Liviu Tudor liviutudor

Technologist. MarTech. Growth at scale. Speaker. Advisor. Large scale systems, growth at scale, MarTech, personalization. Silicon Valley. Ex-Netflix.

liviutudor / ReadJarManifest.java

Created November 21, 2019 07:41

How to read own manifest file and get version number

	URLClassLoader cl = (URLClassLoader) App.class.getClassLoader();
	URL url = cl.findResource("META-INF/MANIFEST.MF");
	Manifest manifest = new Manifest(url.openStream());
	Attributes attr = manifest.getMainAttributes());
	System.out.println(manifest.getMainAttributes().getValue("Implementation-Title"));

liviutudor / DelegationBean.groovy

Created October 31, 2017 05:58

after handcrafting the comparison in the beans we are delegating to

	package delegation

	import groovy.transform.Sortable

	class DelegationBean {
	@Delegate
	BeanOne person

	@Delegate
	BeanTwo dateOfBirth

liviutudor / BeanTwo.groovy

Created October 31, 2017 05:57

Bean two with handcrafted comparison

	package delegation

	import groovy.transform.TupleConstructor

	@TupleConstructor
	class BeanTwo implements Comparable<BeanTwo> {
	int yob

	public int getAge() {
	new Date().year - yob

liviutudor / BeanOne.groovy

Created October 31, 2017 05:56

Groovy bean one with handcrafted comparison

	package delegation

	import groovy.transform.TupleConstructor

	@TupleConstructor
	class BeanOne implements Comparable<BeanOne> {
	String firstName
	String familyName

	public String getFullName() {

liviutudor / DelegationBean.groovy

Last active September 22, 2017 05:48

Aggregation 2 classes with @DeleGate

	class DelegationBean {
	@Delegate
	BeanOne person

	@Delegate
	BeanTwo dateOfBirth

	static void main(String... args) {
	DelegationBean one = new DelegationBean(person: new BeanOne("Liviu", "Tudor"), dateOfBirth: new BeanTwo(yob: 1975))
	DelegationBean two = new DelegationBean(person: new BeanOne("William", "Shakespeare"), dateOfBirth: new BeanTwo(yob: 1564))

liviutudor / BeanTwo.groovy

Created September 21, 2017 05:46

Using @DeleGate in groovy, second bean

	import groovy.transform.Sortable
	import groovy.transform.TupleConstructor

	@Sortable
	@TupleConstructor
	class BeanTwo {
	int yob

	public int getAge() {
	new Date().year - yob

liviutudor / BeanOne.groovy

Created September 21, 2017 05:45

Using @DeleGate in groovy, first bean

	import groovy.transform.Sortable
	import groovy.transform.TupleConstructor

	@Sortable
	@TupleConstructor
	class BeanOne {
	String firstName
	String familyName

	public String getFullName() {

liviutudor / JacksonBean.java

Created September 16, 2017 00:47

Usage of ConstructorProperties annotation when removing setters and zero-args constructor

	import java.beans.ConstructorProperties;

	public class JacksonBean {
	private final int value;
	private final String another;

	@ConstructorProperties({"value", "another"})
	public JacksonBean(int value, String another) {
	this.value = value;
	this.another = another;

liviutudor / JacksonBean.java

Created September 16, 2017 00:29

Usage of Jackson annotations when removing setters and zero-args constructor

	import com.fasterxml.jackson.annotation.JsonCreator;
	import com.fasterxml.jackson.annotation.JsonProperty;

	public class JacksonBean {
	private final int value;
	private final String another;

	@JsonCreator
	public JacksonBean(@JsonProperty("value") int value, @JsonProperty("another") String another) {
	this.value = value;

liviutudor / Sample.java

Created June 28, 2017 07:19

Writing the same code using RxJava Observable

	@GET
	public Observable<Response> processRequest( @QueryParam("id")String id, @QueryParam("userId")String userId ) {
	return Observable.zip(
	Observable.fromCallable(() -> database.retrieveRecord(id)),
	Observable.fromCallable(() -> userStore.retrieve(userId)),
	Observable.fromCallable(() -> logger.writeEntryFor(id, userId)),
	this::generateAdResponse
	);
	}