Accessing @Autowired beans in Java event handlers in spring boot

BIRT User · September 25, 2017

Hi Team, I am using spring boot application to run the report and to create Java event handlers. I am able to set the spring context using the below code. 
 ApplicationContext sprCtx = ContextAccess.getApplicationContext(); 
config.getAppContext().put("spring",sprCtx); 
Platform.startup( config ); 
 In BIRT event handler class, i have initialized the object using @Autowired annotation. However the bean is not instantiated and it throws NullPointerException when i try to access its methods. 

@Autowired
MyObject obj; 

Any idea how to get the beans autowired in java event handler implicitely?
 
 
I am using ReportDesignHandler which extends ReportEventAdapter. I am overwritting the properties in onPrepare() and beforefactory() methods.

kclark · September 27, 2017

Can you post your code? I'm running into a similar error to you when trying to recreate your issue but I think my error is likely caused by another issue.

BIRT User · October 1, 2017

Hi Clarke,
 
I couldn't attach the files as Zip due to firewall issues.
 
I am using a plain empty report design and with the help of event handler i am adding the elements in it.

@Component 
@Scope("singleton") 
public class ReportEngineFactory implements ApplicationContextAware { 
 private IReportEngineFactory factory; 
 private ApplicationContext context; 
 @PostConstruct 
 public void start() throws BirtException { 
 Platform.startup(); 
 factory = (IReportEngineFactory) Platform.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY); 
 } 
 @SuppressWarnings("unchecked") 
 public IReportEngine createEngine() { 
 EngineConfig config = new EngineConfig(); 
 config.getAppContext().put("spring", this.context); 
 return factory.createReportEngine(config); 
 } 
 @PreDestroy 
 public void shutdown() { 
 Platform.shutdown(); 
 } 
 public void setApplicationContext(ApplicationContext arg0) { 
 this.context = arg0; 
 } 
}

@Service 
public class BirtEngine { 
 private IReportEngine renderEngine = null; 
 private static final String REPORT_DESIGN_NAME = "src/main/resources/TestReport.rptdesign"; 
 @Autowired 
 public BirtEngine(ReportEngineFactory engineFactory) { 
 renderEngine = engineFactory.createEngine(); 
 } 
 public void runAndRenderTask() throws EngineException { 
 IRunAndRenderTask runAndRenderTask = null; 
 IReportRunnable reportRunnable = renderEngine.openReportDesign(REPORT_DESIGN_NAME); 
 runAndRenderTask = renderEngine.createRunAndRenderTask(reportRunnable); 
 runAndRenderTask.setRenderOption(getRenderOption()); 
 runAndRenderTask.run(); 
 runAndRenderTask.close(); 
 } 
 private IRenderOption getRenderOption() { 
 IRenderOption renderOption = new PDFRenderOption(); 
 renderOption.setOutputFormat("pdf"); 
 renderOption.setOutputFileName("TestReport.pdf"); 
 return renderOption; 
 } 
}

public class ReportDesignHandler extends ReportEventAdapter { 
 @Autowired 
 private SampleData sampleData; 
 @Override 
 public void onPrepare(IReportContext reportContext) throws ScriptException { 
 try { 
 
 
 GridHandle newGrid = reportContext.getDesignHandle().getElementFactory().newGridItem("", 2, 1); 
 LabelHandle label1 = reportContext.getDesignHandle().getElementFactory().newLabel("country"); 
 label1.setText(sampleData.getCountryName()); 
 LabelHandle label2 = reportContext.getDesignHandle().getElementFactory().newLabel("city"); 
 label2.setText(sampleData.getCityName()); 
 newGrid.getCell(0, 1).getContent().add(label1); 
 newGrid.getCell(0, 2).getContent().add(label2); 
 
 
 reportContext.getDesignHandle().getBody().add(newGrid); 
 reportContext.getDesignHandle().saveAs("TestSaveAs.rptdesign"); 
 
 } 
 catch (SemanticException | IOException e) { 
 e.printStackTrace(); 
 } 
 } 
}

@Service 
public class SampleData { 
 private String countryName; 
 private String cityName; 
 public SampleData(){ 
 setCountryName("United States"); 
 setCityName("Chicago"); 
 } 
 public String getCountryName() { 
 return countryName; 
 } 
 public void setCountryName(String countryName) { 
 this.countryName = countryName; 
 } 
 public String getCityName() { 
 return cityName; 
 } 
 public void setCityName(String cityName) { 
 this.cityName = cityName; 
 } 
}

Accessing @Autowired beans in Java event handlers in spring boot

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