[basics] Make properties and service discovery contextualized
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Key: LABS-365
URL: https://issues.apache.org/jira/browse/LABS-365
Project: Labs
Issue Type: New Feature
Components: Magma
Affects Versions: Current
Reporter: Simone Gianni
Fix For: Future
Currently i18n files are much like plain java property files, except that they
are parsed based on an execution context, so that the same key can be
translated differently in different contexts.
The same system could be used also for other parts of the system where property
files are used, which are only two :
- Settings
- Services (converters and formatters)
The problem with contextualization is a problem of caching. For example, right
now, properties are used for database configuration, so right now the first
time the database is accessed the whole database infrastructure is loaded
(connections created, pooling, jndi whatever it is), and then reused for
subseguent connections. If these properties were contextualized, it would be
possible to define different database settings for different parts of the
system (like for example, a different database for a certain package). While
this is rarely useful, it is a good example of which kind of problems this
improvement could cause : every connection would have to be created depending
on the context, potentially leading to a great performance issue. So a smarter
caching and reuse system will have to be implemented.
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