objectstore-client 0.0.16

Client SDK for Objectstore, the Sentry object storage platform

Objectstore Client

The client is used to interface with the objectstore backend. It handles responsibilities like transparent compression, and making sure that uploads and downloads are done as efficiently as possible.

Usage

import datetime

import urllib3

from objectstore_client import (
    Client,
    NoOpMetricsBackend,
    Permission,
    TimeToIdle,
    TimeToLive,
    TokenGenerator,
    Usecase,
)

# Necessary when using Objectstore instances that enforce authorization checks.
token_generator = TokenGenerator(
    "my-key-id",
    "<securely inject EdDSA private key>",
    expiry_seconds=60,
    permissions=Permission.max(),
)

# This should be stored in a global variable and reused, in order to reuse the connection
client = Client(
    "http://localhost:8888",
    # Optionally, bring your own metrics backend to record things like latency, throughput, and payload sizes
    metrics_backend=NoOpMetricsBackend(),
    # Optionally, enable distributed traces in Sentry
    propagate_traces=True,
    # Optionally, set timeout and retries
    timeout_ms=500, # 500ms timeout for requests
    retries=3,      # Number of connection retries
    # For further customization, provide additional kwargs for urllib3.HTTPConnectionPool
    connection_kwargs={"maxsize": 10},
    # Optionally, provide a token generator for Objectstore instances with authorization enforced
    token_generator=token_generator,
)

# This could also be stored in a global/shared variable, as you will deal with a fixed number of usecases with statically defined defaults
my_usecase = Usecase(
    "my-usecase",
    # Optionally, define defaults for all operations within this Usecase
    expiration_policy=TimeToLive(datetime.timedelta(days=1)),
)

# Start a Session, tied to your Usecase and a Scope.
# A Scope is a (possibly nested) namespace within Objectstore that provides isolation within a Usecase.
# The Scope is given as a sequence of key-value pairs through kwargs.
# Note that order matters!
# The admitted characters for keys and values are: `A-Za-z0-9_-()$!+*'`.
# You're encouraged to use the organization and project ID as the first components of the scope, as follows:
session = client.session(
    my_usecase, org=42, project=1337, app_slug="email_app"
)

# The following operations will raise an exception on failure

# Write an object and metadata
object_key = session.put(
    b"Hello, world!",
    # You can pass in your own key for the object to decide where to store the file.
    # Otherwise, Objectstore will pick a key and return it.
    # A put request to an existing key overwrites the contents and metadata.
    # key="hello",
    metadata={"key": "value"},
    # Overrides the default defined at the Usecase level
    expiration_policy=TimeToIdle(datetime.timedelta(days=30)),
)

# Read an object and its metadata
result = session.get(object_key)

content = result.payload.read()
assert content == b"Hello, world!"
assert result.metadata.custom["key"] == "value"

# Delete an object
session.delete(object_key)

Development

Environment Setup

The considerations for setting up the development environment that can be found in the main README apply for this package as well.

Pre-commit hook

A configuration to set up a git pre-commit hook using pre-commit is available at the root of the repository.

To install it, run

pre-commit install

The hook will automatically run some checks before every commit, including the linters and formatters we run in CI.