| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| package org.apache.directory.server.core.partition.ldif; |
| |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.UUID; |
| |
| import javax.naming.InvalidNameException; |
| |
| import org.apache.directory.server.core.api.interceptor.context.AddOperationContext; |
| import org.apache.directory.server.core.api.partition.index.IndexCursor; |
| import org.apache.directory.server.core.api.partition.index.IndexEntry; |
| import org.apache.directory.server.core.shared.partition.OperationExecutionManagerFactory; |
| import org.apache.directory.server.core.shared.txn.TxnManagerFactory; |
| import org.apache.directory.server.i18n.I18n; |
| import org.apache.directory.shared.ldap.model.constants.SchemaConstants; |
| import org.apache.directory.shared.ldap.model.entry.DefaultEntry; |
| import org.apache.directory.shared.ldap.model.entry.Entry; |
| import org.apache.directory.shared.ldap.model.exception.LdapException; |
| import org.apache.directory.shared.ldap.model.exception.LdapInvalidDnException; |
| import org.apache.directory.shared.ldap.model.ldif.LdifEntry; |
| import org.apache.directory.shared.ldap.model.ldif.LdifReader; |
| import org.apache.directory.shared.ldap.model.ldif.LdifUtils; |
| import org.apache.directory.shared.ldap.model.schema.SchemaManager; |
| import org.apache.directory.shared.util.Strings; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A Partition implementation backed by a single LDIF file. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class SingleFileLdifPartition extends AbstractLdifPartition |
| { |
| /** the LDIF file holding the partition's data */ |
| private File partitionFile; |
| |
| /** Shadow File */ |
| private String ldifShadowFile; |
| |
| /** flag to enable/disable re-writing in-memory partition data back to file, default is set to true */ |
| private volatile boolean enableRewriting = true; |
| |
| /** flag used internally to detect if partition data was updated in memory but not on disk */ |
| private boolean dirty = false; |
| |
| /** lock for serializing the operations on the backing LDIF file */ |
| private Object lock = new Object(); |
| |
| private static Logger LOG = LoggerFactory.getLogger( SingleFileLdifPartition.class ); |
| |
| |
| /** |
| * Creates a new instance of SingleFileLdifPartition. |
| */ |
| public SingleFileLdifPartition( SchemaManager schemaManager, TxnManagerFactory txnManagerFactory, |
| OperationExecutionManagerFactory executionManagerFactory ) |
| { |
| super( schemaManager, txnManagerFactory, executionManagerFactory ); |
| } |
| |
| |
| @Override |
| protected void doInit() throws InvalidNameException, Exception |
| { |
| if ( !initialized ) |
| { |
| if ( getPartitionPath() == null ) |
| { |
| throw new IllegalArgumentException( "Partition path cannot be null" ); |
| } |
| |
| partitionFile = new File( getPartitionPath() ); |
| |
| if ( partitionFile.exists() && !partitionFile.isFile() ) |
| { |
| throw new IllegalArgumentException( "Partition path must be a LDIF file" ); |
| } |
| |
| ldifShadowFile = partitionFile.getPath() + CONF_SHADOW_FILE_EXTN; |
| |
| LOG.debug( "id is : {}", getId() ); |
| |
| // Initialize the suffixDirectory : it's a composition |
| // of the workingDirectory followed by the suffix |
| if ( ( suffixDn == null ) || ( suffixDn.isEmpty() ) ) |
| { |
| String msg = I18n.err( I18n.ERR_150 ); |
| LOG.error( msg ); |
| throw new LdapInvalidDnException( msg ); |
| } |
| |
| if ( !suffixDn.isSchemaAware() ) |
| { |
| suffixDn.apply( schemaManager ); |
| } |
| |
| super.doInit(); |
| |
| loadEntries(); |
| } |
| } |
| |
| |
| /** |
| * load the entries from the LDIF file if present |
| * @throws Exception |
| */ |
| private void loadEntries() throws Exception |
| { |
| RandomAccessLdifReader parser = new RandomAccessLdifReader(); |
| |
| Iterator<LdifEntry> itr = parser.iterator(); |
| |
| if ( !itr.hasNext() ) |
| { |
| return; |
| } |
| |
| LdifEntry ldifEntry = itr.next(); |
| |
| Entry contextEntry = new DefaultEntry( schemaManager, ldifEntry.getEntry() ); |
| |
| if ( suffixDn.equals( contextEntry.getDn() ) ) |
| { |
| addMandatoryOpAt( contextEntry ); |
| |
| AddOperationContext addContext = new AddOperationContext( schemaManager, contextEntry ); |
| executionManager.add( this, addContext ); |
| } |
| else |
| { |
| throw new LdapException( "The given LDIF file doesn't contain the context entry" ); |
| } |
| |
| while ( itr.hasNext() ) |
| { |
| ldifEntry = itr.next(); |
| |
| Entry entry = new DefaultEntry( schemaManager, ldifEntry.getEntry() ); |
| |
| addMandatoryOpAt( entry ); |
| |
| AddOperationContext addContext = new AddOperationContext( schemaManager, entry ); |
| executionManager.add( this, addContext ); |
| } |
| |
| parser.close(); |
| } |
| |
| |
| //--------------------------------------------------------------------------------------------- |
| // Operations |
| //--------------------------------------------------------------------------------------------- |
| |
| /** |
| * writes the partition's data to the file if {@link #enableRewriting} is set to true |
| * and partition was modified since the last write or {@link #dirty} data. |
| * |
| * @throws LdapException |
| */ |
| private void rewritePartitionData() throws LdapException |
| { |
| synchronized ( lock ) |
| { |
| |
| RandomAccessFile ldifFile = null; |
| IndexCursor<UUID> cursor = null; |
| |
| try |
| { |
| File shadowFile = new File( ldifShadowFile ); |
| |
| if ( shadowFile.exists() == false ) |
| { |
| if ( shadowFile.createNewFile() == false ) |
| { |
| throw new LdapException( "SingleFileLdifPartition: failed to create shadow file" ); |
| } |
| } |
| |
| ldifFile = new RandomAccessFile( shadowFile, "rw" ); |
| ldifFile.setLength( 0 ); // wipe the file clean |
| |
| UUID suffixId = getEntryId( suffixDn ); |
| |
| if ( suffixId == null ) |
| { |
| return; |
| } |
| |
| cursor = getOneLevelIndex().forwardCursor( suffixId ); |
| |
| appendLdif( lookup( suffixId ), ldifFile ); |
| |
| while ( cursor.next() ) |
| { |
| UUID childId = cursor.get().getId(); |
| |
| Entry entry = lookup( childId ); |
| |
| appendLdif( entry, ldifFile ); |
| |
| appendRecursive( childId, null, ldifFile ); |
| } |
| |
| // Finally rename to the partition file |
| boolean succeeded = shadowFile.renameTo( partitionFile ); |
| |
| if ( succeeded == false ) |
| { |
| throw new LdapException( "SingleFileLdifPartition: reanme of shadow file to partition file failed" ); |
| } |
| |
| } |
| catch ( LdapException e ) |
| { |
| throw e; |
| } |
| catch ( Exception e ) |
| { |
| throw new LdapException( e ); |
| } |
| finally |
| { |
| try |
| { |
| if ( ldifFile != null ) |
| { |
| ldifFile.close(); |
| } |
| |
| if ( cursor != null ) |
| { |
| cursor.close(); |
| } |
| } |
| catch ( Exception e ) |
| { |
| throw new LdapException( e ); |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * appends all the entries present under a given entry, recursively |
| * |
| * @param entryId the base entry's id |
| * @param cursorMap the open cursor map |
| * @throws Exception |
| */ |
| private void appendRecursive( UUID entryId, Map<UUID, IndexCursor<UUID>> cursorMap, RandomAccessFile ldifFile ) |
| throws Exception |
| { |
| synchronized ( lock ) |
| { |
| |
| IndexCursor<UUID> cursor = null; |
| if ( cursorMap == null ) |
| { |
| cursorMap = new HashMap<UUID, IndexCursor<UUID>>(); |
| } |
| |
| cursor = cursorMap.get( entryId ); |
| |
| if ( cursor == null ) |
| { |
| cursor = getOneLevelIndex().forwardCursor( entryId ); |
| cursor.beforeFirst(); |
| cursorMap.put( entryId, cursor ); |
| } |
| |
| if ( !cursor.next() ) // if this is a leaf entry's Dn |
| { |
| cursorMap.remove( entryId ); |
| cursor.close(); |
| } |
| else |
| { |
| do |
| { |
| IndexEntry<UUID> idxEntry = cursor.get(); |
| Entry entry = lookup( idxEntry.getId() ); |
| |
| UUID childId = getEntryId( entry.getDn() ); |
| |
| appendLdif( entry, ldifFile ); |
| |
| appendRecursive( childId, cursorMap, ldifFile ); |
| } |
| while ( cursor.next() ); |
| cursorMap.remove( entryId ); |
| cursor.close(); |
| } |
| } |
| } |
| |
| |
| /** |
| * append data to the LDIF file |
| * |
| * @param entry the entry to be written |
| * @throws LdapException |
| */ |
| private void appendLdif( Entry entry, RandomAccessFile ldifFile ) throws IOException, LdapException |
| { |
| synchronized ( lock ) |
| { |
| String ldif = LdifUtils.convertToLdif( entry ); |
| ldifFile.write( Strings.getBytesUtf8( ldif + "\n" ) ); |
| } |
| } |
| |
| /** |
| * an LdifReader backed by a RandomAccessFile |
| */ |
| private class RandomAccessLdifReader extends LdifReader |
| { |
| private long len; |
| |
| RandomAccessFile ldifFile; |
| |
| |
| public RandomAccessLdifReader() throws LdapException |
| { |
| try |
| { |
| ldifFile = new RandomAccessFile( partitionFile, "rw" ); |
| } |
| catch ( FileNotFoundException e ) |
| { |
| throw new LdapException( e.getMessage(), e ); |
| } |
| |
| try |
| { |
| len = ldifFile.length(); |
| super.init(); |
| } |
| catch ( IOException e ) |
| { |
| LdapException le = new LdapException( e.getMessage(), e ); |
| le.initCause( e ); |
| |
| throw le; |
| } |
| } |
| |
| |
| @Override |
| protected String getLine() throws IOException |
| { |
| if ( len == 0 ) |
| { |
| return null; |
| } |
| |
| return ldifFile.readLine(); |
| } |
| |
| |
| @Override |
| public void close() throws IOException |
| { |
| if ( ldifFile != null ) |
| { |
| ldifFile.close(); |
| } |
| |
| super.close(); |
| } |
| } |
| |
| |
| /** |
| * add the CSN and UUID attributes to the entry if they are not present |
| */ |
| private void addMandatoryOpAt( Entry entry ) throws LdapException |
| { |
| if ( entry.get( SchemaConstants.ENTRY_CSN_AT ) == null ) |
| { |
| entry.add( SchemaConstants.ENTRY_CSN_AT, defaultCSNFactory.newInstance().toString() ); |
| } |
| |
| if ( entry.get( SchemaConstants.ENTRY_UUID_AT ) == null ) |
| { |
| String uuid = UUID.randomUUID().toString(); |
| entry.add( SchemaConstants.ENTRY_UUID_AT, uuid ); |
| } |
| } |
| |
| |
| /** |
| * enable/disable the re-writing of partition data. |
| * This method internally calls the @see {@link #rewritePartitionData()} to save any dirty data if present |
| * |
| * @param enableRewriting flag to enable/disable re-writing |
| * @throws LdapException |
| */ |
| public void setEnableRewriting( boolean enableRewriting ) throws LdapException |
| { |
| this.enableRewriting = enableRewriting; |
| |
| // save data if found dirty |
| rewritePartitionData(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void sync() throws Exception |
| { |
| rewritePartitionData(); |
| } |
| |
| } |