create a executable jar using maven and jetty

I want to start my application using jetty, so I have added the dependency mentioned below. and when I run the main method Jetty starts successfully.(I am working on a struts2+spring3+ hibernate maven project, i am able to deploy it in tomcat too)

Now I want to create a executable jar from a war packaging pom. So i added maven-assembly-plugin to my pom. (I tried with maven jar plug-in but it was not adding the dependencies)

Sources

plugins

<build>
    <plugins>
        <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.3</version>
        <configuration>
                 <archive>
            <manifest>
        <mainClass>com.dca.engine.StartDCA</mainClass>
            </manifest>
             </archive>
        <packagingExcludes>WEB-INF/lib/jetty*.jar,WEB-INF/lib/org.apache.taglibs.standard.glassfish*.jar,WEB-INF/lib/org.apache.jasper.glassfish*.jar,WEB-INF/lib/org.eclipse.jdt.core*.jar,WEB-INF/lib/javax.servlet.jsp*.jar,WEB-INF/lib/javax.el*.jar</packagingExcludes>
        <escapeString>\</escapeString>
        </configuration>
       </plugin>
       <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>2.4</version>
        <configuration>
                 <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                 </descriptorRefs>
             <archive>
            <manifest>
        <mainClass>com.dca.engine.StartDCA</mainClass>
            </manifest>
             </archive>
        </configuration>
        <executions>
             <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                      <goal>single</goal>
                    </goals>
             </execution>
        </executions>
    </plugin>
 </plugins>
<resources>
    <resource>
        <directory>src/main/java</directory>
        <includes>
        <include>**/*.java</include>
        <include>**/*.xml</include>
        </includes>
    </resource>
    <resource>
        <directory>src/main/resources</directory>
        <filtering>true</filtering>
    </resource>
</resources>
</build>

Embedded Jetty

<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-server</artifactId>
    <version>8.1.10.v20130312</version>
</dependency>
<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-webapp</artifactId>
    <version>8.1.10.v20130312</version>
    <!-- <scope>provided</scope> -->
</dependency>
<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-jsp</artifactId>
    <version>8.1.10.v20130312</version>
    <!-- <scope>provided</scope>  -->
</dependency>

main method

 Server server = new Server(8080);
        System.setProperty("is_DCA", "YES");
        WebAppContext webAppContext = new WebAppContext();
        webAppContext.setResourceBase("/home/myfolder/workspace/app/dca/src/main/webapp");
        webAppContext.setDescriptor("/home/myfolder/workspace/app/dca/src/main/webapp/WEB-INF/web.xml");
        webAppContext.setContextPath("/app");
        server.setHandler(webAppContext);
        server.start();
        server.join();

Starting the application

I run the created jar with java -jar /home/myfolder/workspace/app/dca/target/app-dca-1.0-jar-with-dependencies.jar

jetty starts with exception.

INFO  10-12 15:03:01,609 - jetty-8.y.z-SNAPSHOT
INFO  10-12 15:03:01,776 - Initializing Spring root WebApplicationContext
INFO  10-12 15:03:01,776 - Root WebApplicationContext: initialization started
INFO  10-12 15:03:01,843 - Refreshing Root WebApplicationContext: startup date [Tue Dec 10 15:03:01 IST 2013]; root of context hierarchy
INFO  10-12 15:03:01,885 - Loading XML bean definitions from class path resource [applicationContext-dca.xml]
ERROR 10-12 15:03:05,725 - Context initialization failed
org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/util]
Offending resource: class path resource [applicationContext-dca.xml]

    at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
    at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
    at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:80)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:316)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1420)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1413)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)

Is there a possible way that i can start jetty using the war created. It has jars in /WEB-INF/lib/ folder, all properties file and xml files are in /WEB-INF/lib/ and I tried running the war

java -jar /home/myfolder/workspace/app/dca/target/app-dca-1.0.war

but it was not able to locate the main class.

worked when created executable war check sumit's answer

I was getting the exception as in this question. when I replaced jetty version to 7.6.7.v20120910 it worked

i dont know why it didn't worked with jetty 8.1.10.v20130312

回答1:

Take a look at http://uguptablog.blogspot.com/2012/09/embedded-jetty-executable-war-with.html

The relevant code is

    ProtectionDomain domain = Main.class.getProtectionDomain();
    URL location = domain.getCodeSource().getLocation();
    WebAppContext webapp = new WebAppContext();
    webapp.setContextPath("/");
    webapp.setWar(location.toExternalForm());
    server.setHandler(webapp);

hope that helps.

回答2:

Instead of hacking the contents of a WAR file, as the accepted answer seems to be doing, you can create an executable JAR file using the maven-shade-plugin. This has the following advantages:

The plugin contains "transformers" for merging the contents of META-INF/services, LICENSE and README files.
You end up with a JAR file. WAR files were not designed to be executable (although it works).
By unpacking all dependencies into the same JAR file, you are forced to remove duplicate classes and make the contents harder to reverse-engineer.

回答3:

If you are not tied to using Jetty but are open to using Tomcat instead, the following will work beautifully:

<plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.0</version>
    <executions>
        <execution>
            <id>tomcat-run</id>
            <goals>
                <goal>exec-war-only</goal>
            </goals>
            <phase>package</phase>
            <configuration>
                <path>/standalone</path>
                <enableNaming>false</enableNaming>
                <finalName>standalone.jar</finalName>
                <charset>utf-8</charset>
            </configuration>
        </execution>
    </executions>
</plugin>

This will create an uberjar called "standalone.jar" that you can then run simply by calling

java -jar standalone.jar

this will start the application on http://localhost:8080/standalone

Selecting an alternate port is easy

java -jar standalone.jar -httpPort=7070

Thanks to Tomasz Nurkiewicz's blog entry for highlighting this http://www.nurkiewicz.com/2012/11/standalone-web-application-with.html

回答4:

The simpliest way I know (but never tried) is the winstone-maven-plugin, like Jenkins CI do (what a better example :D). It doesn't use Jetty (even I love this tool :D), but Winstone.

Maven Plugin Usage

<plugin>
    <groupId>net.sf.alchim</groupId>
    <artifactId>winstone-maven-plugin</artifactId>
    <executions>
        <execution>
            <goals>
                <goal>embed</goal>
            </goals>
            <phase>package</phase>
        </execution>
    </executions>
</plugin>

Quite easy, isn't it ? :) It would generate a executable - standalone - jar : app-dca-1.0-standalone.jar

Documentation

Winstone Servlet Container : http://winstone.sourceforge.net/
Winstone Maven plugin : http://alchim.sourceforge.net/winstone-maven-plugin/usage.html
A full example : http://www.jayway.com/2008/11/28/executable-war-with-winstone-maven-plugin/