![]() This repo contains a large number of modules. To run a Spring Boot module, run the command: mvn spring-boot:run in the module directory. To build a specific module, run the command: mvn clean install in the module directory. Mvn clean install -Pintegration-jdk9-and-above Building a single module Mvn clean install -Pdefault-jdk9-and-above Mvn clean install -Pintegration-lite-first,integration-lite-second,integration-heavyĪnalogously, for the JDK9 and above projects the commands are: Or if we want to build the entire repository with Integration Tests enabled, we can do: Mvn clean install -Pdefault-first,default-second,default-heavy Though it should not be needed often to build the entire repository at once because we are usually concerned with a specific module.īut if we want to, we can invoke the below command from the root of the repository if we want to build the entire repository with only Unit Tests enabled: Therefore, we have a total of 8 profiles: Profile Next, they are segregated further on the basis of the tests that we want to execute.Īdditionally, there are 2 profiles dedicated for JDK9 and above builds. The projects are broadly divided into 3 lists: first, second and heavy. We are using maven build profiles to segregate the huge list of individual projects we have in our repository.Īs for now, vast majority of the modules require JDK8 to build and run correctly. In addition to Spring, the modules here cover a number of aspects of Java. This project is a collection of small and focused tutorials - each covering a single and well defined area of development in the Java ecosystem.Ī strong focus of these is, of course, the Spring Framework - Spring, Spring Boot and Spring Security. > LEARN SPRING SECURITY - MASTER CLASS Java and Spring Tutorials 18:18:30.Here's the Master Class of "REST With Spring" (along with the new announced Boot 2 material):Īnd here's the Master Class of "Learn Spring Security": ![]() 18:18:30.500 INFO 15596 - c.j.e. : Starting: getStockPrice for company company1 with thread threadNum-1 18:18:30.493 INFO 15596 - c.j.e.a.controller.StockPriceController : After three calls to async getStockPrice, active count: 2, Pool size: 2, Queue Size: 1 18:18:30.493 INFO 15596 - c.j.e.a.controller.StockPriceController : Calling async getStockPrice for compan圓, active count: 2, Pool size: 2, Queue Size: 0 18:18:30.493 INFO 15596 - c.j.e.a.controller.StockPriceController : Calling async getStockPrice for company2, active count: 1, Pool size: 1, Queue Size: 0 18:18:30.486 INFO 15596 - c.j.e.a.controller.StockPriceController : Calling async getStockPrice for company1, active count: 0, Pool size: 0, Queue Size: 0 Go ahead and make your GET call to from Postman. If you don't have a port defined in application properties, go ahead and make an application properties file with a port number. Go ahead and do this and start up your class MultiThreadedApplication ", sleeptime, taskExecutor.getActiveCount(), taskExecutor.getPoolSize(), taskExecutor.getThreadPoolExecutor().getQueue().size()) If you place the code as shown below in the main method of your Spring Boot application, prior to n, you can run some code in a separate thread while Spring Boot starts up! Then, as shown below, we call the execute method which takes as inputĪny class that implements the runnable interface, or a lambda expression, which is what we use here. We can generate a single thread by creating a Single Thread Executor. Vanilla Java: Using Executors to Create Single ThreadsĪs explained in my previous tutorial, let's create a SpringBoot application named MultiThreadedApplication. ![]() ![]() Or waiting for slow reads or writes to a disk, we may opt to have more threads than number of cores because Network or I/O intensive tasks - If our threads are making HTTP calls and waiting on a response, Need threads too, we may need to reduce number of threads to less than the number of cores. We should limit the number of threads to at most the number of cores on our system. How to Choose the Right Number of Threads CPU intensive tasks - Since we can only have as many threads actually running as we have cores, if our task is CPU intensive, More threads than we have cores, the OS will schedule these threads accordingly. You can have as many threads running as you have cores in your CPU(s). The background can help build your foundation.Ī thread is a sequence of programmed instructions that can be managed by the Operating System's scheduler.Ī program can spawn multiple threads, which are then managed by the operating system. Vanilla Java: Using Executors to Create Single Threadsįeel free to skip the background sections on multithreading outside of SpringBoot. ![]() How to Choose the Right Number of Threads.Intro to MultiThreading and Thread Pools. ![]()
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