的JavaEE：@Resource註釋未注入JNDI資源

Question

這裏是我的環境設置：
1的Apache Tomcat 1.6.2 EE（Java EE 6的認證）
2的Java 1.7.0_65
3. JAAS

A）WEB-INF/context.xml的

<?xml version="1.0" encoding="UTF-8"?> 
<context> 
<!-- Use JAASRealm --> 
<Realm className="org.apache.catalina.realm.JAASRealm" appName="JAASLoginModule" 
    userClassNames="com.jaas.login.module.UserPrincipal" roleClassNames="com.jaas.login.module.RolePrincipal" /> 

<Resource name="ldapRes" 
      auth="Application" 
      type="org.apache.directory.ldap.client.api.LdapNetworkConnection" 
      factory="com.ldap.factory.services.LdapContextFactory" 
      singleton="true" 
      java.naming.provider.url="ldap://127.0.0.1:389" 
      java.naming.security.authentication="simple" 
      java.naming.security.principal="cn=admin,dc=example,dc=com,dc=au" 
      java.naming.security.credentials="a0120733@OPENLDAP" /> 
</context> 

B）的web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
id="WebApp_ID" version="3.0"> 

: 

<resource-ref> 
    <description> 
     LDAP Resource 
    </description> 
    <res-ref-name> 
     ldapResRef 
    </res-ref-name> 
    <lookup-name> 
     java:comp/env/ldapRes 
    </lookup-name> 
    </resource-ref> 

</web-app> 

C）LdapContextFactory類

public class LdapContextFactory implements ObjectFactory { 

public Object getObjectInstance(Object obj, Name name, Context nameCtx, 
     Hashtable<?, ?> environment) throws Exception { 

    System.out.println("getObjectInstance"); 
    Hashtable<Object, String> configurations = new Hashtable<Object, String>(); 
    Reference reference = (Reference) obj; 
    Enumeration<RefAddr> references = reference.getAll(); 

    while (references.hasMoreElements()) { 
     RefAddr address = references.nextElement(); 
     String type = address.getType(); 
     String content = (String) address.getContent(); 

     switch (type) { 
     case Context.PROVIDER_URL: 
      configurations.put(Context.PROVIDER_URL, content); 
      break; 
     case Context.SECURITY_AUTHENTICATION: 
      configurations.put(Context.SECURITY_AUTHENTICATION, content); 
      break; 
     case Context.SECURITY_PRINCIPAL: 
      configurations.put(Context.SECURITY_PRINCIPAL, content); 
      break; 
     case Context.SECURITY_CREDENTIALS: 
      configurations.put(Context.SECURITY_CREDENTIALS, content); 
      break; 
     default: 
      break; 
     } 
    } 

    int startIndexIP = ((String) configurations.get(Context.PROVIDER_URL)) 
      .lastIndexOf("//") + 2; 
    int lastIndexIP = ((String) configurations.get(Context.PROVIDER_URL)) 
      .lastIndexOf(':'); 
    String ldapHost = ((String) configurations.get(Context.PROVIDER_URL)) 
      .substring(startIndexIP, lastIndexIP); 
    int ldapPort = Integer.parseInt(((String) configurations 
      .get(Context.PROVIDER_URL)).substring(lastIndexIP + 1)); 

    return new LdapNetworkConnection(ldapHost, ldapPort); 

} 

} 

d）JAASLoginModule類

public class JAASLoginModule implements LoginModule { 
: 
public boolean login() throws LoginException { 
    if (callbackHandler == null) 
     throw new LoginException("no handler"); 

    NameCallback nameCall = new NameCallback("username: "); 
    PasswordCallback passCall = new PasswordCallback("password: ", false); 
    try { 
     callbackHandler.handle(new Callback[]{nameCall, passCall}); 
    } catch (UnsupportedCallbackException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    System.out.println(nameCall.getName()); 
    System.out.println(passCall.getPassword()); 

    LdapConnection connection = new LdapResourceConnection().getLdapConnection(); 

    try { 
     System.out.println(connection); 
      : 

} 

E）LdapResourceConnection類

public class LdapResourceConnection { 

private LdapNetworkConnection ldapConnection; 

public LdapConnection getLdapConnection() { 
    System.out.println("GET .."); 
    return ldapConnection; 
} 

@Resource(lookup="java:comp/env/ldapResRef") 
public void setLdapConnection(LdapNetworkConnection ldapConnection) { 
    System.out.println("SET .."); 
    this.ldapConnection = ldapConnection; 
} 

} 

問題：
在登錄模塊

LdapConnection connection = new LdapResourceConnection().getLdapConnection(); 

這無法運行LdapResourceConnection setLdapConnection（）方法。我在這個命令上得到的只是「GET ..」被打印但不是「SET ..」。

請幫忙。
謝謝。

Answer 1

你的問題是你正在創建自己的LdapResourceConnection，所以容器（應用服務器/ CDI）不能注入任何東西。

爲了能夠使用注入bean，這個bean應該被容器管理（創建/處置）。

要糾正此登錄模塊，你應該注入LdapResourceConnection

@Inject 
LdapResourceConnection ldapResourceConnection; 
... 
LdapConnection connection = ldapResourceConnection.getLdapConnection()