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问Spring请求范围和JSF请求范围之间的区别？
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Stack Overflow用户

提问于 2013-09-09 21:17:02

回答 2查看 1.3K关注 0票数 0

我正在开发一个使用JSF1.2的JSR-286 portlet应用程序。我正在努力将JSF管理的bean迁移到Spring，并且我注意到Spring处理请求作用域与JSF处理请求作用域的方式有什么不同。

在我的portlet应用程序中，我有两个驻留在同一个页面上的portlet，它们都使用相同的JSF页面视图。当我使用JSF托管请求bean时，会为每个portlet创建一个单独的请求bean，这就是我正在寻找的行为。当我使用Spring时，只创建一个请求bean，并在两个portlets之间共享。这是正常行为吗？我能阻止它这样做吗？

在将bean移到Spring之前，我的原始faces-config.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<faces-config
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-facesconfig_1_2.xsd"
version="1.2">
<application>
    <state-manager>com.ibm.faces.application.DevelopmentStateManager</state-manager>
    <variable-resolver>com.ibm.faces.portlet.PortletVariableResolver</variable-resolver>
</application>
<factory>
    <faces-context-factory>com.ibm.faces.context.AjaxFacesContextFactory</faces-context-factory>
    <render-kit-factory>com.ibm.faces.renderkit.AjaxRenderKitFactory</render-kit-factory>
</factory>

<managed-bean>
    <managed-bean-name>sessionBean</managed-bean-name>
    <managed-bean-class>sanitycheck.SessionBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
</managed-bean>

<managed-bean>
    <managed-bean-name>pc_SanityCheckProjectView</managed-bean-name>
    <managed-bean-class>sanitycheck.SanityCheckProjectView</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
    <managed-property>
        <property-name>sessionBean</property-name>
        <value>#{sessionBean}</value>
    </managed-property>
</managed-bean>

<lifecycle>
    <phase-listener>com.ibm.faces.webapp.ValueResourcePhaseListener</phase-listener>
</lifecycle>

</faces-config>

在将bean移动到Spring之后，我的faces-config.xml文件：

<?xml version="1.0" encoding="UTF-8"?>

<faces-config
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-facesconfig_1_2.xsd"
version="1.2">
<application>
    <state-manager>com.ibm.faces.application.DevelopmentStateManager</state-manager>
    <variable-resolver>com.ibm.faces.portlet.PortletVariableResolver</variable-resolver>
    <variable-resolver>org.springframework.web.jsf.DelegatingVariableResolver</variable-resolver>
</application>
<factory>
    <faces-context-factory>com.ibm.faces.context.AjaxFacesContextFactory</faces-context-factory>
    <render-kit-factory>com.ibm.faces.renderkit.AjaxRenderKitFactory</render-kit-factory>
</factory>

<lifecycle>
    <phase-listener>com.ibm.faces.webapp.ValueResourcePhaseListener</phase-listener>
</lifecycle>

</faces-config>

以及我的spring-web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">

<bean id="sessionBean" class="sanitycheck.SessionBean" scope="session">
               <aop:scoped-proxy/>
    </bean>

<bean id="pc_SanityCheckProjectView" class="pagecode.SanityCheckProjectView" scope="request" init-method="init">
               <aop:scoped-proxy/>
    <property name="sessionBean" ref="sessionBean"/>
</bean>
</beans>

如果需要的话，我可以提供我的其他文件，让我知道。谢谢!

编辑:添加aop:作用域-代理到Spring。

编辑:添加portlet.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<portlet-app xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd" version="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd" id="com.ibm.faces.portlet.FacesPortlet.3a22ca3014">
<portlet>
    <portlet-name>SanityCheckProject</portlet-name>
    <display-name xml:lang="en">SanityCheckProject</display-name>
    <display-name>SanityCheckProject</display-name>
    <portlet-class>com.ibm.faces.portlet.FacesPortlet</portlet-class>
    <init-param>
        <name>com.ibm.faces.portlet.page.view</name>
        <value>/SanityCheckProjectView.jsp</value>
    </init-param>
    <init-param>
        <name>whichOne</name>
        <value>Portlet1</value>
    </init-param>
    <init-param>
        <name>wps.markup</name>
        <value>html</value>
    </init-param>
    <expiration-cache>0</expiration-cache>
    <supports>
        <mime-type>text/html</mime-type>
        <portlet-mode>view</portlet-mode>
    </supports>
    <supported-locale>en</supported-locale>
    <resource-bundle>com.ibm.sanitycheckproject.nl.SanityCheckProjectPortletResource</resource-bundle>
    <portlet-info>
        <title>SanityCheckProject</title>
        <short-title>SanityCheckProject</short-title>
        <keywords>SanityCheckProject</keywords>
    </portlet-info>
</portlet>
<portlet>
    <portlet-name>SanityCheckPortlet2</portlet-name>
    <display-name xml:lang="en">SanityCheckPortlet2</display-name>
    <display-name>SanityCheckPortlet2</display-name>
    <portlet-class>com.ibm.faces.portlet.FacesPortlet</portlet-class>
    <init-param>
        <name>com.ibm.faces.portlet.page.view</name>
        <value>/SanityCheckProjectView.jsp</value>
    </init-param>
    <init-param>
        <name>whichOne</name>
        <value>Portlet2</value>
    </init-param>
    <init-param>
        <name>wps.markup</name>
        <value>html</value>
    </init-param>
    <expiration-cache>0</expiration-cache>
    <supports>
        <mime-type>text/html</mime-type>
        <portlet-mode>view</portlet-mode>
    </supports>
    <supported-locale>en</supported-locale>
    <resource-bundle>com.ibm.sanitycheckproject.nl.SanityCheckPortlet2PortletResource</resource-bundle>
    <portlet-info>
        <title>SanityCheckPortlet2</title>
        <short-title>SanityCheckPortlet2</short-title>
        <keywords>SanityCheckPortlet2</keywords>
    </portlet-info>
</portlet>
<default-namespace>http://SanityCheckProject/</default-namespace>
</portlet-app>

jsf-1.2

jsr286

spring

scope

portlet

回答 2

Stack Overflow用户

回答已采纳

发布于 2014-02-18 20:34:25

我不知道这是否是最好的解决方案，甚至是非常好的解决方案，但我最终所做的是创建两个自定义portlet作用域，一个用于请求作用域，另一个用于会话作用域。本质上，我的自定义作用域的作用是，它们在请求的对象的名称前加上portlet的名称空间，这似乎使所有内容都保持了分离。

下面是我为我的作用域使用的代码：

请求范围：

import javax.faces.context.FacesContext;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.web.context.request.RequestScope;
import com.ibm.faces.portlet.httpbridge.ActionResponseWrapper;
import javax.portlet.RenderResponse;
import javax.portlet.filter.RenderResponseWrapper;

public class PortletRequestScope extends RequestScope {

@Override
public Object get(String name, ObjectFactory objectFactory) {
    Object response = FacesContext.getCurrentInstance().getExternalContext().getResponse();
    if (response instanceof RenderResponse) {
        String namespace=((RenderResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.get(namespace + name, objectFactory);
    }
    else if (response instanceof RenderResponseWrapper) {
        String namespace=((RenderResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.get(namespace + name, objectFactory);
    }
    else if (response instanceof ActionResponseWrapper) {
        String namespace=((ActionResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.get(namespace + name, objectFactory);
    }
    else {
        writeError(response);
    }
    return super.get(name, objectFactory);
}

@Override
public void registerDestructionCallback(String name, Runnable callback) {
    Object response = FacesContext.getCurrentInstance().getExternalContext().getResponse();
    if (response instanceof RenderResponse) {
        String namespace=((RenderResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        super.registerDestructionCallback(namespace+name, callback);
    }
    else if (response instanceof RenderResponseWrapper) {
        String namespace=((RenderResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        super.registerDestructionCallback(namespace+name, callback);
    }
    else if (response instanceof ActionResponseWrapper) {
        String namespace=((ActionResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        super.registerDestructionCallback(namespace+name, callback);
    }
    else {
        writeError(response);
    }
    super.registerDestructionCallback(name, callback);
}

@Override
public Object remove(String name) {
    Object response = FacesContext.getCurrentInstance().getExternalContext().getResponse();
    if (response instanceof RenderResponse) {
        String namespace=((RenderResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.remove(namespace+name);
    }
    else if (response instanceof RenderResponseWrapper) {
        String namespace=((RenderResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.remove(namespace+name);
    }
    else if (response instanceof ActionResponseWrapper) {
        String namespace=((ActionResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.remove(namespace+name);
    }
    else {
        writeError(response);
    }
    return super.remove(name);
}

protected void writeError(Object response) {
    System.err.println("Error in PortletRequestScope");
    System.err.println("Response is unrecognized class: " + response.getClass().getCanonicalName());
    System.err.println("Please modify code to handle class");
}

}

会议范围：

import javax.faces.context.FacesContext;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.web.context.request.SessionScope;
import com.ibm.faces.portlet.httpbridge.ActionResponseWrapper;
import javax.portlet.RenderResponse;
import javax.portlet.filter.RenderResponseWrapper;

public class PortletSessionScope extends SessionScope {

@Override
public Object get(String name, ObjectFactory objectFactory) {
        Object response =  FacesContext.getCurrentInstance().getExternalContext().getResponse();
        if (response instanceof RenderResponse) {
            String namespace=((RenderResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
            return super.get(namespace + name, objectFactory);
        }
        else if (response instanceof RenderResponseWrapper) {
            String namespace=((RenderResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
            return super.get(namespace + name, objectFactory);
        }
        else if (response instanceof ActionResponseWrapper) {
            String namespace=((ActionResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
            return super.get(namespace + name, objectFactory);
        }
        else {
            writeError(response);
        }
    return super.get(name, objectFactory);
}

@Override
public void registerDestructionCallback(String name, Runnable callback) {
    Object response = FacesContext.getCurrentInstance().getExternalContext().getResponse();
    if (response instanceof RenderResponse) {
        String namespace=((RenderResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        super.registerDestructionCallback(namespace+name, callback);
    }
    else if (response instanceof RenderResponseWrapper) {
        String namespace=((RenderResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        super.registerDestructionCallback(namespace+name, callback);
    }
    else if (response instanceof ActionResponseWrapper) {
        String namespace=((ActionResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        super.registerDestructionCallback(namespace+name, callback);
    }
    else {
        writeError(response);
    }
    super.registerDestructionCallback(name, callback);
}

@Override
public Object remove(String name) {
    Object response = FacesContext.getCurrentInstance().getExternalContext().getResponse();
    if (response instanceof RenderResponse) {
        String namespace=((RenderResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.remove(namespace+name);
    }
    else if (response instanceof RenderResponseWrapper) {
        String namespace=((RenderResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.remove(namespace+name);
    }
    else if (response instanceof ActionResponseWrapper) {
        String namespace=((ActionResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse()).getNamespace();
        return super.remove(namespace+name);
    }
    else {
        writeError(response);
    }
    return super.remove(name);
}

protected void writeError(Object response) {
    System.err.println("Error in PortletSessionScope");
    System.err.println("Response is unrecognized class: " + response.getClass().getCanonicalName());
    System.err.println("Please modify code to handle class");
}

}

然后，在spring-web.xml中，我定义了我的自定义范围：

<bean class="org.springframework.beans.factory.config.CustomScopeConfigurer">
<property name="scopes">
    <map>
        <entry key="portletRequestScope">
            <bean class="com.test.scope.PortletRequestScope"/>
        </entry>
        <entry key="portletSessionScope">
            <bean class="com.test.portlet.scope.PortletSessionScope"/>
        </entry>
    </map>
</property>
</bean>

在定义实际Spring时，我使用了自定义作用域而不是常规作用域--例如：

<bean id="sessionBean" class="com.test.managedbeans.SessionBean"
scope="portletSessionScope" lazy-init="true"/>

至少，在我在WebSphere门户上使用JSF + Spring的特定情况下，这样做似乎是可行的，希望这将对其他人有所帮助。

票数 0

Stack Overflow用户

发布于 2013-09-09 21:45:15

在Spring中，必须使用<aop:scoped-proxy/>标记。

http://static.springsource.org/spring/docs/3.0.x/reference/beans.html#beans-factory-scopes-other-injection

<!-- an HTTP Session-scoped bean exposed as a proxy -->
<bean id="userPreferences" class="com.foo.UserPreferences" scope="session">
    <!-- this next element effects the proxying of the surrounding bean -->
    <aop:scoped-proxy/>
</bean>

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/18707169

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