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社区首页 >问答首页 >CDI不能注入FirefoxDriver (硒)

问CDI不能注入FirefoxDriver (硒)
EN

Stack Overflow用户
提问于 2015-01-26 19:04:18
回答 1查看 202关注 0票数 0

我试图在需要时使用CDI注入firefox (避免总是配置驱动程序)。但我总是得到NullPointer。

我为火狐驱动程序创建了一个生产者

代码语言：javascript
复制
@ApplicationScoped
public class FirefoxDriverProducer {

    @Produces @RequestScoped
    public FirefoxDriver getDriver() {

        // Inicia o Firefox pelo Selenium
        String caminhoFirefox = "/usr/bin/firefox";
        String profileFirefox = "Selenium";

        // Aponta o caminho para o firefox
        File pathToBinary = new File(caminhoFirefox);
        FirefoxBinary ffBinary = new FirefoxBinary(pathToBinary);

        // Profile que precisa ser criado no firefox
        ProfilesIni profile = new ProfilesIni();
        FirefoxProfile myprofile = profile.getProfile(profileFirefox);

        // Proxy
        String PROXY = "companyproxy:8080";
        org.openqa.selenium.Proxy proxy = new org.openqa.selenium.Proxy();
        proxy.setHttpProxy(PROXY).setFtpProxy(PROXY).setSslProxy(PROXY);
        DesiredCapabilities cap = new DesiredCapabilities();
        cap.setCapability(CapabilityType.PROXY, proxy);

        FirefoxDriver driver = new FirefoxDriver(ffBinary, myprofile, cap);

        return driver;
    }

    public void close(@Disposes FirefoxDriver driver) {
        driver.quit();
    }

}

当我想用它的时候，我就这样叫它：

代码语言：javascript
复制
@Inject
private FirefoxDriver driver;

和其他任何物体一样，我想注入。但是我总是得到NullPointer，当我尝试调试驱动程序时，它总是空的，通过在生产者方法getDriver()中放置一个断点，它甚至没有被调用.

在同一个项目中，我已经做了一些类似的事情，使用FacesContext和NavigationHandler，它们都工作得很好。

ps:我在运行Wildfly 8，beans.xml在我的web上。

ps2:我之所以这么做，是因为我需要访问另一个公司的网站，并不时地下载一些信息，因为它们不提供任何web服务或其他任何东西，只有通过web浏览器。

ps3:如果我不使用CDI，并从生产者那里获取所有代码并将其放到我所称的类中，它就能正常工作。所以我假设这不是硒的问题

堆栈追踪器：

代码语言：javascript
复制
16:48:29,632 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (default task-43) #{testeBean.teste()}: java.lang.NullPointerException: javax.faces.FacesException: #{testeBean.teste()}: java.lang.NullPointerException
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_25]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_25]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_25]
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.2.8-jbossorg-1.jar:]
    ... 33 more
Caused by: java.lang.NullPointerException
    at br.com.timbrasil.bluemonster.csr.DownloadCsr.<init>(DownloadCsr.java:49) [classes:]
    at br.com.timbrasil.bluemonster.csr.TesteBean.teste(TesteBean.java:24) [classes:]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_25]
    at java.lang.reflect.Method.invoke(Method.java:483) [rt.jar:1.8.0_25]
    at javax.el.ELUtil.invokeMethod(ELUtil.java:308) [jboss-el-api_3.0_spec-1.0.3.Final.jar:1.0.3.Final]
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:537) [jboss-el-api_3.0_spec-1.0.3.Final.jar:1.0.3.Final]
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256) [jboss-el-api_3.0_spec-1.0.3.Final.jar:1.0.3.Final]
    at com.sun.el.parser.AstValue.invoke(AstValue.java:286) [javax.el-3.0.1-b05.jar:]
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) [javax.el-3.0.1-b05.jar:]
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) [weld-core-impl-2.2.6.Final.jar:2014-10-03 10:05]
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.2.8-jbossorg-1.jar:]
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87) [jboss-jsf-api_2.2_spec-2.2.8.jar:2.2.8]
    ... 34 more

16:48:29,642 SEVERE [javax.enterprise.resource.webcontainer.jsf.context] (default task-43) javax.faces.el.EvaluationException: java.lang.NullPointerException
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61)
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45)
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63)
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70)
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261)
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at br.com.timbrasil.bluemonster.csr.DownloadCsr.<init>(DownloadCsr.java:49)
    at br.com.timbrasil.bluemonster.csr.TesteBean.teste(TesteBean.java:24)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at javax.el.ELUtil.invokeMethod(ELUtil.java:308)
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:537)
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:286)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
    ... 34 more

@Edit

我的Download类，其中注入了FireFoxDriver：

代码语言：javascript
复制
public class DownloadCsr {

    @Inject
    private FirefoxDriver driver;

    public DownloadCsr(String usuario, String senha, LocalDateTime dataInicial,
            LocalDateTime dataFinal) throws LoginException {

        driver.get("https://companysite.net");

        // Encontra o elemento para inserir o usuario
        WebElement webUsuario = getElementByLocator(By.name("USER"), driver);
        // Insere o usuario
        webUsuario.sendKeys(usuario);

        // Encontra o elemento para inserir a senha
        WebElement webSenha = getElementByLocator(By.name("PASSWORD"), driver);
        // Insere a senha
        webSenha.sendKeys(senha);

        // Acha o bot�o de login e clica
        WebElement button = getElementByLocator(By.name("IMAGE1"), driver);
        button.click();

        // Confere se logou na pagina verificando o titulo dela, do contrario
        // lança a exceção
        if (!driver.getTitle().equals("Business Home")) {
            throw new LoginException("Can't reach the loged-in page");
        }

    }

为了进行测试，我使用以下方法。

代码语言：javascript
复制
@Named
@RequestScoped
public class TesteBean implements Serializable {

    public void teste() {
        LocalDateTime dataInicial = LocalDateTime.now().minusDays(1);
        LocalDateTime dataFinal = LocalDateTime.now();

        try {
            new DownloadCsr("login", "password",
                    dataInicial, dataFinal);
        } catch (LoginException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}
selenium
cdi
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2015-01-27 19:47:43

您的问题来自这样一个事实：DownloadCsr不是一个bean。它有一个带有参数的构造函数，并在类TesteBean中实例化它。要获得CDI特性，必须让CDI容器为您实例化bean，并作为其他可注入bean提供所有需要的信息。换句话说:使用new可以给出一个未被管理的未注入实例。

将业务代码放入构造函数中也是一种不好的做法。构造函数应该只包含初始化代码。在构造函数期间，没有一个字段被注入，所以即使您的DownloadCsr满足成为bean的要求，您的构造函数中也会有一个NPE。

你能做的就是这样：

代码语言：javascript
复制
@Named
@RequestScoped
public class TesteBean implements Serializable {

@Inject
private DownloadCsr dcsr;

  public void teste() {
    LocalDateTime dataInicial = LocalDateTime.now().minusDays(1);
    LocalDateTime dataFinal = LocalDateTime.now();

    try {
        dcsr.crawl("login","password", dataInicial, dataFinal);
    } catch (LoginException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
  }

}

使用以下DownloadCsr

代码语言：javascript
复制
public class DownloadCsr {

  @Inject
  private FirefoxDriver driver;

  public void crawl(String usuario, String senha, LocalDateTime dataInicial,
        LocalDateTime dataFinal) throws LoginException {

    driver.get("https://companysite.net");

    // Encontra o elemento para inserir o usuario
    WebElement webUsuario = getElementByLocator(By.name("USER"), driver);
    // Insere o usuario
    webUsuario.sendKeys(usuario);

    // Encontra o elemento para inserir a senha
    WebElement webSenha = getElementByLocator(By.name("PASSWORD"), driver);
    // Insere a senha
    webSenha.sendKeys(senha);

    // Acha o boto de login e clica
    WebElement button = getElementByLocator(By.name("IMAGE1"), driver);
    button.click();

    // Confere se logou na pagina verificando o titulo dela, do contrario
    // lança a exceção
    if (!driver.getTitle().equals("Business Home")) {
        throw new LoginException("Can't reach the loged-in page");
    }

  }
}
票数 2
EN
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/28156906

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