Alice@Development: eclipse

Showing posts with label eclipse. Show all posts

Sunday, April 22, 2018

Eclipse: frequently used keyboard shortcuts

File
Save	Ctrl+S
Save All	Shift+Ctrl+S
Refactor - Java
Extract Local Variable	Shift+Alt+L
Extract Method	Shift+Alt+M
Inline	Shift+Alt+I
Rename - Refactoring	Shift+Alt+R
Source
Format	Shift+Ctrl+F
Organize Imports	Shift+Ctrl+O
Toggle Comment	Shift+Ctrl+C
	Ctrl+/
	Ctrl+7
Toggle Mark Occurrences	Shift+Alt+O
Text Editing
Copy Lines	Ctrl+Alt+Down
Delete Line	Ctrl+D
Duplicate Lines	Ctrl+Alt+Up
Insert Line Above Current Line	Shift+Ctrl+Enter
Insert Line Below Current Line	Shift+Enter
Join Lines	Ctrl+Alt+J
Line End	End
Line Start	Home
Move Lines Down	Alt+Down
Move Lines Up	Alt+Up
Toggle Block Selection	Shift+Alt+A

Friday, May 6, 2016

Run a Maven Vaadin application on an embedded Jetty server in Eclipse

Source: Embedding Jetty

Add Maven Dependencies

<properties>
 <jetty.version>9.3.0.v20150612</jetty.version>
</properties>

<dependencies>
<dependency>
 <groupId>org.eclipse.jetty</groupId>
 <artifactId>jetty-servlet</artifactId>
 <version>${jetty.version}</version>
</dependency>
<dependency>
 <groupId>org.eclipse.jetty</groupId>
 <artifactId>jetty-continuation</artifactId>
 <version>${jetty.version}</version>
</dependency>
<dependency>
 <groupId>org.eclipse.jetty</groupId>
 <artifactId>jetty-server</artifactId>
 <version>${jetty.version}</version>
</dependency>
</dependencies>

Create a Server

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.util.resource.PathResource;

public class VaadinApplicationServer 
{
    public static void main( String[] args ) throws Exception
    {
        Server server = new Server(8080);
        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
        context.setContextPath("/");
        context.setBaseResource(new PathResource(new File("src/main/webapp")));
        context.addServlet(MyUIServlet.class, "/*");
        server.setHandler(context);
        server.start();
        server.join();
    }
}

Run as Java application

Now it is possible to run your Vaadin project as a Java application with the Jetty VaadinApplicationServer class.

Getting started with a Maven Vaadin project in Eclipse without the Eclipse Vaadin Plugin

Environment: Eclipse Luna for Java SE on Windows 10 with Apache Tomcat server and Maven

Install Eclipse software

Source: WTP FAQ: How do I install WTP?

either install Eclipse IDE for Java EE Developers, which has the needed dependencies by default,
or install the following software for the Eclipse IDE for Java Developers:

Eclipse Java EE Developer Tools
JST Server Adapters Extensions

The installation is done by the following procedure:

in Eclipse, navigate to Help -> Install New Software...
select Work with: --All Available Sites--
expand Web, XML, Java EE and OSGi Enterprise Development category menu
select the following:

Eclipse Java EE Developer Tools
(Eclipse Java Web Developer Tools)*
JST Server Adapters Extensions
(JST Server Adapters)*
(JST Server UI)*

click Next, click Next again, accept Licence agreement, click Finish to install.

As a result, you are able to add a Server runtime.

Try it: follow the tutorial in the Eclipse Help: Adding the Apache Tomcat runtimes

As a result, you now have the Java EE perspective for Eclipse.

As a result, the Run on Server option becomes available for projects.

*(might be needed to fix errors)

Add Maven Archetypes for Vaadin

Source: Set up a Vaadin project with Maven2

in Eclipse, navigate to Window -> Preferences
expand Maven menu item, select Archetypes
click Add Remote Catalog...

Catalog File: https://repo1.maven.org/maven2/archetype-catalog.xml
Description: Maven2

click OK.

As a result, when creating a new Maven project, the Vaadin archetypes became available.

Try it:

in Eclipse, go to File -> New -> Other... -> Maven -> Maven Project
leave the Create Simple Project checkbox unselected, click Next
Filter for Vaadin, select the com.vaadin archetype you would like to create, click Next
proceed with project creation.

Here is a description of the Archetypes: https://vaadin.com/maven#archetypes

Set up Facets for your project

In order for Eclipse to recognize your Vaadin project as a Web Project that can be deployed to a server, you need to do the following:

in Eclipse, navigate to your vaadin project's Properties (right click on project name in Project Explorer, select Properties)
select Project Facets
click Convert to faceted form...
leave the Java option selected
select the option Dynamic Web Module, set version to 3.1

click Further configuration availiable...

set Content directory to src/main/webapp (the default maven webcontent directory)
select Generate web.xml deployment descriptor and click OK.

As a result, you can deploy your project to the server.

Try it: follow the tutorial in Eclipse Help: Deployment: Deploy the Dynamic Web Project to the Server

Set up Project Deployment Assemblies

Add Maven repositories

In order for a the Maven dependencies to be deployed on the Server, you need to do the following:

in Eclipse, navigate to your vaadin project's Properties (right click on project name in Project Explorer, select Properties)
select Deployment Assembly
click Add...

select Java Build Path Entries, click Next
select Maven Dependencies, click Finish

click OK.

As a result, now your Vaadin web application should run on the server.

Ensure the rest is good

Source --> Deploy Path
/src/main/java --> WEB-INF/classes
/src/main/resources --> WEB-INF/classes
/src/main/webapp --> /

Build Vaadin plugin goals with Maven

In order for a Vaadin application to run, you first need to build the components.

The Plugin Goals can be found in the pom.xml: update-theme, update-widgetset, compile, compile-theme.

in Eclipse, go to Run-> Run Configurations...
right click on Maven Build select New

Name your configuration
Base directory is the project's directory
Goals have to be separated by space. Copy-paste in the following:

com.vaadin:vaadin-maven-plugin:update-theme com.vaadin:vaadin-maven-plugin:update-widgetset com.vaadin:vaadin-maven-plugin:compile com.vaadin:vaadin-maven-plugin:compile-theme

click Apply.
click Run to run the build.

Monday, April 25, 2016

Setting up H2 database connection in Eclipse Luna in a Maven project

Sources:

Download the H2 Database Engine

Open the pom.xml of your project >
add H2 database engine as a dependency.

For this tutorial version 1.4.191 was used.
Maven repository: http://mvnrepository.com/artifact/com.h2database/h2
To download it, right-click on the Project Name in Eclipse Project Explorer > Maven > Download Sources

Download Eclipse DTP (Data Tools Platform)

In Eclipse, go to Help > Eclipse Marketplace... >
search Data Tools Platform >
click Install >
select both Extender SDK and Enablement Extender SDK >
accept licence agreement >
wait patiently until a popup informs you that the installation was successful and Eclipse needs to be restarted.

Open the "Database Development" perspective

This perspective was installed with the DTP.

In Eclipse, go to Window > Open Perspective > Other... > Database Development

Add Database Connection

In the Database Development perspective, in the Data Source Explorere, right-click on Database Connections > New... >
select Generic JDBC and enter a Name for the connection then click Next >
select H2 Driver from the list of drivers.
if the list is empty, click New Driver Definition button >

on the Name/Type tab, click Generic JDBC Driver and give it a unique Driver Name.
on the JAR list tab, click Add JAR/Zip... > select H2 JAR file from Maven repository > click Open.
on the Properties tab, enter a Database Name for the database, and the following:

Connection URL - jdbc:h2:~/test
Driver Class - org.h2.Driver
User ID - sa

click OK.

click Test Connection to see that the connection works.
click Finish.

Now you can connect to the database by right-click on the name > Connect.
Once you connected you can edit the tables by right-click on the table name > Data > Edit

Connect to the Database

To connect to a database, a Java application first needs to load the database driver, and then get a connection. A simple way to do that is using the following code:

import java.sql.*;
public class Test {
    public static void main(String[] a)
            throws Exception {
        Class.forName("org.h2.Driver");
        Connection conn = DriverManager.
            getConnection("jdbc:h2:~/test", "sa", "");
        // add application code here
        conn.close();
    }
}

Create a new Database

By default, H2 creates a new database on the first connection, if the one with the specified name does not exist.
After the jdbc:h2: prefix a path to the database can be given. The ~/test creates a new test database in the user's home directory.