Interface ToolHandler

Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface ToolHandler
Functional interface for handling tool invocations from the AI assistant.

When the assistant decides to use a tool, it invokes this handler with the tool's arguments. The handler should perform the requested action and return the result.

Example Implementation

// Option 1: Type-safe access with records (recommended)
record SearchArgs(String query) {
}

ToolHandler handler = invocation -> {
	SearchArgs args = invocation.getArgumentsAs(SearchArgs.class);
	String result = performSearch(args.query());
	return CompletableFuture.completedFuture(result);
};

// Option 2: Map-based access
ToolHandler handler = invocation -> {
	Map<String, Object> args = invocation.getArguments();
	String query = (String) args.get("query");
	String result = performSearch(query);
	return CompletableFuture.completedFuture(result);
};
Since:
1.0.0
See Also:

  • Method Details

    • invoke

      CompletableFuture<Object> invoke(ToolInvocation invocation)
      Invokes the tool with the given invocation context.

      The returned object will be serialized to JSON and sent back to the assistant as the tool's result. This can be a String, Map, or any JSON-serializable object.

      Parameters:
      invocation - the invocation context containing arguments
      Returns:
      a future that completes with the tool's result