Cargando…
Learning concurrency in Kotlin : build highly efficient and robust applications /
The requirements of modern day applications are scalability, speed and making the most use of hardware. Kotlin provides immense support for concurrency. This book addresses the challenges for the design and implementation of concurrent code and shows you how to write lock-free concurrent code taking...
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Birmingham, UK :
Packt Publishing,
2018.
|
| Temas: | |
| Acceso en línea: | Texto completo (Requiere registro previo con correo institucional) |
Tabla de Contenidos:
- Cover; Title Page; Copyright and Credits; Packt Upsell; Contributors; Table of Contents; Preface; Chapter 1: Hello, Concurrent World!; Processes, threads, and coroutines; Processes; Threads; Coroutines; Putting things together; Introduction to concurrency; Concurrency is not parallelism; CPU-bound and I/O-bound; CPU-bound; I/O-bound; Concurrency versus parallelism in CPU-bound algorithms; Single-core execution; Parallel execution; Concurrency versus parallelism in I/O-bound algorithms; Why concurrency is often feared; Race conditions; Atomicity violation; Deadlocks; Livelocks
- Concurrency in KotlinNon-blocking; Being explicit; Readable; Leveraged; Flexible; Concepts and terminology; Suspending computations; Suspending functions; Suspending lambdas; Coroutine dispatcher; Coroutine builders; Summary; Chapter 2: Coroutines in Action; Downloading and installing Android Studio; Creating a Kotlin project; Adding support for coroutines; Android's UI thread; CalledFromWrongThreadException; NetworkOnMainThreadException; Requesting in the background, updating in the UI thread; Creating a thread; CoroutineDispatcher; Attaching a coroutine to a dispatcher
- Starting a coroutine with asyncStarting a coroutine with launch; Using a specific dispatcher when starting the coroutine; Adding networking permissions; Creating a coroutine to call a service; Adding UI elements; What happens when the UI is blocked; Displaying the amount of news that were processed; Using a UI dispatcher; Platform-specific UI libraries; Adding the dependency; Using Android's UI coroutine dispatcher; Creating an asynchronous function to hold the request ... or not; A synchronous function wrapped in an asynchronous caller; An asynchronous function with a predefined dispatcher
- An asynchronous function with a flexible dispatcherHow to decide which option is better; Summary; Chapter 3: Life Cycle and Error Handling; Job and Deferred; Job; Exception handling; Life cycle; New; Active; Canceling; Cancelled; Completed; Determining the current state of a Job; Deferred; Exception handling; States move in one direction only; A note on final states; RSS- Reading from multiple feeds concurrently; Supporting a list of feeds; Creating a thread pool; Fetching the data concurrently; Merging the responses; Testing the concurrent requests; Non-happy path- Unexpected crash
- Having deferred store the exceptionDon't ignore the exception!; Summary; Chapter 4: Suspending Functions and the Coroutine Context; Improving the UI of the RSS Reader; Giving each feed a name; Fetching more information about the articles from the feed; Adding a scrollable list for the articles; Layout for the individual articles; Adapter to map the information; Adding a ViewHolder; Mapping the data; onCreateViewHolder; onBindViewHolder; getItemCount; Allowing the incremental addition of articles to the adapter; Connecting the adapter to the activity; Testing the new UI; Sanitizing the data