Otávio Garcia garcia-jj

A senior software architect, private aircraft pilot and a coffee lover.

garcia-jj / GMailSender.java

Last active February 27, 2018 16:36

Sending email via GMail with Java SE environment

	package br.com.otavio.mail.helper;

	import java.util.Properties;

	import javax.mail.Authenticator;
	import javax.mail.Message;
	import javax.mail.PasswordAuthentication;
	import javax.mail.Session;
	import javax.mail.Transport;
	import javax.mail.internet.InternetAddress;

garcia-jj / Reflecting.java

Last active August 29, 2015 14:05

Running Reflection vs Mirror vs Method Handler under a Intel x64 octa-core machine to get performance metrics

	package ot;

	import static java.lang.invoke.MethodHandles.publicLookup;
	import static java.lang.invoke.MethodType.methodType;

	import java.lang.invoke.MethodHandle;
	import java.lang.reflect.Method;
	import java.util.concurrent.TimeUnit;

	import net.vidageek.mirror.dsl.Mirror;

garcia-jj / AbstractRepositoryTest.java

Last active August 29, 2015 14:04

Testes unitários de repositórios

	import javax.persistence.EntityManager;
	import javax.persistence.EntityManagerFactory;
	import javax.persistence.Persistence;

	import org.junit.AfterClass;
	import org.junit.BeforeClass;

	public abstract class AbstractRepositoryTest {

	protected static EntityManagerFactory emFactory;

garcia-jj / PersistentLocalDate.java

Last active August 29, 2015 14:00

JPA with java.time

	/*
	* Copyright 2014 Otávio S Garcia
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

garcia-jj / PasswordBasedEncryption.java

Last active August 29, 2015 13:58

Strong encryption with PBE

	package foo;

	import static java.lang.System.arraycopy;
	import static java.util.Arrays.copyOf;
	import static java.util.Arrays.copyOfRange;
	import static java.util.Arrays.fill;

	import java.security.GeneralSecurityException;
	import java.security.NoSuchAlgorithmException;
	import java.security.SecureRandom;

garcia-jj / bootprime.xhtml

Created March 15, 2014 03:28

Drawing bootstrap with primefaces

	<!DOCTYPE html>
	<html xmlns="http://www.w3.org/1999/xhtml"
	xmlns:h="http://xmlns.jcp.org/jsf/html"
	xmlns:jsf="http://xmlns.jcp.org/jsf"
	xmlns:f="http://xmlns.jcp.org/jsf/core"
	xmlns:p="http://primefaces.org/ui">
	<h:head>
	<title>User Page</title>
	<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet"></link>
	</h:head>

garcia-jj / Resources.java

Last active August 29, 2015 13:56

How to produce Java EE resources

	import javax.annotation.Resource;
	import javax.ejb.SessionContext;
	import javax.enterprise.context.Dependent;
	import javax.enterprise.inject.Produces;
	import javax.persistence.EntityManager;
	import javax.persistence.PersistenceContext;

	/**
	* Responsible to produces some Java EE resources to make available into CDI beans.
	*

garcia-jj / Page.java

Last active January 3, 2016 12:49

Pagination is really cool to avoid fuking the server performance :)

	import static com.google.common.base.Objects.firstNonNull;

	import java.io.Serializable;

	/**
	* Classe para prover paginação de resultados.
	*
	* @author Otávio Scherer Garcia
	*/
	public final class Page

garcia-jj / PrincipalHelper.java

Last active December 31, 2015 11:39

How to static ask for "who I am".

	import javax.security.auth.Subject;

	public class PrincipalHelper {

	public static Principal main() {
	Subject subject = (Subject) PolicyContext.getContext("javax.security.auth.Subject.container");
	return (Principal) subject.getPublicCredentials().stream().findFirst().orElse(null);
	}
	}

garcia-jj / InvokerReflectionTest.java

Last active December 24, 2015 06:39

Testes de performance entre Reflection e Invoker do Java 7

	package br.com.caelum.vraptor.benchmark;

	import java.lang.invoke.MethodHandle;
	import java.lang.reflect.Method;
	import java.util.concurrent.TimeUnit;

	import org.openjdk.jmh.annotations.BenchmarkMode;
	import org.openjdk.jmh.annotations.GenerateMicroBenchmark;
	import org.openjdk.jmh.annotations.Measurement;
	import org.openjdk.jmh.annotations.Mode;