On 1/9/06, Wade Chandler [EMAIL PROTECTED] wrote:
...
I don't know about 5.5.15, but 5.5.9 used HashMap.
The synchronization of the session object was an issue
which caused other issues and is why there should now
be synchronization on the reading as well as writing
session attributes. There
on HttpSession in tomcat is unnecessary.
ND
-Original Message-
From: GB Developer [mailto:[EMAIL PROTECTED]
Sent: Friday, January 06, 2006 6:33 PM
To: 'Tomcat Users List'
Subject: RE: Single Thread is deprecated?
-Original Message-
From: Duan, Nick [mailto:[EMAIL PROTECTED]
Sent: Friday
-Original Message-
From: Duan, Nick [mailto:[EMAIL PROTECTED]
Sent: Monday, January 09, 2006 11:41 AM
To: Tomcat Users List
Subject: RE: Single Thread is deprecated?
HttpSession should be implemented (it's just an interface). In fact,
the session attributes were implemented
--- Duan, Nick [EMAIL PROTECTED] wrote:
Well, when I was mentioning the term user session, I
was discussing from
a threading/transaction perspective, not from the
servlet object
perspective. It is the worker thread that
represents a active user
session and accesses both the session and
--- Wade Chandler [EMAIL PROTECTED]
wrote:
--- Duan, Nick [EMAIL PROTECTED] wrote:
Well, when I was mentioning the term user session,
I
was discussing from
a threading/transaction perspective, not from the
servlet object
perspective. It is the worker thread that
represents a
George Sexton wrote:
-Original Message-
From: Duan, Nick [mailto:[EMAIL PROTECTED]
HttpSession should be implemented (it's just an interface). In fact,
the session attributes were implemented as a Hashtable in
tomcat, not a
Hashmap (just double checked the latest 5.5.15 src of tomcat).
GB Developer wrote:
Sessions are (never?) thread-safe. Which is perhaps one reason why
SingleThreadModel was deprecated. People thought by using that interface
that they would never have to worry about synch issues again.
The servlet spec 2.5 draft says in SRV 2.2.1. (should be similar in
-Original Message-
From: Michael Echerer [mailto:[EMAIL PROTECTED]
Sent: Friday, January 06, 2006 11:52 AM
To: Tomcat Users List
Subject: Re: Single Thread is deprecated?
Christian Stalp wrote:
Hello out there,
I want to build a servelt which access a database. To avoid
race
Dakota Jack wrote:
Actually, any class with only local variables is always thread safe.
True for locals, but we were talking about instanceclass variables,
actually.
-
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For additional
Michael Echerer wrote:
Dakota Jack wrote:
Actually, any class with only local variables is always thread safe.
True for locals, but we were talking about instanceclass variables,
actually.
You may of course still have instanceclass variables... ThreadLocals
(usually static) work fine ;-)
On 1/6/06, Christian Stalp [EMAIL PROTECTED] wrote:
Hello out there,
I want to build a servelt which access a database. To avoid
race-conditions and to realize synchronous access, I decited to make a
Singe Thread Servlet. But Eclipse told me that this is no longer a
usable code.
So what can
Remy Maucherat wrote:
It's deprecated because it is confusing, but it is actually very
useful performance wise in some cases, since it does pooling. I will
make sure this feature remains available in the future.
That means, I still can use it?! Deprecated is not prohibited!?!! Is
there any
Christian Stalp wrote:
Remy Maucherat wrote:
It's deprecated because it is confusing, but it is actually very
useful performance wise in some cases, since it does pooling. I will
make sure this feature remains available in the future.
That means, I still can use it?! Deprecated is not
--- Christian Stalp [EMAIL PROTECTED] wrote:
Remy Maucherat wrote:
It's deprecated because it is confusing, but it is
actually very
useful performance wise in some cases, since it
does pooling. I will
make sure this feature remains available in the
future.
That means, I still
Christian Stalp wrote:
Hello out there,
I want to build a servelt which access a database. To avoid
race-conditions and to realize synchronous access, I decited to make a
Singe Thread Servlet. But Eclipse told me that this is no longer a
usable code.
Usually the best solution is to
On 1/6/06, Michael Echerer [EMAIL PROTECTED] wrote:
In worst case you won't even achieve what you want using single thread
mode because according to the servlet specification servlet containers
are free to pool servlets, if it implements SingleThreadModel. Hence you
could have multiple pooled
Remy Maucherat wrote:
On 1/6/06, Michael Echerer [EMAIL PROTECTED] wrote:
In worst case you won't even achieve what you want using single thread
mode because according to the servlet specification servlet containers
are free to pool servlets, if it implements SingleThreadModel. Hence you
could
Remy Maucherat schrieb:
Nice, but completely wrong. STM in Tomcat uses an instance pool which
allows having a minimal impact (something like 5%), and it will
perform much better than syncing, unless the said sync is trivial.
The reason this is deprecated is because some people thought it would
List
Subject: Re: Single Thread is deprecated?
Christian Stalp wrote:
Hello out there,
I want to build a servelt which access a database. To avoid
race-conditions and to realize synchronous access, I decited to make a
Singe Thread Servlet. But Eclipse told me that this is no longer a
usable
Thread is deprecated?
Christian Stalp wrote:
Hello out there,
I want to build a servelt which access a database. To avoid
race-conditions and to realize synchronous access, I decited to make a
Singe Thread Servlet. But Eclipse told me that this is no longer a
usable code.
Usually the best
of
HttpServlet, why bother to sync them?
ND
-Original Message-
From: Michael Echerer [mailto:[EMAIL PROTECTED]
Sent: Friday, January 06, 2006 5:44 PM
To: Tomcat Users List
Subject: Re: Single Thread is deprecated?
Duan, Nick wrote:
HttpServlet is inherently thread-safe as long as you don't
From: Duan, Nick [mailto:[EMAIL PROTECTED]
Subject: RE: Single Thread is deprecated?
Typo due to my laziness. I knew someone was going to catch this.
Actually the sentence should read: ... because there is only one
servlet that is active during a single user session.
Are you really
-Original Message-
From: Duan, Nick [mailto:[EMAIL PROTECTED]
Sent: Friday, January 06, 2006 5:14 PM
To: Tomcat Users List
Subject: RE: Single Thread is deprecated?
Typo due to my laziness. I knew someone was going to catch
this. Actually the sentence should read: ... because
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