ServiceHandshake (starrocks-bdb-je 18.3.17 API)

```
public class ServiceHandshake
extends Object
```
Provides Dispatcher service handshake logic, including identification of the service to be accessed and authentication for access to the service. The service initialization protocol looks like one of these flows. In the flows, the notation byte(X) indicates that X is a 1-byte network field and 2byte(X) indicates that X is a 2-byte network field. If No authentication is configured: Client Dispatcher -> "Service:" + byte(len) + <service name> <- byte(OK|BUSY|UNKNOWN_SERVICE) If authentication is configured: Client Dispatcher -> "Service:" + byte(len) + <service name> <- byte(AUTHENTICATE) -> "Authenticate:" + byte(<len>) + <mechanism list> <- "Mechanism:" + 2byte(<len>) + <server-selected mech name> + ":" + <auth mech params> -> <Mechanism-specific payload> <- byte(OK|BUSY|UNKNOWN_SERVICE|INVALID) The code here is organized into client-side and server-side functions. Client-side code is presumed to operated in blocking mode and server-side code is presumed to operate in non-blocking mode.

Nested Classes
Modifier and Type	Class and Description
`static interface`	`ServiceHandshake.AuthenticationMethod` The base of all authentication implementations.
`static class`	`ServiceHandshake.ClientHandshake` Client-side handshake state
`static class`	`ServiceHandshake.ClientInitOp` The base class of elemental service initialization protocol operations for the client side.
`static class`	`ServiceHandshake.InitResult` Operation-level result indicator
`static interface`	`ServiceHandshake.IOAdapter` A simple interface providing simple blocking I/O.
`static class`	`ServiceHandshake.ServerHandshake` Server-side handshake state
`static class`	`ServiceHandshake.ServerInitOp` The base class of elemental service initialization protocol operations for the server side.

Fields
Modifier and Type	Field and Description
`static int`	`SERVICE_NAME_LIMIT` The maximum length of a service name

Constructors
Constructor and Description
`ServiceHandshake()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Class ServiceHandshake