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author | Andrew John Hughes <gnu_andrew@member.fsf.org> | 2006-10-05 02:44:18 +0000 |
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committer | Andrew John Hughes <gnu_andrew@member.fsf.org> | 2006-10-05 02:44:18 +0000 |
commit | 2799793789d5b66c90efbd1a3eb56e0c1ec57f88 (patch) | |
tree | 9157197f502b6830af9cafe029fd3d47628a7ed6 /tools/gnu/classpath/tools/orbd/PersistentContext.java | |
parent | 7516107c5abe26f7a4378017344eb9e449ebc28e (diff) | |
download | classpath-2799793789d5b66c90efbd1a3eb56e0c1ec57f88.tar.gz |
2006-10-05 Andrew John Hughes <gnu_andrew@member.fsf.org>
* Merge of HEAD-->generics for 2006/09/03-2006/10/04.
Diffstat (limited to 'tools/gnu/classpath/tools/orbd/PersistentContext.java')
-rw-r--r-- | tools/gnu/classpath/tools/orbd/PersistentContext.java | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/tools/gnu/classpath/tools/orbd/PersistentContext.java b/tools/gnu/classpath/tools/orbd/PersistentContext.java new file mode 100644 index 000000000..9b4f27a3d --- /dev/null +++ b/tools/gnu/classpath/tools/orbd/PersistentContext.java @@ -0,0 +1,152 @@ +/* PersistentContext.java -- The persistent naming context. + Copyright (C) 2006 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 gnu.classpath.tools.orbd; + +import gnu.CORBA.NamingService.NameTransformer; +import gnu.CORBA.NamingService.TransientContext; + +import java.io.File; + +import org.omg.CORBA.ORB; +import org.omg.CosNaming.NameComponent; +import org.omg.CosNaming.NamingContext; +import org.omg.CosNaming.NamingContextPackage.AlreadyBound; +import org.omg.CosNaming.NamingContextPackage.CannotProceed; +import org.omg.CosNaming.NamingContextPackage.InvalidName; +import org.omg.CosNaming.NamingContextPackage.NotFound; + +/** + * This class implements the persistent naming service, defined by + * {@link NamingContext}. The 'persistent' means that the service remembers the + * mappings, stored between restarts. + * + * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) + */ +public class PersistentContext + extends TransientContext +{ + /** + * Use serial version UID for interoperability. + */ + private static final long serialVersionUID = 2; + + /** + * The folder, where the persistent context information is stored. + */ + File contextFolder; + + /** + * The uinque context identifier. + */ + static long num = System.currentTimeMillis(); + + /** + * The naming service orb. + */ + ORB orb; + + /** + * Create the persistent naming context that will store the files in the given + * folder of the local file system. This method also connects object to the + * passed ORB. + * + * @param an_orb the naming service ORB, used to obtain and produce the object + * stringified references. + * @param folder the folder, where the persistent information is stored. + * @param reset if true, the previous naming data are discarded. If false + * (normally expected), they are loaded from the persistent memory to + * provide the persistence. + */ + public PersistentContext(ORB an_orb, File folder, boolean reset) + { + super( + new PersistentContextMap(an_orb, new File(folder, "contexts.txt"), reset), + new PersistentMap(an_orb, new File(folder, "objects.txt"), reset)); + contextFolder = folder; + folder.mkdirs(); + orb = an_orb; + orb.connect(this); + } + + /** + * Get the unique context number; + * + * @return the context number + */ + static synchronized String getNum() + { + return Long.toHexString(num++); + } + + /** + * Create new persistent context. + */ + public NamingContext new_context() + { + File ctxFolder = new File(contextFolder, "ctx_"+getNum()); + return new PersistentContext(orb, ctxFolder, true); + } + + /** + * Create a new context and give it a given name (bound it) in the current + * context. The method benefits from passing the better readable context name. + * + * @param a_name the name being given to the new context. + * @return the newly created context. + * @throws AlreadyBound if the name is already in use. + * @throws InvalidName if the name has zero length or otherwise invalid. + */ + public NamingContext bind_new_context(NameComponent[] a_name) + throws NotFound, AlreadyBound, CannotProceed, InvalidName + { + if (named_contexts.containsKey(a_name[0]) + || named_objects.containsKey(a_name[0])) + throw new AlreadyBound(); + + NameTransformer transformer = new NameTransformer(); + + File ctxFolder = new File(contextFolder, + transformer.toString(a_name).replace('/', '.') + + ".v" + getNum()); + + NamingContext child = new PersistentContext(orb, ctxFolder, true); + bind_context(a_name, child); + return child; + } +} |