Java tutorial
/** * Copyright (C) 2015 Orange * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.francetelecom.clara.cloud.presentation; import org.apache.commons.lang3.exception.ExceptionUtils; import org.apache.wicket.Session; import org.apache.wicket.core.request.handler.PageProvider; import org.apache.wicket.core.request.handler.RenderPageRequestHandler; import org.apache.wicket.protocol.http.WebApplication; import org.apache.wicket.request.IRequestHandler; import org.apache.wicket.request.Url; import org.apache.wicket.request.cycle.IRequestCycleListener; import org.apache.wicket.request.cycle.RequestCycle; import org.slf4j.LoggerFactory; import org.slf4j.MDC; import com.francetelecom.clara.cloud.commons.BusinessException; import com.francetelecom.clara.cloud.commons.ResourceNotFoundException; import com.francetelecom.clara.cloud.presentation.tools.WicketSession; import com.francetelecom.clara.cloud.scalability.ManageStatistics; import com.francetelecom.clara.cloud.scalability.helper.PaasStats; /** * Exception handler to display messages Updated : $LastChangedDate$ * */ public class ExecutionHandlerRequestCycle implements IRequestCycleListener { /** * logger */ private static final transient org.slf4j.Logger logger = LoggerFactory .getLogger(ExecutionHandlerRequestCycle.class); private ManageStatistics manageStatistics; private long statsSnapshotId; private WebPageFactory webPageFactory; private static Integer lastRequestId = 0; private static final Integer MAX_VALUE = Integer.MAX_VALUE; /** * Key in logback context for connected user SSOID when available */ public static final String LOG_KEY_USER = "user_ssoid"; /** * Key in logback context for connected user name when available */ public static final String LOG_KEY_USERNAME = "user_name"; /** * Key in logback context for connected wicket session ID when available */ public static final String LOG_KEY_SESSION = "session"; private static final synchronized Integer nextRequestId() { logger.trace("lastRequestId = {}", lastRequestId); lastRequestId = (lastRequestId % MAX_VALUE) + 1; return lastRequestId; } public ExecutionHandlerRequestCycle(WebApplication application, WebPageFactory webPageFactory) { manageStatistics = ((WicketApplication) application).getManageStatistics(); if (webPageFactory == null) throw new IllegalArgumentException("Invalid value <" + webPageFactory + "> for webPageFactory"); this.webPageFactory = webPageFactory; } protected boolean isRequestAMainPage(RequestCycle cycle) { String requestPage = cycle.getRequest().getContextPath(); return !requestPage.endsWith(".css") && !requestPage.endsWith(".js"); } /** * Init of user for wdm-core ActionContext and call parentMethod */ @Override public void onBeginRequest(RequestCycle cycle) { if (manageStatistics != null && manageStatistics.isStatEnable() && isRequestAMainPage(cycle)) { statsSnapshotId = manageStatistics.startSnapshot(cycle.getRequest().getUrl().getPath()); // request.getPath()); } if (cycle.getRequest() != null) { try { WicketSession wicketSession = (WicketSession) Session.get(); if (wicketSession.getPaasUser() != null) { MDC.put(LOG_KEY_USER, wicketSession.getPaasUser().getSsoId().getValue()); MDC.put(LOG_KEY_USERNAME, wicketSession.getPaasUser().getFirstName()); MDC.put(LOG_KEY_SESSION, wicketSession.getId()); } } catch (Exception e) { // Ignore it } final int requestId = nextRequestId(); logger.trace("Setting MDC-requestId param to {}", requestId); MDC.put("requestId", requestId + ""); if (cycle.getRequest().getUrl() != null) { String urlPath = cycle.getRequest().getUrl().getPath(); logger.trace("Setting MDC-page param to {}", urlPath); MDC.put("page", urlPath); String url = cycle.getRequest().getUrl().toString(); logger.trace("Setting MDC-url param to {}", url); MDC.put("url", url); } } } @Override public void onEndRequest(RequestCycle cycle) { logger.trace("Removing MDC-requestId"); MDC.remove("requestId"); logger.trace("Removing MDC-page"); MDC.remove("page"); logger.trace("Removing MDC-page"); MDC.remove("page"); if (manageStatistics != null && manageStatistics.isStatEnable() && isRequestAMainPage(cycle)) { try { PaasStats stats = manageStatistics.endSnapShot(statsSnapshotId); WicketSession session = WicketSession.get(); session.addStats(stats); } catch (ResourceNotFoundException rnfe) { logger.error("stats error (url:{}): {}", cycle.getRequest().getUrl(), rnfe.getMessage()); } catch (BusinessException be) { logger.error("stats error : {}", be.getMessage(), be); } } MDC.remove(LOG_KEY_USER); MDC.remove(LOG_KEY_USERNAME); MDC.remove(LOG_KEY_SESSION); } @Override /* * * This method is executed when an exception is caught by wicket */ public IRequestHandler onException(RequestCycle cycle, Exception e) { logger.error("RunTimeException {}", e); cleanMDC(); //get the required anemic view to display exception ExceptionView view = new ExceptionViewFactory(webPageFactory).newView(e); //create a specific presenter to inject error details into the view ExceptionPresenter presenter = new ExceptionPresenter(view); presenter.onException(ExceptionUtils.getRootCause(e)); //return the view with injected error details return new RenderPageRequestHandler(new PageProvider(view.asPage())); } private void cleanMDC() { logger.trace("Removing MDC-requestId"); MDC.remove("requestId"); logger.trace("Removing MDC-page"); MDC.remove("page"); logger.trace("Removing MDC-url"); MDC.remove("url"); } @Override public void onDetach(RequestCycle cycle) { // To change body of implemented methods use File | Settings | File // Templates. } @Override public void onRequestHandlerResolved(RequestCycle cycle, IRequestHandler handler) { // To change body of implemented methods use File | Settings | File // Templates. } @Override public void onRequestHandlerScheduled(RequestCycle cycle, IRequestHandler handler) { // To change body of implemented methods use File | Settings | File // Templates. } @Override public void onExceptionRequestHandlerResolved(RequestCycle cycle, IRequestHandler handler, Exception exception) { // To change body of implemented methods use File | Settings | File // Templates. } @Override public void onRequestHandlerExecuted(RequestCycle cycle, IRequestHandler handler) { // To change body of implemented methods use File | Settings | File // Templates. } @Override public void onUrlMapped(RequestCycle cycle, IRequestHandler handler, Url url) { // To change body of implemented methods use File | Settings | File // Templates. } }