Amardeep Bhattal created ARIES-929:
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Summary: install subsystems from IDirectory objects
Key: ARIES-929
URL: https://issues.apache.org/jira/browse/ARIES-929
Project: Aries
Issue Type: Improvement
Components: Subsystem
Affects Versions: 0.4
Environment: n/a
Reporter: Amardeep Bhattal
Fix For: 0.4
Subsystems may be installed by calling Subsystem.install(String) (and also the
install(String, InputStream) method). The code treats the given location string
as a url string which can be opened to obtain installation artifacts, unless
the uri has a scheme of "subsystem" in which case an alternative leg of code is
executed to install a persisted subsystem.
It would be useful to extend this mechanism to add a new scheme ("idirfinder")
which is also treated in special way; in this case the URI is passed to a
service which can return a corresponding IDirectory object that matches the
given URI, and then installs a subsystem using the contents of the IDirectory.
To achieve this, a modification to the subsystem install code is required
(though not extensive as IDirectory objects are already used internally during
install), and an interface for the IDirectory finder service must be defined.
Adding this functionality would allow installation of subsystems from a variety
of sources, including expanded archive, loose config (installation artifacts
distributed across disk as produced by IDEs), in-memory etc as the only
requirement is then to provide an IDirectory front-end to the content. The
alternative of gathering the content and producing an archive file is not
desirable due to the overhead this entails, particularly when an IDE is being
used for rapid development, and small changes are being made frequently.
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