def set_session(env, session_id, new_session, options)
expiry = options[:expire_after]
expiry = expiry.nil? ? 0 : expiry + 1
@mutex.lock if env['rack.multithread']
session = @pool.get(session_id) || {}
if options[:renew] or options[:drop]
@pool.delete session_id
return false if options[:drop]
session_id = generate_sid
@pool.add session_id, 0
end
old_session = new_session.instance_variable_get('@old') || {}
session = merge_sessions session_id, old_session, new_session, session
@pool.set session_id, session, expiry
return session_id
rescue MemCache::MemCacheError, Errno::ECONNREFUSED
warn "#{self} is unable to find server."
warn $!.inspect
return false
ensure
@mutex.unlock if env['rack.multithread']
end