Examples of org.springframework.web.context.ContextLoader

org.springframework.web.context.ContextLoader
Performs the actual initialization work for the root application context. Called by {@link ContextLoaderListener}.
Looks for a {@link #CONTEXT_CLASS_PARAM "contextClass"} parameterat the web.xml context-param level to specify the context class type, falling back to the default of {@link org.springframework.web.context.support.XmlWebApplicationContext}if not found. With the default ContextLoader implementation, any context class specified needs to implement the ConfigurableWebApplicationContext interface.
Processes a {@link #CONFIG_LOCATION_PARAM "contextConfigLocation"}context-param and passes its value to the context instance, parsing it into potentially multiple file paths which can be separated by any number of commas and spaces, e.g. "WEB-INF/applicationContext1.xml, WEB-INF/applicationContext2.xml". Ant-style path patterns are supported as well, e.g. "WEB-INF/*Context.xml,WEB-INF/spring*.xml" or "WEB-INF/**/*Context.xml". If not explicitly specified, the context implementation is supposed to use a default location (with XmlWebApplicationContext: "/WEB-INF/applicationContext.xml").
Note: In case of multiple config locations, later bean definitions will override ones defined in previously loaded files, at least when using one of Spring's default ApplicationContext implementations. This can be leveraged to deliberately override certain bean definitions via an extra XML file.
Above and beyond loading the root application context, this class can optionally load or obtain and hook up a shared parent context to the root application context. See the {@link #loadParentContext(ServletContext)} method for more information.
As of Spring 3.1, {@code ContextLoader} supports injecting the root webapplication context via the {@link #ContextLoader(WebApplicationContext)}constructor, allowing for programmatic configuration in Servlet 3.0+ environments. See {@link org.springframework.web.WebApplicationInitializer} for usage examples. @author Juergen Hoeller @author Colin Sampaleanu @author Sam Brannen @since 17.02.2003 @see ContextLoaderListener @see ConfigurableWebApplicationContext @see org.springframework.web.context.support.XmlWebApplicationContext

    protected MockServletContext servletContext;


    @Override
    protected void setUp() throws Exception {
        super.setUp();
        ContextLoader contextLoader = new ContextLoader();
        servletContext = new MockServletContext();
        servletContext.addInitParameter(ContextLoader.CONFIG_LOCATION_PARAM,
                                        getApplicationContextPath());
        applicationContext = contextLoader.initWebApplicationContext(servletContext);
    }

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    // get the sub contexts - servlet context
    ServletContext ctx = servletContext.getContext(webAppKey);
    if (ctx == null) {
      ctx = servletContext;
    }
    ContextLoader loader = new ContextLoader();
    ConfigurableWebApplicationContext appCtx = (ConfigurableWebApplicationContext) loader.initWebApplicationContext(ctx);
    appCtx.setParent(applicationContext);
    appCtx.refresh();


    ctx.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, appCtx);

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    this.servletContext = new MockServletContext();


    this.webAppContext = new AnnotationConfigWebApplicationContext();
    this.webAppContext.register(Config.class);


    this.contextLoader = new ContextLoader(this.webAppContext);
    this.contextLoader.initWebApplicationContext(this.servletContext);


    this.configurator = new SpringConfigurator();
  }

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  public void updateTargetUrlWithContextLoader() throws Exception {
    StaticWebApplicationContext wac = new StaticWebApplicationContext();
    wac.registerSingleton("requestDataValueProcessor", RequestDataValueProcessorWrapper.class);


    MockServletContext servletContext = new MockServletContext();
    ContextLoader contextLoader = new ContextLoader(wac);
    contextLoader.initWebApplicationContext(servletContext);


    try {
      RequestDataValueProcessor mockProcessor = mock(RequestDataValueProcessor.class);
      wac.getBean(RequestDataValueProcessorWrapper.class).setRequestDataValueProcessor(mockProcessor);


      RedirectView rv = new RedirectView();
      rv.setUrl("/path");


      MockHttpServletRequest request = createRequest();
      HttpServletResponse response = new MockHttpServletResponse();


      given(mockProcessor.processUrl(request, "/path")).willReturn("/path?key=123");


      rv.render(new ModelMap(), request, response);


      verify(mockProcessor).processUrl(request, "/path");
    }
    finally {
      contextLoader.closeWebApplicationContext(servletContext);
    }
  }

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    // get the sub contexts - servlet context
    ServletContext ctx = servletContext.getContext(webAppKey);
    if (ctx == null) {
      ctx = servletContext;
    }
    ContextLoader loader = new ContextLoader();
    ConfigurableWebApplicationContext appCtx = (ConfigurableWebApplicationContext) loader
        .initWebApplicationContext(ctx);
    appCtx.setParent(applicationContext);
    appCtx.refresh();


    ctx.setAttribute(

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    logger.info("Root context loader");
    logger.debug("Path: " + prefix);


    try {
      // instance the context loader
      ContextLoader loader = createContextLoader();
      applicationContext = (ConfigurableWebApplicationContext) loader
          .initWebApplicationContext(servletContext);
      logger.debug("Root context path: "
          + applicationContext.getServletContext().getContextPath());


      ConfigurableBeanFactory factory = applicationContext

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    if (registeredContexts.contains(ctx)) {
      logger.debug("Context is already registered: " + webAppKey);
      return;
    }


    ContextLoader loader = new ContextLoader();


    ConfigurableWebApplicationContext appCtx = (ConfigurableWebApplicationContext) loader
        .initWebApplicationContext(ctx);
    appCtx.setParent(applicationContext);
    appCtx.refresh();


    ctx.setAttribute(

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   * @param configLocations application context文件路径列表.
   */
  public static void initWebApplicationContext(MockServletContext servletContext, String... configLocations) {
    String configLocationsString = StringUtils.join(configLocations, ",");
    servletContext.addInitParameter(ContextLoader.CONFIG_LOCATION_PARAM, configLocationsString);
    new ContextLoader().initWebApplicationContext(servletContext);
  }

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  /**
   * 关闭ServletContext中的Spring WebApplicationContext.
   */
  public static void closeWebApplicationContext(MockServletContext servletContext) {
    new ContextLoader().closeWebApplicationContext(servletContext);
  }

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  @Override
  public ApplicationContext loadContext(String... locations) throws Exception {
    MockServletContext sc = new MockServletContext();
    sc.addInitParameter(ContextLoader.CONFIG_LOCATION_PARAM,
        concatLocations(locations));
    ContextLoader contextLoader = new ContextLoader();
    return contextLoader.initWebApplicationContext(sc);
  }

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