcloud"

gcloud = Gcloud.new
storage = gcloud.storage

bucket = storage.bucket "task-attachments"

file = bucket.file "path/to/my-file.ext"

# Download the file to the local file system
file.download "/tasks/attachments/#{file.name}"

# Copy the file to a backup bucket
backup = storage.bucket "task-attachment-backups"
file.copy backup, file.name