Class: QueueBus::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/queue_bus/application.rb

Overview

An Application is the top level unifier for a number of subscriptions. It allows for the toggling of an entire applications subscriptions.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app_key) ⇒ Application

Returns a new instance of Application.



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# File 'lib/queue_bus/application.rb', line 31

def initialize(app_key)
  @app_key = self.class.normalize(app_key)
  @redis_key = "#{self.class.app_single_key}:#{@app_key}"
  # raise error if only other chars
  raise 'Invalid application name' if @app_key.gsub('_', '').empty?
end

Instance Attribute Details

#app_key ⇒ Object (readonly)

Returns the value of attribute app_key.



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# File 'lib/queue_bus/application.rb', line 29

def app_key
  @app_key
end

#redis_key ⇒ Object (readonly)

Returns the value of attribute redis_key.



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# File 'lib/queue_bus/application.rb', line 29

def redis_key
  @redis_key
end

Class Method Details

.all ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 8

def all
  # note the names arent the same as we started with
  ::QueueBus.redis do |redis|
    app_keys = redis.smembers(app_list_key)
    apps = app_keys.collect { |val| new(val) }

    hashes = redis.pipelined do
      apps.each do |app|
        redis.hgetall(app.redis_key)
      end
    end

    apps.zip(hashes).each do |app, hash|
      app._hydrate_redis_hash(hash)
    end

    apps
  end
end

Instance Method Details

#_hydrate_redis_hash(hash) ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 108

def _hydrate_redis_hash(hash)
  @raw_redis_hash = hash
end

#event_display_tuples ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 100

def event_display_tuples
  out = []
  subscriptions.all.each do |sub|
    out << [sub.class_name, sub.queue_name, sub.matcher.filters]
  end
  out
end

#no_connect_queue_names_for(subscriptions) ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 82

def no_connect_queue_names_for(subscriptions)
  out = []
  subscriptions.all.each do |sub|
    queue = "#{app_key}_#{sub.queue_name}"
    out << queue
  end
  out << "#{app_key}_default"
  out.uniq
end

#subscribe(subscription_list, log = false) ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 38

def subscribe(subscription_list, log = false)
  @subscriptions = nil

  if subscription_list.nil? || subscription_list.empty?
    unsubscribe
    return true
  end

  temp_key = "temp_#{redis_key}:#{rand(999_999_999)}"

  ::QueueBus.redis do |redis|
    redis_hash = subscription_list.to_redis

    redis_hash.each do |key, hash|
      redis.hset(temp_key, key, QueueBus::Util.encode(hash))
    end

    # make it the real one
    redis.rename(temp_key, redis_key)
    redis.sadd(self.class.app_list_key, app_key)

    redis.hgetall(redis_key).inspect if log
  end

  true
end

#subscription_matches(attributes) ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 92

def subscription_matches(attributes)
  out = subscriptions.matches(attributes)
  out.each do |sub|
    sub.app_key = app_key
  end
  out
end

#unsubscribe ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 74

def unsubscribe
  # Remove everything.
  ::QueueBus.redis do |redis|
    redis.srem(self.class.app_list_key, app_key)
    redis.del(redis_key)
  end
end

#unsubscribe_queue(queue) ⇒ Object 



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# File 'lib/queue_bus/application.rb', line 65

def unsubscribe_queue(queue)
  # Filters out all subscriptions that match the supplied queue name.
  ::QueueBus.redis do |redis|
    read_redis_hash.each do |key, hash_details|
      redis.hdel(redis_key, key) if queue == hash_details["queue_name"]
    end
  end
end