[ndnSIM] Content Store data manipulation

[Alex Afanasyev]

Hi Isuru,

The ContentStore::Add method is called (and which results in calling of the selected ContentStoreImpl<Policy>::Add method) from ndn::ForwardingStrategy (model/fw/ndn-forwarding-strategy.cc line 239 and 255).

Further, ContentStoreImpl<Policy>::Add calls insert method on the underlying policy-based controller, which results in calling policy-specific 'insert' method.  For example, if selected policy is Lru, then `insert' method defined in utils/trie/lru-policy.h line 77-87.

---
Alex

On Nov 17, 2013, at 10:57 AM, <i.liyanage at surrey.ac.uk> <i.liyanage at surrey.ac.uk> wrote:

> Hi Alex,
> 
> I looked at the both implementations and still not sure how to handle the entries in CS.
> 
> for an example when data is received by a node what method inserts the data to CS??
> Assuming the method ContentStoreImpl<Policy>::Add (Ptr<const Data> data) is executed,
> from where does this method is called
> 
> many thanks,
> Isuru
> From: Alexander Afanasyev <cawka1 at gmail.com> on behalf of Alex Afanasyev <alexander.afanasyev at ucla.edu>
> Sent: 14 November 2013 22:21
> To: Liyanage IU Mr (PG/R - Electronic Eng)
> Cc: ndnsim at lists.cs.ucla.edu
> Subject: Re: [ndnSIM] Content Store data manipulation
>  
> Hi Isuru,
> 
> utils/ folder contain general-use policies and model/cs/ folder contain policy that can be used only with ContentStore.  I would recommend to start with general-use and just peek at ContentStore-specific policy to see how to access information from cached entry.
> 
> ---
> Alex
> 
> On Nov 14, 2013, at 9:36 AM, <i.liyanage at surrey.ac.uk> <i.liyanage at surrey.ac.uk> wrote:
> 
>> Hi Alex,
>> 
>> To write a policy which file should I refer to. I noticed the ContentStore implementation in */model/ cs folder and policy file in */utils/ trie folder.
>> Could you suggest me good way to start to create a new policy.
>> 
>> Many thanks,
>> Isuru
>> 
>> From: Alexander Afanasyev <cawka1 at gmail.com> on behalf of Alex Afanasyev <alexander.afanasyev at ucla.edu>
>> Sent: 14 November 2013 16:07
>> To: Liyanage IU Mr (PG/R - Electronic Eng)
>> Cc: ndnsim at lists.cs.ucla.edu
>> Subject: Re: [ndnSIM] Content Store data manipulation
>>  
>> Hi Isuru,
>> 
>> Since ContentStore is property of the forwarding daemon, there is no application interface to directly manage (add/remove) entries.  You can have full control over the cache content if you write a so-called policy, but this will not be application.
>> 
>> ---
>> Alex
>> 
>> On Nov 14, 2013, at 3:25 AM, i.liyanage at surrey.ac.uk wrote:
>> 
>>> Hi,
>>> 
>>> Is it possible to add/remove Content Store entries using a application on a node.
>>> If it is what methods should I use.
>>> 
>>> many thanks,
>>> Isuru
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