Java crawler server is blocked, don't panic, let's change a server

This is the fourth in a series of Java crawler blogs, in the last one Java crawler encounters data asynchronous loading, try these two methods! ) In this article, we have a brief talk about how to deal with the problem of asynchronous loading of data from the perspective of built-in browser kernel and reverse parsing. In this article, we will b ...

Posted by poknam on Mon, 14 Oct 2019 22:05:25 -0700

Heterogeneous Actual Warfare of Data Subscribe and Convert Logs Based on canal

What is heterogeneous data processing? Simply put, in order to satisfy the expansion of our business, data is transformed from a specific format to a new data format. Why does this need arise? In traditional enterprises, data are mainly stored in relational databases, such as MySQL, but in order to meet the expansion of demand, the dimension ...

Posted by matthewhaworth on Mon, 14 Oct 2019 20:01:35 -0700

Spring Boot 2.X: Spring Cache

Introduction to Spring Cache Multi-Cache support is introduced in Spring 3.1. In the spring-context package, two interfaces, org.spring framework.cache.Cache and org.spring framework.cache.CacheManager, are defined to unify different caching technologies. Cache interfaces include common operations of caching: add, delete, read, and so on. Cache ...

Posted by copernic67 on Mon, 14 Oct 2019 20:00:28 -0700

Java daemon threads from a JVM Perspective

Java Multithreading Series 7. Let's talk about another feature of threads: daemon threads or user threads? Let's first look at the annotations for the Thread.setDaemon() method, as shown below. Marks this thread as either a daemon thread or a user thread. The Java Virtual Machine exits when the only threads running are all daemon threads. Thi ...

Posted by SpinCode on Mon, 14 Oct 2019 18:13:31 -0700

Design Patterns-Dynamic Agent Principle and Writing a Dynamic Agent of Our Own by Imitating JDK Proxy

This article contains a lot of code, which may be a bit rough. You can read it selectively. The purpose of this article is to simply analyze the principle of dynamic agent, to imitate JDK Proxy to write a dynamic agent and to summarize several agents. For the introduction and explanation of the agency model, there are many high-quality articles ...

Posted by grga on Mon, 14 Oct 2019 18:13:34 -0700

Spring Cloud Stream for communication between services

Spring Cloud Stream The underlying implementation of Srping cloud Bus is Spring Cloud Stream, which is designed to build a message-driven (or event-driven) micro-service architecture. Spring Cloud Stream itself encapsulates (integrates) and extends modules such as Spring Messaging, Spring Integration, Spring Boot Actuator, Spring Boot Externali ...

Posted by offnordberg on Mon, 14 Oct 2019 13:21:14 -0700

Implementing the function of the landlord through the methods of Random class and Collections class

1. Functions to be achieved: Complete a licensing function (54 cards, count points, color; three players, of which the landlord has three more cards than the other players) by referring to the game rules of the landlord. Random landlord, shuffle, licensing (licensing according to the conventional w ...

Posted by jlh3590 on Mon, 14 Oct 2019 11:07:32 -0700

Current Limiting Technology for High Concurrent Solution--Counter

1. It is the simplest and easiest current limiting algorithm. The counter realizes current limiting by allowing only 10 requests per minute for the first request to enter at startTime, and only 10 requests within startTime + 60s. When there are more than ten requests in 60s, refuse, do not exceed, and reset time in 60s package com.aiyues ...

Posted by brandye71 on Mon, 14 Oct 2019 10:07:56 -0700

Java core technology Volume 1 basic knowledge learning notes -- Chapter 4 objects and classes

1. Learning LocalDate public static void main(String\u005B\u005D args) throws IOException { LocalDate date = LocalDate.now(); int month = date.getMonthValue(); int today = date.getDayOfMonth(); date = date.minusDays(today - 1); // Set to start of month, minusDays(int n) method generates the date after or bef ...

Posted by inspireddesign on Mon, 14 Oct 2019 08:42:04 -0700

Http interface call sample tutorial

Before introducing the use of HttpClient library, first introduce HttpURLConnection in jdk, because HttpClient is an open-source third-party library, which is convenient to use, but it is quite basic in jdk. Sometimes, when there is no HttpClient, HttpURLConnection in jdk can also be used. HttpURLConnection is the jdk java.net libr ...

Posted by yumico23 on Mon, 14 Oct 2019 08:23:25 -0700