adds lock ttl and lock_release_removes_key

lib/suo/client/base.rb

@@ -5,7 +5,9 @@ module Suo
         acquisition_timeout: 0.1,
         acquisition_delay: 0.01,
         stale_lock_expiration: 3600,
-        resources: 1
+        resources: 1,
+        lock_release_removes_key: false,
+        ttl: nil,
       }.freeze
 
       BLANK_STR = "".freeze
@@ -81,8 +83,13 @@ module Suo
           acquisition_lock = remove_lock(cleared_locks, token)
 
           break unless acquisition_lock
+
+          if @options[:lock_release_removes_key] && cleared_locks.empty?
+            break if clear
+          else
             break if set(serialize_locks(cleared_locks), cas)
           end
+        end
       rescue LockClientError => _ # rubocop:disable Lint/HandleExceptions
         # ignore - assume success due to optimistic locking
       end

lib/suo/client/memcached.rb

@@ -17,8 +17,12 @@ module Suo
       end
 
       def set(newval, cas)
+        if @options[:ttl]
+          @client.set_cas(@key, newval, cas, {ttl:  @options[:ttl]})
+        else
           @client.set_cas(@key, newval, cas)
         end
+      end
 
       def initial_set(val = BLANK_STR)
         @client.set(@key, val)

lib/suo/client/redis.rb

@@ -20,8 +20,12 @@ module Suo
 
       def set(newval, _)
         ret = @client.multi do |multi|
+          if @options[:ttl]
+            multi.setex(@key, @options[:ttl], newval)
+          else
             multi.set(@key, newval)
           end
+        end
 
         ret && ret[0] == OK_STR
       end