Welcome!

Weblogic Authors: Yeshim Deniz, Elizabeth White, Michael Meiner, Michael Bushong, Avi Rosenthal

Related Topics: Java IoT, Machine Learning , Apache

Java IoT: Blog Post

Java Serialization without Serializable Interface

As you know in case of Core Java to serialize an object it is mandatory to implement Serializable interface and serialVersionUID

The title of this article seems unpleasant as it talks about serializing java object graph without the use of Serializable interface. It is true in case of Core Java. We know that to serialize a java bean we have to implement Serializable interface ( let us not consider the Externalizable interface ).In this article I will show how it is possible to serialize a java object without implementing Serializable interface using a library from a famous organisation called Jboss. In this small post I will make you familiar with “Jboss Serialization”.

Technicalities
As you know in case of Core Java to serialize an object it is mandatory to implement Serializable interface and serialVersionUID( optional ). There are certain situations in the project development where we want to serialize the object but that particular object does not implement Serializable interface and we may not have access to the source code. In this case I am not saying that it is impossible to we will find it difficult to serialize the object graph. But the introduction of Jboss Serialization API made it very simple to serialize an object irrespective of the serialization specification.  To use “Jboss Serialization” you have to download the zip file available in jboss site. The link for download is given below in the references section. You have to note that jboss serialization api depends upon two other libraries called “log4j.jar” and “trove.jar”. You have to put the two jar files in the classpath along with “jboss-serialization.jar”. If you are using normal java project you should have three jar files in your library as mentioned below.

log4j.jar

trove.jar

jboss-serialization.jar

If you are using Maven, you have to use the following dependency as mentioned below.

<dependency>

<groupId>jboss</groupId>

<artifactId>jboss-serialization</artifactId>

<version>4.2.2.GA</version>

</dependency>

How to do

Let us consider a very small example of java Object graph ie Organisation object contains Employee object which has name and id as fields. The code is given below.

package com.ddlab.jboss.serilization;

/**

* This is a plain java class with the fields name and id.

*

* @author <a href="mailto:debadatta.mishra@gmail.com"> Debadatta Mishra (PIKU)

* @Since Jan 2013

*/

public class Employee {

private String name;

private String id;

// ~~ Getter and Setter Methods below

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

}

 

 

 

 

package com.ddlab.jboss.serilization;

/**

* This is a plain java class with the field type {@link Employee}.

*

* @author <a href="mailto:debadatta.mishra@gmail.com"> Debadatta Mishra (PIKU)

* @Since Jan 2013

*/

public class Organisation {

private Employee emp;

public Employee getEmp() {

return emp;

}

public void setEmp(Employee emp) {

this.emp = emp;

}

}

In the above case you can mark that none of the classes implement Serializable interface. Ok, that’s great. To use jboss serialization and deserialization only replace “ObjectOutputStream” to “JBossObjectOutputStream” and “ObjectInputStream” to “JbossObjectInputStream”. Let us see concrete example code below.

package com.ddlab.jboss.serilization;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import org.jboss.serial.io.JBossObjectInputStream;

import org.jboss.serial.io.JBossObjectOutputStream;

/**

* This is a testharness class used to serialize and deserialize the object.

*

* @author <a href="mailto:debadatta.mishra@gmail.com"> Debadatta Mishra (PIKU)

* @Since Jan 2013

*/

public class TestJbossSerilization {

public static void storeObject(Organisation org, String filePath) {

JBossObjectOutputStream objOut = null;

OutputStream out = null;

File file = new File(filePath);

try {

out = new FileOutputStream(file);

} catch (FileNotFoundException e) {

e.printStackTrace();

}

try {

objOut = new JBossObjectOutputStream(out);

objOut.writeObject(org);

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if (objOut != null)

objOut.close();

if (out != null)

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

System.out

.println("Object Organisation is serialized successfully in the path "

+ file.getAbsolutePath());

}

public static void retrieveObject(String filePath) {

InputStream inStream = null;

try {

inStream = new FileInputStream(filePath);

} catch (FileNotFoundException e) {

e.printStackTrace();

}

JBossObjectInputStream objIn = null;

try {

objIn = new JBossObjectInputStream(inStream);

} catch (IOException e) {

e.printStackTrace();

}

Organisation org;

try {

org = (Organisation) objIn.readObject();

System.out.println("Employee Name : " + org.getEmp().getName());

System.out.println("Employee Id : " + org.getEmp().getId());

} catch (IOException e) {

e.printStackTrace();

} catch (ClassNotFoundException e) {

e.printStackTrace();

} finally {

try {

if (objIn != null)

objIn.close();

if (inStream != null)

inStream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

public static void main(String[] args) throws Exception {

String filePath = "data/org.ser";

Organisation org = new Organisation();

Employee emp = new Employee();

emp.setId("111");

emp.setName("Deba");

org.setEmp(emp);

/*

* Serialize the object graph

*/

storeObject(org, filePath);

/*

* De-serialize the object graph

*/

retrieveObject(filePath);

}

}

You can download the complete project from the following link.

https://www.dropbox.com/s/drkl2rqxizt1x3a/jbossserialization.zip

So we have achieved serialization of java object graph without implementing Serializable interface. There are certain benefits of using it.

  1. There is no need to implement Serializable interface.
  2. No need to define serialVersionUID.
  3. Since it uses the concept of smart cloning, the process of serialization if 10 times faster.

Conclusion

I hope you will enjoy my article on serialization. You can download and learn for your personal use only. For any queries contact me on [email protected].

References

http://www.jboss.org/serialization

http://www.jboss.org/file-access/default/members/serialization/downloads/jboss-serialization-1.0.3.GA.zip

http://mvnrepository.com/artifact/jboss/jboss-serialization/4.2.2.GA

http://en.wikipedia.org/wiki/Serialization

More Stories By Debadatta Mishra

Debadatta Mishra is a senior Java developer with five years of experience in the field of Java and related technologies. He has written many articles on Java-related technologies on the Internet.

IoT & Smart Cities Stories
Nicolas Fierro is CEO of MIMIR Blockchain Solutions. He is a programmer, technologist, and operations dev who has worked with Ethereum and blockchain since 2014. His knowledge in blockchain dates to when he performed dev ops services to the Ethereum Foundation as one the privileged few developers to work with the original core team in Switzerland.
René Bostic is the Technical VP of the IBM Cloud Unit in North America. Enjoying her career with IBM during the modern millennial technological era, she is an expert in cloud computing, DevOps and emerging cloud technologies such as Blockchain. Her strengths and core competencies include a proven record of accomplishments in consensus building at all levels to assess, plan, and implement enterprise and cloud computing solutions. René is a member of the Society of Women Engineers (SWE) and a m...
Early Bird Registration Discount Expires on August 31, 2018 Conference Registration Link ▸ HERE. Pick from all 200 sessions in all 10 tracks, plus 22 Keynotes & General Sessions! Lunch is served two days. EXPIRES AUGUST 31, 2018. Ticket prices: ($1,295-Aug 31) ($1,495-Oct 31) ($1,995-Nov 12) ($2,500-Walk-in)
Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life settlement products to hedge funds and investment banks. After, he co-founded a revenue cycle management company where he learned about Bitcoin and eventually Ethereal. Andrew's role at ConsenSys Enterprise is a mul...
Digital Transformation and Disruption, Amazon Style - What You Can Learn. Chris Kocher is a co-founder of Grey Heron, a management and strategic marketing consulting firm. He has 25+ years in both strategic and hands-on operating experience helping executives and investors build revenues and shareholder value. He has consulted with over 130 companies on innovating with new business models, product strategies and monetization. Chris has held management positions at HP and Symantec in addition to ...
The challenges of aggregating data from consumer-oriented devices, such as wearable technologies and smart thermostats, are fairly well-understood. However, there are a new set of challenges for IoT devices that generate megabytes or gigabytes of data per second. Certainly, the infrastructure will have to change, as those volumes of data will likely overwhelm the available bandwidth for aggregating the data into a central repository. Ochandarena discusses a whole new way to think about your next...
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more busine...
All in Mobile is a place where we continually maximize their impact by fostering understanding, empathy, insights, creativity and joy. They believe that a truly useful and desirable mobile app doesn't need the brightest idea or the most advanced technology. A great product begins with understanding people. It's easy to think that customers will love your app, but can you justify it? They make sure your final app is something that users truly want and need. The only way to do this is by ...
DXWorldEXPO LLC announced today that Big Data Federation to Exhibit at the 22nd International CloudEXPO, colocated with DevOpsSUMMIT and DXWorldEXPO, November 12-13, 2018 in New York City. Big Data Federation, Inc. develops and applies artificial intelligence to predict financial and economic events that matter. The company uncovers patterns and precise drivers of performance and outcomes with the aid of machine-learning algorithms, big data, and fundamental analysis. Their products are deployed...