javax.naming.ldap.InitialLdapContext#close ( )源码实例Demo

/**
 * Bind to the LDAP server for authentication
 */
private boolean createLdapInitContext(String username, Object credential) throws Exception
{
   // Get the admin context for searching
   InitialLdapContext ctx = null;
   ClassLoader currentTCCL = SecurityActions.getContextClassLoader();
   try
   {
      if (currentTCCL != null)
         SecurityActions.setContextClassLoader(null);
      ctx = constructInitialLdapContext(bindDN, bindCredential);
      // Validate the user by binding against the userDN
      bindDNAuthentication(ctx, username, credential, baseDN, baseFilter);
   }
   catch(Exception e)
   {
 	  throw e;
   }
finally
   {
      if (ctx != null)
         ctx.close();
      if (currentTCCL != null)
         SecurityActions.setContextClassLoader(currentTCCL);
   }
   return true;
}
 

protected void safeClose(InitialLdapContext ic)
{
	if(ic != null)
	{
		try
		{
			ic.close();
		}
		catch (NamingException e)
		{
		}
	}
}
 

protected String bindDNAuthentication(InitialLdapContext ctx, String user, Object credential, String baseDN,
      String filter) throws NamingException
{
   SearchControls constraints = new SearchControls();
   constraints.setSearchScope(searchScope);
   constraints.setTimeLimit(searchTimeLimit);
   String attrList[] = {distinguishedNameAttribute};
   constraints.setReturningAttributes(attrList);

   NamingEnumeration<SearchResult> results = null;

   Object[] filterArgs = {user};
   results = ctx.search(baseDN, filter, filterArgs, constraints);
   if (!results.hasMore())
   {
      results.close();
      throw PicketBoxMessages.MESSAGES.failedToFindBaseContextDN(baseDN);
   }

   SearchResult sr = results.next();
   String name = sr.getName();
   String userDN = null;
   Attributes attrs = sr.getAttributes();
   if (attrs != null)
   {
      Attribute dn = attrs.get(distinguishedNameAttribute);
      if (dn != null)
      {
         userDN = (String) dn.get();
      }
   }
   if (userDN == null)
   {
      if (sr.isRelative())
         userDN = name + ("".equals(baseDN) ? "" : "," + baseDN);
      else
         throw PicketBoxMessages.MESSAGES.unableToFollowReferralForAuth(name);
   }

   results.close();
   results = null;
   // Bind as the user dn to authenticate the user
   InitialLdapContext userCtx = constructInitialLdapContext(userDN, credential);
   userCtx.close();

   return userDN;
}