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  • Calling webservice from WCF service

    - by Balaji
    I am having an issue consuming a webservice (c#.net) from a WCF service. The error i am getting is EndPointNotFoundException "TCP error code 10061: No connection could be made because the target machine actively refused it" I wrote a unit test to check if i could send a request to the web service and it worked fine [The unit test is using the same binding configuration as my WCF service] The web service and WCF service (client) have basichttp binding. Did anyone had similar kind of issue calling a webservice from a WCF service? The service Model section is as follows <system.serviceModel> <bindings> <basicHttpBinding> <binding name="DataService" closeTimeout="00:05:00" openTimeout="00:05:00" receiveTimeout="00:10:00" sendTimeout="00:05:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384"/> <security mode="None"> <transport clientCredentialType="None" proxyCredentialType="None" realm=""/> <message clientCredentialType="UserName" algorithmSuite="Default"/> </security> </binding> </basicHttpBinding> </bindings> <client> <endpoint address="http://10.22.33.67/Service/DataService.asmx" binding="basicHttpBinding" bindingConfiguration="DataService" contract="Service.DataService" name="DataService"/> </client> <services> <service name="TestToConsumeDataService.WCFHost.Service1" behaviorConfiguration="TestToConsumeDataService.WCFHost.Service1Behavior"> <!-- Service Endpoints --> <endpoint address="" binding="basicHttpBinding" contract="TestToConsumeDataService.WCFHost.IService1"> <!-- Upon deployment, the following identity element should be removed or replaced to reflect the identity under which the deployed service runs. If removed, WCF will infer an appropriate identity automatically. --> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="TestToConsumeDataService.WCFHost.Service1Behavior"> <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment --> <serviceMetadata httpGetEnabled="true"/> <!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information --> <serviceDebug includeExceptionDetailInFaults="false"/> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> The unit test project is also using the same service model section and it works. The only issue is while calling the service from another WCF service. Could you please suggest.

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  • Which pattern to use for logging? Dependency Injection or Service Locator?

    - by andlju
    Consider this scenario. I have some business logic that now and then will be required to write to a log. interface ILogger { void Log(string stuff); } interface IDependency { string GetInfo(); } class MyBusinessObject { private IDependency _dependency; public MyBusinessObject(IDependency dependency) { _dependency = dependency; } public string DoSomething(string input) { // Process input var info = _dependency.GetInfo(); var intermediateResult = PerformInterestingStuff(input, info); if (intermediateResult== "SomethingWeNeedToLog") { // How do I get to the ILogger-interface? } var result = PerformSomethingElse(intermediateResult); return result; } } How would you get the ILogger interface? I see two main possibilities; Pass it using Dependency Injection on the constructor. Get it via a singleton Service Locator. Which method would you prefer, and why? Or is there an even better pattern? Update: Note that I don't need to log ALL method calls. I only want to log a few (rare) events that may or may not occur within my method.

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  • Scheme vs Common Lisp: war stories

    - by SuperElectric
    There are no shortage of vague "Scheme vs Common Lisp" questions on both StackOverflow and on this site, so I want to make this one more focused. The question is for people who have coded in both languages: While coding in Scheme, what specific elements of your Common Lisp coding experience did you miss most? Or, inversely, while coding in Common Lisp, what did you miss from coding in Scheme? I don't necessarily mean just language features. The following are all valid things to miss, as far as the question is concerned: Specific libraries. Specific features of development environments like SLIME, DrRacket, etc. Features of particular implementations, like Gambit's ability to write blocks of C code directly into your Scheme source. And of course, language features. Examples of the sort of answers I'm hoping for: "I was trying to implement X in Common Lisp, and if I had Scheme's first-class continuations, I totally would've just done Y, but instead I had to do Z, which was more of a pain." "Scripting the build process in my Scheme project got increasingly painful as my source tree grew and I linked in more and more C libraries. For my next project, I moved back to Common Lisp." "I have a large existing C++ codebase, and for me, being able to embed C++ calls directly in my Gambit Scheme code was totally worth any shortcomings that Scheme may have vs Common Lisp, even including lack of SWIG support." So, I'm hoping for war stories, rather than general sentiments like "Scheme is a simpler language" etc.

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  • Hosting a WCF Service Lib through a Windows service get a System.InvalidOperationException: attempti

    - by JohnL
    I have a WCF Service Library containing five service contracts. The library is hosted through a Windows Service. Most if not all my configuration for the WCF Library is declaritive. The only thing I am doing in code for configuration is to pass the type of the class implementing the service contracts into ServiceHost. I then call Open on each of the services during the Windows Service OnStart event. Here is the error message I get: Service cannot be started. System.InvalidOperationException: Service '[Fubu.Conversion.Service1' has zero application (non-infrastructure) endpoints. This might be because no configuration file was found for your application, or because no service element matching the service name could be found in the configuration file, or because no endpoints were defined in the service element. at System.ServiceModel.Description.DispatcherBuilder.EnsureThereAreNonMexEndpoints(ServiceDescription description) at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnBeginOpen() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open() at Fubu.RemotingHost.RemotingHost.StartServ... protected override void OnStart(string[] args) { // Uncomment to debug this properly //System.Diagnostics.Debugger.Break(); StartService1(); StartService2(); StartService3(); StartService4(); StartService5(); } Each of the above simply do the following: private void StartSecurityService() { host = new ServiceHost(typeof(Service1)); host.Open(); } Service Lib app.congfig summary <services> <service behaviorConfiguration="DefaultServiceBehavior" name="Fubu.Conversion.Service1"> <endpoint address="" binding="netTcpBinding" bindingConfiguration="TCPBindingConfig" name="Service1" bindingName="TCPEndPoint" contract="Fubu.Conversion.IService1"> <identity> <dns value="localhost" /> </identity> </endpoint> <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration="" name="mexSecurity" bindingName="TcpMetaData" contract="IMetadataExchange" /> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:8025/Fubu/Conversion/Service1/" /> </baseAddresses> </host> </service> ... Contract is set up as follows: namespace Fubu.Conversion.Service1 { [ServiceContract(Namespace = "net.tcp://localhost:8025/Fubu")] public interface IService1 { I have looked "high and low" for a solution without any luck. Is the answer obvious? The solution to this does not appear to be. Thanks

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  • How do I start the postgreSQL service upon boot?

    - by Homunculus Reticulli
    I am running PostgreSQL (v 8.4) on Ubuntu 10.0.4. The PG service currently starts on reboot (after I installed PG on my machine), however, I want the service to use a new data directory. Currently, after a reboot, I have to: Stop the currently running PG service manually type: /usr/local/pgsql/bin/pg_ctl start -D /my/preffered/data/directory -l /usr/local/pgsql/data/logfile Which file do I need to edit to ensure that I always have the service using the correct data folder?

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  • SQL Server 2005 SP4 is here!

    - by AaronBertrand
    Yes, the day has finally arrived, and a couple of weeks ahead of schedule. Typically when Microsoft promises a release in Qx or Hx, the software comes on the last or second last day of that quarter or half. This year, we get an early Christmas present: SQL Server 2005 SP4. To download SP4, go to this link: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=b953e84f-9307-405e-bceb-47bd345baece If you are looking for the Express versions of SP4, you can get Express, Express with Tools, and...(read more)

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  • Tellago 2011: Dwight, Chris and Don are MVPs

    - by gsusx
    It’s been a great start of 2011. Tellago’s Dwight Goins has been awarded as a Microsoft BizTalk Server MVP for 2011. I’ve always said that Dwight should have been an MVP a long time ago. His contributions to the BizTalk Server community are nothing but remarkable. In addition to Dwight, my colleagues Don Demsak and Chris Love also renewed their respective MVP award. A few other of us are up for renewal later in the year. As a recognition to Dwight’s award, we have made him the designated doorman...(read more)

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  • My Speaking Engagements in the Last Two Months

    - by gsusx
    I’ve been so busy lately with the activities around Moesion that I haven’t had time to blog about a couple of great conferences I had the opportunity to speak at in the last two months. Software Architect Conference, UK ( http://www.software-architect.co.uk/ ) This conference is becoming one of my favorite events of the year. As always Nick Payne and his team did a remarkable job lining up an all-star group of speakers that covered some of the hottest topics in today’s software industry. The first...(read more)

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  • Exchange Transport Service Started but not working

    - by Philippe
    Good day, Here is the problem : We are hosting a Microsoft Exchange Server. Everything working fine until recently, where the mail transport seems to go wrong. We almost have to restart the service every morning. The thing is that the transport service is started, but the mail are not delivered to the users and senders to our server get a delayed delivery notification. When we restart the service, all the mail is then delivered to the users and we're good to go for a day or two. Things I've noticed : The store service is growing to around 6 Gb of used RAM, and the w3wp.exe service is hanging around 700mb RAM. Is there a way to schedule a restart of the transport role every 4 hours or something while I'm solving the issue so I don't have to worry when I leave for the week-end? And most of all...does anyone have any idea on how to solve this issue? Thanks, Philippe

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  • Exchange Transport Service Started but not working

    - by Philippe
    Good day, Here is the problem : We are hosting a Microsoft Exchange Server. Everything working fine until recently, where the mail transport seems to go wrong. We almost have to restart the service every morning. The thing is that the transport service is started, but the mail are not delivered to the users and senders to our server get a delayed delivery notification. When we restart the service, all the mail is then delivered to the users and we're good to go for a day or two. Things I've noticed : The store service is growing to around 6 Gb of used RAM, and the w3wp.exe service is hanging around 700mb RAM. Is there a way to schedule a restart of the transport role every 4 hours or something while I'm solving the issue so I don't have to worry when I leave for the week-end? And most of all...does anyone have any idea on how to solve this issue? Thanks, Philippe

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  • DPM Coordinator Service is not responding

    - by Anatoly Vilchinsky
    Hi dear Gurus! I'm in stuck point now, so please at least try to help me. I've installed DPM 2010 on cluster server (w2k8 r2), everything was fine. Than I've tried tot install Protection Agent on both server of my cluster, but I'm getting error Error 312: The agent operation failed because the DPM Agent Coordinator service is not responding. Error details: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it (0x80070422) Recommended action: Restart the DPM Agent Coordinator service on . And the thing is that I'm totally can't see DPM Agent Coordinator service not on the localhost, nor on the second server. All the suggestion, that I've found in the internet are suggesting to restart this service, but how can I perform this if the one is absent? I'll be glad for any help

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  • Stopping the service and the babysited application before uninstalling

    - by Viv Coco
    Hi all, I have a service MyService.exe that is babysitting my application MyApp.exe, meaning it starts the application when this one crashes or whatever. Basically when the service is stopped the application is stopped (by the service) and when the service is started the application is started by the service. In order to stop my service and by that my application when uninstalling I'm doing: <ServiceControl Id='MyServiceControl' Name='MyServiceForTest' Start='install' Stop='uninstall' Remove='uninstall'/> But when I want to uninstall everything I get the error message: "The setup must update files or services that cannot be updated while the system is running. If you choose to continue, a reboot will be required to complete the setup.". If I manually stop the service before running the uninstaller I don't get this msg as both my service and my application aren't then running anymore. In the log file I noticed that this happens in InstallValidate and I get this message b/c of MyApp.exe being running. I think what happens is: the uninstallers checks the running applications, it notices that the MyService.exe and MyApp.exe are both running, detects probably that the MyService.exe will be stopped by the uninstaller itself as instructed, but doesn't know about the MyApp.exe that this one will also be terminated once the service will be stopped so it will show the reboot-message. I can't just close MyApp.exe from uninstaller b/c the service will restart it again. How could I solve this problem so that the user won't need to reboot or to manually stop the service before doing an uninstall/upgrade? Also, I can't change MyService and MyApp code anymore so I will have to do this from the (un)installer only. TIA, Viv

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  • Oracle WebCenter: Common User Experience Architecture

    - by kellsey.ruppel(at)oracle.com
    You may remember that the key goals of the new release of WebCenter are providing a Modern User Experience, unparalleled Application Integration, converging all the best of the existing portal platforms into WebCenter and delivering a Common User Experience Architecture.  In previous weeks we've provided an overview of Oracle WebCenter and discussed some of the other key goals and this week, we'll focus on how the new release of Oracle WebCenter delivers a Common User Experience Architecture.When Oracle talks about a Common User Experience Architecture, it really focuses on a core set of areas.  First, the way that information is accessed needs to be consistent and extensible so that as requirements change, the applications don't need to be rewritten for every change. Second, this information access layer needs to be securely accessible to any application, site, or any other channel that needs to leverage this information.  Third, there needs to be a consistent presentation layout, Oracle calls it a UI shell, so that all resources can fit together in a useable, productive way.  Fourth, there needs to be a common set of design patterns for how different menus, features, and services fit into this UI Shell for broad and productive usability.  Fifth, there needs to be a set of design patterns for the individual services that plug into this UI shell so that end users can move from one module of the application to another without new learning.  Finally, all of these layers need to be customizable in an easy way that insulates IT from patching and upgrading problems and allows the business owners the agility to quickly change with the market conditions.As Oracle has already announced, we will release our next generation of enterprise applications called Oracle Fusion Applications.  We have thousands of developers building these applications that all had different programming tool experience and UI design experience.  We've educated over 6,000 developers building Oracle Fusion Applications to leverage these Common User Experience Architecture patterns to speed their learning curve of the new Java standards as well as SOA principles to deliver a revolutionary new set of applications.  You could imagine the big challenge with getting all these developers with different backgrounds and different UI design skills to deliver a completely integrated application user experience.  This is why Oracle invested heavily in designing this Common User Experience Architecture, based on Oracle WebCenter and the Oracle Application Development Framework (ADF).  It pulls together the best practices and design patterns that Oracle development required in order to bring Fusion Applications to market and Oracle WebCenter is the user experience layer that all of this is surfaced through.  In this way, customers can quickly brand a deployment for new partnerships without having to redevelop a new site.  Or they can quickly add new options to the UI Shell to enable their line of business managers to quickly adapt to a new competitive product.  And with the core integration of the activities to produce a Business Activity Stream, customers are able to stay on top of all their key business actions when they happen as they happen and more importantly, the system can recommend actions or resources to help act on these activities.And we've authored this whole set of design patterns for Oracle development to take advantage of in delivering Fusion Applications.  We're also applying these design patterns to our existing eBusiness Suite, Peoplesoft, Siebel, and JD Edwards applications so that they can tie in the exact same way that Fusion Applications has been brought together.  This will provide customers with a complete Common User Experience Architecture for their entire ecosystem of applications within their enterprise whether they are from Oracle, another vender, or custom built applications. And this is all provided in the new release of Oracle WebCenter.  These design patterns cover elements around delivering a complete, aggregated menu of all the capabilities that their role allows independent of which application they are trying to access.   It means that as they move from one application to another, they will have a consistent user experience.  And if they are using an Oracle application, any customizations that are made to the application are preserved and managed through upgrades and patches.Be sure to check back this week as we share more information and resources on Oracle's Common User Experience Architecture.

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  • Know Your Service Request Status

    - by Get Proactive Customer Adoption Team
    Untitled Document To monitor a Service Request or not to monitor a Service Request... That should never be the question Monitoring the Service Requests you create is an essential part of the process to resolve your issue when you work with a Support Engineer. If you monitor your Service Request, you know at all times where it is in the process, or to be more specific, you know at all times what action the Support Engineer has taken on your request and what the next step is. When you think about it, it is rather simple... Oracle Support is working the issue, Oracle Development is working the issue, or you are. When you check on the status, you may find that the Support Engineer has a question for you or the engineer is waiting for more information to resolve the issue. If you monitor the Service Request, and respond quickly, the process keeps moving, and you’ll get your answer more quickly. Monitoring a Service Request is easy. All you need to do is check the status codes that the Support Engineer or the system assigns to your Service Request. These status codes are not static. You will see that during the life of your Service request, it will go through a variety of status codes. The best advice I can offer you when you monitor your Service Request is to watch the codes. If the status is not changing, or if you are not getting responses back within the agreed timeframes, you should review the action plan the Support Engineer has outlined or talk about a new action plan. Here are the most common status codes: Work in Progress indicates that your Support Engineer is researching and working the issue. Development Working means that you have a code related issue and Oracle Support has submitted a bug to Development. Please pay a particular attention to the following statuses; they indicate that the Support Engineer is waiting for a response from you: Customer Working usually means that your Support Engineer needs you to collect additional information, needs you to try something or to apply a patch, or has more questions for you. Solution Offered indicates that the Support Engineer has identified the problem and has provided you with a solution. Auto-Close or Close Initiated are statuses you don’t want to see. Monitoring your Service Request helps prevent your issues from reaching these statuses. They usually indicate that the Support Engineer did not receive the requested information or action from you. This is important. If you fail to respond, the Support Engineer will attempt to contact you three times over a two-week period. If these attempts are unsuccessful, he or she will initiate the Auto-Close process. At the end of this additional two-week period, if you have not updated the Service Request, your Service Request is considered abandoned and the Support Engineer will assign a Customer Abandoned status. A Support Engineer doesn’t like to see this status, since he or she has been working to solve your issue, but we know our customers dislike it even more, since it means their issue is not moving forward. You can avoid delays in resolving your issue by monitoring your Service Request and acting quickly when you see the status change. Respond to the request from the engineer to answer questions, collect information, or to try the offered solution. Then the Support Engineer can continue working the issue and the Service Request keeps moving forward towards resolution. Keep in mind that if you take an extended period of time to respond to a request or to provide the information requested, the Support Engineer cannot take the next step. You may inadvertently send an implicit message about the problem’s urgency that may not match the Service Request priority, and your need for an answer. Help us help you. We want to get you the answer as quickly as possible so you can stay focused on your company’s objectives. Now, back to our initial question. To monitor Service Requests or not to monitor Service Requests? I think the answer is clear: yes, monitor your Service Request to resolve the issue as quickly as possible.

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  • Apple Service Diagnostic application on USB key?

    - by Matt 'Trouble' Esse
    I found the following in a text file, and I would like to use the Apple Service Diagnostic Application from a bootable USB key but I cannot find where to download it or set it up? Also is this free software or does it require a separate licence? It sounds like it would be a useful tool for diagnosing Mac problems. The Apple Service Diagnostic application is designed to run both EFI and Mac OS X tests from an external USB hard drive. Apple Service Diagnostic (EFI) runs low-level tests of the hardware directly and does not require Mac OS X, while Apple Service Diagnostic (OS) uses Mac OS X to run tests. Booting and Using the Apple Service Diagnostic Application - Before using Apple Service Diagnostic, disconnect any Ethernet network, USB, and audio cables. - With the USB hard drive containing ASD 3S123 plugged into a USB port, restart the computer and hold down the option key as the computer boots up into the Startup Manager. To run ASD (EFI) select the "ASD EFI 3S123" drive icon and press return or select it with a mouse click. To run ASD (OS) select the "ASD OS 3S123" drive icon and press return or select it with a mouse click. ASD (EFI) will load in 20-30 seconds; ASD (OS) will load in 2-3 minutes. - After running ASD (OS) or ASD (EFI), press the Restart button to restart the computer back into the normal startup volume, or hold down the option key to get back to the Startup Manager. ASD is no longer delivered as an image to be restored onto a DVD. ASD 3S117 and newer versions requires installation onto an external USB hard drive. For more information, please refer to the document "Installing ASD on a USB hard drive".

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  • Confusion on networking service start/stop in Ubuntu

    - by Daniel Ball
    I'm preparing to move and took down two of my servers, leaving only one with some essential services running. What I neglected to consider was that one was the DHCP server(which I realized when somebody contacted me saying they couldn't connect. Whups). So because I only have a few hosts on this small network, I opted to just statically configure them for now. One of these is a new Ubuntu 11.04 server, where I have very little experience. I edited /etc/network/interfaces and /etc/hosts to reflect my changes. I ran $sudo /etc/init.d/networking stop *deconfiguring network interfaces ... So yay. Then I try to start, it gives me the mumbo jumbo about using services (why didn't it do that for the stop?) So instead I run ... $sudo service networking start networking stop/waiting Now, to me that says the status of the service is stopped. But when I ping another computer, I get a successful reply. So is it not actually stopped? More importantly, am I doing something wrong? Edit daniel@FOOBAR:~$ sudo service networking status networking stop/waiting daniel@FOOBAR:~$ sudo service networking stop stop: Unknown instance: daniel@FOOBAR:~$ sudo service networking status networking stop/waiting daniel@FOOBAR:~$ sudo service networking start networking stop/waiting daniel@FOOBAR:~$ sudo service networking status networking stop/waiting So you can see why I ran /etc/init.d/networking stop instead. For some reason upstart (that is what "services" is, right?) isn't working with stop. cat /etc/hosts 127.0.0.1 localhost 127.0.1.1 FOOBAR 198.3.9.2 FOOBAR #Added entry July 19 2011 # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface #auto eth0 #iface eth0 inet dhcp # hostname FOOBAR auto eth0 iface eth0 inet static address 198.3.9.2 netmask 255.255.255.0 network 198.3.9.0 broadcast 198.3.9.255 gateway 198.3.9.15 No I didn't save backups, it was just a minor change so I just commented out the old DHCP setting. Edit I set everything back to original settings and set up a DHCP server. "starting" networking does the same thing. I can only assume this is normal, I just don't know WHY. It can't be anything to do with the configuration files, since they've been restored.

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  • Common Table Expressions slow when using a table variable

    - by Phil Haselden
    I have been experimenting with the following (simplified) CTE. When using a table variable () the query runs for minutes before I cancel it. Any of the other commented out methods return in less than a second. If I replace the whole WHERE clause with an INNER JOIN it is fast as well. Any ideas why using a table variable would run so slowly? FWIW: The database contains 2.5 million records and the inner query returns 2 records. CREATE TABLE #rootTempTable (RootID int PRIMARY KEY) INSERT INTO #rootTempTable VALUES (1360); DECLARE @rootTableVar TABLE (RootID int PRIMARY KEY); INSERT INTO @rootTableVar VALUES (1360); WITH My_CTE AS ( SELECT ROW_NUMBER() OVER(ORDER BY d.DocumentID) rownum, d.DocumentID, d.Title FROM [Document] d WHERE d.LocationID IN ( SELECT LocationID FROM Location JOIN @rootTableVar rtv ON Location.RootID = rtv.RootID -- VERY SLOW! --JOIN #rootTempTable tt ON Location.RootID = tt.RootID -- Fast --JOIN (SELECT 1360 as RootID) AS rt ON Location.RootID = rt.RootID -- Fast --WHERE RootID = 1360 -- Fast ) ) SELECT * FROM My_CTE WHERE (rownum > 0) AND (rownum <= 100) ORDER BY rownum

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  • Common lisp gray streams

    - by Sid H
    Is there a tutorial on how to use gray streams? I want to create a class that reads from a file while looking for a specific set of bytes. My initial thought was to use gray streams, but could not find any starting information.

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  • WCF Self-hosted service, client clean-up on service stop

    - by Sentax
    Hi everyone, I'm curious to know how I would go about setting up my service to stop cleanly on the server the service will be installed on. For example when I have many clients connecting and doing operations every minute and I want to shut-down the service for maintenance, how can I do this in the "OnStop" event of the service to then let the main service host to deny any new client connections and let the current connections finish before it actually shuts down its services to the client, this will ensure data isn't corrupted on the server as the server shuts down. Right now I'm not setup as a singleton because I need scalability in the service. So I would have to somehow get my service host to do this independently of knowing how many instances are created of the service class. I hope I explain myself good enough, if not, let me know, I'll try to explain better. Thanks, Scott

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  • a question on common lisp

    - by kostas
    Hello people, I'm getting crazy with a small problem here, I keep getting an error and I cant seem to figure out why, the code is supposed to change the range of a list, so if we give it a list with values (1 2 3 4) and we want to change the range in 11 to fourteen the result would be (11 12 13 14) the problem is that the last function called scale-list will give back an error saying: Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil) anybody has a clue why? I use aquamacs as an editor thanks in advance ;;finds minimum in a list (defun minimum(list) (car (sort list #'<))) ;;finds maximum in a list (defun maximum(list) (car (sort list #'>))) ;;calculates the range of a list (defun range(list) (- (maximum list) (minimum list))) ;;this codes scales a value from a list (defun scale-value(list low high n) (+ (/ (* (- (nth (- n 1) list) (minimum list)) (- high low)) (range list)) low)) ;and this code is supposed to scale the whole list (defun scale-list(list low high n) (unless (= n 0) (cons (scale-value list low high n) (scale-list list low high (- n 1))))) (scale-list '(0.1 0.3 0.5 0.9) 20 30 4)

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  • Common Pitfalls in Python

    - by Anurag Uniyal
    Today I was bitten again by "Mutable default arguments" after many years. I usually don't use mutable default arguments unless needed but I think with time I forgot about that, and today in the application I added tocElements=[] in a pdf generation function's argument list and now 'Table of Content' gets longer and longer after each invocation of "generate pdf" :) My question is what other things should I add to my list of things to MUST avoid? Mutable default arguments Import modules always same way e.g. from y import x and import x are different things, they are treated as different modules. Do not use range in place of lists because range() will become an iterator anyway, the following will fail: myIndexList = [0,1,3] isListSorted = myIndexList == range(3) # will fail in 3.0 isListSorted = myIndexList == list(range(3)) # will not same thing can be mistakenly done with xrange: `myIndexList == xrange(3)`. Catching multiple exceptions try: raise KeyError("hmm bug") except KeyError,TypeError: print TypeError It prints "hmm bug", though it is not a bug, it looks like we are catching exceptions of type KeyError,TypeError but instead we are catching KeyError only as variable TypeError, use this instead: try: raise KeyError("hmm bug") except (KeyError,TypeError): print TypeError

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  • SQL: Recursively get parent records using Common Table Expressions

    - by Martijn B
    Hi there, Suposse you have to following tables where a sale consists of products and a product can be placed in multiple categories. Whereby categories have a hierachly structure like: Man Shoes Sport Casual Watches Women Shoes Sport Casual Watches Tables: Sale: id name 1 Sale1 Product: id saleidfk name 1 1 a 2 1 b 3 1 c 4 1 d 5 1 e ProductCategory : productid categoryid 1 3 2 3 3 4 4 5 5 10 Category: id ParentCategoryIdFk name 1 null Men 2 1 Shoes 3 2 Sport 4 2 Casual 5 1 Watches 6 null Women 7 6 Shoes 8 7 Sport 9 7 Casual 10 6 Watches Question: Now on my website I want to create a control where only the categories are shown of a certain sale and where the categories are filled with the products of the sale. I also want to include the hierachly structure of the categories. So if we have a leave node, recusivly go up to the top node. So with sale1 I should have a query with the following result: Men Shoes Sport Casual Watches Women Watches This thing is driving me crazy :-) Thanks in advance! Gr Martijn

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  • Remote Service Vs. Local Service

    - by Nguyen Dai Son
    Dear All, I am a newbiew to Android. I had read a lot of articles about Android Service but I am not clearly understanding what defferent between Local Service and Remote Service (except for "Local Service run in the same process as the lunching activity; remote services run in their own process" - The Busy Coder's Guide to Android Development - Mark L. Murphy ). Please shows me what different between Local Service and Remote Service. What's the advantage/disadvantage of using Local Service. What's the advantage/disadvantage of using Remote Service. Thanks & best regards Dai Son

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