What's new with Spring!

Created by Michael T Minella / @michaelminella

Who is this guy?

Project lead for Spring Batch
Author of Pro Spring Batch
Member of the expert group for JSR-352
Twitter: @michaelminella

What is this about?

Spring I/O
Spring
Spring Boot
Spring XD

Spring I/O

New Website

?

Spring

Spring 4

When was Spring released?

Spring is almost 10 years old

Only reved the major version two other times.

What's in Spring 4?

Updates to all major dependencies
Pruning of depricated features
Groovy based configuration
Java 8 support
WebSocket support
And much more!

Spring and the JVM

Java, Scala, Groovy, etc

Spring and Scala


class ServiceConfiguration extends FunctionalConfiguration {
	importClass(classOf[DataSourceConfiguration])

	val dataSource:DataSource = getBean("dataSource")

	val jdbcTemplate = bean() {
		new JdbcTemplate(dataSource)
	}

	val jdbcTransactionmanager = bean("txManager") {
		new JdbcTransactionManager(dataSource)
	}
}

Spring and Groovy


import o.sf.jdbc.core.JdbcTemplate
import o.sf.jdbc.datasource.DataSourceTransactionManager

beans {
	jdbcTemplate(JdbcTemplate) {
		dataSource = dataSource
	}

	transactionManager(DataSourceTransactionmanager) {
		dataSource = dataSource
	}
}

Spring and Java


@Configuration
@ComponentScan
@Import(DataSourceConfiguration.class)
@EnableTransactionManagement
class ServiceConfiguration {

	@Bean
	public JdbcTemplate jdbcTemplate(DataSource dataSource) {
		return new JdbcTemplate(dataSource);
	}

	@Bean
	public PlatformTransactionManager jdbcTemplateManager(DataSource dataSource) {
		return new JdbcTransactionManager(dataSource);
	}
}

Spring and Java 8

Method references


private Customer map(ResultSet rs, int rowNum) throws SQLException {
    return new Customer(rs.getString("name"), rs.getInt("age"));
}

private void build(PreparedStatement ps) throws SQLException {
    ps.setString(1, "Mike%");
}

...
jdbcTemplate.query("SELECT name, age FROM customer WHERE name like ?", 
    this::build,
    this::map);
);

Lambdas


JdbcTemplate jt = new JdbcTemplate(dataSource);

jt.query("SELECT name, age FROM person WHERE name like ?", 
    ps -> { ps.setString(1, "Mike%"); },
    (rs, rowNum) -> new Person(rs.getString(1), rs.getInt(2));
);

java.time


public class Customer {
	
	@DateTimeFormat(iso=ISO.DATE)
	private LocalDate birthDate;

	@DateTimeFormat(pattern="M/d/yy h:mm")
	private LocalDateTime lastUpdate;
}

WebSockets

Delegates to app server implementations (Tomcat, Jetty, etc)
Supports Sock.js, a superset of WS
STOMP support over WS
Message API moved from Spring Integration to Spring Core
JSR-356 (javax.websocket.*) support

WebSocket subscription


@Controller
public class PortfolioController {
    ...
	@MessageMapping("/app/trade")
	public void executeTrade(Trade trade, Principal principal) {
	    trade.setUsername(principal.getName());
	    this.tradeService.executeTrade(trade);
	}

	@SubscribeEvent("/app/positions")
	public List<PortfolioPosition> subscribeToPortfolios(Principal principal) {
	    String user = principal.getName();
	    Portfolio portfolio = this.portfolioService.findPortfolio(user);
	    return portfolio.getPositions();
	}
}

Spring in JEE

Full support for EE 7
- Date/Time
- JTA 1.2
- JMS 2.0
- JPA 2.1
- Bean validation 1.1
- Concurrency (JSR-236)
- Servlet 3.1
- WebSockets (JSR-356)
Participated in JSR-356 and JSR-352

?

Spring Boot

Spring Opinionated

Goals of Spring Boot

Radically faster getting started experience
Be opinionated out of the box...
...but get out of the way as requirements diverge
Zero code generation or XML

Demo

Spring Boot

Maximizes productivity
Minimizes boilerplate code
Makes Spring fun!

Who uses this in production?

We do!

Spring.io

Nearly a million unique visitors a month
Aprox 5 million page views a month

?

Spring XD

Big Data Challenges...

Building Big Data applications is too complex
Low level coding experience that require lots of boilerplate code
Numerous domains to bridge
Inconsistent APIs

...Are Integration Challenges

Big Data Terminology	Integration Terminology
Data flow model Source, Channel, Sink	EIP Patterns Adapter, Channel, Filter, Transformer, etc.
Workflow Orchestration Workflow, Action	Batch Processing Job, Step
Export Jobs, Connectors	Batch Processing Jobs, Readers/Writers