From b787eb68f0dd8b23fe13c83a7ffd7d422b2ed9c3 Mon Sep 17 00:00:00 2001 From: Andrew Branson Date: Mon, 6 Oct 2014 12:10:48 +0200 Subject: Last Collection predef step - to create a numbered snapshot of the current state of the collection. Any further modification should be done by Admin using AddC2KObject --- .../predefined/CreateNewCollectionVersion.java | 102 +++++++++++++++++++++ .../predefined/PredefinedStepContainer.java | 1 + 2 files changed, 103 insertions(+) create mode 100644 src/main/java/com/c2kernel/lifecycle/instance/predefined/CreateNewCollectionVersion.java (limited to 'src/main/java') diff --git a/src/main/java/com/c2kernel/lifecycle/instance/predefined/CreateNewCollectionVersion.java b/src/main/java/com/c2kernel/lifecycle/instance/predefined/CreateNewCollectionVersion.java new file mode 100644 index 0000000..8e68ae3 --- /dev/null +++ b/src/main/java/com/c2kernel/lifecycle/instance/predefined/CreateNewCollectionVersion.java @@ -0,0 +1,102 @@ +/** + * This file is part of the CRISTAL-iSE kernel. + * Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved. + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published + * by the Free Software Foundation; either version 3 of the License, or (at + * your option) any later version. + * + * This library is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * http://www.fsf.org/licensing/licenses/lgpl.html + */ +package com.c2kernel.lifecycle.instance.predefined; + + +import java.util.Arrays; + +import com.c2kernel.collection.Collection; +import com.c2kernel.common.InvalidDataException; +import com.c2kernel.common.ObjectNotFoundException; +import com.c2kernel.common.PersistencyException; +import com.c2kernel.lookup.AgentPath; +import com.c2kernel.lookup.ItemPath; +import com.c2kernel.persistency.ClusterStorage; +import com.c2kernel.process.Gateway; +import com.c2kernel.utils.Logger; + +/************************************************************************** + * + * @author $Author: abranson $ $Date: 2004/10/21 08:02:19 $ + * @version $Revision: 1.8 $ + **************************************************************************/ +public class CreateNewCollectionVersion extends PredefinedStep +{ + /************************************************************************** + * Constructor for Castor + **************************************************************************/ + public CreateNewCollectionVersion() + { + super(); + } + + + /** + * Generates a new snapshot of a collection from its current state. The + * new version is given the next available number, starting at 0. + * + * Params: + * 0 - Collection name + * @throws InvalidDataException + * @throws PersistencyException + * + * @throws ObjectNotFoundException when there is no collection present with + * that name + */ + @Override + protected String runActivityLogic(AgentPath agent, ItemPath item, + int transitionID, String requestData) throws InvalidDataException, PersistencyException, ObjectNotFoundException + { + String collName; + + // extract parameters + String[] params = getDataList(requestData); + if (Logger.doLog(3)) Logger.msg(3, "CreateNewCollectionVersion: called by "+agent+" on "+item+" with parameters "+Arrays.toString(params)); + if (params.length != 1) + throw new InvalidDataException("CreateNewCollectionVersion: Invalid parameters "+Arrays.toString(params)); + + collName = params[0]; + Collection coll = (Collection)Gateway.getStorage().get(item, ClusterStorage.COLLECTION+"/"+collName+"/last", null); + + // find last numbered version + int lastVer = -1; + String[] versions = Gateway.getStorage().getClusterContents(item, ClusterStorage.COLLECTION+"/"+collName); + for (String thisVerStr : versions) { + try { + int thisVer = Integer.parseInt(thisVerStr); + if (thisVer > lastVer) lastVer = thisVer; + } catch (NumberFormatException ex) { } // ignore non-integer versions + } + + // Remove it from the cache before we change it + Gateway.getStorage().clearCache(item, ClusterStorage.COLLECTION+"/"+collName+"/last"); + // Set the version + coll.setVersion(lastVer+1); + + // store it + try { + Gateway.getStorage().put(item, coll, null); + } catch (PersistencyException e) { + throw new PersistencyException("CreateNewCollectionVersion: Error saving new collection '"+collName+"': "+e.getMessage()); + } + return requestData; + } +} diff --git a/src/main/java/com/c2kernel/lifecycle/instance/predefined/PredefinedStepContainer.java b/src/main/java/com/c2kernel/lifecycle/instance/predefined/PredefinedStepContainer.java index abf625c..e1f9ffc 100644 --- a/src/main/java/com/c2kernel/lifecycle/instance/predefined/PredefinedStepContainer.java +++ b/src/main/java/com/c2kernel/lifecycle/instance/predefined/PredefinedStepContainer.java @@ -42,6 +42,7 @@ public abstract class PredefinedStepContainer extends CompositeActivity predInit("WriteProperty", "Writes a property to the Item", new WriteProperty()); predInit("WriteViewpoint", "Writes a viewpoint to the Item", new WriteViewpoint()); predInit("AddNewCollectionDescription", "Creates a new collection description in this Item", new AddNewCollectionDescription()); + predInit("CreateNewCollectionVersion", "Creates a new numbered collection version in this Item from the current one.", new CreateNewCollectionVersion()); predInit("AddNewSlot", "Creates a new slot in the given aggregation, that holds instances of the item description of the given key", new AddNewSlot()); predInit("AssignItemToSlot", "Assigns the referenced entity to a pre-existing slot in an aggregation", new AssignItemToSlot()); predInit("ClearSlot", "Clears an aggregation member slot, given a slot no or entity key", new ClearSlot()); -- cgit v1.2.3