Source:
static JobProgressListener setupListeners(SparkContext context) { JobProgressListener pl = new JobProgressListener(context.getConf()) { @Override public synchronized void onJobStart(SparkListenerJobStart jobStart) { super.onJobStart(jobStart); int jobId = jobStart.jobId(); String jobGroupId = jobStart.properties().getProperty("spark.jobGroup.id"); String uiEnabled = jobStart.properties().getProperty("spark.ui.enabled"); String jobUrl = getJobUrl(jobId); String noteId = Utils.getNoteId(jobGroupId); String paragraphId = Utils.getParagraphId(jobGroupId); if (uiEnabled != "false" && jobUrl != null) { RemoteEventClientWrapper eventClient = BaseZeppelinContext.getEventClient(); Map<String, String> infos = new java.util.HashMap<>(); infos.put("jobUrl", jobUrl); infos.put("label", "SPARK JOB"); infos.put("tooltip", "View in Spark web UI"); if (eventClient != null) { eventClient.onParaInfosReceived(noteId, paragraphId, infos); } } } private String getJobUrl(int jobId) { String jobUrl = null; if (sparkUrl != null) { jobUrl = sparkUrl + "/jobs/job?id=" + jobId; } return jobUrl; } }; try { Object listenerBus = context.getClass().getMethod("listenerBus").invoke(context); Method[] methods = listenerBus.getClass().getMethods(); Method addListenerMethod = null; for (Method m : methods) { if (!m.getName().equals("addListener")) { continue; } Class<?>[] parameterTypes = m.getParameterTypes(); if (parameterTypes.length != 1) { continue; } if (!parameterTypes[0].isAssignableFrom(JobProgressListener.class)) { continue; } addListenerMethod = m; break; } if (addListenerMethod != null) { addListenerMethod.invoke(listenerBus, pl); } else { return null; } } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { logger.error(e.toString(), e); return null; } return pl; }

Target:
static JobProgressListener setupListeners(SparkContext context) { JobProgressListener pl = new JobProgressListener(context.getConf()) { @Override public synchronized void onJobStart(SparkListenerJobStart jobStart) { super.onJobStart(jobStart); int jobId = jobStart.jobId(); String jobGroupId = jobStart.properties().getProperty("spark.jobGroup.id"); String uiEnabled = jobStart.properties().getProperty("spark.ui.enabled"); String jobUrl = getJobUrl(jobId); String noteId = Utils.getNoteId(jobGroupId); String paragraphId = Utils.getParagraphId(jobGroupId); java.lang.Boolean showSparkUI = uiEnabled == null || !uiEnabled.trim().toLowerCase().equals("false"); if (showSparkUI && jobUrl != null) { RemoteEventClientWrapper eventClient = BaseZeppelinContext.getEventClient(); Map<String, String> infos = new java.util.HashMap<>(); infos.put("jobUrl", jobUrl); infos.put("label", "SPARK JOB"); infos.put("tooltip", "View in Spark web UI"); if (eventClient != null) { eventClient.onParaInfosReceived(noteId, paragraphId, infos); } } } private String getJobUrl(int jobId) { String jobUrl = null; if (sparkUrl != null) { jobUrl = sparkUrl + "/jobs/job?id=" + jobId; } return jobUrl; } }; try { Object listenerBus = context.getClass().getMethod("listenerBus").invoke(context); Method[] methods = listenerBus.getClass().getMethods(); Method addListenerMethod = null; for (Method m : methods) { if (!m.getName().equals("addListener")) { continue; } Class<?>[] parameterTypes = m.getParameterTypes(); if (parameterTypes.length != 1) { continue; } if (!parameterTypes[0].isAssignableFrom(JobProgressListener.class)) { continue; } addListenerMethod = m; break; } if (addListenerMethod != null) { addListenerMethod.invoke(listenerBus, pl); } else { return null; } } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { logger.error(e.toString(), e); return null; } return pl; }