Async example to Generate content with Multimodal AI Model

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "google.golang.org/genai" 
 ) 
 // generateWithTextAsyncStream shows how to stream a text generation response. 
 func 
  
 generateWithTextAsyncStream 
 ( 
 w 
  
 io 
 . 
 Writer 
 ) 
  
 error 
  
 { 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 genai 
 . 
 NewClient 
 ( 
 ctx 
 , 
  
& genai 
 . 
 ClientConfig 
 { 
  
 HTTPOptions 
 : 
  
 genai 
 . 
 HTTPOptions 
 { 
 APIVersion 
 : 
  
 "v1" 
 }, 
  
 }) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "failed to create genai client: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 modelName 
  
 := 
  
 "gemini-2.5-flash" 
  
 contents 
  
 := 
  
 [] 
 * 
 genai 
 . 
 Content 
 { 
  
 { 
  
 Role 
 : 
  
 "user" 
 , 
  
 Parts 
 : 
  
 [] 
 * 
 genai 
 . 
 Part 
 { 
  
 { 
 Text 
 : 
  
 "Compose a song about the adventures of a time-traveling squirrel." 
 }, 
  
 }, 
  
 }, 
  
 } 
  
 for 
  
 resp 
 , 
  
 err 
  
 := 
  
 range 
  
 client 
 . 
 Models 
 . 
 GenerateContentStream 
 ( 
 ctx 
 , 
  
 modelName 
 , 
  
 contents 
 , 
  
& genai 
 . 
 GenerateContentConfig 
 { 
  
 ResponseModalities 
 : 
  
 [] 
 string 
 { 
 "TEXT" 
 }}) 
  
 { 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "failed to generate content: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 chunk 
  
 := 
  
 resp 
 . 
 Text 
 () 
  
 fmt 
 . 
 Fprintln 
 ( 
 w 
 , 
  
 chunk 
 ) 
  
 } 
  
 // Example output (streamed piece by piece): 
  
 // (Verse 1) 
  
 // Pip was a squirrel, a regular chap, 
  
 //Burying acorns, enjoying a nap. 
  
 //One sunny morning, beneath the old pine, 
  
 //He dug up a thing, incredibly fine. 
  
 //A tiny contraption, with gears and a gleam, 
  
 //It pulsed with a power, a 
  
 // time-traveling dream. 
  
 //He nudged it with curiosity, twitching his nose, 
  
 //And *poof!* went the world, as everyone knows... 
  
 // 
  
 //(Chorus) 
  
 //Oh, Pip the squirrel, with his bushy brown tail, 
  
 //Through the time stream he'd often sail! 
  
 // ... 
  
 return 
  
 nil 
 } 
 

  import 
  
 com.google.genai.Client 
 ; 
 import 
  
 com.google.genai.types.GenerateContentResponse 
 ; 
 import 
  
 com.google.genai.types.HttpOptions 
 ; 
 import 
  
 java.util.concurrent.CompletableFuture 
 ; 
 public 
  
 class 
 TextGenerationAsyncWithText 
  
 { 
  
 public 
  
 static 
  
 void 
  
 main 
 ( 
 String 
 [] 
  
 args 
 ) 
  
 { 
  
 // TODO(developer): Replace these variables before running the sample. 
  
 String 
  
 modelId 
  
 = 
  
 "gemini-2.5-flash" 
 ; 
  
 generateContent 
 ( 
 modelId 
 ); 
  
 } 
  
 // Generates text asynchronously with text input 
  
 public 
  
 static 
  
 String 
  
 generateContent 
 ( 
 String 
  
 modelId 
 ) 
  
 { 
  
 // Initialize client that will be used to send requests. This client only needs to be created 
  
 // once, and can be reused for multiple requests. 
  
 try 
  
 ( 
 Client 
  
 client 
  
 = 
  
 Client 
 . 
 builder 
 () 
  
 . 
 location 
 ( 
 "global" 
 ) 
  
 . 
 vertexAI 
 ( 
 true 
 ) 
  
 . 
 httpOptions 
 ( 
 HttpOptions 
 . 
 builder 
 (). 
 apiVersion 
 ( 
 "v1" 
 ). 
 build 
 ()) 
  
 . 
 build 
 ()) 
  
 { 
  
 CompletableFuture<GenerateContentResponse> 
  
 asyncResponse 
  
 = 
  
 client 
 . 
 async 
 . 
 models 
 . 
 generateContent 
 ( 
  
 modelId 
 , 
  
 "Compose a song about the adventures of a time-traveling squirrel." 
 , 
  
 null 
 ); 
  
 String 
  
 response 
  
 = 
  
 asyncResponse 
 . 
 join 
 (). 
 text 
 (); 
  
 System 
 . 
 out 
 . 
 print 
 ( 
 response 
 ); 
  
 // Example response: 
  
 // (Verse 1) 
  
 // In an oak tree, so leafy and green, 
  
 // Lived Squeaky the squirrel, a critter unseen. 
  
 // Just burying nuts, a routine so grand, 
  
 // ... 
  
 return 
  
 response 
 ; 
  
 } 
  
 } 
 } 
 

  from 
  
 google 
  
 import 
 genai 
 from 
  
 google.genai.types 
  
 import 
 GenerateContentConfig 
 , 
 HttpOptions 
 client 
 = 
 genai 
 . 
 Client 
 ( 
 http_options 
 = 
 HttpOptions 
 ( 
 api_version 
 = 
 "v1" 
 )) 
 model_id 
 = 
 "gemini-2.5-flash" 
 response 
 = 
 await 
 client 
 . 
 aio 
 . 
 models 
 . 
 generate_content 
 ( 
 model 
 = 
 model_id 
 , 
 contents 
 = 
 "Compose a song about the adventures of a time-traveling squirrel." 
 , 
 config 
 = 
 GenerateContentConfig 
 ( 
 response_modalities 
 = 
 [ 
 "TEXT" 
 ], 
 ), 
 ) 
 print 
 ( 
 response 
 . 
 text 
 ) 
 # Example response: 
 # (Verse 1) 
 # Sammy the squirrel, a furry little friend 
 # Had a knack for adventure, beyond all comprehend