propagation

How to use spring transaction in multithread

由 拜拜、爱过 提交于 2019-12-17 07:20:19
问题 I have a method as below: ClassA.java @Transactional public void methodA(){ ExecutorService executorService = Executors.newFixedThreadPool(4); executorService.execute(new Runnable() { public void run() { classB.methodB(); } }); } ClassB.java @Transactional public void methodB(){ updateDB(); } Can the methodB work well? Per my understanding, methodB will attach the transaction of methodA, what if methodA exits before methodB? I guess only methodA can be commited by the transaction. But methodB

Spring @Transactional - isolation, propagation

由 落花浮王杯 提交于 2019-12-17 01:20:27
问题 Can someone explain what isolation & propagation parameters are for in the @Transactional annotation via real-world example? Basically when and why I should choose to change their default values. 回答1: Good question, although not a trivial one to answer. Propagation Defines how transactions relate to each other. Common options: Required : Code will always run in a transaction. Creates a new transaction or reuses one if available. Requires_new : Code will always run in a new transaction.

Time it takes for data in HTML LocalStorage to be available in other windows/tabs

由 自闭症网瘾萝莉.ら 提交于 2019-12-12 02:47:27
问题 I have a webpage that uses HTML LocalStorage. It is common to have multiple tabs/windows of this page open at the same time. Since these all use the same LocalStorage and LocalStorage does not provide transactions or similar, I would like to implement some form of mutual exclusion to prevent the different tabs/windows to overwrite each other's data in an uncontrolled manner. I tried to just port my test of the Burns/Lynch mutual exclusion algorithm to the browser by simply storing the boolean

Micronaut token propagation throwing Unauthrized error

由 浪子不回头ぞ 提交于 2019-12-11 19:10:17
问题 As part of my project requirement, I am trying to call two server APIs from my parent service. All my endpoints are secured, so token has to be passed through every request. To pass token to endpoints calling from my parent controller, I have used token propagation concept of micronaut. But still I am seeing 'unauthrozed' error with child request. Note I am receiving token at parent controller method (logged and verified). Below is my code. Parent Controller - ClientUserController package io

@Transactional(propagation = Propagation.REQUIRED) in spring?

由 ∥☆過路亽．° 提交于 2019-12-11 15:24:08
问题 If I have the following code : @Component public class A{ @Transactional(propagation = Propagation.REQUIRED) public void a(){ //logic b(); //logic } @Transactional(propagation = Propagation.REQUIRED) public void b(){ //logic } } How many transactions open Spring in this code example? 回答1: It doesn't matter. When calling b() from a() it won't be going through the proxy, so any transactional attributes on b() won't be considered. The example code has 1 transaction open if a() or b() is called

stopPropagation: element.addEventListener vs onclick attribute

由 安稳与你 提交于 2019-12-10 19:35:19
问题 I'm playing with stopPropagation , adapting code from an MDC doc. Here's the question: Everything works fine if I do what they did and use element.addEVentListener("click", fname) . But, when I try to attach the function with the element's onclick attribute ( <div onclick="fname();"> ), propagation does not stop. And if I use <div onclick="function(ev) {fname();}"> , fname() isn't called at all (I also tried passing fname(ev) with the same results). Ideas anyone? Let me know if you need to

Setting InheritanceFlags vs PropagationFlags in Powershell

由 懵懂的女人 提交于 2019-12-07 15:38:00
问题 I'm trying to find the right combination of the InheritanceFlags and PropagationFlags so that my new folder will not inherit the folder's permissions before it, but will propagate the rights to the folders/files contained in the new folder... I tried swapping the two from what I have below, but that only gave the new folder the same permissions as the one above it and didn't apply my new groups... How do I set the flags correctly to only apply the permissions to all files/folders below this

jQuery - how to use stopPropagation()

由 浪尽此生 提交于 2019-12-06 16:57:16
问题 I've done this before, but I'm having trouble getting this to work... I need the following jquery to have a .stopPropagation function, so the animation won't go crazy if the user hovers over three elements too quickly! $(function () { var tabContainers = $('div.subMenu > div'); tabContainers.hide(); $('.mainMenuDiv a').hover( function (e) { tabContainers.filter(this.hash).slideDown(); e.stop(); }, function(e){ tabContainers.filter(this.hash).slideUp(); e.stopPropagation(); }); }); 回答1: Sounds

Setting InheritanceFlags vs PropagationFlags in Powershell

由 烈酒焚心 提交于 2019-12-06 01:16:43
I'm trying to find the right combination of the InheritanceFlags and PropagationFlags so that my new folder will not inherit the folder's permissions before it, but will propagate the rights to the folders/files contained in the new folder... I tried swapping the two from what I have below, but that only gave the new folder the same permissions as the one above it and didn't apply my new groups... How do I set the flags correctly to only apply the permissions to all files/folders below this folder and not pull from the parent folder? I found this table , but it doesn't seem to do what I'm

What is the reason of implicit virtual-ness propagation?

由 情到浓时终转凉″ 提交于 2019-12-05 05:56:20
I've only been working with C++ for 2~3 months and recently I found out about the identifier, final , that comes after a virtual function. To this day, I believed that omission of virtual will stop the propagation of virtualness but I was wrong. It implicitly propagates. My question is this. Why allow implicit propagation? Why can't an existence of virtual make a function virtual and absense of virtual make a function not virtual? Is is better in some circumstance? or Was it, back in the day when virtual was first introduced? According to Clifford's answer , there even is a compiler that
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