Java tutorial
/** * This Source Code Form is subject to the terms of the Mozilla Public License, * v. 2.0. If a copy of the MPL was not distributed with this file, You can * obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under * the terms of the Healthcare Disclaimer located at http://openmrs.org/license. * * Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS * graphic logo is a trademark of OpenMRS Inc. */ package org.openmrs.scheduler.web.controller; import java.util.Collection; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.openmrs.api.APIException; import org.openmrs.api.context.Context; import org.openmrs.scheduler.SchedulerException; import org.openmrs.scheduler.SchedulerService; import org.openmrs.scheduler.TaskDefinition; import org.openmrs.web.WebConstants; import org.springframework.beans.propertyeditors.CustomNumberEditor; import org.springframework.context.support.MessageSourceAccessor; import org.springframework.validation.BindException; import org.springframework.validation.Errors; import org.springframework.web.bind.ServletRequestDataBinder; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.SimpleFormController; import org.springframework.web.servlet.view.RedirectView; public class SchedulerListController extends SimpleFormController { /** * Logger for this class and subclasses */ protected static final Log log = LogFactory.getLog(SchedulerListController.class); /** * Service context used to communicate with the services layer. TODO This is not used yet * because we get the context from the session. */ //private Context context; /** * Set the context. * * @param context */ //public void setContext(Context context) { // this.context = context; //} /** * Allows for Integers to be used as values in input tags. Normally, only strings and lists are * expected * * @see org.springframework.web.servlet.mvc.BaseCommandController#initBinder(javax.servlet.http.HttpServletRequest, * org.springframework.web.bind.ServletRequestDataBinder) */ protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception { super.initBinder(request, binder); binder.registerCustomEditor(java.lang.Integer.class, new CustomNumberEditor(java.lang.Integer.class, true)); } /** * The onSubmit function receives the form/command object that was modified by the input form * and saves it to the db * * @see org.springframework.web.servlet.mvc.SimpleFormController#onSubmit(javax.servlet.http.HttpServletRequest, * javax.servlet.http.HttpServletResponse, java.lang.Object, * org.springframework.validation.BindException) */ protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception { HttpSession httpSession = request.getSession(); // //Locale locale = request.getLocale(); String view = getFormView(); StringBuffer success = new StringBuffer(); StringBuffer error = new StringBuffer(); String action = request.getParameter("action"); MessageSourceAccessor msa = getMessageSourceAccessor(); String[] taskList = request.getParameterValues("taskId"); SchedulerService schedulerService = Context.getSchedulerService(); if (taskList != null) { for (String taskId : taskList) { // Argument to pass to the success/error message Object[] args = new Object[] { taskId }; try { TaskDefinition task = schedulerService.getTask(Integer.valueOf(taskId)); // If we can get the name, let's use it if (task != null) { args = new Object[] { task.getName() }; } if (action.equals(msa.getMessage("Scheduler.taskList.delete"))) { if (!task.getStarted()) { schedulerService.deleteTask(Integer.valueOf(taskId)); success.append(msa.getMessage("Scheduler.taskList.deleted", args)); } else { error.append(msa.getMessage("Scheduler.taskList.deleteNotAllowed", args)); } } else if (action.equals(msa.getMessage("Scheduler.taskList.stop"))) { schedulerService.shutdownTask(task); success.append(msa.getMessage("Scheduler.taskList.stopped", args)); } else if (action.equals(msa.getMessage("Scheduler.taskList.start"))) { schedulerService.scheduleTask(task); success.append(msa.getMessage("Scheduler.taskList.started", args)); } } catch (APIException e) { log.warn("Error processing schedulerlistcontroller task", e); error.append(msa.getMessage("Scheduler.taskList.error", args)); } catch (SchedulerException ex) { log.error("Error processing schedulerlistcontroller task", ex); error.append(msa.getMessage("Scheduler.taskList.error", args)); } } } else { error.append(msa.getMessage("Scheduler.taskList.requireTask")); } view = getSuccessView(); if (!"".equals(success.toString())) { httpSession.setAttribute(WebConstants.OPENMRS_MSG_ATTR, success.toString()); } if (!"".equals(error.toString())) { httpSession.setAttribute(WebConstants.OPENMRS_ERROR_ATTR, error.toString()); } return new ModelAndView(new RedirectView(view)); } /** * This is called prior to displaying a form for the first time. It tells Spring the * form/command object to load into the request * * @see org.springframework.web.servlet.mvc.AbstractFormController#formBackingObject(javax.servlet.http.HttpServletRequest) */ protected Object formBackingObject(HttpServletRequest request) throws ServletException { // Get all tasks that are available to be executed return Context.getSchedulerService().getRegisteredTasks(); } /* (non-Javadoc) * @see org.springframework.web.servlet.mvc.SimpleFormController#referenceData(javax.servlet.http.HttpServletRequest, java.lang.Object, org.springframework.validation.Errors) */ @SuppressWarnings("unchecked") @Override protected Map referenceData(HttpServletRequest request, Object command, Errors errors) throws Exception { Map<String, Object> map = new HashMap<String, Object>(); Collection<TaskDefinition> tasks = (Collection<TaskDefinition>) command; Map<TaskDefinition, String> intervals = new HashMap<TaskDefinition, String>(); MessageSourceAccessor msa = getMessageSourceAccessor(); for (TaskDefinition task : tasks) { Long interval = task.getRepeatInterval(); if (interval < 60) { intervals.put(task, interval + " " + msa.getMessage("Scheduler.scheduleForm.repeatInterval.units.seconds")); } else if (interval < 3600) { intervals.put(task, interval / 60 + " " + msa.getMessage("Scheduler.scheduleForm.repeatInterval.units.minutes")); } else if (interval < 86400) { intervals.put(task, interval / 3600 + " " + msa.getMessage("Scheduler.scheduleForm.repeatInterval.units.hours")); } else { intervals.put(task, interval / 86400 + " " + msa.getMessage("Scheduler.scheduleForm.repeatInterval.units.days")); } } map.put("intervals", intervals); return map; } }