DU2 The Discovery Management Interfaces in Java

Printer Code-128 in Java DU2 The Discovery Management Interfaces
DU2 The Discovery Management Interfaces
ANSI/AIM Code 128 Generator In Java
Using Barcode generator for Java Control to generate, create Code 128A image in Java applications.
O'Reilly Network Safari Bookshelf Jini Specifications, The, Second Edition
Encode Bar Code In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Section: DU Jini Discovery Utilities Specification
Recognize Bar Code In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
DU3 LookupDiscovery Utility
USS Code 128 Printer In Visual C#.NET
Using Barcode maker for VS .NET Control to generate, create Code128 image in Visual Studio .NET applications.
In a Jini application environment the multicast discovery protocols are often collectively referred to as multicast discovery or group discovery The entities that participate in the multicast discovery protocol are a discovering entity (Jini client or service) and a Jini lookup service, which acts as the entity that is to be discovered When the discovering entity starts, it uses the multicast request protocol to announce its interest in finding lookup services within range After a specified amount of time, the entity stops sending multicast requests, and simply listens for multicast announcements from any lookup services within range that may be broadcasting their availability Through either of these protocols, the discovering entity can obtain references to lookup services belonging to member group in which the entity is interested For the details of the multicast discovery protocols, refer to the The Jini Technology Core Platform Specification, "Discovery and Join" The LookupDiscovery helper utility in the package netjinidiscovery encapsulates the functionality required of an entity that wishes to employ multicast discovery to discover a lookup service located within the entity's multicast radius (roughly, the number of hops beyond which neither the multicast requests from the entity, nor the multicast announcements from the lookup service, will propagate) This utility provides an implementation that makes the process of acquiring lookup service instances, based on no information other than group membership, much simpler for both services and clients DU31 Other Types The types defined in the specification of the LookupDiscovery utility class are in the netjinidiscovery package The following additional types may also be referenced in this specification Whenever referenced, these object types will be referenced in unqualified form:
Code 128 Code Set C Printer In .NET
Using Barcode creation for ASP.NET Control to generate, create Code 128A image in ASP.NET applications.
netjinicorediscoveryLookupLocator netjinidiscoveryDiscoveryManagement netjinidiscoveryDiscoveryGroupManagement netjinidiscoveryDiscoveryPermission javaioIOException javaioSerializable javasecurityPermission
Code128 Generation In .NET Framework
Using Barcode encoder for .NET Control to generate, create Code 128C image in .NET framework applications.
DU32 The Interface The public methods provided by the LookupDiscovery class are as follows:
Code 128C Generator In Visual Basic .NET
Using Barcode creator for .NET framework Control to generate, create Code 128 Code Set C image in Visual Studio .NET applications.
package netjinidiscovery; public class LookupDiscovery implements DiscoveryManagement, DiscoveryGroupManagement { public static final String[] ALL_GROUPS = DiscoveryGroupManagementALL_GROUPS; public static final String[] NO_GROUPS = DiscoveryGroupManagementNO_GROUPS; public LookupDiscovery(String[] groups) throws IOException {} }
Creating Data Matrix 2d Barcode In Java
Using Barcode drawer for Java Control to generate, create Data Matrix image in Java applications.
DU3 LookupDiscovery Utility
Draw GS1-128 In Java
Using Barcode generation for Java Control to generate, create UCC.EAN - 128 image in Java applications.
O'Reilly Network Safari Bookshelf Jini Specifications, The, Second Edition DU33 The Semantics The only new public method of the LookupDiscovery helper utility class is the constructor All other public methods implemented by this class are specified in the DiscoveryManagement and the DiscoveryGroupManagement interfaces Each instance of the LookupDiscovery class must behave as if it operates independently of all other instances The equals method for this class returns true if and only if two instances of this class refer to the same object That is, x and y are equal instances of this class if and only if x==y has the value true For convenience, this class defines the constants ALL_GROUPS and NO_GROUPS, which represent no set and the empty set respectively For more information on these constants, refer to the specification of the DiscoveryGroupManagement interface The constructor of the LookupDiscovery class takes a single input parameter: a String array, none of whose elements may be null If at least one element of the input array is null, a NullPointerException is thrown Constructing this class using an input array that contains duplicate group names is equivalent to constructing the class using an array with the duplicates removed If null (ALL_GROUPS) is input to the constructor, then attempts will be made to discover all lookup services located within the current multicast radius, regardless of group membership Although discovery events will not be sent by this class until a listener is added through an invocation of the addListener method, discovery processing usually starts as soon as an instance of this class is constructed However, if an empty array (NO_GROUPS) is passed to the constructor, discovery will not be started until the addGroups or setGroups method is called to change the initial empty set of groups to either a non empty set, or null (ALL_GROUPS) The constructor can throw an IOException because the creation of a LookupDiscovery object causes the initiation of the discovery process, a process that can throw IOException when socket allocation occurs DU34 Supporting Interfaces and Classes The LookupDiscovery helper utility class depends on the interfaces DiscoveryManagement and DiscoveryGroupManagement, and on the concrete class DiscoveryPermission
Draw Barcode In Java
Using Barcode creator for Java Control to generate, create bar code image in Java applications.
UPC A Creation In Java
Using Barcode generation for Java Control to generate, create UPC Symbol image in Java applications.
Generate USD-4 In Java
Using Barcode generator for Java Control to generate, create ANSI/AIM Codabar image in Java applications.
Generating Bar Code In .NET Framework
Using Barcode encoder for .NET Control to generate, create barcode image in VS .NET applications.
UPC Symbol Reader In Visual Studio .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
ECC200 Maker In VS .NET
Using Barcode maker for ASP.NET Control to generate, create Data Matrix ECC200 image in ASP.NET applications.