Eclipse

Sometimes I need to resolve Maven dependencies programmatically. Eclipse Aether is a library for working with artifact repositories and I’ll be using it in the following example to read dependency trees from a given POM descriptor file and download each dependency from a remote Maven repository to a local directory. Figure 1. Using Eclipse Aether. Dependencies We’re adding a bunch of dependencies to our project’s pom.xml: <properties> <aetherVersion>1.1.0</aetherVersion> <mavenVersion>3.2.1</mavenVersion> </properties> ...

The MQ Telemetry Transport Protocol (MQTT) is a lightweight publish/subscribe messaging protocol developed in 1999 that experiences a growing popularity due to trends like the Internet-of-Things and the need to exchange information between low powered devices with aspects as CPU and bandwidth usage in mind. In the following tutorial I’d like to demonstrate how to set-up a broker for this protocol with the help of the Moquette library and how to create a client and publish messages for a specific topic using this broker and Eclipse Paho as client library. ...

The MemoryAnalyzer Plugin for Eclipse allows us to quickly analyze heap dumps from a virtual machine and search for memory leaks. In the following tutorial we’re going to create and run a small application that is going to cause an OutOfMemoryException during its runtime. In addition, we’re forcing the virtual machine to save a heap dump and finally analyzing this data using Eclipse and the MemoryAnalyzer plugin. Prerequisites Java Development Kit 6 Eclipse Indigo ...

Using the contract-first approach to define a web service offers some advantages in contrast to the code-first approach. In the following tutorial we’re going to take a look at some details of this approach and we’re going to implement a real SOAP service using JAX-WS, Maven and the Eclipse IDE. Finally we’re going to run our service implementation on an embedded Jetty instance and we’re going to take a look at soapUI and how to test our service using this neat tool. ...

I am currently working on a plugin that needs to receive some information from an LDAP/Active Directory using JNDI. That’s why I needed to set up a directory server in a short time and I didn’t want to waste much effort for here. Luckily for me the Apache Directory Studio saved my day and allowed me to set up everything I needed in a few minutes. Short and sweet: In this tutorial I’m going to show you how to configure everything you need in your Eclipse IDE and finally how to query the created LDAP server with a tiny java client using JNDI. ...

In this short tutorial we are going to build a Java Server Faces Web-Application using JSF2.0, Facelets, Maven and Hibernate as ORM Mapper. The goals for this first step are: Setting up the project structure using Maven, defining a frame template/decorator and a registration facelet, creating a managed bean and mapping it’s values to the facelet, adding some basic validation, displaying validation errors and finally adding a navigation structure. In step2 of this tutorial we are going to add persistence using Hibernate, add some security, create a custom UI component and add some AJAX. ...

With the Maven Android Plugin it is possible to build and deploy/undeploy your android app and start/stop the emulator – if you’re used to maven you won’t be going without it ;) If you’re interested in signing your apk using maven – take a look at this article Project Setup Create an android project using the android tool We need some dependencies – so create a pom.xml in the project’s root directory – I took this from the plugin samples and modified it: <?xml version="1.0" encoding="UTF-8"?> <!-- Copyright (C) 2009 Jayway AB 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 distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.hascode.android.app</groupId> <artifactId>demo</artifactId> <packaging>apk</packaging> <name>hasCode.com - Sample Android App using the Maven Android Plugin</name> <version>0.1</version> <dependencies> <dependency> <groupId>android</groupId> <artifactId>android</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.8.1</version> <scope>test</scope> </dependency> </dependencies> <build> <!--<finalName>${artifactId}</finalName>--> <plugins> <plugin> <groupId>com.jayway.maven.plugins.android.generation2</groupId> <artifactId>maven-android-plugin</artifactId> <configuration> <sdk> <path>${env.ANDROID_HOME}</path> <platform>3</platform> </sdk> <deleteConflictingFiles>true</deleteConflictingFiles> </configuration> <extensions>true</extensions> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.5</source> <target>1.5</target> </configuration> </plugin> </plugins> </build> </project> ...

Favorites Spare my time when using static imports .. Window > Preferences > Java > Editor > Content Assist > Favorites: com.google.common.collect.Lists com.jayway.restassured.matcher.RestAssuredMatchers com.jayway.restassured.RestAssured io.restassured.matcher.RestAssuredMatchers io.restassured.RestAssured org.hamcrest.MatcherAssert org.hamcrest.Matchers org.mockito.Mockito javaslang.API javaslang.Predicates Template to insert a static logger instance Go Windows > Preferences > Java > Editor > Templates > New … Enter logger as name and as template: ${:import(org.slf4j.Logger,org.slf4j.LoggerFactory)} private static final Logger LOG = LoggerFactory.getLogger(${enclosing_type}.class); Afterwards you’re able to type logger in your code and ctrl+space gives the option to insert the logger ...

Remote Debug a Pod’s Java Process Simple steps for remote debugging a Java process running on a k8 pod: Edit deployment and add the following parameters to the Java start line: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=127.0.0.1:5005 Also add the following port mapping at the section container → ports in the deployment: - containerPort: 5005 protocol: TCP Safe, wait for the new pods and then add a port forward for port 5005 for this pod: kubectl port-forward podname 5005 ...

SBT – Eclipse Plugin Add to your ~/.sbt/plugins/plugins.sbt addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.1.1")