How to deploy ear into WildFly 8.0 via eclipse IDE - eclipse

Question

I have installed the JBoss AS tools in my eclipse. Then I have created an WildFly 8.0 server. I have parent project pom.xml 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>
<groupId>com.company</groupId>
<artifactId>trx-server-parent</artifactId>
<version>1.0.0</version>
<packaging>pom</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java-version>1.7</java-version>
<javaee-api-version>7.0</javaee-api-version>
</properties>
<modules>
<module>trx-server-ear</module>
<module>trx-server-domain</module>
<module>trx-server-services</module>
<module>trx-server-web</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>${javaee-api-version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<pluginManagement>
<plugins>
<!-- compiler plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>${java-version}</source>
<target>${java-version}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.5</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ejb-plugin</artifactId>
<version>2.4</version>
<configuration>
<ejbVersion>3.2</ejbVersion>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<version>2.9.1</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
And ear project pom.xml is 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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.company</groupId>
<artifactId>trx-server-parent</artifactId>
<version>1.0.0</version>
</parent>
<artifactId>trx-server-ear</artifactId>
<packaging>ear</packaging>
<dependencies>
<dependency>
<groupId>com.company</groupId>
<artifactId>trx-server-web</artifactId>
<version>${project.version}</version>
<type>war</type>
</dependency>
<dependency>
<groupId>com.company</groupId>
<artifactId>trx-server-services</artifactId>
<version>${project.version}</version>
<type>ejb</type>
</dependency>
</dependencies>
<build>
<finalName>trx-server</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<configuration>
<finalName>trx-server</finalName>
<version>7</version>
<defaultJavaBundleDir>lib/</defaultJavaBundleDir>
<modules>
<webModule>
<groupId>com.company</groupId>
<artifactId>trx-server-web</artifactId>
<contextRoot>/trx-server-web</contextRoot>
</webModule>
<ejbModule>
<groupId>com.company</groupId>
<artifactId>trx-server-services</artifactId>
</ejbModule>
</modules>
</configuration>
</plugin>
</plugins>
</build>
</project>
I defined the trx-server-domain module as jar file and packaged into the lib folder. When run mvn clean install on my parent pom.xml, I got an ear file named trx-server.ear. Then the trx-server.ear file structure is like:
-- trx-server
-- lib
-- trx-server-domain-1.0.0.jar
-- trx-server-services-1.0.0.jar
-- trx-server-web-1.0.0.war
I can deploy this ear file to WildFly server manually (via web management page). Everything is fine for that.
My problem is when I deploy some changes via Eclipse, I mean via the server adapter. The root web contextRoot is not what I defined in the ear project pom.xml file. And the trx-server-domain will be deploy as EJB which should be a jar file under lib folder.
I got a trx-server-ear.ear folder in the WildFly deployments directory which is not what I wanted. The structures of this folder is:
trx-server-ear.ear
-- trx-server-domain-1.0.0.jar
-- trx-server-services-1.0.0.jar
-- trx-server-web-1.0.0.war
No lib folder and all jar/war files are in same level.
The problem only exist when I deploy the ear in the Eclipse. Is there any other plungin I should install?
Anyone could give me example of how to configure the ear with multiple modules?