GitHub user johnhofman opened a pull request:
https://github.com/apache/kafka/pull/1582
KAFKA-3910: Cyclic schema support in ConnectSchema and SchemaBuilder
This feature uses a FutureSchema as a placeholder to be resolved later.
Resolution is attempted whenever a ConnectSchema is constructed, it attempts to
resolve all its children (fields, keySchema, or valueSchema) and recurses until
the end of the tree.
A FutureSchema is resolved when it finds a parent schema that matches its
name, and optional flag. If a FutureSchema is accessed before being resolved,
it will throw a DataException.
The SchemaBuilder constructs a FutureSchema if a field is added with only a
type name.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/johnhofman/kafka cyclic
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/1582.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1582
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commit d932db4544cc2d20a46bf873fbd92f2c09450276
Author: John Hofman <johnhof...@users.noreply.github.com>
Date: 2016-06-30T20:04:19Z
Add FutureSchema to support cyclic schemas
commit 7d95c487d4a5bf3cb751deb98425e5123abb461b
Author: John Hofman <johnhof...@users.noreply.github.com>
Date: 2016-07-04T07:32:47Z
Fix resolution failure test
commit 09f1b47c238ff10f58681e44816f2ba39ed95166
Author: John Hofman <johnhof...@users.noreply.github.com>
Date: 2016-07-04T09:53:58Z
Move cyclic comparison resolution to FutureSchema
commit c1c632b51f80d81c29cb66a35c5aed867ad869e7
Author: John Hofman <johnhof...@users.noreply.github.com>
Date: 2016-07-04T11:26:35Z
Clean up unused tokens, minor spelling fixes
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