Re: [maven-and-scala] Error when compile a Probuf generated java file

[David Bernard]

Do you have several Builder class into your project ?

Can you share the code of generated myResponseProtocol.java and ServiceStats ?

On Thu, Mar 28, 2013 at 8:19 AM, mmLiu <diveinto...@gmail.com> wrote:

In my project, I have code both in Java and Scala.

while when I try to package my project(using twitter's sbt-package-dist ), Error occurred:

[error] /path/to/my/project/src/main/java/com/mycompany/dp/my/protocol/myResponseProtocol.java:458: reference to Builder is ambiguous;
[error] it is both defined in object myResponse and imported subsequently by
[error] import ServiceStats._
[error]       public Builder newBuilderForType() { return newBuilder(); }
[error]              ^
[error] /path/to/my/project/src/main/java/com/mycompany/dp/my/protocol/myResponseProtocol.java:462: reference to Builder is ambiguous;
[error] it is both defined in object myResponse and imported subsequently by
[error] import ServiceStats._
[error]       public Builder toBuilder() { return newBuilder(this); }
[error]              ^
[error] /path/to/my/project/src/main/java/com/mycompany/dp/my/protocol/myRequestProtocol.java:321: reference to Builder is ambiguous;
[error] it is both defined in object myRequest and imported subsequently by
[error] import RawDeviceInfo._
[error]       public Builder newBuilderForType() { return newBuilder(); }
[error]              ^
[error] /path/to/my/project/src/main/java/com/mycompany/dp/my/protocol/myRequestProtocol.java:325: reference to Builder is ambiguous;
[error] it is both defined in object myRequest and imported subsequently by
[error] import RawDeviceInfo._
[error]       public Builder toBuilder() { return newBuilder(this); }
[error]              ^

myResponseProtocol.java and myRequestProtocol.java are java classes generated using Probuf, the .probuf file looks like this(quit normal):

package com.umeng.dp.my.protocol;
// FATAL: This name works as a version number
// Increase this number everytime you do a non-compatible modification!!
// The block storage writer is responsible for write the version number.
option java_outer_classname = "myResponseProtocol";
message myResponse {
    optional uint64 request_id = 1;
    optional string my = 2;
    enum StatusCode {
        NORMAL = 0;
        DB_FAIL = 1;
        INVALID = 2;
    }
    optional StatusCode status_code = 3;
    optional string error_message = 4;
    enum mySource {
        FID = 0;
        ...
    }
    optional mySource my_source = 5;
    message ServiceStats {
        optional uint32 db_latency_avg = 1;
        optional uint32 db_latency_max = 2;
        ...
        ...
    }
    optional ServiceStats service_stats = 6;

Any idea why this error happens?

ps. I search the web and find this email in this group: "ambiguous class errors when compiling a Maven project", seems we got the same issue,while no solution is provided in that thread. I

have checked the class file generated by Probuf, no  import ServiceStats._ or import ServiceStats.* shown up.

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