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EE 7 Server). Anyway, from the customers' point of view, it's quite positive to have mul-
tiple options such as the three available ESBs. Out of the three, we have discussed OSB
and OpenESB (refer to
http://www.open-esb.net/
, the Sun Microsystems and Seebeyond
products, for more information on OpenESB). We will soon come to the third ESB.
Another strategic benefit of this acquisition is the availability of advanced hardware, cap-
able of hosting the preconfigured complex Fusion solutions (both DB and MW). Cluster-
ing highly reusable Canonical software components logically leads to the implementation
of the scalable Canonical Resource (hardware, infrastructure) pattern. Oracle responded to
that with the Exadata and Exalogic combined solutions based on Sun machines (engin-
eered systems) running on Oracle Linux. There are some debates regarding the elasticity
of the
HW + SW
bundled approach and how it suits the public cloud. Clearly, this
plat-
form as a service
(
PaaS
) solution is optimal for private and hybrid clouds, providing ho-
rizontal scaling, dynamic resource provisioning (with some limitations), and cloud burst-
in and burst-out. Some of these challenges can be solved by inner-cloud load balancing
and functional decomposition between the clouds. The fourth most critical cloud charac-
teristic is
Multitenant Access
, which requires complex security measures and is also ad-
dressed in Oracle's Fusion roadmap.
In 2011, Oracle announced its strategic partnership with Vordel (now part of Axway), and
the Oracle Enterprise Service Gateway product launched as a rebranded Vordel API Gate-
way. Today, it's also called Oracle API Gateway. Nevertheless, with the best-of-breed Se-
cure Gateway, Oracle finally introduced a comprehensive security layer essential for any
cloud model. As with most Service Gateways, the API Gateway is essentially an ESB,
consolidating all common features for the service bus SOA patterns. Thus, now we have
three full-fledged ESBs in the Oracle technology stack and something to choose from.
Cloud patterns and technologies are not the primary aims of this topic, but to add some
silver lining to emerging clouds, we could mention some of Oracle's other initiatives,
again expressed via acquisitions, addressing both SOA and the cloud. For example, the
quite recent (2013) acquisition of Nimbula—provider of the private cloud infrastructure
management software; capable of managing the infrastructure resources of services deliv-
ery, quality, and availability; as well as workloads in private and hybrid cloud environ-
ments. It seems to be a perfect addition to the Oracle cloud-based Sun hardware resources.
It would not be entirely correct to state that all Oracle Fusion roadmap's milestones were
based on acquisitions. Oracle primarily adopted
JavaServer Faces
(
JSF
) with lots of oth-
er JEE standards and patterns and came up with
Application Development Framework
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