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• Best practice how to store HTML in a database column

  - by tbrandao

  I have an application that modifies a table dynamically, think spreadsheet), then upon saving the form (which the table is part of) ,I store that changed table (with user modifications) in a database column named html_Spreadhseet,along with the rest of the form data. right now I'm just storing the html in a plain text format with basic escaping of characters... I'm aware that this could be stored as a separate file, the source table (html_workseeet) already is. But from a data handling perspective its easier to save the changed html table to and from a column so as to avoid having to come up with a file management strategy (which folder will this live in, now must include folder in backups, security issues now need to apply to files, how to sync db security with file system etc.), so to minimize these issues I'm only storing the ... part in the database column. My question is should I gzip the HTML , maybe use JSON, or some other format to easily store and retrieve the HTML from the database column, what is the best practice to store HTML content in a datbase? Or just store it as I currently am as an escaped text column?

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• Internal Java code best practice for dealing with invalid REST API parameters

  - by user326389

  My colleague wrote the following stackoverflow question: other stack overflow question on this topic The question seems to have been misinterpreted and I want to find out the answer, so I'm starting this new question... hopefully a little more clear. Basically, we have a REST API. Users of our API call our methods with parameters. But sometimes users call them with the wrong parameters!! Maybe a mistake in their code, maybe they're just trying to play with us, maybe they're trying to see how we respond, who knows! We respond with HTTP status error codes and maybe a detailed description of the invalid parameter in the XML response. All is well. But internally we deal with these invalid parameters by throwing exceptions. For example, if someone looks up a Person object by giving us their profile id, but the profile id doesn't exist... we throw a PersonInvalidException when looking them up. Then we catch this exception in our API controller and send back an HTTP 400 status error code. Our question is... is this the best practice, throwing exceptions internally for this kind of user error? These exceptions never get propogated back to the user, this is a REST API. They only make our code cleaner. Otherwise we could have a validation method in each of our API controllers to make sure the parameters all make sense, but that seems inefficient. We have to look up things in our database potentially twice. Or we could return nulls and check for them, but that sucks... What are your thoughts?

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• Best practice for debug Asserts during Unit testing

  - by Steve Steiner

  Does heavy use of unit tests discourage the use of debug asserts? It seems like a debug assert firing in the code under test implies the unit test shouldn't exist or the debug assert shouldn't exist. "There can be only one" seems like a reasonable principle. Is this the common practice? Or do you disable your debug asserts when unit testing, so they can be around for integration testing? Edit: I updated 'Assert' to debug assert to distinguish an assert in the code under test from the lines in the unit test that check state after the test has run. Also here is an example that I believe shows the dilema: A unit test passes invalid inputs for a protected function that asserts it's inputs are valid. Should the unit test not exist? It's not a public function. Perhaps checking the inputs would kill perf? Or should the assert not exist? The function is protected not private so it should be checking it's inputs for safety.

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• Programming logic best practice - redundant checks

  - by eldblz

  I'm creating a large PHP project and I've a trivial doubt about how to proceed. Assume we got a class books, in this class I've the method ReturnInfo: function ReturnInfo($id) { if( is_numeric($id) ) { $query = "SELECT * FROM books WHERE id='" . $id . "' LIMIT 1;"; if( $row = $this->DBDrive->ExecuteQuery($query, $FetchResults=TRUE) ) { return $row; } else { return FALSE; } } else { throw new Exception('Books - ReturnInfo - id not valid.'); } } Then i have another method PrintInfo function PrintInfo($id) { print_r( $this->ReturnInfo($id) ); } Obviously the code sample are just for example and not actual production code. In the second method should I check (again) if id is numeric ? Or can I skip it because is already taken care in the first method and if it's not an exception will be thrown? Till now I always wrote code with redundant checks (no matter if already checked elsewhere i'll check it also here) Is there a best practice? Is just common sense? Thank you in advance for your kind replies.

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• Best practice when removing entity regarding mappedBy collections?

  - by Daniel Bleisteiner

  I'm still kind of undecided which is the best practice to handle em.remove(entity) with this entity being in several collections mapped using mappedBy in JPA. Consider an entity like a Property that references three other entities: a Descriptor, a BusinessObject and a Level entity. The mapping is defined using @ManyToOne in the Property entity and using @OneToMany(mappedBy...) in the other three objects. That inverse mapping is defined because there are some situations where I need to access those collections. Whenever I remove a Property using em.remove(prop) this element is not automatically removed from managed entities of the other three types. If I don't care about that and the following page load (webapp) doesn't reload those entities the Property is still found and some decisions might be taken that are no longer true. The inverse mappings may become quite large and though I don't want to use something like descriptor.getProperties().remove(prop) because it will load all those properties that might have been lazy loaded until then. So my currently preferred way is to refresh the entity if it is managed: if (em.contains(descriptor)) em.refresh(descriptor) - which unloads a possibly loaded collection and triggers a reload upon the next access. Is there another feasible way to handle all those mappedBy collections of already loaded entites?

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• Safe way for getting/finding a vertex in a graph with custom properties -> good programming practice

  - by Shadow

  Hi, I am writing a Graph-class using boost-graph-library. I use custom vertex and edge properties and a map to store/find the vertices/edges for a given property. I'm satisfied with how it works, so far. However, I have a small problem, where I'm not sure how to solve it "nicely". The class provides a method Vertex getVertex(Vertexproperties v_prop) and a method bool hasVertex(Vertexproperties v_prop) The question now is, would you judge this as good programming practice in C++? My opinion is, that I have first to check if something is available before I can get it. So, before getting a vertex with a desired property, one has to check if hasVertex() would return true for those properties. However, I would like to make getVertex() a bit more robust. ATM it will segfault when one would directly call getVertex() without prior checking if the graph has a corresponding vertex. A first idea was to return a NULL-pointer or a pointer that points past the last stored vertex. For the latter, I haven't found out how to do this. But even with this "robust" version, one would have to check for correctness after getting a vertex or one would also run into a SegFault when dereferencing that vertex-pointer for example. Therefore I am wondering if it is "ok" to let getVertex() SegFault if one does not check for availability beforehand?

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• Programming Practice

  - by deepti

  public DataTable UserUpdateTempSettings(int install_id, int install_map_id, string Setting_value,string LogFile) { SqlConnection oConnection = new SqlConnection(sConnectionString); DataSet oDataset = new DataSet(); DataTable oDatatable = new DataTable(); SqlDataAdapter MyDataAdapter = new SqlDataAdapter(); try { oConnection.Open(); cmd = new SqlCommand("SP_HOTDOC_PRINTTEMPLATE_PERMISSION", oConnection); cmd.Parameters.Add(new SqlParameter ("@INSTALL_ID", install_id)); cmd.Parameters.Add(new SqlParameter ("@INSTALL_MAP_ID", install_map_id)); cmd.Parameters.Add(new SqlParameter("@SETTING_VALUE", Setting_value)); if (LogFile != "") { cmd.Parameters.Add(new SqlParameter("@LOGFILE",LogFile)); } cmd.CommandType = CommandType.StoredProcedure; MyDataAdapter.SelectCommand = cmd; cmd.ExecuteNonQuery(); MyDataAdapter.Fill(oDataset); oDatatable = oDataset.Tables[0]; return oDatatable; } catch (Exception ex) { Utils.ShowError(ex.Message); return oDatatable; } finally { if ((oConnection.State != ConnectionState.Closed) || (oConnection.State != ConnectionState.Broken)) { oConnection.Close(); } oDataset = null; oDatatable = null; oConnection.Dispose(); oConnection = null; } } i have used execute non query.. normally its not used with data adapter... if iam not using its giving me error.. is it bad programming practice to use execute non query with data adapter

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• Hibernate Performance Best Practice?

  - by user829237

  Im writing a Web application using Hibernate 3. So, after a while i noticed that something was slow. So i tested hibernate profiler and found that hibernate will make unreasonably many db-calls for simple operation. The reason is ofcourse that i load an Object (this object has several "parents") and these "parents" have other "parents". So basicly hibernate loads them all, even though i just need the basic object. Ok, so i looked into lazy-loading. Which lead me into the Lazyloading-exception, because i have a MVC webapp. So now i'm a bit confused as to what is my best approach to this. Basicly all I need is to update a single field on an object. I already have the object-key. Should I: 1. Dig into Lazy-loading. And then rewrite my app for a open-session-view? 2. Dig into lazy-loading. And then rewrite my dao's to be more specific. E.g. writing DAO-methods that will return objects instanciated with only whats necessary for each use-case? Could be a lot of extra methods... 3. Scratch hibernate and do it myself? 4. Cant really think of other solutions right now. Any suggestions? What is the best practice?

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• JS best practice for member functions

  - by MickMalone1983

  I'm writing a little mobile games library, and I'm not sure the best practice for declaring member functions of instantiated function objects. For instance, I might create a simple object with one property, and a method to print it: function Foo(id){ this.id = id; this.print = function(){ console.log(this.id); }; }; However, a function which does not need access to 'private' members of the function does not need to be declared in the function at all. I could equally have written: function print(){ console.log(this.id); }; function Foo(id){ this.id = id; this.print = print; }; When the function is invoked through an instance of Foo, the instance becomes the context for this, so the output is the same in either case. I'm not entirely sure how memory is allocated with JS, and I can't find anything that I can understand about something this specific, but it seems to me that with the first example all members of Foo, including the print function, are duplicated each time it is instantiated - but with the second, it just gets a pointer to one, pre-declared function, which would save any more memory having to be allocated as more instances of Foo are created. Am I correct, and if I am, is there any memory/performance benefit to doing this?

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• Best practice way to handle variable content margin?

  - by Aithne

  Ok, so a quick site that I am throwing together for a friend has about 20 static pages. Each one with a small amount of content. the div Container contains, well, the div Content, and the div Content contains, obviously, the content that changes on each page. Now, depending on the length of the content, I want a different margin at the top. The less content, then the larger the margin. Simply an aesthetic choice. For example, if the content almost fills the static sized container, there is less padding, but a 1 line page of content might be 1/3 of the way down the static container. Centering the content in the div wont do, as that creates too large of a margin. Whats the best way to handle this? A new class for each content with a different margin? A new Id, so that it is in its own special div positioned or margined differently? Inline css on each page to override the standard css for div Content? A differnt spacer div inside Container before Content on each page? Some sort of scripting along the lines of margin of Content = (ContainerHeight - ContentHeight) / 3? Whats the acceptable way of doing this? I don't want to get into bad habits.

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• BAD DC transfering FSMO Roles to ADC

  - by Suleman

  I have a DC (FQDN:server.icmcpk.local) and an ADC (FQDN:file-server.icmcpk.local). Recently my DC is facing a bad sector problem so I changed the Operation Masters to file-server for all five roles. but when ever i turn off the OLD DC the file-server also stops wroking with AD and GPMC further i m also unable to join any other computer to this domain. For Test purpose i also added a new ADC (FQDN:wds-server.icmcpk.local) but no succes with the old DC off i had to turn the old DC on and then joined it. I m attaching the Dcdiags for all three servers. Kindly help me so that i b able to reinstall new HDD and it can go online again. --------------------------------------- Server --------------------------------------- C:\Program Files\Support Tools>dcdiag Domain Controller Diagnosis Performing initial setup: Done gathering initial info. Doing initial required tests Testing server: Default-First-Site-Name\SERVER Starting test: Connectivity ......................... SERVER passed test Connectivity Doing primary tests Testing server: Default-First-Site-Name\SERVER Starting test: Replications [Replications Check,SERVER] A recent replication attempt failed: From FILE-SERVER to SERVER Naming Context: DC=ForestDnsZones,DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. [Replications Check,SERVER] A recent replication attempt failed: From WDS-SERVER to SERVER Naming Context: DC=ForestDnsZones,DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. [Replications Check,SERVER] A recent replication attempt failed: From FILE-SERVER to SERVER Naming Context: DC=DomainDnsZones,DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. [Replications Check,SERVER] A recent replication attempt failed: From WDS-SERVER to SERVER Naming Context: DC=DomainDnsZones,DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. [Replications Check,SERVER] A recent replication attempt failed: From FILE-SERVER to SERVER Naming Context: CN=Schema,CN=Configuration,DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. [Replications Check,SERVER] A recent replication attempt failed: From WDS-SERVER to SERVER Naming Context: CN=Schema,CN=Configuration,DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. [Replications Check,SERVER] A recent replication attempt failed: From WDS-SERVER to SERVER Naming Context: DC=icmcpk,DC=local The replication generated an error (1908): Could not find the domain controller for this domain. The failure occurred at 2012-05-04 14:07:13. The last success occurred at 2012-05-04 13:48:39. 1 failures have occurred since the last success. Kerberos Error. A KDC was not found to authenticate the call. Check that sufficient domain controllers are available. ......................... SERVER passed test Replications Starting test: NCSecDesc ......................... SERVER passed test NCSecDesc Starting test: NetLogons ......................... SERVER passed test NetLogons Starting test: Advertising ......................... SERVER passed test Advertising Starting test: KnowsOfRoleHolders ......................... SERVER passed test KnowsOfRoleHolders Starting test: RidManager ......................... SERVER passed test RidManager Starting test: MachineAccount ......................... SERVER passed test MachineAccount Starting test: Services ......................... SERVER passed test Services Starting test: ObjectsReplicated ......................... SERVER passed test ObjectsReplicated Starting test: frssysvol ......................... SERVER passed test frssysvol Starting test: frsevent There are warning or error events within the last 24 hours after the SYSVOL has been shared. Failing SYSVOL replication problems may cause Group Policy problems. ......................... SERVER failed test frsevent Starting test: kccevent ......................... SERVER passed test kccevent Starting test: systemlog An Error Event occured. EventID: 0x80001778 Time Generated: 05/04/2012 14:05:39 Event String: The previous system shutdown at 1:26:31 PM on An Error Event occured. EventID: 0x825A0011 Time Generated: 05/04/2012 14:07:45 (Event String could not be retrieved) An Error Event occured. EventID: 0x00000457 Time Generated: 05/04/2012 14:13:40 (Event String could not be retrieved) An Error Event occured. EventID: 0x00000457 Time Generated: 05/04/2012 14:14:25 (Event String could not be retrieved) An Error Event occured. EventID: 0x00000457 Time Generated: 05/04/2012 14:14:25 (Event String could not be retrieved) An Error Event occured. EventID: 0x00000457 Time Generated: 05/04/2012 14:14:38 (Event String could not be retrieved) An Error Event occured. EventID: 0xC1010020 Time Generated: 05/04/2012 14:16:14 Event String: Dependent Assembly Microsoft.VC80.MFCLOC could An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:16:14 Event String: Resolve Partial Assembly failed for An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:16:14 Event String: Generate Activation Context failed for An Error Event occured. EventID: 0xC1010020 Time Generated: 05/04/2012 14:16:14 Event String: Dependent Assembly Microsoft.VC80.MFCLOC could An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:16:14 Event String: Resolve Partial Assembly failed for An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:16:14 Event String: Generate Activation Context failed for An Error Event occured. EventID: 0x825A0011 Time Generated: 05/04/2012 14:22:57 (Event String could not be retrieved) An Error Event occured. EventID: 0xC1010020 Time Generated: 05/04/2012 14:22:59 Event String: Dependent Assembly Microsoft.VC80.MFCLOC could An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:22:59 Event String: Resolve Partial Assembly failed for An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:22:59 Event String: Generate Activation Context failed for An Error Event occured. EventID: 0xC1010020 Time Generated: 05/04/2012 14:22:59 Event String: Dependent Assembly Microsoft.VC80.MFCLOC could An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:22:59 Event String: Resolve Partial Assembly failed for An Error Event occured. EventID: 0xC101003B Time Generated: 05/04/2012 14:22:59 Event String: Generate Activation Context failed for ......................... SERVER failed test systemlog Starting test: VerifyReferences ......................... SERVER passed test VerifyReferences Running partition tests on : ForestDnsZones Starting test: CrossRefValidation ......................... ForestDnsZones passed test CrossRefValidation Starting test: CheckSDRefDom ......................... ForestDnsZones passed test CheckSDRefDom Running partition tests on : DomainDnsZones Starting test: CrossRefValidation ......................... DomainDnsZones passed test CrossRefValidation Starting test: CheckSDRefDom ......................... DomainDnsZones passed test CheckSDRefDom Running partition tests on : Schema Starting test: CrossRefValidation ......................... Schema passed test CrossRefValidation Starting test: CheckSDRefDom ......................... Schema passed test CheckSDRefDom Running partition tests on : Configuration Starting test: CrossRefValidation ......................... Configuration passed test CrossRefValidation Starting test: CheckSDRefDom ......................... Configuration passed test CheckSDRefDom Running partition tests on : icmcpk Starting test: CrossRefValidation ......................... icmcpk passed test CrossRefValidation Starting test: CheckSDRefDom ......................... icmcpk passed test CheckSDRefDom Running enterprise tests on : icmcpk.local Starting test: Intersite ......................... icmcpk.local passed test Intersite Starting test: FsmoCheck ......................... icmcpk.local passed test FsmoCheck ---------------------- File-Server ---------------------- C:\Users\Administrator.ICMCPK>dcdiag Directory Server Diagnosis Performing initial setup: Trying to find home server... Home Server = FILE-SERVER * Identified AD Forest. Done gathering initial info. Doing initial required tests Testing server: Default-First-Site-Name\FILE-SERVER Starting test: Connectivity ......................... FILE-SERVER passed test Connectivity Doing primary tests Testing server: Default-First-Site-Name\FILE-SERVER Starting test: Advertising Warning: DsGetDcName returned information for \\Server.icmcpk.local, when we were trying to reach FILE-SERVER. SERVER IS NOT RESPONDING or IS NOT CONSIDERED SUITABLE. ......................... FILE-SERVER failed test Advertising Starting test: FrsEvent ......................... FILE-SERVER passed test FrsEvent Starting test: DFSREvent ......................... FILE-SERVER passed test DFSREvent Starting test: SysVolCheck ......................... FILE-SERVER passed test SysVolCheck Starting test: KccEvent ......................... FILE-SERVER passed test KccEvent Starting test: KnowsOfRoleHolders ......................... FILE-SERVER passed test KnowsOfRoleHolders Starting test: MachineAccount ......................... FILE-SERVER passed test MachineAccount Starting test: NCSecDesc Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have Replicating Directory Changes In Filtered Set access rights for the naming context: DC=ForestDnsZones,DC=icmcpk,DC=local Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have Replicating Directory Changes In Filtered Set access rights for the naming context: DC=DomainDnsZones,DC=icmcpk,DC=local ......................... FILE-SERVER failed test NCSecDesc Starting test: NetLogons Unable to connect to the NETLOGON share! (\\FILE-SERVER\netlogon) [FILE-SERVER] An net use or LsaPolicy operation failed with error 67, The network name cannot be found.. ......................... FILE-SERVER failed test NetLogons Starting test: ObjectsReplicated ......................... FILE-SERVER passed test ObjectsReplicated Starting test: Replications ......................... FILE-SERVER passed test Replications Starting test: RidManager ......................... FILE-SERVER passed test RidManager Starting test: Services ......................... FILE-SERVER passed test Services Starting test: SystemLog An Error Event occurred. EventID: 0x00000469 Time Generated: 05/04/2012 14:01:10 Event String: The processing of Group Policy failed because of lack of network con nectivity to a domain controller. This may be a transient condition. A success m essage would be generated once the machine gets connected to the domain controll er and Group Policy has succesfully processed. If you do not see a success messa ge for several hours, then contact your administrator. An Warning Event occurred. EventID: 0x8000A001 Time Generated: 05/04/2012 14:07:11 Event String: The Security System could not establish a secured connection with th e server ldap/icmcpk.local/[email protected]. No authentication protocol was available. An Warning Event occurred. EventID: 0x00000BBC Time Generated: 05/04/2012 14:30:34 Event String: Windows Defender Real-Time Protection agent has detected changes. Mi crosoft recommends you analyze the software that made these changes for potentia l risks. You can use information about how these programs operate to choose whet her to allow them to run or remove them from your computer. Allow changes only if you trust the program or the software publisher. Windows Defender can't undo changes that you allow. An Warning Event occurred. EventID: 0x00000BBC Time Generated: 05/04/2012 14:30:36 Event String: Windows Defender Real-Time Protection agent has detected changes. Mi crosoft recommends you analyze the software that made these changes for potentia l risks. You can use information about how these programs operate to choose whet her to allow them to run or remove them from your computer. Allow changes only if you trust the program or the software publisher. Windows Defender can't undo changes that you allow. ......................... FILE-SERVER failed test SystemLog Starting test: VerifyReferences ......................... FILE-SERVER passed test VerifyReferences Running partition tests on : ForestDnsZones Starting test: CheckSDRefDom ......................... ForestDnsZones passed test CheckSDRefDom Starting test: CrossRefValidation ......................... ForestDnsZones passed test CrossRefValidation Running partition tests on : DomainDnsZones Starting test: CheckSDRefDom ......................... DomainDnsZones passed test CheckSDRefDom Starting test: CrossRefValidation ......................... DomainDnsZones passed test CrossRefValidation Running partition tests on : Schema Starting test: CheckSDRefDom ......................... Schema passed test CheckSDRefDom Starting test: CrossRefValidation ......................... Schema passed test CrossRefValidation Running partition tests on : Configuration Starting test: CheckSDRefDom ......................... Configuration passed test CheckSDRefDom Starting test: CrossRefValidation ......................... Configuration passed test CrossRefValidation Running partition tests on : icmcpk Starting test: CheckSDRefDom ......................... icmcpk passed test CheckSDRefDom Starting test: CrossRefValidation ......................... icmcpk passed test CrossRefValidation Running enterprise tests on : icmcpk.local Starting test: LocatorCheck ......................... icmcpk.local passed test LocatorCheck Starting test: Intersite ......................... icmcpk.local passed test Intersite --------------------- WDS-Server --------------------- C:\Users\Administrator.ICMCPK>dcdiag Directory Server Diagnosis Performing initial setup: Trying to find home server... Home Server = WDS-SERVER * Identified AD Forest. Done gathering initial info. Doing initial required tests Testing server: Default-First-Site-Name\WDS-SERVER Starting test: Connectivity ......................... WDS-SERVER passed test Connectivity Doing primary tests Testing server: Default-First-Site-Name\WDS-SERVER Starting test: Advertising Warning: DsGetDcName returned information for \\Server.icmcpk.local, when we were trying to reach WDS-SERVER. SERVER IS NOT RESPONDING or IS NOT CONSIDERED SUITABLE. ......................... WDS-SERVER failed test Advertising Starting test: FrsEvent There are warning or error events within the last 24 hours after the SYSVOL has been shared. Failing SYSVOL replication problems may cause Group Policy problems. ......................... WDS-SERVER passed test FrsEvent Starting test: DFSREvent ......................... WDS-SERVER passed test DFSREvent Starting test: SysVolCheck ......................... WDS-SERVER passed test SysVolCheck Starting test: KccEvent ......................... WDS-SERVER passed test KccEvent Starting test: KnowsOfRoleHolders ......................... WDS-SERVER passed test KnowsOfRoleHolders Starting test: MachineAccount ......................... WDS-SERVER passed test MachineAccount Starting test: NCSecDesc Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have Replicating Directory Changes In Filtered Set access rights for the naming context: DC=ForestDnsZones,DC=icmcpk,DC=local Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have Replicating Directory Changes In Filtered Set access rights for the naming context: DC=DomainDnsZones,DC=icmcpk,DC=local ......................... WDS-SERVER failed test NCSecDesc Starting test: NetLogons Unable to connect to the NETLOGON share! (\\WDS-SERVER\netlogon) [WDS-SERVER] An net use or LsaPolicy operation failed with error 67, The network name cannot be found.. ......................... WDS-SERVER failed test NetLogons Starting test: ObjectsReplicated ......................... WDS-SERVER passed test ObjectsReplicated Starting test: Replications ......................... WDS-SERVER passed test Replications Starting test: RidManager ......................... WDS-SERVER passed test RidManager Starting test: Services ......................... WDS-SERVER passed test Services Starting test: SystemLog An Error Event occurred. EventID: 0x0000041E Time Generated: 05/04/2012 14:02:55 Event String: The processing of Group Policy failed. Windows could not obtain the name of a domain controller. This could be caused by a name resolution failure. Verify your Domain Name Sysytem (DNS) is configured and working correctly. An Error Event occurred. EventID: 0x0000041E Time Generated: 05/04/2012 14:08:33 Event String: The processing of Group Policy failed. Windows could not obtain the name of a domain controller. This could be caused by a name resolution failure. Verify your Domain Name Sysytem (DNS) is configured and working correctly. ......................... WDS-SERVER failed test SystemLog Starting test: VerifyReferences ......................... WDS-SERVER passed test VerifyReferences Running partition tests on : ForestDnsZones Starting test: CheckSDRefDom ......................... ForestDnsZones passed test CheckSDRefDom Starting test: CrossRefValidation ......................... ForestDnsZones passed test CrossRefValidation Running partition tests on : DomainDnsZones Starting test: CheckSDRefDom ......................... DomainDnsZones passed test CheckSDRefDom Starting test: CrossRefValidation ......................... DomainDnsZones passed test CrossRefValidation Running partition tests on : Schema Starting test: CheckSDRefDom ......................... Schema passed test CheckSDRefDom Starting test: CrossRefValidation ......................... Schema passed test CrossRefValidation Running partition tests on : Configuration Starting test: CheckSDRefDom ......................... Configuration passed test CheckSDRefDom Starting test: CrossRefValidation ......................... Configuration passed test CrossRefValidation Running partition tests on : icmcpk Starting test: CheckSDRefDom ......................... icmcpk passed test CheckSDRefDom Starting test: CrossRefValidation ......................... icmcpk passed test CrossRefValidation Running enterprise tests on : icmcpk.local Starting test: LocatorCheck ......................... icmcpk.local passed test LocatorCheck Starting test: Intersite ......................... icmcpk.local passed test Intersite

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• Injecting jms resource in servlet & best practice for MDB

  - by kislo_metal

  using ejb 3.1, servlet 3.0 (glassfish server v3) Scenario: I have MDB that listen to jms messages and give processing to some other session bean (Stateless). Servelet injecting jms resource. Question 1: Why servlet can`t inject jms resources when they use static declaration ? @Resource(mappedName = "jms/Tarturus") private static ConnectionFactory connectionFactory; @Resource(mappedName = "jms/StyxMDB") private static Queue queue; private Connection connection; and @PostConstruct public void postConstruct() { try { connection = connectionFactory.createConnection(); } catch (JMSException e) { e.printStackTrace(); } } @PreDestroy public void preDestroy() { try { connection.close(); } catch (JMSException e) { e.printStackTrace(); } } The error that I get is : [#|2010-05-03T15:18:17.118+0300|WARNING|glassfish3.0|javax.enterprise.system.container.web.com.sun.enterprise.web|_ThreadID=35;_ThreadName=Thread-1;|StandardWrapperValve[WorkerServlet]: PWC1382: Allocate exception for servlet WorkerServlet com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class ua.co.rufous.server.services.WorkerServiceImpl at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:312) at com.sun.enterprise.web.WebContainer.createServletInstance(WebContainer.java:709) at com.sun.enterprise.web.WebModule.createServletInstance(WebModule.java:1937) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1252) Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Unresolved Message-Destination-Ref ua.co.rufous.server.services.WorkerServiceImpl/[email protected]@null into class ua.co.rufous.server.services.WorkerServiceImpl at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:614) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:384) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:141) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:127) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:306) ... 27 more Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Illegal use of static field private static javax.jms.Queue ua.co.rufous.server.services.WorkerServiceImpl.queue on class that only supports instance-based injection at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:532) ... 31 more |#] my MDB : /** * asadmin commands * asadmin create-jms-resource --restype javax.jms.ConnectionFactory jms/Tarturus * asadmin create-jms-resource --restype javax.jms.Queue jms/StyxMDB * asadmin list-jms-resources */ @MessageDriven(mappedName = "jms/StyxMDB", activationConfig = { @ActivationConfigProperty(propertyName = "connectionFactoryJndiName", propertyValue = "jms/Tarturus"), @ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge"), @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue") }) public class StyxMDB implements MessageListener { @EJB private ActivationProcessingLocal aProcessing; public StyxMDB() { } public void onMessage(Message message) { try { TextMessage msg = (TextMessage) message; String hash = msg.getText(); GluttonyLogger.getInstance().writeInfoLog("geted jms message hash = " + hash); } catch (JMSException e) { } } } everything work good without static declaration: @Resource(mappedName = "jms/Tarturus") private ConnectionFactory connectionFactory; @Resource(mappedName = "jms/StyxMDB") private Queue queue; private Connection connection; Question 2: what is the best practice for working with MDB : processing full request in onMessage() or calling another bean(Stateless bean in my case) in onMessage() method that would process it. Processing including few calls to soap services, so the full processing time could be for a 3 seconds. Thank you.

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• Best Practice for Images with Codeigniter : Generating Thumbs or Resizing on the Fly

  - by Steve K

  Hi all, I know there’s been a good deal written on thumbnail generation and the like with CI, but I wanted to explain what I’ve made and see what kind of best-practice advice I could find. Here’s my story… Currently, I have a site which allows users to upload collections of photos to projects they’ve created after first creating an account. Upon account creation, the site generates folders for the users in the following fashion for each of five pre-defined projects: /students/username/project_num/images/thumbs/ (This is to say that within a pre-created students folder, the username, project_num, images and thumbs folders are created recursively five times.) When a user uploads images to a project, I have a gallery controller which uploads the full images into the images folder for the project_num, and then creates a smaller thumbnail which maintains its ratio. So far so good. On the index page of the site, where these thumbnails and full images are displayed, I had a bit of a brain lapse, thinking I could simply output the full image while resizing it via css for a ‘medium-size’ image which would lead to the full-size image when clicked. (To be clear, the path is: Click on thumbnail— Load scaled full-size (medium-size) image via ajax into a display area above thumbs— Click on medium-sized image— Load full size image via lightbox, or something of that nature.) I have everything working to this point, except, as one might imagine, resizing the full-sized images with css doesn’t maintain aspect ratio for the thumbs, which means I need to find the best way to resize these. In thinking about it, I figured I had two options: I could resize the image on the fly when the user clicks a thumbnail to load the medium-sized image via ajax. (I have a method ‘get_image($url)’ in my gallery controller which simply loads a view with an image tag and the image source passed to it, etc.) I thought perhaps I could send it first to my gallery model, resize it there on the fly, and send it on to the view. The problem I’m having is that resizing it on the fly and echoing it out gives me the raw image data (I apologize, I don’t know that’s the right term). I’ve tried using data_uris to format the raw data into something echoable, but with no success. Is this method possible? The second option I considered was to generate a second medium-sized thumbnail when the user uploads the image with maintain_ratio set to true. This method is slightly less ideal, given that when providing a way for the user to delete their projects, I’ll need to scan for an additional set of images to delete. Not a huge deal, definitely, but something I figured could be avoided by generating the medium-sized image on the fly. I hope I’ve been clear in my explanations, if long-winded! I’m very curious to see what suggestions folks have about the best way to handle this. Much thanks for reading, and any suggestions are much-appreciated! Steve K.

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• How to Practice Unix Programming in C?

  - by danben

  After five years of professional Java (and to a lesser extent, Python) programming and slowly feeling my CS education slip away, I decided I wanted to broaden my horizons / general usefulness to the world and do something that feels more (to me) like I really have an influence over the machine. I chose to learn C and Unix programming since I feel like that is where many of the most interesting problems are. My end goal is to be able to do this professionally, if for no other reason than the fact that I have to spend 40-50 hours per week on work that pays the bills, so it may as well also be the type of coding I want to get better at. Of course, you don't get hired to do things you haven't dont before, so for now I am ramping up on my own. To this end, I started with K&R, which was a great resource in part due to the exercises spread throughout each chapter. After that I moved on to Computer Systems: A Programmer's Perspective, followed by ten chapters of Advanced Programming in the Unix Environment. When I am done with this book, I will read Unix Network Programming. What I'm missing in the Stevens books is the lack of programming problems; they mainly document functionality and provide examples, with a few end-of-chapter questions following. I feel that I would benefit much more from being challenged to use the knowledge in each chapter ala K&R. I could write some test program for each function, but this is a less desirable method as (1) I would probably be less motivated than if I were rising to some external challenge, and (2) I will naturally only think to use the function in the ways that have already occurred to me. So, I'd like to get some recommendations on how to practice. Obviously, my first choice would be to find some resource that has Unix programming challenges. I have also considered finding and attempting to contribute to some open source C project, but this is a bit daunting as there would be some overhead in learning to use the software, then learning the codebase. The only open-source C project I can think of that I use regularly is Python, and I'm not sure how easy that would be to get started on. That said, I'm open to all kinds of suggestions as there are likely things I haven't even thought of.

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• C# HttpWebResponse Error 502 Bad Gateway

  - by Sten Koning

  So i'm using this class to POST on a webpage. The server i'm trying to POST to gives me a 502 Bad Gateway error. I think it has something to do with the user agent. I've already added my firefox user agent to the request but it seems to lose it on the response. I've tried using google and found some other articles on this like this one: Error 502 (Bad Gateway) when sending a request with HttpWebRequest over SSL but I don't know how to fix it since im not that good at c#. Greetings, Sten.

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• "Bad binary signature" in ASP.NET MVC application

  - by David M

  We are getting the error above on some pages of an ASP.NET MVC application when it is deployed to a 64 bit Windows 2008 server box. It works fine on our development machines, though these are 32 bit XP. Just wondered if anyone had encountered this before, and has any suggestions? Details as follows: Bad binary signature. (Exception from HRESULT: 0x80131192) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Runtime.InteropServices.COMException: Bad binary signature. (Exception from HRESULT: 0x80131192) All projects are set to compile for Any CPU, and are compiled in Release mode. The ASP.NET site is precompiled, and the precompiled build is on a 64 bit Windows 2008 TeamCity build agent. Thanks in advance. EDIT We're still plagued by this. I have looked at all the binaries in the website's bin directory using corflags.exe. None has the 32BIT flag set, and all have a CorFlags value of 9 except for Antlr3.Runtime.dll which has a value of 1. The problem only affects certain pages, and it seems to be those which use FluentValidation (including FluentValidation.Mvc and FluentValidation.xValIntegration assemblies). None of these shows anything out of the ordinary when inspected with corflags.exe, and there are no odd looking dependencies revealed by ildasm. When built locally (32 bit Windows XP) the site deploys and runs fine. When built on the build agents (64 bit Windows 2008 Server) the site displays these errors. The site runs in Integrated Pipeline mode, and is not set to 32 bit. The stack trace is: [COMException (0x80131192): Bad binary signature. (Exception from HRESULT: 0x80131192)] ASP.views_user_newinternal_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in e:\TeamCity\buildAgent\work\605ee6b4a5d1dd36\...Admin.Mvc\Views\User\NewInternal.aspx:53 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +115 ASP.views_shared_site_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in e:\TeamCity\buildAgent\work\605ee6b4a5d1dd36\...Admin.Mvc\Views\Shared\Site.Master:26 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +115 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Page.Render(HtmlTextWriter writer) +38 System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +94 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4240

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• Error: Bad Base64Coder input character

  - by sebby_zml

  Hi, I am currently facing an error called "Bad Base64Coder input character at ..." Here is my code in java. String nonce2 = strNONCE; byte[] nonceBytes1 = Base64Coder.decode(nonce2); System.out.println("nonceByte1 value : " + nonceBytes1); The problem now is i get Bad Base64Coder input character error and the nonceBytes1 value is printed as null. I am trying to decode the nonce2 from Base64Coder. My strNONCE value is 16 byte[] nonce = new byte[16]; Random rand; rand = SecureRandom.getInstance ("SHA1PRNG"); rand.nextBytes(nonce); //convert byte array to string. strNONCE = new String(nonce); any help is deeply appreciated

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• How do I guarantee cleanup code runs in Windows C++ (SIGINT, bad alloc, and closed window)

  - by Meekohi

  I have a Windows C++ console program, and if I don't call ReleaseDriver() at the end of my program, some pieces of hardware enter a bad state and can't be used again without rebooting. I'd like to make sure ReleaseDriver() gets runs even if the program exits abnormally, for example if I hit Ctrl+C or close the console window. I can use signal() to create a signal handler for SIGINT. This works fine, although as the program ends it pops up an annoying error "An unhandled Win32 exception occurred...". I don't know how to handle the case of the console window being closed, and (more importantly) I don't know how to handle exceptions caused by bad memory accesses etc. Thanks for any help!

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• Why does Maven have such a bad rep?

  - by Dan

  There is a lot of talk on the internet about how Maven is bad. I have been using some features of Maven for a few years now and the most important benefit in my view is the dependency management. Maven documentation is less than adequate, but generally when I need to accomplish something I figure it once and than it works (for example, I remember when I implemented signing the jars.) I don’t think that Maven is great, but it does solve some problems that without it would be a genuine pain. So, why does Maven has such a bad rep and what problems with Maven can I expect in the future? Maybe there are much better alternatives that I don't know about? (For example, I never looked Ivy in detail.) NOTE: This is not an attempt to cause an argument. It is an attempt to clear the FUD.

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• When are database triggers bad?

  - by CodeToGlory

  There is lot of negative information on database triggers, just want to get the community's take on when is it good vs bad.

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• Getting Bad file descriptor when running Tornado AsyncHTTPTestCase

  - by Will

  When running a test using the Tornado AsyncHTTPTestCase I'm getting a stack trace that isn't related to the test. The test is passing so this is probably happening on the test clean up? I'm using Python 2.7.2, Tornado 2.2. The test code is: class AllServersHandlerTest(AsyncHTTPTestCase): endpoint = AllServersHandler.endpoint # '/rest/test/' def test_server_status_with_advertiser(self): on_new_host(None, '127.0.0.1') response = self.fetch(self.endpoint, method='GET') result = json.loads(response.body, 'utf8').get('data') self.assertEquals(['127.0.0.1'], result) The test passes ok, but I get the following stack trace from the Tornado server. OSError: [Errno 9] Bad file descriptor INFO:root:200 POST /rest/serverStatuses (127.0.0.1) 0.00ms DEBUG:root:error closing fd 688 Traceback (most recent call last): File "C:\Python27\Lib\site-packages\tornado-2.2-py2.7.egg\tornado\ioloop.py", line 173, in close os.close(fd) OSError: [Errno 9] Bad file descriptor Any ideas how to cleanly shutdown the test case?

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• How to prevent bad formatted data input in DataGridViewCell

  - by JuanNunez

  I have an automatically binded DataGridView that obtains data and update data directly from a Strongly Typed Dataset and its TableAdapter. the DataGridView allows data editing but I'm having issues dealing with bad formatted data input. For example, one of the columns is a date, formatted in the database as datetime, 11/05/2010. You can edit the date and the DataGridView opens a TextBox in wich you can enter letters, simbols and other unauthorised characters. When you finish editing the cell if has such bad data it throws a System.FormatException How can I prevent some data to be entered? Is there a way to "filter" that data before it is sent back to the DataGridView?

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• MyEntity.findAllByNameNotLike('bad%')

  - by Richard Paul

  I'm attempting to pull up all entities that have a name that doesn't partially match a given string. MyEntity.findAllByNameNotLike('bad%') This gives me the following error: No such property: nameNot for class: MyEntity Possible solutions: name" type="groovy.lang.MissingPropertyException" I had a quick look at the criteria style but I can't seem to get that going either, def results = MyEntity.withCritieria { not(like('name', 'bad%')) } No signature of method: MyEntity.withCritieria() is applicable for argument types: (MyService$_doSomething_closure1) Ideally I would like to be able to apply this restriction at the finder level as the database contains a large number of entities that I don't want to load up and then exclude for performance reasons. [grails 1.3.1]

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• Nginx+Passenger: 502 Bad Gateway from Nginx when passing urlencoded URLs in GET vars

  - by jimeh

  Here's an example of the URLs that don't work: http://domain/do?url=http%3A%2F%2Fwww.linkedin.com%2Fin%2Fperson http://domain/do?url=http%3A%2F%2Fwww.linkedin.com%2F However, the following URL does work: http://domain/do?url=http%3A%2F%2Fwww.linkedin.com Also, this only happens with Nginx, using Passenger with Apache it works fine, but we use Nginx on our production machines. Here's the entry in Nginx's error log: 2009/12/01 09:30:51 [error] 6407#0: *136 upstream prematurely closed connection while reading response header from upstream, client: xxx.xxx.xxx.xxx, server: domain, request: "GET /do?url=http%3A%2F%2Fwww.linkedin.com%2F HTTP/1.1", upstream: "passenger://unix:/tmp/passenger.6335/master/helper_server.sock:", host: "domain"

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• Getting 400 Bad Request when requesting by server name on nginx/uwsgi

  - by Marc Hughes

  I'm trying to run 2 different sites on nginx via different ports (they each have a load balancer that points to the appropriate port). The first site work perfectly. The second site... If I access http://localhost:81/ it works correctly If I access http://127.0.01:81/ it works correctly If I access the hostname http://THEHOSTNAME:81/ it fails with a 400 error If I access the public IP http://x.x.x.x:81/ it fails with a 400 error I've set the error_log to info, but the only lines I get in the log when this happens is: ==> /var/log/nginx/access.log <== 10.183.38.141 - - [24/Aug/2014:21:03:28 +0000] "GET / HTTP/1.1" 400 37 "-" "curl/7.36.0" "-" ==> /var/log/nginx/error.log <== 2014/08/24 21:03:28 [info] 7029#0: *5 client 10.183.38.141 closed keepalive connection In my uwsgi log, I only see this: [pid: 6870|app: 0|req: 87/92] 10.28.23.224 () {32 vars in 380 bytes} [Sun Aug 24 21:05:21 2014] GET / => generated 26 bytes in 1 msecs (HTTP/1.1 400) 2 headers in 82 bytes (1 switches on core 2) What should be my next step in debugging this?

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