GWTP Boilerplate Generation with Maven - build success inconsistency - eclipse

Question

I'm fairly new to Maven, but I'm using it because that's what the GWTP plugin gives when you create a new project. I have a few DTOs I'm creating using the #GenDto annotation. The following is my pom.xml file:
<?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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>MyProject</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>MyProject</name>
<properties>
<!-- client -->
<gwt.version>2.7.0</gwt.version>
<gwtp.version>1.5</gwtp.version>
<gin.version>2.1.2</gin.version>
<!-- server -->
<guice.version>3.0</guice.version>
<resteasy.version>3.0.13.Final</resteasy.version>
<jbcrypt.version>0.3m</jbcrypt.version>
<jax-rs.version>1.1.1</jax-rs.version>
<arcbees.version>1.2</arcbees.version>
<!-- testing -->
<junit.version>4.12</junit.version>
<jukito.version>1.4.1</jukito.version>
<!-- maven -->
<gwt-maven-plugin.version>2.7.0</gwt-maven-plugin.version>
<maven-surefire-plugin.version>2.17</maven-surefire-plugin.version>
<maven-compiler-plugin.version>3.2</maven-compiler-plugin.version>
<maven-war-plugin.version>2.5</maven-war-plugin.version>
<maven-resources-plugin.version>2.5</maven-resources-plugin.version>
<maven-processor-plugin.version>2.0.5</maven-processor-plugin.version>
<maven-build-helper-plugin.version>1.7</maven-build-helper-plugin.version>
<target.jdk>1.7</target.jdk>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
</properties>
<build>
<outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.bsc.maven</groupId>
<artifactId>maven-processor-plugin</artifactId>
<version>2.2.4</version>
<executions>
<execution>
<id>process</id>
<goals>
<goal>process</goal>
</goals>
<phase>generate-sources</phase>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-processors</artifactId>
<version>${gwtp.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${project.build.directory}/generated-sources</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${target.jdk}</source>
<target>${target.jdk}</target>
<encoding>${project.build.sourceEncoding}</encoding>
<compilerArgument>-proc:none</compilerArgument>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>${maven-war-plugin.version}</version>
<configuration>
<archiveClasses>true</archiveClasses>
</configuration>
</plugin>
<!-- JUnit Testing - skip *.GwtTest cases -->
<!-- 'mvn test' - runs the Jukito tests -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<includes>
<include>**/*Test.java</include>
</includes>
<excludes>
<exclude>**/*GwtTest.java</exclude>
</excludes>
</configuration>
</plugin>
<!-- GWT -->
<!-- 'mvn gwt:run' - runs development mode -->
<!-- 'mvn gwt:debug' - runs debug mode -->
<!-- 'mvn gwt:compile' - compiles gwt -->
<!-- 'mvn integration-test' - runs the gwt tests (*GwtTest.java) -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>${gwt-maven-plugin.version}</version>
<configuration>
<!-- With multiple tests use GwtTestSuite.java for speed -->
<includes>**/*GwtTest.java</includes>
<bindAddress>0.0.0.0</bindAddress>
<extraJvmArgs>-Xss1024K -Xmx1024M -XX:MaxPermSize=256M</extraJvmArgs>
<logLevel>TRACE</logLevel>
<copyWebapp>true</copyWebapp>
<hostedWebapp>${webappDirectory}</hostedWebapp>
<runTarget>MyProject.jsp</runTarget>
<modules>
<module>com.test.MyProject</module>
</modules>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<!-- Google Web Toolkit -->
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwt.version}</version>
</dependency>
<!-- GWT-Platform -->
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-mvp-client</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-dispatch-rpc-client</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-dispatch-rpc-server-guice</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-dispatch-rpc-shared</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-dispatch-rest</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform.extensions</groupId>
<artifactId>dispatch-rest-delegates</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-dispatch-rest-shared</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>com.gwtplatform</groupId>
<artifactId>gwtp-processors</artifactId>
<version>${gwtp.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.0.2.Final</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.12.1.1</version>
</dependency>
<!-- DI -->
<dependency>
<groupId>com.google.inject</groupId>
<artifactId>guice</artifactId>
<version>${guice.version}</version>
</dependency>
<dependency>
<groupId>com.google.inject.extensions</groupId>
<artifactId>guice-servlet</artifactId>
<version>${guice.version}</version>
</dependency>
<dependency>
<groupId>com.google.inject.extensions</groupId>
<artifactId>guice-assistedinject</artifactId>
<version>${guice.version}</version>
</dependency>
<dependency>
<groupId>com.google.inject.extensions</groupId>
<artifactId>guice-persist</artifactId>
<version>${guice.version}</version>
</dependency>
<dependency>
<groupId>com.google.gwt.inject</groupId>
<artifactId>gin</artifactId>
<version>${gin.version}</version>
</dependency>
<dependency>
<groupId>org.mindrot</groupId>
<artifactId>jbcrypt</artifactId>
<version>${jbcrypt.version}</version>
</dependency>
<dependency>
<groupId>com.arcbees</groupId>
<artifactId>guicy-resteasy</artifactId>
<version>${arcbees.version}</version>
</dependency>
<!-- REST -->
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>${resteasy.version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson2-provider</artifactId>
<version>${resteasy.version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-guice</artifactId>
<version>${resteasy.version}</version>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>jsr311-api</artifactId>
<version>${jax-rs.version}</version>
<!-- Provided because RestEasy has its own implementation -->
<scope>provided</scope>
</dependency>
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jukito</groupId>
<artifactId>jukito</artifactId>
<version>${jukito.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
It works just fine if I do a Maven build with the goals clean gwt:run, but then any subsequent builds with only the goal gwt:run will error, saying duplicate class: com.test.shared.dto.LoginDto.
If I follow the suggestion here to add <compilerArgument>-proc:none</compilerArgument>, then the subsequent builds work. However, with the original clean gwt:run goals, it'll fail, saying cannot find symbol: class LoginDto.
Is there any way to make it so that the two builds are consistent?

Answer 1

This is a bug of the maven-compiler-plugin 3.2 (and 3.1 IIRC). Downgrade to 3.0, and add the build-helper-maven-compiler to add the generated source folder as a source folder in the process-classes phase (important is "after compile phase").