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https://issues.apache.org/jira/browse/AVRO-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Norman Fung JP updated AVRO-1724:
---------------------------------
Attachment: (was: simpleTest.zip)
> avrogen.exe "import" handling
> -----------------------------
>
> Key: AVRO-1724
> URL: https://issues.apache.org/jira/browse/AVRO-1724
> Project: Avro
> Issue Type: Bug
> Components: csharp
> Reporter: Norman Fung JP
> Attachments: avro-csharp-1.7.7.tar.gz
>
>
> I have two simple JSON Schema in SAMEfolder:
> Content in "simpleA.avsc" as follows:
> {
> "namespace": "com.bearstearns",
> "type": "record",
> "name": "simpleA",
> "imports": ["simpleB.avsc"],
> "fields":
> [
> {"name":"appName","type":"string"},
> {"name":"userId","type":"string"},
>
> {"name":"nestedB","type":[{"type":"array","items":"simpleB"},"null"]}
> ]
> }
> Content in "simpleB.avsc" as follows:
> {"namespace": "com.bearstearns",
> "type": "record",
> "name": "simpleB",
> "fields":
> [
> {"name":"ID","type":"string"},
> {"name":"SimpleName","type":"string"}
> ]
> }
> Avrogen can be downloaded from
> http://apache.communilink.net/avro/avro-1.7.7/avro-csharp-1.7.7.tar.gz
> After download, from command prompt set PATH environment variable:
> set PATH=%PATH%;C:\...\avro\codegen\Release
> From Command Prompt,
> avrogen -s simpleA.avsc outputDir
> The error message is:
> "Exception occurred. Undefined name: simpleB"
> By the way, you cannot get around this by putting two schema in one file:
> Only one on top will be generated. The one in bottom won't. For example below
> if you put simpleB top, comma, then simpleA bottom. Only simpleB.cs will be
> generated (simpleA.cs won't)
> {"namespace": "com.bearstearns",
> "type": "record",
> "name": "simpleB",
> "fields":
> [
> {"name":"ID","type":"string"},
> {"name":"SimpleName","type":"string"}
> ]
> },
> {"namespace": "com.bearstearns",
> "type": "record",
> "name": "simpleA",
> "fields":
> [
> {"name":"appName","type":"string"},
> {"name":"userId","type":"string"},
>
> {"name":"nestedB","type":[{"type":"array","items":"simpleB"},"null"]}
> ]
> }
> However, a workaround is to nest simpleA and simpleB in same avsc - this will
> work:
> {
> "namespace": "com.bearstearns",
> "type": "record",
> "name": "simpleA",
> "fields":
> [
> {"name":"appName","type":"string"},
> {"name":"userId","type":"string"},
> {"name":"nestedB","type":{"type":"array","items":{
>
> "type": "record",
>
> "name": "simpleB",
>
> "fields":
>
> [
>
> {"name":"ID","type":"string"},
>
> {"name":"SimpleName","type":"string"}
>
> ]
>
> }
> }}
> ]
> }
> fyi, I also try using avrogen -p switch in combination with protocol file, no
> joy.
> For this method, I first define the protocol file "bearstearns.avdl"
> @namespace("com.bearstearns")
> protocol BearStearns {
> import schema "simpleA.avsc";
> import schema "simpleB.avsc";
> }
> Then from command prompt:
> avrogen -p bearstearns.avdl outputDir
> This time, the error message is,
> Exception occurred. Invalid JSON format: @namespace("com.bearstearns")
> protocol BearStearns {
> import schema "simpleA.avsc";
> import schema "simpleB.avsc";
> }
> Actually is Avro support for dotnet ready yet? Avro official doc for C# is
> completely empty: http://avro.apache.org/docs/current/api/csharp/index.html
> Their guys even created a ticket for this in DEC 2013.
> https://issues.apache.org/jira/browse/AVRO-1420
> As of August 2015, Avro doc for C# remains empty. And not much foot print in
> Internet (C# and Avro I meant).
> References:
> • Official: https://avro.apache.org/docs/1.7.7/index.html
> • Download utility avrogen.exe:
> http://apache.communilink.net/avro/avro-1.7.7/
> •
> http://www.tutorialspoint.com/avro/serialization_by_generating_class.htm
> •
> http://www.michael-noll.com/blog/2013/03/17/reading-and-writing-avro-files-from-the-command-line/
>
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