Keep on Keeping on !!: Spring Boot

Spring Boot :

-------------------

Spring boot is one of the module in Spring Framework.
The main intensive/objective of the Spring Boot is to make spring application development easier.

To Develop any web application using Spring

create maven web app project.
Add dependencies from required spring module.

Spring-core
Spring - Context
Spring - web mvc
spring - web
Spring JDBC
Spring ORM
Spring JPA
Javax Validation

For ex - Spring 4.x ------ Hibernate 4.x , if we get ClassNotFoundException --

It is very difficult to developer to identify exact versions of jars and their

dependencies in maven.

3. Configure web.xml

4. Configure Dispatcher-servlet.xml

-> View Resolver.

-> Resources

--> Default Servlet Handler.

--> Component Scan for controller.

5. Root Context for Specific Spring Configuration.

6. Controllers

@Controller or @RestController or extends Controller.

Note : To develop any web application in spring, 1 to 5 steps will be same .

--> application to application business logic will be changed.

There are some drawbacks in spring, and using spring framework, we can overcome those drawbacks.

Complexities in Spring Framework :-

Lot of Manual configuration is required. --- XML or java config or Autowired.
Dependency Management is too hard. -- Adding manual jars and their dependencies.
Difficult for new comers to try out spring features --

They understand how to configure beans what are the jars they are using.

Lot of Manual Configuration :

Make J2EE Application Development is easier.

Dependency Injection
Aspect Oriented Programming

All these needs some manual configurations

Bean declaration
Dispatcher Servlet
DatsSource etc..

We need to configure these in xml based or java config base.

Lighter in terms of code, but heavy weight with configuration.

Effort to make easier

Started with XML
Java Configuration and Annotations.
Autowired and Component Scan.

Dependency Management is Too Hard

To develop any web application spring needs several frameworks and libraries.

JSTL..
Thymeleaf.
Hibernate.
Validator and Implementation.

--> Spring itself split into many jars.

--> Combinations of dependency version.

------------------>" Spring Boot was create to address all above complexities Spring Boot is not replacement of Spring Framework ---------------->>>>

Spring Boot Features

Automatic Configuration.

Spring Boot will take care, how to configure the beans using annotations.

Easy Dependency Management - Spring Boot will be taking care.

Starter pom or parent pom -- 100
Starter dependency - webmvc / dao / orm

CLI tool for quick prototyping

It will be used to implement POC.

Opinionated but highly customizable.
Embeded Server

Traditional Applications develop the code and deploy the code into server.
Using Boot, Develop the code and code will start the server. Server is a part of application

Spring applications without XML configuration
Spring Boot actuator for monitoring metrics.

For eg :

Advantages of Embedded Server :

------------------------------------------

Non Embeded Server

Install the server.
Configure the server with exact configurations as old server.
Deploy the application into new server.

Embeded Server :

Copy the application into any system and just run the application.

Enable Auto configurations

Whenever SpringApplication.run(Application.class, args) ---> runs it will create one container.

https://curl.haxx.se/windows/dl-7.61.1/curl-7.61.1-win64-mingw.zip

http://www.metalinker.org/

D:\practice\curl-7.61.1-win64-mingw>dir

Volume in drive D is DATA

Volume Serial Number is AE01-28AB

Directory of D:\practice\curl-7.61.1-win64-mingw

09/07/2018 09:48 PM <DIR> .

09/07/2018 09:48 PM <DIR> ..

09/07/2018 09:47 PM <DIR> bin

09/05/2018 05:48 AM 62 BUILD-HOMEPAGE.url

09/05/2018 05:48 AM 123 BUILD-README.txt

09/05/2018 05:48 AM 212,264 CHANGES.txt

06/27/2018 03:03 PM 1,103 COPYING-brotli.txt

08/30/2014 10:41 PM 1,928 COPYING-libssh2.txt

09/02/2018 06:52 AM 1,179 COPYING-nghttp2.txt

01/15/2017 05:29 PM 5,302 COPYING-zlib.txt

06/14/2018 02:31 PM 1,110 COPYING.txt

09/07/2018 09:47 PM <DIR> docs

09/07/2018 09:47 PM <DIR> include

09/07/2018 09:47 PM <DIR> lib

08/14/2018 12:45 PM 6,253 LICENSE-openssl.txt

08/27/2018 09:16 AM 19,351 mk-ca-bundle.pl

12/02/2017 11:33 PM 1,659 README.txt

09/05/2018 05:45 AM 10,698 RELEASE-NOTES.txt

12 File(s) 261,032 bytes

6 Dir(s) 856,113,029,120 bytes free

D:\practice\curl-7.61.1-win64-mingw>cd bin

D:\practice\curl-7.61.1-win64-mingw\bin>curl.exe start.spring.io

. ____ _ __ _ _

/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \

( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

\\/ ___)| |_)| | | | | || (_| | ) ) ) )

' |____| .__|_| |_|_| |_\__, | / / / /

=========|_|==============|___/=/_/_/_/

:: Spring Initializr :: https://start.spring.io

This service generates quickstart projects that can be easily customized.

Possible customizations include a project's dependencies, Java version, and

build system or build structure. See below for further details.

The services uses a HAL based hypermedia format to expose a set of resources

to interact with. If you access this root resource requesting application/json

as media type the response will contain the following links:

+-----------------+-----------------------------------------+

| Rel | Description |

+-----------------+-----------------------------------------+

| gradle-build | Generate a Gradle build file |

| gradle-project | Generate a Gradle based project archive |

| maven-build | Generate a Maven pom.xml |

| maven-project * | Generate a Maven based project archive |

+-----------------+-----------------------------------------+

The URI templates take a set of parameters to customize the result of a request

to the linked resource.

+-----------------+------------------------------------------+------------------------------+

| Parameter | Description | Default value |

+-----------------+------------------------------------------+------------------------------+

| applicationName | application name | DemoApplication |

| artifactId | project coordinates (infer archive name) | demo |

| baseDir | base directory to create in the archive | no base dir |

| bootVersion | spring boot version | 2.0.4.RELEASE |

| dependencies | dependency identifiers (comma-separated) | none |

| description | project description | Demo project for Spring Boot |

| groupId | project coordinates | com.example |

| javaVersion | language level | 1.8 |

| language | programming language | java |

| name | project name (infer application name) | demo |

| packageName | root package | com.example.demo |

| packaging | project packaging | jar |

| type | project type | maven-project |

| version | project version | 0.0.1-SNAPSHOT |

+-----------------+------------------------------------------+------------------------------+

The following section has a list of supported identifiers for the comma-separated

list of "dependencies".

+--------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------+

| Id | Description | Required version |

| activemq | Java Message Service API via Apache ActiveMQ | >=1.4.0.RC1 |

| actuator | Production ready features to help you monitor and manage your application | |

| actuator-docs | API documentation for the Actuator endpoints | >=1.3.0.RELEASE and <2.0.0.M1 |

| amqp | Advanced Message Queuing Protocol via spring-rabbit | |

| aop | Create your own Aspects using Spring AOP and AspectJ | |

| artemis | Java Message Service API via Apache Artemis | >=1.3.0.RELEASE |

| azure-active-directory | Spring Security integration with Azure Active Directory for authentication | >=1.5.4.RELEASE |

| azure-keyvault-secrets | Spring value annotation integration with Azure Key Vault Secrets | >=1.5.4.RELEASE |

| azure-storage | Azure Storage service integration | >=1.5.4.RELEASE |

| azure-support | Auto-configuration for Azure Services (service bus, storage, active directory, cosmos DB, key vault and more) | >=1.5.4.RELEASE |

| batch | Spring Batch support | |

| cache | Spring's Cache abstraction | >=1.3.0.RELEASE |

| camel | Integration using Apache Camel | >=1.4.0.RELEASE |

| cloud-aws | AWS native services from spring-cloud-aws | >=1.2.3.RELEASE |

| cloud-aws-jdbc | Relational databases on AWS with RDS and spring-cloud-aws-jdbc | >=1.2.3.RELEASE |

| cloud-aws-messaging | Messaging on AWS with SQS and spring-cloud-aws-messaging | >=1.2.3.RELEASE |

| cloud-bus | A simple control bus using Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ) | >=1.2.3.RELEASE |

| cloud-cloudfoundry-discovery | Service discovery with Cloud Foundry | >=1.3.0.RELEASE |

| cloud-config-client | spring-cloud-config Client | >=1.2.3.RELEASE |

| cloud-config-server | Central management for configuration via a git or svn backend | >=1.2.3.RELEASE |

| cloud-connectors | Simplifies connecting to services in cloud platforms, including spring-cloud-connector and spring-cloud-cloudfoundry-connector | >=1.2.0.RELEASE |

| cloud-contract-stub-runner | Stub Runner for HTTP/Messaging based communication. Allows creating WireMock stubs from RestDocs tests | >=1.4.0.RC1 |

| cloud-contract-verifier | Test dependencies required for autogenerated tests | >=1.4.0.RC1 |

| cloud-eureka | Service discovery using spring-cloud-netflix and Eureka | >=1.2.3.RELEASE |

| cloud-eureka-server | spring-cloud-netflix Eureka Server | >=1.2.3.RELEASE |

| cloud-feign | Declarative REST clients with spring-cloud-netflix Feign | >=1.2.3.RELEASE |

| cloud-function | Functions as Spring Beans | >=2.0.2.RELEASE |

| cloud-gateway | Intelligent and programmable routing with the reactive Spring Cloud Gateway | >=2.0.0.M5 |

| cloud-gcp | Support for Google Cloud Platform services | >=2.0.0.RELEASE |

| cloud-gcp-pubsub | Publish to and subcribe from Google Cloud Pub/Sub topics | >=2.0.0.RELEASE |

| cloud-gcp-storage | Access Google Cloud Storage objects | >=2.0.0.RELEASE |

| cloud-hystrix | Circuit breaker with spring-cloud-netflix Hystrix | >=1.2.3.RELEASE |

| cloud-hystrix-dashboard | Circuit breaker dashboard with spring-cloud-netflix Hystrix | >=1.2.3.RELEASE |

| cloud-oauth2 | OAuth2 and distributed application patterns with spring-cloud-security | >=1.2.3.RELEASE |

| cloud-ribbon | Client side load balancing with spring-cloud-netflix and Ribbon | >=1.2.3.RELEASE |

| cloud-security | Secure load balancing and routing with spring-cloud-security | >=1.2.3.RELEASE |

| cloud-starter | spring-cloud-context (e.g. Bootstrap context and @RefreshScope) | >=1.2.3.RELEASE |

| cloud-starter-consul-config | Configuration management with Hashicorp Consul | >=1.3.0.RELEASE |

| cloud-starter-consul-discovery | Service discovery with Hashicorp Consul | >=1.3.0.RELEASE |

| cloud-starter-sleuth | Distributed tracing via logs with spring-cloud-sleuth | >=1.3.0.RELEASE |

| cloud-starter-vault-config | Configuration management with HashiCorp Vault | >=1.5.3.RELEASE |

| cloud-starter-zipkin | Distributed tracing with an existing Zipkin installation and spring-cloud-sleuth-zipkin. Alternatively, consider Sleuth Stream. | >=1.3.0.RELEASE |

| cloud-starter-zookeeper-config | Configuration management with Zookeeper and spring-cloud-zookeeper-config | >=1.3.0.RELEASE |

| cloud-starter-zookeeper-discovery | Service discovery with Zookeeper and spring-cloud-zookeeper-discovery | >=1.3.0.RELEASE |

| cloud-stream | Messaging microservices with Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ) | >=1.3.0.RELEASE |

| cloud-task | Task result tracking and integration with Spring Batch | >=1.3.0.RELEASE |

| cloud-turbine | Circuit breaker metric aggregation using spring-cloud-netflix with Turbine and server-sent events | >=1.2.3.RELEASE |

| cloud-turbine-stream | Circuit breaker metric aggregation using spring-cloud-netflix with Turbine and Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ) | >=1.3.0.RELEASE |

| cloud-zuul | Intelligent and programmable routing with spring-cloud-netflix Zuul | >=1.2.3.RELEASE |

| codecentric-spring-boot-admin-client | Register your application with a Spring Boot Admin instance | >=1.5.9.RELEASE |

| codecentric-spring-boot-admin-server | An admin interface for Spring Boot applications | >=1.5.9.RELEASE |

| configuration-processor | Generate metadata for your custom configuration keys | >=1.2.0.RELEASE |

| cxf-jaxrs | RESTful Web Services framework with support of JAX-RS | >=1.4.0.RELEASE |

| data-cassandra | Cassandra NoSQL Database, including spring-data-cassandra | >=1.3.0.RC1 |

| data-cassandra-reactive | Cassandra NoSQL Database, including spring-data-cassandra and the reactive driver | >=2.0.0.M1 |

| data-couchbase | Couchbase NoSQL database, including spring-data-couchbase | >=1.4.0.RELEASE |

| data-couchbase-reactive | Couchbase NoSQL database, including spring-data-couchbase and the reactive driver | >=2.0.0.M7 |

| data-elasticsearch | Elasticsearch search and analytics engine including spring-data-elasticsearch | |

| data-gemfire | GemFire distributed data store including spring-data-gemfire | >=1.1.0.RELEASE and <2.0.0.M1 |

| data-jpa | Java Persistence API including spring-data-jpa, spring-orm and Hibernate | |

| data-ldap | LDAP support, including spring-data-ldap | >=1.5.0.RC1 |

| data-mongodb | MongoDB NoSQL Database, including spring-data-mongodb | |

| data-mongodb-reactive | MongoDB NoSQL Database, including spring-data-mongodb and the reactive driver | >=2.0.0.M1 |

| data-neo4j | Neo4j NoSQL graph database, including spring-data-neo4j | >=1.4.0.RELEASE |

| data-redis | Redis key-value data store, including spring-data-redis | |

| data-redis-reactive | Redis key-value data store, including spring-data-redis | >=2.0.0.M7 |

| data-rest | Exposing Spring Data repositories over REST via spring-data-rest-webmvc | |

| data-rest-hal | Browsing Spring Data REST repositories in your browser | >=1.3.0.RELEASE |

| data-solr | Apache Solr search platform, including spring-data-solr | |

| derby | Apache Derby database (with embedded support) | >=1.2.2.RELEASE |

| devtools | Spring Boot Development Tools | >=1.3.0.RELEASE |

| flapdoodle-mongo | Embedded MongoDB for testing | >=1.3.0.RELEASE |

| flyway | Flyway Database Migrations library | |

| freemarker | FreeMarker templating engine | |

| groovy-templates | Groovy templating engine | |

| h2 | H2 database (with embedded support) | |

| hateoas | HATEOAS-based RESTful services | >=1.2.2.RELEASE |

| hsql | HSQLDB database (with embedded support) | |

| integration | Common spring-integration modules | |

| jdbc | JDBC databases | |

| jersey | RESTful Web Services framework with support of JAX-RS | >=1.2.0.RELEASE |

| jooq | Persistence support using Java Object Oriented Querying | >=1.3.0.RELEASE |

| kafka | Kafka messaging support using Spring Kafka | >=1.5.0.RC1 |

| kafka-streams | Support for building stream processing applications with Apache Kafka Streams | >=2.0.0.RELEASE |

| keycloak | Keycloak integration, an open source Identity and Access Management solution. | >=1.5.3.RELEASE |

| liquibase | Liquibase Database Migrations library | |

| lombok | Java annotation library which helps to reduce boilerplate code and code faster | |

| mail | Send email using Java Mail and Spring Framework's JavaMailSender | >=1.2.0.RC1 |

| mobile | Simplify the development of mobile web applications with spring-mobile | >=1.0.0.RELEASE and <2.0.0.M1 |

| mustache | Mustache templating engine | >=1.2.2.RELEASE |

| mybatis | Persistence support using MyBatis | |

| mysql | MySQL JDBC driver | |

| open-service-broker | Create service brokers that conform to the Open Server Broker API specification | >=2.0.0.RELEASE |

| postgresql | PostgreSQL JDBC driver | |

| quartz | Schedule jobs using Quartz | >=2.0.0.M2 |

| ratpack | Spring Boot integration for the Ratpack framework | >=1.2.0.RELEASE and <2.0.0.M1 |

| reactive-cloud-stream | Reactive messaging microservices with Spring Cloud Stream (requires a binder, e.g. Kafka or RabbitMQ) | >=2.0.0.RC2 |

| restdocs | Document RESTful services by combining hand-written and auto-generated documentation | |

| retry | Provide declarative retry support via spring-retry | >=1.3.0.RELEASE |

| scs-circuit-breaker | Hystrix circuit breaker on Pivotal Cloud Foundry | >=1.3.0.RELEASE |

| scs-config-client | Config client on Pivotal Cloud Foundry | >=1.3.0.RELEASE |

| scs-service-registry | Eureka service discovery on Pivotal Cloud Foundry | >=1.3.0.RELEASE |

| security | Secure your application via spring-security | |

| session | API and implementations for managing a userΓÇÖs session information | >=1.3.0.RELEASE |

| spring-shell | Build shell-based clients | >=1.5.0.RELEASE |

| sqlserver | Microsoft SQL Server JDBC driver | >=1.5.0.RC1 |

| statemachine | Build applications using state machine concepts | >=2.0.0.RC1 |

| thymeleaf | Thymeleaf templating engine | |

| vaadin | Vaadin java web application framework | >=1.2.0.RELEASE |

| validation | JSR-303 validation infrastructure (already included with web) | >=1.3.0.RELEASE |

| web | Full-stack web development with Tomcat and Spring MVC | |

| web-services | Contract-first SOAP service development with Spring Web Services | |

| webflux | Reactive web development with Netty and Spring WebFlux | >=2.0.0.M1 |

| websocket | Websocket development with SockJS and STOMP | |

Examples:

To create a default demo.zip:

$ curl https://start.spring.io/starter.zip -o demo.zip

To create a web project using Java 10:

$ curl https://start.spring.io/starter.zip -d dependencies=web \\

-d javaVersion=10 -o demo.zip

To create a web/data-jpa gradle project unpacked:

$ curl https://start.spring.io/starter.tgz -d dependencies=web,data-jpa \\

-d type=gradle-project -d baseDir=my-dir | tar -xzvf -

To generate a Maven POM with war packaging:

$ curl https://start.spring.io/pom.xml -d packaging=war -o pom.xml

Keep on Keeping on !!

Friday, September 7, 2018

Spring Boot

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