Java ContextLoader類代碼示例

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * Reads lang_xx.properties into field {@link #langs langs}.
 */
public void readLangs() {
	final ServletContext servletContext = ContextLoader.getCurrentWebApplicationContext().getServletContext();

	final Set<String> resourcePaths = servletContext.getResourcePaths("/plugins/" + dirName);

	for (final String resourcePath : resourcePaths) {
		if (resourcePath.contains("lang_") && resourcePath.endsWith(".properties")) {
			final String langFileName = StringUtils.substringAfter(resourcePath, "/plugins/" + dirName + "/");

			final String key = langFileName.substring("lang_".length(), langFileName.lastIndexOf("."));
			final Properties props = new Properties();

			try {
				final File file = Latkes.getWebFile(resourcePath);

				props.load(new FileInputStream(file));

				langs.put(key.toLowerCase(), props);
			} catch (final Exception e) {
				logger.error("Get plugin[name=" + name + "]'s language configuration failed", e);
			}
		}
	}
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * Gets all skin directory names. Scans the /skins/ directory, using the
 * subdirectory of it as the skin directory name, for example,
 * 
 * <pre>
 * ${Web root}/skins/
 *     <b>default</b>/
 *     <b>mobile</b>/
 *     <b>classic</b>/
 * </pre>
 * 
 * .
 *
 * @return a set of skin name, returns an empty set if not found
 */
public static Set<String> getSkinDirNames() {
	final ServletContext servletContext = ContextLoader.getCurrentWebApplicationContext().getServletContext();

	final Set<String> ret = new HashSet<>();
	final Set<String> resourcePaths = servletContext.getResourcePaths("/skins");

	for (final String path : resourcePaths) {
		final String dirName = path.substring("/skins".length() + 1, path.length() - 1);

		if (dirName.startsWith(".")) {
			continue;
		}

		ret.add(dirName);
	}

	return ret;
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * Process {@code @Autowired} injection for the given target object,
 * based on the current web application context.
 * <p>Intended for use as a delegate.
 * @param target the target object to process
 * @see org.springframework.web.context.ContextLoader#getCurrentWebApplicationContext()
 */
public static void processInjectionBasedOnCurrentContext(Object target) {
	Assert.notNull(target, "Target object must not be null");
	WebApplicationContext cc = ContextLoader.getCurrentWebApplicationContext();
	if (cc != null) {
		AutowiredAnnotationBeanPostProcessor bpp = new AutowiredAnnotationBeanPostProcessor();
		bpp.setBeanFactory(cc.getAutowireCapableBeanFactory());
		bpp.processInjection(target);
	}
	else {
		if (logger.isDebugEnabled()) {
			logger.debug("Current WebApplicationContext is not available for processing of " +
					ClassUtils.getShortName(target.getClass()) + ": " +
					"Make sure this class gets constructed in a Spring web application. Proceeding without injection.");
		}
	}
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * If a contextConfigLocation init-param has been specified for the ContextLoaderListener,
 * then it should take precedence. This is generally not a recommended practice, but
 * when it does happen, the init-param should be considered more specific than the
 * programmatic configuration, given that it still quite possibly externalized in
 * hybrid web.xml + WebApplicationInitializer cases.
 */
@Test
public void abstractRefreshableWAC_respectsInitParam_overProgrammaticConfigLocations() {
	XmlWebApplicationContext ctx = new XmlWebApplicationContext();
	ctx.setConfigLocation("programmatic.xml");
	ContextLoaderListener cll = new ContextLoaderListener(ctx);

	MockServletContext sc = new MockServletContext();
	sc.addInitParameter(ContextLoader.CONFIG_LOCATION_PARAM, "from-init-param.xml");

	try {
		cll.contextInitialized(new ServletContextEvent(sc));
		fail("expected exception");
	} catch (Throwable t) {
		// assert that an attempt was made to load the correct XML
		assertTrue(t.getMessage(), t.getMessage().endsWith(
				"Could not open ServletContext resource [/from-init-param.xml]"));
	}
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * If setConfigLocation has not been called explicitly against the application context,
 * then fall back to the ContextLoaderListener init-param if present.
 */
@Test
public void abstractRefreshableWAC_fallsBackToInitParam() {
	XmlWebApplicationContext ctx = new XmlWebApplicationContext();
	//ctx.setConfigLocation("programmatic.xml"); // nothing set programmatically
	ContextLoaderListener cll = new ContextLoaderListener(ctx);

	MockServletContext sc = new MockServletContext();
	sc.addInitParameter(ContextLoader.CONFIG_LOCATION_PARAM, "from-init-param.xml");

	try {
		cll.contextInitialized(new ServletContextEvent(sc));
		fail("expected exception");
	} catch (Throwable t) {
		// assert that an attempt was made to load the correct XML
		assertTrue(t.getMessage().endsWith(
				"Could not open ServletContext resource [/from-init-param.xml]"));
	}
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * Ensure that any custom default locations are still respected.
 */
@Test
public void customAbstractRefreshableWAC_fallsBackToInitParam() {
	XmlWebApplicationContext ctx = new XmlWebApplicationContext() {
		@Override
		protected String[] getDefaultConfigLocations() {
			return new String[] { "/WEB-INF/custom.xml" };
		}
	};
	//ctx.setConfigLocation("programmatic.xml"); // nothing set programmatically
	ContextLoaderListener cll = new ContextLoaderListener(ctx);

	MockServletContext sc = new MockServletContext();
	sc.addInitParameter(ContextLoader.CONFIG_LOCATION_PARAM, "from-init-param.xml");

	try {
		cll.contextInitialized(new ServletContextEvent(sc));
		fail("expected exception");
	} catch (Throwable t) {
		// assert that an attempt was made to load the correct XML
		System.out.println(t.getMessage());
		assertTrue(t.getMessage().endsWith(
				"Could not open ServletContext resource [/from-init-param.xml]"));
	}
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 *  銷毀一個消費端 
 *  
 *     該方法  會通過傳遞的   ConsumerID 從 servletContext 查詢 是否有 該對象 
 *     然後調用 其銷毀方法 
 * 
 * @param ConsumerID    消費者唯一標識   
 * @return   
 */
@RequestMapping(method = RequestMethod.DELETE)
public ResponseEntity<String> destroyMqConsumer(@RequestParam("Consumer") String Consumer)
{

	ServletContext servletContext = ContextLoader.getCurrentWebApplicationContext()
			.getServletContext();
	@SuppressWarnings("unchecked")
	Enumeration<String> attributeNames = servletContext.getAttributeNames();

	List<String> outList = new ArrayList<String>();

	Object AttributeConsumer = servletContext.getAttribute(Consumer);
	if (AttributeConsumer != null)
	{
		MqConsumer mqConsumer = (MqConsumer) AttributeConsumer;
		mqConsumer.destroy();
		servletContext.setAttribute(Consumer, null);

		return ResponseEntity.status(HttpStatus.OK).body(Consumer + " 消費者銷毀成功");
	}

	return ResponseEntity.status(HttpStatus.NOT_FOUND).body(Consumer + " 未找到   該消費者 ");
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * 獲取servletContext 中存放的 所有  消費者對象 唯一標識 
 * 
 * @return  返回  說有消費者唯一標識  
 * 
 */
@RequestMapping(method = RequestMethod.GET)
public List<AttributeNames> queryMqConsumerList()
{
	ServletContext servletContext = ContextLoader.getCurrentWebApplicationContext()
			.getServletContext();

	List<AttributeNames> list = new ArrayList<AttributeNames>();
	Enumeration<String> attributeNames = servletContext.getAttributeNames();
	while (attributeNames.hasMoreElements())
	{
		String nameString = (String) attributeNames.nextElement();
		if (nameString.contains("@"))
		{
			AttributeNames attri = new AttributeNames();
			attri.setKid(nameString);
			list.add(attri);
		}
	}
	return list;
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
@Test
public void loginOnDemandSynchTenantAlpha()
{
    AuthenticationUtil.setFullyAuthenticatedUser("admin");
    this.createAndEnableTenant("tenantalpha");

    final WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext();
    final PersonService personService = context.getBean("PersonService", PersonService.class);
    TenantUtil.runAsTenant(() -> {
        Assert.assertFalse("User [email protected] should not have been synchronized yet",
                personService.personExists("[email protected]"));
        return null;
    }, "tenantalpha");
    AuthenticationUtil.clearCurrentSecurityContext();

    final AuthenticationService authenticationService = context.getBean("AuthenticationService", AuthenticationService.class);
    authenticationService.authenticate("[email protected]", "afaust".toCharArray());
    this.checkUserExistsAndState("[email protected]", "Axel", "Faust", false);
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
@Test
public void loginNoSyncTenantBeta()
{
    AuthenticationUtil.setFullyAuthenticatedUser("admin");
    this.createAndEnableTenant("tenantbeta");

    final WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext();
    final PersonService personService = context.getBean("PersonService", PersonService.class);
    TenantUtil.runAsTenant(() -> {
        Assert.assertFalse("User [email protected] should not have been created yet", personService.personExists("[email protected]"));
        return null;
    }, "tenantbeta");
    AuthenticationUtil.clearCurrentSecurityContext();

    final AuthenticationService authenticationService = context.getBean("AuthenticationService", AuthenticationService.class);

    authenticationService.authenticate("[email protected]", "afaust".toCharArray());
    this.checkUserExistsAndState("[email protected]", "afaust", "", false);

    Assert.assertFalse("User [email protected] should not have been eagerly synchronized",
            personService.personExists("[email protected]"));
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
protected void createAndEnableTenant(final String tenantName)
{
    final WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext();
    final TenantAdminService tenantAdminService = context.getBean("TenantAdminService", TenantAdminService.class);

    if (!tenantAdminService.existsTenant(tenantName))
    {
        tenantAdminService.createTenant(tenantName, "admin".toCharArray());
        // eager sync requires "normal" enabling - won't on creation by design
        tenantAdminService.disableTenant(tenantName);
    }
    if (!tenantAdminService.isEnabledTenant(tenantName))
    {
        tenantAdminService.enableTenant(tenantName);
    }
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
@Override
public void contextInitialized(ServletContextEvent sce) {
    ServletContext sc = sce.getServletContext();

    // 初始化 Logback
    sc.setInitParameter(WebLogbackConfigurer.CONFIG_LOCATION_PARAM, findLogbackConfigLocation());
    WebLogbackConfigurer.initLogging(sc);

    // 初始化 Spring 配置
    sc.setInitParameter(ContextLoader.CONFIG_LOCATION_PARAM, "classpath:spring-setaria-console.xml");
    applicationContext = initWebApplicationContext(sc);

    // 注冊 Spring Character Encoding
    registerCharacterEncoding(sc);

    // 注冊 Spring Servlet
    registerDispatcherServlet(sc);

    // 注冊 Spring FreeMarker Servlet 處理 FTL 請求
    registerSpringFreeMarkerServlet(sc);
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
@Override
public void onStartup(ServletContext webappContext) throws ServletException {
	
	ModuleDataExtractor extractor = new ModuleDataExtractor(module);
	environment.assureModule(module);
	String fullRestResource = "/" + module.getContext() + "/*";

	ServerData serverData = new ServerData(environment.getModuleBean(module).getPort(), 
			Arrays.asList(),
			rootContext, fullRestResource, module);
	List<FilterData> filterDataList = extractor.createFilteredDataList(serverData);
	List<ServletData> servletDataList = extractor.createServletDataList(serverData);
	new ServletConfigurer(serverData, LinkedListX.fromIterable(servletDataList)).addServlets(webappContext);

	new FilterConfigurer(serverData, LinkedListX.fromIterable(filterDataList)).addFilters(webappContext);
	PersistentList<ServletContextListener> servletContextListenerData = LinkedListX.fromIterable(module.getListeners(serverData)).filter(i->!(i instanceof ContextLoader));
    PersistentList<ServletRequestListener> servletRequestListenerData =	LinkedListX.fromIterable(module.getRequestListeners(serverData));
	
	new ServletContextListenerConfigurer(serverData, servletContextListenerData, servletRequestListenerData).addListeners(webappContext);
	
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
/**
 * Instantiate the rootId WebApplicationContext for this loader, either the
 * default context class or a custom context class if specified.
 * <p>This implementation expects custom contexts to implement the
 * {@link ConfigurableWebApplicationContext} interface.
 * Can be overridden in subclasses.
 * <p>In addition, {@link #customizeContext} gets called prior to refreshing the
 * context, allowing subclasses to perform custom modifications to the context.
 * @param servletContext current servlet context
 * @param parent the parent ApplicationContext to use, or <code>null</code> if none
 * @return the rootId WebApplicationContext
 * @throws BeansException if the context couldn't be initialized
 * @see ConfigurableWebApplicationContext
 */
@Override
@Deprecated
protected WebApplicationContext createWebApplicationContext(ServletContext servletContext, ApplicationContext parent) throws BeansException {
    MergeXmlWebApplicationContext wac = new MergeXmlWebApplicationContext();
    wac.setParent(parent);
    wac.setServletContext(servletContext);
    wac.setConfigLocation(servletContext.getInitParameter(ContextLoader.CONFIG_LOCATION_PARAM));
    wac.setPatchLocation(servletContext.getInitParameter(PATCH_LOCATION_PARAM));
    wac.setShutdownBean(servletContext.getInitParameter(SHUTDOWN_HOOK_BEAN));
    wac.setShutdownMethod(servletContext.getInitParameter(SHUTDOWN_HOOK_METHOD));
    customizeContext(servletContext, wac);
    wac.refresh();

    return wac;
}
 

import org.springframework.web.context.ContextLoader; //導入依賴的package包/類
@Override
public void contextInitialized(ServletContextEvent sce) {
    try {
        AbstractRefreshableWebApplicationContext wac = (AbstractRefreshableWebApplicationContext) WebApplicationContextUtils
                .getWebApplicationContext(sce.getServletContext());
        if (wac == null) {
            contextLoader = new ContextLoader();
            createSpringApplicationContext(sce.getServletContext());
        } else {
            WebApplicationContextHolder.set(wac);
            enhanceExistingSpringWebApplicationContext(sce, wac);
        }
    } catch (Exception t) {
        LOGGER.error("Exception occured", t);
    }
}