Talk about the pullThresholdForQueue of rocketmq

order This paper mainly studies the pullThresholdForQueue of rocketmq pullThresholdForQueue rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/consumer/DefaultMQPushConsumer.java public class DefaultMQPushConsumer extends ClientConfig implements MQPushConsumer { //...... /** * Flow control threshold on queue level, each m ...

Posted on Thu, 21 Nov 2019 10:35:57 -0800 by sdi126

How applets encapsulate custom components (Toast)

1. Create a new myToast directory in the component directory of the same level as pages, for example: 2. Contents of myToast.wxml file: <!-- custom toast assembly --> <!-- name Module name --> <template name="toast" > <!-- catchtouchmove='xxx' Rolling penetration of mask layer --> <!-- isHide Disappearance of d ...

Posted on Thu, 21 Nov 2019 10:32:14 -0800 by gszauer

PMS power management

http://blog.csdn.net/gaugamela/article/details/52838654   Binderservice : IPowerManager.stub Localservice : PowerManagerInternal 1. Initialization PMS is created in startbootstrap services of system server  public static void main(String[] args) {         new SystemServer().run();     } private void run() { // Start ser ...

Posted on Thu, 21 Nov 2019 10:32:30 -0800 by maseeha

vue infinite scrolling component based on elementui

The component code is as follows <template> <div :class="wrapClasses" style="touch-action: none;"> <div :class="scrollContainerClasses" :style="{height: height + 'px'}" @scroll="handleScroll" @wheel="onWheel" @touchstart="onPointerDown" ref="scrollContainer" > ...

Posted on Thu, 21 Nov 2019 10:15:31 -0800 by jowatkins

Using JS to achieve mosaic effect.

Using JS to achieve mosaic effect. Use js to mosaic the picture. The effect is as follows: On the left is the picture before mosaic, on the right is the effect after mosaic. Operation method: Create a new html file, and write the following contents in the html area: <canvas id="canvas" data-src="test.jpg" width="800" height="600"></c ...

Posted on Thu, 21 Nov 2019 09:30:22 -0800 by versatilewt

Crawler framework: the operation principle of scrape (pipeline)

Return iteratable object after parsing When this object returns, it will be received again by the crawler and then iterated Output the iterative data to an external file in json, XML or CSV format through the scrape crawl budejie - O xx.josn/xx.xml/xx.csv If the pipeline is turned on, the data will be input into the pipeline every iteration ...

Posted on Thu, 21 Nov 2019 09:14:23 -0800 by Scottiebabes

PostgreSQL denial of service DDOS attack and Prevention

Label PostgreSQL, DDoS, denial of service, lock, SLOT background In the process of connecting to the database, the database needs to have enough slots (connection slots, configured through max_connections) for authentication. If the connection SLOT is occupied, or the authentication process is locked (making the authentication process locked ...

Posted on Thu, 21 Nov 2019 09:13:44 -0800 by hostfreak

Sword finger offer -- Reconstruction of binary tree and three traversal methods (c + +)

Reconstruction of binary tree   Title Description Enter the results of the preorder traversal and inorder traversal of a binary tree, and rebuild the binary tree. It is assumed that the results of the input preorder traversal and preorder traversal do not contain duplicate numbers. For example, if the sequence {1,2,4,7,3,5,6 ...

Posted on Thu, 21 Nov 2019 08:59:47 -0800 by D1proball

JS-20-element / attribute addition, deletion, modification and query

I. JavaScript element addition, deletion, modification and query 1. Create nodelet oSpan = document.createElement("span"); 2. Add node Note: the appendChild method adds the specified element to the end; // let oDiv = document.querySelector("div"); // oDiv.appendChild(oSpan) / / add the elements in the oSpan to the end of the o ...

Posted on Thu, 21 Nov 2019 08:59:09 -0800 by sonicfusion

Java encrypts string and returns asterisk ※

 If you don't look back, you'll never know I waiting for you behind you.   Java encrypts string and returns asterisk ※ PasswordUtils, the encryption tool class, was found in the source code of Ranger project. It is a security management framework, and its encryption tool class should be used for ordinary encryption requirements; First of al ...

Posted on Thu, 21 Nov 2019 08:54:38 -0800 by davo666