Spring

Sources: https://spring.io/guides, GettingStarted with spring-boot

Enable your box with spring.

#On ubuntu :

sudo apt-get install spring

#On Centos : follow these steps:

1. download -

wget http://repo.spring.io/release/org/springframework/boot/spring-boot-cli/1.1.4.RELEASE/spring-boot-cli-1.1.4.RELEASE-bin.tar.gz

2. untar -

tar xzf spring-boot-cli-1.1.4.RELEASE-bin.tar.gz

3. cd extractedFolder/bin #or set bin folder on path

#Post setup we can use it as follows.

spring version #returns version of installed spring cli

spring init --list #returns list of available project-prototypes, description and dependencies list.

spring init --build=gradle -d=<PROJECT_ID_FROM_LIST> <PROJECT_PATH> #default build is maven. it creates folder(mentioned in PROJECT_PATH) structure and adds dependencies(required for project id) to it.

e.g- to create spring boot application with web-services and cassandra database access capabilities.

spring init --list | grep "cassandra\|web" 

spring init --build=gradle -ddata-cassandra-reactive,web spring_web_cassandra_ex

spring-boot-microservices...

Problem-1: Spring 1.4 : Unable to start embeded default tomcat. Below is ref for specifying diff version of embeded server.

sol: spring.io, in a spring-boot-starter-web project if 'org.apache.hbase:hbase-server:0.98.6-cdh5.3.0' is used then above issue was faced as well. dropped hbase server dependency as it was not in use.

Problem-2: Caused by: java.lang.ClassNotFoundException: org.apache.kafka.streams.StreamsBuilder. using spring-kafka 2.1.5.RELEASE

sol:

One of the key components of Spring Framework is the Aspect oriented programming (AOP) framework. Aspect Oriented Programming entails breaking down program logic into distinct parts called so-called concerns. ref

Difference between @PathVariable & @PathParam.

dependencies {

compile("org.springframework.boot:spring-boot-devtools")

}

Example source codes:

spring-jdbc ,spring boot & angularjs SPA secured,

Spring-data-cassandra: add configuration class extending AbstractCassandraConfiguration annotated with enablecassandrarepositories > add repository interface extending CassandraRepository > add Entitiy class annotatted with @Table > add Accessor class that usesses repository...

Search Text: spring boot cli. create gradle project, create spring project, setup spring project.

Spring profiles. Sources: Tech Primers