Question

我正在开发一个'用户设置portlet'，用户可以在其中实现多个其他portlet的搜索行为。我想做的方式是通过共享bean。所有portlet都处于不同的战争中，我宁愿避免在一只耳朵中使用所有战争并使用父应用程序上下文，因此可以自主地部署portlet，但是在找到有关如何的任何信息方面没有太多运气做到这一点。

我跟着this blog post试图在其中部署一个带有战争的耳朵文件，但经过几个小时的摔跤后，我已经没有接近解决我的问题......

目录结构如下所示：

portlets
|--- ear
|    \--- src/main/application/META-INF/application.xml
|
|--- jar (contains UserSettings.java)
|    \--- src/main/resources/beanRefContext.xml
|    \--- src/main/resources/services-context.xml
|    \--- src/main/java/com/foo/application/UserSettings.java
|
|--- messagehistory (war, portlet 1)
|    \--- [...]
|
|--- settings (war, portlet 2)
|   \--- [...]
|
\--- pom.xml

我已尝试设置scope="session"，如下所示：

<bean id="userSettings" class="com.foo.application.UserSettings" scope="session">
    <aop:scoped-proxy />
</bean>

但是当我部署耳朵时，我得到java.lang.IllegalStateException: No Scope registered for scope 'session'。

这是 history portlet的控制器，用户可以使用设置portlet的限制搜索消息历史记录。设置 portlet的控制器是相同的。


package com.foo;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletSession;
import javax.servlet.ServletContext;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.portlet.bind.annotation.ActionMapping;

import com.foo.application.UserSettings;
import javax.annotation.PostConstruct;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.ServletContextAware;

@Controller
@SessionAttributes({"searchQuery", "searchResults"})
@RequestMapping("VIEW")
public class ViewHistory extends ContextLoader implements ServletContextAware {
    private UserSettings userSettings;
    private ServletContext servletContext;

    @Override
    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

    @PostConstruct
    public void init() {
        ApplicationContext ctx = loadParentContext(servletContext);
        servletContext.setAttribute(LOCATOR_FACTORY_KEY_PARAM, "ear.context");
        userSettings = (UserSettings) ctx.getBean("userSettings");
    }

    @ModelAttribute("userSettings")
    public UserSettings createUserSettings(Model model) {
        model.addAttribute(userSettings);
    }

    @RequestMapping
    public String doSearch(Model model, PortletSession portletSession) {
        return "view";
    }

    @ActionMapping(params = "action=search")
    public void searchAction(
            Model model,
            ActionRequest request, ActionResponse response,
            BindingResult bindingResult, SessionStatus status)
    {
        // do nothing
    }
}

两场战争的web.xml文件（它们都相同）如下所示：

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>

    <context-param>
        <param-name>parentContextKey</param-name>
        <param-value>ear.context</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>

    <filter> 
        <filter-name>springFilter</filter-name> 
        <filter-class>
            org.springframework.web.filter.RequestContextFilter
        </filter-class>
    </filter> 
    <filter-mapping> 
        <filter-name>springFilter</filter-name> 
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet>
        <servlet-name>ViewRendererServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.ViewRendererServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>ViewRendererServlet</servlet-name>
        <url-pattern>/WEB-INF/servlet/view</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

Answer 1

事实证明，使用Spring的@EventMapping注释来进行普通的JSR 286事件非常简单。不需要耳朵，也没有父应用程序上下文。我只是将UserSettings.java放在一个单独的jar项目中，并将其作为war的依赖项包含在内。

search portlet的控制器如下所示：


package com.foo;

import com.foo.event.UserSettings;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.EventRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.portlet.bind.annotation.ActionMapping;

import javax.portlet.Event;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.portlet.bind.annotation.EventMapping;

@Controller
@RequestMapping("VIEW")
public class ViewHistory {
    private UserSettings userSettings = new UserSettings();

    @ModelAttribute("userSettings")
    public UserSettings createUserSettings(Model model) {
        return userSettings;
    }

    @RequestMapping
    public String doSearch(Model model) {
        return "view";
    }

    @ActionMapping(params = "action=search")
    public void searchAction(
            Model model,
            ActionRequest request, ActionResponse response,
            @ModelAttribute("userSettings") UserSettings userSettings,
            BindingResult bindingResult, SessionStatus status)
    {
        // do something
    }

    /**
     * Spring calls this whenever an event is received.
     * Can be limited to certain event.
     */
    @EventMapping
    public void handleEvent(EventRequest request) {
        Event event = request.getEvent();

        if (event.getName().equals("UserSettings")) {
            userSettings = (UserSettings)event.getValue();
        }
    }
}

...以及settings portlet：


package com.foo;

import com.foo.event.UserSettings;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.portlet.bind.annotation.ActionMapping;

import javax.xml.namespace.QName;
import org.springframework.web.bind.annotation.ModelAttribute;

@Controller
@RequestMapping("VIEW")
public class ViewSettings {
    private QName qname = new QName("http:foo.com/usersettings", "UserSettings");

    @ModelAttribute
    public UserSettings createUserSettings(Model model) {
        return new UserSettings();
    }

    @ActionMapping(params = "action=search")
    public void searchAction(
            Model model,
            ActionRequest request, ActionResponse response,
            @ModelAttribute("userSettings") UserSettings userSettings,
            BindingResult bindingResult, SessionStatus status)
    {
        // as soon as an action is triggered (save button is pressed or 
        // whatever), send the modified UserSettings instance as an 
        // event to the search portlet (actually any portlet, but I 
        // only have one that will read events).
        response.setEvent(qname, userSettings);
    }

    @RequestMapping
    public String doView(Model model) {
        return "view";
    }
}

在单独的war文件中的portlet之间共享bean

1 个答案: