IO model and efficiency optimization skills in the VAVR framework

IO model and efficiency optimization skills in the VAVR framework Vavr is a Java library that builds functional programming on the Java virtual machine.It provides a set of functional programming data types and operations, and tries to provide a better Java programming experience.In the VAVR framework, the IO model is a very important part. It helps us handle the IO operation more effectively and optimize the performance of the program. 1. IO model in VAVR Vavr provides a basic IO model based on Java.nio, and combines the advantages of functional programming.It introduces two basic data types to handle IO operations: `Try` and` Future`. `Try` is an important data type used in Vavr to handle abnormal operations.It can capture the abnormalities that may be thrown in the code block, and encapsulate it as an `Failure` instance when abnormalities, and the result is encapsulated into a` Success` instance.This method can avoid using the traditional Try-Catch block in the code, making the code more concise and easy to understand. `Future` is another important data type used to process asynchronous operations in VAVR.It can perform time -consuming IO operations asynchronous to improve the performance and response of the program.We can use the `Future.ofsupplier ()` method to create a Future instance and pack the time -consuming IO operation in the supplier function.Using Future's `Get ()` method can block the current thread until IO operation is completed and returns the result. 2. Effective optimization skills in VAVR 1. Use inertial value: The collection type (such as List, SET, and MAP) in VAVR is inert vote, they will delay the calculation of the element until these elements really need to be used.This inertial value method can reduce unnecessary calculations and improve the efficiency of the program. Example code: List<Integer> numbers = List.of(1, 2, 3, 4, 5) .filter(n -> n % 2 == 0) .map(n -> n * n); System.out.println(numbers); // Output: List(4, 16) 2. Pay processing of VAVR: VAVR provides some parallel processing functions, which can perform time -consuming operation parallel to improve the efficiency of the program.By using VAVR's `Parallstream () method, we can convert the collection type into parallel flow and use parallel processing to process data. Example code: List<Integer> numbers = List.of(1, 2, 3, 4, 5) .parallStream() .filter(n -> n % 2 == 0) .map(n -> n * n) .toList(); System.out.println(numbers); // Output: List(4, 16) 3. Use the cache mechanism of VAVR: Vavr provides a type of `lazy` for cache results.We can use the `Lazy.of ()" method to create a lazy instance and pack the time -consuming computing logic in the supplier function.When the `Get ()" method of the lazy instance is first called, the calculation logic will be executed and returned to the result, and the subsequent call will return the result of the previous calculation. Example code: Lazy<List<Integer>> lazyNumbers = Lazy.of(() -> { System.out.println("Calculating numbers"); return List.of(1, 2, 3, 4, 5); }); System.out.println(lazyNumbers.get()); // Output: Calculating numbers System.out.println(lazyNumbers.get()); // Output: List(1, 2, 3, 4, 5) In summary, the IO model in the VAVR framework can help us handle the IO operation more effectively and optimize the performance of the program.By using the IO model and efficiency optimization technique provided by Vavr reasonably, we can write more efficient and easy -to -maintain Java code.