Re: [fpc-pascal] Win64 SEH patch fixes some Firebird embedded bugs
On 21-6-2012 11:39, michael.vancann...@wisa.be wrote: On Thu, 21 Jun 2012, Reinier Olislagers wrote: Thought I'd let everybody know in case they run into Firebird x64 (embedded) problems on Windows and to indicate that implementing the SEH patch might be a good idea... Well, I was going to test the above bugs and if they fixed the issue, recommend to enable SEH by default on Win64. Recommend away, I'd say ;) Thanks, Reinier ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
RE : [fpc-pascal] Postgresql Concurrent Transactions
Each manager thread has its own Connection, Transaction, and TQuery. Each manager can handle potentially thousands of sockets Each server instance (1 process) can have up to ~100 manager threads. Each Manager executes socket commands that translate at some point, into a Database, Select, Update, or Delete. My current problem: If a user updates a table by uploading large a video (say about 200+MB) the sql server locks pretty much every table and prevents other sockets which during the SQL execution. This is true for Delete and Update as of v9.1. Are the tables locked or is the server just slow? What does 'select * from pg_catalog.pg_locks where granted is false' return? For a query that lists interdependent lock information see http://wiki.postgresql.org/wiki/Lock_dependency_information http://wiki.postgresql.org/wiki/Lock_dependency_information. Implications. Parallel commands executed on other threads aren't able to execute b/c the postgresql server just sits there waiting for the update transaction to complete. PostgreSQL is locking all subsequent calls to even other tables. Remediation: Memory barriers are already in place to ensure that other threads don't access the TConnection,TQuery or other things during the problematic transaction. Is there a way to use specify a SHARE mode in transactions for TPostgres component? That I don't understand. You started with each thread having its own Tconnection,TTransaction, Tquery. Here you say you put a memory barrier to stop access to Tconnection,Tquery from other threads. During the problematic transaction: is this a one query transaction or do you have a lot of queries on multiple tables in the transaction, triggers included? What is your isolation level for these transactions? What exactly do you want to share in transactions for TPostgres component? How are TPostgres components related to a server locking tables? How have anyone who've encountered this problem solved this issue? Any feedback is welcome. I haven't run into this problem yet but some general advise: 1) Determine what the exact cause of the lock is before implementing remedies. 2) The postgresql components make a lot of connections. When serving that many clients, you will probably benefit from connection pooling. Look at something like pgpool-II http://pgpool.projects.postgresql.org/. 3) Putting 200MB files in a database is a bad idea Ludo ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Adding method dynamically to a class
Use event properties (Properties to a procedural type) Adding completely free methods to a class makes no sense. By free i mean a method that has no clear signature (parameters and result type) because calling them will be a nightmare (You will have to do the compiler work and build your own parameter passing and return type system). This is usually done in interpreters but what you describe doesnt sound like a interpreter. 2012/6/21 ik ido...@gmail.com: On Wed, Jun 20, 2012 at 2:15 PM, Inoussa OUEDRAOGO inouss...@gmail.com wrote: Think of a plug-able system. I have an engine, and code to execute. Instead of compile everything to an ELF/PE, I place code on dynamic shard library, and load it on run time when needed. The idea is that the engine will not be rewritten for every new request (that comes often), because it's logic (almost) never changes, but to load code on demand that often changes, provide additional functions, changes of logic, bug fixes etc... WST library server implementation could be a elegant solution : it is web-services that are locally located in dynamic library(DLL)/shared object(so) instead of being remote. The main executable acts as client while the server's implementation as provided as shared objects. No TCP is used, only memory through the WST's library protocol. No SOAP serialization as you can use the WST's custom binary messaging format that is very fast. To resume : * The main executable defines a WSDL schema that contains the types (think of this as IDL) * The servers implement the service exposed in the schema. * The main executable loads the servers using the library protocol Main benefits are : * much larger type system available (wsdl, WST contains a type library editor) * you could later even add remote servers without changing your main application, just create the service with the desired location parameters. Thank you, I'll check it out. My problem is something like with WDSL idea. -- Inoussa O. Ido ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
[fpc-pascal] AUTO: Luca Manganelli è assente dall'ufficio
Sono fuori dall'ufficio da Ven 22/06/2012 fino a Lun 16/07/2012. Nota: Questa è una risposta automatizzata al messaggio Re: [fpc-pascal] Adding method dynamically to a class inviata il 22/06/2012 15.25.21. Questa è l'unica notifica che verrà ricevuta mentre la persona è assente.___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
[fpc-pascal] encryption and decryption
Does someone know how to do encryption and decryption with keys? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] encryption and decryption
Theres a blowfish encryption system in freepascal http://www.freepascal.org/docs-html/fcl/blowfish/index.html 2012/6/22 Rainer Stratmann rainerstratm...@t-online.de: Does someone know how to do encryption and decryption with keys? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] DOM and namespaces with prefix
On Tue, Jun 19, 2012 at 10:11 AM, Torsten Bonde Christiansen
t...@epidata.info wrote:
DDIInstance := XMLDoc.CreateElementNS('ddi:instance:3_0', 'DDIInstance');
DDIInstance.Prefix := 'ns1'; // this gives me: ns1:DDIInstance
xmlns:ns1=ddi:instance:3_0 which is great.
// now I would like to expand with eg: xmlns:a=ddi:archive:3_0
Attr := XMLDoc.CreateAttributeNS('ddi:archive:3_0', 'huh');
Attr.Prefix := 'a';
DDIInstance.SetAttributeNode(Attr); // but this gives: ns1:DDIInstance
xmlns:ns1=ddi:instance:3_0 xmlns:a=ddi:archive:3_0 a:huh=/
How can i get the xmlns:a=ddi:archive:3_0 without the additional
attribute AND maintain the namespace + prefix in later elements?
I believe that the solution(given by Sergei Gorelkin at [1]) is:
DDIInstance.SetAttributeNS('ddi:archive:3_0','xmlns:a','ddi:archive:3_0');
[1] http://bugs.freepascal.org/view.php?id=22299#c60652
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Re: [fpc-pascal] encryption and decryption
2012/6/22 Jorge Aldo G. de F. Junior jagf...@gmail.com: Theres a blowfish encryption system in freepascal http://www.freepascal.org/docs-html/fcl/blowfish/index.html 2012/6/22 Rainer Stratmann rainerstratm...@t-online.de: Does someone know how to do encryption and decryption with keys? Hellow guys, How to use TBlowFishEnCryptStream? Is there any example for mortals? :) -- Silvio Clécio My public projects - github.com/silvioprog ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
