How do I use the RetrieveAndGenerate API to reuse a knowledge base session in Amazon Bedrock?

Resolution

A knowledge base session lasts 24 hours. You can't extend the session, and you can't reactivate a session after it expires. However, within the 24-hour window, you can provide the same session ID in the next API call input to reuse the session. If you don't include a session ID, then you automatically create a new session.

To reuse the same knowledge base session, call the RetrieveAndGenerate API and note the sessionId from the API call's response.

Example output:

{  
   "citations": [   
      {   
         "generatedResponsePart": {   
            "textResponsePart": {   
               "span": {   
                  "end": number,  
                  "start": number  
               },  
               "text": "string"  
            }  
         },  
         "retrievedReferences": [   
            {   
               "content": {   
                  "text": "string"  
               },  
               "location": {   
                  "s3Location": {   
                     "uri": "string"  
                  },  
                  "type": "string"  
               },  
               "metadata": {   
                  "string" : JSON value   
               }  
            }  
         ]  
      }  
   ],  
   "output": {   
      "text": "string"  
   },  
   "sessionId": "string"  
}

To assign the specified session ID to the current knowledge base session, call the RetrieveAndGenerate API to pass on the sessionId within 24 hours.

Note: The knowledge base remembers your previous conversation and provides the answers.

Example API call:

{
   "input": { 
      "text": "string"
   },
   "retrieveAndGenerateConfiguration": { 
      "knowledgeBaseConfiguration": { 
         "knowledgeBaseId": "string",
         "modelArn": "string"
      },
      "type": "KNOWLEDGE_BASE"
   },
   "sessionConfiguration": { 
      "kmsKeyArn": "string"
   },
   "sessionId": "string"
}