tool/ToolExecutionErrorHandler.java

Interface for handling tool execution errors in LangChain4j, providing strategies to report to LLM or fail.

// Source: https://github.com/langchain4j/langchain4j | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
// Provided via justclaw.it.com; keep this notice with the code.
package dev.langchain4j.service.tool;

import static dev.langchain4j.internal.ValidationUtils.ensureNotBlank;

import dev.langchain4j.exception.ToolErrorVisibleToLlm;
import dev.langchain4j.exception.ToolExecutionException;
import dev.langchain4j.service.AiServices;
import java.util.function.Function;

/**
 * Handler for {@link ToolExecutionException}s thrown by a {@link ToolExecutor}.
 * <p>
 * There are two ways to handle errors:
 * <p>
 * 1. Return a {@link ToolErrorHandlerResult#text(String) text message} that will be sent back
 * to the LLM, allowing it to respond appropriate

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