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Environment

Windows

EventMesh version

master

What happened

CloudEvents variable names do not support underscores。

How to reproduce

    public static void main(String[] args) {
        CloudEvent.Builder builder = CloudEvent.newBuilder().setId(RandomStringUtils.generateUUID()).setSpecVersion("1.0")
            .putAttributes(ProtocolKey.GRPC_RESPONSE_CODE, CloudEventAttributeValue.newBuilder().setCeString("").build())
            .putAttributes(ProtocolKey.GRPC_RESPONSE_MESSAGE,
                CloudEventAttributeValue.newBuilder().setCeString("").build())
            .putAttributes(ProtocolKey.GRPC_RESPONSE_TIME, CloudEventAttributeValue.newBuilder()
                .setCeTimestamp(Timestamp.newBuilder().setSeconds(1).build()).build());
        final io.cloudevents.CloudEvent cloudEvent = switchEventMeshCloudEvent2CloudEvent(builder.build());
    }

Debug logs

Exception in thread "main" io.cloudevents.rw.CloudEventRWException: Invalid extensions name: status_code
at io.cloudevents.rw.CloudEventRWException.newInvalidExtensionName(CloudEventRWException.java:122)
at io.cloudevents.core.impl.BaseCloudEventBuilder.withExtension(BaseCloudEventBuilder.java:121)
at io.cloudevents.core.v1.CloudEventBuilder.withContextAttribute(CloudEventBuilder.java:176)
at io.cloudevents.protobuf.ProtoDeserializer.read(ProtoDeserializer.java:73)
at io.cloudevents.rw.CloudEventReader.read(CloudEventReader.java:43)
at io.cloudevents.protobuf.ProtobufFormat.deserialize(ProtobufFormat.java:64)
at io.cloudevents.core.format.EventFormat.deserialize(EventFormat.java:56)
at org.apache.eventmesh.client.grpc.util.EventMeshCloudEventBuilder.switchEventMeshCloudEvent2CloudEvent(EventMeshCloudEventBuilder.java:272)
at org.apache.eventmesh.client.grpc.util.EventMeshCloudEventBuilder.main(EventMeshCloudEventBuilder.java:294)

Are you willing to submit PR?

• Yes I am willing to submit a PR!

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