dropRole()
MilvusClient interface. This method drops a role. It will succeed if the role exists, otherwise fail.
R<RpcStatus> dropRole(DropRoleParam requestParam);
DropRoleParam
Use the DropRoleParam.Builder to construct a DropRoleParam object.
import io.milvus.param.DropRoleParam;
DropRoleParam.Builder builder = DropRoleParam.newBuilder();
Methods of DropRoleParam.Builder:
| Method | Description | Parameters | 
|---|---|---|
| withRoleName(String roleName) | Sets the roleName. RoleName cannot be empty or null. | roleName: The role name used to create the privilege. | 
| build() | Construct a DropRoleParam object. | N/A | 
The CreateRoleParam.Builder.build() can throw the following exceptions:
- ParamException: error if the parameter is invalid.
Returns
This method catches all the exceptions and returns an R<RpcStatus> object.
- If the API fails on the server side, it returns the error code and message from the server. 
- If the API fails by RPC exception, it returns - R.Status.Unknownand error message of the exception.
- If the API succeeds, it returns - R.Status.Success.
Example
import io.milvus.param.DropRoleParam;
R<RpcStatus> response = client.dropRole(DropRoleParam.newBuilder()
            .withRoleName(roleName)
            .build());
if (response.getStatus() != R.Status.Success.getCode()) {
    throw new RuntimeException(response.getMessage());
}