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From Christopher Currens <currens.ch...@gmail.com>
Subject Re: Lucene.Net 3.0.3 and medium trust
Date Tue, 14 Aug 2012 16:08:22 GMT
Inheriting from WeakReference was the problem.  I'm just going to
remove the wrapper entirely, it doesn't give us any real benefit.  The
code has already been pushed.


Thanks,
Christopher

On Tue, Aug 14, 2012 at 8:46 AM, Prescott Nasser <geobmx540@hotmail.com> wrote:
> It'd be nice to understand where this issue is coming from as it wasn't in 2.9.4 rather
than jumping to a quick fix imo. I'll dig a bit myself
> ~P
>
>> Date: Tue, 14 Aug 2012 17:32:29 +0200
>> From: sisve@devhost.se
>> To: lucene-net-dev@lucene.apache.org
>> Subject: Re: Lucene.Net 3.0.3 and medium trust
>>
>> Hi,
>>
>> It got worse. Building a custom AttributeFactory can only handle a few
>> cases, I needed to subclass _every_ TokenStream/TokenFilter to override
>> all attribute-handling methods (AddAttribute, GetAttribute, etc), and
>> all analyzers to use these streams, to use a dictionary with strong
>> references just for medium trust... I gave up before doing that. ;)
>>
>> Is there any use cases where we need to garbage collect attributes
>> before the stream/attribute source is closed? Changing to a normal
>> dictionary seems like a quick fix.
>>
>> // Simon
>>
>>
>> On 2012-08-14 17:21, Christopher Currens wrote:
>> > It must be something we've missed, as we want to target medium trust
>> > locations in the future.  I can't think of anything off the top of my
>> > head that would require medium trust, though, let alone unmanaged
>> > code.  I'll dive into this.
>> >
>> >
>> > Thanks,
>> > Christopher
>> >
>> > On Mon, Aug 13, 2012 at 10:01 PM, Simon Svensson <sisve@devhost.se> wrote:
>> >> Hi,
>> >>
>> >> I'm having trouble upgrading a web application running under medium trust
>> >> from 2.9.4 to 3.0.3. Code that previously worked now throws a
>> >> SecurityException.
>> >>
>> >> [SecurityException: Request for the permission of type
>> >> 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0,
>> >> Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
>> >>     Lucene.Net.Support.WeakKey`1..ctor(T key) +0
>> >>     Lucene.Net.Support.WeakDictionary`2.get_Item(TKey key) +113
>> >>     Lucene.Net.Util.DefaultAttributeFactory.GetClassForInterface() +178
>> >>     Lucene.Net.Util.DefaultAttributeFactory.CreateAttributeInstance() +95
>> >>     Lucene.Net.Util.AttributeSource.AddAttribute() +375
>> >>     Lucene.Net.Analysis.CharTokenizer..ctor(TextReader input) +126
>> >>     Lucene.Net.Analysis.WhitespaceTokenizer..ctor(TextReader in) +37
>> >>
>> >>
>> >> The DefaultAttributeFactory, via WeakReference, requires
>> >> SecurityPermissionFlag.UnmanagedCode which is not present under medium
>> >> trust. There's an AttributeFactory.DEFAULT_ATTRIBUTE_FACTORY which I could
>> >> to replace the DefaultAttributeFactory, but it's readonly. I'm rewriting
my
>> >> code to call the constructor overload (on tokenizers) accepting an
>> >> AttributeFactory, but this means that I cannot use any existing Analyzer
>> >> since they don't provide an extension points to change the AttributeFactory.
>> >>
>> >> Is medium trust [using default classes] dropped in 3.0.3, or is this
>> >> something we've missed?
>> >>
>> >> // Simon
>>
>

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