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copied!<p>Mule is quite simple to use in terms of plugging services together with XML and they have plenty of video examples which I found really helpful.</p> <p>ESBs are supposed to be future and as you say - yours does seem like a textbook example of where to use it.</p> <p>I'll try to answer all your questions:</p> <p><strong>Is it worth trying to pull in one of these options?</strong> I think this is a question you need to ask yourself - what are you trying to achieve? if you're trying to make it easier to implement it will probably take the same time via pure code or ESB what with all the setup included. If you're thinking of doing it as a learning exercise it may be worthwhile.</p> <p><strong>Is there an easy way of integrating them into an existing app without completely restructuring it?</strong> Short answer no. You will require some re-engineering to integrate with most third-party libraries/frameworks.</p> <p><strong>Are there other, lighter weight options?</strong> Mule is quite simple really. You might be able to use an MQ to do the HTTP, SMS and IM. Possibly ActiveMQ or RabbitMQ.</p> <p><strong>Are there some aspects that I should consider that would make their use worthwhile?</strong> Yes, ESBs are designed for enterprises where new services are added often and the configuration is likely to change. Having it all in XML makes this change a bit easier. So if you are just building a one-off piece of software it might not be the right way to go. But if you will be adding more later and constantly connecting different services it may be the best route.</p>

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