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  • How does Java pick which method to call?

    - by Gaurav
    Given the following code: public class Test { public void method(Object o){ System.out.println("object"); } public void method(String s) { System.out.println("String"); } public void method() { System.out.println("blank"); } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Test test=new Test(); test.method(null); } } Java prints "String". Why is this the case?

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  • WiX - Modifying an existing service to be dependent on the service I am installing

    - by Paul Nearney
    Hi all, Using Wix3, its trivial to ensure that a windows service being installed is given a dependency on a service that is already installed on the target machine, but I need to do the opposite - i.e. as part of my install I need to modify the service dependencies of an existing service (i.e. already installed on the target machine), to ensure that that service is dependent on the service I am installing. Is there a simple way to do this using WiX? or will I need to write a custom action? Many thanks, Paul

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  • Tips On Using The Service Contracts Import Program

    - by LuciaC
    Prior to release 12.1 there was no supported way to import contracts into the EBS Service Contracts application - there were no public APIs nor contract load programs provided.  From release 12.1 onwards the 'Service Contracts Import Program' is provided to load service contracts into the application. The Service Contracts Import functionality is explained in How to Use the Service Contracts Import Program - Scope and Limitations (Doc ID 1057242.1).  This note includes an attached document which explains the program architecture, shows the Entity Relationship Diagram and details the interface table definitions. The Import program takes data from the interface tables listed below and populates the contracts schema tables:  OKS_USAGE_COUNTERS_INTERFACE OKS_SALES_CREDITS_INTERFACEOKS_NOTES_INTERFACEOKS_LINES_INTERFACEOKS_HEADERS_INTERFACEOKS_COVERED_LEVELS_INTERFACEThese interface tables must be loaded via a custom load program.The Service Contracts Import concurrent request is then submitted to create contracts from this legacy data. The parameters to run the Import program are:  Parameter Description  Mode Validate only, Import  Batch Number Batch_Id (unique id populated into the OKS_HEADERS_INTERFACE table)  Number of Workers Number of workers required (these are spawned as separate sub-requests)  Commit size Represents number of successfully processed contracts commited to database The program spawns sub-requests for the import worker(s) and the 'Service Contracts Import Report'.  The data is validated prior to import and into the Contracts tables and will report errors in the Service Contracts Import Report program output file (Import Execution Report).  Troubleshooting tips are provided in R12.1 - Common Service Contract Import Errors (Doc ID 762545.1); this document lists some, but not all, import errors.  The document will be updated over time.  Additional help is given in Debugging Tip for Service Contracts Import Errors (Doc ID 971426.1).After you successfully import contracts, you can purge the records from the interface tables by running the Service Contracts Import Purge concurrent program. Note that there is no supported way to mass delete data from the Contracts schema tables once they are populated, so data loaded by the Import program must be fully tested and verified before the program is run to load data into a Production system.A Service Contracts Import Test program has been provided which will take an existing contract in the application and load the interface tables using the data from that contract.  This can be used as an example for guidance on how to load the interface tables.  The Test program functionality is explained in How to Use the Service Contracts Test Import Program Provided in Release 12.1 (Doc ID 761209.1).  Note that the Test program has some limitations which do not apply to the full Import program and is not a supported program, it is simply a testing tool.  

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  • Using NServiceBus behind a custom web service

    - by Michael Stephenson
    In this post I'd like to talk about an architecture scenario we had recently and how we were able to utilise NServiceBus to help us address this problem. Scenario Cognos is a reporting system used by one of my clients. A while back we developed a web service façade to allow line of business applications to be able to access reports from Cognos to support their various functions. The service was intended to provide access to reports which were quick running reports or pre-generated reports which could be accessed real-time on demand. One of the key aims of the web service was to provide a simple generic interface to allow applications to get any report without needing to worry about the complex .net SDK for Cognos. The web service also supported multi-hop kerberos delegation so that report data could be accesses under the context of the end user. This service was working well for a period of time. The Problem The problem we encountered was that reports were now also required to be available to batch processes. The original design was optimised for low latency so users would enjoy a positive experience, however when the batch processes started to request 250+ concurrent reports over an extended period of time you can begin to imagine the sorts of problems that come into play. The key problems this new scenario caused are: Users may be affected and the latency of on demand reports was significantly slower The Cognos infrastructure was not scaled sufficiently to be able to cope with these long peaks of load From a cost perspective it just isn't feasible to scale the Cognos infrastructure to be able to handle the load when it is only for a couple of hour window each night. We really needed to introduce a second pattern for accessing this service which would support high through-put scenarios. We also had little control over the batch process in terms of being able to throttle its load. We could however make some changes to the way it accessed the reports. The Approach My idea was to introduce a throttling mechanism between the Web Service Façade and Cognos. This would allow the batch processes to push reports requests hard at the web service which we were confident the web service can handle. The web service would then queue these requests and process them behind the scenes and make a call back to the batch application to provide the report once it had been accessed. In terms of technology we had some limitations because we were not able to use WCF or IIS7 where the MSMQ-Activated WCF services could have helped, but we did have MSMQ as an option and I thought NServiceBus could do just the job to help us here. The flow of how this would work was as follows: The batch applications would send a request for a report to the web service The web service uses NServiceBus to send the message to a Queue The NServiceBus Generic Host is running as a windows service with a message handler which subscribes to these messages The message handler gets the message, accesses the report from Cognos The message handler calls back to the original batch application, this is decoupled because the calling application provides a call back url The report gets into the batch application and is processed as normal This approach looks something like the below diagram: The key points are an application wanting to take advantage of the batch driven reports needs to do the following: Implement our call back contract Make a call to the service providing a call back url Provide a correlation ID so it knows how to tie each response back to its request What does NServiceBus offer in this solution So this scenario is not the typical messaging service bus type of solution people implement with NServiceBus, but it did offer the following: Simplified interaction with MSMQ Offered the ability to configure the number of processes working through the queue so we could find a balance between load on Cognos versus the applications end to end processing time NServiceBus offers retries and a way to manage failed messages NServiceBus offers a high availability setup The simple thing is that NServiceBus gave us the platform to build the solution on. We just implemented a message handler which functionally processed a message and we could rely on NServiceBus to do all of the hard work around managing the queues and all of the lower level things that would have took ages to write to any kind of robust level. Conclusion With this approach we were able to deal with a fairly significant performance issue with out too much rework. Hopefully this write up gives people some insight into ideas on how to leverage the excellent NServiceBus framework to help solve integration and high through-put scenarios.

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  • Installed Apache. Bash: 'service httpd status' does nothing,

    - by Josh
    I just installed Apache 2 on CentOS5 from source (httpd-2.2.15.tar.gz) using: ./configure --prefix=/usr/local/apache make make install /usr/local/apache/bin/apachectl start I have verified that httpd is running in ps, and verified it is serving the default htdocs page. However, Apache is not found in 'service --status-all' and is not found in '/etc/init.d', so I cannot run 'service httpd status' or '/etc/init.d/httpd start', and other commands. Any ideas what I am missing?

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  • Running a Web Service

    - by Brandon
    I have a web service created in .NET. I thought I had setup everything correctly based on a set of instructions I followed but for some reason I'm getting: "Not Found" when I try to load in my browser http://localhost/myservice/webservice.aspx. Someone said that I have to configure IIS for Aspx files. I don't know how to do that. I need to know how to do that and I need help on setting up this web service

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  • Problems creating service using sc.exe

    - by Shoko
    I have this command to create a service: sc create svnserve binpath="\"C:\Program Files (x86)\Subversion\bin\svnserve.exe\" --service --root C:\SVNRoot" displayname="Subversion" depend=tcpip start=auto obj="NT AUTHORITY\LocalService" Unfortunately, it seems not to work, even though the syntax is correct. When I run it, I get the usage instructions (which I guess is a way of telling me that I've supplied incorrect arguments, although I have no idea what incorrect argument I might have supplied). Can anyone help me out of my difficulty? Thanks!

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  • Add Clamd as a service to CentOS?

    - by Josh
    As I understand I think I need to add something to init.d, but I am not sure what to add. At the moment to start clamav I have to do clamd start. I would like it as a service so I can start it on run level 3 as a service. I realize I could probably do this through a shell script in the right runlevel, but I would like to be able to use chkconfig to configure it.

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  • Server Vs Service / Physical Vs Virtual

    - by user559142
    When reading definitions for a server service (e.g. iis) you will often find that there are several cross references to a virtual server but none seem to definitively refer to the two as the same..... Can somebody help me to understand the differences - I cannot get my head around what the difference between each is? Ideally I would like to know the differences between the following/or indeed if any refer to the same... 1) Logical Server 2) Virtual Host 3) Logical Partition 4) Physical Server Vs Virtual Server 5) Server Service Vs Virtual Host

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  • onServiceConnected never called after bindService method

    - by Tobia Loschiavo
    Hi, I have a particular situation: a service started by a broadcast receiver starts an activity. I want to make it possible for this activity to communicate back to the service. I have chosen to use AIDL to make it possible. Everything seems works good except for bindService() method called in onCreate() of the activity. bindService(), in fact, throws a null pointer exception because onServiceConnected() is never called while onBind() method of the service is. Anyway bindService() returns true. The service is obviously active because it starts the activity. I know that calling an activity from a service could sound strange, but unfortunately this is the only way to have speech recognition in a service. Thanks in advance

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  • Enterprise Service Bus, .NET Service Bus, NServiceBus and the wheels on the bus...

    - by Chris Marisic
    Enterprise Service Bus (ESB), .NET Service Bus, NServiceBus, RhinoServiceBus, MassTransit and so on. I'm trying to understand what each of these technologies have in common or not in common. I attended Juval Löwy's presentation on the .NET Service Bus earlier today and he stated that the .NET Service Bus could be used as a poor man's version of an ESB, so I would take that to mean that the .NET Service Bus is NOT an ESB, are any of the others a true ESB? If any of the others are a true ESB what would make them a true ESB as opposed to the .NET Service Bus?

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  • Howto - Running Redmine on mongrel as a service on windows

    - by Achilles
    I use Redmine on Mongrel as a project manager and I use a batch file (start-redmine.bat) to start the redmine in mongrel. There are 2 issues with my setup: 1. I have a running IIS on the server that occupies the HTTP port (80) 2. The start-redmine.bat must be periodically checked to see if it's stopped after a restart that is caused by windows update service. for the first issue, I have no choice but running mongrel on a port like 3000 and for the second issue I have to create a windows service that runs automatically in the background when the windows starts; and here comes the trouble! There are at least 3 ways to run redmine as a service that I'm aware of; none of them can satisfy a performance view on this subject. you may read about them on http://stackoverflow.com/questions/877943/how-to-configure-a-rails-app-redmine-to-run-as-a-service-on-windows I tried them all. The easiest way to setup such a service is using mongrel_service approach; in 3 lines of command you're done. but the performance is significantly lower than running that batch file... Now, I wanna show you my approach: First suppose we have ruby installed into c:\ruby and we have issued the command gem install mongrel to get the mongrel gem installed into c:\ruby\bin Also, suppose we have installed the Redmine into a folder like c:\redmine; and we have ruby's path (i.e. c:\ruby\bin) in our PATH environment variable. Now Download and install the Windows NT Resource Kit Tools from microsoft website. Open the command-line tool that comes with the Resource Kit (from start menu). Use instsrv to install a dummy service called Redmine using the following command: "[path-to-instsrv.exe]\instsrv" Redmine "[path-to-srvany.exe]\srvany.exe" in my case (which is the default case) it was something like this: "C:\Program Files\Windows Resource Kits\Tools\instsrv" Redmine "C:\Program Files\Windows Resource Kits\Tools\srvany.exe" Now create the batch file. Open a notepad and paste these instructions into it and then save it as "c:\redmine\start-redmine.bat" @echo off cd c:\redmine\ mongrel_rails start -a 0.0.0.0 -p 3000 -e production Now we need to configure that dummy service we had created before. WATCH OUT WHAT YOU'RE DOING FROM HERE ON, OR YOU MAY CORRUPT YOUR WINDOWS. To configure that service, open windows registry editor (Start - Run - regedit) and navigate to this node: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Redmine Right-Click on "Redmine" node and using the context menu, create a new key called Parameters (New - Key) Right-Click on "Parameters" and create a String Value property called Application. Do this again and create another String Value called AppParameters. Now Double-click on "Application" and put cmd.exe into "Value data" section. Then Double-click on "AppParameters" and put /C "C:\redmine\start-redmine.bat" into Value data section. We're done! issue this command to run the redmine on mongrel as a service: net start Redmine

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  • Web Service in c# - "This web service is using http://tempuri.org/ as its default namespace."

    - by glenatron
    I've created a web service using Visual Studio ( 2005 - I know I'm old school ) and it all compiles fine but when it opens I get warned thus: This web service does not conform to WS-I Basic Profile v1.1. And furthermore: This web service is using http://tempuri.org/ as its default namespace. Which would be fine except my service begins thus: [WebService(Namespace = "http://totally-not-default-uri.com/servicename")] Searching the entire solution folder for "tempuri" returns nothing. I can't find it mentioned in any configuration page acessible from Visual Studio. And yet it's right there in the wsdl:definitions list for the xmlns:tns attribute on the web service descriptor page when I view it through the browser and as targetNamespace in the same tag. I'm viewing it using Visual Studio's "debug" mode with the built in server from that. Seems like something has got cached somewhere but I can't work out what and where- I've tried stopping and restarting the server, cleaning and rebuilding the service and going through the associated text config files with a text editor but no dice. Any idea what is going on?

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  • Ruby module_function, invoking module's private method, invoked in class method style on module shows error

    - by Jignesh
    test_module.rb module MyModule def module_func_a puts "module_func_a invoked" private_b end module_function :module_func_a private def private_b puts "private_b invoked" end end class MyClass include MyModule def test_module module_func_a end end Invoking module function from class c = MyClass.new c.test_module Output 1: $ ruby test_module.rb module_func_a invoked private_b invoked Invoking module function on module in class method style ma = MyModule.module_func_a Output 2: module_func_a invoked test_module.rb:5:in `module_func_a': undefined local variable or method `private_b' for MyModule:Module (NameError) from test_module.rb:31 As can be seen from the Output 1 and Output 2 when including the module in a class, no issue occurs when a module's private method gets invoked from a module function while in case when directly invoking the module function on the module in class method style the module's private method, invoked from module function, is not found. Can anybody make me understand the reason behind above behavior and whether invoking module function (which in turn invokes module's private method) on module in class method style is possible or not? If possible, then what rectifications are required in my code to do the same? Thanks, Jignesh

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  • Inheriting the main method

    - by Eric
    I want to define a base class that defines a main method that instantiates the class, and runs a method. There are a couple of problems though. Here is the base class: public abstract class Strategy { abstract void execute(SoccerRobot robot); public static void main(String args) { Strategy s = new /*Not sure what to put here*/(); s.execute(new SoccerRobot()) } } And here is an example derived class: public class UselessStrategy { void execute(SoccerRobot robot) { System.out.println("I'm useless") } } It defines a simple execute method, which should be called in a main method upon usage as a the main application. However, in order to do so, I need to instantiate the derived class from within the base class's main method. Which doesn't seem to be possible. I'd rather not have to repeat the main method for every derived class, as it feels somewhat unnessary. Is there a right way of doing this?

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  • ASMX Web Service - "This web service is using http://tempuri.org/ as its default namespace." message

    - by glenatron
    I've created a web service using Visual Studio ( 2005 - I know I'm old school ) and it all compiles fine but when it opens I get warned thus: This web service does not conform to WS-I Basic Profile v1.1. And furthermore: This web service is using http://tempuri.org/ as its default namespace. Which would be fine except my service begins thus: [WebService(Namespace = "http://totally-not-default-uri.com/servicename")] Searching the entire solution folder for "tempuri" returns nothing. I can't find it mentioned in any configuration page acessible from Visual Studio. And yet it's right there in the wsdl:definitions list for the xmlns:tns attribute on the web service descriptor page when I view it through the browser and as targetNamespace in the same tag. I'm viewing it using Visual Studio's "debug" mode with the built in server from that. Seems like something has got cached somewhere but I can't work out what and where- I've tried stopping and restarting the server, cleaning and rebuilding the service and going through the associated text config files with a text editor but no dice. Any idea what is going on?

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  • c# passing method names as the argument in a method

    - by Alan Bennett
    hi guys, I have a recuring method which shows up many times in my code its basically checking to make sure that the connection to the odbc is ok and then connects but each time this method is called it calls another method and each instance of the main method this one is different, as each method is about 8 lines of code having it 8 times in the code isnt ideal. so basically i would like to have just one method which i can call passing the name of the new method as an arguement. so basically like: private void doSomething(methodToBeCalled) { if(somthingistrue) { methodToBeCalled(someArgument) } } is this possible? thanks in advance

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  • Setting up Group Managed Service Account on Windows Server 2012 R2

    - by Moo MinTroll
    I have a Windows 2012 R2 domain controller called cox.win.testlab. I have set up a group of hosts where I would like to use a gMSA (Group Managed Service Account). This group is called SQLManagedHosts. I created the account by following these steps in Powershell on the domain controller: PS C:\Windows\system32> Add-KdsRootKey -EffectiveTime ((get-date).addhours(-10)) Guid ---- 9b68b1e7-db76-c4e4-4978-63c2965e5596 PS C:\Windows\system32> New-ADServiceAccount mSQL -DNSHostName cox.win.testlab -PrincipalsAllowedToRetrieveManagedPassword SQLManagedHosts PS C:\Windows\system32> Get-ADServiceAccount msql DistinguishedName : CN=mSQL,CN=Managed Service Accounts,DC=win,DC=testlab Enabled : True Name : mSQL ObjectClass : msDS-GroupManagedServiceAccount ObjectGUID : cf9df74a-38e0-4d7a-856e-9af882b08800 SamAccountName : mSQL$ SID : S-1-5-21-3443997112-87545443-1733229669-1602 UserPrincipalName : On one of the hosts listed in SQLManagedHosts, I ran: PS C:\Windows\system32> Install-ADServiceAccount msql Install-ADServiceAccount : Cannot install service account. Error Message: 'An unspecified error has occurred'. At line:1 char:1 + Install-ADServiceAccount msql + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : WriteError: (mSQL:String) [Install-ADServiceAccount], ADException + FullyQualifiedErrorId : InstallADServiceAccount:PerformOperation:InstallServiceAcccountFailure,Microsoft.ActiveDirectory.Management.Commands.InstallADServiceAccount Any ideas why it might be failing? All servers involved are Windows Server 2012 R2.

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  • How essential is it to make a service layer?

    - by BornToCode
    I started building an app in 3 layers (DAL, BL, UI) [it mainly handles CRM, some sales reports and inventory]. A colleague told me that I must move to service layer pattern, that developers came to service pattern from their experience and it is the better approach to design most applications. He said it would be much easier to maintain the application in the future that way. Personally, I get the feeling that it's just making things more complex and I couldn't see much of a benefit from it that would justify that. This app does have an additional small partial ui that uses some (but only few) of the desktop application functions so I did find myself duplicating some code (but not much). Just because of some code duplication I wouldn't convert it to be service oriented, but he said I should use it anyway because in general it's a very good architecture, why programmers are so in love with services?? I tried to google on it but I'm still confused and can't decide what to do.

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  • SQL Server 2012 Service Pack 1 is available - this time for sure!

    - by AaronBertrand
    Last week I mentioned in passing that Service Pack 1 is now available, while I was blogging from the PASS Summit keynote . I wanted to put up an official post instead of having it appear as a footnote there (I also updated my April Fools' joke to point to the right place). Service Pack 1 Details Service Pack 1 is build # 11.0.3000 and includes 13 fixes to public KB items and 35 other internal (VSTS) items. You can see the list of fixes in KB #2674319 . You can also read about new features included...(read more)

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  • What's the difference between "Service" and "/etc/init.d/"?

    - by Marco Ceppi
    I've been managing server installations both on and off Ubuntu flavor for some time - I've become quite adjusted to /etc/init.d/ for restarting servcies. Now I get this message: root@tatooine:~# /etc/init.d/mysql status Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service mysql status Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the status(8) utility, e.g. status mysql mysql start/running, process 14048 This seems to have been brought about in the latest LTS of Ubuntu - why? What's so bad about /etc/init.d/ and what/is there a difference between service and /etc/init.d/?

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  • SQL Server 2012 Service Pack 1 Cumulative Update #1 is available!

    - by AaronBertrand
    Waited to deploy SQL Server 2012 until Service Pack 1 was released? Then held off because Service Pack 1 did not include important updates from Cumulative Update #3 and Cumulative Update #4 ? You're running out of reasons to procrastinate! The SQL Server team has released CU #1 for Service Pack 1, which should include all of the fixes from CU #3 & CU #4, as well as some others. KB article: KB #2765331 Build # is 11.0.3321 I count a whopping 44 fixes! Relevant for builds 11.0.3000 -> 11.0.3320....(read more)

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