<p>I'm trying to package BIRT <strong>4.3.1</strong> in an executable jar using <strong>maven</strong>.
Excerpt from <em>pom.xml</em>:</p><pre class="_prettyXprint"><project [...]> [...] <dependencies> [...] <dependency> <groupId>org.eclipse.birt.runtime</groupId> <artifactId>org.eclipse.birt.runtime</artifactId> <version>4.3.1</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>1.2.1</version> <executions> <execution> <goals> <goal>java</goal> </goals> </execution> </executions> <configuration> <mainClass>com.domain.App</mainClass> </configuration> </plugin> <plugin> <artifactId>maven-assembly-plugin</artifactId> <configuration> <archive> <manifest> <mainClass>com.domain.App</mainClass> </manifest> </archive> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> </configuration> </plugin> </plugins> </build></project></pre><p>The main class, <em>App.java</em>:</p><pre class="_prettyXprint">package com.domain;import org.eclipse.birt.core.exception.BirtException;import org.eclipse.birt.report.engine.api.EngineException;import org.eclipse.birt.report.engine.api.IReportEngine;import org.eclipse.birt.report.engine.api.IReportRunnable;public class App { public static void main(String[] args) { try { IReportEngine birtEngine = BirtEngine.getBirtEngine(); IReportRunnable design = birtEngine .openReportDesign("/path/to/file.rptdesign"); } catch (EngineException e) { e.printStackTrace(); } catch (BirtException e) { e.printStackTrace(); } }}</pre><p><em>BirtEngine.java:</em>
</p><pre class="_prettyXprint">package com.domain;import org.eclipse.birt.report.engine.api.EngineConfig;import org.eclipse.birt.report.engine.api.IReportEngine;import org.eclipse.birt.core.framework.Platform;import org.eclipse.birt.core.exception.BirtException;import org.eclipse.birt.report.engine.api.IReportEngineFactory;public class BirtEngine { private static IReportEngine birtEngine = null; public static synchronized IReportEngine getBirtEngine() throws BirtException { if (birtEngine == null) { EngineConfig config = new EngineConfig(); Platform.startup(config); IReportEngineFactory factory = (IReportEngineFactory) Platform .createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY); birtEngine = factory.createReportEngine(config); } return birtEngine; }}</pre><p>When I run:</p><pre class="_prettyXprint">...$ exec:java</pre><p>I see:</p><pre class="_prettyXprint">[INFO] BUILD SUCCESSFUL</pre><p>But when I run:</p><pre class="_prettyXprint">...$ mvn compile assembly:single...$ java -jar ./target/Test-1.0-SNAPSHOT-jar-with-dependencies.jar</pre><p>I see:</p><pre class="_prettyXprint">[INFO] BUILD SUCCESSFUL</pre><p>followed by:</p><pre class="_prettyXprint">Exception in thread "main" java.lang.NullPointerException at com.domain.BirtEngine.getBirtEngine(BirtEngine.java:23) at com.domain.App.main(App.java:11)</pre><p>BirtEngine.java:23 is:
birtEngine = factory.createReportEngine(config);
App.java:11 is:
IReportEngine birtEngine = BirtEngine.getBirtEngine();
Why do I get an error when packaging BIRT in a <strong>maven jar-with-dependencies</strong>? What should I do differently?
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