Make ProtoSerializer accessible

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技术栈
java
领域
api

调研方向

首先定位 issue 中提到的包级私有 ProtoSerializer 和 ProtoDeserializer 类,以及 ProtobufFormat 入口点。在保留现有 toProto 和反序列化行为的同时,使两个序列化器可供使用者访问。验证调用方可以在 CloudEvent 和 io.cloudevents.v1.proto.CloudEvent 之间直接转换,无需中间的字节数组转换。

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描述

We use the io.cloudevents:cloudevents-protobuf:4.0.1 lib to serialize and deserialize CloudEvents as protobuf messages. Unfortunately, there is no direct access to the ProtoSerializer and ProtoDeserializer classes. For our use case it would be very helpful if we could convert a io.cloudevents.CloudEvent into a io.cloudevents.v1.proto.CloudEvent protobuf message. Which is basically what the toProto method in ProtoSerializer does.

class ProtoSerializer {  // <--- Can we make this class public?
    public static CloudEvent toProto(io.cloudevents.CloudEvent ce) throws InvalidProtocolBufferException {
        // ...
    }

    // ...
}

Unfortunately, this method is not accessible to consuming methods as the class is package-local, which does not allow us to call it from outside the io.cloudevents.protobuf package.

Currently, we can only use the ProtobufFormat to convert a CloudEvent to a byte[] which we can then decode as io.cloudevents.v1.proto.CloudEvent. This involves an unnecessary extra conversion step.

io.cloudevents.v1.proto.CloudEvent.parseFrom(new ProtobufFormat().serialize((io.cloudevents.CloudEvent) cloudEvent))

For symmetry reasons ProtoDeserializer should likely also be made public.

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Java
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