Class: Gush::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/gush/client.rb

Constant Summary collapse

@@redis_connection = 
Concurrent::ThreadLocalVar.new(nil)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config = Gush.configuration) ⇒ Client

Returns a new instance of Client.



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# File 'lib/gush/client.rb', line 20

def initialize(config = Gush.configuration)
  @configuration = config
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/gush/client.rb', line 6

def configuration
  @configuration
end

Class Method Details

.redis_connection(config) ⇒ Object 



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# File 'lib/gush/client.rb', line 10

def self.redis_connection(config)
  cached = (@@redis_connection.value ||= { url: config.redis_url, connection: nil })
  return cached[:connection] if !cached[:connection].nil? && config.redis_url == cached[:url]

  Redis.new(url: config.redis_url).tap do |instance|
    RedisClassy.redis = instance
    @@redis_connection.value = { url: config.redis_url, connection: instance }
  end
end

Instance Method Details

#all_workflows ⇒ Object 



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# File 'lib/gush/client.rb', line 83

def all_workflows
  redis.scan_each(match: "gush.workflows.*").map do |key|
    id = key.sub("gush.workflows.", "")
    find_workflow(id)
  end
end

#configure {|configuration| ... } ⇒ Object

Yields:



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# File 'lib/gush/client.rb', line 24

def configure
  yield configuration
end

#create_workflow(name) ⇒ Object 



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# File 'lib/gush/client.rb', line 28

def create_workflow(name)
  begin
    name.constantize.create
  rescue NameError
    raise WorkflowNotFound.new("Workflow with given name doesn't exist")
  end
  flow
end

#destroy_job(workflow_id, job) ⇒ Object 



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# File 'lib/gush/client.rb', line 140

def destroy_job(workflow_id, job)
  redis.del("gush.jobs.#{workflow_id}.#{job.klass}")
end

#destroy_workflow(workflow) ⇒ Object 



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# File 'lib/gush/client.rb', line 135

def destroy_workflow(workflow)
  redis.del("gush.workflows.#{workflow.id}")
  workflow.jobs.each {|job| destroy_job(workflow.id, job) }
end

#enqueue_job(workflow_id, job) ⇒ Object 



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# File 'lib/gush/client.rb', line 155

def enqueue_job(workflow_id, job)
  job.enqueue!
  persist_job(workflow_id, job)
  queue = job.queue || configuration.namespace

  Gush::Worker.set(queue: queue).perform_later(*[workflow_id, job.name])
end

#expire_job(workflow_id, job, ttl = nil) ⇒ Object 



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# File 'lib/gush/client.rb', line 150

def expire_job(workflow_id, job, ttl=nil)
  ttl = ttl || configuration.ttl
  redis.expire("gush.jobs.#{workflow_id}.#{job.klass}", ttl)
end

#expire_workflow(workflow, ttl = nil) ⇒ Object 



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# File 'lib/gush/client.rb', line 144

def expire_workflow(workflow, ttl=nil)
  ttl = ttl || configuration.ttl
  redis.expire("gush.workflows.#{workflow.id}", ttl)
  workflow.jobs.each {|job| expire_job(workflow.id, job, ttl) }
end

#find_job(workflow_id, job_name) ⇒ Object 



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# File 'lib/gush/client.rb', line 120

def find_job(workflow_id, job_name)
  job_name_match = /(?<klass>\w*[^-])-(?<identifier>.*)/.match(job_name)

  data = if job_name_match
           find_job_by_klass_and_id(workflow_id, job_name)
         else
           find_job_by_klass(workflow_id, job_name)
         end

  return nil if data.nil?

  data = Gush::JSON.decode(data, symbolize_keys: true)
  Gush::Job.from_hash(data)
end

#find_workflow(id) ⇒ Object 



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# File 'lib/gush/client.rb', line 90

def find_workflow(id)
  data = redis.get("gush.workflows.#{id}")

  unless data.nil?
    hash = Gush::JSON.decode(data, symbolize_keys: true)
    keys = redis.scan_each(match: "gush.jobs.#{id}.*")

    nodes = keys.each_with_object([]) do |key, array|
      array.concat redis.hvals(key).map { |json| Gush::JSON.decode(json, symbolize_keys: true) }
    end

    workflow_from_hash(hash, nodes)
  else
    raise WorkflowNotFound.new("Workflow with given id doesn't exist")
  end
end

#next_free_job_id(workflow_id, job_klass) ⇒ Object 



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# File 'lib/gush/client.rb', line 58

def next_free_job_id(workflow_id, job_klass)
  job_id = nil

  loop do
    job_id = SecureRandom.uuid
    available = !redis.hexists("gush.jobs.#{workflow_id}.#{job_klass}", job_id)

    break if available
  end

  job_id
end

#next_free_workflow_id ⇒ Object 



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# File 'lib/gush/client.rb', line 71

def next_free_workflow_id
  id = nil
  loop do
    id = SecureRandom.uuid
    available = !redis.exists("gush.workflow.#{id}")

    break if available
  end

  id
end

#persist_job(workflow_id, job) ⇒ Object 



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# File 'lib/gush/client.rb', line 116

def persist_job(workflow_id, job)
  redis.hset("gush.jobs.#{workflow_id}.#{job.klass}", job.id, job.to_json)
end

#persist_workflow(workflow) ⇒ Object 



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# File 'lib/gush/client.rb', line 107

def persist_workflow(workflow)
  redis.set("gush.workflows.#{workflow.id}", workflow.to_json)

  workflow.jobs.each {|job| persist_job(workflow.id, job) }
  workflow.mark_as_persisted

  true
end

#start_workflow(workflow, job_names = []) ⇒ Object 



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# File 'lib/gush/client.rb', line 37

def start_workflow(workflow, job_names = [])
  workflow.mark_as_started
  persist_workflow(workflow)

  jobs = if job_names.empty?
           workflow.initial_jobs
         else
           job_names.map {|name| workflow.find_job(name) }
         end

  jobs.each do |job|
    enqueue_job(workflow.id, job)
  end
end

#stop_workflow(id) ⇒ Object 



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# File 'lib/gush/client.rb', line 52

def stop_workflow(id)
  workflow = find_workflow(id)
  workflow.mark_as_stopped
  persist_workflow(workflow)
end