[
https://issues.apache.org/jira/browse/AVRO-872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13082716#comment-13082716
]
Bill Graham commented on AVRO-872:
----------------------------------
It is possible to generate the Protocol at run time directly from an IDL file.
That way the Project can be generated and consumed without the extra step to
pre-generate an avpr file. Something like this works:
{code}
Idl parser = new Idl(idfFile);
Protocol p = parser.CompilationUnit();
{code}
The downside is that now the avro-compiler jar would be needed at run time. I
agree though that it would be nice to not have to create and use Protocols if
you only need Schemas.
@Doug if all your schema objects are defined in your avsc files, then defining
a dummy "record Foo" would be needed, right? Could you instead do something
like this to load a collection of Schemas instead?:
{noformat}
@namespace("foo.bar")
schema MySchema {
import schema "Bar.avsc";
...
}
{noformat}
Granted, now there's a dummy MySchema thing, but it's not a record.
> Allow interdependancies across IDL schema imports
> -------------------------------------------------
>
> Key: AVRO-872
> URL: https://issues.apache.org/jira/browse/AVRO-872
> Project: Avro
> Issue Type: Improvement
> Reporter: Bill Graham
> Assignee: Doug Cutting
> Attachments: AVRO-872.patch, AVRO-872.patch, AVRO-872.patch,
> AVRO-872_4.patch
>
>
> This currently doesn't work because Player depends on Position, but it should:
> {noformat}
> $ cat position.avsc
> {"type":"enum", "name": "Position", "namespace": "avro.examples.baseball",
> "symbols": ["P", "C", "B1", "B2", "B3", "SS", "LF", "CF", "RF", "DH"]
> }
> $ cat player.avsc
> {"type":"record", "name":"Player", "namespace": "avro.examples.baseball",
> "fields": [
> {"name": "number", "type": "int"},
> {"name": "first_name", "type": "string"},
> {"name": "last_name", "type": "string"},
> {"name": "position", "type": {"type": "array", "items":
> "avro.examples.baseball.Position"} }
> ]
> }
> $ cat baseball.avdl
> @namespace("avro.examples.baseball")
> protocol Baseball {
> import schema "position.avsc";
> import schema "player.avsc";
> }
> $ java -jar avro-tools-1.5.1.jar idl baseball.avdl baseball.avpr
> {noformat}
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
