Java
javaTutorial
I don't configure initialize() method when configuring a custom thread pool, why does the program still run normally?
I don't configure initialize() method when configuring a custom thread pool, why does the program still run normally?
Apr 19, 2025 pm 03:48 PM
Deeply understand initialize() method of custom thread pools
When building a custom thread pool, you may notice initialize() method. Many developers can also run normally without explicitly calling this method, which raises questions: What is the function of initialize() method?
Question: I omitted initialize() method when configuring a custom thread pool, and the program is still running normally. Why is this?
Answer: The key lies in the automatic call of the Spring framework.
Let's first look at an example that does not use Spring:
public class SomeTest {
public static void main(String[] args) {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.submit(() -> System.out.println("!"));
}
}
Running this code will throw an exception: "ThreadPoolTaskExecutor not initialized". This is because ThreadPoolTaskExecutor is not initialized correctly.
Now, let's use Spring Boot to manage thread pools:
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(DemoApplication.class, args);
ThreadPoolTaskExecutor myExecutor = context.getBean("myExecutor", ThreadPoolTaskExecutor.class);
myExecutor.submit(() -> System.out.println("Hello!"));
}
@Bean
public ThreadPoolTaskExecutor myExecutor() {
return new ThreadPoolTaskExecutor();
}
}
This code works normally. This is because the Spring framework automatically calls initialize() method.
How does Spring do this? The answer lies in the ExecutorConfigurationSupport class:
@Override
public void afterPropertiesSet() {
initialize();
}
afterPropertiesSet() method is part of the InitializingBean interface. During the life cycle of Spring Bean, after the bean is initialized, Spring will automatically call afterPropertiesSet() , and this method internally calls initialize() method to complete the initialization of the thread pool.
Therefore, when you use thread pools in Spring containers, Spring will automatically complete the initialization process even if you do not explicitly call initialize() , so the program can run normally. This does not mean that initialize() method is optional. It is still responsible for the key initialization steps of the thread pool. It is just that Spring helps you complete this call.
The above is the detailed content of I don't configure initialize() method when configuring a custom thread pool, why does the program still run normally?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to avoid risks in the turmoil in the currency circle? The TOP3 stablecoin list is revealed
Jul 08, 2025 pm 07:27 PM
Against the backdrop of violent fluctuations in the cryptocurrency market, investors' demand for asset preservation is becoming increasingly prominent. This article aims to answer how to effectively hedge risks in the turbulent currency circle. It will introduce in detail the concept of stablecoin, a core hedge tool, and provide a list of TOP3 stablecoins by analyzing the current highly recognized options in the market. The article will explain how to select and use these stablecoins according to their own needs, so as to better manage risks in an uncertain market environment.
Global stablecoin market value PK! Who is the gold substitute in the bear market
Jul 08, 2025 pm 07:24 PM
This article will discuss the world's mainstream stablecoins and analyze which stablecoins have the risk aversion attribute of "gold substitute" in the market downward cycle (bear market). We will explain how to judge and choose a relatively stable value storage tool in a bear market by comparing the market value, endorsement mechanism, transparency, and comprehensively combining common views on the Internet, and explain this analysis process.
The popularity of the currency circle has returned, why do smart people have begun to quietly increase their positions? Look at the trend from the on-chain data and grasp the next round of wealth password!
Jul 09, 2025 pm 08:30 PM
As the market conditions pick up, more and more smart investors have begun to quietly increase their positions in the currency circle. Many people are wondering what makes them take decisively when most people wait and see? This article will analyze current trends through on-chain data to help readers understand the logic of smart funds, so as to better grasp the next round of potential wealth growth opportunities.
Virtual Currency Stable Coins Ranking Which is the 'safe haven' in the currency circle
Jul 08, 2025 pm 07:30 PM
This article will introduce several mainstream stablecoins and explain in depth how to evaluate the security of a stablecoin from multiple dimensions such as transparency and compliance, so as to help you understand which stablecoins are generally considered relatively reliable choices in the market, and learn how to judge their "hazard-haven" attributes on your own.
Bitcoin breaks new highs, Dogecoin rebounds strongly, will Ethereum keep up with the pace
Jul 09, 2025 pm 08:24 PM
Recently, Bitcoin hit a new high, Dogecoin ushered in a strong rebound and the market was hot. Next, we will analyze the market drivers and technical aspects to determine whether Ethereum still has opportunities to follow the rise.
What are the mainstream public chains of cryptocurrencies? The top ten rankings of cryptocurrency mainstream public chains in 2025
Jul 10, 2025 pm 08:21 PM
The pattern in the public chain field shows a trend of "one super, many strong ones, and a hundred flowers blooming". Ethereum is still leading with its ecological moat, while Solana, Avalanche and others are challenging performance. Meanwhile, Polkadot, Cosmos, which focuses on interoperability, and Chainlink, which is a critical infrastructure, form a future picture of multiple chains coexisting. For users and developers, choosing which platform is no longer a single choice, but requires a trade-off between performance, cost, security and ecological maturity based on specific needs.
What are the types of stablecoins? What are the stablecoins in digital currency?
Jul 08, 2025 pm 11:51 PM
Stable coins maintain price stability by anchoring fiat currencies such as the US dollar, which are mainly divided into three categories: 1. Fiat currency collateralization types such as USDT and USDC; 2. Cryptocurrency collateralization types such as DAI; 3. Algorithm types have higher risks. Mainstream stablecoins include USDT with the highest market value and the best liquidity. USDC is known for its compliance and transparency. DAI relies on the decentralized mechanism. TUSD adopts on-chain real-time audit. BUSD is gradually withdrawing from the market due to supervision. USDP is known for its high compliance and security. Both are widely circulated on mainstream exchanges.
A complete list of mainstream stablecoins in the currency circle. In addition to USDT, these stablecoins are more suitable for long-term holding.
Jul 08, 2025 pm 07:21 PM
In the cryptocurrency market, stablecoins are an important bridge connecting fiat currencies with digital assets. Although USDT (Tether) accounts for the largest market share, the transparency of its reserves has always attracted much attention. Therefore, it is particularly important for users seeking asset preservation and long-term holdings to understand and configure other more transparent and compliant stablecoins. This article will introduce you in detail three mainstream stablecoins besides USDT: USDC, BUSD and DAI, and analyze their respective characteristics and advantages to help you understand which one is more suitable for your long-term commitment.
