Microservices with Java, Spring Boot and Spring CloudEberhard Wolff
Spring Boot makes creating small Java application easy - and also facilitates operations and deployment. But for Microservices need more: Because Microservices are a distributed systems issues like Service Discovery or Load Balancing must be solved. Spring Cloud adds those capabilities to Spring Boot using e.g. the Netflix stack. This talks covers Spring Boot and Spring Cloud and shows how these technologies can be used to create a complete Microservices environment.
This talk introduces Spring's REST stack - Spring MVC, Spring HATEOAS, Spring Data REST, Spring Security OAuth and Spring Social - while refining an API to move higher up the Richardson maturity model
This is very basic laravel presentation. I tried to cover all the topics in this presentation. For more information, please feel free to email me - toufiqist@gmail.com
From a monolith to microservices + REST: The evolution of LinkedIn's architec...Karan Parikh
This is the story of LinkedIn's journey from a monolithic web application to a microservice based architecture, some of the challenges they faced along the way, and the tools they built to make this transition possible, including the Rest.li and Deco frameworks.
Slide quarta lezione al linguaggio Java 8 in preparazione alla certificazione OCA 1Z0-808.
Argomenti:
Design Pattern: Singleton
Classe Astratta
Interfaccia e interfaccia funzionale
Ereditarietà e costruttori
Super e this
Incapsulamento
Polimorfismo
Varargs
Overload e Override
Invocazione virtuale dei metodi
Lezione del 28-11-2017 tenuta da Valerio Radice presso Nextre Engeneering
https://www.nextre.it/corso/corso-java-oca/
An introduction to REST and RESTful web services.
You can take the course below to learn about REST & RESTful web services.
https://www.udemy.com/building-php-restful-web-services/
Microservices with Java, Spring Boot and Spring CloudEberhard Wolff
Spring Boot makes creating small Java application easy - and also facilitates operations and deployment. But for Microservices need more: Because Microservices are a distributed systems issues like Service Discovery or Load Balancing must be solved. Spring Cloud adds those capabilities to Spring Boot using e.g. the Netflix stack. This talks covers Spring Boot and Spring Cloud and shows how these technologies can be used to create a complete Microservices environment.
This talk introduces Spring's REST stack - Spring MVC, Spring HATEOAS, Spring Data REST, Spring Security OAuth and Spring Social - while refining an API to move higher up the Richardson maturity model
This is very basic laravel presentation. I tried to cover all the topics in this presentation. For more information, please feel free to email me - toufiqist@gmail.com
From a monolith to microservices + REST: The evolution of LinkedIn's architec...Karan Parikh
This is the story of LinkedIn's journey from a monolithic web application to a microservice based architecture, some of the challenges they faced along the way, and the tools they built to make this transition possible, including the Rest.li and Deco frameworks.
Slide quarta lezione al linguaggio Java 8 in preparazione alla certificazione OCA 1Z0-808.
Argomenti:
Design Pattern: Singleton
Classe Astratta
Interfaccia e interfaccia funzionale
Ereditarietà e costruttori
Super e this
Incapsulamento
Polimorfismo
Varargs
Overload e Override
Invocazione virtuale dei metodi
Lezione del 28-11-2017 tenuta da Valerio Radice presso Nextre Engeneering
https://www.nextre.it/corso/corso-java-oca/
An introduction to REST and RESTful web services.
You can take the course below to learn about REST & RESTful web services.
https://www.udemy.com/building-php-restful-web-services/
Java Spring framework, Dependency Injection, DI, IoC, Inversion of ControlArjun Thakur
Hi, I just prepared a presentation on Java Spring Framework, the topics covered include architecture of Spring framework and it's modules. Spring Core is explained in detail including but not limited to Inversion of Control (IoC), Dependency Injection (DI) etc. Thank you and happy learning. :)
Microservice With Spring Boot and Spring CloudEberhard Wolff
Spring Boot and Spring Cloud are an ideal foundation for creating Microservices based on Java. This presentation explains basic concepts of these libraries.
Building layers of defense for your applicationVMware Tanzu
SpringOne 2021
Session Title: Building Layers of Defense for Your Application Using Spring Security Framework
Speaker: Neha Sardana, Software Developer at BNY Mellon
Last updated on Dec 12, 2014
The Sightly template language, shipped with Adobe Experience Manager 6.0, simplifies a lot the component development workflow by allowing front-end developers to edit components themselves directly.
Learn about the main features of that template language, and about the tools available to make project development work more efficient.
Spring integration을 통해_살펴본_메시징_세계Wangeun Lee
[스프링캠프 2015] Spring Integration을 통해 살펴본 메시징 세계 발표자료 입니다.
예제 소스 저장소는 프리젠테이션 안에 링크 걸어놨습니다.
감사합니다.
-------------------------------------------------------------------
우리는 늘 누군가와 소통(Communication)을 합니다. 소통을 통하여 누군가에게 일을 시키기도 하고 내가 일을 받기도 합니다. 애플리케이션도 마찬가지로 이기종간의 애플리케이션끼리 데이터로 소통을 하며 할 일을 서로 분산 처리할 상황이 발생하기도 합니다.
이런 분산 처리 이전에는 소통이 전제되어야 합니다. 애플리케이션 간 소통에 대한 고민은 선구자들에 의해 Enterprise Integration Patterns로 탄생되었으며 Spring에서도 그 패턴화의 추상화 일원으로 Spring Integration을 탄생시켰습니다.
이 강연에서는 Spring Integration을 통해 애플리케이션 간에 어떻게 쉽고 편하게(?) 소통을 할 수 있게 되었는지 살펴보며 예제와 사례를 통해 Spring Integration 입문에 도움을 주고자 합니다.
Spring Interview Questions and Answers | Spring Tutorial | Spring Framework T...Edureka!
This Edureka "Spring Interview Questions and Answers" tutorial will help you to prepare yourself for Spring Framework Interviews. This tutorial is ideal for freshers as well as experienced also. Learn about the most important Spring Framework interview questions and answers and know what will set you apart in the interview process. Below are the topics covered in this tutorial:
1. General Questions
2. Dependency Injection/ IoC
3. Beans
4. Annotations
5. Data Access
6. Aspect Oriented Programming(AOP)
7. MVC
This presentation walks through essential points for developing and working with REST APIs or web services to communicate through various platforms. This also explains HTTP methods.
Sling Which is a very powerful and yet confusing feature of AEM .
This explains how the rendering script is selected from a URL.
You can subscribe to my channel to learn more about AEM-https://www.youtube.com/channel/UCaZ4m7n6kSb9xQm5tbPzE-g
Java Spring framework, Dependency Injection, DI, IoC, Inversion of ControlArjun Thakur
Hi, I just prepared a presentation on Java Spring Framework, the topics covered include architecture of Spring framework and it's modules. Spring Core is explained in detail including but not limited to Inversion of Control (IoC), Dependency Injection (DI) etc. Thank you and happy learning. :)
Microservice With Spring Boot and Spring CloudEberhard Wolff
Spring Boot and Spring Cloud are an ideal foundation for creating Microservices based on Java. This presentation explains basic concepts of these libraries.
Building layers of defense for your applicationVMware Tanzu
SpringOne 2021
Session Title: Building Layers of Defense for Your Application Using Spring Security Framework
Speaker: Neha Sardana, Software Developer at BNY Mellon
Last updated on Dec 12, 2014
The Sightly template language, shipped with Adobe Experience Manager 6.0, simplifies a lot the component development workflow by allowing front-end developers to edit components themselves directly.
Learn about the main features of that template language, and about the tools available to make project development work more efficient.
Spring integration을 통해_살펴본_메시징_세계Wangeun Lee
[스프링캠프 2015] Spring Integration을 통해 살펴본 메시징 세계 발표자료 입니다.
예제 소스 저장소는 프리젠테이션 안에 링크 걸어놨습니다.
감사합니다.
-------------------------------------------------------------------
우리는 늘 누군가와 소통(Communication)을 합니다. 소통을 통하여 누군가에게 일을 시키기도 하고 내가 일을 받기도 합니다. 애플리케이션도 마찬가지로 이기종간의 애플리케이션끼리 데이터로 소통을 하며 할 일을 서로 분산 처리할 상황이 발생하기도 합니다.
이런 분산 처리 이전에는 소통이 전제되어야 합니다. 애플리케이션 간 소통에 대한 고민은 선구자들에 의해 Enterprise Integration Patterns로 탄생되었으며 Spring에서도 그 패턴화의 추상화 일원으로 Spring Integration을 탄생시켰습니다.
이 강연에서는 Spring Integration을 통해 애플리케이션 간에 어떻게 쉽고 편하게(?) 소통을 할 수 있게 되었는지 살펴보며 예제와 사례를 통해 Spring Integration 입문에 도움을 주고자 합니다.
Spring Interview Questions and Answers | Spring Tutorial | Spring Framework T...Edureka!
This Edureka "Spring Interview Questions and Answers" tutorial will help you to prepare yourself for Spring Framework Interviews. This tutorial is ideal for freshers as well as experienced also. Learn about the most important Spring Framework interview questions and answers and know what will set you apart in the interview process. Below are the topics covered in this tutorial:
1. General Questions
2. Dependency Injection/ IoC
3. Beans
4. Annotations
5. Data Access
6. Aspect Oriented Programming(AOP)
7. MVC
This presentation walks through essential points for developing and working with REST APIs or web services to communicate through various platforms. This also explains HTTP methods.
Sling Which is a very powerful and yet confusing feature of AEM .
This explains how the rendering script is selected from a URL.
You can subscribe to my channel to learn more about AEM-https://www.youtube.com/channel/UCaZ4m7n6kSb9xQm5tbPzE-g
ASP.NET MVC'den ASP.NET Core MVC'ye Geçiş SüreciSinan Bozkuş
BilgeAdam İzmir'de "ASP.NET MVC'den ASP.NET Core MVC'ye Geçiş Süreci" ile ilgili verdiğim seminerin sunumu.
Kaynak kodları: https://github.com/sinanbozkus/BilgeAdam_Izmir_AspNetCore_Workshop
Online Dashboard, artık dashboard tasarımı, gösterimi ve yetkilendirme için ekstra araç almaya gerek kalmaksızın herhangi bir servisle entegre olarak istediğiniz zaman güncel dashboardu anlık olarak istediğiniz platformda görüntülemeye olanak sunan bir uçtan uca çözümdür.
SoBot Sistek çatısı altında bulunan tüm projelerle kolayca entegre olabilecek, müşterilerin destek elamanlarına ihtiyacından dolayı ortaya çıkmış bir ChatBot uygulamasıdır.
2. Spring kullanmak bir REST API veya
mikro service geliştirme sürecini
hızlandırır ve API geliştiricilerinin
yalnızca temel iş sürecini yazmaya
odaklanmasına ve tüm temel
yapılandırmalar ve kurulum için
endişelenmenize izin vermez.
3. Server side
SERVER SIDE
@RestController annotation ile bir class oluşturun. Annotation
nedeniyle, bu class classpath scanning ile otomatik olarak
algılanacak ve @RequestMapping annotationı ile yazılan
method HTTP bitiş noktaları olarak gösterilecektir. Gelen bir
istek @RequestMapping annotationı ile belirtilen
gereksinimlerle eşleştiğinde, method requesti sunmak için
yürütülür.
4. Bir developerın bakış açısından, bir kullanıcı
listenin veritabanından alma akışı aşağıdaki
şekilde görülür:
5. Bununla birlikte, Spring sahnelerin arkasında bizler için çok fazla iş
yaparken, her iki XML / JSON biçiminde yanıtı geri göndermek için bir
kaynağa bir HTTP request yapmak için tüm sürecin yaşam döngüsü bir
çok adım içerir.
Bir requestte bulunduğunda, örneğin:
Request : http: // localhost: 8080 / users
Accept: application/json
Bu gelen request, Spring tarafından otomatik olarak yapılandırılan
DispatcherServlet tarafından gerçekleştirilir.
6. Tüm gelen istekler tek bir servletten geçer: DispatcherServlet
Yeşilin içindeki bloklar, developer tarafından geliştirilen bloklardır.
Maviler ise Spring
7. REST Serviceler İçin Spring ile Error Handling
Spring 3.2'den önce, Spring exceptionları handle etmek için iki ana yaklaşım
şunlardı: HandlerExceptionResolver veya @ExceptionHandler annotationları.
Bunların her ikisinin de bazı olumsuz yönleri vardı.
3.2'den beri, Spring önceki iki çözümün sınırlamalarını aşmak ve tüm bir
uygulama boyunca birleşik bir excption handling önermek için
@ControllerAdvice anotasyonuna sahip.
Şimdi Spring 5, ResponseStatusException classına sahip: REST API’larımızda
temel error handling için hızlı bir yol.
8. Solution 1 – The Controller
level @ExceptionHandler
@ExceptionHandler tüm uygulama için genel olarak değil, yalnızca bu belirli
method için etkindir.
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public class FooController{
//...
@ExceptionHandler({ CustomException1.class,
CustomException2.class })
public void handleException() {
//
}
}
9. Solution 2 – The HandlerExceptionResolver
İkinci çözüm bir HandlerExceptionResolver tanımlamaktır - bu, uygulamanın
attığı herhangi bir exeptionı handle edecektir. Ayrıca, REST API’mizde tek tip
bir exception handling mekanizması uygulamamıza izin verecektir.
1. ExceptionHandlerExceptionResolver
Bu handler Spring 3.1'de tanıtıldı ve default. @ExceptionHandler annotationın
temel bileşenidir.
2. DefaultHandlerExceptionResolver
Spring 3.0'da tanıtıldı ve default olarak DispatcherServlet'te etkinleştirildi.
Standart Spring exceptionlarını ilgili HTTP Status Kodlarına Client error – 4xx
and Server error – 5xx status codes. Çözümler.
Tüm Exceptionları handle edip, HTTP kodları çözümlemesine rağmen hala bir
responsebody dönemiyordu. ModelAndView
10. Solution 2 – The HandlerExceptionResolver
3.3. ResponseStatusExceptionResolver
Bu handler Spring 3.0'da tanıtıldı ve default olarak DispatcherServlet'te etkin.
@ ResponseStatus Response statuslerine göre Custom exceptionları
implemente edebilmek için geliştirildi.
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@ResponseStatus(value = HttpStatus.NOT_FOUND)
public class ResourceNotFoundException extends RuntimeException
{
public ResourceNotFoundException() {
super();
}
public ResourceNotFoundException(String message, Throwable
cause) {
super(message, cause);
}
public ResourceNotFoundException(String message) {
super(message);
}
public ResourceNotFoundException(Throwable cause) {
super(cause);
}
}
11. Solution 2 – The HandlerExceptionResolver
3.3. ResponseStatusExceptionResolver
Bu handler Spring 3.0'da tanıtıldı ve default olarak DispatcherServlet'te etkin.
@ ResponseStatus Response statuslerine göre Custom exceptionları
implemente edebilmek için geliştirildi.
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10
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13
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15
@ResponseStatus(value = HttpStatus.NOT_FOUND)
public class ResourceNotFoundException extends RuntimeException
{
public ResourceNotFoundException() {
super();
}
public ResourceNotFoundException(String message, Throwable
cause) {
super(message, cause);
}
public ResourceNotFoundException(String message) {
super(message);
}
public ResourceNotFoundException(Throwable cause) {
super(cause);
}
}
12. Solution 2 – The HandlerExceptionResolver
3.4. Custom HandlerExceptionResolver
Custom exceptionlarla birlikte body de response a eklendi.
Solution 3 – @ControllerAdvice
a global @ExceptionHandler with the @ControllerAdvice annotation
17. 6.3. REST and Method Level Security
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@ControllerAdvice
public class RestResponseEntityExceptionHandler
extends ResponseEntityExceptionHandler {
@ExceptionHandler({ AccessDeniedException.class })
public ResponseEntity<Object> handleAccessDeniedException(
Exception ex, WebRequest request) {
return new ResponseEntity<Object>(
"Access denied message here", new HttpHeaders(),
HttpStatus.FORBIDDEN);
}
...
}
18. 7. Spring Boot Support
Whitelabel Error Page with errors for browsers
We can provide our own view-resolver mapping for /error, overriding the
Whitelabel Page
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{
"timestamp": "2019-01-17T16:12:45.977+0000",
"status": 500,
"error": "Internal Server Error",
"message": "Error processing the request!",
"path": "/my-endpoint-with-exceptions"
}
19. @Component
public class MyErrorController extends BasicErrorController {
public MyErrorController(ErrorAttributes errorAttributes) {
super(errorAttributes, new ErrorProperties());
}
@RequestMapping(produces = MediaType.APPLICATION_XML_VALUE)
public ResponseEntity<Map<String, Object>> xmlError(HttpServletRequest
request) {
// ...
}
}
20. Spring Retry
Spring Retry, başarısız bir işlemi otomatik olarak yeniden başlatma yeteneği
sağlar. Bu, hataların doğada geçici olabileceği durumlarda yardımcı olur (anlık
bir ağ arızası gibi).
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@Service
public interface MyService {
@Retryable(
value = { SQLException.class },
maxAttempts = 2,
backoff = @Backoff(delay = 5000))
void retryService(String sql) throws SQLException;
...
}
@Retyable
22. RetryTemplate
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5
public interface RetryOperations {
<T> T execute(RetryCallback<T> retryCallback) throws Exception;
...
}
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public interface RetryCallback<T> {
T doWithRetry(RetryContext context) throws Throwable;
}
Spring Retry provides RetryOperations interface which supplies a set
of execute() methods:
The RetryCallback which is a parameter of the execute() is an interface that allows
insertion of business logic that needs to be retried upon failure:
23. RestTemplate Handling
1. Default Error Handling
HttpClientErrorException – in case of HTTP status 4xx
HttpServerErrorException – in case of HTTP status 5xx
UnknownHttpStatusCodeException – in case of an unknown HTTP status
2. Implementing a ResponseErrorHandler
Throw an exception that is meaningful to our application
Simply ignore the HTTP status and let the response flow continue without
interruption
demo
24. @Scheduled
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@Scheduled(fixedDelay = 1000)
public void scheduleFixedDelayTask() {
System.out.println(
"Fixed delay task - " + System.currentTimeMillis() / 1000);
}
@Scheduled(fixedRate = 1000)
public void scheduleFixedRateTask() {
System.out.println(
"Fixed rate task - " + System.currentTimeMillis() / 1000);
}
Be careful about “Out of Memory”.
For configuration: https://www.baeldung.com/spring-
scheduled-tasks