Class: LaunchDarkly::Impl::BigSegmentStoreManager Private

Inherits:
Object
  • Object
show all
Defined in:
lib/ldclient-rb/impl/big_segments.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0

Constant Summary collapse

EMPTY_MEMBERSHIP =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

use this as a singleton whenever a membership query returns nil; it's safe to reuse it because we will never modify the membership properties after they're queried

Since:

  • 5.5.0

{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(big_segments_config, logger) ⇒ BigSegmentStoreManager

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of BigSegmentStoreManager.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 18

def initialize(big_segments_config, logger)
  @store = big_segments_config.store
  @stale_after_millis = big_segments_config.stale_after * 1000
  @status_provider = BigSegmentStoreStatusProviderImpl.new(-> { get_status })
  @logger = logger
  @last_status = nil

  unless @store.nil?
    @cache = ExpiringCache.new(big_segments_config.context_cache_size, big_segments_config.context_cache_time)
    @poll_worker = RepeatingTask.new(big_segments_config.status_poll_interval, 0, -> { poll_store_and_update_status }, logger, 'LD/BigSegments#status')
    @poll_worker.start
  end
end

Instance Attribute Details

#status_provider ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 32

def status_provider
  @status_provider
end

Class Method Details

.hash_for_context_key(context_key) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 83

def self.hash_for_context_key(context_key)
  Digest::SHA256.base64digest(context_key)
end

Instance Method Details

#get_context_membership(context_key) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 39

def get_context_membership(context_key)
  return nil unless @store
  membership = @cache[context_key]
  unless membership
    begin
      membership = @store.get_membership(BigSegmentStoreManager.hash_for_context_key(context_key))
      membership = EMPTY_MEMBERSHIP if membership.nil?
      @cache[context_key] = membership
    rescue => e
      Impl::Util.log_exception(@logger, "Big Segment store membership query returned error", e)
      return BigSegmentMembershipResult.new(nil, BigSegmentsStatus::STORE_ERROR)
    end
  end
  poll_store_and_update_status unless @last_status
  unless @last_status.available
    return BigSegmentMembershipResult.new(membership, BigSegmentsStatus::STORE_ERROR)
  end
  BigSegmentMembershipResult.new(membership, @last_status.stale ? BigSegmentsStatus::STALE : BigSegmentsStatus::HEALTHY)
end

#get_status ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 59

def get_status
  @last_status || poll_store_and_update_status
end

#poll_store_and_update_status ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 63

def poll_store_and_update_status
  new_status = Interfaces::BigSegmentStoreStatus.new(false, false) # default to "unavailable" if we don't get a new status below
  unless @store.nil?
    begin
      metadata = @store.get_metadata
      new_status = Interfaces::BigSegmentStoreStatus.new(true, !metadata || stale?(metadata.last_up_to_date))
    rescue => e
      Impl::Util.log_exception(@logger, "Big Segment store status query returned error", e)
    end
  end
  @last_status = new_status
  @status_provider.update_status(new_status)

  new_status
end

#stale?(timestamp) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean)

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 79

def stale?(timestamp)
  !timestamp || ((Impl::Util.current_time_millis - timestamp) >= @stale_after_millis)
end

#stop ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/big_segments.rb', line 34

def stop
  @poll_worker.stop unless @poll_worker.nil?
  @store.stop unless @store.nil?
end