Java Magazine 2015 01-02

18.9 MB·English

by  Oracle

return conferences;
package agenda.simple;
//JANUARY/FEBRUARY 2015 /
public class Activator extends DependencyActivatorBase
@Override
public void destroy(BundleContext ctx, DependencyManager dm)
throws Exception
@Override
public void init(BundleContext ctx, DependencyManager dm)
throws Exception
dm.add(createComponent()
.setInterface(Agenda.class.getName(), null)
.setImplementation(SimpleAgendaService.class));
package agenda.rest;
@Path("agenda")
public class AgendaResource
private volatile Agenda agenda;
@
@Produces(MediaType.APPLICATION_
public List<Conference> listConferences()
package agenda.rest;
return agenda.listConferences();
@Path("agenda")
public class AgendaResource {
private volatile Agenda agenda;
@
@GET
@Produces(MediaType.APPLICATION_JSON)
public List<Conference> listConferences() { @Consumes(MediaType.APPLICATION_
return agenda.listConferences();
} public void addConference(Conference conference)
@POST agenda.addConference(conference.getName(),
@Consumes(MediaType.APPLICATION_JSON)
public void addConference(Conference conference) { conference.getLocation());
agenda.addConference(conference.getName(),
conference.getLocation());

package agenda.rest;
public class Activator extends DependencyActivatorBase
@Override
ORACLE CLOUD public void destroy(BundleContext ctx, DependencyManager dm)
throws Exception
Platform for Innovation
@Override
public void init(BundleContext ctx, DependencyManager dm)
throws Exception
dm.add(createComponent()
.setInterface(Object.class.getName(), null)
Java-based services provide flexible tools for developing
.setImplementation(AgendaResource.class)
.add(createServiceDependency()
and deploying new applications in the cloud
.setService(Agenda.class)));
ORACLE.COM/JAVAMAGAZINE
//table of contents /
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05 20 32
PLATFORM FOR
MAKING GET STARTED N
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INNOVATION WATER SAFE WITH ORACLE TI
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A Java-based mobile DEVELOPER A
app helps Safe Water CLOUD SERVICE N
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Kenya provide clean A
Harshad Oak shows you V
Oracle’s Mike Lehmann discusses water to rural families. A
how to run your enire J
Java-based cloud services for the
development environ-
full development lifecycle.
ment in the cloud.
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Cloud V
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Computing J
New theme icon. See how it works.
COVER ART BY I-HUA CHEN
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COMMUNITY JAVA TECH 37 47
03 25 Enterprise Java Rich Client
From the Editor Career Building Modular Cloud Cloud-Based Monitoring
Three Steps to Applications in Java of IoT Devices
11
Improve Your Career Add, replace, or remove modules Johan Vos demonstrates a performant and
Java Nation
Bruno Souza and Edson Yanaga share while keeping the architecture scalable cloud-based monitoring system for
News, people, events, and books
tips to boost your skills and network. intact and maintainable. collecting data from embedded devices.
JAVA IN ACTION 28 42 52
18 New to Java Enterprise Java Embedded
IoT Developer Code Java on the Concurrent Programming Get Started with Oracle Java ME
blog
Challenge Winner Raspberry Pi, Part 2 with Java EE 7 and Java SE 8 Embedded 8 on Microcontrollers
Bot-So Access Raspberry Pi hardware Adam Bien shows you how to run Access peripherals using the Device I/O
interactively with BlueJ. Java EE 7 applications on Java SE 8. API of Oracle Java ME Embedded.
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EDITORIAL PUBLISHING
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Editor in Chief Publisher
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Caroline Kvitka Jennifer Hamilton +1.650.506.3794
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3 Billion
Community Editor Associate Publisher and Audience
Yolande Poirier Development Director
Java in Action Editor Karin Kinnear +1.650.506.1985
Michelle Kovac N
ADVERTISING SALES O
Technology Editor President, Sprocket Media TI
Tori Wieldt Kyle Walkenhorst +1.323.340.8585 C
Contributing Writer A
Kevin Farnham Western and Central US, LAD, and N
Canada, Sprocket Media I
Contributing Editors Tom Cometa +1.510.339.2403 A Devices Run Java
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Claire Breen, Blair Campbell,
Eastern US and EMEA/APAC, A
Kay Keppler, Karen Perkins J
Sprocket Media
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Senior Design Director Mailing-List Rentals C
Suemi Lam Contact your sales representative. E
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Design Director RESOURCES A
Richard Merchán V
Oracle Products A
Contributing Designers +1.800.367.8674 (US/Canada) J
Jaime Ferrand, Diane Murray, ATMs, Smartcards, POS Terminals, Blu-ray Players,
Oracle Services
Arianna Pucherelli
+1.888.283.0591 (US)
Production Designers
Set Top Boxes, Multifunction Printers, PCs, Servers,
Sheila Brennan, Kathy Cygnarowicz Oracle Press Books
oraclepressbooks.com
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Copyright © 2015, Oracle and/or its affiliates. All Rights Reserved. No part of this publication may be reprinted or otherwise
reproduced without permission from the editors. JAVA MAGAZINE IS PROVIDED ON AN “AS IS” BASIS. ORACLE EXPRESSLY
DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED. IN NO EVENT SHALL ORACLE BE LIABLE FOR ANY #1 Development Platform
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products remains at the sole discretion of Oracle. Oracle and Java are registered trademarks of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective owners.
Java Magazine is published bimonthly with a free subscription price by
Oracle, 500 Oracle Parkway, MS OPL-3C, Redwood City, CA 94065-1600.
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//from the editor /
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ools make the cloud. To support modern development, today’s cloud development environments
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must support the full sotware development lifecycle. Developers working in the cloud need tools for builds, T
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coninuous integraion, source control, and team collaboraion. With those tools at the V
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Cloud J
ready, they can take advantage of the cloud as a platform for innovaion.
Computing
In our interview with Mike Lehmann, vice president of product management for Oracle
Cloud Applicaion Foundaion, we explore Oracle’s Java-based cloud services for developers, and the beneits
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they ofer. “Taking a new business idea and building an applicaion to support it can be done much more quickly U
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and with lower risk than in the past,” says Lehmann. Read the interview for his insights on Oracle Java Cloud U
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Service, Oracle Developer Cloud Service, and other services that give developers an end-to-end Java develop- B
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ment and deployment environment.
Ready to test out these services? Don’t miss Hardshad Oak’s aricle, “Get Started with Oracle Developer Cloud
Service.” Plus, Bert Ertman shows you how to build modular cloud applicaions in Java.
It’s a new year, and a ime when people tradiionally think about self-improvement.
//send us your feedback /
If you are looking to raise your job prospects and expand your network, Bruno Souza
and Edson Yanaga have just the plan for you, and it includes code, community, and— We’ll review all
suggesions for future
yes—cloud. Their acion items will help you to raise your possibiliies for the future.
improvements.
Finally, this will be my last issue as editor in chief of Java Magazine. I want to thank
Depending on volume,
you, the readers, for your enthusiasic support of the magazine. Lots of great content
some messages might
is in the works for 2015, so please keep reading (and coding). not get a direct reply. blog
Caroline Kvitka, Editor in Chief BIO
PHOTOGRAPH BY BOB ADLER 03
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FOR INNOVATION A
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The Oracle Cloud platform’s Java-based services provide T
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flexible tools for developing and deploying new applications. V
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BY CAROLINE KVITKA
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Cloud T
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Computing O
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C loud compuing presents a vaion, cost savings, and producivity
growing number of oppor- for Java developers?
tuniies and services for Lehmann: The emergence of the
developers, especially in cloud is changing how develop-
terms of simplicity, producivity, ers and administrators work with
and innovaion. We sat down with sotware and hardware. Efecively
Mike Lehmann, vice president of what you’re able to get now in a
Mike Lehmann,
product management for Oracle dramaically simpliied fashion is
vice president
Cloud Applicaion Foundaion, to instant access to compute capacity
of product
talk about what’s new in the Oracle and enterprise sotware in the cloud.
management
blog
Cloud platform for developers. That changes the equaion for devel- for Oracle Cloud
opers and companies building appli- Application
Java Magazine: What does the rise caions. Taking a new business idea Foundation
of cloud compuing mean for inno- and building an applicaion to sup-
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THE FLEXIBILITY TO INNOVATE
“ You have a true end-to-end Java development and deployment N
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environment with a huge amount of flexibility and opportunity C
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to build innovative applications.”
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cally was called middleware Oracle Developer Cloud Service, A
on premises. With Oracle which works hand in hand with Oracle V
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Cloud, developers can focus Java Cloud Service, provides a full devel-
on building and deploy- opment lifecycle platform. It includes
ing rather than deciding on a Git repository and a Hudson build
platform infrastructure and system, for source code management
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trying to get it installed and to support a coninuous integraion
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set up. approach. It’s integrated with standard U
Anand Kothari, director of product management at Oracle, and Lehmann work O
Java Magazine: What Oracle development tools such as Eclipse and B
on cloud architecture documents. A
Cloud services are available Oracle JDeveloper, and it features col-
for developers? laboraion tools including a built-in wiki,
port it can be done much more quickly Lehmann: Our Java-based cloud ofer- issue tracking, and team management.
and with lower risk than in the past. ings start with Oracle Java Cloud We are also complemening Oracle
The cloud is also changing how Service, which enables developers Java Cloud Service with several core
developers architect applicaions. For to get a Java EE server provisioned in platform services.
example, suppose I want to build a Java minutes. The resuling server is a user- First, Oracle Messaging Cloud Service
applicaion with a mobile front end, use deined cluster of Java infrastructure, enables you to build messaging appli-
caching for performance and queuing with lifecycle management cloud tools caions based on JMS [Java Message
services for integraion, and include a that enable backups, recovery, patch- Service] queues and topics in the cloud.
standard SQL back end for persistence. ing, scale-in, and scale-out. The under- It can be used in client applicaions
blog
Already today, that is simply a col- lying infrastructure is Oracle WebLogic through a REST API as well as a naive
lecion of services available in Oracle Server, our standards-based, market- Java API.
Cloud for developers to use as needed. leading applicaion server. And you can Next, the Oracle Coherence caching
It is a next-generaion paradigm for plug directly into Oracle Database Cloud capability caches Java objects in mem-
what we used to do in what histori- Service for persistence. ory. This is a new extension of Oracle
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Java Cloud Service using a capability of business intelligence, you have a true Lehmann: We’re building out the full
Oracle WebLogic Server called Managed end-to-end Java development and applicaion lifecycle management
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Coherence Servers and will be available deployment environment with a huge infrastructure with Oracle Developer O
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in 2015. amount of lexibility and opportunity to Cloud Service, to answer the quesions
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In 2015, we’ll also have Oracle Java build innovaive applicaions. “How do I build?,” “How do I manage
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SE Cloud Service, which is the Java Java Magazine: Would you say that the source code?,” and “How do I man- A I
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Virtual Machine [JVM] in the cloud, Oracle is trying to give developers age my development team?” On the A
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because many of our customers want everything they need for the way that deployment side, with our Java cloud
to build standard JVM-based applica- they want to work? services, we’re providing a very rich,
ions. They might be using a popular H
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Java framework such as Spring on Java,
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or they might even be using one of the A
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popular emerging Java-based scriping
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languages such as Play. Oracle Java SE
MODERN THINKING
“ [The cloud] Cloud Service, like Oracle Java Cloud
Service, enables direct integraion into
definitely is
the large Oracle Cloud ecosystem with
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changing how Oracle Developer Cloud Service, Oracle
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Java Cloud Service, Oracle Database U
people construct O
Cloud Service, and other services. B
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applications
We are also very aware of the rise of
server-side JavaScript soluions such as
because they have
Node.js and so, in parallel with Oracle
an integrated team
Java SE Cloud Service, we are build-
environment that ing out Oracle Node Cloud Service,
for availability in 2015. This will bring
can provision a
a irst-class JavaScript server and,
test environment with Oracle Developer Cloud Service,
a JavaScript development soluion to
incredibly fast.”
Oracle Cloud, making it easy to build
and deploy such soluions paired with
blog
our Java cloud services and integrated
with our database cloud service.
As you can see, even without going
into the higher-level services for mobil- Nilesh Junnarkar, director of software development at Oracle, talks with Lehmann about
ity, integraion, and document and load balancer provisioning.
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chosen to add in a caching layer, then trends and styles for doing develop-
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you’ll get a mulinode Oracle Coherence ment for some ime. It’s giving a con-
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cluster. And inally, you’re backed by an inuous integraion soluion out of the A I
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Oracle database. So for a developer you box and enabling you to even consider A
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get both sides—team development; coninuous delivery models.
coninuous integraion; and a full- What is a litle bit diferent now in the
ledged, producion-quality deployment cloud is that previously you had to set H
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infrastructure. that up. And there was complexity with
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A classic example that you would use it. In the cloud, we give you that envi- A
even in that scenario is you might have ronment out of the box. It deinitely is V
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a layer in front of your Java applicaion changing how people construct applica-
layer, perhaps using a Node.js front end ions, because they have an integrated
where you’re shaping some of the JSON team environment that can provision
objects that you want for your front-end a test environment incredibly fast—or,
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HTML5 applicaions. Architecturally, more likely, in a test environment they
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without a lot of efort, you can bring can provision, test, and tear down very U
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these muliier architectures together quickly. These capabiliies are simply B
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in interesing ways that previously part of the environment versus being
would have taken weeks or maybe even something you spend a huge amount of
months, depending on the complexity investment seing up. It truly is a mod-
of your IT environment. Now it’s basi- ern development paradigm.
cally on demand. So it really changes Java Magazine: Are people more com-
how you think about your applicaions fortable these days moving to public
and how you architect your applicaions. cloud?
You’re geing an enterprise-quality Lehmann: There has been the sort of
Oracle is building muliiered topology that you typically soluion out of the box from Oracle. ongoing debate around public cloud
out a full application
have in an applicaion but doing it in Java Magazine: How do these services versus private cloud, and my sense is
development lifecycle
an almost transparent way. When you support modern development? that this debate will slowly go away. I
management
blog
ask for a mulinode Oracle Java Cloud Lehmann: The use of build integraions can see already in our customers when
infrastructure with
Service cluster for high availability and systems such as Hudson, combined we talk about the cloud that more and
Oracle Developer
higher throughput, what you also typi- with Maven for dependency manage- more people are becoming very com-
Cloud Service,
says Lehmann. cally get is a sotware load balancer in ment and Git for source code manage- fortable with moving development
front of this environment. If you’ve ment, has been an emerging set of and test to the cloud, but keeping their
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producion workloads on premises. I the Java Community Process around it Lehmann: I think it’s an exciing
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think that’s just part of the shit. Two for standardizing it and managing the change how all these services can be so
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years ago, they weren’t going to do any- overall technical standards. There is easily used together to build new types A I
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thing in the public cloud. Now, it’s dev industry consensus around Java, that it of applicaions that simply weren’t pos- A
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and test. In another couple of years, as is the standard programming language sible or were enormously complex in
people start trusing and believing that and programming environment that the past. When you start bringing in
these are secure, scalable, enterprise- most people use in the cloud. That is big data, social, and mobile services to H
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class environments, they’ll start moving complemented by a compeiive server- the cloud as standard irst-class, easily
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producion workloads. side industry. So as a customer, you accessible services, it gets even more A
Java Magazine: Why is Java the best lan- have both innovaion and a compeiive interesing. Rather than building appli- V
Kothari and Lehmann A
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work on an Oracle guage and platform for the cloud? marketplace. And that simply carries caions centered around one service,
Java Cloud Service Lehmann: Java is efecively a commu- over into the cloud. If you look at most modern applicaions will be built on top
component diagram. nity standard. The Java language has of the cloud environments, the vast of a collecion of cloud services in stan-
majority of them are building infra- dard architectural paterns. And to me
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structure on Java because that is the this new style of applicaion develop-
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lingua franca of most developers today. ment and applicaion architecture based U
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Java Magazine: What makes Oracle’s on paterns of services working together B
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cloud platform unique? is going to rapidly emerge as the most
Lehmann: I think the big diferenia- exciing space to be in for the future.
tor is that we bring two things together. Very diferent and unique applicaions
First, we are the steward of Java so doing things that have never been done
we are fairly aggressively bringing the in the past will emerge out of this. I
most-recent releases of the Java plat- know I am prety excited to paricipate
form into the cloud. and watch it happen! </article>
Second, one of the cool things that’s
diferent about what Oracle does in MORE ON TOPIC:
the cloud is that we are not only taking Cloud
enterprise-class sotware to the cloud Computing
blog
that our customers run mission-criical
businesses on, but we’re making doing
LEARN MORE
that super simple in the cloud.
Java Magazine: What’s your vision for • Oracle Java Cloud Service
cloud development? • Oracle Developer Cloud Service
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