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  • ADO.NET Data Services Entity Framework request error when property setter is internal

    - by Jim Straatman
    I receive an error message when exposing an ADO.NET Data Service using an Entity Framework data model that contains an entity (called "Case") with an internal setter on a property. If I modify the setter to be public (using the entity designer), the data services works fine. I don’t need the entity "Case" exposed in the data service, so I tried to limit which entities are exposed using SetEntitySetAccessRule. This didn’t work, and service end point fails with the same error. public static void InitializeService(IDataServiceConfiguration config) { config.SetEntitySetAccessRule("User", EntitySetRights.AllRead); } The error message is reported in a browser when the .svc endpoint is called. It is very generic, and reads “Request Error. The server encountered an error processing the request. See server logs for more details.” Unfortunately, there are no entries in the System and Application event logs. I found this stackoverflow question that shows how to configure tracing on the service. After doing so, the following NullReferenceExceptoin error was reported in the trace log. Does anyone know how to avoid this exception when including an entity with an internal setter? Blockquote 131076 3 0 2 MOTOJIM http://msdn.microsoft.com/en-US/library/System.ServiceModel.Diagnostics.TraceHandledException.aspx Handling an exception. 685a2910-19-128703978432492675 System.NullReferenceException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Object reference not set to an instance of an object. at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMemberMetadata(ResourceType resourceType, MetadataWorkspace workspace, IDictionary2 entitySets, IDictionary2 knownTypes) at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMetadata(IDictionary2 knownTypes, IDictionary2 entitySets) at System.Data.Services.Providers.BaseServiceProvider.PopulateMetadata() at System.Data.Services.DataService1.CreateProvider(Type dataServiceType, Object dataSourceInstance, DataServiceConfiguration&amp; configuration) at System.Data.Services.DataService1.EnsureProviderAndConfigForRequest() at System.Data.Services.DataService1.ProcessRequestForMessage(Stream messageBody) at SyncInvokeProcessRequestForMessage(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]&amp; outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc&amp; rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet) </StackTrace> <ExceptionString>System.NullReferenceException: Object reference not set to an instance of an object. at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMemberMetadata(ResourceType resourceType, MetadataWorkspace workspace, IDictionary2 entitySets, IDictionary2 knownTypes) at System.Data.Services.Providers.ObjectContextServiceProvider.PopulateMetadata(IDictionary2 knownTypes, IDictionary2 entitySets) at System.Data.Services.Providers.BaseServiceProvider.P

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  • Please give the solution of the following programs in R Programming

    - by NEETHU
    Table below gives data concerning the performance of 28 national football league teams in 1976.It is suspected that the no. of yards gained rushing by opponents(x8) has an effect on the no. of games won by a team(y) (a)Fit a simple linear regression model relating games won by y to yards gained rushing by opponents x8. (b)Construct the analysis of variance table and test for significance of regression. (c)Find a 95% CI on the slope. (d)What percent of the total variability in y is explained by this model. (e)Find a 95% CI on the mean number of games won in opponents yards rushing is limited to 2000 yards. Team y x8 1 10 2205 2 11 2096 3 11 1847 4 13 1803 5 10 1457 6 11 1848 7 10 1564 8 11 1821 9 4 2577 10 2 2476 11 7 1984 12 10 1917 13 9 1761 14 9 1709 15 6 1901 16 5 2288 17 5 2072 18 5 2861 19 6 2411 20 4 2289 21 3 2203 22 3 2592 23 4 2053 24 10 1979 25 6 2048 26 8 1786 27 2 2876 28 0 2560 Suppose we would like to use the model developed in problem 1 to predict the no. of games a team will win if it can limit opponents yards rushing to 1800 yards. Find a point estimate of the no. of games won when x8=1800.Find a 905 prediction interval on the no. of games won. The purity of Oxygen produced by a fractionation process is thought to be percentage of Hydrocarbon in the main condenser of the processing unit .20 samples are shown below. Purity(%) Hydrocarbon(%) 86.91 1.02 89.85 1.11 90.28 1.43 86.34 1.11 92.58 1.01 87.33 0.95 86.29 1.11 91.86 0.87 95.61 1.43 89.86 1.02 96.73 1.46 99.42 1.55 98.66 1.55 96.07 1.55 93.65 1.4 87.31 1.15 95 1.01 96.85 0.99 85.2 0.95 90.56 0.98 (a)Fit a simple linear regression model to the data. (b)Test the hypothesis H0:ß=0 (c)Calculate R2 . (d)Find a 95% CI on the slope. (e)Find a 95% CI on the mean purity and the Hydrocarbon % is 1. Consider the Oxygen plant data in Problem3 and assume that purity and Hydrocarbon percentage are jointly normally distributed r.vs (a)What is the correlation between Oxygen purity and Hydrocarbon% (b)Test the hypothesis that ?=0. (c)Construct a 95% CI for ?.

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  • In Email, Image (img) Source (src) Tags are rewritten as relative links. How to fix?

    - by Noah Goodrich
    I'm working on sending out an html based email, and every time it sends the image src tags and some of the anchor href tags are modified to be relative url's. Update 2: This is happening between when the body of the email is generated and sent and when it arrives in my inbox. Update: I am using Postfix on a LAMPP server. In addition, I am using Zend_Mail to send the emails out. For example, I have a link: src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/header.jpg" And it gets rewritten as: src="../../../../images/email/highpoint_2009_04/header.jpg" What can cause this to occur and how is it corrected? Email headers: Return-Path: <[email protected]> X-Original-To: [email protected] Delivered-To: [email protected] Received: by mail.example.com (Postfix, from userid 0) id 6BF012252; Tue, 14 Apr 2009 12:15:20 -0600 (MDT) To: Gabriel <[email protected]> Subject: Free Map to Sales Success From: Somebody <[email protected]> Date: Tue, 14 Apr 2009 12:15:20 -0600 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: multipart/related Content-Disposition: inline Message-Id: <[email protected]> Original content to be sent out: <table align="center" border="0" cellpadding="0" cellspacing="0" width="600"> <tbody> <tr> <td valign="top"> <a href="http://www.furnituretrainingcompany.com"> <img moz-do-not-send="true" alt="The Furniture Training Company - Know More. Sell More." src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/header.jpg" border="0" height="123" width="600"> </a> </td> </tr> </tbody> </table> <table align="center" border="0" cellpadding="0" cellspacing="0" width="600"> <tbody> <tr> <td valign="top"><img alt="Visit us at High Point to receive your free training poster" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/hero.jpg" moz-do-not-send="true" height="150" width="600"><br> </td> </tr> </tbody> </table> <table align="center" border="0" cellpadding="0" cellspacing="0" width="600"> <tbody> <tr> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer_content_left.jpg" moz-do-not-send="true" height="30" width="30"><br> </td> <td bgcolor="#ffffff" valign="top"><font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" color="#000000" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><big><small><big><b>See you at Market</b></big><br> </small></big></big></big></big></font> <font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" color="#000000" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><big><small><br> </small></big></big></big></big></font><small><font face="Helvetica, Arial, sans-serif">Visit our space to get your free Map to Sales Success poster! This unique 24 X 36 color poster is your guide to developing high volume salespeople with larger tickets. Find us in the new NHFA Retailer Resource Center located in the Plaza. <br> <br> Don&#8217;t miss Mark Lacy&#8217;s entertaining seminar "Help Wanted! My Sales Associates Can&#8217;t Sell Water to a Thirsty Camel." He&#8217;ll reveal powerful secrets for turning sales associates into furniture experts that will sell. See him Saturday, April 25th at 11:30 AM in the seminar room of the new NHFA Retail Resource Center in the Plaza. <br> <br> Stop by our space to learn how our ingenious internet-delivered training courses are easy to use, guaranteed to work, and cheaper than the daily donuts. Over 95% report increased sales. <br> <br> Plan to see us at High Point. </font></small> <font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" color="#000000" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><big><small><small><br> <br> <br> <br> </small></small></big></big></big></big></font><small><font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" color="#000000" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><small> </small></big></big></big></font></small> <a href="http://www.furnituretrainingcompany.com/map"><img alt="Find out more" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/image_content_left.jpg" moz-do-not-send="true" border="0" height="67" width="326"></a><br> <br> </td> <td bgcolor="#ffffff" valign="top"> <img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer_content_middle.jpg" moz-do-not-send="true" height="28" width="28"><br> </td> <td bgcolor="#ffffff" valign="top"><img alt="Roadmap to Sales Success poster" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/image_content_right.jpg" moz-do-not-send="true" height="267" width="186"><br> <font face="Helvetica, Arial, sans-serif"><small><font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" color="#000000" size="1"><big><big><big><small><b>Road Map to Sales Success<br> </b><br> </small></big></big></big></font>This beautiful poster is yours free for simply stopping by and visiting with us at High Point. <span class="moz-txt-slash">Our space is located inside the </span>new NHFA Retailer Resource Center in the Plaza Suites, 222 South Main St, 1st Floor. We will be at market from Sat April 25th until Thur April 30th. </small></font><br> </td> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer_content_right.jpg" moz-do-not-send="true" height="30" width="30"><br> <br> </td> </tr> </tbody> </table> <table align="center" border="0" cellpadding="0" cellspacing="0" width="600"> <tbody> <tr> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/disclaimer_divider.jpg" moz-do-not-send="true" height="25" width="600"><br> </td> </tr> </tbody> </table> <table align="center" border="0" cellpadding="0" cellspacing="0" width="600"> <tbody> <tr> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer_disclaimer_left.jpg" moz-do-not-send="true"></td> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer_disclaimer_middle.jpg" moz-do-not-send="true"><br> <font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" color="#666666" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><big><small><small><small>If you are not attending the High Point market in April but would still like to receive a free Road Map to Sales Success poster visit us on the web at <u><a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="http://www.furnituretrainingcompany.com">www.furnituretrainingcompany.com</a></u>, or to speak with a Furniture Training Company representative, call toll free (866) 755-5996. We do not offer free shipping outside of the U.S. and Canada. Retailers outside of the U.S. and Canada may call for more information. Limit one free Road Map to Sales Success per company. Other copies of the poster may be purchased on our web site.<br> <br> </small></small></small></big></big></big></big></font> <font color="#666666"><small><font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><small><small>We hope you found this message to be useful. However, if you'd rather not receive future emails of this sort from The Furniture Training Company, please <a moz-do-not-send="true" href="http://www.furnituretraining.com/contact">click here to unsubscribe</a>.<br> <br> </small></small></big></big></big></font></small><small><font originaltag="yes" style="font-size: 9px; font-family: Verdana,Arial,Helvetica,sans-serif;" face="Verdana, Arial, Helvetica, sans-serif" size="1"><big><big><big><small><small>&copy;Copyright 2009 The Furniture Training Company.<br> 1770 North Research Park Way, <br> North Logan, UT 84341. <br> All Rights Reserved.</small></small></big></big></big></font></small></font><br> </td> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer_disclaimer_right.jpg" moz-do-not-send="true"></td> </tr> </tbody> </table> <table align="center" border="0" cellpadding="0" cellspacing="0" width="600"> <tbody> <tr> <td bgcolor="#ffffff" valign="top"><img alt="" src="http://www.furnituretrainingcompany.com/images/email/highpoint_2009_04/footer.jpg" moz-do-not-send="true"> </td> </tr> </tbody> </table> <br> <br> Content that gets sent: <table border=3D"0" cellspacing=3D"0" cellpadding=3D"0" width=3D"600" al= ign=3D"center">=0D=0A<tbody>=0D=0A<tr>=0D=0A<td valign=3D"top"><a href= =3D"http://www.furnituretrainingcompany.com"> <img src=3D"http://www.fur= nituretrainingcompany.com/images/email/highpoint_2009_04/header.jpg" bor= der=3D"0" alt=3D"The Furniture Training Company - Know More. Sell More."= width=3D"600" height=3D"123" /> </a></td>=0D=0A</tr>=0D=0A</tbody>=0D= =0A</table>=0D=0A<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0"= width=3D"600" align=3D"center">=0D=0A<tbody>=0D=0A<tr>=0D=0A<td valign= =3D"top"><img src=3D"http://www.furnituretrainingcompany.com/images/emai= l/highpoint_2009_04/hero.jpg" alt=3D"Visit us at High Point to receive y= our free training poster" width=3D"600" height=3D"150" /><br /></td>=0D= =0A</tr>=0D=0A</tbody>=0D=0A</table>=0D=0A<table border=3D"0" cellspacin= g=3D"0" cellpadding=3D"0" width=3D"600" align=3D"center">=0D=0A<tbody>= =0D=0A<tr>=0D=0A<td valign=3D"top" bgcolor=3D"#ffffff"><img src=3D"http:= //www.furnituretrainingcompany.com/images/email/highpoint_2009_04/spacer= _content_left.jpg" alt=3D"" width=3D"30" height=3D"30" /><br /></td>=0D= =0A<td valign=3D"top" bgcolor=3D"#ffffff"><span style=3D"font-size: xx-s= mall; font-family: Verdana,Arial,Helvetica,sans-serif; color: #000000;">= <big><big><big><big><small><big><strong>See you at Market</strong></big>= <br /> </small></big></big></big></big></span> <span style=3D"font-size:= xx-small; font-family: Verdana,Arial,Helvetica,sans-serif; color: #0000= 00;"><big><big><big><big><small><br /> </small></big></big></big></big><= /span><small><span style=3D"font-family: Helvetica,Arial,sans-serif;">Vi= sit our space to get your free Map to Sales Success poster! This unique= 24 X 36 color poster is your guide to developing high volume salespeopl= e with larger tickets. Find us in the new NHFA Retailer Resource Center= located in the Plaza. <br /> <br /> Don&rsquo;t miss Mark Lacy&rsquo;s= entertaining seminar "Help Wanted! My Sales Associates Can&rsquo;t Sell= Water to a Thirsty Camel." He&rsquo;ll reveal powerful secrets for turn= ing sales associates into furniture experts that will sell. See him Satu= rday, April 25th at 11:30 AM in the seminar room of the new NHFA Retail= Resource Center in the Plaza. <br /> <br /> Stop by our space to learn= how our ingenious internet-delivered training courses are easy to use,= guaranteed to work, and cheaper than the daily donuts. Over 95% report= increased sales. <br /> <br /> Plan to see us at High Point. </span></s= mall> <span style=3D"font-size: xx-small; font-family: Verdana,Arial,Hel= vetica,sans-serif; color: #000000;"><big><big><big><big><small><small><b= r /> <br /> <br /> <br /> </small></small></big></big></big></big></span= ><small><span style=3D"font-size: xx-small; font-family: Verdana,Arial,H= elvetica,sans-serif; color: #000000;"><big><big><big><small> </small></b= ig></big></big></span></small> <a href=3D"http://www.furnituretrainingco= mpany.com/map"><img src=3D"http://www.furnituretrainingcompany.com/image= s/email/highpoint_2009_04/image_content_left.jpg" border=3D"0" alt=3D"Fi= nd out more" width=3D"326" height=3D"67" /></a><br /> <br /></td>=0D=0A<= td valign=3D"top" bgcolor=3D"#ffffff"><img src=3D"http://www.furnituretr= ainingcompany.com/images/email/highpoint_2009_04/spacer_content_middle.j= pg" alt=3D"" width=3D"28" height=3D"28" /><br /></td>=0D=0A<td valign=3D= "top" bgcolor=3D"#ffffff"><img src=3D"http://www.furnituretrainingcompan= y.com/images/email/highpoint_2009_04/image_content_right.jpg" alt=3D"Roa= dmap to Sales Success poster" width=3D"186" height=3D"267" /><br /> <spa= n style=3D"font-family: Helvetica,Arial,sans-serif;"><small><span style= =3D"font-size: xx-small; color: #000000;"><big><big><big><small><strong>= Road Map to Sales Success<br /> </strong><br /> </small></big></big></bi= g></span>This beautiful poster is yours free for simply stopping by and= visiting with us at High Point. <span class=3D"moz-txt-slash">Our space= is located inside the </span>new NHFA Retailer Resource Center in the P= laza Suites, 222 South Main St, 1st Floor. We will be at market from Sat= April 25th until Thur April 30th. </small></span><br /></td>=0D=0A<td v= align=3D"top" bgcolor=3D"#ffffff"><img src=3D"http://www.furnituretraini= ngcompany.com/images/email/highpoint_2009_04/spacer_content_right.jpg" a= lt=3D"" width=3D"30" height=3D"30" /><br /> <br /></td>=0D=0A</tr>=0D=0A= </tbody>=0D=0A</table>=0D=0A<table border=3D"0" cellspacing=3D"0" cellpa= dding=3D"0" width=3D"600" align=3D"center">=0D=0A<tbody>=0D=0A<tr>=0D=0A= <td valign=3D"top" bgcolor=3D"#ffffff"><img src=3D"http://www.furnituret= rainingcompany.com/images/email/highpoint_2009_04/disclaimer_divider.jpg= " alt=3D"" width=3D"600" height=3D"25" /><br /></td>=0D=0A</tr>=0D=0A</t= body>=0D=0A</table>=0D=0A<table border=3D"0" cellspacing=3D"0" cellpaddi= ng=3D"0" width=3D"600" align=3D"center">=0D=0A<tbody>=0D=0A<tr>=0D=0A<td= valign=3D"top" bgcolor=3D"#ffffff"><img src=3D"http://www.furnituretrai= ningcompany.com/images/email/highpoint_2009_04/spacer_disclaimer_left.jp= g" alt=3D"" /></td>=0D=0A<td valign=3D"top" bgcolor=3D"#ffffff"><img src= =3D"http://www.furnituretrainingcompany.com/images/email/highpoint_2009_= 04/spacer_disclaimer_middle.jpg" alt=3D"" /><br /> <span style=3D"font-s= ize: xx-small; font-family: Verdana,Arial,Helvetica,sans-serif; color: #= 666666;"><big><big><big><big><small><small><small>If you are not attendi= ng the High Point market in April but would still like to receive a free= Road Map to Sales Success poster visit us on the web at <span style=3D"= text-decoration: underline;"><a class=3D"moz-txt-link-abbreviated" href= =3D"http://www.furnituretrainingcompany.com">www.furnituretrainingcompan= y.com</a></span>, or to speak with a Furniture Training Company represen= tative, call toll free (866) 755-5996. We do not offer free shipping out= side of the U.S. and Canada. Retailers outside of the U.S. and Canada ma= y call for more information. Limit one free Road Map to Sales Success pe= r company. Other copies of the poster may be purchased on our web site.<= br /> <br /> </small></small></small></big></big></big></big></span> <sp= an style=3D"color: #666666;"><small><span style=3D"font-size: xx-small;= font-family: Verdana,Arial,Helvetica,sans-serif;"><big><big><big><small= ><small>We hope you found this message to be useful. However, if you'd r= ather not receive future emails of this sort from The Furniture Training= Company, please <a href=3D"http://www.furnituretraining.com/contact">cl= ick here to unsubscribe</a>.<br /> <br /> </small></small></big></big></= big></span></small><small><span style=3D"font-size: xx-small; font-famil= y: Verdana,Arial,Helvetica,sans-serif;"><big><big><big><small><small>&co= py;Copyright 2009 The Furniture Training Company.<br /> 1770 North Resea= rch Park Way, <br /> North Logan, UT 84341. <br /> All Rights Reserved.<= /small></small></big></big></big></span></small></span><br /></td>=0D=0A= <td valign=3D"top" bgcolor=3D"#ffffff"><img src=3D"http://www.furnituret= rainingcompany.com/images/email/highpoint_2009_04/spacer_disclaimer_righ= t.jpg" alt=3D"" /></td>=0D=0A</tr>=0D=0A</tbody>=0D=0A</table>=0D=0A<tab= le border=3D"0" cellspacing=3D"0" cellpadding=3D"0" width=3D"600" align= =3D"center">=0D=0A<tbody>=0D=0A<tr>=0D=0A<td valign=3D"top" bgcolor=3D"#= ffffff"><img src=3D"http://www.furnituretrainingcompany.com/images/email= /highpoint_2009_04/footer.jpg" alt=3D"" /></td>=0D=0A</tr>=0D=0A</tbody>= =0D=0A</table>=0D=0A<p><br /></p><br><hr><a href=3D'http://localhost/ftc= /app/unsubscribe.php?action=3DoptOut&pid=3D6121&cid=3D19&email=3Dmarkl@f= urnituretrainingcompany.com'>Click to Unsubscribe</a>

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  • Is That REST API Really RPC? Roy Fielding Seems to Think So.

    - by Rich Apodaca
    A large amount of what I thought I knew about REST is apparently wrong - and I'm not alone. This question has a long lead-in, but it seems to be necessary because the information is a bit scattered. The actual question comes at the end if you're already familiar with this topic. From the first paragraph of Roy Fielding's REST APIs must be hypertext-driven, it's pretty clear he believes his work is being widely misinterpreted: I am getting frustrated by the number of people calling any HTTP-based interface a REST API. Today’s example is the SocialSite REST API. That is RPC. It screams RPC. There is so much coupling on display that it should be given an X rating. Fielding goes on to list several attributes of a REST API. Some of them seem to go against both common practice and common advice on SO and other forums. For example: A REST API should be entered with no prior knowledge beyond the initial URI (bookmark) and set of standardized media types that are appropriate for the intended audience (i.e., expected to be understood by any client that might use the API). ... A REST API must not define fixed resource names or hierarchies (an obvious coupling of client and server). ... A REST API should spend almost all of its descriptive effort in defining the media type(s) used for representing resources and driving application state, or in defining extended relation names and/or hypertext-enabled mark-up for existing standard media types. ... The idea of "hypertext" plays a central role - much more so than URI structure or what HTTP verbs mean. "Hypertext" is defined in one of the comments: When I [Fielding] say hypertext, I mean the simultaneous presentation of information and controls such that the information becomes the affordance through which the user (or automaton) obtains choices and selects actions. Hypermedia is just an expansion on what text means to include temporal anchors within a media stream; most researchers have dropped the distinction. Hypertext does not need to be HTML on a browser. Machines can follow links when they understand the data format and relationship types. I'm guessing at this point, but the first two points above seem to suggest that API documentation for a Foo resource that looks like the following leads to tight coupling between client and server and has no place in a RESTful system. GET /foos/{id} # read a Foo POST /foos/{id} # create a Foo PUT /foos/{id} # update a Foo Instead, an agent should be forced to discover the URIs for all Foos by, for example, issuing a GET request against /foos. (Those URIs may turn out to follow the pattern above, but that's beside the point.) The response uses a media type that is capable of conveying how to access each item and what can be done with it, giving rise to the third point above. For this reason, API documentation should focus on explaining how to interpret the hypertext contained in the response. Furthermore, every time a URI to a Foo resource is requested, the response contains all of the information needed for an agent to discover how to proceed by, for example, accessing associated and parent resources through their URIs, or by taking action after the creation/deletion of a resource. The key to the entire system is that the response consists of hypertext contained in a media type that itself conveys to the agent options for proceeding. It's not unlike the way a browser works for humans. But this is just my best guess at this particular moment. Fielding posted a follow-up in which he responded to criticism that his discussion was too abstract, lacking in examples, and jargon-rich: Others will try to decipher what I have written in ways that are more direct or applicable to some practical concern of today. I probably won’t, because I am too busy grappling with the next topic, preparing for a conference, writing another standard, traveling to some distant place, or just doing the little things that let me feel I have I earned my paycheck. So, two simple questions for the REST experts out there with a practical mindset: how do you interpret what Fielding is saying and how do you put it into practice when documenting/implementing REST APIs? Edit: this question is an example of how hard it can be to learn something if you don't have a name for what you're talking about. The name in this case is "Hypermedia as the Engine of Application State" (HATEOAS).

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  • Running a Java program with a .dll from Adobe AIR's native process

    - by Donny
    I would like to be able to operate a scanner from my AIR application. Since there's no support for this natively, I'm trying to use the NativeProcess class to start a jar file that can run the scanner. The Java code is using the JTwain library to operate the scanner. The Java application runs fine by itself, and the AIR application can start and communicate with the Java application. The problem seems to be that any time I attempt to use a function from JTwain (which relies on the JTwain.dll), the application dies IF AIR STARTED IT. I'm not sure if there's some limit about referencing dll files from the native process or what. I've included my code below Java code- while(true) { try { System.out.println("Start"); text = in.readLine(); Source source = SourceManager.instance().getCurrentSource(); System.out.println("Java says: "+ text); } catch (IOException e) { System.err.println("Exception while reading the input. " + e); } catch (Exception e) { System.out.println("Other exception occured: " + e.toString()); } finally { } } } Air application- import mx.events.FlexEvent; private var nativeProcess:NativeProcess; private var npInfo:NativeProcessStartupInfo; private var processBuffer:ByteArray; private var bLength:int = 0; protected function windowedapplication1_applicationCompleteHandler(event:FlexEvent):void { var arg:Vector.<String> = new Vector.<String>; arg.push("-jar"); arg.push(File.applicationDirectory.resolvePath("Hello2.jar").nativePath); processBuffer = new ByteArray; npInfo = new NativeProcessStartupInfo; npInfo.executable = new File("C:/Program Files/Java/jre6/bin/javaw.exe"); npInfo.arguments = arg; nativeProcess = new NativeProcess; nativeProcess.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, onStandardOutputData); nativeProcess.start(npInfo); } private function onStandardOutputData(e:ProgressEvent):void { tArea.text += nativeProcess.standardOutput.readUTFBytes(nativeProcess.standardOutput.bytesAvailable); } protected function button1_clickHandler(event:MouseEvent):void { tArea.text += 'AIR app: '+tInput.text + '\n'; nativeProcess.standardInput.writeMultiByte(tInput.text + "\n", 'utf-8'); tInput.text = ''; } protected function windowedapplication1_closeHandler(event:Event):void { nativeProcess.closeInput(); } ]]> </fx:Script> <s:Button label="Send" x="221" y="11" click="button1_clickHandler(event)"/> <s:TextInput id="tInput" x="10" y="10" width="203"/> <s:TextArea id="tArea" x="10" width="282" height="88" top="40"/> I would love some explanation about why this is dying. I've done enough testing that I know absolutely that the line that kills it is the SourceManager.instance().getCurrentSource(). I would love any suggestions. Thanks.

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  • Multi-step Workflows: make Workflow A depend on results of Workflow B and/or Workflow C

    - by Joey
    I have been tasked with creating a Software Installation Approval section for our Intranet. When a person requests that a particular piece of software be installed on their workstation, we need to get IT approval and then business approval. Once those are obtained, it is to be installed. I am using Sharepoint Designer to do this. I have List A, where the user enters the information on the requested software. Workflow A then creates a Task in List B, which is then assigned to the IT approver. Workflow B works on List B on item creation, setting the due dates, titles, and other fields, and then pauses until the due date. The IT approver works with the business side and completes the task. Once List B task is complete, the item in List A should be marked as complete -- I have everything up to this point working fine. I want to make this more robust in 2 ways. As the only real option is to mark List B task as "completed", which essentially means "Approved", we have no way of really denying a request. What I want to add is the option to approve or deny a request through the task on List B -- if it is approved, I want the item in List A to continue to show "In Progress" with a custom status of "Approved", and I want to create a new task for software installation; once the installation task is marked as completed, then I want List A to show "Completed" with a status of "Installed". If it is denied, I want the item in List A to show as "Completed", with a status of "Denied". The problem is, I'm not even sure where to start making these modifications. Creating and modifying the custom status fields isn't that big of an issue -- I have messed around with this and I'm fairly confident I can do this easily. My main concern is that I know I will need a Workflow C, but I don't know where or how to trigger this to get the results I need. I've managed to get Workflows A and B working fine, but anything beyond this is really pushing the limit of my knowledge. It's probably obvious that I am rather new to Sharepoint workflows. I was very much thrust into this position and I am still feeling my way around. Thanks in advance for any help!

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  • MS Chart Control Scale - Line graph show 12 months

    - by Mike
    Hi, On my X Axis, I have months. The chart shows up to 11 points, i.e. Jan - Nov of the same year, but when I add 12 points (Jan - Dec), it will do an auto label thing and change the interval for every 4 months. How can I change the graph so that it shows 12 months before it does the auto labels? Here is the server control code I am currently using. <asp:CHART ID="Chart1" runat="server" BorderColor="181, 64, 1" BorderDashStyle="Solid" BorderWidth="2" Height="296px" ImageLocation="~/TempImages/ChartPic_#SEQ(300,3)" ImageType="Png" Palette="None" Width="700px" BorderlineColor=""> <legends> <asp:Legend BackColor="Transparent" Font="Trebuchet MS, 8pt, style=Bold" IsTextAutoFit="False" Name="Default" Alignment="Center" DockedToChartArea="ChartArea1" Docking="Top" IsDockedInsideChartArea="False" Title="Legend"> </asp:Legend> </legends> <series> <asp:Series BorderColor="180, 26, 59, 105" BorderWidth="2" ChartType="Line" Color="220, 65, 140, 240" MarkerSize="6" Name="Series1" ShadowColor="Black" ShadowOffset="2" XValueType="DateTime" YValueType="Double" LabelFormat="c0" LegendText="Actual" MarkerStyle="Circle"> </asp:Series> <asp:Series BorderColor="180, 26, 59, 105" BorderWidth="2" ChartType="Line" Color="220, 224, 64, 10" MarkerSize="6" Name="Series2" ShadowColor="Black" ShadowOffset="2" XValueType="DateTime" YValueType="Double" LabelFormat="c0" LegendText="Projected" MarkerStyle="Circle"> </asp:Series> <asp:Series BorderColor="180, 26, 59, 105" BorderWidth="2" ChartArea="ChartArea1" ChartType="Line" Legend="Default" Name="Series3" LabelFormat="c0" XValueType="DateTime" YValueType="Double" Color="0, 192, 192" MarkerSize="6" ShadowColor="Black" ShadowOffset="2" LegendText="Actual Credit Limit" MarkerStyle="Circle"> </asp:Series> </series> <chartareas> <asp:ChartArea BackColor="#DEEDF7" BackGradientStyle="TopBottom" BackSecondaryColor="White" BorderColor="64, 64, 64, 64" BorderDashStyle="Solid" Name="ChartArea1" ShadowColor="Transparent"> <area3dstyle inclination="40" isclustered="False" isrightangleaxes="False" lightstyle="Realistic" perspective="9" rotation="25" wallwidth="3" /> <axisy linecolor="64, 64, 64, 64" islabelautofit="False" isstartedfromzero="False"> <LabelStyle Font="Trebuchet MS, 8.25pt, style=Bold" Format="c0" /> <majorgrid linecolor="64, 64, 64, 64" /> </axisy> <axisx linecolor="64, 64, 64, 64" intervaloffsettype="Months" intervaltype="Months" islabelautofit="False" isstartedfromzero="False"> <LabelStyle Font="Trebuchet MS, 8.25pt, style=Bold" Angle="-60" Format="MMM yy" /> <majorgrid linecolor="64, 64, 64, 64" /> </axisx> </asp:ChartArea> </chartareas> </asp:CHART> Thanks.

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  • What does a Software Developer actually do?

    - by chobo2
    Hi I am graduating from my Computer Science degree in a few weeks from now!! I started to look for my first job. For the last couple years I gotten really into web programming(Asp.net). My first choice would be to get a junior asp.net MVC developer but I don't any companies in my area use MVC yet or if they do they are not hiring. So my second choice would be a junior asp.net Webforms developer. My other choices after that would be forms applications, mobile applications using .Net and C#. As you can see I am looking for something with .Net. I spent the last couple years doing .Net projects for school, on my free time and love the Language and it would pain me right now to switch to something like php. So now I found a posting in my area for an Entry Software Developer. I like the fact that they are using .net and that it is entry job(I never worked in this industry and never had more then like a tutoring job so I want to for like intermediate jobs). Posting Are you looking for an exciting challenge within a dynamic, people-oriented culture where you can launch your technical career? Company Name Inc. is a technology consulting company, located in Canada, that designs, develops, and delivers real-time interactive applications accessed via the Internet as well as back-end tools to support these applications. Company Name provides a combination of out-of-the-box and customized solutions to an expanding list of partners and customers. POSITION SUMMARY As a member of our team, the successful candidate will be responsible for helping us increase the quality and stability of our software systems by working jointly and directly with both the Software Development teams and the QA Team. The primary mission of this role will be to substantially enhance our test automation suite. The incumbent will design and program automated tests (unit, integration, system, stress and load) in Visual Studio using C# and will develop sound processes that help us identify and resolve defects as early as possible. The successful incumbent will help us improve and enhance system functionality, reliability, performance and scalability. This role is specifically designed for an eager, bright, new graduate who is looking for a stepping stone into a software engineering role. We promote from within and invite new graduates to apply for this important position - which may lead to new opportunities. We also offer a generous professional development plan to help you on your way. You will be a key part of a team of experts that is responsible for improving the quality of our software by: • Designing, writing, and executing test plans and programmatic tests in Visual Studio using C# and NUnit for functional testing of our code, new features, regression, and performance test procedures. • Working with the engineers to design and build the stress and load testing framework which emulates tens and even hundreds of thousands of concurrent users via a distributed network interfacing with our Load Testing Lab. • Interfacing with both the Development Team and the QA Team to ensure risks are identified and managed. • Mentoring and leading the QA Team in programmatic test automation technologies and tools. MUST HAVE SKILLS / QUALIFICATIONS: • Diploma or higher Degree in Computer Science, or equivalent formal training. • Fundamental C# programming skills. • Knowledge of Internet technologies and Microsoft Windows platforms. • Knowledge of PC hardware. • Excellent communication skills (both oral and written). • Self-starter who takes initiative, requires minimal supervision, can handle multiple simultaneous tasks. • Detail-oriented, able to concentrate, and work quickly. • Proven diagnostic, analytical, and problem solving skills. NICE TO HAVE SKILLS: • Exposure to Visual Studio Team System or Visual Studio Test Edition. • Exposure in C# using NUnit. • Exposure to NUnit, HTTPUnit, and other automation tool suites. • Exposure to Performance/Stress/Load Testing. • Good understanding of relational databases (MS SQL Server). • Familiar with video and online multi-player games. As part of our team you will have the opportunity to work with a supportive team of experts, drive your own success, and ride the wave as we continually expand our team of experts. If you are interested in this opportunity, please send your resume to [email protected] with “Entry Level Software Developer” in the subject line. So that is the posting. To me it sounds like it is QA job. I don't have anything against QA jobs but alot of them seems to be your just clicking buttons and running scripts. Is this what a typical software developer does? Like I am so on the fence to apply for this job. On one side I am not sure how much programming I would be doing. Like I want to be at least half the time programming otherwise my skills will never improve since I will never be programming in teams and stuff. At the same time I have no experience in the industry so on the other side I am thinking just go for it and then maybe a year later try to get a full programming job(provided that I got the job). Yet if I am not programming in that job then that experience will not help me for the next job I find as I will be back a square one.

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  • OperationalError "unable to open database file" processing query results with SQLAlchemy and SQLite3

    - by Peter
    I'm running into this little problem that I hope is just a dumb user error. It looks like some sort of a size limit with a query to a SQLite database. I managed to reproduce the issue with an in-memory DB and a simple script shown below. I can make it work by either reducing the number of records in the DB; or by reducing the size of each record; or by dropping the order_by() call. I am using Python 2.5.5 and SQLAlchemy 0.6.0 in a Cygwin environment. Thanks! #!/usr/bin/python from sqlalchemy.orm import sessionmaker import sqlalchemy import sqlalchemy.orm class Person(object): def __init__(self, name): self.name = name engine = sqlalchemy.create_engine('sqlite:///:memory:') Session = sessionmaker(bind=engine) metadata = sqlalchemy.schema.MetaData(bind=engine) person_table = sqlalchemy.Table('person', metadata, sqlalchemy.Column('id', sqlalchemy.types.Integer, primary_key=True), sqlalchemy.Column('name', sqlalchemy.types.String)) metadata.create_all(engine) sqlalchemy.orm.mapper(Person, person_table) session = Session() session.add_all([Person("012345678901234567890123456789012") for i in range(5000)]) session.commit() persons = session.query(Person).order_by(Person.name).all() print "count =", len(persons) session.close() The all() call to the query result fails with the OperationalError exception: Traceback (most recent call last): File "./stress.py", line 27, in <module> persons = session.query(Person).order_by(Person.name).all() File "/usr/lib/python2.5/site-packages/sqlalchemy/orm/query.py", line 1343, in all return list(self) File "/usr/lib/python2.5/site-packages/sqlalchemy/orm/query.py", line 1451, in __iter__ return self._execute_and_instances(context) File "/usr/lib/python2.5/site-packages/sqlalchemy/orm/query.py", line 1456, in _execute_and_instances mapper=self._mapper_zero_or_none()) File "/usr/lib/python2.5/site-packages/sqlalchemy/orm/session.py", line 737, in execute clause, params or {}) File "/usr/lib/python2.5/site-packages/sqlalchemy/engine/base.py", line 1109, in execute return Connection.executors[c](self, object, multiparams, params) File "/usr/lib/python2.5/site-packages/sqlalchemy/engine/base.py", line 1186, in _execute_clauseelement return self.__execute_context(context) File "/usr/lib/python2.5/site-packages/sqlalchemy/engine/base.py", line 1215, in __execute_context context.parameters[0], context=context) File "/usr/lib/python2.5/site-packages/sqlalchemy/engine/base.py", line 1284, in _cursor_execute self._handle_dbapi_exception(e, statement, parameters, cursor, context) File "/usr/lib/python2.5/site-packages/sqlalchemy/engine/base.py", line 1282, in _cursor_execute self.dialect.do_execute(cursor, statement, parameters, context=context) File "/usr/lib/python2.5/site-packages/sqlalchemy/engine/default.py", line 277, in do_execute cursor.execute(statement, parameters) sqlalchemy.exc.OperationalError: (OperationalError) unable to open database file u'SELECT person.id AS person_id, person.name AS person_name \nFROM person ORDER BY person.name' ()

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  • CURL login by script to a Joomla website

    - by Paryeshakaya
    Hello, I need to login by a PHP script that uses CURL to a Joomla website, in order to access to a private page that needs to be processed, but nothwithstanding several attempts I have done, I have always a 403 error. I have done a similar thing with other websites and it worked. Script I use: $uname = "id"; $upswd = "pswd"; $url = "http://www.somewebpage.com"; $agent = "'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6'"; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url ); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE ); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE ); curl_setopt($ch, CURLOPT_COOKIEJAR, './cookie.txt'); curl_setopt($ch, CURLOPT_COOKIEFILE, './cookie.txt'); curl_setopt($ch, CURLOPT_USERAGENT, $agent ); curl_setopt($ch, CURLOPT_HEADER, TRUE ); curl_setopt($ch, CURLOPT_REFERER, $url1); // POST fields $postfields = array(); $postfields['username'] = urlencode($uname); $postfields['passwd'] = urlencode($upswd); $postfields['remember'] = 'yes'; $postfields['option'] = 'login'; $postfields['op2'] = 'login'; $postfields['return'] = urlencode($url); $postfields['message'] = '0'; $postfields['force_session'] = '1'; $postfields['j3b00d36f4336137f4f03335c5eee6440'] = '1'; curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields); $ret = curl_exec($ch); The username and password, as well as the website URL I am using are perfectly working. This is the result I get: HTTP/1.1 100 Continue HTTP/1.1 403 Forbidden Date: Sat, 06 Feb 2010 08:29:36 GMT Server: Apache/2.2.13 (Unix) mod_ssl/2.2.13 OpenSSL/0.9.7a DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 X-Powered-By: PHP/5.2.10 Connection: close Transfer-Encoding: chunked Content-Type: text/html Is there something wrong in my CURL request? Or is there a limit with Joomla remote login? Thanks for suggestions!

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  • Lots of questions about file I/O (reading/writing message strings)

    - by Nazgulled
    Hi, For this university project I'm doing (for which I've made a couple of posts in the past), which is some sort of social network, it's required the ability for the users to exchange messages. At first, I designed my data structures to hold ALL messages in a linked list, limiting the message size to 256 chars. However, I think my instructors will prefer if I save the messages on disk and read them only when I need them. Of course, they won't say what they prefer, I need to make a choice and justify the best I can why I went that route. One thing to keep in mind is that I only need to save the latest 20 messages from each user, no more. Right now I have an Hash Table that will act as inbox, this will be inside the user profile. This Hash Table will be indexed by name (the user that sent the message). The value for each element will be a data structure holding an array of size_t with 20 elements (20 messages like I said above). The idea is to keep track of the disk file offsets and bytes written. Then, when I need to read a message, I just need to use fseek() and read the necessary bytes. I think this could work nicely... I could use just one single file to hold all messages from all users in the network. I'm saying one single file because a colleague asked an instructor about saving the messages from each user independently which he replied that it might not be the best approach cause the file system has it's limits. That's why I'm thinking of going the single file route. However, this presents a problem... Since I only need to save the latest 20 messages, I need to discard the older ones when I reach this limit. I have no idea how to do this... All I know is about fread() and fwrite() to read/write bytes from/to files. How can I go to a file offset and say "hey, delete the following X bytes"? Even if I could do that, there's another problem... All offsets below that one will be completely different and I would have to process all users mailboxes to fix the problem. Which would be a pain... So, any suggestions to solve my problems? What do you suggest?

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  • Hive NR map progress inconsistent and regurlarly restart from 0%

    - by user92471
    I have a Yarn MR (with two ec2 instances to mapreduce) job on a dataset of approximately a thousand avro records, and the map phase is behaving erratically. See the progress below. Of course i checked the logs on resourcemanager and nodemanagers and saw nothing suspicious, but these logs are too verbose What is going on there ? hive> select * from nikon where qs_cs_s_aid='VIEW' limit 10; Total MapReduce jobs = 1 Launching Job 1 out of 1 Number of reduce tasks is set to 0 since there's no reduce operator Starting Job = job_1352281315350_0020, Tracking URL = http://blabla.ec2.internal:8088/proxy/application_1352281315350_0020/ Kill Command = /usr/lib/hadoop/bin/hadoop job -Dmapred.job.tracker=blabla.com:8032 -kill job_1352281315350_0020 Hadoop job information for Stage-1: number of mappers: 4; number of reducers: 0 2012-11-07 11:14:40,976 Stage-1 map = 0%, reduce = 0% 2012-11-07 11:15:06,136 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 10.38 sec 2012-11-07 11:15:07,253 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 12.18 sec 2012-11-07 11:15:08,371 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 12.18 sec 2012-11-07 11:15:09,491 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 12.18 sec 2012-11-07 11:15:10,643 Stage-1 map = 2%, reduce = 0%, Cumulative CPU 15.42 sec (...) 2012-11-07 11:15:35,441 Stage-1 map = 28%, reduce = 0%, Cumulative CPU 37.77 sec 2012-11-07 11:15:36,486 Stage-1 map = 28%, reduce = 0%, Cumulative CPU 37.77 sec here restart at 16% ? 2012-11-07 11:15:37,692 Stage-1 map = 16%, reduce = 0%, Cumulative CPU 21.15 sec 2012-11-07 11:15:38,815 Stage-1 map = 16%, reduce = 0%, Cumulative CPU 21.15 sec 2012-11-07 11:15:39,865 Stage-1 map = 16%, reduce = 0%, Cumulative CPU 21.15 sec 2012-11-07 11:15:41,064 Stage-1 map = 18%, reduce = 0%, Cumulative CPU 22.4 sec 2012-11-07 11:15:42,181 Stage-1 map = 18%, reduce = 0%, Cumulative CPU 22.4 sec 2012-11-07 11:15:43,299 Stage-1 map = 18%, reduce = 0%, Cumulative CPU 22.4 sec here restart at 0% ? 2012-11-07 11:15:44,418 Stage-1 map = 0%, reduce = 0% 2012-11-07 11:16:02,076 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 6.86 sec 2012-11-07 11:16:03,193 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 6.86 sec 2012-11-07 11:16:04,259 Stage-1 map = 2%, reduce = 0%, Cumulative CPU 8.45 sec (...) 2012-11-07 11:16:31,291 Stage-1 map = 22%, reduce = 0%, Cumulative CPU 35.34 sec 2012-11-07 11:16:32,414 Stage-1 map = 26%, reduce = 0%, Cumulative CPU 37.93 sec here restart at 11% ? 2012-11-07 11:16:33,459 Stage-1 map = 11%, reduce = 0%, Cumulative CPU 19.53 sec 2012-11-07 11:16:34,507 Stage-1 map = 11%, reduce = 0%, Cumulative CPU 19.53 sec 2012-11-07 11:16:35,731 Stage-1 map = 13%, reduce = 0%, Cumulative CPU 21.47 sec (...) 2012-11-07 11:16:46,839 Stage-1 map = 17%, reduce = 0%, Cumulative CPU 24.14 sec here restart at 0% ? 2012-11-07 11:16:47,939 Stage-1 map = 0%, reduce = 0% 2012-11-07 11:16:56,653 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 7.54 sec 2012-11-07 11:16:57,814 Stage-1 map = 1%, reduce = 0%, Cumulative CPU 7.54 sec (...) Needless to say the job crashes after some time with an Error: java.io.IOException: java.io.IOException: java.lang.ArrayIndexOutOfBoundsException: -56

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  • dublicate display of Posts from controller - conditions and joins problem - Ruby on Rails

    - by bgadoci
    I have built a blog application using Ruby on Rails. In the application I have posts and tags. Post has_many :tags and Tag belongs_to :post. In the /views/posts/index.html view I want to display two things. First is a listing of all posts displayed 'created_at DESC' and then in the side bar I am wanting to reference my Tags table, group records, and display as a link that allows for viewing all posts with that tag. With the code below, I am able to display the tag groups and succesfully display all posts with that tag. There are two problems with it thought. /posts view, the code seems to be referencing the Tag table and displaying the post multiple times, directly correlated to how many tags that post has. (i.e. if the post has 3 tags it will display the post 3 times). /posts view, only displays posts that have Tags. If the post doesn't have a tag, no display at all. /views/posts/index.html.erb <%= render :partial => @posts %> /views/posts/_post.html.erb <% div_for post do %> <h2><%= link_to_unless_current h(post.title), post %></h2> <i>Posted <%= time_ago_in_words(post.created_at) %></i> ago <%= simple_format h truncate(post.body, :length => 300) %> <%= link_to "Read More", post %> | <%= link_to "View & Add Comments (#{post.comments.count})", post %> <hr/> <% end %> /models/post.rb class Post < ActiveRecord::Base validates_presence_of :body, :title has_many :comments, :dependent => :destroy has_many :tags, :dependent => :destroy cattr_reader :per_page @@per_page = 10 end posts_controller.rb def index @tag_counts = Tag.count(:group => :tag_name, :order => 'updated_at DESC', :limit => 10) @posts=Post.all(:joins => :tags,:conditions=>(params[:tag_name] ? { :tags => { :tag_name => params[:tag_name] }} : {} ) ).paginate :page => params[:page], :per_page => 5 respond_to do |format| format.html # index.html.erb format.xml { render :xml => @posts } format.json { render :json => @posts } format.atom end end

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  • Python - calculate multinomial probability density functions on large dataset?

    - by Seafoid
    Hi, I originally intended to use MATLAB to tackle this problem but the inbuilt functions has limitations that do not suit my goal. The same limitation occurs in NumPy. I have two tab-delimited files. The first is a file showing amino acid residue, frequency and count for an in-house database of protein structures, i.e. A 0.25 1 S 0.25 1 T 0.25 1 P 0.25 1 The second file consists of quadruplets of amino acids and the number of times they occur, i.e. ASTP 1 Note, there are 8,000 such quadruplets. Based on the background frequency of occurence of each amino acid and the count of quadruplets, I aim to calculate the multinomial probability density function for each quadruplet and subsequently use it as the expected value in a maximum likelihood calculation. The multinomial distribution is as follows: f(x|n, p) = n!/(x1!*x2!*...*xk!)*((p1^x1)*(p2^x2)*...*(pk^xk)) where x is the number of each of k outcomes in n trials with fixed probabilities p. n is 4 four in all cases in my calculation. I have created three functions to calculate this distribution. # functions for multinomial distribution def expected_quadruplets(x, y): expected = x*y return expected # calculates the probabilities of occurence raised to the number of occurrences def prod_prob(p1, a, p2, b, p3, c, p4, d): prob_prod = (pow(p1, a))*(pow(p2, b))*(pow(p3, c))*(pow(p4, d)) return prob_prod # factorial() and multinomial_coefficient() work in tandem to calculate C, the multinomial coefficient def factorial(n): if n <= 1: return 1 return n*factorial(n-1) def multinomial_coefficient(a, b, c, d): n = 24.0 multi_coeff = (n/(factorial(a) * factorial(b) * factorial(c) * factorial(d))) return multi_coeff The problem is how best to structure the data in order to tackle the calculation most efficiently, in a manner that I can read (you guys write some cryptic code :-)) and that will not create an overflow or runtime error. To data my data is represented as nested lists. amino_acids = [['A', '0.25', '1'], ['S', '0.25', '1'], ['T', '0.25', '1'], ['P', '0.25', '1']] quadruplets = [['ASTP', '1']] I initially intended calling these functions within a nested for loop but this resulted in runtime errors or overfloe errors. I know that I can reset the recursion limit but I would rather do this more elegantly. I had the following: for i in quadruplets: quad = i[0].split(' ') for j in amino_acids: for k in quadruplets: for v in k: if j[0] == v: multinomial_coefficient(int(j[2]), int(j[2]), int(j[2]), int(j[2])) I haven'te really gotten to how to incorporate the other functions yet. I think that my current nested list arrangement is sub optimal. I wish to compare the each letter within the string 'ASTP' with the first component of each sub list in amino_acids. Where a match exists, I wish to pass the appropriate numeric values to the functions using indices. Is their a better way? Can I append the appropriate numbers for each amino acid and quadruplet to a temporary data structure within a loop, pass this to the functions and clear it for the next iteration? Thanks, S :-)

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  • How to use c++0x thread in Android NDK?

    - by m-ric
    I am trying to compile this simple program with android-ndk-r8b: jni/hello_jni.cpp #include <iostream> #include <thread> void hello() { std::cout << "Hi i'm a thread!!!" << std::endl; } int main() { std::thread th(hello); th.join(); return 0; } jni/Application.mk APP_OPTIM := release APP_MODULES := hello_thread APP_STL := gnustl_static jni/Android.mk LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_CPPFLAGS += -std=c++0x -frtti LOCAL_MODULE := hello_thread LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -pthread LOCAL_SRC_FILES := hello_thread.cpp include $(BUILD_EXECUTABLE) ndk-build returns me an error arguin that 'thread' is not a member of 'std'. I issued ndk-build -n to get the compilation command and issued it alone in my shell: /home/evigier/android-ndk-r8b/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -MMD -MP -MF /home/evigier/eclipse_workspace/hello_thread/obj/local/armeabi/objs/hello_thread/hello_thread.o.d -fpic -ffunction-sections -funwind-tables -fstack-protector -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -march=armv5te -mtune=xscale -msoft-float -fno-exceptions -fno-rtti -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -I/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include -I/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi/include -I/home/evigier/eclipse_workspace/hello_thread/jni -DANDROID -Wa,--noexecstack -std=c++0x -frtti -O2 -DNDEBUG -g -I/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include -c /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp -o /home/evigier/eclipse_workspace/hello_thread/obj/local/armeabi/objs/hello_thread/hello_thread.o Compile++ thumb : hello_thread <= hello_thread.cpp In file included from /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/stdio.h:55:0, from /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/wchar.h:33, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/cwchar:46, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/postypes.h:42, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iosfwd:42, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ios:39, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ostream:40, from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iostream:40, from jni/hello_thread.cpp:4: /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/sys/types.h:124:9: error: 'uint64_t' does not name a type /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp: In function 'int main()': /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:5: error: 'thread' is not a member of 'std' /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:17: error: expected ';' before 'th' /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:15:5: error: 'th' was not declared in this scope I read a lot of threads/questions about POSIX threads and C++ threads, but still cannot find my answer. My arm-linux-androideabi/include/c++/4.6/thread file defines class thread in std only: #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) They don't seem to be defined in my sdk (c++config.h). But how can I possibly turn them on safely? Do i need to compile my own toolchain to use (non-p)threads? My host computer is : Linux evigier-ThinkPad-X220 3.0.0-17-generic #30-Ubuntu SMP Thu Mar 8 20:45:39 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

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  • getting rid of filesort on WordPress MySQL query

    - by Hans
    An instance of WordPress that I manage goes down about once a day due to this monster MySQL query taking far too long: SELECT SQL_CALC_FOUND_ROWS distinct wp_posts.* FROM wp_posts LEFT JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) LEFT JOIN wp_term_taxonomy ON wp_term_taxonomy.term_taxonomy_id = wp_term_relationships.term_taxonomy_id LEFT JOIN wp_ec3_schedule ec3_sch ON ec3_sch.post_id=id WHERE 1=1 AND wp_posts.ID NOT IN ( SELECT tr.object_id FROM wp_term_relationships AS tr INNER JOIN wp_term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy = 'category' AND tt.term_id IN ('1050') ) AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish') AND NOT EXISTS (SELECT * FROM wp_term_relationships JOIN wp_term_taxonomy ON wp_term_taxonomy.term_taxonomy_id = wp_term_relationships.term_taxonomy_id WHERE wp_term_relationships.object_id = wp_posts.ID AND wp_term_taxonomy.taxonomy = 'category' AND wp_term_taxonomy.term_id IN (533,3567) ) AND ec3_sch.post_id IS NULL GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 10; What do I have to do to get rid of the very slow filesort? I would think that the multicolumn type_status_date index would be fast enough. The EXPLAIN EXTENDED output is below. +----+--------------------+-----------------------+--------+-----------------------------------+------------------+---------+---------------------------------------------------------------------------------+------+----------------------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+--------------------+-----------------------+--------+-----------------------------------+------------------+---------+---------------------------------------------------------------------------------+------+----------------------------------------------+ | 1 | PRIMARY | wp_posts | ref | type_status_date | type_status_date | 124 | const,const | 7034 | Using where; Using temporary; Using filesort | | 1 | PRIMARY | wp_term_relationships | ref | PRIMARY | PRIMARY | 8 | bwog_wordpress_w.wp_posts.ID | 373 | Using index | | 1 | PRIMARY | wp_term_taxonomy | eq_ref | PRIMARY | PRIMARY | 8 | bwog_wordpress_w.wp_term_relationships.term_taxonomy_id | 1 | Using index | | 1 | PRIMARY | ec3_sch | ref | post_id_index | post_id_index | 9 | bwog_wordpress_w.wp_posts.ID | 1 | Using where; Using index | | 3 | DEPENDENT SUBQUERY | wp_term_taxonomy | range | PRIMARY,term_id_taxonomy,taxonomy | term_id_taxonomy | 106 | NULL | 2 | Using where | | 3 | DEPENDENT SUBQUERY | wp_term_relationships | eq_ref | PRIMARY,term_taxonomy_id | PRIMARY | 16 | bwog_wordpress_w.wp_posts.ID,bwog_wordpress_w.wp_term_taxonomy.term_taxonomy_id | 1 | Using index | | 2 | DEPENDENT SUBQUERY | tt | const | PRIMARY,term_id_taxonomy,taxonomy | term_id_taxonomy | 106 | const,const | 1 | | | 2 | DEPENDENT SUBQUERY | tr | eq_ref | PRIMARY,term_taxonomy_id | PRIMARY | 16 | func,const | 1 | Using index | +----+--------------------+-----------------------+--------+-----------------------------------+------------------+---------+---------------------------------------------------------------------------------+------+----------------------------------------------+ 8 rows in set, 2 warnings (0.05 sec) And CREATE TABLE: CREATE TABLE `wp_posts` ( `ID` bigint(20) unsigned NOT NULL auto_increment, `post_author` bigint(20) unsigned NOT NULL default '0', `post_date` datetime NOT NULL default '0000-00-00 00:00:00', `post_date_gmt` datetime NOT NULL default '0000-00-00 00:00:00', `post_content` longtext NOT NULL, `post_title` text NOT NULL, `post_excerpt` text NOT NULL, `post_status` varchar(20) NOT NULL default 'publish', `comment_status` varchar(20) NOT NULL default 'open', `ping_status` varchar(20) NOT NULL default 'open', `post_password` varchar(20) NOT NULL default '', `post_name` varchar(200) NOT NULL default '', `to_ping` text NOT NULL, `pinged` text NOT NULL, `post_modified` datetime NOT NULL default '0000-00-00 00:00:00', `post_modified_gmt` datetime NOT NULL default '0000-00-00 00:00:00', `post_content_filtered` text NOT NULL, `post_parent` bigint(20) unsigned NOT NULL default '0', `guid` varchar(255) NOT NULL default '', `menu_order` int(11) NOT NULL default '0', `post_type` varchar(20) NOT NULL default 'post', `post_mime_type` varchar(100) NOT NULL default '', `comment_count` bigint(20) NOT NULL default '0', `robotsmeta` varchar(64) default NULL, PRIMARY KEY (`ID`), KEY `post_name` (`post_name`), KEY `type_status_date` (`post_type`,`post_status`,`post_date`,`ID`), KEY `post_parent` (`post_parent`), KEY `post_date` (`post_date`), FULLTEXT KEY `post_related` (`post_title`,`post_content`) )

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  • iPhone SDK: Audio Queue control

    - by codemercenary
    Hi all, I am new to the audio queue services so I have taken an example from a book called iPhone Cool Projects where it describes how to stream audio. I want to extend this to being able to play a continuous playlist of links to mp3 files like an internet radio. The problem with the example code it that it does not detect when a stream ends and does not call AudioQueueStop at any point, so I added a counter to number of buffers added to the queue, and then decrement this counter each time audioQueueOutputCallback is called by the queue. This works fine except if when the buffer count goes to 0, and then I add a call AudioQueueFlush(audioQueue) and then AudioQueueStop(audioQueue, false) I get an error. If I only call AudioQueueReset, it continues to load the buffers again, but plays them out faster then it loads them... getting stuck in a loop and then crashing. 2010-04-14 13:56:29.745 AudioPlayer[2269:207] init player with URL 2010-04-14 13:56:29.941 AudioPlayer[2269:207] did recieve data 2010-04-14 13:56:29.942 AudioPlayer[2269:207] audio request didReceiveData 2010-04-14 13:56:29.944 AudioPlayer[2269:207] >>> start audio queue 2010-04-14 13:56:29.960 AudioPlayer[2269:207] packetCallback count 2 2010-04-14 13:56:29.961 AudioPlayer[2269:207] add buffer: 1 2010-04-14 13:56:29.962 AudioPlayer[2269:207] did recieve data 2010-04-14 13:56:29.963 AudioPlayer[2269:207] audio request didReceiveData 2010-04-14 13:56:29.963 AudioPlayer[2269:207] packetCallback count 1 2010-04-14 13:56:29.964 AudioPlayer[2269:207] add buffer: 2 2010-04-14 13:56:29.965 AudioPlayer[2269:207] packetCallback count 13 2010-04-14 13:56:29.967 AudioPlayer[2269:207] add buffer: 3 2010-04-14 13:56:29.968 AudioPlayer[2269:207] done with buffer: 3 2010-04-14 13:56:29.969 AudioPlayer[2269:207] done with buffer: 2 2010-04-14 13:56:29.974 AudioPlayer[2269:207] done with buffer: 1 So this loop continues some 20 - 30 times and then it crashes. The first time it plays an audio file it queues up the buffers and then plays sound, but doesn't callback to delete them until some 100 or more have been played. Can anyone explain this behavior? I read that there was a limit of 1 audio queue for MP3 playback for the iPhone. Is that still true? If not then I suppose I should use another audio queue for the next mp3 stream. I've had a look through the apple docs but it doesn't explain this in any particular detail. A better insight into this would be great. TIA.

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  • The Skyline Problem.

    - by zeroDivisible
    I just came across this little problem on UVA's Online Judge and thought, that it may be a good candidate for a little code-golf. The problem: You are to design a program to assist an architect in drawing the skyline of a city given the locations of the buildings in the city. To make the problem tractable, all buildings are rectangular in shape and they share a common bottom (the city they are built in is very flat). The city is also viewed as two-dimensional. A building is specified by an ordered triple (Li, Hi, Ri) where Li and Ri are left and right coordinates, respectively, of building i and Hi is the height of the building. In the diagram below buildings are shown on the left with triples (1,11,5), (2,6,7), (3,13,9), (12,7,16), (14,3,25), (19,18,22), (23,13,29), (24,4,28) and the skyline, shown on the right, is represented by the sequence: 1, 11, 3, 13, 9, 0, 12, 7, 16, 3, 19, 18, 22, 3, 23, 13, 29, 0 The output should consist of the vector that describes the skyline as shown in the example above. In the skyline vector (v1, v2, v3, ... vn) , the vi such that i is an even number represent a horizontal line (height). The vi such that i is an odd number represent a vertical line (x-coordinate). The skyline vector should represent the "path" taken, for example, by a bug starting at the minimum x-coordinate and traveling horizontally and vertically over all the lines that define the skyline. Thus the last entry in the skyline vector will be a 0. The coordinates must be separated by a blank space. If I will not count declaration of provided (test) buildings and including all spaces and tab characters, my solution, in Python, is 223 characters long. Here is the condensed version: B=[[1,11,5],[2,6,7],[3,13,9],[12,7,16],[14,3,25],[19,18,22],[23,13,29],[24,4,28]] # Solution. R=range v=[0 for e in R(max([y[2] for y in B])+1)] for b in B: for x in R(b[0], b[2]): if b[1]>v[x]: v[x]=b[1] p=1 k=0 for x in R(len(v)): V=v[x] if p and V==0: continue elif V!=k: p=0 print "%s %s" % (str(x), str(V)), k=V I think that I didn't made any mistake but if so - feel free to criticize me. EDIT I don't have much reputation, so I will pay only 100 for a bounty - I am curious, if anyone could try to solve this in less than .. lets say, 80 characters. Solution posted by cobbal is 101 characters long and currently it is the best one. ANOTHER EDIT I thought, that 80 characters is a sick limit for this kind of problem. cobbal, with his 46 character solution totaly amazed me - though I must admit, that I spent some time reading his explanation before I partially understood what he had written.

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  • link_to passing paramater and display problem - tag feature - Ruby on Rails

    - by bgadoci
    I have gotten a great deal of help from KandadaBoggu on my last question and very very thankful for that. As we were getting buried in the comments I wanted to break this part out. I am attempting to create a tag feature on the rails blog I am developing. The relationship is Post has_many :tags and Tag belongs_to :post. Adding and deleting tags to posts are working great. In my /view/posts/index.html.erb I have a section called tags where I am successfully querying the Tags table, grouping them and displaying the count next to the tag_name (as a side note, I mistakenly called the column containing the tag name, 'tag_name' instead of just 'name' as I should have) . In addition the display of these groups are a link that is referencing the index method in the PostsController. That is where the problem is. When you navigate to /posts you get an error because there is no parameter being passed (without clicking the tag group link). I have the .empty? in there so not sure what is going wrong here. Here is the error and code: Error You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.empty? /views/posts/index.html.erb <% @tag_counts.each do |tag_name, tag_count| %> <tr> <td><%= link_to(tag_name, posts_path(:tag_name => tag_name)) %></td> <td>(<%=tag_count%>)</td> </tr> <% end %> PostsController def index @tag_counts = Tag.count(:group => :tag_name, :order => 'updated_at DESC', :limit => 10) @posts=Post.all(:joins => :tags,:conditions=>(params[:tag_name].empty? ? {}: { :tags => { :tag_name => params[:tag_name] }} ) ) respond_to do |format| format.html # index.html.erb format.xml { render :xml => @posts } format.json { render :json => @posts } format.atom end end

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  • Java language features which have no equivalent in C#

    - by jthg
    Having mostly worked with C#, I tend to think in terms of C# features which aren't available in Java. After working extensively with Java over the last year, I've started to discover Java features that I wish were in C#. Below is a list of the ones that I'm aware of. Can anyone think of other Java language features which a person with a C# background may not realize exists? The articles http://www.25hoursaday.com/CsharpVsJava.html and http://en.wikipedia.org/wiki/Comparison_of_Java_and_C_Sharp give a very extensive list of differences between Java and C#, but I wonder whether I missed anything in the (very) long articles. I can also think of one feature (covariant return type) which I didn't see mentioned in either article. Please limit answers to language or core library features which can't be effectively implemented by your own custom code or third party libraries. Covariant return type - a method can be overridden by a method which returns a more specific type. Useful when implementing an interface or extending a class and you want a method to override a base method, but return a type more specific to your class. Enums are classes - an enum is a full class in java, rather than a wrapper around a primitive like in .Net. Java allows you to define fields and methods on an enum. Anonymous inner classes - define an anonymous class which implements a method. Although most of the use cases for this in Java are covered by delegates in .Net, there are some cases in which you really need to pass multiple callbacks as a group. It would be nice to have the choice of using an anonymous inner class. Checked exceptions - I can see how this is useful in the context of common designs used with Java applications, but my experience with .Net has put me in a habit of using exceptions only for unrecoverable conditions. I.E. exceptions indicate a bug in the application and are only caught for the purpose of logging. I haven't quite come around to the idea of using exceptions for normal program flow. strictfp - Ensures strict floating point arithmetic. I'm not sure what kind of applications would find this useful. fields in interfaces - It's possible to declare fields in interfaces. I've never used this. static imports - Allows one to use the static methods of a class without qualifying it with the class name. I just realized today that this feature exists. It sounds like a nice convenience.

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  • ASP.Net Web Farm Monitoring

    - by cisellis
    I am looking for suggestions on doing some simple monitoring of an ASP.Net web farm as close to real-time as possible. The objectives of this question are to: Identify the best way to monitor several Windows Server production boxes during short (minutes long) period of ridiculous load Receive near-real-time feedback on a few key metrics about each box. These are simple metrics available via WMI such as CPU, Memory and Disk Paging. I am defining my time constraints as soon as possible with 120 seconds delayed being the absolute upper limit. Monitor whether any given box is up (with "up" being defined as responding web requests in a reasonable amount of time) Here are more details, things I've tried, etc. I am not interested in logging. We have logging solutions in place. I have looked at solutions such as ELMAH which don't provide much in the way of hardware monitoring and are not visible across an entire web farm. ASP.Net Health Monitoring is too broad, focuses too much on logging and is not acceptable for deep analysis. We are on Amazon Web Services and we have looked into CloudWatch. It looks great but messages in the forum indicate that the metrics are often a few minutes behind, with one thread citing 2 minutes as the absolute soonest you could expect to receive the feedback. This would be good to have for later analysis but does not help us real-time Stuff like JetBrains profiler is good for testing but again, not helpful during real-time monitoring. The closest out-of-box solution I've seen is Nagios which is free and appears to measure key indicators on any kind of box, including Windows. However, it appears to require a Linux box to run itself on and a good deal of manual configuration. I'd prefer to not spend my time mining config files and then be up a creek when it fails in production since Linux is not my main (or even secondary) environment. Are there any out-of-box solutions that I am missing? Obviously a windows-based solution that is easy to setup is ideal. I don't require many bells and whistles. In the absence of an out-of-box solution, it seems easy for me to write something simple to handle what I need. I've been thinking a simple client-server setup where the server requests a few WMI metrics from each client over http and sticks them in a database. We could then monitor the metrics via a query or a dashboard or something. If the client doesn't respond, it's effectively down. Any problems with this, best practices, or other ideas? Thanks for any help/feedback.

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  • Oracle 9i Session Disconnections

    - by mlaverd
    [Cross-Posting from ServerFault] I am in a development environment, and our test Oracle 9i server has been misbehaving for a few days now. What happens is that we have our JDBC connections disconnecting after a few successful connections. We got this box set up by our IT department and handed over to. It is 'our problem', so options like 'ask you DBA' isn't going to help me. :( Our server is set up with 3 plain databases (one is the main dev db, the other is the 'experimental' dev db). We use the Oracle 10 ojdbc14.jar thin JDBC driver (because of some bug in the version 9 of the driver). We're using Hibernate to talk to the DB. The only thing that I can see that changed is that we now have more users connecting to the server. Instead of one developer, we now have 3. With the Hibernate connection pools, I'm thinking that maybe we're hitting some limit? Anyone has any idea what's going on? Here's the stack trace on the client: Caused by: org.hibernate.exception.GenericJDBCException: could not execute query at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126) [hibernate3.jar:na] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114) [hibernate3.jar:na] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) [hibernate3.jar:na] at org.hibernate.loader.Loader.doList(Loader.java:2235) [hibernate3.jar:na] at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129) [hibernate3.jar:na] at org.hibernate.loader.Loader.list(Loader.java:2124) [hibernate3.jar:na] at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401) [hibernate3.jar:na] at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363) [hibernate3.jar:na] at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) [hibernate3.jar:na] at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149) [hibernate3.jar:na] at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) [hibernate3.jar:na] ... Caused by: java.sql.SQLException: Io exception: Connection reset at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:829) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1049) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:854) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1154) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3370) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3415) [ojdbc14.jar:Oracle JDBC Driver version - "10.2.0.4.0"] at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208) [hibernate3.jar:na] at org.hibernate.loader.Loader.getResultSet(Loader.java:1812) [hibernate3.jar:na] at org.hibernate.loader.Loader.doQuery(Loader.java:697) [hibernate3.jar:na] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) [hibernate3.jar:na] at org.hibernate.loader.Loader.doList(Loader.java:2232) [hibernate3.jar:na]

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  • Filter chain halted as [:login_required] rendered_or_redirected

    - by Magicked
    Hopefully I can explain this well enough, but please let me know if more information is needed! I'm building a form where a user can create an "incident". This incident has the following relationships: belongs_to: customer (customer has_many incidents) belongs_to: user (user has_many incidents) has_one: incident_status (incident_status belongs to incident) The form allows the user to assign the incident to a user (select form) and then select an incident status. The incident is nested in customer. However, I'm getting the following in the server logs: Processing IncidentsController#create (for 127.0.0.1 at 2010-04-26 10:41:33) [POST] Parameters: {"commit"=>"Create", "action"=>"create", "authenticity_token"=>"YhW++vd/dnLoNV/DSl1DULcaWq/RwP7jvLOVx9jQblA=", "customer_id"=>"4", "controller"=>"incidents", "incident"=>{"title"=>"Some Bad Incident", "incident_status_id"=>"1", "user_id"=>"2", "other_name"=>"SS01-042310-001"}} User Load (0.3ms) SELECT * FROM "users" WHERE ("users"."id" = 2) LIMIT 1 Redirected to http://localhost:3000/session/new Filter chain halted as [:login_required] rendered_or_redirected. Completed in 55ms (DB: 0) | 302 Found [http://localhost/customers/4/incidents] It looks to me like it's trying to gather information about the user, even though it already has the id (which is all it needs to create the incident), and the user may not have permission to do a select statement like that? I'm rather confused. Here is the relevant (I think) information in the Incident controller. before_filter :login_required, :get_customer def new @incident = @customer.incidents.build @users = @customer.users @statuses = IncidentStatus.find(:all) respond_to do |format| format.html # new.html.erb format.xml { render :xml => @incident } end end def create @incident = @customer.incidents.build(params[:incident]) respond_to do |format| if @incident.save flash[:notice] = 'Incident was successfully created.' format.html { redirect_to(@incident) } format.xml { render :xml => @incident, :status => :created, :location => @incident } else format.html { render :action => "new" } format.xml { render :xml => @incident.errors, :status => :unprocessable_entity } end end end Just as an FYI, I am using the restful_authentication plugin. So in summary, when I submit the incident creation form, it does not save the incident because it halts. I'm still very new to rails, so my skill at diagnosing problems like this is still very bad. I'm going in circles. :) Thanks in advance for any help. Please let me know if more information is needed and I'll edit it in!

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  • PHP throws 'Allowed memory exhausted' errors while migrating data in Drupal.

    - by Stan
    I'm trying to setup a tiny sandbox on a local machine to play around with Drupal. I created a few CCK types; in order to create a few nodes I wrote the following script: chdir('C:\..\drupal'); require_once '.\includes\bootstrap.inc'; drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL); module_load_include('inc', 'node', 'node.pages'); $node = array('type' => 'my_type'); $link = mysql_connect(..); mysql_select_db('my_db'); $query_bldg = ' SELECT stuff FROM table LIMIT 10 '; $result = mysql_query($query_bldg); while ($row = mysql_fetch_object($result)) { $form_state = array(); $form_state['values']['name'] = 'admin'; $form_state['values']['status'] = 1; $form_state['values']['op'] = t('Save'); $form_state['values']['title'] = $row->val_a; $form_state['values']['my_field'][0]['value'] = $row->val_b; ## About another dozen or so of similar assignments... drupal_execute('node_form', $form_state, (object)$node); } Here are a few relevant lines from php_errors.log: [12-Jun-2010 05:02:47] PHP Notice: Undefined index: REMOTE_ADDR in C:\..\drupal\includes\bootstrap.inc on line 1299 [12-Jun-2010 05:02:47] PHP Notice: Undefined index: REMOTE_ADDR in C:\..\drupal\includes\bootstrap.inc on line 1299 [12-Jun-2010 05:02:47] PHP Warning: session_start(): Cannot send session cookie - headers already sent by (output started at C:\..\drupal\includes\bootstrap.inc:1299) in C:\..\drupal\includes\bootstrap.inc on line 1143 [12-Jun-2010 05:02:47] PHP Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:\..\drupal\includes\bootstrap.inc:1299) in C:\..\drupal\includes\bootstrap.inc on line 1143 [12-Jun-2010 05:02:47] PHP Warning: Cannot modify header information - headers already sent by (output started at C:\..\drupal\includes\bootstrap.inc:1299) in C:\..\drupal\includes\bootstrap.inc on line 709 [12-Jun-2010 05:02:47] PHP Warning: Cannot modify header information - headers already sent by (output started at C:\..\drupal\includes\bootstrap.inc:1299) in C:\..\drupal\includes\bootstrap.inc on line 710 [12-Jun-2010 05:02:47] PHP Warning: Cannot modify header information - headers already sent by (output started at C:\..\drupal\includes\bootstrap.inc:1299) in C:\..\drupal\includes\bootstrap.inc on line 711 [12-Jun-2010 05:02:47] PHP Warning: Cannot modify header information - headers already sent by (output started at C:\..\drupal\includes\bootstrap.inc:1299) in C:\..\drupal\includes\bootstrap.inc on line 712 [12-Jun-2010 05:02:47] PHP Notice: Undefined index: REMOTE_ADDR in C:\..\drupal\includes\bootstrap.inc on line 1299 [12-Jun-2010 05:02:48] PHP Fatal error: Allowed memory size of 239075328 bytes exhau sted (tried to allocate 261904 bytes) in C:\..\drupal\includes\form.inc on line 488 [12-Jun-2010 05:03:22] PHP Fatal error: Allowed memory size of 239075328 bytes exhausted (tried to allocate 261904 bytes) in C:\..\drupal\includes\form.inc on line 488 [12-Jun-2010 05:04:34] PHP Fatal error: Allowed memory size of 262144 bytes exhausted (tried to allocate 261904 bytes) in Unknown on line 0 At this point any action php takes results in the last error shown above. I tried increasing the value of memory_limit in php.ini before the final Fatal error which obviously didn't help. How can the error be eliminated? Am I on a correct path to migrating data into Drupal or should the cck tables be operated on directly? Windows XP PHP 5.3.2 VC6 Apache 2.2

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  • Best practices for sending automated daily emails from web service

    - by Tauren
    I am running a web service that currently sends confirmation emails out to new users via the gmail smtp servers. As I'm only getting a few new users each day, this hasn't been a problem. I've recently added new features to the webapp that will require a customized message to be sent out to each user every day. Think of this as similar to the regular messages LinkedIn sends out that give you a status report on the activity in your network. Every user's message will be different. With thousands of users, this means thousands of unique messages will be sent each day. Edit: I've since found that these types of email are called "transactional or relationship messages". Spamtacular has a good article on differentiating between marketing and transactional email. I don't think using gmail's smtp servers will cut it anymore, but I don't know that for sure. I don't know what gmail's maximum outgoing messages per account is (it might be 100/day), but they limit outgoing mail to 500 recipients per message. I'm not sending a single message to 500 recipients, but I'm going to be sending 1000's of customized messages with each recipient getting one per day. I'm interested to learn any best practices for doing this (especially for Java-based webapps). Here are some of my thoughts and concerns on it: Should I set up my own outgoing mail server? If I do this, it seems like I'll have all sorts of other issues to worry about, such as preventing mail server abuse, monitoring bounces, allowing ways to opt-out of emails, etc. Are there any tools or services to help with this? Maybe something like OpenEMM or a services like MailChimp? But those seem focused more toward email marketing campaigns. I don't think I should have the webapp itself handle sending emails as it currently is for new user signups. I'm thinking I should setup a separate messaging server that can access the same backend/datastore as the webapp. Thoughts on this? Should I consider setting up some sort of message queueing service to help with this, such as JMS, RabbitMQ, ActiveMQ, etc.? Do I need to provide users a way to opt-out? Do I need to flag these as bulk messages? I don't really consider these email marketing messages, but I'm unsure what is considered appropriate or proper netiquette. Any advice is appreciated. I'm also very interested in open source tools or web services that simplify things and could help me to ramp up as quickly as possible. Thanks!

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