工具（Tool）调用

import java.time.LocalDateTime;
import org.springframework.ai.tool.annotation.Tool;
import org.springframework.context.i18n.LocaleContextHolder;

class DateTimeTools {

    @Tool(description = "Get the current date and time in the user's timezone")
    String getCurrentDateTime() {
        return LocalDateTime.now().atZone(LocaleContextHolder.getTimeZone().toZoneId()).toString();
    }

}

ChatModel chatModel = ...

String response = ChatClient.create(chatModel)
        .prompt("What day is tomorrow?")
        .tools(new DateTimeTools())
        .call()
        .content();

System.out.println(response);

Tomorrow is 2015-10-21.

I am an AI and do not have access to real-time information. Please provide the current date so I can accurately determine what day tomorrow will be.

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import org.springframework.ai.tool.annotation.Tool;
import org.springframework.context.i18n.LocaleContextHolder;

class DateTimeTools {

    @Tool(description = "Get the current date and time in the user's timezone")
    String getCurrentDateTime() {
        return LocalDateTime.now().atZone(LocaleContextHolder.getTimeZone().toZoneId()).toString();
    }

    @Tool(description = "Set a user alarm for the given time, provided in ISO-8601 format")
    void setAlarm(String time) {
        LocalDateTime alarmTime = LocalDateTime.parse(time, DateTimeFormatter.ISO_DATE_TIME);
        System.out.println("Alarm set for " + alarmTime);
    }

}

ChatModel chatModel = ...

String response = ChatClient.create(chatModel)
        .prompt("Can you set an alarm 10 minutes from now?")
        .tools(new DateTimeTools())
        .call()
        .content();

System.out.println(response);

class DateTimeTools {

    @Tool(description = "Get the current date and time in the user's timezone")
    String getCurrentDateTime() {
        return LocalDateTime.now().atZone(LocaleContextHolder.getTimeZone().toZoneId()).toString();
    }

}

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import org.springframework.ai.tool.annotation.Tool;
import org.springframework.ai.tool.annotation.ToolParam;

class DateTimeTools {

    @Tool(description = "Set a user alarm for the given time")
    void setAlarm(@ToolParam(description = "Time in ISO-8601 format") String time) {
        LocalDateTime alarmTime = LocalDateTime.parse(time, DateTimeFormatter.ISO_DATE_TIME);
        System.out.println("Alarm set for " + alarmTime);
    }

}

class DateTimeTools {

    String getCurrentDateTime() {
        return LocalDateTime.now().atZone(LocaleContextHolder.getTimeZone().toZoneId()).toString();
    }

}

Method method = ReflectionUtils.findMethod(DateTimeTools.class, "getCurrentDateTime");
ToolCallback toolCallback = MethodToolCallback.builder()
    .toolDefinition(ToolDefinition.builder(method)
            .description("Get the current date and time in the user's timezone")
            .build())
    .toolMethod(method)
    .toolObject(new DateTimeTools())
    .build();

class DateTimeTools {

    static String getCurrentDateTime() {
        return LocalDateTime.now().atZone(LocaleContextHolder.getTimeZone().toZoneId()).toString();
    }

}

Method method = ReflectionUtils.findMethod(DateTimeTools.class, "getCurrentDateTime");
ToolCallback toolCallback = MethodToolCallback.builder()
    .toolDefinition(ToolDefinition.builder(method)
            .description("Get the current date and time in the user's timezone")
            .build())
    .toolMethod(method)
    .build();

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import org.springframework.ai.tool.annotation.ToolParam;

class DateTimeTools {

    void setAlarm(@ToolParam(description = "Time in ISO-8601 format") String time) {
        LocalDateTime alarmTime = LocalDateTime.parse(time, DateTimeFormatter.ISO_DATE_TIME);
        System.out.println("Alarm set for " + alarmTime);
    }

}

public class WeatherService implements Function<WeatherRequest, WeatherResponse> {
    public WeatherResponse apply(WeatherRequest request) {
        return new WeatherResponse(30.0, Unit.C);
    }
}

public enum Unit { C, F }
public record WeatherRequest(String location, Unit unit) {}
public record WeatherResponse(double temp, Unit unit) {}

ToolCallback toolCallback = FunctionToolCallback
    .builder("currentWeather", new WeatherService())
    .description("Get the weather in location")
    .inputType(WeatherRequest.class)
    .build();

@Configuration(proxyBeanMethods = false)
class WeatherTools {

    WeatherService weatherService = new WeatherService();

	@Bean
	@Description("Get the weather in location")
	Function<WeatherRequest, WeatherResponse> currentWeather() {
		return weatherService;
	}

}

record WeatherRequest(@ToolParam(description = "The name of a city or a country") String location, Unit unit) {}

@Configuration(proxyBeanMethods = false)
class WeatherTools {

    public static final String CURRENT_WEATHER_TOOL = "currentWeather";

	@Bean(CURRENT_WEATHER_TOOL)
	@Description("Get the weather in location")
	Function<WeatherRequest, WeatherResponse> currentWeather() {
		...
	}

}

public interface ToolCallback {

	/**
	 * Definition used by the AI model to determine when and how to call the tool.
	 */
	ToolDefinition getToolDefinition();

	/**
	 * Metadata providing additional information on how to handle the tool.
	 */
	ToolMetadata getToolMetadata();

    /**
	 * Execute tool with the given input and return the result to send back to the AI model.
	 */
	String call(String toolInput);

    /**
	 * Execute tool with the given input and context, and return the result to send back to the AI model.
	 */
	String call(String toolInput, ToolContext tooContext);

}

public interface ToolDefinition {

	/**
	 * The tool name. Unique within the tool set provided to a model.
	 */
	String name();

	/**
	 * The tool description, used by the AI model to determine what the tool does.
	 */
	String description();

	/**
	 * The schema of the parameters used to call the tool.
	 */
	String inputSchema();

}

ToolDefinition toolDefinition = ToolDefinition.builder()
    .name("currentWeather")
    .description("Get the weather in location")
    .inputSchema("""
        {
            "type": "object",
            "properties": {
                "location": {
                    "type": "string"
                },
                "unit": {
                    "type": "string",
                    "enum": ["C", "F"]
                }
            },
            "required": ["location", "unit"]
        }
    """)
    .build();

@FunctionalInterface
public interface ToolCallResultConverter {

	/**
	 * Given an Object returned by a tool, convert it to a String compatible with the
	 * given class type.
	 */
	String convert(@Nullable Object result, @Nullable Type returnType);

}

class CustomerTools {

    @Tool(description = "Retrieve customer information")
    Customer getCustomerInfo(Long id, ToolContext toolContext) {
        return customerRepository.findById(id, toolContext.get("tenantId"));
    }

}

ChatModel chatModel = ...

String response = ChatClient.create(chatModel)
        .prompt("Tell me more about the customer with ID 42")
        .tools(new CustomerTools())
        .toolContext(Map.of("tenantId", "acme"))
        .call()
        .content();

System.out.println(response);

ChatModel chatModel = ...
ToolCallback[] customerTools = ToolCallbacks.from(new CustomerTools());
ChatOptions chatOptions = ToolCallingChatOptions.builder()
    .toolCallbacks(customerTools)
    .toolContext(Map.of("tenantId", "acme"))
    .build();
Prompt prompt = new Prompt("Tell me more about the customer with ID 42", chatOptions);
chatModel.call(prompt);

public class DefaultToolExecutionEligibilityPredicate implements ToolExecutionEligibilityPredicate {

	@Override
	public boolean test(ChatOptions promptOptions, ChatResponse chatResponse) {
		return ToolCallingChatOptions.isInternalToolExecutionEnabled(promptOptions) && chatResponse != null
				&& chatResponse.hasToolCalls();
	}

}

ChatModel chatModel = ...
ToolCallingManager toolCallingManager = ToolCallingManager.builder().build();

ChatOptions chatOptions = ToolCallingChatOptions.builder()
    .toolCallbacks(new CustomerTools())
    .internalToolExecutionEnabled(false)
    .build();
Prompt prompt = new Prompt("Tell me more about the customer with ID 42", chatOptions);

ChatResponse chatResponse = chatModel.call(prompt);

while (chatResponse.hasToolCalls()) {
    ToolExecutionResult toolExecutionResult = toolCallingManager.executeToolCalls(prompt, chatResponse);

    prompt = new Prompt(toolExecutionResult.conversationHistory(), chatOptions);

    chatResponse = chatModel.call(prompt);
}

System.out.println(chatResponse.getResult().getOutput().getText());

ToolCallingManager toolCallingManager = DefaultToolCallingManager.builder().build();
ChatMemory chatMemory = MessageWindowChatMemory.builder().build();
String conversationId = UUID.randomUUID().toString();

ChatOptions chatOptions = ToolCallingChatOptions.builder()
    .toolCallbacks(ToolCallbacks.from(new MathTools()))
    .internalToolExecutionEnabled(false)
    .build();
Prompt prompt = new Prompt(
        List.of(new SystemMessage("You are a helpful assistant."), new UserMessage("What is 6 * 8?")),
        chatOptions);
chatMemory.add(conversationId, prompt.getInstructions());

Prompt promptWithMemory = new Prompt(chatMemory.get(conversationId), chatOptions);
ChatResponse chatResponse = chatModel.call(promptWithMemory);
chatMemory.add(conversationId, chatResponse.getResult().getOutput());

while (chatResponse.hasToolCalls()) {
    ToolExecutionResult toolExecutionResult = toolCallingManager.executeToolCalls(promptWithMemory,
            chatResponse);
    chatMemory.add(conversationId, toolExecutionResult.conversationHistory()
        .get(toolExecutionResult.conversationHistory().size() - 1));
    promptWithMemory = new Prompt(chatMemory.get(conversationId), chatOptions);
    chatResponse = chatModel.call(promptWithMemory);
    chatMemory.add(conversationId, chatResponse.getResult().getOutput());
}

UserMessage newUserMessage = new UserMessage("What did I ask you earlier?");
chatMemory.add(conversationId, newUserMessage);

ChatResponse newResponse = chatModel.call(new Prompt(chatMemory.get(conversationId)));

@FunctionalInterface
public interface ToolExecutionExceptionProcessor {

	/**
	 * Convert an exception thrown by a tool to a String that can be sent back to the AI
	 * model or throw an exception to be handled by the caller.
	 */
	String process(ToolExecutionException exception);

}

@Bean
ToolExecutionExceptionProcessor toolExecutionExceptionProcessor() {
    return new DefaultToolExecutionExceptionProcessor(true);
}