Sat, 23 May 2020 13:52:04 +0200
bloat removal 2/3 - moduleInfo
universe@7 | 1 | /* |
universe@7 | 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
universe@34 | 3 | * |
universe@24 | 4 | * Copyright 2018 Mike Becker. All rights reserved. |
universe@34 | 5 | * |
universe@7 | 6 | * Redistribution and use in source and binary forms, with or without |
universe@7 | 7 | * modification, are permitted provided that the following conditions are met: |
universe@7 | 8 | * |
universe@7 | 9 | * 1. Redistributions of source code must retain the above copyright |
universe@7 | 10 | * notice, this list of conditions and the following disclaimer. |
universe@7 | 11 | * |
universe@7 | 12 | * 2. Redistributions in binary form must reproduce the above copyright |
universe@7 | 13 | * notice, this list of conditions and the following disclaimer in the |
universe@7 | 14 | * documentation and/or other materials provided with the distribution. |
universe@7 | 15 | * |
universe@7 | 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
universe@7 | 17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
universe@7 | 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
universe@7 | 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
universe@7 | 20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
universe@7 | 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
universe@7 | 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
universe@7 | 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
universe@7 | 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
universe@7 | 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
universe@7 | 26 | * POSSIBILITY OF SUCH DAMAGE. |
universe@34 | 27 | * |
universe@7 | 28 | */ |
universe@7 | 29 | package de.uapcore.lightpit; |
universe@7 | 30 | |
universe@38 | 31 | import de.uapcore.lightpit.dao.DataAccessObjects; |
universe@38 | 32 | import de.uapcore.lightpit.dao.postgres.PGDataAccessObjects; |
universe@33 | 33 | import org.slf4j.Logger; |
universe@33 | 34 | import org.slf4j.LoggerFactory; |
universe@33 | 35 | |
universe@7 | 36 | import javax.servlet.ServletException; |
universe@7 | 37 | import javax.servlet.http.HttpServlet; |
universe@7 | 38 | import javax.servlet.http.HttpServletRequest; |
universe@7 | 39 | import javax.servlet.http.HttpServletResponse; |
universe@13 | 40 | import javax.servlet.http.HttpSession; |
universe@33 | 41 | import java.io.IOException; |
universe@47 | 42 | import java.lang.reflect.Constructor; |
universe@73 | 43 | import java.lang.reflect.InvocationTargetException; |
universe@33 | 44 | import java.lang.reflect.Method; |
universe@33 | 45 | import java.lang.reflect.Modifier; |
universe@38 | 46 | import java.sql.Connection; |
universe@38 | 47 | import java.sql.SQLException; |
universe@33 | 48 | import java.util.*; |
universe@63 | 49 | import java.util.function.Function; |
universe@7 | 50 | |
universe@7 | 51 | /** |
universe@7 | 52 | * A special implementation of a HTTPServlet which is focused on implementing |
universe@7 | 53 | * the necessary functionality for {@link LightPITModule}s. |
universe@7 | 54 | */ |
universe@9 | 55 | public abstract class AbstractLightPITServlet extends HttpServlet { |
universe@34 | 56 | |
universe@10 | 57 | private static final Logger LOG = LoggerFactory.getLogger(AbstractLightPITServlet.class); |
universe@34 | 58 | |
universe@43 | 59 | private static final String SITE_JSP = Functions.jspPath("site"); |
universe@33 | 60 | |
universe@33 | 61 | |
universe@63 | 62 | @FunctionalInterface |
universe@63 | 63 | protected interface SQLFindFunction<K, T> { |
universe@63 | 64 | T apply(K key) throws SQLException; |
universe@63 | 65 | |
universe@63 | 66 | default <V> SQLFindFunction<V, T> compose(Function<? super V, ? extends K> before) throws SQLException { |
universe@63 | 67 | Objects.requireNonNull(before); |
universe@63 | 68 | return (v) -> this.apply(before.apply(v)); |
universe@63 | 69 | } |
universe@63 | 70 | |
universe@63 | 71 | default <V> SQLFindFunction<K, V> andThen(Function<? super T, ? extends V> after) throws SQLException { |
universe@63 | 72 | Objects.requireNonNull(after); |
universe@63 | 73 | return (t) -> after.apply(this.apply(t)); |
universe@63 | 74 | } |
universe@63 | 75 | |
universe@63 | 76 | static <K> Function<K, K> identity() { |
universe@63 | 77 | return (t) -> t; |
universe@63 | 78 | } |
universe@63 | 79 | } |
universe@63 | 80 | |
universe@10 | 81 | /** |
universe@11 | 82 | * Invocation mapping gathered from the {@link RequestMapping} annotations. |
universe@34 | 83 | * <p> |
universe@18 | 84 | * Paths in this map must always start with a leading slash, although |
universe@18 | 85 | * the specification in the annotation must not start with a leading slash. |
universe@34 | 86 | * <p> |
universe@34 | 87 | * The reason for this is the different handling of empty paths in |
universe@18 | 88 | * {@link HttpServletRequest#getPathInfo()}. |
universe@11 | 89 | */ |
universe@39 | 90 | private final Map<HttpMethod, Map<String, Method>> mappings = new HashMap<>(); |
universe@11 | 91 | |
universe@11 | 92 | /** |
universe@10 | 93 | * Gives implementing modules access to the {@link ModuleManager}. |
universe@33 | 94 | * |
universe@10 | 95 | * @return the module manager |
universe@10 | 96 | */ |
universe@10 | 97 | protected final ModuleManager getModuleManager() { |
universe@10 | 98 | return (ModuleManager) getServletContext().getAttribute(ModuleManager.SC_ATTR_NAME); |
universe@10 | 99 | } |
universe@33 | 100 | |
universe@78 | 101 | /** |
universe@78 | 102 | * Returns the name of the resource bundle associated with this servlet. |
universe@78 | 103 | * @return the resource bundle base name |
universe@78 | 104 | */ |
universe@78 | 105 | protected abstract String getResourceBundleName(); |
universe@78 | 106 | |
universe@38 | 107 | |
universe@34 | 108 | /** |
universe@38 | 109 | * Creates a set of data access objects for the specified connection. |
universe@33 | 110 | * |
universe@38 | 111 | * @param connection the SQL connection |
universe@38 | 112 | * @return a set of data access objects |
universe@17 | 113 | */ |
universe@38 | 114 | private DataAccessObjects createDataAccessObjects(Connection connection) throws SQLException { |
universe@38 | 115 | final var df = (DatabaseFacade) getServletContext().getAttribute(DatabaseFacade.SC_ATTR_NAME); |
universe@39 | 116 | if (df.getSQLDialect() == DatabaseFacade.Dialect.Postgres) { |
universe@39 | 117 | return new PGDataAccessObjects(connection); |
universe@38 | 118 | } |
universe@39 | 119 | throw new AssertionError("Non-exhaustive if-else - this is a bug."); |
universe@17 | 120 | } |
universe@33 | 121 | |
universe@38 | 122 | private ResponseType invokeMapping(Method method, HttpServletRequest req, HttpServletResponse resp, DataAccessObjects dao) throws IOException { |
universe@11 | 123 | try { |
universe@14 | 124 | LOG.trace("invoke {}#{}", method.getDeclaringClass().getName(), method.getName()); |
universe@42 | 125 | final var paramTypes = method.getParameterTypes(); |
universe@42 | 126 | final var paramValues = new Object[paramTypes.length]; |
universe@42 | 127 | for (int i = 0; i < paramTypes.length; i++) { |
universe@42 | 128 | if (paramTypes[i].isAssignableFrom(HttpServletRequest.class)) { |
universe@42 | 129 | paramValues[i] = req; |
universe@42 | 130 | } else if (paramTypes[i].isAssignableFrom(HttpServletResponse.class)) { |
universe@42 | 131 | paramValues[i] = resp; |
universe@42 | 132 | } |
universe@42 | 133 | if (paramTypes[i].isAssignableFrom(DataAccessObjects.class)) { |
universe@42 | 134 | paramValues[i] = dao; |
universe@42 | 135 | } |
universe@42 | 136 | } |
universe@42 | 137 | return (ResponseType) method.invoke(this, paramValues); |
universe@73 | 138 | } catch (InvocationTargetException ex) { |
universe@73 | 139 | LOG.error("invocation of method {}::{} failed: {}", |
universe@73 | 140 | method.getDeclaringClass().getName(), method.getName(), ex.getTargetException().getMessage()); |
universe@73 | 141 | LOG.debug("Details: ", ex.getTargetException()); |
universe@73 | 142 | resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, ex.getTargetException().getMessage()); |
universe@73 | 143 | return ResponseType.NONE; |
universe@12 | 144 | } catch (ReflectiveOperationException | ClassCastException ex) { |
universe@73 | 145 | LOG.error("invocation of method {}::{} failed: {}", |
universe@73 | 146 | method.getDeclaringClass().getName(), method.getName(), ex.getMessage()); |
universe@38 | 147 | LOG.debug("Details: ", ex); |
universe@73 | 148 | resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, ex.getMessage()); |
universe@12 | 149 | return ResponseType.NONE; |
universe@11 | 150 | } |
universe@11 | 151 | } |
universe@11 | 152 | |
universe@11 | 153 | @Override |
universe@11 | 154 | public void init() throws ServletException { |
universe@78 | 155 | scanForRequestMappings(); |
universe@33 | 156 | |
universe@12 | 157 | LOG.trace("{} initialized", getServletName()); |
universe@12 | 158 | } |
universe@12 | 159 | |
universe@12 | 160 | private void scanForRequestMappings() { |
universe@12 | 161 | try { |
universe@11 | 162 | Method[] methods = getClass().getDeclaredMethods(); |
universe@11 | 163 | for (Method method : methods) { |
universe@11 | 164 | Optional<RequestMapping> mapping = Optional.ofNullable(method.getAnnotation(RequestMapping.class)); |
universe@11 | 165 | if (mapping.isPresent()) { |
universe@11 | 166 | if (!Modifier.isPublic(method.getModifiers())) { |
universe@11 | 167 | LOG.warn("{} is annotated with {} but is not public", |
universe@11 | 168 | method.getName(), RequestMapping.class.getSimpleName() |
universe@11 | 169 | ); |
universe@11 | 170 | continue; |
universe@11 | 171 | } |
universe@11 | 172 | if (Modifier.isAbstract(method.getModifiers())) { |
universe@11 | 173 | LOG.warn("{} is annotated with {} but is abstract", |
universe@11 | 174 | method.getName(), RequestMapping.class.getSimpleName() |
universe@11 | 175 | ); |
universe@11 | 176 | continue; |
universe@11 | 177 | } |
universe@12 | 178 | if (!ResponseType.class.isAssignableFrom(method.getReturnType())) { |
universe@12 | 179 | LOG.warn("{} is annotated with {} but has the wrong return type - 'ResponseType' required", |
universe@12 | 180 | method.getName(), RequestMapping.class.getSimpleName() |
universe@12 | 181 | ); |
universe@12 | 182 | continue; |
universe@12 | 183 | } |
universe@12 | 184 | |
universe@42 | 185 | boolean paramsInjectible = true; |
universe@42 | 186 | for (var param : method.getParameterTypes()) { |
universe@42 | 187 | paramsInjectible &= HttpServletRequest.class.isAssignableFrom(param) |
universe@42 | 188 | || HttpServletResponse.class.isAssignableFrom(param) |
universe@42 | 189 | || DataAccessObjects.class.isAssignableFrom(param); |
universe@42 | 190 | } |
universe@42 | 191 | if (paramsInjectible) { |
universe@58 | 192 | String requestPath = "/" + mapping.get().requestPath(); |
universe@12 | 193 | |
universe@39 | 194 | if (mappings |
universe@39 | 195 | .computeIfAbsent(mapping.get().method(), k -> new HashMap<>()) |
universe@39 | 196 | .putIfAbsent(requestPath, method) != null) { |
universe@11 | 197 | LOG.warn("{} {} has multiple mappings", |
universe@11 | 198 | mapping.get().method(), |
universe@11 | 199 | mapping.get().requestPath() |
universe@11 | 200 | ); |
universe@11 | 201 | } |
universe@12 | 202 | |
universe@22 | 203 | LOG.debug("{} {} maps to {}::{}", |
universe@11 | 204 | mapping.get().method(), |
universe@18 | 205 | requestPath, |
universe@22 | 206 | getClass().getSimpleName(), |
universe@11 | 207 | method.getName() |
universe@11 | 208 | ); |
universe@11 | 209 | } else { |
universe@42 | 210 | LOG.warn("{} is annotated with {} but has the wrong parameters - only HttpServletRequest. HttpServletResponse, and DataAccessObjects are allowed", |
universe@11 | 211 | method.getName(), RequestMapping.class.getSimpleName() |
universe@11 | 212 | ); |
universe@11 | 213 | } |
universe@11 | 214 | } |
universe@11 | 215 | } |
universe@12 | 216 | } catch (SecurityException ex) { |
universe@12 | 217 | LOG.error("Scan for request mappings on declared methods failed.", ex); |
universe@11 | 218 | } |
universe@11 | 219 | } |
universe@11 | 220 | |
universe@11 | 221 | @Override |
universe@11 | 222 | public void destroy() { |
universe@11 | 223 | mappings.clear(); |
universe@11 | 224 | LOG.trace("{} destroyed", getServletName()); |
universe@11 | 225 | } |
universe@34 | 226 | |
universe@13 | 227 | /** |
universe@74 | 228 | * Sets the name of the content page. |
universe@34 | 229 | * <p> |
universe@13 | 230 | * It is sufficient to specify the name without any extension. The extension |
universe@13 | 231 | * is added automatically if not specified. |
universe@34 | 232 | * |
universe@74 | 233 | * @param req the servlet request object |
universe@74 | 234 | * @param pageName the name of the content page |
universe@74 | 235 | * @see Constants#REQ_ATTR_CONTENT_PAGE |
universe@13 | 236 | */ |
universe@74 | 237 | protected void setContentPage(HttpServletRequest req, String pageName) { |
universe@74 | 238 | req.setAttribute(Constants.REQ_ATTR_CONTENT_PAGE, Functions.jspPath(pageName)); |
universe@13 | 239 | } |
universe@34 | 240 | |
universe@11 | 241 | /** |
universe@71 | 242 | * Sets the breadcrumbs menu. |
universe@71 | 243 | * |
universe@71 | 244 | * @param req the servlet request object |
universe@71 | 245 | * @param breadcrumbs the menu entries for the breadcrumbs menu |
universe@71 | 246 | * @see Constants#REQ_ATTR_BREADCRUMBS |
universe@71 | 247 | */ |
universe@71 | 248 | protected void setBreadcrumbs(HttpServletRequest req, List<MenuEntry> breadcrumbs) { |
universe@71 | 249 | req.setAttribute(Constants.REQ_ATTR_BREADCRUMBS, breadcrumbs); |
universe@71 | 250 | } |
universe@71 | 251 | |
universe@71 | 252 | /** |
universe@47 | 253 | * @param req the servlet request object |
universe@47 | 254 | * @param location the location where to redirect |
universe@47 | 255 | * @see Constants#REQ_ATTR_REDIRECT_LOCATION |
universe@47 | 256 | */ |
universe@63 | 257 | protected void setRedirectLocation(HttpServletRequest req, String location) { |
universe@47 | 258 | if (location.startsWith("./")) { |
universe@47 | 259 | location = location.replaceFirst("\\./", Functions.baseHref(req)); |
universe@47 | 260 | } |
universe@47 | 261 | req.setAttribute(Constants.REQ_ATTR_REDIRECT_LOCATION, location); |
universe@47 | 262 | } |
universe@47 | 263 | |
universe@47 | 264 | /** |
universe@13 | 265 | * Specifies the name of an additional stylesheet used by the module. |
universe@34 | 266 | * <p> |
universe@13 | 267 | * Setting an additional stylesheet is optional, but quite common for HTML |
universe@13 | 268 | * output. |
universe@34 | 269 | * <p> |
universe@13 | 270 | * It is sufficient to specify the name without any extension. The extension |
universe@13 | 271 | * is added automatically if not specified. |
universe@34 | 272 | * |
universe@34 | 273 | * @param req the servlet request object |
universe@13 | 274 | * @param stylesheet the name of the stylesheet |
universe@11 | 275 | */ |
universe@13 | 276 | public void setStylesheet(HttpServletRequest req, String stylesheet) { |
universe@13 | 277 | req.setAttribute(Constants.REQ_ATTR_STYLESHEET, Functions.enforceExt(stylesheet, ".css")); |
universe@10 | 278 | } |
universe@34 | 279 | |
universe@47 | 280 | /** |
universe@47 | 281 | * Obtains a request parameter of the specified type. |
universe@47 | 282 | * The specified type must have a single-argument constructor accepting a string to perform conversion. |
universe@47 | 283 | * The constructor of the specified type may throw an exception on conversion failures. |
universe@47 | 284 | * |
universe@71 | 285 | * @param req the servlet request object |
universe@47 | 286 | * @param clazz the class object of the expected type |
universe@71 | 287 | * @param name the name of the parameter |
universe@71 | 288 | * @param <T> the expected type |
universe@47 | 289 | * @return the parameter value or an empty optional, if no parameter with the specified name was found |
universe@47 | 290 | */ |
universe@71 | 291 | protected <T> Optional<T> getParameter(HttpServletRequest req, Class<T> clazz, String name) { |
universe@47 | 292 | final String paramValue = req.getParameter(name); |
universe@47 | 293 | if (paramValue == null) return Optional.empty(); |
universe@71 | 294 | if (clazz.equals(String.class)) return Optional.of((T) paramValue); |
universe@75 | 295 | if (java.sql.Date.class.isAssignableFrom(clazz)) { |
universe@75 | 296 | try { |
universe@75 | 297 | return Optional.of((T)java.sql.Date.valueOf(paramValue)); |
universe@75 | 298 | } catch (IllegalArgumentException ex) { |
universe@75 | 299 | return Optional.empty(); |
universe@75 | 300 | } |
universe@75 | 301 | } |
universe@47 | 302 | try { |
universe@47 | 303 | final Constructor<T> ctor = clazz.getConstructor(String.class); |
universe@47 | 304 | return Optional.of(ctor.newInstance(paramValue)); |
universe@47 | 305 | } catch (ReflectiveOperationException e) { |
universe@47 | 306 | throw new RuntimeException(e); |
universe@47 | 307 | } |
universe@47 | 308 | |
universe@47 | 309 | } |
universe@47 | 310 | |
universe@63 | 311 | /** |
universe@63 | 312 | * Tries to look up an entity with a key obtained from a request parameter. |
universe@63 | 313 | * |
universe@71 | 314 | * @param req the servlet request object |
universe@63 | 315 | * @param clazz the class representing the type of the request parameter |
universe@71 | 316 | * @param name the name of the request parameter |
universe@71 | 317 | * @param find the find function (typically a DAO function) |
universe@71 | 318 | * @param <T> the type of the request parameter |
universe@71 | 319 | * @param <R> the type of the looked up entity |
universe@63 | 320 | * @return the retrieved entity or an empty optional if there is no such entity or the request parameter was missing |
universe@63 | 321 | * @throws SQLException if the find function throws an exception |
universe@63 | 322 | */ |
universe@71 | 323 | protected <T, R> Optional<R> findByParameter(HttpServletRequest req, Class<T> clazz, String name, SQLFindFunction<? super T, ? extends R> find) throws SQLException { |
universe@63 | 324 | final var param = getParameter(req, clazz, name); |
universe@63 | 325 | if (param.isPresent()) { |
universe@63 | 326 | return Optional.ofNullable(find.apply(param.get())); |
universe@63 | 327 | } else { |
universe@63 | 328 | return Optional.empty(); |
universe@63 | 329 | } |
universe@63 | 330 | } |
universe@63 | 331 | |
universe@10 | 332 | private void forwardToFullView(HttpServletRequest req, HttpServletResponse resp) |
universe@10 | 333 | throws IOException, ServletException { |
universe@34 | 334 | |
universe@71 | 335 | final var mainMenu = new ArrayList<MenuEntry>(getModuleManager().getMainMenu()); |
universe@71 | 336 | for (var entry : mainMenu) { |
universe@71 | 337 | if (Functions.fullPath(req).startsWith("/" + entry.getPathName())) { |
universe@71 | 338 | entry.setActive(true); |
universe@71 | 339 | } |
universe@71 | 340 | } |
universe@71 | 341 | req.setAttribute(Constants.REQ_ATTR_MENU, mainMenu); |
universe@43 | 342 | req.getRequestDispatcher(SITE_JSP).forward(req, resp); |
universe@10 | 343 | } |
universe@34 | 344 | |
universe@45 | 345 | private String sanitizeRequestPath(HttpServletRequest req) { |
universe@45 | 346 | return Optional.ofNullable(req.getPathInfo()).orElse("/"); |
universe@45 | 347 | } |
universe@45 | 348 | |
universe@39 | 349 | private Optional<Method> findMapping(HttpMethod method, HttpServletRequest req) { |
universe@45 | 350 | return Optional.ofNullable(mappings.get(method)).map(rm -> rm.get(sanitizeRequestPath(req))); |
universe@11 | 351 | } |
universe@34 | 352 | |
universe@34 | 353 | private void forwardAsSpecified(ResponseType type, HttpServletRequest req, HttpServletResponse resp) |
universe@12 | 354 | throws ServletException, IOException { |
universe@12 | 355 | switch (type) { |
universe@34 | 356 | case NONE: |
universe@34 | 357 | return; |
universe@43 | 358 | case HTML: |
universe@12 | 359 | forwardToFullView(req, resp); |
universe@12 | 360 | return; |
universe@12 | 361 | // TODO: implement remaining response types |
universe@12 | 362 | default: |
universe@34 | 363 | throw new AssertionError("ResponseType switch is not exhaustive - this is a bug!"); |
universe@12 | 364 | } |
universe@12 | 365 | } |
universe@34 | 366 | |
universe@38 | 367 | private void doProcess(HttpMethod method, HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { |
universe@27 | 368 | |
universe@13 | 369 | // choose the requested language as session language (if available) or fall back to english, otherwise |
universe@20 | 370 | HttpSession session = req.getSession(); |
universe@13 | 371 | if (session.getAttribute(Constants.SESSION_ATTR_LANGUAGE) == null) { |
universe@13 | 372 | Optional<List<String>> availableLanguages = Functions.availableLanguages(getServletContext()).map(Arrays::asList); |
universe@13 | 373 | Optional<Locale> reqLocale = Optional.of(req.getLocale()); |
universe@13 | 374 | Locale sessionLocale = reqLocale.filter((rl) -> availableLanguages.map((al) -> al.contains(rl.getLanguage())).orElse(false)).orElse(Locale.ENGLISH); |
universe@13 | 375 | session.setAttribute(Constants.SESSION_ATTR_LANGUAGE, sessionLocale); |
universe@34 | 376 | LOG.debug("Setting language for new session {}: {}", session.getId(), sessionLocale.getDisplayLanguage()); |
universe@14 | 377 | } else { |
universe@15 | 378 | Locale sessionLocale = (Locale) session.getAttribute(Constants.SESSION_ATTR_LANGUAGE); |
universe@15 | 379 | resp.setLocale(sessionLocale); |
universe@15 | 380 | LOG.trace("Continuing session {} with language {}", session.getId(), sessionLocale); |
universe@13 | 381 | } |
universe@34 | 382 | |
universe@21 | 383 | // set some internal request attributes |
universe@53 | 384 | final String fullPath = Functions.fullPath(req); |
universe@47 | 385 | req.setAttribute(Constants.REQ_ATTR_BASE_HREF, Functions.baseHref(req)); |
universe@53 | 386 | req.setAttribute(Constants.REQ_ATTR_PATH, fullPath); |
universe@78 | 387 | req.setAttribute(Constants.REQ_ATTR_RESOURCE_BUNDLE, getResourceBundleName()); |
universe@34 | 388 | |
universe@53 | 389 | // if this is an error path, bypass the normal flow |
universe@53 | 390 | if (fullPath.startsWith("/error/")) { |
universe@53 | 391 | final var mapping = findMapping(method, req); |
universe@53 | 392 | if (mapping.isPresent()) { |
universe@53 | 393 | forwardAsSpecified(invokeMapping(mapping.get(), req, resp, null), req, resp); |
universe@53 | 394 | } |
universe@53 | 395 | return; |
universe@53 | 396 | } |
universe@53 | 397 | |
universe@38 | 398 | // obtain a connection and create the data access objects |
universe@38 | 399 | final var db = (DatabaseFacade) req.getServletContext().getAttribute(DatabaseFacade.SC_ATTR_NAME); |
universe@53 | 400 | final var ds = db.getDataSource(); |
universe@53 | 401 | if (ds == null) { |
universe@53 | 402 | resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE, "JNDI DataSource lookup failed. See log for details."); |
universe@53 | 403 | return; |
universe@53 | 404 | } |
universe@53 | 405 | try (final var connection = ds.getConnection()) { |
universe@38 | 406 | final var dao = createDataAccessObjects(connection); |
universe@39 | 407 | try { |
universe@39 | 408 | connection.setAutoCommit(false); |
universe@39 | 409 | // call the handler, if available, or send an HTTP 404 error |
universe@39 | 410 | final var mapping = findMapping(method, req); |
universe@39 | 411 | if (mapping.isPresent()) { |
universe@39 | 412 | forwardAsSpecified(invokeMapping(mapping.get(), req, resp, dao), req, resp); |
universe@39 | 413 | } else { |
universe@39 | 414 | resp.sendError(HttpServletResponse.SC_NOT_FOUND); |
universe@39 | 415 | } |
universe@39 | 416 | connection.commit(); |
universe@39 | 417 | } catch (SQLException ex) { |
universe@39 | 418 | LOG.warn("Database transaction failed (Code {}): {}", ex.getErrorCode(), ex.getMessage()); |
universe@39 | 419 | LOG.debug("Details: ", ex); |
universe@54 | 420 | resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Unhandled Transaction Error - Code: " + ex.getErrorCode()); |
universe@39 | 421 | connection.rollback(); |
universe@38 | 422 | } |
universe@38 | 423 | } catch (SQLException ex) { |
universe@39 | 424 | LOG.error("Severe Database Exception (Code {}): {}", ex.getErrorCode(), ex.getMessage()); |
universe@38 | 425 | LOG.debug("Details: ", ex); |
universe@54 | 426 | resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Database Error - Code: " + ex.getErrorCode()); |
universe@12 | 427 | } |
universe@12 | 428 | } |
universe@34 | 429 | |
universe@7 | 430 | @Override |
universe@7 | 431 | protected final void doGet(HttpServletRequest req, HttpServletResponse resp) |
universe@7 | 432 | throws ServletException, IOException { |
universe@12 | 433 | doProcess(HttpMethod.GET, req, resp); |
universe@7 | 434 | } |
universe@7 | 435 | |
universe@7 | 436 | @Override |
universe@7 | 437 | protected final void doPost(HttpServletRequest req, HttpServletResponse resp) |
universe@7 | 438 | throws ServletException, IOException { |
universe@12 | 439 | doProcess(HttpMethod.POST, req, resp); |
universe@7 | 440 | } |
universe@7 | 441 | } |