table of Contents
1. Common framework source code analysis
Three, concurrent programming topics
Many people will feel that they have encountered a bottleneck after doing Java development for 2, 3 years. What can be nothing but nothing, how to change the dilemma?
Many people have written codes for 7 or 8 years but are still just coders. How to break through yourself? Get a higher salary?
Many programmers will have a distress. After working for a long time, they can't get the improvement of technology by blindly adding , deleting, changing and checking in the company . In small businesses, boiling frogs in warm water has no access to the underlying code, but only uses but does not know the principle! Are you too old to be dismissed?
It's also been Java development for 3 years. Why do others get 30K, you only get 10K, why?
Some people will say: Your skills are not as high as others! Does it matter to you? People have a backstage!
In the age of the Internet, the company’s development interests are often tied to projects. Is it because of the relationship that the backstage does not use technology. How long can a company without technology stay?
In response to these situations, the editor read a lot of articles and interviews, and finally concluded that a Java developer has worked for three years and wants a monthly salary of 30K. These are the 5 core technologies that a programmer should understand at present. Then let's take a closer look.
1. Common framework source code analysis
1. Application framework Spring
2. ORM framework mybatis
3. Application framework Spring
If you want to learn the Java technology system, these three framework teachers must know Spring5, which is necessary for coding, and mybatis, which is necessary for application.
Two, distributed framework
1. Initial distribution
2. Distributed service governance middleware (zookeeper, dubbo)
3. Distributed messaging middleware (ROCKERMQ, RABBITMQ, KAFKA)
4. Distributed cache middleware (REDIS, MONGOOB, FASTDFS)
5. Distributed communication (netty)
6. Distributed search engine (elk)
7. Distributed database storage (SHARDING-SPHERE)
High concurrency, high availability, massive data, no knowledge of distributed architecture is definitely impossible to play,
Usually we think that static web pages HTML websites are the fastest, but since there are dynamic web pages, a lot of interactive data is queried from the database, and the data changes frequently. Except for some news and information websites, static HTML is used. To increase the access speed is not a realistic solution. We have to find a more suitable distributed system solution between the code and the database .
Reducing the number of database accesses, separating files and databases, big data distributed storage, server cluster load balancing, the use of page cache, nosql memory database instead of relational database, these solutions and measures are the key to improving the high concurrent performance of the system, build distribution The formula system is broken down one by one below.
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Three, concurrent programming topics
1. LOCKS lock of concurrent
package 2. TOOLS limit
of concurrent package 3. AOTMIC atom of concurrent package
4. EXECUTOR thread pool of
concurrent package 5. COLLECTIONS container of concurrent package Concurrent FORKJOIN framework
6. Memory model
7. Source code analysis, in-depth Explanation, actual project
Correct use of multi-threaded development, you can get faster processor cores, faster response time, better programming model, etc.
Fourth, performance tuning
1. JVM performance tuning
2. TOMCAT tuning
3. MySQL performance tuning
4. Nginx tuning
Performance tuning can be learned on the computer hardware, operating systems and applications want to optimize, regulate the relationship between the three, the whole system (including hardware, operating systems, applications) to maximize performance, and to continue to meet Existing business needs.
Five, microservice series
1、Spring boot
2、Spring cloud
3. Virtual container
In some micro-services giant companies are essential technology that uses micro-services to achieve effective split applications, to achieve quick to send and deployment, improve higher quality of code, improve productivity, more easily expanded.
If you can also master the five core technologies above, I believe your monthly salary is more than 30K now. Follow me and learn more about Java technology sharing. Some people will ask how to learn these five core developments systematically. Technology, is there any relevant core technical information? These core technology materials and video editors are ready for you. Click me to get the method for free . Of course, the editor here also wishes you a successful interview for Java developers!
