spring2-jndi-datasource-conexion

I share example, Spring Boot2 jndi datasource conexion from Tomcat.

Technologies used:

1. Spring Boot 2.0.3.RELEASE
2. Maven 4
3. Java 9
4. Eclipse: Oxygen.1.a Release (4.7.1a)
5. Tomcat 9
6. MySql 5.7.24

Code on GitHub:

https://github.com/HenryXiloj/Spring-boot2-jndi-datasource-conexion



Steps:

1. Create table and insert on table.

CREATE TABLE `user` (
  `id` bigint(20) NOT NULL,
  `name` varchar(45) DEFAULT NULL,
  `email` varchar(45) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

INSERT INTO `user` (`id`, `name`, `email`) VALUES ('1', 'Henry', 'test@gmail.com');
INSERT INTO `user` (`id`, `name`, `email`) VALUES ('2', 'Lucas', 'test2@gmail.com');

2.  Add in your context.xml (path_your_tomcat9/conf/context.xml).




3. Import maven project from eclipse.

4. edit configuration file application.properties

5. Run  As -> Run on Server

6. Test: http://localhost:8080/spring2-datasource-conexion/user

References:

https://www.baeldung.com/spring-persistence-jpa-jndi-datasource

Spring-boot2-pool-conexion

I share example, Spring Boot2 pool conexion from Tomcat.

Technologies used:

1. Spring Boot 2.0.3.RELEASE
2. Maven 4
3. Java 9
4. Eclipse: Oxygen.1.a Release (4.7.1a)
5. Tomcat 9
6. MySql 5.7.24

Steps:

1. Create table and insert on table.

CREATE TABLE `user` (
  `id` bigint(20) NOT NULL,
  `name` varchar(45) DEFAULT NULL,
  `email` varchar(45) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

INSERT INTO `user` (`id`, `name`, `email`) VALUES ('1', 'Henry', 'test@gmail.com');
INSERT INTO `user` (`id`, `name`, `email`) VALUES ('2', 'Juan', 'test2@gmail.com');


2. Import maven project from eclipse.
3. edit configuration file .yml

4. Run  As -> Run on Server

5. For test: http://localhost:8080/spring2-pool-conexion/user

Code on GitHub:
https://github.com/HenryXiloj/Spring-boot2-pool-conexion

References:

https://www.concretepage.com/spring-boot/spring-boot-tomcat-connection-pool

ERROR 1698 (28000): Access denied for user 'root'@'localhost'

I share solution the next error: ERROR 1698 (28000): Access denied for user 'root'@'localhost'

1. When you create new install mysql use 'sudo' on ubuntu.

2. First connect you db from command line.


sudo mysql -u root

3.



SELECT User, Host, plugin from mysql.user;

if you check User 'root' have 'auth_sockect' update to 'mysql_native_password'

4. in your case User='root'

  

5. FLUSH PRIVILEGES;
6. exit;

Try again.


References:

https://stackoverflow.com/questions/39281594/error-1698-28000-access-denied-for-user-rootlocalhost

Example consuming Gmail API

I share basic example, how to integrate Gmail API with Gradle

Technologies used:

1. Spring Tools Suite
4. Gradle 3.4.1
5. Java 8
8. Eclipse: Oxygen.1.a Release (4.7.1a)

Code on GitHub: https://github.com/HenryXiloj/api-gmail

Steps:

1:

Create credentials:



- if you have account on devolepers google, just on click dialgog ENABLE THE GMAIL API and create new proyect or choose exist proyect. from there page I get code for this example, below left the link on references.

- Dowload the configuration file and check the name file is credentials.json

2:

-create folder

mkdir your_proyect

cd your_proyect

-- run next command

gradle init --type basic

mkdir -p src/main/java src/main/resource

--Copy the credentials.json into src/main/resource

3: run your proyect with next command.

gradle -q run

Check de images when you run the project:




Result get my labels from my gmail.




References:

https://developers.google.com/gmail/api/quickstart/java

Manually Install Java on Ubuntu 18.04.1

How to manually install Java on Ubuntu:

Check next steps:

Step 1:

Download JDK from Oracle page, Link

https://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase9-3934878.html

Step 2:

For example I'm install JDK 9, but others version is similar.

Choose  file --> .tar.gz

 


Step 3:

Extract file on next path.

/usr/lib/jvm

Step 4:

Run next comands:

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/YOUR_JDK/bin/java 0

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/YOUR_JDK/bin/javac 0

sudo update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/YOUR_JDK/bin/javaws 0

Step 5: Configuration, Choose your version java, javac and javaws.

sudo update-alternatives --config java

sudo update-alternatives --config javac

sudo update-alternatives --config javaws

Check the image, below: