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Diffstat (limited to 'libjava/classpath/java/rmi/Naming.java')
| -rw-r--r-- | libjava/classpath/java/rmi/Naming.java | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/libjava/classpath/java/rmi/Naming.java b/libjava/classpath/java/rmi/Naming.java new file mode 100644 index 00000000000..d48df069d8d --- /dev/null +++ b/libjava/classpath/java/rmi/Naming.java @@ -0,0 +1,220 @@ +/* Naming.java -- + Copyright (c) 1996, 1997, 1998, 1999, 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.rmi; + +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.URL; +import java.rmi.registry.LocateRegistry; +import java.rmi.registry.Registry; + +/** + * <p> + * The <code>Naming</code> class handles interactions with RMI registries. + * Each method takes a URL in <code>String</code> form, which points to + * the RMI registry. The scheme of the URL is irrelevant. The relevant + * part is: + * </p> + * <p> + * <code>//host:port/name</code> + * </p> + * <p> + * which tells the method how to locate and access the registry. The host + * and port are both optional, and default to `localhost' and the standard + * RMI registry port (1099) respectively. The name is simply a string + * used to refer to a particular service hosted by the registry. The + * registry does not attempt to interpret this further. + * </p> + * <p> + * RMI services are registered using one of these names, and the same name + * is later used by the client to lookup the service and access its methods. + * Registries can be shared by multiple services, or a service can create + * its own registry using <code>createRegistry()</code>. + * </p> + * + * @author Original author unknown. + * @author Ingo Proetel (proetel@aicas.com) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Jeroen Frijters (jeroen@frijters.net) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.1 + */ +public final class Naming { + + /** + * This class isn't intended to be instantiated. + */ + private Naming() {} + +/** + * Looks for the remote object that is associated with the named service. + * Name and location is given in form of a URL without a scheme: + * + * <pre> + * //host:port/service-name + * </pre> + * + * The port is optional. + * + * @param name the service name and location + * @return Remote-object that implements the named service + * @throws NotBoundException if no object implements the service + * @throws MalformedURLException + * @throws RemoteException + */ +public static Remote lookup(String name) throws NotBoundException, MalformedURLException, RemoteException { + URL u = parseURL(name); + String serviceName = getName(u); + return (getRegistry(u).lookup(serviceName)); +} + +/** + * Try to bind the given object to the given service name. + * @param name + * @param obj + * @throws AlreadyBoundException + * @throws MalformedURLException + * @throws RemoteException + */ +public static void bind(String name, Remote obj) throws AlreadyBoundException, MalformedURLException, RemoteException { + URL u = parseURL(name); + String serviceName = getName(u); + getRegistry(u).bind(serviceName, obj); +} + +/** + * Remove a binding for a given service name. + * @param name + * @throws RemoteException + * @throws NotBoundException + * @throws MalformedURLException + */ +public static void unbind(String name) throws RemoteException, NotBoundException, MalformedURLException { + URL u = parseURL(name); + String serviceName = getName(u); + getRegistry(u).unbind(serviceName); +} + +/** + * Forces the binding between the given Remote-object and the given service name, even + * if there was already an object bound to this name. + * @param name + * @param obj + * @throws RemoteException + * @throws MalformedURLException + */ +public static void rebind(String name, Remote obj) throws RemoteException, MalformedURLException { + URL u = parseURL(name); + String serviceName = getName(u); + getRegistry(u).rebind(serviceName, obj); +} + +/** + * Lists all services at the named registry. + * @param name url that specifies the registry + * @return list of services at the name registry + * @throws RemoteException + * @throws MalformedURLException + */ +public static String[] list(String name) throws RemoteException, MalformedURLException { + return (getRegistry(parseURL(name)).list()); +} + +private static Registry getRegistry(URL u) throws RemoteException { + if (u.getPort() == -1) { + return (LocateRegistry.getRegistry(u.getHost())); + } + else { + return (LocateRegistry.getRegistry(u.getHost(), u.getPort())); + } +} + + /** + * Parses the supplied URL and converts it to use the HTTP + * protocol. From an RMI perspective, the scheme is irrelevant + * and we want to be able to create a URL for which a handler is + * available. + * + * @param name the URL in String form. + * @throws MalformedURLException if the URL is invalid. + */ + private static URL parseURL(String name) + throws MalformedURLException + { + try + { + URI uri = new URI(name); + String host = uri.getHost(); + int port = uri.getPort(); + String query = uri.getQuery(); + String path = uri.getPath(); + return new URL("http", + (host == null ? "localhost" : host), + (port == -1 ? 1099 : port), + uri.getPath() + (query == null ? "" : query)); + } + catch (URISyntaxException e) + { + throw new MalformedURLException("The URL syntax was invalid: " + + e.getMessage()); + } + } + + /** + * Checks that the URL contains a name, and removes any leading + * slashes. + * + * @param url the URL to check. + * @throws MalformedURLException if no name is specified. + */ + private static String getName(URL url) + throws MalformedURLException + { + String filename = url.getFile(); + if (filename.length() == 0) + throw new MalformedURLException("No path specified: " + url); + // If the filename begins with a slash we must cut it for + // name resolution. + if (filename.charAt(0) == '/') + return filename.substring(1); + return filename; + } + +} |