Early to mid 2000's a product I worked on had a messaging abstraction that you could use JMS, MQSeries, MSMQ, etc. We tried, really tried, to use JavaSpaces but

Early to mid 2000's a product I worked on had a messaging abstraction that you could use JMS, MQSeries, MSMQ, etc. We tried, really tried, to use JavaSpaces but it had no FIFO guarantee. You could theoretically add and get tuples and one could stay in the space for days. A non-starter for that.