Debug fetch_multi leaks

Author: drinkbeer

lib/identity_cache.rb

@@ -116,6 +116,7 @@ def should_fill_cache? # :nodoc:
     end
 
     def should_use_cache? # :nodoc:
+      puts " ===> in identity_cache.rb should_use_cache? "
       ActiveRecord::Base.connection_handler.connection_pool_list(ActiveRecord::Base.current_role).none? do |pool|
         pool.active_connection? &&
           # Rails wraps each of your tests in a transaction, so that any changes

lib/identity_cache/cache_fetcher.rb

@@ -67,6 +67,33 @@ def clear
     def fetch_multi(keys, &block)
       results = cas_multi(keys, &block)
       results = add_multi(keys, &block) if results.nil?
+
+      # binding.pry
+
+      def do_division_by_zero; 5 / 0; end
+      # begin
+      #   do_division_by_zero
+      # rescue => exception
+      #   puts "catch_fetcher - caught the division_by_zero exception in fetch_multi method"
+      #   puts exception.backtrace
+      #   # raise # always reraise
+      # end
+
+      keys.each do |k|
+        puts "CacheFetcher - Found Product key: #{k}" if k.include?(":blob:Product:")
+
+        if k.include?(":blob:Product:")
+          binding.pry
+          # begin
+          #   do_division_by_zero
+          # rescue => exception
+          #   puts "CacheFetcher - caught the Product key :blob:Product: with exceptions in fetch_multi method"
+          #   puts exception.backtrace
+          #   # raise # always reraise
+          # end
+        end
+
+      end
       results
     end
 

lib/identity_cache/cache_key_loader.rb

@@ -28,6 +28,17 @@ class << self
       def load(cache_fetcher, db_key, cache_fetcher_options = {})
         cache_key = cache_fetcher.cache_key(db_key)
 
+        if k.include?(":blob:Product:")
+          binding.pry
+          # begin
+          #   do_division_by_zero
+          # rescue => exception
+          #   puts "CacheFetcher - caught the Product key :blob:Product: with exceptions in fetch_multi method"
+          #   puts exception.backtrace
+          #   # raise # always reraise
+          # end
+        end
+
         db_value = nil
 
         cache_value = IdentityCache.fetch(cache_key, cache_fetcher_options) do

lib/identity_cache/fallback_fetcher.rb

@@ -22,6 +22,17 @@ def clear
 
     def fetch_multi(keys)
       results = @cache_backend.read_multi(*keys)
+
+      # binding.pry
+      def do_division_by_zero; 5 / 0; end
+      begin
+        do_division_by_zero
+      rescue => exception
+        puts "catch_fetcher - caught the division_by_zero exception in fetch_multi method"
+        puts exception.backtrace
+        # raise # always reraise
+      end
+
       missed_keys = keys - results.keys
       unless missed_keys.empty?
         replacement_results = yield missed_keys

lib/identity_cache/memoized_cache_proxy.rb

@@ -106,6 +106,10 @@ def fetch_multi(*keys)
       result = ActiveSupport::Notifications.instrument("cache_fetch_multi.identity_cache") do |payload|
         payload[:resolve_miss_time] = 0.0
 
+        keys.each do |k|
+          puts "MemoizedCacheProxy - Found Product key: #{k}" if k.include?(":blob:Product:")
+        end
+
         result = fetch_multi_memoized(keys) do |non_memoized_keys|
           memo_miss_keys = non_memoized_keys
           @cache_fetcher.fetch_multi(non_memoized_keys) do |missing_keys|