### Implementing Rate Limiting with Dart Queue Source: https://github.com/rknell/dart_queue/blob/master/README.md Illustrates how to apply rate limiting to a `Queue` by setting a `delay` between the execution of consecutive items. This ensures that the next task only starts after a specified duration has passed since the previous one began, useful for API call limits. ```Dart import 'package:queue/queue.dart'; main() async { final queue = Queue(delay: Duration(milliseconds: 500)); // Set the delay here //Queue up a future and await its result final result1 = await queue.add(()=>Future.delayed(Duration(milliseconds: 10))); final result2 = await queue.add(()=>Future.delayed(Duration(milliseconds: 10))); //Thats it! } ``` -------------------------------- ### Basic Future Queueing in Dart Source: https://github.com/rknell/dart_queue/blob/master/README.md Demonstrates the simplest way to use the `Queue` library. It initializes a new queue, adds a Future to it, and awaits its result, showcasing fundamental asynchronous task management. ```Dart import 'package:queue/queue.dart'; main() async { final queue = Queue(); //Queue up a future and await its result final result = await queue.add(()=>Future.delayed(Duration(milliseconds: 10))); //Thats it! } ``` -------------------------------- ### Advanced Queueing with Delay and Result Retrieval in Dart Source: https://github.com/rknell/dart_queue/blob/master/README.md Illustrates creating a `Queue` with an initial delay, adding multiple asynchronous tasks, and awaiting the result of a specific Future. It highlights how tasks resolve in the order they are added, even with varying internal delays. ```Dart import 'package:queue/queue.dart'; main() async { //Create the queue container final Queue queue = Queue(delay: Duration(milliseconds: 10)); //Add items to the queue asyncroniously queue.add(()=>Future.delayed(Duration(milliseconds: 100))); queue.add(()=>Future.delayed(Duration(milliseconds: 10))); //Get a result from the future in line with await final result = await queue.add(() async { await Future.delayed(Duration(milliseconds: 1)); return "Future Complete"; }); //100, 10, 1 will reslove in that order. result == "Future Complete"; //true } ``` -------------------------------- ### Configuring LIFO (Last In First Out) Order in Dart Queue Source: https://github.com/rknell/dart_queue/blob/master/README.md Shows how to create a `Queue` that processes tasks in a Last In, First Out (LIFO) order by setting the `lifo` parameter to `true`. This means the most recently added item will be processed before older items. ```Dart import 'package:queue/queue.dart'; main() async { // Create a LIFO queue final queue = Queue(lifo: true); // Add items to the queue queue.add(() => Future.delayed(Duration(milliseconds: 100))); // Will be processed last queue.add(() => Future.delayed(Duration(milliseconds: 50))); // Will be processed second queue.add(() => Future.delayed(Duration(milliseconds: 10))); // Will be processed first } ``` -------------------------------- ### Listening to Remaining Item Count Changes in Dart Queue Source: https://github.com/rknell/dart_queue/blob/master/README.md This code illustrates how to subscribe to a stream that notifies about changes in the `Queue`'s remaining item count, demonstrating how to add items, wait for queue completion, and properly dispose of stream and queue resources. It depends on `package:queue/queue.dart` for queue management. ```Dart import 'package:queue/queue.dart'; final queue = Queue(); final remainingItemsStream = queue.remainingItems.listen((numberOfItems)=>print(numberOfItems)); //Queue up a couple of futures queue.add(()=>Future.delayed(Duration(milliseconds: 10))); queue.add(()=>Future.delayed(Duration(milliseconds: 10))); // Will only resolve when all the queue items have resolved. await queue.onComplete; remainingItemsStream.close(); queue.dispose(); // Will clean up any resources in the queue if you are done with it. ``` -------------------------------- ### Configuring Parallel Task Execution in Dart Queue Source: https://github.com/rknell/dart_queue/blob/master/README.md Shows how to configure the `Queue` to process multiple items concurrently using the `parallel` parameter. This allows the queue to execute the next available task as soon as a slot opens, rather than waiting for all previous tasks to complete. ```Dart import 'package:queue/queue.dart'; main() async { final queue = Queue(parallel: 2); //Queue up a future and await its result final result1 = await queue.add(()=>Future.delayed(Duration(milliseconds: 10))); final result2 = await queue.add(()=>Future.delayed(Duration(milliseconds: 10))); //Thats it! } ``` -------------------------------- ### Adding Urgent Items to the Front of a Dart Queue Source: https://github.com/rknell/dart_queue/blob/master/README.md Demonstrates how to prioritize tasks by adding them to the front of the queue using the `addToFront` parameter. This ensures that an urgent item is processed immediately after the currently executing task, bypassing its position in the regular queue order. ```Dart import 'package:queue/queue.dart'; main() async { final queue = Queue(); // Add a regular item to the queue queue.add(() => Future.delayed(Duration(milliseconds: 100))); // Add an urgent item that should be processed next queue.add( () => Future.delayed(Duration(milliseconds: 50)), addToFront: true ); } ``` -------------------------------- ### Awaiting All Queue Items Completion in Dart Source: https://github.com/rknell/dart_queue/blob/master/README.md Demonstrates how to use `queue.onComplete` to wait until all items currently in the queue, including those in progress and those pending, have finished processing. This is useful for ensuring all tasks are done before proceeding. ```Dart import 'package:queue/queue.dart'; main() async { final queue = Queue(parallel: 2); //Queue up a couple of futures queue.add(()=>Future.delayed(Duration(milliseconds: 10))); queue.add(()=>Future.delayed(Duration(milliseconds: 10))); // Will only resolve when all the queue items have resolved. await queue.onComplete; } ``` -------------------------------- ### Querying Remaining Item Count in Dart Queue Source: https://github.com/rknell/dart_queue/blob/master/README.md This snippet demonstrates how to synchronously retrieve the current number of outstanding items in a `Queue` instance using the `remainingItemCount` getter. It requires the `package:queue/queue.dart` dependency for queue functionality. ```Dart import 'package:queue/queue.dart'; final queue = Queue(); final count = queue.remainingItemCount; ``` === COMPLETE CONTENT === This response contains all available snippets from this library. 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