I have a Maven project that derives the path to a native library using properties which can be set in local profiles. For example:
<project>
...
<build>
...
<plugins>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<environmentVariables>
<LD_LIBRARY_PATH>${foo.libdir}</LD_LIBRARY_PATH>
</environmentVariables>
<fork>always</fork>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>foo-default</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<foo.libdir>/usr/local/lib</foo.libdir>
</properties>
</profile>
</profiles>
</project>
When I'm working with this project in Eclipse using the M2Eclipse plugin, I'd like to be able to set up run configurations that also reference this path in the same was (e.g., so I can run the Eclipse debugger on the project). Is there a way to access the Maven property from Eclipse, e.g., so that could set LD_LIBRARY_PATH in the run configuration using a variable like ${maven_property:foo.libdir}?
I do not think so.
Your maven script could refer to environment variable that you could define in the environment tab of your launch configuration
But the other way around (i.e. your configuration resolving at launch time some maven script property) is not, as far as I know, possible.
Related
I am trying to build a Scala-Maven project on IntelliJ IDEA. Right after creating the project, it says build successful. This is how my pom.xml looks like:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.dbloads.pgms</groupId>
<artifactId>Arts</artifactId>
<version>1.0-SNAPSHOT</version>
<inceptionYear>2008</inceptionYear>
<properties>
<scala.version>2.7.0</scala.version>
</properties>
<dependencies>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>${scala.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.specs</groupId>
<artifactId>specs</artifactId>
<version>1.2.5</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/scala</sourceDirectory>
<testSourceDirectory>src/test/scala</testSourceDirectory>
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.4.0</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
<args>
<arg>-target:jvm-1.5</arg>
</args>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<configuration>
<downloadSources>true</downloadSources>
<buildcommands>
<buildcommand>ch.epfl.lamp.sdt.core.scalabuilder</buildcommand>
</buildcommands>
<additionalProjectnatures>
<projectnature>ch.epfl.lamp.sdt.core.scalanature</projectnature>
</additionalProjectnatures>
<classpathContainers>
<classpathContainer>org.eclipse.jdt.launching.JRE_CONTAINER</classpathContainer>
<classpathContainer>ch.epfl.lamp.sdt.launching.SCALA_CONTAINER</classpathContainer>
</classpathContainers>
</configuration>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.4.0</version>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
</configuration>
</plugin>
</plugins>
</reporting>
</project>
Next I tried to add the compiler options in project like below:
Once added and when I click the RUN button, I get the below error message:
[ERROR] Plugin net.alchim31.maven:scala-maven-plugin:3.4.0 or one of its dependencies could not be resolved: Failed to read artifact descriptor for net.alchim31.maven:scala-maven-plugin:jar:3.4.0: Could not transfer artifact net.alchim31.maven:scala-maven-plugin:pom:3.4.0 from/to central (https://repo.maven.apache.org/maven2): PITC-Zscaler-EMEA-Amsterdam3PR.proxy.corporate.ge.com: Unknown host PITC-Zscaler-EMEA-Amsterdam3PR.proxy.corporate.ge.com -> [Help 1]
I am using the jdk version: 1.8.0_172 and I have added the Scala plugin directly from the plugins. Hence it is the latest version of the Scala.
Could anyone let me know how can I fix this problem.
It looks like you need to configure Maven and IntelliJ to use network proxy settings, since it looks like you might be behind a corporate firewall.
Maven has the ability to configure a proxy through its settings (in ~/.m2/settings.xml on Unix-like systems, or %HOME%\.m2\settings.xml on Windows), as follows:
<settings ...>
.
.
<proxies>
<!-- You can have one of these for each possible proxy. -->
<proxy>
<active>true</active>
<!-- Pick some ID for your proxy here. -->
<id>corp-proxy</id>
<!-- Choose your protocol here. E.g. "http", "socks4" or "socks5" -->
<protocol>http</protocol>
<!-- Specify the proxy server name (or IP address) and port of your proxy here. -->
<host>proxy.example.com</host>
<port>8080</port>
<!-- Identify any hosts here that you can access directly. It's unlikely that you'll
need this unless you have a proxy repository (such as Nexus, Artifactory, etc.) on
your corporate network. -->
<nonProxyHosts>www.google.com|*.example.com</nonProxyHosts>
<!-- The following fields are only necessary if required by your proxy. If you need to
enter your own username and password, make sure you do not add this file to version
control! -->
<username>proxyuser</username>
<password>somepassword</password>
</proxy>
</proxies>
.
.
</settings>
Meanwhile, IntelliJ is configured to use proxies through its settings. Refer to this answer for further details. (Note that setting proxy information via the JAVA_OPTS environment variable will work for running any Java/Scala/JVM application that needs to access the Internet via a proxy.)
Alternatively, if your proxy settings are configured correctly or are not required, it might be a temporary network connection issue, so make sure you have an Internet connection and try again. (The exception is a failure by Maven to download the plugin from the Maven central repository.)
BTW, the version of Scala you have specified—2.7.0—is ancient and almost certainly will not work with JDK 8. Either use an older JDK or a more recent version of Scala (the current release is 2.12.6).
Note that if you need to work with the current version of Apache Spark, you must currently use Scala 2.11.x - the most recent release being 2.11.12.
UPDATE:
From your comments, it seems there is some confusion about the roles played by Maven, the scala-maven-plugin, IntelliJ and the IntelliJ Scala plugin, so I'll quickly summarize them here. Please bear with me if I cover topics you're already familiar with...
Maven is a system for building and publishing software. (It actually does a lot more than just that, which is why Maven describes itself as project management software.) It allows developers to specify, in a single place, all of their software's dependencies (third-party libraries used by the software), which Maven downloads as required from the Central Maven Repository—mostly open-source—or from other, private repositories, as required. Further settings control how compilers are configured, tests are run, reports generated, etc.
Maven was developed primarily for development of Java-language projects. The scala-maven-plugin provides support for the Scala language and compiler within Maven. It is this plugin that downloads the version of the Scala compiler specified by your project and uses it to compile and build your sources.
If you look at your Maven project's pom.xml file, you will notice the following lines in the build section:
<project ...>
...
<build>
...
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.4.0</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
<args>
<arg>-target:jvm-1.5</arg>
</args>
</configuration>
</plugin>
...
</build>
...
</project>
and again in the reporting section:
<project ...>
...
<reporting>
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.4.0</version>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
</configuration>
</plugin>
</plugins>
</reporting>
</project>
In both cases, there is a line that reads <scalaVersion>${scala.version}</scalaVersion>, which tells Maven which version of Scala you want to use. The plugin then uses this version of the Scala compiler, and has Maven download it to a cached, local repository on your machine (typically, in C:\Users\{your account}\.m2 on a Windows machine). Note that both Maven and the scala-maven-plugin will ignore any versions of Scala you have installed on your machine.
So which version of Scala is the plugin going to download for you? The value ${scala.version} states that the version number is stored as the value of a property named scala.version. Your pom.xml file also has lines, near the top, that create this property:
<project ...>
...
<properties>
<scala.version>2.7.0</scala.version>
</properties>
...
</project>
So, you can see that you will use version 2.7.0 of the Scala compiler. If you want to use the latest Scala version, you should change this to:
<project ...>
...
<properties>
<scala.version>2.12.6</scala.version>
</properties>
...
</project>
OK, so now you will be using the latest version of the Scala compiler. Now let's move on to IntelliJ...
IntelliJ IDEA is an Integrated Development Environment (IDE), primarily aimed at development with the Java language. It provides syntax highlighting, smart code completion, and other features to simplify the process of writing code. In order to provide those features for the Scala programming language, you need to install its Scala plugin.
You can configure IntelliJ to use any version of Scala that you have installed on your machine. IntelliJ will then know how to compile, build and run your software and can work without using your Maven project object model (POM) file's build definition.
However, one of the reasons for using Maven is to ensure a consistent build environment for developing a project, so that it is not at the whim of whatever each developer may or may not have installed on their machine. For this reason, if a project uses Maven, it's a good idea to tell IntelliJ. That way, IntelliJ can use Maven's pom.xml file to specify the version of the compiler, download dependencies, configure the compiler settings, etc.
So, the above information should help you to get up-and-running with your project, working with your corporation's network proxy and using the latest version of Scala, using Maven and IntelliJ.
When compiling a Maven project I get this error during validation phase of the pom.xml. It is quite a large project with complex build process. The project contains only JavaScript code and does not have to be compiled into war. I'm looking for a way to either:
Just disable the error through disabling failOnMissingWebXml (it appears to be a non-critical Eclipse error)
Find a solution that prevents this validation error in Eclipse (answers to related
questions didn't work for my specific scenario)
The full error:
Description Resource Path Location Type web.xml is missing
and <failOnMissingWebXml> is set to true pom.xml /testproject line 6
Maven Java EE Configuration Problem
After clicking on the error the problem seems to be on this line of pom.xml:
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.scs</groupId>
<artifactId>scs-control-panel</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging> **THE ERROR POINTS TO THIS LINE**
<parent>
<groupId>com.scs</groupId>
<artifactId>scs</artifactId>
<version>1.0-SNAPSHOT</version>
<relativePath>../scs</relativePath>
</parent>
<build>
</build>
<dependencies>
</dependencies>
</project>
Not sure if this is an Eclipse or Maven error, but probably Eclipse, since Maven runs smoothly through command line. It may also be a bug in Eclipse, I'm running Eclipse Java EE IDE for Web Developers Version: Mars.1 Release (4.5.1).
UPDATE1: I tried updating the project in Eclipse but no difference.
UPDATE2: I tried changing the package type from war to pom but no difference.
Everything in Maven revolves around plugins. Plugins are the programs that execute some behavior within the build process. Some plugin inclusions are implied without us having to declare anything.
These implied plugins have default configurations. For example, the maven-compiler-plugin is included in all projects without having to declare it. To override the default configurations we need to declare the plugin in our pom.xml file and set the configurations. For instance, you will see a lot of projects override the default version on the maven-compiler-plugin which has it's source and target set to Java 1.5. We can change to 1.8
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
This is just some theory behind the plugins to give you an idea of what's going on.
With that being said, in order to use <packaging>war<packaging>, the maven-war-plugin is used without us having to declare anything. Just like when using <packaging>jar</packaging>, the maven-jar-plugin's inclusion is implied.
The default configuration for the maven-war-plugin is to fail where there is no web.xml (that configuration property being failOnMissingWebXml). So if we want to override this default, we need to declare the plugin, then set the value for the property to false (not fail)
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
UPDATE
The war plugin now allows you to just use a property that it will lookup. This allows you to simply declare the property without having to override the plugin. To add this property, you would simply add the property failOnMissingWebXml with a value of false to the project <properties>
<properties>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
Just by adding this, if you have no further configurations you need to add to the compiler plugin, you will no longer have to override and declare the compiler plugin in your pom.
UPDATE 2
So if you declare the maven-war-plugin and use a <version> 3.0.0+, the default for no web.xml failure will be set to false, so we no longer have to override the configuration property, though we still need to declare the plugin.
Do:
mvn clean eclipse:clean
Add this to your POM:
<packaging>war</packaging>
<properties>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
I guess the easiest path is to choose the war plugin version 3. The default value for failOnMissingWebXml has been changed from true to false.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.0.0</version>
</plugin>
Once set in your pom the nasty error vanishes for ever.
Add the below property to POM.xml
<failOnMissingWebXml>false</failOnMissingWebXml>
I was able to resolve this problem by adding this property in POM.xml as like below.
<properties>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
I have an application with two versions: swt and rap. Therefore in my plugins I have optional dependencies on both of them and when there is missing one, the other is present and vice versa. Problem is, that in Tycho I can only require or ignore optional dependencies. Is there a way to treat this somehow?
My suggestion: not use optional dependencies. In my single sourced RCP/RAP project, i'm create several empty/"fake" plugins, only id matters with no source.
RAP build
org.eclipse.jface.databinding
org.eclipse.ui
org.eclipse.ui.forms
RCP build
org.eclipse.rap.jface.databinding
org.eclipse.rap.ui
org.eclipse.rap.ui.form
well I have found a solution to this. it is having two separate profiles for rcp and rap, ignore optional dependencies and define extra requirement for each bundle I need in that particular profile eg:
<profiles>
<profile>
<id>rap</id>
<activation>
<activeByDefault>false</activeByDefault>
<property>
<name>maven.profile</name>
<value>rap</value>
</property>
</activation>
<repositories>
...
</repositories>
<modules>
...
</modules>
<build>
<plugins>
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>target-platform-configuration</artifactId>
<version>${tycho-version}</version>
<configuration>
<dependency-resolution>
<optionalDependencies>ignore</optionalDependencies>
<extraRequirements>
<requirement>
<type>eclipse-plugin</type>
<id>org.eclipse.rap.ui</id>
<versionRange>0.0.0</versionRange>
</requirement>
<requirement>
<type>eclipse-plugin</type>
<id>org.eclipse.rap.ui.views</id>
<versionRange>0.0.0</versionRange>
</requirement>
</extraRequirements>
</dependency-resolution>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
this is what i have in top level pom.xml, if some bundle that is part of your build have optional dependecy on other bundle from that build there will be circular dependency if you add the extra requirement in the top level pom. solution is simply to add the extra requirement to pom of the bundle that has the dependency - you just have to put it inside a profile it is meant to be in
i have the following problem: I want to use maven profiles and the maven-war-plugin for filtering my webapplication, so that it's just one click to deploy it either on the live- or on the development server.
When i build the .WAR-archive via Eclipse (Maven-Plugin) and then manually deploy it on the tomcat-server via the tomcat-manager-interface, my application works as expected. (all variables are replaced correctly inside the generated .WAR-archive)
But when i want to run the application using Eclipse's "Run on Server", an exception occurs:
[..] nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.security.web.authentication.logout.LogoutFilter]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: ${security.casEntryPoint.logoutSuccessUrl} isn't a valid redirect URL
This is the configuration of the maven profiles in my pom.xml:
<profiles>
<profile>
<id>prod</id>
<build>
<filters>
<filter>src/main/filters/dfnaaiAgreement-prod.properties</filter>
</filters>
</build>
</profile>
<profile>
<id>devLocal</id>
<build>
<filters>
<filter>src/main/filters/dfnaaiAgreement-devLocal.properties</filter>
</filters>
</build>
</profile>
This is an example entry for the *.properties file:
security.casEntryPoint.logoutSuccessUrl = https://example_entry/please_logmeout
This is one entry in the settings.xml that should be replaced by the value in the *.properties file:
<security:logout logout-url="/logout" logout-success-url="${security.casEntryPoint.logoutSuccessUrl}" />
and this is the configuration for the maven plugin (in the pom.xml), that is used for filtering the configuration files:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
<configuration>
<warName>dfnaaiAgreement</warName>
<webResources>
<resource>
<directory>${basedir}/src/main/webapp</directory>
<filtering>true</filtering>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
</webResources>
</configuration>
This is my maven build configuration:
Maven-Build configuration (Sorry, not enough reputation to post images directly)
It seems like eclipse's "run on server" deploys the unfiltered application on the tomcat-server.
What am i doing wrong?
Update:
I followed this Link Run Maven webapp on server from Eclipse with properties injection from profile, but i'am still receiving the same Exception.
Here's the adjustment of my project's configuration: Active Maven Profiles
Update: Eclipse (Luna) deploys the webapplication to workspace/.metadata/.plugins/.org.eclipse.wst.server.core/tmp0/wtpwebapps/applicationName. The settings.xml that's deployed there still contains the unfiltered variables, whereas the generated .WAR-Archive (that is located at workspace/applicationName/target) has the correctly filtered settings.xml. How is this possible?
Thanks for your help!
Although it's not an optimal solution i found a workaround to fix my problem. Therefor i adjusted the project's deployment assembly settings in the way that the WEB-INF-Folder of the target-Folder will be taken for deployment.
You can do this by rightclicking your project and choose "Properties". Here's a screenshot of how i adjusted the settings:
Web_Deployment_Assembly.PNG
Since both use the target directory, Eclipse's build output sometimes interferes with the output of mvn builds run at the command line.
What's the best way to separate the two outputs?
Insert the following into your pom.xml. Eclipse's "m2e.version" property will activate the following profile which alters the location of the Eclipse build
<profiles>
<profile>
<id>IDE</id>
<activation>
<property>
<name>m2e.version</name>
</property>
</activation>
<build>
<!-- Put the IDE's build output in a folder other than target, so that IDE builds don't interact with Maven builds -->
<directory>target-ide</directory>
</build>
</profile>
</profiles>
Official way is presented here:
http://wiki.eclipse.org/M2E_FAQ#How_to_configure_Maven_project_to_use_separate_output_folders_in_Eclipse
I personally don't do something like this. Usually I basically disable auto-build in Eclipse since most builds I do from the console anyway. But if you really want it, here you are.
If you use maven-eclipse-plugin instead of M2Eclipse, here's the definition you want in order to change the Eclipse output directory:
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<buildOutputDirectory>target-eclipse/classes</buildOutputDirectory>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</configuration>
</plugin>