| requestId | The request ID. It's 0 for one-way requests. |
| connection | The connection that received the request. It's nullptr for collocated invocations. |
| adapter | The object adapter to set in Current. |
| inputStream | The input stream buffer over the incoming Ice protocol request message. The stream is positioned at the beginning of the request header - the next data to read is the identity of the target. |
| requestCount | The number of requests remaining in inputStream. This value is always 1 for non-batched requests. |