Skip to Main Content
Java Enterprise Best Practices
book

Java Enterprise Best Practices

by O'Reilly Java Authors
December 2002
Intermediate to advanced content levelIntermediate to advanced
288 pages
9h 46m
English
O'Reilly Media, Inc.
Content preview from Java Enterprise Best Practices

Always Unit-Test Marshalling Code

Because marshalling in RMI is always based on streams, it’s very easy to write unit tests for your marshalling code. And doing so can save you a lot of headaches as you modify your codebase. All you need to do is use streams that map to byte arrays in memory. For example, the following code creates a deep copy of an object and then makes sure the deep copy is equal to the original instance:

public static boolean testSerialization(Serializable object) throws Exception {
	Object secondObject = makeDeepCopy(object);
	boolean hashCodeComparison = (object.hashCode() == secondObject.hashCode(  ));
	boolean equalsComparison = object.equals(secondObject);
	return hashCodeComparison && equalsComparison;
}

private static object makeDeepCopy(Serializable object) throws Exception{
	ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(  );
	ObjectOutputStream objectOutputStream = new
         ObjectOutputStream(byteArrayOutputStream);
	objectOutputStream.writeObject(object);
	objectOutputStream.flush(  );
	byte[] bytes = byteArrayOutputStream.toByteArray(  );
	ByteArrayInputStream byteArrayInputStream= new ByteArrayInputStream(bytes);
	ObjectInputStream objectInputStream = new 
         ObjectInputStream(byteArrayInputStream);
	SerializationTest deepCopy = (SerializationTest) objectInputStream.readObject(  );
	return deepCopy;
}

If you insert tests for each value object in your codebase, and then run them occasionally (for example, as unit tests in either Cactus or JUnit), you’ll ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Moving to Java 9: Better Design and Simpler Code

Moving to Java 9: Better Design and Simpler Code

Trisha Gee
Java EE 8 High Performance

Java EE 8 High Performance

Romain Manni-Bucau

Publisher Resources

ISBN: 0596003846Supplemental ContentErrata Page