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From "Alex Karasulu" <akaras...@apache.org>
Subject Re: svn commit: r687555 - in /directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap: ./ handlers/
Date Fri, 22 Aug 2008 00:05:09 GMT
Sure will do that if power stays on long enough.  Power cut out while I was
working on this yesterday.

On Thu, Aug 21, 2008 at 8:44 AM, Emmanuel Lecharny <elecharny@gmail.com>wrote:

> Hi Alex,
>
> can you add the minimum Javadoc needed for the public methods and for the
> fields of the SearchTimeLimitingMonitor class ?
>
> Thanks !
>
> akarasulu@apache.org wrote:
>
>> Author: akarasulu
>> Date: Wed Aug 20 21:38:50 2008
>> New Revision: 687555
>>
>> URL: http://svn.apache.org/viewvc?rev=687555&view=rev
>> Log:
>> implemented search size limits handling using Cursor ClosureMonitor
>> technique and added abandon handling
>>
>> Added:
>>
>>  directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchAbandonListener.java
>>
>>  directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchTimeLimitingMonitor.java
>> Modified:
>>
>>  directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/LdapServer.java
>>
>>  directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/LdapRequestHandler.java
>>
>>  directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchHandler.java
>>
>> Modified:
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/LdapServer.java
>> URL:
>> http://svn.apache.org/viewvc/directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/LdapServer.java?rev=687555&r1=687554&r2=687555&view=diff
>>
>> ==============================================================================
>> ---
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/LdapServer.java
>> (original)
>> +++
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/LdapServer.java
>> Wed Aug 20 21:38:50 2008
>> @@ -120,6 +120,12 @@
>>     /** The default maximum time limit. */
>>     private static final int MAX_TIME_LIMIT_DEFAULT = 10000;
>>  +    /** Value (0) for configuration where size limit is unlimited. */
>> +    public static final int NO_SIZE_LIMIT = 0;
>> +
>> +    /** Value (0) for configuration where time limit is unlimited. */
>> +    public static final int NO_TIME_LIMIT = 0;
>> +
>>     /** The default service pid. */
>>     private static final String SERVICE_PID_DEFAULT =
>> "org.apache.directory.server.ldap";
>>
>> Modified:
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/LdapRequestHandler.java
>> URL:
>> http://svn.apache.org/viewvc/directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/LdapRequestHandler.java?rev=687555&r1=687554&r2=687555&view=diff
>>
>> ==============================================================================
>> ---
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/LdapRequestHandler.java
>> (original)
>> +++
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/LdapRequestHandler.java
>> Wed Aug 20 21:38:50 2008
>> @@ -117,6 +117,10 @@
>>     public final void messageReceived( IoSession session, T message )
>> throws Exception
>>     {
>>         LdapSession ldapSession = ldapServer.getLdapSession( session );
>> +        +        // TODO - session you get from LdapServer should have
>> the ldapServer +        // member already set no?  Should remove these lines
>> where ever they
>> +        // may be if that's the case.
>>         ldapSession.setLdapServer( ldapServer );
>>                 // protect against insecure conns when confidentiality is
>> required
>> Added:
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchAbandonListener.java
>> URL:
>> http://svn.apache.org/viewvc/directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchAbandonListener.java?rev=687555&view=auto
>>
>> ==============================================================================
>> ---
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchAbandonListener.java
>> (added)
>> +++
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchAbandonListener.java
>> Wed Aug 20 21:38:50 2008
>> @@ -0,0 +1,102 @@
>> +/*
>> + *   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.ldap.handlers;
>> +
>> +
>> +import org.apache.directory.server.core.event.DirectoryListener;
>> +import org.apache.directory.server.core.filtering.EntryFilteringCursor;
>> +import org.apache.directory.server.ldap.LdapServer;
>> +import
>> org.apache.directory.shared.ldap.exception.OperationAbandonedException;
>> +import org.apache.directory.shared.ldap.message.AbandonListener;
>> +import org.apache.directory.shared.ldap.message.AbandonableRequest;
>> +import org.slf4j.Logger;
>> +import org.slf4j.LoggerFactory;
>> +
>> +
>> +/**
>> + * An AbandonListener implementation which closes an associated cursor or
>> + * removes a DirectoryListener.
>> + *
>> + * @author <a href="mailto:dev@directory.apache.org">Apache Directory
>> Project</a>
>> + * @version $Rev$, $Date$
>> + */
>> +public class SearchAbandonListener implements AbandonListener
>> +{
>> +    private static final Logger LOG = LoggerFactory.getLogger(
>> SearchAbandonListener.class );
>> +    private final LdapServer ldapServer;
>> +    private EntryFilteringCursor cursor;
>> +    private DirectoryListener listener;
>> +    +    +    public SearchAbandonListener( LdapServer ldapServer,
>> EntryFilteringCursor cursor, DirectoryListener listener )
>> +    {
>> +        if ( ldapServer == null )
>> +        {
>> +            throw new NullPointerException( "ldapServer" );
>> +        }
>> +        +        this.ldapServer = ldapServer;
>> +        this.cursor = cursor;
>> +        this.listener = listener;
>> +    }
>> +    +    +    public SearchAbandonListener( LdapServer ldapServer,
>> DirectoryListener listener )
>> +    {
>> +        this ( ldapServer, null, listener );
>> +    }
>> +    +    +    public SearchAbandonListener( LdapServer ldapServer,
>> EntryFilteringCursor cursor )
>> +    {
>> +        this ( ldapServer, cursor, null );
>> +    }
>> +    +    +    public void requestAbandoned( AbandonableRequest req )
>> +    {
>> +        if ( listener != null )
>> +        {
>> +
>>  ldapServer.getDirectoryService().getEventService().removeListener( listener
>> );
>> +        }
>> +
>> +        try
>> +        {
>> +            if ( cursor != null )
>> +            {
>> +                /*
>> +                 * When this method is called due to an abandon request
>> it +                 * will close the cursor but other threads processing
>> the +                 * search will get an OperationAbandonedException which
>> as
>> +                 * seen below will make sure the proper handling is +
>>             * performed.
>> +                 */
>> +                cursor.close( new OperationAbandonedException() );
>> +            }
>> +        }
>> +        catch ( Exception e )
>> +        {
>> +            LOG.error( "Failed to close the search cursor for message {}
>> on abandon request.", +                req.getMessageId(), e );
>> +        }
>> +    }
>> +}
>> +
>> +
>>
>> Modified:
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchHandler.java
>> URL:
>> http://svn.apache.org/viewvc/directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchHandler.java?rev=687555&r1=687554&r2=687555&view=diff
>>
>> ==============================================================================
>> ---
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchHandler.java
>> (original)
>> +++
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchHandler.java
>> Wed Aug 20 21:38:50 2008
>> @@ -20,12 +20,15 @@
>>  package org.apache.directory.server.ldap.handlers;
>>   +import java.util.concurrent.TimeUnit;
>> +
>>  import org.apache.directory.server.core.entry.ClonedServerEntry;
>>  import org.apache.directory.server.core.entry.ServerEntryUtils;
>>  import org.apache.directory.server.core.entry.ServerStringValue;
>>  import org.apache.directory.server.core.event.EventType;
>>  import org.apache.directory.server.core.event.NotificationCriteria;
>>  import org.apache.directory.server.core.filtering.EntryFilteringCursor;
>> +import org.apache.directory.server.ldap.LdapServer;
>>  import org.apache.directory.server.ldap.LdapSession;
>>  import org.apache.directory.shared.ldap.codec.util.LdapURL;
>>  import
>> org.apache.directory.shared.ldap.codec.util.LdapURLEncodingException;
>> @@ -36,7 +39,6 @@
>>  import org.apache.directory.shared.ldap.filter.EqualityNode;
>>  import org.apache.directory.shared.ldap.filter.OrNode;
>>  import org.apache.directory.shared.ldap.filter.PresenceNode;
>> -import org.apache.directory.shared.ldap.message.AbandonListener;
>>  import org.apache.directory.shared.ldap.message.LdapResult;
>>  import org.apache.directory.shared.ldap.message.ManageDsaITControl;
>>  import org.apache.directory.shared.ldap.message.PersistentSearchControl;
>> @@ -70,10 +72,20 @@
>>       /** Speedup for logs */
>>     private static final boolean IS_DEBUG = LOG.isDebugEnabled();
>> +
>> +    /** cached to save redundant lookups into registries */ +    private
>> AttributeType objectClassAttributeType;
>>     -    AttributeType objectClassAttributeType;
>>     -    private EqualityNode<String> getOcIsReferralAssertion(
>> LdapSession session ) throws Exception
>> +    /**
>> +     * Constructs a new filter EqualityNode asserting that a candidate +
>>     * objectClass is a referral.
>> +     *
>> +     * @param session the {@link LdapSession} to construct the node for
>> +     * @return the {@link EqualityNode} (objectClass=referral)
>> non-normalized
>> +     * @throws Exception in the highly unlikely event of schema related
>> failures
>> +     */
>> +    private EqualityNode<String> newIsReferralEqualityNode( LdapSession
>> session ) throws Exception
>>     {
>>         if ( objectClassAttributeType == null )
>>         {
>> @@ -81,14 +93,23 @@
>>                 .getAttributeTypeRegistry().lookup(
>> SchemaConstants.OBJECT_CLASS_AT );
>>         }
>>         -        EqualityNode<String> ocIsReferral = new
>> EqualityNode<String>( -            SchemaConstants.OBJECT_CLASS_AT,
>> +        EqualityNode<String> ocIsReferral = new EqualityNode<String>(
>> SchemaConstants.OBJECT_CLASS_AT,
>>             new ServerStringValue( objectClassAttributeType,
>> SchemaConstants.REFERRAL_OC ) );
>>                 return ocIsReferral;
>>     }
>>         +    /**
>> +     * Handles search requests containing the persistent search control
>> but +     * delegates to doSimpleSearch() if the changesOnly parameter of
>> the +     * control is set to false.
>> +     *
>> +     * @param session the LdapSession for which this search is conducted
>> +     * @param req the search request containing the persistent search
>> control
>> +     * @param psearchControl the persistent search control extracted
>> +     * @throws Exception if failures are encountered while searching
>> +     */
>>     private void handlePersistentSearch( LdapSession session,
>> SearchRequest req,         PersistentSearchControl psearchControl ) throws
>> Exception     {
>> @@ -108,7 +129,12 @@
>>             }
>>         }
>>  -        // now we process entries for ever as they change
>> +        if ( req.isAbandoned() )
>> +        {
>> +            return;
>> +        }
>> +        +        // now we process entries forever as they change
>>         PersistentSearchListener handler = new PersistentSearchListener(
>> session, req );
>>                 // compose notification criteria and add the listener to
>> the event @@ -121,15 +147,17 @@
>>         criteria.setScope( req.getScope() );
>>         criteria.setEventMask( EventType.getEventTypes(
>> psearchControl.getChangeTypes() ) );
>>
>> getLdapServer().getDirectoryService().getEventService().addListener(
>> handler, criteria );
>> +        req.addAbandonListener( new SearchAbandonListener( ldapServer,
>> handler ) );
>>         return;
>>     }
>>             /**
>> -     * Deal with RootDE search. -     * @param session
>> -     * @param req
>> -     * @throws Exception
>> +     * Handles search requests on the RootDSE. +     * +     * @param
>> session the LdapSession for which this search is conducted +     * @param
>> req the search request on the RootDSE
>> +     * @throws Exception if failures are encountered while searching
>>      */
>>     private void handleRootDseSearch( LdapSession session, SearchRequest
>> req ) throws Exception
>>     {
>> @@ -147,9 +175,9 @@
>>             {
>>                if ( hasRootDSE )
>>                {
>> -                       // This is an error ! We should never find more
>> -                       // than one rootDSE !
>> -                       // TODO : handle this error
>> +                       // This is an error ! We should never find more
>> than one rootDSE !
>> +                   LOG.error( "Got back more than one entry for search on
>> RootDSE which means " +
>> +                               "Cursor is not functioning properly!" );
>>                }
>>                else
>>                {
>> @@ -181,6 +209,66 @@
>>             /**
>> +     * Based on the server maximum time limits configured for search and
>> the +     * requested time limits this method determines if at all to
>> replace the +     * default ClosureMonitor of the result set Cursor with one
>> that closes
>> +     * the Cursor when either server mandated or request mandated time
>> limits +     * are reached.
>> +     *
>> +     * @param req the {@link SearchRequest} issued
>> +     * @param session the {@link LdapSession} on which search was
>> requested
>> +     * @param cursor the {@link EntryFilteringCursor} over the search
>> results
>> +     */
>> +    private void setTimeLimitsOnCursor( SearchRequest req, LdapSession
>> session, final EntryFilteringCursor cursor )
>> +    {
>> +        // Don't bother setting time limits for administrators
>> +        if ( session.getCoreSession().isAnAdministrator() &&
>> req.getTimeLimit() == 0 )
>> +        {
>> +            return;
>> +        }
>> +        +        /*
>> +         * Non administrator based searches are limited by time if the
>> server +         * has been configured with unlimited time and the request
>> specifies +         * unlimited search time
>> +         */
>> +        if ( ldapServer.getMaxTimeLimit() == LdapServer.NO_TIME_LIMIT &&
>> req.getTimeLimit() == 0 )
>> +        {
>> +            return;
>> +        }
>> +        +        /*
>> +         * If the non-administrator user specifies unlimited time but the
>> server +         * is configured to limit the search time then we limit by
>> the max time +         * allowed by the configuration +         */
>> +        if ( req.getTimeLimit() == 0 )
>> +        {
>> +            cursor.setClosureMonitor( new SearchTimeLimitingMonitor(
>> ldapServer.getMaxTimeLimit(), TimeUnit.SECONDS ) );
>> +            return;
>> +        }
>> +        +        /*
>> +         * If the non-administrative user specifies a time limit equal to
>> or +         * less than the maximum limit configured in the server then we
>> +         * constrain search by the amount specified in the request
>> +         */
>> +        if ( ldapServer.getMaxSizeLimit() >= req.getTimeLimit() )
>> +        {
>> +            cursor.setClosureMonitor( new SearchTimeLimitingMonitor(
>> req.getTimeLimit(), TimeUnit.SECONDS ) );
>> +            return;
>> +        }
>> +
>> +        /*
>> +         * Here the non-administrative user's requested time limit is
>> greater +         * than what the server's configured maximum limit allows
>> so we limit
>> +         * the search to the configured limit
>> +         */
>> +        cursor.setClosureMonitor( new SearchTimeLimitingMonitor(
>> ldapServer.getMaxTimeLimit(), TimeUnit.SECONDS ) );
>> +    }
>> +    +    +    /**
>>      * Conducts a simple search across the result set returning each entry
>>      * back except for the search response done.  This is calculated but not
>>      * returned so the persistent search mechanism can leverage this
>> method
>> @@ -191,7 +279,8 @@
>>      * @return the result done      * @throws Exception if there are
>> failures while processing the request
>>      */
>> -    private SearchResponseDone doSimpleSearch( LdapSession session,
>> SearchRequest req ) throws Exception
>> +    private SearchResponseDone doSimpleSearch( LdapSession session,
>> SearchRequest req ) +        throws Exception
>>     {
>>         /*
>>          * Iterate through all search results building and sending back
>> responses
>> @@ -202,13 +291,9 @@
>>         try
>>         {
>>             cursor = session.getCoreSession().search( req );
>> +            req.addAbandonListener( new SearchAbandonListener(
>> ldapServer, cursor ) );
>> +            setTimeLimitsOnCursor( req, session, cursor );
>>             -            // TODO - fix this (need to make Cursors
>> abandonable)
>> -            if ( cursor instanceof AbandonListener )
>> -            {
>> -                req.addAbandonListener( ( AbandonListener ) cursor );
>> -            }
>> -                 // Position the cursor at the beginning
>>             cursor.beforeFirst();
>>             @@ -361,7 +446,7 @@
>>         }
>>           // using varags to add two expressions to an OR node -
>>  req.setFilter( new OrNode( req.getFilter(), getOcIsReferralAssertion(
>> session ) ) );
>> +        req.setFilter( new OrNode( req.getFilter(),
>> newIsReferralEqualityNode( session ) ) );
>>     }
>>
>> Added:
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchTimeLimitingMonitor.java
>> URL:
>> http://svn.apache.org/viewvc/directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchTimeLimitingMonitor.java?rev=687555&view=auto
>>
>> ==============================================================================
>> ---
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchTimeLimitingMonitor.java
>> (added)
>> +++
>> directory/apacheds/trunk/protocol-ldap/src/main/java/org/apache/directory/server/ldap/handlers/SearchTimeLimitingMonitor.java
>> Wed Aug 20 21:38:50 2008
>> @@ -0,0 +1,149 @@
>> +/*
>> + *   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.ldap.handlers;
>> +
>> +
>> +import java.util.concurrent.TimeUnit;
>> +
>> +import org.apache.directory.server.core.cursor.ClosureMonitor;
>> +import org.apache.directory.server.core.cursor.CursorClosedException;
>> +import
>> org.apache.directory.shared.ldap.exception.LdapTimeLimitExceededException;
>> +
>> +
>> +/**
>> + * A ClosureMonitor implementation which takes into account a time limit.
>> + *
>> + * @author <a href="mailto:dev@directory.apache.org">Apache Directory
>> Project</a>
>> + * @version $Rev$, $Date$
>> + */
>> +public class SearchTimeLimitingMonitor implements ClosureMonitor
>> +{
>> +    private final long startTime = System.currentTimeMillis();
>> +    private final long millisToLive;
>> +    +    private boolean closed;
>> +    private Exception cause;
>> +    +    +    public SearchTimeLimitingMonitor( long timeToLive, TimeUnit
>> unit )
>> +    {
>> +        switch ( unit )
>> +        {
>> +            case MICROSECONDS:
>> +                this.millisToLive = timeToLive / 1000;
>> +                break;
>> +            case MILLISECONDS:
>> +                this.millisToLive = timeToLive;
>> +                break;
>> +            case SECONDS:
>> +                this.millisToLive = timeToLive * 1000;
>> +                break;
>> +            case MINUTES:
>> +                this.millisToLive = timeToLive * 60000;
>> +                break;
>> +            default:
>> +                throw new IllegalStateException( "TimeUnit not supported:
>> " + unit );
>> +        }
>> +    }
>> +
>> +    +    public void checkNotClosed() throws Exception
>> +    {
>> +        if ( System.currentTimeMillis() > startTime + millisToLive )
>> +        {
>> +            // state check needed to "try" not to overwrite exception
>> (lack of +            // synchronization may still allow overwriting but who
>> cares that +            // much
>> +            if ( ! closed )
>> +            {
>> +                // not going to sync because who cares if it takes a
>> little +                // longer to stop but we need to set cause before
>> toggling +                // closed state or else check for closure can
>> throw null cause +                cause = new
>> LdapTimeLimitExceededException();
>> +                closed = true;
>> +            }
>> +        }
>> +        +        if ( closed )
>> +        {
>> +            throw cause;
>> +        }
>> +    }
>> +
>> +    +    public void close()
>> +    {
>> +        if ( ! closed )
>> +        {
>> +            // not going to sync because who cares if it takes a little
>> longer +            // to stop but we need to set cause before toggling
>> closed state +            // or else check for closure can throw null cause
>> +            cause = new CursorClosedException();
>> +            closed = true;
>> +        }
>> +    }
>> +
>> +    +    public void close( String cause )
>> +    {
>> +        if ( ! closed )
>> +        {
>> +            // not going to sync because who cares if it takes a little
>> longer +            // to stop but we need to set cause before toggling
>> closed state +            // or else check for closure can throw null cause
>> +            this.cause = new CursorClosedException( cause );
>> +            closed = true;
>> +        }
>> +    }
>> +
>> +    +    public void close( Exception cause )
>> +    {
>> +        if ( ! closed )
>> +        {
>> +            // not going to sync because who cares if it takes a little
>> longer +            // to stop but we need to set cause before toggling
>> closed state +            // or else check for closure can throw null cause
>> +            this.cause = cause;
>> +            closed = true;
>> +        }
>> +    }
>> +
>> +    +    public Exception getCause()
>> +    {
>> +        return cause;
>> +    }
>> +
>> +    +    public boolean isClosed()
>> +    {
>> +        if ( System.currentTimeMillis() > startTime + millisToLive )
>> +        {
>> +            // set cause first always
>> +            cause = new LdapTimeLimitExceededException();
>> +            closed = true;
>> +        }
>> +        +        return closed;
>> +    }
>> +}
>> +
>> +
>>
>>
>>
>>
>>
>
>
> --
> --
> cordialement, regards,
> Emmanuel L├ęcharny
> www.iktek.com
> directory.apache.org
>
>
>

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