Class: VCAP::Services::Base::AsyncJob::Snapshot::BaseCreateSnapshotJob

Inherits:
SnapshotJob show all
Defined in:
lib/base/job/snapshot.rb

Constant Summary

Constants included from VCAP::Services::Base::AsyncJob::Snapshot

FILTER_KEYS, MAX_NAME_LENGTH, SNAPSHOT_ID, SNAPSHOT_KEY_PREFIX

Instance Attribute Summary

Attributes inherited from SnapshotJob

#name, #snapshot_id

Instance Method Summary collapse

Methods inherited from SnapshotJob

#cleanup, #create_lock, #fmt_error, #get_dump_path, #handle_error, #init_worker_logger, #initialize, #parse_config, queue_lookup_key, #required_options, select_queue

Methods included from VCAP::Services::Base::AsyncJob::Snapshot

#client, #delete_snapshot, #filter_keys, #fmt_time, #new_snapshot_id, redis_connect, redis_init, #save_snapshot, #service_snapshots, #service_snapshots_count, #snapshot_details, #snapshot_filepath, #update_name

Methods included from Error

#failure, #internal_fail, #parse_msg, #success, #timeout_fail

Constructor Details

This class inherits a constructor from VCAP::Services::Base::AsyncJob::Snapshot::SnapshotJob

Instance Method Details

#perform ⇒ Object

workflow template Sub class should implement execute method which returns hash represents of snapshot like: => 1,

:size => 100,
:files => ["my_snapshot.tgz", "readme.txt"]
:manifest => {:version => '1', :service => 'mysql'
}



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# File 'lib/base/job/snapshot.rb', line 220

def perform
  begin
    required_options :service_id
    @name = options["service_id"]
    @metadata = VCAP.symbolize_keys(options["metadata"])
    @logger.info("Launch job: #{self.class} for #{name} with metadata: #{@metadata}")

    @snapshot_id = new_snapshot_id
    lock = create_lock

    @snapshot_files = []
    lock.lock do
      quota = @config["snapshot_quota"]
      if quota
        current = service_snapshots_count(name)
        @logger.debug("Current snapshots count for #{name}: #{current}, max: #{quota}")
        raise ServiceError.new(ServiceError::OVER_QUOTA, name, current, quota) if current >= quota
      end

      snapshot = execute
      snapshot = VCAP.symbolize_keys snapshot
      snapshot[:manifest] ||= {}
      snapshot[:manifest].merge! @metadata
      @logger.info("Results of create snapshot: #{snapshot.inspect}")

      # pack snapshot_file into package
      dump_path = get_dump_path(name, snapshot_id)
      FileUtils.mkdir_p(dump_path)
      package_file = "#{snapshot_id}.zip"

      package = Package.new(File.join(dump_path, package_file))
      package.manifest = snapshot[:manifest]
      files = Array(snapshot[:files])
      raise "No snapshot file to package." if files.empty?
      files.each do |f|
        full_path = File.join(dump_path, f)
        @snapshot_files << full_path
        package.add_files full_path
      end
      package.pack(dump_path)
      @logger.info("Package snapshot file: #{File.join(dump_path, package_file)}")

      # update snapshot metadata for package file
      snapshot.delete(:files)
      snapshot[:file] = package_file
      snapshot[:date] = fmt_time
      # add default service name
      snapshot[:name] = "Snapshot #{snapshot[:date]}"

      save_snapshot(name, snapshot)

      completed(Yajl::Encoder.encode(filter_keys(snapshot)))
      @logger.info("Complete job: #{self.class} for #{name}")
    end
  rescue => e
    cleanup(name, snapshot_id)
    handle_error(e)
  ensure
    set_status({:complete_time => Time.now.to_s})
    @snapshot_files.each{|f| File.delete(f) if File.exists? f} if @snapshot_files
  end
end