Advanced Topics in Java

Generating QR Code in Java Advanced Topics
578 Advanced Topics
Generating QR Code In Java
Using Barcode printer for Java Control to generate, create QR Code JIS X 0510 image in Java applications.
easily discover the DN that a connection is authenticated as and many other properties of the connection Execute an extended operation by constructing an LDAPExtendedOperation object and passing it to LDAPConnectionextendedOperation The return value is another LDAPExtendedOperation LDAPExtendedOperation takes an OID and a byte array as constructor arguments The member variables can be accessed with getID and getValue Our getAuthDN extended operation has no data to pass to the server, but a DN will be returned The code to query for the authentication DN looks like this:
Bar Code Printer In Java
Using Barcode encoder for Java Control to generate, create barcode image in Java applications.
import javautilEnumeration; import javaioUnsupportedEncodingException; import netscapeldap*; // Define the OID of our extended operation public static final String GETIDEXTOP = "333331"; // Check if the server supports the GETIDEXTOP operation // by reading the root DSE and checking for supported // extensions String attrs[] = { "supportedExtension" }; LDAPEntry entry = ldread( "", attrs ); LDAPAttribute attr = entrygetAttribute( attrs[0] ); boolean doesSupport = false; if ( attr != null ) { Enumeration en = attrgetStringValues(); while( (en != null) && enhasMoreElements() ) { if ( GETIDEXTOPequals( (String)ennextElement() ) ) { doesSupport = true; break; } } } if ( doesSupport ) { // The server supports our op, so ask it for the auth DN LDAPExtendedOperation extOp = ldextendedOperation( new LDAPExtendedOperation( GETIDEXTOP, null ) ); String authDN = null; // The value must be converted from UTF8 to a Java // String
Recognize Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Aiming for 24 7: Failover and Reconnecting 579
QR Creation In Visual C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create QR image in .NET applications.
try { authDN = new String( extOpgetValue(), "UTF8" ); } catch ( UnsupportedEncodingException e ) { } Systemoutprintln( "Authenticated as " + authDN ); } else { Systemoutprintln( "Server does not support the " + "getAuthDN extended operation" ); }
Generating QR Code In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
Aiming for 24 7: Failover and Reconnecting
Encode QR In .NET Framework
Using Barcode generation for Visual Studio .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
The LDAPConnectionconnect methods can take more than just a host name or IP address for the host name parameter The parameter can be a space-delimited list of hosts, with an optional colon and port number for each for example:
QR Printer In VB.NET
Using Barcode generation for VS .NET Control to generate, create Quick Response Code image in .NET framework applications.
String hosts = "directoryknowledgecom:1050 peoplecatalogcom 19925412"; ldconnect( hosts, 20000 );
Code39 Generator In Java
Using Barcode encoder for Java Control to generate, create Code39 image in Java applications.
In this example, three alternative hosts are speci ed The rst one also has the port number identi ed; the second and third ones will use the port number passed as the second parameter to the method: 20000 The SDK will attempt to connect to the rst host in the list If that fails, it will try the second one, and so on You can tune the connection policy with LDAPConnectionsetConnSetupDelay The default policy is LDAPConnectionNODELAY_SERIAL that is, to try each host in turn until one can be reached In many cases, there will be an unacceptable delay if the rst host or hosts are inaccessible because the server is down or because there is a network problem The length of the delay may depend on your operating system and other factors, but it will typically be at least 45 seconds (the length of the TCP/IP socket time-out) The other connection failover options LDAPConnectionNODELAY_PARALLEL and parallel connection with a selectable delay help manage this situation With NODELAY_PARALLEL, the SDK will create threads that simultaneously attempt to connect to each of the speci ed hosts The rst one to successfully establish a connection wins, and the other connections are discarded Generally this means that if at least one LDAP server is up and running, your application won t be delayed by any others that are down With the parallel option with a selectable delay, there is a delay (speci ed in seconds) between starting each thread; if the rst thread can establish a connection within the delay interval, no attempt is made to contact other servers The following shows an example of each setting
UCC - 12 Creator In Java
Using Barcode drawer for Java Control to generate, create UPC Symbol image in Java applications.
580 Advanced Topics
Print EAN128 In Java
Using Barcode maker for Java Control to generate, create UCC.EAN - 128 image in Java applications.
ldsetConnSetupDelay( LDAPConnectionNODELAY_SERIAL ); ldsetConnSetupDelay( LDAPConnectionNODELAY_PARALLEL ); ldsetConnSetupDelay( 10 ); // 10 seconds between threads
Bar Code Printer In Java
Using Barcode creator for Java Control to generate, create barcode image in Java applications.
Data Matrix ECC200 Printer In Java
Using Barcode creator for Java Control to generate, create Data Matrix image in Java applications.
Drawing ECC200 In .NET
Using Barcode generator for ASP.NET Control to generate, create ECC200 image in ASP.NET applications.
Encoding Bar Code In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create bar code image in .NET applications.
Barcode Encoder In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create bar code image in .NET applications.
Generating Barcode In VS .NET
Using Barcode maker for Visual Studio .NET Control to generate, create barcode image in .NET framework applications.