Java tutorial
/** * EasySOA Registry * Copyright 2011 Open Wide * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * Contact : easysoa-dev@googlegroups.com */ package org.easysoa.registry.dbb.rest; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Map.Entry; import javax.servlet.http.HttpServletRequest; import javax.ws.rs.GET; import javax.ws.rs.POST; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.Context; import javax.ws.rs.core.UriInfo; import org.apache.http.NameValuePair; import org.apache.http.client.utils.URLEncodedUtils; import org.apache.log4j.Logger; import org.easysoa.registry.DocumentService; import org.easysoa.registry.dbb.BrowsingContext; import org.easysoa.registry.dbb.FoundService; import org.easysoa.registry.dbb.ServiceFinderService; import org.easysoa.registry.dbb.ServiceFinderStrategy; import org.easysoa.registry.rest.EasysoaModuleRoot; import org.easysoa.registry.types.Endpoint; import org.json.JSONArray; import org.json.JSONObject; import org.nuxeo.ecm.core.api.CoreSession; import org.nuxeo.ecm.core.api.DocumentModel; import org.nuxeo.ecm.core.api.DocumentModelList; import org.nuxeo.ecm.webengine.jaxrs.session.SessionFactory; import org.nuxeo.ecm.webengine.model.WebObject; import org.nuxeo.runtime.api.Framework; import com.sun.jersey.api.core.HttpContext; /** * REST service to find WSDLs from given URL. * * Use: .../nuxeo/site/easysoa/servicefinder/{url} * Params: {url} The URL of the page to consider (not encoded). * Other protocols than HTTP are not supported. * * @author mkalam-alami * */ @Path("easysoa/servicefinder") //@Produces("application/x-javascript") // doesn't work for bookmarklet's jquery $.ajax() in jsonp ("parsing error") @Produces("application/javascript") // required (?!) for bookmarklet's jquery $.ajax() in jsonp (else "parsing error") @WebObject(type = "servicefinder") public class ServiceFinderRest extends EasysoaModuleRoot { private static Logger logger = Logger.getLogger(ServiceFinderRest.class); private DocumentModelList endpointsCache = null; private List<String> environmentsNamesCache = null; @GET public Object getDefault() { return "Invalid use (please append an address to explore to the URL)"; } /** * Computes a list of all existing environments, by analysing the endpoints properties. * @return * @throws Exception */ @GET @Path("/environments") public Object getEnvironmentList() throws Exception { CoreSession session = SessionFactory.getSession(request); DocumentService docService = Framework.getService(DocumentService.class); DocumentModelList allEndpoints = docService.query(session, "SELECT * FROM " + Endpoint.DOCTYPE, true, false); // TODO Phase (LATER +component) // Use a cache for performance boolean computeEnvList = true; if (environmentsNamesCache != null) { if (endpointsCache != null && endpointsCache.equals(allEndpoints)) { computeEnvList = false; } } if (computeEnvList) { List<String> environmentsNames = new ArrayList<String>(); for (DocumentModel endpoint : allEndpoints) { String environmentName = (String) endpoint.getPropertyValue(Endpoint.XPATH_ENDP_ENVIRONMENT); if (environmentName != null && !environmentsNames.contains(environmentName)) { environmentsNames.add(environmentName); } } endpointsCache = allEndpoints; environmentsNamesCache = environmentsNames; } return new JSONArray(environmentsNamesCache).toString(); } /** * JSONP for bookmarklet * NB. requires application/javascript mimetype to work on bookmarklet's * jquery $.ajax() side in jsonp, but doesn't work if set here, has to be put at the tope * @param uriInfo * @return * @throws Exception */ @GET @Path("/find/{url:.*}") public Object findServices(@Context UriInfo uriInfo) throws Exception { URL url = null; String callback = null; try { // Retrieve URL String restServiceURL = uriInfo.getBaseUri().toString() + "easysoa/servicefinder/find/"; url = new URL(uriInfo.getRequestUri().toString().substring(restServiceURL.length())); if (url.getQuery() != null && url.getQuery().contains("callback=")) { List<NameValuePair> queryTokens = URLEncodedUtils.parse(url.toURI(), "UTF-8"); for (NameValuePair token : queryTokens) { if (token.getName().equals("callback")) { callback = token.getValue(); // now let's remove this callback from original jsonp URL } } } } catch (MalformedURLException e) { logger.debug(e); return "{ errors: '" + formatError(e) + "' }"; } // Find WSDLs String foundServicesJson = findServices(new BrowsingContext(url)); String res; if (callback != null) { res = callback + '(' + foundServicesJson + ");"; // ')' // TODO OK } else { res = foundServicesJson; } return res; } @POST public Object findServices(@Context HttpContext httpContext, @Context HttpServletRequest request) throws Exception { // Retrieve params @SuppressWarnings("unchecked") Map<String, String> formValues = getFirstValues(request.getParameterMap()); // Find WSDLs BrowsingContext browsingContext = new BrowsingContext(new URL(formValues.get("url")), formValues.get("data")); return findServices(browsingContext); } public String findServices(BrowsingContext context) throws Exception { JSONArray errors = new JSONArray(); JSONObject result = new JSONObject(); // Run finders List<FoundService> foundServices = new LinkedList<FoundService>(); if (context.getURL() != null && context.getData() != null) { ServiceFinderService finderComponent = Framework.getService(ServiceFinderService.class); List<ServiceFinderStrategy> strategies = finderComponent.getStrategies(); for (ServiceFinderStrategy strategy : strategies) { List<FoundService> strategyResult = null; try { strategyResult = strategy.findFromContext(context); } catch (Exception e) { errors.put(formatError(e, "Failed to run service finder strategy " + strategy.getClass().getName())); } if (strategyResult != null) { foundServices.addAll(strategyResult); } } } // TODO: Filter duplicates // Format response JSONObject foundLinks = new JSONObject(); for (FoundService foundService : foundServices) { String appName = foundService.getApplicationName(); if (appName != null) { result.put("applicationName", appName); } foundLinks.put(foundService.getName(), foundService.getURL()); } if (foundLinks.keys().hasNext()) { result.put("foundLinks", foundLinks); } if (errors.length() > 0) { result.put("errors", errors); } return result.toString(); } private static Map<String, String> getFirstValues(Map<String, String[]> multivaluedMap) { Map<String, String> map = new HashMap<String, String>(); for (Entry<String, String[]> entry : multivaluedMap.entrySet()) { if (entry.getValue().length > 0) { map.put(entry.getKey(), entry.getValue()[0]); } } return map; } private String formatError(Exception e, String message) { return e.getClass().getSimpleName() + ": " + message + " (cause: " + e.getMessage() + ")"; } private String formatError(Exception e) { return e.getClass().getSimpleName() + ": " + e.getMessage(); } }