The Xen Node.js Library by Pirlot Nicolas provides a module to interact with Citrix XenServer API, and is designed to let users make XML-RPC calls with Xen's API. The Xen API, or XAPI, gives developers tools and an interface for the remote management of virtualized guests running on a Xen-enabled host.
There’s no doubt that an application becomes exponentially more valuable as the number of data sources it connects to increases. The challenge is managing that process. While the rise of application programming interfaces that make it simpler to invoke another application has dramatically increased the usefulness of application software, trying to manually manage that process via a series of point-to-point connections winds up being overly cumbersome.
In theory the rise of software-defined networking is supposed to give rise to a new class of applications that will give developers more control over, for example, location-based services. In actual practice no one is quite certain how developer will invoke SDN capabilities, but the folks at Hewlett-Packard are anxious to find out.
One of the key benefits that the cloud brings to developers is the promise of reducing the cost of hosting applications. "Pay per use" is mentioned by every cloud vendor, but that by itself is not a magic wand by which the bills get reduced. A typical pattern is to observe monthly bills, see which services ended up being costly, then look at re-architecting bits and pieces of the application. Google Cloud Platform, which is fast becoming a strong alternative to Amazon Web Services, wants to make the task easier by providing a billing API that provides programmatic access to your daily Google Cloud Platform usage and cost estimates.