异步迭代 上面讲解的使用 Async/Await 都是基于单次运行的异步函数,在 Node.js 中我们还有一类需求它来自于连续的事件触发,例如,基于流式API读取数据,常见的是注册 on('data', callback) 事件和回调函数,但是这样我们不能利用常规的 Async/Await 表达式来处理这类场景。 异步迭代器 异步迭代器与同步迭代器不同的...
//the unix timestamp in millisecondsrunCount=0;async.until(function(){//return true if 4 milliseconds have elapsed, otherwise false (and continue running the script)returnnewDate().getTime()>(startTime+5);},function(callback){runCount+=1;fs.writeFile('timed-file-'+runCount+'.txt',//t...
/* * Proceed in 3 steps: * * 1. If fewer than corePoolSize threads are running, try to * start a new thread with the given command as its first * task. The call to addWorker atomically checks runState and * workerCount, and so prevents false alarms that would add * threads when i...
System.out.println("GET返回结果:" +EntityUtils.toString(responseEntity));//回调方式调用finalCountDownLatch latch =newCountDownLatch(1);finalHttpGet get2 =newHttpGet(requestPath); httpClient.execute(get2,newFutureCallback<HttpResponse>() {publicvoidcompleted(finalHttpResponse response) { latch.countD...
=null) {5ex.printStackTrace();6return;7}8webSocket.send("a string");9webSocket.send(newbyte[10]);10webSocket.setStringCallback(newStringCallback() {11publicvoidonStringAvailable(String s) {12System.out.println("I got a string: " +s);13}14});15webSocket.setDataCallback(newDataCallback...
> returnType) { // 根据不同的返回值类型,来采用不同的方案去异步执行,但是执行器都是executor if (CompletableFuture.class.isAssignableFrom(returnType)) { return CompletableFuture.supplyAsync(() -> { try { return task.call(); } catch (Throwable ex) { throw new CompletionException(ex); } },...
Generates a download URL and returns it in the response payload. String getEndpoint() Gets the set endpoint for REST call (ex, https://www.example.com) Future<GetJavaDownloadReportResponse> getJavaDownloadReport(GetJavaDownloadReportRequest request, AsyncHandler<GetJavaDownloadReportRequest,GetJava...
In this example, JAsync rewrite the code like XXX.await() to XXX.thenVoid(v -> { ... }) to making your methods non-blocking. With JAsync, you can not only enjoy the high throughput of non-blocking programming, but also avoid callback hell and counter-intuitive chained function calls....
IfsetTimeout(long)is not called, then the container's default timeout, which is available via a call togetTimeout(), will apply. The default value is30000ms. Parameters: timeout- the timeout in milliseconds Throws: IllegalStateException- if this method is called after the container-initiate...
(WebAsyncManager.java:317) ~[spring-web-5.0.7.RELEASE.jar:5.0.7.RELEASE] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_172] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_172] at java.lang.Thread.run(Thread.java:748) [...