The ChatSessionPreview
class is used to make multiturn send message requests. You can instantiate this class by using the startChat
method in the GenerativeModelPreview
class. The sendMessage
method makes an async call to get the response of a chat message at at once. The sendMessageStream
method makes an async call to stream the response of a chat message as it's being generated.
Package
@google-cloud/vertexaiConstructors
(constructor)(request, requestOptions)
constructor
(
request
:
StartChatSessionRequest
,
requestOptions
?:
RequestOptions
);
Constructs a new instance of the ChatSessionPreview
class
requestOptions
Properties
requestOptions
protected
readonly
requestOptions
?:
RequestOptions
;
Methods
getHistory()
getHistory
()
:
Promise<Content
[]>;
sendMessage(request)
sendMessage
(
request
:
string
|
Array<string
|
Part
> )
:
Promise<GenerateContentResult>
;
Makes an async call to send chat message.
The response is returned in GenerateContentResult.response .
const
chat
=
generativeModelPreview
.
startChat
();
const
result1
=
await
chat
.
sendMessage
(
"How can I learn more about Node.js?"
);
console
.
log
(
'Response: '
,
JSON
.
stringify
(
result1
.
response
));
const
result2
=
await
chat
.
sendMessage
(
"What about python?"
);
console
.
log
(
'Response: '
,
JSON
.
stringify
(
result2
.
response
));
sendMessageStream(request)
sendMessageStream
(
request
:
string
|
Array<string
|
Part
> )
:
Promise<StreamGenerateContentResult>
;
Makes an async call to stream send message.
The response is streamed chunk by chunk in StreamGenerateContentResult.stream . The aggregated response is avaliable in StreamGenerateContentResult.response after all chunks are returned.
Promise
< StreamGenerateContentResult
>
Promise of StreamGenerateContentResult .
const
chat
=
generativeModel
.
startChat
();
const
chatInput
=
"How can I learn more about Node.js?"
;
const
result
=
await
chat
.
sendMessageStream
(
chatInput
);
for
await
(
const
item
of
result
.
stream
)
{
console
.
log
(
item
.
candidates
[
0
].
content
.
parts
[
0
].
text
);
}
const
response
=
await
result
.
response
;
console
.
log
(
'aggregated response: '
,
JSON
.
stringify
(
result
.
response
));
