mirror of
https://github.com/Alfresco/alfresco-community-repo.git
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f2c5192a7f
Fixes to AVM filesystem transaction handling. Made SrvSession.beginTransaction() private and added beginReadTransaction() and beginWriteTransaction(). git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4580 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
343 lines
11 KiB
Java
343 lines
11 KiB
Java
/*
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* Copyright (C) 2006 Alfresco, Inc.
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*
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* Licensed under the Mozilla Public License version 1.1
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* with a permitted attribution clause. You may obtain a
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* copy of the License at
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*
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* http://www.alfresco.org/legal/license.txt
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. See the License for the specific
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* language governing permissions and limitations under the
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* License.
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*/
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package org.alfresco.filesys.avm;
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import java.util.Enumeration;
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import org.alfresco.config.ConfigElement;
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import org.alfresco.filesys.server.SrvSession;
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import org.alfresco.filesys.server.auth.InvalidUserException;
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import org.alfresco.filesys.server.config.InvalidConfigurationException;
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import org.alfresco.filesys.server.config.ServerConfiguration;
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import org.alfresco.filesys.server.core.InvalidDeviceInterfaceException;
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import org.alfresco.filesys.server.core.ShareMapper;
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import org.alfresco.filesys.server.core.ShareType;
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import org.alfresco.filesys.server.core.SharedDevice;
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import org.alfresco.filesys.server.core.SharedDeviceList;
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import org.alfresco.filesys.server.filesys.DiskSharedDevice;
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import org.alfresco.filesys.util.StringList;
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import org.alfresco.service.cmr.avm.AVMNotFoundException;
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import org.alfresco.service.cmr.avm.AVMService;
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import org.alfresco.service.cmr.avm.AVMWrongTypeException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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* AVM Filesystem Share Mapper Class
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*
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* <p>Provides access to store versions using the share name '<storename>_<version>'.
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*
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* @author gkspencer
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*/
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public class AVMShareMapper implements ShareMapper {
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// Logging
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private static final Log logger = LogFactory.getLog("org.alfresco.smb.protocol");
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// Regular expression to test for AVM versioned share name
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private static final String AVM_SHAREPATTERN = "[a-zA-Z0-9-]*_[0-9]+";
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// Server configuration
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private ServerConfiguration m_config;
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// List of available AVM shares
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private StringList m_avmShareNames;
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// Debug enable flag
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private boolean m_debug;
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/**
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* Default constructor
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*/
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public AVMShareMapper()
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{
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}
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/**
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* Initialize the share mapper
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*
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* @param config ServerConfiguration
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* @param params ConfigElement
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* @exception InvalidConfigurationException
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*/
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public void initializeMapper(ServerConfiguration config, ConfigElement params) throws InvalidConfigurationException
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{
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// Save the server configuration
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m_config = config;
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// Check if debug is enabled
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if (params != null && params.getChild("debug") != null)
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m_debug = true;
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// Build the list of available AVM share names
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m_avmShareNames = new StringList();
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SharedDeviceList shrList = m_config.getShares();
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Enumeration<SharedDevice> shrEnum = shrList.enumerateShares();
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while ( shrEnum.hasMoreElements())
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{
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// Get the current shared device and check if it is an AVM filesystem device
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SharedDevice curShare = shrEnum.nextElement();
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try
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{
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if ( curShare.getInterface() instanceof AVMDiskDriver)
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m_avmShareNames.addString( curShare.getName());
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}
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catch ( InvalidDeviceInterfaceException ex)
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{
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}
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}
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}
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/**
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* Check if debug output is enabled
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*
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* @return boolean
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*/
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public final boolean hasDebug()
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{
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return m_debug;
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}
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/**
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* Return the list of available shares.
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*
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* @param host String
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* @param sess SrvSession
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* @param allShares boolean
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* @return SharedDeviceList
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*/
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public SharedDeviceList getShareList(String host, SrvSession sess, boolean allShares)
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{
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// Make a copy of the global share list and add the per session dynamic shares
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SharedDeviceList shrList = new SharedDeviceList(m_config.getShares());
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if ( sess != null && sess.hasDynamicShares()) {
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// Add the per session dynamic shares
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shrList.addShares(sess.getDynamicShareList());
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}
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// Remove unavailable shares from the list and return the list
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if ( allShares == false)
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shrList.removeUnavailableShares();
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return shrList;
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}
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/**
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* Find a share using the name and type for the specified client.
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*
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* @param host String
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* @param name String
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* @param typ int
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* @param sess SrvSession
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* @param create boolean
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* @return SharedDevice
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* @exception InvalidUserException
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*/
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public SharedDevice findShare(String tohost, String name, int typ, SrvSession sess, boolean create)
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throws Exception
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{
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// Find the required share by name/type. Use a case sensitive search first, if that fails use a case
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// insensitive search.
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SharedDevice share = m_config.getShares().findShare(name, typ, false);
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if ( share == null)
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{
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// Try a case insensitive search for the required share
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share = m_config.getShares().findShare(name, typ, true);
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}
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// If the share was not found then check if the share is in the AVM versioned share format - '<storename>_<version>'
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if ( share == null && ( typ == ShareType.DISK || typ == ShareType.UNKNOWN))
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{
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// Check if the share has already been created for the session
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if ( sess.hasDynamicShares())
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{
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// Check if the required share exists in the sessions dynamic share list
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share = sess.getDynamicShareList().findShare(name, typ, false);
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// DEBUG
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if ( logger.isDebugEnabled())
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logger.debug(" Reusing existing dynamic share for " + name);
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}
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// Check if the share name matches the AVM versioned share name pattern
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if ( share == null && create == true && name.matches( AVM_SHAREPATTERN))
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{
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// DEBUG
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if ( logger.isDebugEnabled())
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logger.debug("Map dynamic share " + name + ", type=" + ShareType.TypeAsString(typ));
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// Split the store name and version id from the share name
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int pos = name.indexOf( '_');
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String storePath = name.substring(0, pos) + ":/";
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int storeVersion = -1;
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try
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{
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String storeVer = name.substring( pos + 1);
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storeVersion = Integer.parseInt( storeVer);
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if ( storeVersion < 0)
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storeVersion = -1;
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}
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catch ( NumberFormatException ex)
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{
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logger.error( "Invalid store version id, name=" + name);
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}
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// Create the disk driver and context
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if ( storePath.length() > 0 && storeVersion != -1)
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{
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// Validate the store name and version
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AVMDiskDriver avmDrv = (AVMDiskDriver) m_config.getAvmDiskInterface();
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AVMService avmService = avmDrv.getAvmService();
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sess.beginReadTransaction( avmDrv.getTransactionService());
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try
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{
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// Validate the store name/version
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avmService.lookup( storeVersion, storePath);
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// Create a dynamic share mapped to the AVM store/version
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AVMContext avmCtx = new AVMContext( name, storePath, storeVersion);
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avmCtx.enableStateTable( true, avmDrv.getStateReaper());
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// Create a dynamic shared device for the store version
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DiskSharedDevice diskShare = new DiskSharedDevice( name, avmDrv, avmCtx, SharedDevice.Temporary);
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// Add the new share to the sessions dynamic share list
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sess.addDynamicShare(diskShare);
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share = diskShare;
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// DEBUG
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if (logger.isDebugEnabled())
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logger.debug(" Mapped share " + name + " - " + diskShare);
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}
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catch ( AVMNotFoundException ex)
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{
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// DEBUG
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if ( logger.isDebugEnabled())
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logger.debug( "Failed to map share to " + name + ", not such store/version");
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}
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catch ( AVMWrongTypeException ex)
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{
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// DEBUG
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if ( logger.isDebugEnabled())
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logger.debug( "Failed to map share to " + name + ", wrong type");
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}
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}
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}
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}
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// Check if the share is available
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if ( share != null && share.getContext() != null && share.getContext().isAvailable() == false)
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share = null;
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// Return the shared device, or null if no matching device was found
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return share;
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}
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/**
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* Delete temporary shares for the specified session
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*
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* @param sess SrvSession
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*/
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public void deleteShares(SrvSession sess)
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{
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// Check if the session has any dynamic shares
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if ( sess.hasDynamicShares() == false)
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return;
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// Delete the dynamic shares
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SharedDeviceList shares = sess.getDynamicShareList();
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Enumeration<SharedDevice> enm = shares.enumerateShares();
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while ( enm.hasMoreElements()) {
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// Get the current share from the list
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SharedDevice shr = (SharedDevice) enm.nextElement();
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// Close the shared device
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shr.getContext().CloseContext();
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// DEBUG
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if (logger.isDebugEnabled())
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logger.debug("Deleted dynamic share " + shr);
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}
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// Clear the dynamic share list
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shares.removeAllShares();
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}
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/**
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* Close the share mapper, release any resources.
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*/
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public void closeMapper()
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{
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// TODO Auto-generated method stub
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}
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}
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