By Ry Crozier on Apr 1, 2021 12:34PM As hardware appliances reach end-of-life. Macquarie Group has shifted its event platform - used to exchange actions between parties and systems globally to enable a transaction - to run in the public cloud. In an event-driven architecture, an event is “a change in state, or an update, like an item being placed in a shopping cart on an e-commerce website”, according to AWS. For Macquarie, an event could be an interbank transfer or a stock trade, for example. An event broker - which is either middleware software, an appliance or a service - sits between event producers and consumers, routing the necessary event data between the parties to make the transaction go through.