I'm using Maven with Eclipse - my POM contains the dependencies:
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>3.2.3</version>
</dependency>
In my build path I see a red "x" on maven-plugin-api-2.0.6.jar. I also see other jars that are using version 2.0.6 (maven-core, maven-project, maven-etc.) which seem to compile fine - I know importing the correct jar version would solve the problem, but why is eclipse trying to use an older version of maven on my project?
First a maven-plugin should never be used as a dependency. It should be configured as a plugin and NOT as a dependency see the following:
<project>
...
<build>
<!-- To define the plugin version in your parent POM -->
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
</plugin>
...
</plugins>
</pluginManagement>
<!-- To use the plugin goals in your POM or parent POM -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
</plugin>
...
</plugins>
</build>
...
</project>
Related
I'm trying to implement AspectJ annotations in JAVA maven project without spring. I have added Aspects and create annotation. But its not invoking the Aspects where i have added as Annotation to the method..Below is my code..Also the project link - https://github.com/chandru-kumar/aop-example
I have added aspectj maven plugin as well..But its not getting invoked..Can you pls help..? Not sure what I'm missing.
I haven't found any example without Spring project..
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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.aop.example</groupId>
<artifactId>aop-example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjrt -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>1.9.6</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.9.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.11</version>
<configuration>
<complianceLevel>1.8</complianceLevel>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.0</version>
</plugin>
<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>
<useIncrementalCompilation>false</useIncrementalCompilation>
</configuration>
</plugin>
<!-- <plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<complianceLevel>1.8</complianceLevel>
<source>1.8</source>
<target>1.8</target>
</configuration>
</execution>
</executions>
</plugin> -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<archive>
<manifest>
<mainClass>
com.aop.example.Test
</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
JAVA - Aspects - Advice
package com.aop.advices;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
public class SysoutAdvice {
#Around("#annotation(com.annotations.Sysout)")
public Object print(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
System.out.println("Start....");
Object object = proceedingJoinPoint.proceed();
System.out.println("End....");
return object;
}
}
JAVA - Annotation
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
#retention(RUNTIME)
#target(METHOD)
public #interface Sysout{}
I can tell that you are an AspectJ beginner. You made many mistakes. But do not worry, you are going to learn and get more experience over time.
Annotation must have RUNTIME scope
Otherwise the compiled code will not have an annotation to intercept, only the source code, which does not help.
Aspect must have #Aspect annotation
Otherwise the AspectJ compiler will not identify the class as an aspect.
Avoid double log output
If you do not add && execution(* *(..)), the aspect will intercept both call and execution joinpoints. The effect would be double log messages, because the aspect advice is triggered twice.
Add missing Maven plugin execution
Otherwise the AspectJ Maven plugin does not compile anything, because you did not tell it what to do.
Delete redundant AspectJ dependencies
Otherwise the Assembly plugin will pack them into the executable JAR, blowing it up to size 13.4 MB. But actually, you only need the AspectJ runtime aspectjrt in order to run an application when using compile-time weaving. The other two are for load-time weaving (aspectjweaver) and for the AspectJ compiler (aspetjtools), both of which you do not need during runtime.
If you follow my advice to remove those two, the JAR size shrinks dramatically to 0.12 MB. That is more than a factor 100 smaller.
Make sure the old AspectJ Maven plugin uses an up-to-date AspectJ compiler
The version number should be the same as the one used for aspectjrt. So you do not need aspetjtools as a runtime dependency, but as a plugin dependency, if you want to make sure you have identical versions.
This step is optional, but AspectJ Maven 1.11 uses AspectJ Tools 1.8.13 by default. This is fine if you just compile Java 8 code, because AspectJ Maven 1.11 does not support more than Java 8.
If you want a more modern plugin supporting AspectJ 1.9.7.M3 and Java 16, please look at the dev.aspectj plugin version (please note the other Maven group ID!).
There are other suboptimal things that should be changed in your Maven configuration, but this is the most important stuff, which makes your project run and your executable JAR small.
Update: Here is my pull request which fixes the problems above and a few more (see commit comments).
Consider writing this in your 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.aop</groupId>
<artifactId>AOPconcept</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>AOPconcept</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>6.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context
-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>6.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.9.1</version>
<scope>runtime</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>6.0.1</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.9.9.1</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<resources>
<resource>
<directory>src</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.3</version>
<configuration>
<complianceLevel>1.5</complianceLevel>
</configuration>
<executions>
</executions>
</plugin>
</plugins>
</build>
</project>
I want to provide external dependency to my maven project in eclipse. Therefore, I ave copied the jar file and its POM.xml directly in the local Maven Repository. But somehow Eclipse is complaining that the POM for the jar is invalid.
My pom.xml for jar file in local Repository looks like below:
<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>
<parent>
<groupId>com.b.t</groupId>
<artifactId>v-parent</artifactId>
<version>3.9.0</version>
</parent>
<scm>
<developerConnection>scm:svn:url/</developerConnection>
</scm>
<artifactId>v-p</artifactId>
<version>1.1.0</version>
<name>p</name>
<build>
<plugins>
<!-- Plugin required to build java classes from XSD using XJC -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>xjc</id>
<goals>
<goal>xjc</goal>
</goals>
</execution>
</executions>
<configuration>
<arguments>-npa</arguments>
<schemaDirectory>${project.basedir}/src/main/resources</schemaDirectory>
<packageName>com.b.t.v.fusion.p.generated</packageName>
<schemaFiles>pConfig.xsd</schemaFiles>
<outputDirectory>${basedir}/target/generated-sources</outputDirectory>
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!-- Plugin required to add the generated sources to the classpath -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${basedir}/target/generated-sources</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<dependency>
<groupId>com.b.t</groupId>
<artifactId>v-fusioninterface</artifactId>
</dependency>
<dependency>
<!-- FFT -->
<groupId>com.github.wendykierp</groupId>
<artifactId>JTransforms</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<!-- Reading and writing of MATLAB files -->
<groupId>net.sourceforge.jmatio</groupId>
<artifactId>jmatio</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<profiles>
<profile>
<id>doclint-java8-disable</id>
<activation>
<jdk>[1.8,)</jdk>
</activation>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<configuration>
<additionalparam>-Xdoclint:none</additionalparam>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>
I have already checked similar posts and have done necessary changes in eclipse.ini (specifying JDK's JRE as vmargs n all). My dependency in MAven Project looks like below:
<dependency>
<groupId>com.b.t</groupId>
<artifactId>v-p</artifactId>
<version>1.1.0</version>
</dependency>
Please note that the same jar file with corresponding POM.xml is working well for my colleague in Intellij.
I am using Eclipse Luna just for info. I also have checked in my Eclipse that the Installed JRE is jdk1.8.0_144.
Also I am getting the same error when I use mvn clean install on command prompt.
Could someone please suggest what can I check more ?
You cannot just copy the files into your local repo, you need to install them. There are instructions here: https://maven.apache.org/guides/mini/guide-3rd-party-jars-local.html
In your case is would be something like:
mvn install:install-file -Dfile=<path-to-file> -DpomFile=<path-to-pomfile>
I have a common artifact where I store build-tools configuration files, e.g. checkstyle, pmd etc.
I can access the files and everything works as expected when I run from the console. The configuration files are included in my project and the reports are generated as expected when I run mvn site from the console.
However, files that are required by eclipse and should be included when mvn eclipse:eclipse is run are not to be found. I got an error telling me that the files cannot be found.
This is the important part of my POM.xml file:
<build>
<extensions>
<extension>
<groupId>com.foo</groupId>
<artifactId>build-tools</artifactId>
<version>1.0</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<additionalBuildcommands>
<buildcommand>net.sf.eclipsecs.core.CheckstyleBuilder</buildcommand>
</additionalBuildcommands>
<additionalProjectnatures>
<projectnature>net.sf.eclipsecs.core.CheckstyleNature</projectnature>
</additionalProjectnatures>
<additionalConfig>
<file>
<name>.checkstyle</name>
<location>${basedir}/eclipse-checkstyle.xml</location>
</file>
</additionalConfig>
</configuration>
</plugin>
</plugins>
</build>
So my question is how to get maven to understand that these files, which is located in my build-tools artifact, to be included when I run the eclipse:eclipse command?
EDIT: It is the eclipse-checkstyle.xml that cannot be found.
You should add the jar holding the relevant sources as a dependency of the plugin, not an extention:
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
...
</configuration>
<dependencies>
<dependency>
<groupId>com.foo</groupId>
<artifactId>build-tools</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
</plugin>
</plugins>
I am in the process of migrating my build from Ant to Maven. The Ant build used to compile a "code generator", execute this "code generator" which produced a set of Java and C code. It then took the generated Java code and compiled it along with some additional code produce a single jar.
I have replicated this this in Maven quite easily and it works well when I run from the command line but Eclipse is complaining and is giving me an error relating to the pom file
Failure to find {group.id}:{artifact.id}:pom:1.0.0-SNAPSHOT in
http://{our internal site repository}/nexus/content/groups/public was
cached in the local repository, resolution will not be reattempted
until the update interval of snapshots has elapsed or updates are
forced
where the group.id and artifact.id are the group and artifact id of my code generator plugin
and any code that references the generated code also fails to compile.
My maven build consists of
a generator project that contains just the Java code for the code generator.
a generator-plugin project that contains just the code to wrap the generator as a Maven plugin. This is dependent upon the generator project.
an xyz project that uses the plugin to generate the code. The code ends up in the target/generated-sources/xxx folder of this project. I have configured the build-helper-maven-plugin as per Maven compile with multiple src directories to include this extra source directory.
If I manually add the generated source folder to the Eclipse build path all of the errors relating to the code not being there go away on that project but not on any downstream projects and the "Failure to find..." error listed above remains.
What puzzles me a little is that it is referring to the ...:pom:1.0.0-SNAPSHOT when in fact my generator-plugin is defined as a maven-plugin.
Is this a sensible approach?
Why am I getting a "Failure to find..." error?
Why isn't Eclipse picking up my generated-sources folders?
I should also say I have the m2e plugin and the m2e connector for build-help-maven-plugin installed in my Eclipse IDE.
It looks like a problem during the download of the lib from the repository. I already had the same error message once.
Did you take a look at your local repository?
Go to the .m2 folder and look for /nexus/content/groups/public. If the folder is there, open it and see if the lib was download correctly. If not, try to delete the folder and try to run mvn install to force the download of the lib.
At Eclipse, run Right button > Maven > Update Project too.
Are you using an local repository like Artifactory, aren't you? Also look for the lib in the repo1-cache (or similar) folder. See if the jar is there.
Are you behind any firewall or proxy?
Using eclipse Indigo3.7, this was what I found that worked good using spring 3.1.1 which does have the 3.0.6 version as well in it. Once I got the plugins setup and put into the correct area of the pom and included the argline and endorseddirs to have the java sources put out into the target/generated-sources/cxf folder then maven generated the sources ok.
....
<properties>...
<dependencyManagement>
<dependencies>.....
</dependencyManagement>
<dependencies>
<dependency>....
</dependencies>
<!-- *************************** Build process ************************************* -->
<build>
<finalName>projName</finalName>
<plugins>
<!-- Force Java 6 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.4</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<!-- Deployent on AS from console
<plugin>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<version>${version.jboss.as.maven.plugin}</version>
</plugin>
-->
<!-- wildbill added tomcat plugin -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
</plugin>
<!-- Surefire plugin before 2.9 version is buggy. No need to declare here,
it's being referenced below w/ the version
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12</version>
</plugin>
-->
<!-- developer added these -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<compilerArguments>
<endorseddirs>target/generated-sources/cxf</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12</version>
<configuration>
<forkMode>once</forkMode>
<argLine>-Djava.endorsed.dirs=target/generated-sources/cxf</argLine>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<compilerArguments>
<endorseddirs>target/generated-sources/cxf</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<forkMode>once</forkMode>
<argLine>-Djava.endorsed.dirs=target/generated-sources/cxf</argLine>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<configuration>
<artifactItems>
<artifactItem>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2</version>
</artifactItem>
<artifactItem>
<groupId>javax.xml.ws</groupId>
<artifactId>jaxws-api</artifactId>
<version>2.2</version>
</artifactItem>
</artifactItems>
<outputDirectory>target/generated-sources/cxf</outputDirectory>
</configuration>
</plugin>
</plugins>
</build>
<!-- *********************** Profiles ************************************ -->
<profiles>
<profile>
<!-- When built in OpenShift the 'openshift' profile will be
used when invoking mvn. -->
<!-- Use this profile for any OpenShift specific customization
your app will need. -->
<!-- By default that is to put the resulting archive into the
'deployments' folder. -->
<!-- http://maven.apache.org/guides/mini/guide-building-for-different-environments.html -->
<id>projName</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-codegen-plugin</artifactId>
<version>2.5.2</version>
<executions>
<execution>
<id>process-sources</id>
<phase>generate-sources</phase>
<configuration>
<fork>once</fork>
<additionalJvmArgs>-Djava.endorsed.dirs=target/generated-sources/cxf</additionalJvmArgs>
</configuration>
<goals>
<goal>wsdl2java</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-xjc</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
</plugin>
<!-- Actual war created in default target dir -->
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
</plugin>
</plugins>
</build>
</profile>
</profiles>
If your wsdl folder is in ${basedir}/src/main/resources it'll find it automatically
Hope this helps!
When I try to create Maven project with this parameters:
Archetype Group Id - org.codehaus.mojo;
Archetype Artifact Id - gwt-maven-plugin;
Archetype Version - 2.3.0-1.
I get some strange errors:
Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:gwt-maven-plugin:2.3.0-1:generateAsync (execution: default, phase: generate-sources)
Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:gwt-maven-plugin:2.3.0-1:i18n (execution: default, phase: generate-sources)
Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-war-plugin:2.1.1:exploded (execution: default, phase: compile)
And some warnings as:
Implementation of project facet jst.web could not be found. Functionality will be limited.
Implementation of project facet wst.jsdt.web could not be found. Functionality will be limited.
This is my pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<!-- POM file generated with GWT webAppCreator -->
<modelVersion>4.0.0</modelVersion>
<groupId>net.test1</groupId>
<artifactId>TestWebApp</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>GWT Maven Archetype</name>
<properties>
<!-- Convenience property to set the GWT version -->
<gwtVersion>2.3.0</gwtVersion>
<!-- GWT needs at least java 1.5 -->
<webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<version>${gwtVersion}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwtVersion}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<classifier>sources</classifier>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<!-- Generate compiled stuff in the folder used for developing mode -->
<outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>
<plugins>
<!-- GWT Maven Plugin -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>2.3.0-1</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>test</goal>
<goal>i18n</goal>
<goal>generateAsync</goal>
</goals>
</execution>
</executions>
<!-- Plugin configuration. There are many available options, see
gwt-maven-plugin documentation at codehaus.org -->
<configuration>
<runTarget>TestWebApp.html</runTarget>
<hostedWebapp>${webappDirectory}</hostedWebapp>
<i18nMessagesBundle>net.test1.TestWebApp.client.Messages</i18nMessagesBundle>
</configuration>
</plugin>
<!-- Copy static web files before executing gwt:run -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>exploded</goal>
</goals>
</execution>
</executions>
<configuration>
<webappDirectory>${webappDirectory}</webappDirectory>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
And so on. What is this? I have tried all possible manuals on the Internet, and everywhere the same. I tried to create project manualy without eclipse and the same. I think, the problem is that manuals in the Internet was writing for old version of Eclipse, Maven, GWT. How can I beat it? How can I just create simple project with GWT 2.3, Maven2 plugin and Eclipse Indigo without errors end warnings?
This is known behavior, discussed on the eclipse wiki. See here: http://wiki.eclipse.org/M2E_plugin_execution_not_covered.
Don't just comment out the problematic sections of your pom, you really do need them. For instance The generated comment for that maven-war-plugin in the pom is "Copy static web files before executing gwt:run" This turns out to be true. If you comment out that plugin and "mvn clean gwt:run", static files will not be copied to the target folder and be unavailable to hosted mode.
Fortunately the workaround is easy. If you open up the pom in Eclipse, look in the Overview section, and click the error message at the top, it will give you some quick fix options. Such as "Permanently mark goal exploded in pom.xml as ignored." This will add some m2e configuration to your pom so it is no longer flagged as an error, and everything will work as before. The newly generated section in your pom is what is described in the link above as the "ignore" option.
Hope this helps.