Spring cloud advanced: message driven Spring Cloud Stream message partition

  my blog: Programmer Xiaoxiaosheng Welcome to blog! Last chapter Spring cloud advanced: Spring Cloud Stream consumer group Among them, we realize the function that messages are only received by one consumer in the same group by configuring consumer groups. This chapter describes the functions of message partitioning. Preface   in Spr ...

Posted on Sat, 15 Feb 2020 06:17:30 -0800 by foolguitardude

Some problems of parsing FileProvider QQUri under Android x

  1. Due to the Android version update, there is a library testing that Android X has abandoned v4, v7 and other versions Try one of the v4 packages of FileProvider that Android 7 started to use But after the Android 10 is adapted, the Android x library will be used instead androidx.core.content. ...

Posted on Sat, 15 Feb 2020 06:07:21 -0800 by matt_wood87

A brief look at the principle of ThreadPoolExecutor

The function of thread pool is not to say much, but to solve two kinds of problems: first, when a large number of asynchronous tasks are executed, thread pool can provide better performance; when not using thread pool, whenever asynchronous tasks need to be executed, a thread needs to be executed directly, and the creation and destruction of th ...

Posted on Sat, 15 Feb 2020 05:45:50 -0800 by zipp

Servlet&HTTP&Request of Java learning notes

1, The architecture of Servlet 1.Servlet: Interface 2.GenericServlet: abstract class The other methods in the Servlet interface are implemented by default, and only the servlet() method is abstracted. When defining Servlet classes in the future, you can inherit GenericServlet and implement servlet() m ...

Posted on Sat, 15 Feb 2020 01:15:07 -0800 by lawnninja

[Enjoy Feign]10. Enable Feign to naturally support POJO encoding and decoding using feign-jackson module

"Flexibility is overestimated - constraints are liberation," says the Redis author. ->Return to Column Directory <- Code download address: https://github.com/f641385712/feign-learning Catalog Preface text feign-jackson Solution Option 1: Manual encoding (serialization) Scenario 2: ...

Posted on Fri, 14 Feb 2020 20:47:50 -0800 by KaFF

JDBC operation database 06

There is a problem in synthesizing the jdbc operations in the previous several articles, that is, too many repetitive steps need to be written, which wastes time, so you can write a jdbc tool class, encapsulate some repetitive code, and call directly when necessary Steps: 1. Write the JdbcUtil class as ...

Posted on Fri, 14 Feb 2020 07:11:48 -0800 by p2003morris

Fingerprint identification process of Biometric biometric on Android Q

Part I: Fingerprint HIDL On devices with fingerprint sensors, users can register one or more fingerprints and use them to unlock devices and perform other tasks. Android uses Fingerprint HIDL (hardware interface definition language) to connect to vendor specific libraries and fingerprint hardware (s ...

Posted on Fri, 14 Feb 2020 03:29:22 -0800 by DaiLaughing

Activity managerservice the second lecture: Service startup process

1, Service startup process When we start a Service, we usually call the startService() method or bindService() method. Let's take a look at the flow of these two methods. 1.startService We will first call the startservice () method in Activity. You can see that there is no implementation of the start ...

Posted on Fri, 14 Feb 2020 01:45:24 -0800 by Spikey

[Java] 7 scenarios for multithreaded access synchronization methods

Seven scenarios for multithreaded access synchronization methods Preface 1. Synchronization method for two threads accessing an object at the same time 2. Static methods for two threads to access two objects 3. Both threads access the synchronized static method 4. Access synchronous and asynchronous ...

Posted on Thu, 13 Feb 2020 19:48:43 -0800 by jdorsch

Using Java implementation to find perimeters of different graphics

Exercise 2: Finding Perimeters of Different Graphics A project description Training purposes: Use interfaces to achieve polymorphism. Training requirements: Design a graphical interface, which contains an abstract method for calculating the perimeter, and implement the methods in the interface by de ...

Posted on Thu, 13 Feb 2020 18:37:30 -0800 by kkessler