birt-reports-spring-boot

<dependency>
    <groupId>com.innoventsolutions.birt.runtime</groupId>
    <artifactId>org.eclipse.birt.runtime_4.8.0-20180626</artifactId>
    <version>4.8.0</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-logging</artifactId>
    <exclusions>
        <exclusion>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
        </exclusion>
    </exclusions>
</dependency>

@PostConstruct
protected void initialize() throws BirtException {
    EngineConfig config = new EngineConfig();
    config.getAppContext().put("spring", this.context);
    Platform.startup(config);
    IReportEngineFactory factory = (IReportEngineFactory) Platform
      .createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);
    birtEngine = factory.createReportEngine(config);
    imageFolder = System.getProperty("user.dir") + File.separatorChar + reportsPath + imagesPath;
    loadReports();
}

@Override
public void destroy() {
    birtEngine.destroy();
    Platform.shutdown();
}

private void generatePDFReport(IReportRunnable report, HttpServletResponse response,
  HttpServletRequest request) {
    IRunAndRenderTask runAndRenderTask = birtEngine.createRunAndRenderTask(report);
    response.setContentType(birtEngine.getMIMEType("pdf"));
    IRenderOption options = new RenderOption();
    PDFRenderOption pdfRenderOption = new PDFRenderOption(options);
    pdfRenderOption.setOutputFormat("pdf");
    runAndRenderTask.setRenderOption(pdfRenderOption);
    runAndRenderTask.getAppContext().put(EngineConstants.APPCONTEXT_PDF_RENDER_CONTEXT, request);

    try {
        pdfRenderOption.setOutputStream(response.getOutputStream());
        runAndRenderTask.run();
    } catch (Exception e) {
        throw new RuntimeException(e.getMessage(), e);
    } finally {
        runAndRenderTask.close();
    }
}

private void generateHTMLReport(IReportRunnable report, HttpServletResponse response,
  HttpServletRequest request) {
    IRunAndRenderTask runAndRenderTask = birtEngine.createRunAndRenderTask(report);
    response.setContentType(birtEngine.getMIMEType("html"));
    IRenderOption options = new RenderOption();
    HTMLRenderOption htmlOptions = new HTMLRenderOption(options);
    htmlOptions.setOutputFormat("html");
    htmlOptions.setBaseImageURL("/" + reportsPath + imagesPath);
    htmlOptions.setImageDirectory(imageFolder);
    htmlOptions.setImageHandler(htmlImageHandler);
    runAndRenderTask.setRenderOption(htmlOptions);
    runAndRenderTask.getAppContext().put(
      EngineConstants.APPCONTEXT_BIRT_VIEWER_HTTPSERVET_REQUEST, request);

    try {
        htmlOptions.setOutputStream(response.getOutputStream());
        runAndRenderTask.run();
    } catch (Exception e) {
        throw new RuntimeException(e.getMessage(), e);
    } finally {
        runAndRenderTask.close();
    }
}

@SpringBootApplication
@EnableWebMvc
public class ReportEngineApplication implements WebMvcConfigurer {
    @Value("${reports.relative.path}")
    private String reportsPath;
    @Value("${images.relative.path}")
    private String imagesPath;

    ...

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry
          .addResourceHandler(reportsPath + imagesPath + "/**")
          .addResourceLocations("file:///" + System.getProperty("user.dir") + "/"
            + reportsPath + imagesPath);
    }
}