473,788 Members | 2,893 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Dynamic updates of remote object without service interruption

Hi eveybody,

I need some help regarding the mecanism to put in place to be able to
dynamically update a remote object when the assembly where it is defined is
modified, and this whitout having service interruption.

Basically what I'm missing is how do we re-expose a remote object when
assembly has changed, and this without any interruption to the callers.

I have an application that exposes a remoting object (Well known service -
Singleton or singlecall).

It works as follows:

1. Console application starts
2. Console application creates an application domain
3. Shadow copy is enabled on this application domain (so that the assembly
can be changed, it is not locked)
4. Register a HTTP channel in this appDomain.
5. It then loads a specific assembly in the newly created appDomain and
register a well known service using a type found in this assembly.
6. Use FileWatcher to be notified on assembly file change.

Later, the assembly is modified. i now want to restart the service using the
new assembly.

Currently, i just unload the appDomain, then redo step 2 to step 5. Problem
is that there is a short time where the service becomes un-available and
where requests are interrupted.

Questions: How can i restart the service without having service interruption.
The idea is to process current request with old application domain, and
forward new request to new application domain.
Then once all old requests have been processed, the old application domain
can be safely unloaded.
I think i may have to use channel sink but I'm not sure.

How can i achieve this ? I know ASP.NET is using this mecanism extensively
to handle dynamic assembly changes.
Any help, ideas, code samples, etc will be greatly appreciated

--
Nick
Mar 1 '06 #1
0 1005

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

8
2549
by: Eyeawanda Pondicherry | last post by:
I have put some code together that creates an enum dynamically from some database values. The enum can be read perfectly by an application that references the dynamically generated dll. If I /emit/ a new version of the assembly, and start the application again, the new values will appear for the enum. However, suppose I want the application to remain in a running state.
8
2457
by: Julia | last post by:
Hi, My client uses a remote object when I host the remote object inside a windows application all seem to work fine but when I host the same object inside a windows service I get the following error " connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because
15
2092
by: JJ | last post by:
A current requirement I am facing is the all business objects be stateless remote components hosted in IIS. I am partial to web services myself. However, it is insisted that IIS hosted remoting be used. They insist that it is much, much faster. I don’t necessarily disagree with that point. But under the circumstances, a web service that is load balanced (as are the remote objects), though technically slower, would still have a lot of...
1
2609
by: Jim Bayers | last post by:
Our network nazi doesn't want us running a webserver on the server that has a connection to the campus database so we created a remote object that runs as a windows service. The windows service runs on the server with a connection to the campus database and we make calls to it. My question is, how best to connect to this object via asp.net, in an aspx page?. The example I had used a console ap to connect and that works, but we want to...
5
5753
by: felecha | last post by:
I have a VB.Net application that runs as a Windows Service and monitors a MessageQueue on another machine. At times that machine will have to be rebooted, so I've been working on how to get my Service to re-establish the connection after the remote machine is back. I found that as soon as the remote machine goes down, the BeginReceive() method and the ReceiveCompleted() event handler start throwing an exception, for QueueNotAvailable,...
4
5612
by: Blaxer | last post by:
I have read approximately 30 articles now on various methods to make your vb.net application automatically update itself and I can't see how they apply to a vb.net windows services projects. The goal of the project is to write a windows service in vb.net that runs on many workstations that can automatically update itself from a central web server or share (either or doesn’t matter). I do not want the service to re-install itself each time...
3
2498
by: Fredric Ragnar | last post by:
Hi, I am making a prototype system with Remoting in the bottom of the system. An XML Web Service is using the remote object on an IIS to present data. I am using a TcpChannel for communicating between the XML Web Service and the host for the remote object. Within the host a port is defined and the channel registered. It starts listening for requests. The destination port is therefore clearly defined.
3
2218
by: lk | last post by:
I need some help regarding the mechanism to put in place to be able to dynamically update a remote object when the assembly where it is defined is modified, and this whitout having service interruption. Basically what I'm missing is how do we re-expose a remote object when assembly has changed, and this without any interruption to the callers. I have an application that exposes a remoting object (Well known service - Singleton or...
15
7088
by: =?Utf-8?B?TVNU?= | last post by:
To demonstrate my problem, I have a very simple VB Windows application. It has a text box that is used to display a counter, a button to reset the counter, and a timer that increments the counter every second. I remote desktop to the computer hosting this application and run the application. It starts up and displays the counter incrementing every second. If I disconnect the network cable between the two computers for 10 seconds and...
1
1708
by: markla | last post by:
Hi, Can someone help me understand why for the code below, when added as a "FieldTemplate" in Dynamic Data, and rendered for a field, does not trigger the "test" function and hence update the label control? (CodeBehind is pretty much same as the original shipped ForeignKey_Edit code, and an event in the codeBehind does not get fired either)
0
9656
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9498
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10366
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10173
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
7517
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6750
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5399
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
4070
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
2894
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.