RunnableMap<RunInput extends Object> class

A RunnableMap allows you to run multiple Runnable objects in parallel on the same input returning a map of the results.

You can create a RunnableMap using the Runnable.fromMap static method.

When you call invoke on a RunnableMap, it will invoke each Runnable in the map in parallel, passing the same input to each one. The output of each Runnable is returned in a map, where the keys are the names of the outputs.

Example:

final openaiApiKey = Platform.environment['OPENAI_API_KEY'];
final model = ChatOpenAI(apiKey: openaiApiKey);

final promptTemplate1 = ChatPromptTemplate.fromTemplate(
  'What is the city {person} is from?',
);
final promptTemplate2 = ChatPromptTemplate.fromTemplate(
  'How old is {person}?',
);
final promptTemplate3 = ChatPromptTemplate.fromTemplate(
  'Is {city} a good city for a {age} years old person?',
);
const stringOutputParser = StringOutputParser<ChatResult>();

final chain = Runnable.fromMap({
  'city': promptTemplate1 | model | stringOutputParser,
  'age': promptTemplate2 | model | stringOutputParser,
}) | promptTemplate3 | model | stringOutputParser;

final res = await chain.invoke({'person': 'Elon Musk'});
print(res);
// It is subjective to determine whether Pretoria, South Africa, is a good
// city for a 50-year-old person as it depends on individual preferences and needs.
Inheritance

Constructors

RunnableMap(Map<String, Runnable<RunInput, RunnableOptions, Object>> steps)
A RunnableMap allows you to run multiple Runnable objects in parallel on the same input returning a map of the results.
const

Properties

defaultOptions → RunnableOptions
The default options to use when invoking the Runnable.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
steps → Map<String, Runnable<RunInput, RunnableOptions, Object>>
The map of Runnable objects to run in parallel.
final

Methods

batch(List<RunInput> inputs, {List<RunnableOptions>? options}) → Future<List<Map<String, dynamic>>>
Batches the invocation of the Runnable on the given inputs.
inherited
bind(RunnableOptions options) → RunnableBinding<RunInput, RunnableOptions, Map<String, dynamic>>
Binds the Runnable to the given options.
inherited
close() → void
Cleans up any resources associated with it the Runnable.
override
getCompatibleOptions(RunnableOptions? options) → RunnableOptions?
Returns the given options if they are compatible with the Runnable, otherwise returns null.
inherited
invoke(RunInput input, {RunnableOptions? options}) → Future<Map<String, dynamic>>
Invokes the RunnableMap on the given input.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
pipe<NewRunOutput extends Object?, NewCallOptions extends RunnableOptions>(Runnable<Map<String, dynamic>, NewCallOptions, NewRunOutput> next) → RunnableSequence<RunInput, NewRunOutput>
Pipes the output of this Runnable into another Runnable using a RunnableSequence.
inherited
stream(RunInput input, {RunnableOptions? options}) → Stream<Map<String, dynamic>>
Streams the output of invoking the Runnable on the given input.
override
streamFromInputStream(Stream<RunInput> inputStream, {RunnableOptions? options}) → Stream<Map<String, dynamic>>
Streams the output of invoking the Runnable on the given inputStream.
override
toString() → String
A string representation of this object.
inherited
withFallbacks(List<Runnable<RunInput, RunnableOptions, Map<String, dynamic>>> fallbacks) → RunnableWithFallback<RunInput, Map<String, dynamic>>
Adds fallback runnables to be invoked if the primary runnable fails.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited