Class: Etcdv3::Namespace::Watch

Inherits:
Object
  • Object
show all
Includes:
Utilities, GRPC::Core::TimeConsts
Defined in:
lib/etcdv3/namespace/watch.rb

Instance Method Summary collapse

Methods included from Utilities

#delete_prefix, #prepend_prefix, #strip_prefix, #strip_prefix_from_events, #strip_prefix_from_lock

Constructor Details

#initialize(hostname, credentials, timeout, namespace, metadata = {}) ⇒ Watch 



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# File 'lib/etcdv3/namespace/watch.rb', line 6

def initialize(hostname, credentials, timeout, namespace, metadata = {})
  @stub = Etcdserverpb::Watch::Stub.new(hostname, credentials, **metadata.delete(:client_options) || {})
  @timeout = timeout
  @namespace = namespace
  @metadata = metadata
end

Instance Method Details

#deadline(timeout) ⇒ Object 



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# File 'lib/etcdv3/namespace/watch.rb', line 33

def deadline(timeout)
  from_relative_time(timeout || @timeout)
end

#watch(key, range_end, start_revision, block, timeout: nil) ⇒ Object 



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# File 'lib/etcdv3/namespace/watch.rb', line 13

def watch(key, range_end, start_revision, block, timeout: nil)      
  key = prepend_prefix(@namespace, key)
  range_end = prepend_prefix(@namespace, range_end) if range_end
  create_req = Etcdserverpb::WatchCreateRequest.new(key: key)
  create_req.range_end = range_end if range_end
  create_req.start_revision = start_revision if start_revision
  watch_req = Etcdserverpb::WatchRequest.new(create_request: create_req)
  events = nil
  @stub.watch([watch_req], metadata: @metadata, deadline: deadline(timeout)).each do |resp|
    next if resp.events.empty?
    if block
      block.call(strip_prefix_from_events(@namespace, resp.events))
    else
      events = strip_prefix_from_events(@namespace, resp.events)
      break
    end
  end
  events
end