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https://github.com/Alfresco/alfresco-community-repo.git
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e6b0bb96fb
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5567 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
316 lines
11 KiB
Java
316 lines
11 KiB
Java
/*
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* Copyright (C) 2005-2007 Alfresco Software Limited.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* As a special exception to the terms and conditions of version 2.0 of
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* the GPL, you may redistribute this Program in connection with Free/Libre
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* and Open Source Software ("FLOSS") applications as described in Alfresco's
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* FLOSS exception. You should have recieved a copy of the text describing
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* the FLOSS exception, and it is also available here:
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* http://www.alfresco.com/legal/licensing
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*/
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package org.alfresco.repo.avm.locking;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import org.alfresco.repo.attributes.Attribute;
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import org.alfresco.repo.attributes.ListAttributeValue;
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import org.alfresco.repo.attributes.MapAttributeValue;
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import org.alfresco.repo.attributes.StringAttributeValue;
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import org.alfresco.repo.transaction.RetryingTransactionHelper;
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import org.alfresco.repo.transaction.RetryingTransactionHelper.Callback;
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import org.alfresco.service.cmr.attributes.AttrQueryEquals;
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import org.alfresco.service.cmr.attributes.AttributeService;
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import org.alfresco.service.cmr.avm.AVMExistsException;
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import org.alfresco.service.cmr.avm.AVMNotFoundException;
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import org.alfresco.service.cmr.avm.locking.AVMLock;
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import org.alfresco.service.cmr.avm.locking.AVMLockingService;
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import org.alfresco.util.MD5;
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import org.alfresco.util.Pair;
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/**
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* Implementation of the lock service.
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* @author britt
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*/
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public class AVMLockingServiceImpl implements AVMLockingService
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{
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public static final String LOCK_TABLE = ".avm_lock_table";
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public static final String WEB_PROJECTS = "web_projects";
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public static final String USERS = "users";
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/**
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* AttributeService reference.
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*/
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private AttributeService fAttributeService;
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/**
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* Transaction Helper reference.
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*/
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private RetryingTransactionHelper fRetryingTransactionHelper;
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public AVMLockingServiceImpl()
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{
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}
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/**
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* Setter for AttributeService reference.
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* @param service
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*/
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public void setAttributeService(AttributeService service)
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{
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fAttributeService = service;
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}
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/**
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* Setter for RetryingTransactionHelper reference.
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* @param helper
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*/
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public void setRetryingTransactionHelper(RetryingTransactionHelper helper)
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{
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fRetryingTransactionHelper = helper;
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}
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public void init()
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{
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Callback callback = new Callback()
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{
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public Object execute()
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{
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Attribute table = fAttributeService.getAttribute(LOCK_TABLE);
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if (table != null)
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{
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return null;
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}
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fAttributeService.setAttribute("", LOCK_TABLE, new MapAttributeValue());
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fAttributeService.setAttribute(LOCK_TABLE, WEB_PROJECTS, new MapAttributeValue());
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fAttributeService.setAttribute(LOCK_TABLE, USERS, new MapAttributeValue());
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return null;
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}
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};
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fRetryingTransactionHelper.doInTransaction(callback, false);
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#getLock(java.lang.String, java.lang.String)
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*/
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public AVMLock getLock(String webProject, String path)
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{
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path = normalizePath(path);
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List<String> keys = new ArrayList<String>();
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keys.add(LOCK_TABLE);
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keys.add(WEB_PROJECTS);
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keys.add(webProject);
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List<Pair<String, Attribute>> attrs =
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fAttributeService.query(keys, new AttrQueryEquals(MD5.Digest(path.getBytes())));
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if (attrs.size() == 0)
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{
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return null;
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}
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return new AVMLock(attrs.get(0).getSecond());
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}
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/**
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* Utility to get relative paths into canonical form.
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* @param path The incoming path.
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* @return The normalized path.
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*/
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private String normalizePath(String path)
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{
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while (path.startsWith("/"))
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{
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path = path.substring(1);
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}
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while (path.endsWith("/"))
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{
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path = path.substring(0, path.length() - 1);
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}
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return path.replaceAll("/+", "/");
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#getUsersLocks(java.lang.String)
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*/
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public List<AVMLock> getUsersLocks(String user)
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{
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List<String> keys = new ArrayList<String>();
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keys.add(LOCK_TABLE);
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keys.add(USERS);
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keys.add(user);
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Attribute userLocks = fAttributeService.getAttribute(keys);
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List<AVMLock> locks = new ArrayList<AVMLock>();
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if (userLocks == null)
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{
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return locks;
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}
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for (Attribute entry : userLocks)
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{
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String webProject = entry.get("web_project").getStringValue();
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String path = entry.get("path").getStringValue();
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locks.add(getLock(webProject, path));
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}
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return locks;
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#lockPath(org.alfresco.service.cmr.avm.locking.AVMLock)
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*/
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public void lockPath(AVMLock lock)
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{
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List<String> keys = new ArrayList<String>();
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Attribute lockData = lock.getAttribute();
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keys.add(LOCK_TABLE);
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keys.add(WEB_PROJECTS);
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keys.add(lock.getWebProject());
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if (fAttributeService.getAttribute(keys) == null)
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{
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throw new AVMExistsException("Lock Exists: " + keys);
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}
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fAttributeService.setAttribute(keys, MD5.Digest(lock.getPath().getBytes()), lockData);
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keys.clear();
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keys.add(LOCK_TABLE);
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keys.add(USERS);
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for (String user : lock.getOwners())
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{
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keys.add(user);
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Attribute userEntry = fAttributeService.getAttribute(keys);
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keys.remove(2);
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if (userEntry == null)
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{
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fAttributeService.setAttribute(keys, user, new ListAttributeValue());
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}
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keys.add(user);
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Attribute entry = new MapAttributeValue();
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entry.put("web_project", new StringAttributeValue(lock.getWebProject()));
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entry.put("path", new StringAttributeValue(lock.getPath()));
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fAttributeService.addAttribute(keys, entry);
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keys.remove(2);
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}
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#removeLock(java.lang.String, java.lang.String)
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*/
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public void removeLock(String webProject, String path)
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{
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path = normalizePath(path);
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String pathKey = MD5.Digest(path.getBytes());
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List<String> keys = new ArrayList<String>();
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keys.add(LOCK_TABLE);
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keys.add(WEB_PROJECTS);
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keys.add(webProject);
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keys.add(pathKey);
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Attribute lockData = fAttributeService.getAttribute(keys);
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if (lockData == null)
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{
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throw new AVMNotFoundException("Lock does not exist: " + webProject + " " + path);
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}
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keys.remove(3);
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fAttributeService.removeAttribute(keys, pathKey);
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AVMLock lock = new AVMLock(lockData);
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List<String> userKeys = new ArrayList<String>();
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userKeys.add(LOCK_TABLE);
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userKeys.add(USERS);
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for (String user : lock.getOwners())
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{
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userKeys.add(user);
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Attribute userLocks = fAttributeService.getAttribute(userKeys);
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for (int i = 0; i < userLocks.size(); i++)
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{
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Attribute lockInfo = userLocks.get(i);
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if (lockInfo.get("web_project").getStringValue().equals(lock.getWebProject())
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&& lockInfo.get("path").getStringValue().equals(lock.getPath()))
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{
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fAttributeService.removeAttribute(userKeys, i);
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break;
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}
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}
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userKeys.remove(2);
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}
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#addWebProject(java.lang.String)
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*/
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public void addWebProject(String webProject)
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{
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List<String> keys = new ArrayList<String>();
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keys.add(LOCK_TABLE);
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keys.add(WEB_PROJECTS);
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keys.add(webProject);
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if (fAttributeService.getAttribute(keys) != null)
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{
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throw new AVMExistsException("Web Project Exists: " + webProject);
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}
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keys.remove(2);
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fAttributeService.setAttribute(keys, webProject, new MapAttributeValue());
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#getWebProjectLocks(java.lang.String)
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*/
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public List<AVMLock> getWebProjectLocks(String webProject)
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{
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List<String> keys = new ArrayList<String>();
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keys.add(LOCK_TABLE);
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keys.add(WEB_PROJECTS);
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keys.add(webProject);
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Attribute locksMap = fAttributeService.getAttribute(keys);
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List<AVMLock> result = new ArrayList<AVMLock>();
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if (locksMap != null)
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{
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for (Attribute lockData : locksMap.values())
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{
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result.add(new AVMLock(lockData));
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}
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}
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return result;
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}
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/* (non-Javadoc)
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* @see org.alfresco.service.cmr.avm.locking.AVMLockingService#removeWebProject(java.lang.String)
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*/
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public void removeWebProject(String webProject)
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{
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List<String> userKeys = new ArrayList<String>();
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userKeys.add(LOCK_TABLE);
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userKeys.add(USERS);
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List<String> users = fAttributeService.getKeys(userKeys);
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for (String user : users)
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{
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userKeys.add(user);
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Attribute userLocks = fAttributeService.getAttribute(userKeys);
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Iterator<Attribute> iter = userLocks.iterator();
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while (iter.hasNext())
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{
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Attribute lockInfo = iter.next();
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if (lockInfo.get("web_project").getStringValue().equals(webProject))
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{
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iter.remove();
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}
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}
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userKeys.remove(2);
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fAttributeService.setAttribute(userKeys, user, userLocks);
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}
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List<String> keys = new ArrayList<String>();
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keys.add(LOCK_TABLE);
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keys.add(WEB_PROJECTS);
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fAttributeService.removeAttribute(keys, webProject);
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}
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}
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