Spring

字节跳动年底再招10000人，Java工程师非常紧缺！

由 一曲冷凌霜 提交于 2021-02-11 08:30:59
现阶段很多人被表象迷惑，感觉Java的开发人员并不好找工作。一部分人就误以为市场饱和了，却没考虑到是自身能力不足，而且他们在学习的过程中往往是这样的： 对知识点不会筛选，盲目买书看视频，资料堆积如山,什么都不管先学了再说; 指望把一本书啃透、一套视频看完,多敲敲写一些就能搞定; 什么都学,感觉什么都会,但是在做项目的时候一头雾水; 听别人说哪个好就学哪个,盲目跟风; 各种乱七八糟的东西都用,只要实现效果其他的都可以忽略,停留在"搬运"阶段; 从来没有意识到做项目的规范和标准以及注意事项; 可想而知，这样学习下来的技能达不到企业要求水平，自然而然找不到工作。 而最近，字节跳动宣布花50亿买的办公楼已经入驻千人，并且要在年底再快速扩招1万人，而最紧缺的却是Java工程师。 因此，给大家推荐一个「咕泡学院」的Java架构师课程，我相信有一部分程序员是了解过这个课程的。 Java架构班 重磅招生 全新改版，课程对标阿里P6+ 多名一线架构师倾力打造（前惠普、陆金所、阿里） 一 、课程简介 本课程主要针对具有 1-5年及以上Java开发经验 的在职人群，精准定制学习计划;帮助系统化梳理碎片化知识;形成独特的自我认知。以培养学习方法、思维方式、项目实战、源码分析能力、架构设计能力、预测判断能力为目的，真正让每一位学员次投资，终身受益。由10年以上从业经验的一线互联网公司架构师、技术总监授课

Writing a JUnit test for a “Step” scoped bean - No scope registered for scope name “step” (Spring Batch 3.0.10)

由 蹲街弑〆低调 提交于 2021-02-11 08:09:09
问题 I want to write a JUnit test case for a Spring managed bean which has the scope as "step". This bean is refereed by a Spring Batch Tasklet. Bean defintion for configDAO ConfigDAOImpl class <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:batch="http://www.springframework.org/schema

Writing a JUnit test for a “Step” scoped bean - No scope registered for scope name “step” (Spring Batch 3.0.10)

由 走远了吗. 提交于 2021-02-11 08:06:03
问题 I want to write a JUnit test case for a Spring managed bean which has the scope as "step". This bean is refereed by a Spring Batch Tasklet. Bean defintion for configDAO ConfigDAOImpl class <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:batch="http://www.springframework.org/schema

Writing a JUnit test for a “Step” scoped bean - No scope registered for scope name “step” (Spring Batch 3.0.10)

由 一曲冷凌霜 提交于 2021-02-11 08:05:50
问题 I want to write a JUnit test case for a Spring managed bean which has the scope as "step". This bean is refereed by a Spring Batch Tasklet. Bean defintion for configDAO ConfigDAOImpl class <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:batch="http://www.springframework.org/schema

Spring batch multithreading: throttle-limit impact

由 余生长醉 提交于 2021-02-11 08:00:51
问题 I have a multi-threaded Step configured with a threadpool with a corePoolSize of 48 threads (it's a big machine) but I did not configure the throttle-limit . I am wondering if I have been under utilizaing the machine because of this. The Spring Batch documentation says that throttle-limit is the max amount of concurrent tasks that can run at one time and the default is 4 . I can see in jconsole that in fact there are 48 threads created and they seem to be executing (I can also see that in my

how to access custom annotation values in spring aspect

由 一曲冷凌霜 提交于 2021-02-11 07:35:41
问题 I am trying to access the custom annotation values from jointCut. But I couldn't find a way. My sample code : @ComponentValidation(input1="input1", typeOfRule="validation", logger=Log.EXCEPTION) public boolean validator(Map<String,String> mapStr) { //blah blah } Trying to access @Aspect class. But, i didnt see any scope to access values. Way i am trying to access is below code CodeSignature codeSignature = (CodeSignature) joinPoint.getSignature(); String[] names = codeSignature

Liquibase in Spring boot application keeps 10 connections open

由 北城余情 提交于 2021-02-11 07:21:05
问题 I'm working on a Spring Boot application with Liquibase integration to setup the database. We use a different user for the database changes which we configured using the application.properties file liquibase.user=abc liquibase.password=xyz liquibase.url=jdbc:postgresql://something.eu-west-1.rds.amazonaws.com:5432/app?ApplicationName=${appName}-liquibase liquibase.enabled=true liquibase.contexts=dev,postgres We have at this moment 3 different microservices in deployment and we noticed that for

Manually call Spring Annotation Validation Outside of Spring MVC

由 霸气de小男生 提交于 2021-02-11 06:58:31
问题 I have the following test that fails: @Test public void testValidation() { Validator validator = new LocalValidatorFactoryBean(); Map<String, String> map = new HashMap<String, String>(); MapBindingResult errors = new MapBindingResult(map, Foo.class.getName()); Foo foo = new Foo(); foo.setBar("ba"); validator.validate(foo, errors); assertTrue(errors.hasFieldErrors()); } Foo is as follows: import javax.validation.constraints.Size; public class Foo { @Size(min=9, max=9) private String bar; // ..

Cannot catch DataIntegrityViolationException

由 青春壹個敷衍的年華 提交于 2021-02-11 06:49:28
问题 I am using Spring Boot 2 with spring-boot-starter-data-jpa with an underlying MariaDB. I have table with a unique key "username". I want to catch DataIntegrityViolationException if this constraint is violated, but it seems like Spring is logging DataIntegrityViolationException and does not rethrow the after logging(my best guess). MySQLIntegrityConstraintViolationException is thrown instead. I would like to catch DataIntegrityViolationException in UserService.createUser(..) . Here are a

Cannot catch DataIntegrityViolationException

由 邮差的信 提交于 2021-02-11 06:48:12
问题 I am using Spring Boot 2 with spring-boot-starter-data-jpa with an underlying MariaDB. I have table with a unique key "username". I want to catch DataIntegrityViolationException if this constraint is violated, but it seems like Spring is logging DataIntegrityViolationException and does not rethrow the after logging(my best guess). MySQLIntegrityConstraintViolationException is thrown instead. I would like to catch DataIntegrityViolationException in UserService.createUser(..) . Here are a
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