Gcpc::Interceptors
Gcpc::Interceptors is a collection of interceptors for gcpc.
Installation
Add this line to your application’s Gemfile:
ruby
gem 'gcpc-interceptors'
And then execute:
$ bundle
Or install it yourself as:
$ gem install gcpc-interceptors
Usage
Interceptors for Publisher
```ruby require “gcpc” require “gcpc-interceptors”
publisher = Gcpc::Publisher.new( project_id: “project-example-1”, topic: “topic-example-1”, interceptors: [ Gcpc::Publisher::Interceptors::EncodeInterceptor.new( content_type: :json ), Gcpc::Interceptors::Publisher::IdInterceptor.new, Gcpc::Interceptors::Publisher::PublisherNameInterceptor.new( publisher: “publisher-A” ), Gcpc::Interceptors::Publisher::TimestampInterceptor.new, ] emulator_host: “localhost:8085”, )
jsondata = { key: :value }
attributes = {}
publisher.publish(jsondata, attributes) # published as {"key":"value"}
, “published_by”:”publisher-A”,”published_at”:”2019-03-01T00:00:00+00:00”
```
Interceptors for Subscriber
```ruby require “gcpc” require “gcpc-interceptors”
class LogHandler < Gcpc::Subscriber::BaseHandler LOGGER = Logger.new(STDOUT)
def handle(data, attributes, message) LOGGER.info “#messagemessage.inspect” LOGGER.info “data: #data” LOGGER.info “attributes: #attributes” end end
redis_store = Gcpc::Interceptors::Utils::RedisStore.new(redis: Redis.new(ENV[“REDIS_URL”]))
class RaiseExceptionStrategy < Gcpc::Interceptors::Subscriber::CheckOrderInterceptor::BaseStrategy def on_swapped(data, attributes, message, &block) raise “Swapped!” end end
subscriber = Gcpc::Subscriber.new( project_id: “project-example-1”, subscription: “topic-example-1”, interceptors: [ Gcpc::Interceptors::Subscriber::DecodeInterceptor.new( strategy: Gcpc::Interceptors::Subscriber::DecodeInterceptor::JSONStrategy.new, ), Gcpc::Interceptors::Subscriber::CheckDupInterceptor.new( store: redis_store, ), Gcpc::Interceptors::Subscriber::CheckOrderInterceptor.new( store: redis_store, strategy: RaiseExceptionStrategy.new, ), ], emulator_host: “localhost:8085”, ) subscriber.handle(LogHandler)
subscriber.run ```
Development
After checking out the repo, run bin/setup
to install dependencies. Then, run bundle exec rspec
to run the tests. You can also run bin/console
for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install
. To release a new version, update the version number in version.rb
, and then run bundle exec rake release
, which will create a git tag for the version, push git commits and tags, and push the .gem
file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/south37/gcpc-interceptors.
License
The gem is available as open source under the terms of the MIT License.