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  • NHibernate LINQ query throws error "Could not resolve property"

    - by Xorandor
    I'm testing out using LINQ with NHibernate but have run into some problems with resolving string.length. I have the following public class DC_Control { public virtual int ID { get; private set; } public virtual string Name { get; set; } public virtual bool IsEnabled { get; set; } public virtual string Url { get; set; } public virtual string Category { get; set; } public virtual string Description { get; set; } public virtual bool RequireScriptManager { get; set; } public virtual string TriggerQueryString { get; set; } public virtual DateTime? DateAdded { get; set; } public virtual DateTime? DateUpdated { get; set; } } public class DC_ControlMap : ClassMap<DC_Control> { public DC_ControlMap() { Id(x => x.ID); Map(x => x.Name).Length(128); Map(x => x.IsEnabled); Map(x => x.Url); Map(x => x.Category); Map(x => x.Description); Map(x => x.RequireScriptManager); Map(x => x.TriggerQueryString); Map(x => x.DateAdded); Map(x => x.DateUpdated); } } private static ISessionFactory CreateSessionFactory() { return Fluently.Configure() .Database(FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2008) .Mappings(m => m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly())) .ExposeConfiguration(c => c.SetProperty("connection.connection_string", "CONNSTRING")) .ExposeConfiguration(c => c.SetProperty("proxyfactory.factory_class", "NHibernate.ByteCode.Castle.ProxyFactoryFactory,NHibernate.ByteCode.Castle")) .BuildSessionFactory(); } public static void test() { using (ISession session = sessionFactory.OpenSession()) { var sqlQuery = session.CreateSQLQuery("select * from DC_Control where LEN(url) > 80").AddEntity(typeof(DC_Control)).List<DC_Control>(); var linqQuery= session.Linq<DC_Control>().Where(c => c.Url.Length > 80).ToList(); } } In my test method I first try and perform the query using SQL, this works just fine. Then I want to do the same thing in LINQ, and it throws the following error: NHibernate.QueryException: could not resolve property: Url.Length of: DC_Control I've searched alot for this "could not resolve property" error, but I can't quite figure out, what this means. Is this because the LINQ implementation is not complete? If so it's a bit disappointing coming from Linq2Sql where this would just work. I also tried it setting up the mapping with a hbm.xml instead of using FluentNHibernate but it produced teh same error.

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  • MOSS Content Query Web part itemstyle.xsl

    - by nav
    Hi, I have a Content Query Webpart (CQWP) pulling the URL and title from a NewsLinks list. The CQWP uses the XSLT style LVIS.News.Links defined in ItemStyle.xsl. I need to sort the title @Title0 field as commented out below because it causes an error. Does anyone know whats causing this error? - Many Thanks. The XSLT code is below: <xsl:template name="LVIS.News.Links" match="Row[@Style='LVIS.News.Links']" mode="itemstyle"> <xsl:param name="CurPos" /> <xsl:param name="Last" /> <xsl:variable name="SafeLinkUrl"> <xsl:call-template name="OuterTemplate.GetSafeLink"> <xsl:with-param name="UrlColumnName" select="'LinkUrl'"/> </xsl:call-template> </xsl:variable> <xsl:variable name="DisplayTitle"> <xsl:call-template name="OuterTemplate.GetTitle"> <xsl:with-param name="Title" select="@URL"/> <xsl:with-param name="UrlColumnName" select="'URL'"/> </xsl:call-template> </xsl:variable> <xsl:variable name="LinkTarget"> <xsl:if test="@OpenInNewWindow = 'True'" >_blank</xsl:if> </xsl:variable> <xsl:variable name="SafeImageUrl"> <xsl:call-template name="OuterTemplate.GetSafeStaticUrl"> <xsl:with-param name="UrlColumnName" select="'ImageUrl'"/> </xsl:call-template> </xsl:variable> <xsl:variable name="Header"> <xsl:if test="$CurPos = 1"> <![CDATA[<ul class="list_Links">]]> </xsl:if> </xsl:variable> <xsl:variable name="Footer"> <xsl:if test="$Last = $CurPos"> <![CDATA[</ul>]]> </xsl:if> </xsl:variable> <xsl:value-of select="$Header" disable-output-escaping="yes" /> <li> <a> <xsl:attribute name="href"> <xsl:value-of select="substring-before($DisplayTitle,', ')"></xsl:value-of> </xsl:attribute> <xsl:attribute name="title"> <xsl:value-of select="@Description"/> </xsl:attribute> <!-- <xsl:sort select="@Title0"/> --> <xsl:value-of select="@Title0"> </xsl:value-of> </a> </li> <xsl:value-of select="$Footer" disable-output-escaping="yes" /> </xsl:template>

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  • INSERT INTO in MS Access 2010 SOMETIMES GETS ERROR: 3073 Operation must use an updateable query

    - by Gary
    I get the ERROR: 3073 Operation must use an updateable query SOMETIMES, while performing an INSERT statment. I have no problem on my windows 7 PC, but the person I am writing this for sometimes gets the error. She also has MS Access 2010 on Windows 7. As I said I have never got it on my PC, and she only gets it sometimes. The code will insert a number of rows and then through the error, and other times not through the erro at all. The error occurs if I have the code and data in one .mdb file or seperate files. Here a snippet of code: OrderHdrInsertStmnt = " INSERT INTO ORDER_HDR " _ & "(ORDER_ID, SOURCE_CODE, ORDER_DATE, SHIP_FNAME, SHIP_LNAME, SHIP_EMAIL, SHIP_COMP, SHIP_PHONE, SHIP_ADDR, SHIP_CITY, SHIP_STATE, SHIP_ZIP, SHIP_CNTRY, " _ & " BILL_FNAME, BILL_LNAME, BILL_EMAIL, BILL_COMP, BILL_PHONE, BILL_ADDR, BILL_CITY, BILL_STATE, BILL_ZIP, BILL_CNTRY, " _ & " TAX, SHIPPING, TOTAL, MOD_DATE, INSERT_DATE) " _ & " VALUES (" _ & "'" & OrderId & "','" & SourceCode & "','" & Orderdate & "','" & ShipFName & "','" & ShipLName & "','" & ShipEmail & "','" & ShipComp & "','" & ShipPhone & "','" & ShipAddr & "','" & ShipCity & "','" & ShipState & "','" & ShipZip & "','" & ShipCntry _ & "','" & BillFName & "','" & BillLName & "','" & BillEmail & "','" & BillComp & "','" & BillPhone & "','" & BillAddr & "','" & BillCity & "','" & BillState & "','" & BillZip & "','" & BillCntry _ & "','" & OrderTax & "','" & OrderShipping & "','" & OrderTotal & "','" & ImportDate & "','" & ImportDate & "');" then I use dbsCurrent.Execute OrderHdrInsertStmnt, dbFailOnError Any assistance would be great!

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  • Neo4j increasing latency as SKIP increases on Cypher query + REST API

    - by voldomazta
    My setup: Java(TM) SE Runtime Environment (build 1.7.0_45-b18) Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode) Neo4j 2.0.0-M06 Enterprise First I made sure I warmed up the cache by executing the following: START n=node(*) RETURN COUNT(n); START r=relationship(*) RETURN count(r); The size of the table is 63,677 nodes and 7,169,995 relationships Now I have the following query: START u1=node:node_auto_index('uid:39') MATCH (u1:user)-[w:WANTS]->(c:card)<-[h:HAS]-(u2:user) WHERE u2.uid <> 39 WITH u2.uid AS uid, (CASE WHEN w.qty < h.qty THEN w.qty ELSE h.qty END) AS have RETURN uid, SUM(have) AS total ORDER BY total DESC SKIP 0 LIMIT 25 This UID has about 40k+ results that I want to be able to put a pagination to. The initial skip was around 773ms. I tried page 2 (skip 25) and the latency was around the same even up to page 500 it only rose up to 900ms so I didn't really bother. Now I tried some fast forward paging and jumped by thousands so I did 1000, then 2000, then 3000. I was hoping the ORDER BY arrangement will already have been cached by Neo4j and using SKIP will just move to that index in the result and wont have to iterate through each one again. But for each thousand skip I made the latency increased by alot. It's not just cache warming because for one I already warmed up the cache and two, I tried the same skip a couple of times for each skip and it yielded the same results: SKIP 0: 773ms SKIP 1000: 1369ms SKIP 2000: 2491ms SKIP 3000: 3899ms SKIP 4000: 5686ms SKIP 5000: 7424ms Now who the hell would want to view 5000 pages of results? 40k even?! :) Good point! I will probably put a cap on the maximum results a user can view but I was just curious about this phenomenon. Will somebody please explain why Neo4j seems to be re-iterating through stuff which appears to be already known to it? Here is my profiling for the 0 skip: ==> ColumnFilter(symKeys=["uid", " INTERNAL_AGGREGATE65c4d6a2-1930-4f32-8fd9-5e4399ce6f14"], returnItemNames=["uid", "total"], _rows=25, _db_hits=0) ==> Slice(skip="Literal(0)", _rows=25, _db_hits=0) ==> Top(orderBy=["SortItem(Cached( INTERNAL_AGGREGATE65c4d6a2-1930-4f32-8fd9-5e4399ce6f14 of type Any),false)"], limit="Add(Literal(0),Literal(25))", _rows=25, _db_hits=0) ==> EagerAggregation(keys=["uid"], aggregates=["( INTERNAL_AGGREGATE65c4d6a2-1930-4f32-8fd9-5e4399ce6f14,Sum(have))"], _rows=41659, _db_hits=0) ==> ColumnFilter(symKeys=["have", "u1", "uid", "c", "h", "w", "u2"], returnItemNames=["uid", "have"], _rows=146826, _db_hits=0) ==> Extract(symKeys=["u1", "c", "h", "w", "u2"], exprKeys=["uid", "have"], _rows=146826, _db_hits=587304) ==> Filter(pred="((NOT(Product(u2,uid(0),true) == Literal(39)) AND hasLabel(u1:user(0))) AND hasLabel(u2:user(0)))", _rows=146826, _db_hits=146826) ==> TraversalMatcher(trail="(u1)-[w:WANTS WHERE (hasLabel(NodeIdentifier():card(1)) AND hasLabel(NodeIdentifier():card(1))) AND true]->(c)<-[h:HAS WHERE (NOT(Product(NodeIdentifier(),uid(0),true) == Literal(39)) AND hasLabel(NodeIdentifier():user(0))) AND true]-(u2)", _rows=146826, _db_hits=293696) And for the 5000 skip: ==> ColumnFilter(symKeys=["uid", " INTERNAL_AGGREGATE99329ea5-03cd-4d53-a6bc-3ad554b47872"], returnItemNames=["uid", "total"], _rows=25, _db_hits=0) ==> Slice(skip="Literal(5000)", _rows=25, _db_hits=0) ==> Top(orderBy=["SortItem(Cached( INTERNAL_AGGREGATE99329ea5-03cd-4d53-a6bc-3ad554b47872 of type Any),false)"], limit="Add(Literal(5000),Literal(25))", _rows=5025, _db_hits=0) ==> EagerAggregation(keys=["uid"], aggregates=["( INTERNAL_AGGREGATE99329ea5-03cd-4d53-a6bc-3ad554b47872,Sum(have))"], _rows=41659, _db_hits=0) ==> ColumnFilter(symKeys=["have", "u1", "uid", "c", "h", "w", "u2"], returnItemNames=["uid", "have"], _rows=146826, _db_hits=0) ==> Extract(symKeys=["u1", "c", "h", "w", "u2"], exprKeys=["uid", "have"], _rows=146826, _db_hits=587304) ==> Filter(pred="((NOT(Product(u2,uid(0),true) == Literal(39)) AND hasLabel(u1:user(0))) AND hasLabel(u2:user(0)))", _rows=146826, _db_hits=146826) ==> TraversalMatcher(trail="(u1)-[w:WANTS WHERE (hasLabel(NodeIdentifier():card(1)) AND hasLabel(NodeIdentifier():card(1))) AND true]->(c)<-[h:HAS WHERE (NOT(Product(NodeIdentifier(),uid(0),true) == Literal(39)) AND hasLabel(NodeIdentifier():user(0))) AND true]-(u2)", _rows=146826, _db_hits=293696) The only difference is the LIMIT clause on the Top function. I hope we can make this work as intended, I really don't want to delve into doing an embedded Neo4j + my own Jetty REST API for the web app.

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  • MySQL query - if not exists - insert into - else - update

    - by user3180931
    I made a simple document generator by the form, this form saves everything to mysql database, It works great, but when someone type a the same 'nrumowy' it creates a new row in mysql, 'nrumowy' is unique, so when someone adds a form with the same 'nrumowy' I want to just update existing data in mysql, I have that code: $con=mysqli_connect("localhost","login","pass","database"); // Check connection if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); } // escape variables for security $numerklienta = mysqli_real_escape_string($con, $_POST['numerklienta']); $name = mysqli_real_escape_string($con, $_POST['name']); $hours = mysqli_real_escape_string($con, $_POST['hours']); $date = mysqli_real_escape_string($con, $_POST['date']); $beginDate = mysqli_real_escape_string($con, $_POST['beginDate']); $nrdomu = mysqli_real_escape_string($con, $_POST['nrdomu']); $telefon = mysqli_real_escape_string($con, $_POST['telefon']); $fax = mysqli_real_escape_string($con, $_POST['fax']); $nip = mysqli_real_escape_string($con, $_POST['nip']); $email = mysqli_real_escape_string($con, $_POST['email']); $stronawww = mysqli_real_escape_string($con, $_POST['stronawww']); $branza = mysqli_real_escape_string($con, $_POST['branza']); $vatkodpocztowy = mysqli_real_escape_string($con, $_POST['vatkodpocztowy']); $vatmiejscowosc = mysqli_real_escape_string($con, $_POST['vatmiejscowosc']); $vatulica = mysqli_real_escape_string($con, $_POST['vatulica']); $vatnrdomu = mysqli_real_escape_string($con, $_POST['vatnrdomu']); $vatemail = mysqli_real_escape_string($con, $_POST['vatemail']); $vatosoba = mysqli_real_escape_string($con, $_POST['vatosoba']); $datapublikacji = mysqli_real_escape_string($con, $_POST['datapublikacji']); $rabat = mysqli_real_escape_string($con, $_POST['rabat']); $wartoscnetto = mysqli_real_escape_string($con, $_POST['wartoscnetto']); $typreklamy = mysqli_real_escape_string($con, $_POST['typreklamy']); $inne = mysqli_real_escape_string($con, $_POST['inne']); $inne2 = mysqli_real_escape_string($con, $_POST['inne2']); $inne3 = mysqli_real_escape_string($con, $_POST['inne3']); $zaliczka = mysqli_real_escape_string($con, $_POST['zaliczka']); $liczbarat1 = mysqli_real_escape_string($con, $_POST['liczbarat1']); $zaakceptowaneprzez = mysqli_real_escape_string($con, $_POST['zaakceptowaneprzez']); $telzam = mysqli_real_escape_string($con, $_POST['telzam']); $datapodpis = mysqli_real_escape_string($con, $_POST['datapodpis']); $nrumowy = mysqli_real_escape_string($con, $_POST['nrumowy']); $sql="IF NOT EXISTS ( SELECT * FROM zam WHERE nrumowy = '$nrumowy' ) THEN INSERT INTO zam (numerklienta, name, hours, date, beginDate, nrdomu, telefon, fax, nip, email, stronawww, branza, vatkodpocztowy, vatmiejscowosc, vatulica, vatnrdomu, vatemail, vatosoba, datapublikacji, rabat, wartoscnetto, typreklamy, inne, inne2, inne3, zaliczka, liczbarat1, zaakceptowaneprzez, telzam, datapodpis, nrumowy) VALUES ('$numerklienta', '$name', '$hours', '$date', '$beginDate', '$nrdomu', '$telefon', '$fax', '$nip', '$email', '$stronawww', '$branza', '$vatkodpocztowy', '$vatmiejscowosc', '$vatulica', '$vatnrdomu', '$vatemail', '$vatosoba', '$datapublikacji', '$rabat', '$wartoscnetto', '$typreklamy', '$inne', '$inne2', '$inne3', '$zaliczka', '$liczbarat1', '$zaakceptowaneprzez', '$telzam', '$datapodpis', '$nrumowy' ) ELSE UPDATE zam SET name = '$name', numerklienta = '$numerklienta', hours = '$hours', date = '$date', beginDate = '$beginDate', nrdomu = '$nrdomu', telefon = '$telefon', fax = '$fax', nip = '$nip', email = '$email', stronawww = '$stronawww', branza = '$branza', vatkodpocztowy = '$vatkodpocztowy', vatmiejscowosc = '$vatmiejscowosc', vatulica = '$vatulica', vatnrdomu = '$vatnrdomu', vatemail = '$vatemail', vatosoba = '$vatosoba', datapublikacji = '$datapublikacji', rabat = '$rabat', wartoscnetto = '$wartoscnetto', typreklamy = '$typreklamy', inne = '$inne', inne2 = '$inne2', inne3 = '$inne3', zaliczka = '$zaliczka', liczbarat1 = '$liczbarat1', zaakceptowaneprzez = '$zaakceptowaneprzez', telzam = '$telzam', datapodpis = '$datapodpis' WHERE nrumowy ='$nrumowy' END IF"; if (!mysqli_query($con,$sql)) { die('Error: ' . mysqli_error($con)); } mysqli_close($con); This query without " select..... " and "else update" just a 'insert into' works great, also when I change this 'insert into' to 'update' but I don't know how to make this variable if not exists - insert into - else update

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  • MySQL query works in PHPMyAdmin but not PHP

    - by Su4p
    I do not understand what's happening. I have a query in PHP who crashes -with a strange error-. When I copy/paste the exact same request in PHPMyAdmin it works as expected. What am I doing wrong here ? SELECT oms_patient.id, oms_patient.date, oms_patient.date_modif, date_modif, AES_DECRYPT(nom,"xxxxx") AS "Nom", AES_DECRYPT(prenom,"xxxxx") AS "Prénom usuel", DATE_FORMAT(ddn, "%d/%m/%Y") AS "Date de naissance", villeNaissance AS "Lieu de naissance (ville)", CONCAT(oms_departement.libelle,"(",id_departement,")") AS "Lieu de vie", CONCAT(oms_pays.libelle,"(",id_pays,")") AS "Pays", CONCAT(patientsexe.libelle,"(",id_sexe,")") AS "Sexe", CONCAT(patientprofession.libelle,"(",id_profession,")") AS "Profession", IF(asthme>0,"Oui","Non") AS "Asthme", IF(rhinite>0,"Oui","Non") AS "Rhinite", IF(bcpo>0,"Oui","Non") AS "BPCO", IF(insuffisanceResp>0,"Oui","Non") AS "Insuffisance respiratoire chronique", IF(chirurgieOrl>0,"Oui","Non") AS "Chirurgie ORL du ronflement", IF(autreChirurgie>0,"Oui","Non") AS "Autre chirurgie ORL", IF(allergies>0,"Oui","Non") AS "Allergies", IF(OLD>0,"Oui","Non") AS "OLD", IF(hypertensionArterielle>0,"Oui","Non") AS "Hypertension artérielle", IF(infarctusMyocarde>0,"Oui","Non") AS "Infarctus du myocarde", IF(insuffisanceCoronaire>0,"Oui","Non") AS "Insuffisance coronaire", IF(troubleRythme>0,"Oui","Non") AS "Trouble du rythme", IF(accidentVasculaireCerebral>0,"Oui","Non") AS "Accident vasculaire cérébral", IF(insuffisanceCardiaque>0,"Oui","Non") AS "Insuffisance cardiaque", IF(arteriopathie>0,"Oui","Non") AS "Artériopathie", IF(tabagismeActuel>0,"Oui","Non") AS "Tabagisme actuel", CONCAT(nbPaquetsActuel," ","PA") AS "", IF(tabagismeAncien>0,"Oui","Non") AS "Tabagisme ancien", CONCAT(nbPaquetsAncien," ","PA") AS "", IF(alcool>0,"Oui","Non") AS "Alcool (conso régulière)", IF(refluxGastro>0,"Oui","Non") AS "Reflux gastro-oesophagien", IF(glaucome>0,"Oui","Non") AS "Glaucome", IF(diabete>0,"Oui","Non") AS "Diabète", CONCAT(patienttypeDiabete.libelle,"(",id_typeDiabete,")") AS "", IF(hypercholesterolemie>0,"Oui","Non") AS "Hypercholestérolémie", IF(hypertriglyceridemie>0,"Oui","Non") AS "Hypertriglycéridémie", IF(dysthyroidie>0,"Oui","Non") AS "Dysthyroïdie", IF(depression>0,"Oui","Non") AS "Dépression", IF(sedentarite>0,"Oui","Non") AS "Sédentarité", IF(syndromeDApneesSommeil>0,"Oui","Non") AS "SAS", IF(obesite>0,"Oui","Non") AS "Obésité", IF(dysmorphieFaciale>0,"Oui","Non") AS "Dysmorphie faciale", TextObservations AS "", id_user FROM oms_patient LEFT JOIN oms_departement ON oms_departement.id = id_departement LEFT JOIN oms_pays ON oms_pays.id = id_pays LEFT JOIN patientsexe ON patientsexe.id = id_sexe LEFT JOIN patientprofession ON patientprofession.id = id_profession LEFT JOIN patienttypeDiabete ON patienttypeDiabete.id = id_typeDiabete WHERE oms_patient.id=1 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'small"(conso régulière)", IF(refluxGastro0,"Oui","Non") as "Reflux ga' at line 1 "near 'small" <-- where is small o_O The PHP code isn't really relevant cause you won't see a lot. $db = mysql_connect(); mysql_select_db();//TODO SWITCH TO PDO mysql_query("SET NAMES UTF8"); $fields = $form->getFields($form); $settingsForm = $form->getSettings(); $sql = 'SELECT oms_patient.id,oms_patient.date,oms_patient.date_modif,'; foreach ($fields as $field) { if (!$field->isMultiSelect()) { $field->select_full(&$sql, 'oms_patient', null); } } if (isset($settingsForm['linkTo'])) { $idLinkTo = 'id_' . str_replace('oms_', '', $settingsForm['linkTo']); $sql .= $idLinkTo; } $sql.=' FROM oms_patient'; foreach ($fields as $field) { if (!$field->isMultiSelect() && $field->getTable('oms_patient')) { $sql .=' LEFT JOIN ' . $field->getTable('oms_patient') . ' ON ' . $field->getTable('oms_patient') . '.id = '.$field->getFieldName().' '; } } $sql.=' where oms_patient.id=' . $this->m_settings['e']; $result = mysql_query($sql) or die('Erreur SQL !<br>' . $sql . '<br>' . mysql_error()); $data = mysql_fetch_assoc($result); var_dump of $sql string(2663) "SELECT oms_patient.id,oms_patient.date,oms_patient.date_modif,date_modif,AES_DECRYPT(nom,"xxxxx") as "Nom",AES_DECRYPT("prenom","xxxxx") as "Prénom usuel",DATE_FORMAT(ddn, "%d/%m/%Y") as "Date de naissance",villeNaissance as "Lieu de naissance (ville)",CONCAT(oms_departement.libelle,"(",id_departement,")") as "Lieu de vie",CONCAT(oms_pays.libelle,"(",id_pays,")") as "Pays",CONCAT(patientsexe.libelle,"(",id_sexe,")") as "Sexe",CONCAT(patientprofession.libelle,"(",id_profession,")") as "Profession", IF"... can't go further to see what is in the output after the "..." <-- if you have an idea

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  • Errors with parameter datatype in PostgreSql query

    - by John
    Im trying to execute a query to postgresql using the following code. It's written in C/C++ and I keep getting the following error when declaring a cursor: DECLARE CURSOR failed: ERROR: could not determine data type of parameter $1 Searching on here and on google, I can't find a solution. Can anyone find where I have made and error and why this is happening? thanks! void searchdb( PGconn *conn, char* name, char* offset ) { // Will hold the number of field in table int nFields; // Start a transaction block PGresult *res = PQexec(conn, "BEGIN"); if (PQresultStatus(res) != PGRES_COMMAND_OK) { printf("BEGIN command failed: %s", PQerrorMessage(conn)); PQclear(res); exit_nicely(conn); } // Clear result PQclear(res); printf("BEGIN command - OK\n"); //set the values to use const char *values[3] = {(char*)name, (char*)RESULTS_LIMIT, (char*)offset}; //calculate the lengths of each of the values int lengths[3] = {strlen((char*)name), sizeof(RESULTS_LIMIT), sizeof(offset)}; //state which parameters are binary int binary[3] = {0, 0, 1}; res = PQexecParams(conn, "DECLARE emprec CURSOR for SELECT name, id, 'Events' as source FROM events_basic WHERE name LIKE '$1::varchar%' UNION ALL " " SELECT name, fsq_id, 'Venues' as source FROM venues_cache WHERE name LIKE '$1::varchar%' UNION ALL " " SELECT name, geo_id, 'Cities' as source FROM static_cities WHERE name LIKE '$1::varchar%' OR FIND_IN_SET('$1::varchar%', alternate_names) != 0 LIMIT $2::int4 OFFSET $3::int4", 3, //number of parameters NULL, //ignore the Oid field values, //values to substitute $1 and $2 lengths, //the lengths, in bytes, of each of the parameter values binary, //whether the values are binary or not 0); //we want the result in text format // Fetch rows from table if (PQresultStatus(res) != PGRES_COMMAND_OK) { printf("DECLARE CURSOR failed: %s", PQerrorMessage(conn)); PQclear(res); exit_nicely(conn); } // Clear result PQclear(res); res = PQexec(conn, "FETCH ALL in emprec"); if (PQresultStatus(res) != PGRES_TUPLES_OK) { printf("FETCH ALL failed"); PQclear(res); exit_nicely(conn); } // Get the field name nFields = PQnfields(res); // Prepare the header with table field name printf("\nFetch record:"); printf("\n********************************************************************\n"); for (int i = 0; i < nFields; i++) printf("%-30s", PQfname(res, i)); printf("\n********************************************************************\n"); // Next, print out the record for each row for (int i = 0; i < PQntuples(res); i++) { for (int j = 0; j < nFields; j++) printf("%-30s", PQgetvalue(res, i, j)); printf("\n"); } PQclear(res); // Close the emprec res = PQexec(conn, "CLOSE emprec"); PQclear(res); // End the transaction res = PQexec(conn, "END"); // Clear result PQclear(res); }

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  • Setting up Django on an internal server (os.environ() not working as expected?)

    - by monkut
    I'm trying to setup Django on an internal company server. (No external connection to the Internet.) Looking over the server setup documentation it appears that the "Running Django on a shared-hosting provider with Apache" method seems to be the most-likely to work in this situation. Here's the server information: Can't install mod_python no root access Server is SunOs 5.6 Python 2.5 Apache/2.0.46 I've installed Django (and flup) using the --prefix option (reading again I probably should've used --home, but at the moment it doesn't seem to matter) I've added the .htaccess file and mysite.fcgi file to my root web directory as mentioned here. When I run the mysite.fcgi script from the server I get my expected output (the correct site HTML output). But, it won't when trying to access it from a browser. It seems that it may be a problem with the PYTHONPATH setting since I'm using the prefix option. I've noticed that if I run mysite.fcgi from the command-line without setting the PYTHONPATH enviornment variable it throws the following error: prompt$ python2.5 mysite.fcgi ERROR: No module named flup Unable to load the flup package. In order to run django as a FastCGI application, you will need to get flup from http://www.saddi.com/software/flup/ If you've already installed flup, then make sure you have it in your PYTHONPATH. I've added sys.path.append(prefixpath) and os.environ['PYTHONPATH'] = prefixpath to mysite.fcgi, but if I set the enviornment variable to be empty on the command-line then run mysite.fcgi, I still get the above error. Here are some command-line results: >>> os.environ['PYTHONPATH'] = 'Null' >>> >>> os.system('echo $PYTHONPATH') Null >>> os.environ['PYTHONPATH'] = '/prefix/path' >>> >>> os.system('echo $PYTHONPATH') /prefix/path >>> exit() prompt$ echo $PYTHONPATH Null It looks like Python is setting the variable OK, but the variable is only applicable inside of the script. Flup appears to be distributed as an .egg file, and my guess is that the egg implementation doesn't take into account variables added by os.environ['key'] = value (?) at least when installing via the --prefix option. I'm not that familiar with .pth files, but it seems that the easy-install.pth file is the one that points to flup: import sys; sys.__plen = len(sys.path) ./setuptools-0.6c6-py2.5.egg ./flup-1.0.1-py2.5.egg import sys; new=sys.path[sys.__plen:]; del sys.path[sys.__plen:]; p=getattr(sys,'__egginsert',0); sy s.path[p:p]=new; sys.__egginsert = p+len(new) It looks like it's doing something funky, anyway to edit this or add something to my code so it will find flup?

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  • will mmap use user cpu instead of whole sys cpu? (solaris)

    - by Daniel
    when use mmap to allocate some anonymous mem, we often set the start address as 0/null so mmap will figure out the starting address by itself. And to get the start address, it will work thought the whole virtual memory space to find a hole which could put the chuck of mem to be allocated. I guess this is calculated as user cpu instead of sys cpu. If the virtual memory is fragmented, then the time to find the starting address will use more user cpu, is my understanding correct

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  • How to put Listview items into String Array?

    - by user2851687
    Im developing an app and as the title says how to put items of listview into String array, not string array to listview but listview to string array. I've been searching for this but what I only found is putting String array items into listview. Please help me thank you in advance. To clarify this thread, the question is how to put listview items into String array. Thanks. :D Codes public class DailyPlanTab extends Activity implements OnItemClickListener { ListView dailyPlanList; ArrayList<DailyManager> taskList = new ArrayList<DailyManager>(); DatabaseDailyPlan db; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.dailyplan_layout); dailyPlanList = (ListView) findViewById(R.id.lvDailyPlanList); dailyPlanList.setOnItemClickListener(this); ImageView add = (ImageView) findViewById(R.id.ivDailyPlanAdd); add.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Intent newDailyIntent = new Intent(getApplicationContext(), NewDailyPlan.class); startActivity(newDailyIntent); } }); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); taskList.clear(); db = new DatabaseDailyPlan(getApplicationContext()); db.getWritableDatabase(); ArrayList<DailyManager> tempList = db.getTask(); for (int i = 0; i < tempList.size(); i++) { String getTask = tempList.get(i).getDaily_name(); String getDate = tempList.get(i).getDaily_date(); int getId = tempList.get(i).getDaily_id(); DailyManager dm = new DailyManager(); dm.setDaily_name(getTask); dm.setDaily_date(getDate); dm.setDaily_id(getId); taskList.add(dm); } dailyPlanList.setAdapter(new ListAdapter(this)); // db.close(); } public class ListAdapter extends BaseAdapter { LayoutInflater inflater; ViewHolder viewHolder; public ListAdapter(Context c) { // TODO Auto-generated constructor stub inflater = LayoutInflater.from(c); } @Override public int getCount() { // TODO Auto-generated method stub return taskList.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return position; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if (convertView == null) { convertView = inflater.inflate(R.layout.row_checklist_item, null); viewHolder = new ViewHolder(); viewHolder.taskTitle = (TextView) convertView .findViewById(R.id.tvCheckListItem); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } viewHolder.taskTitle.setText("" + taskList.get(position).getDaily_name()); return convertView; } } public class ViewHolder { TextView taskTitle, taskDate; } @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { // TODO Auto-generated method stub int taskId = taskList.get(position).getDaily_id(); String taskName = taskList.get(position).getDaily_name(); String taskDate = taskList.get(position).getDaily_date(); Intent newPlan = new Intent(getApplicationContext(), DailyPlan.class); newPlan.putExtra("task_id", taskId); newPlan.putExtra("task_name", taskName); startActivity(newPlan); } next is the information of the item inside the listview public class DailyPlan extends Activity implements OnItemClickListener { final ArrayList<DailyManager> savedItems = new ArrayList<DailyManager>(); ListView checkList; Boolean nextItem = false; TempManager tm; DatabaseTemp dbTemp; Intent i; int taskId = -1; String taskName = " ", taskDate = null; DatabaseDailyPlan db; DailyManager dm; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.saved_dailyplan); checkList = (ListView) findViewById(R.id.lvCheckList); // checkList.setOnItemClickListener(this); try { i = getIntent(); taskId = i.getExtras().getInt("task_id"); taskName = i.getExtras().getString("task_name"); Toast.makeText(getApplicationContext(), "From new id is" + taskId, 5000).show(); } catch (Exception e) { } Button addList = (Button) findViewById(R.id.bAddList); addList.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub // openDialog("", false, -1); } }); if (nextItem) { // openDialog("", false, -1); } } public void refresh() { DailyPlan.this.onResume(); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); savedItems.clear(); dbTemp = new DatabaseTemp(getApplicationContext()); dbTemp.getWritableDatabase(); db = new DatabaseDailyPlan(getApplicationContext()); db.getWritableDatabase(); if (taskId != -1) { // / For Load ArrayList<DailyManager> savedList = db.getList(taskId); for (int i = 0; i < savedList.size(); i++) { String savedListItems = savedList.get(i).getDaily_list(); String savedListTitle = savedList.get(i).getDaily_name(); String savedListDate = savedList.get(i).getDaily_date(); int savedListId = savedList.get(i).getDaily_id(); DailyManager dm = new DailyManager(); dm.setDaily_list(savedListItems); dm.setDaily_name(savedListTitle); dm.setDaily_date(savedListDate); dm.setDaily_id(savedListId); savedItems.add(dm); } } else { // / For New } checkList.setAdapter(new ListAdapter(this)); } public class ListAdapter extends BaseAdapter { LayoutInflater inflater; ViewHolder viewHolder; public ListAdapter(Context c) { // TODO Auto-generated constructor stub inflater = LayoutInflater.from(c); } @Override public int getCount() { // TODO Auto-generated method stub return savedItems.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return position; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub if (convertView == null) { convertView = inflater.inflate(R.layout.row_checklist_item, null); viewHolder = new ViewHolder(); viewHolder.checkListItem = (TextView) convertView .findViewById(R.id.tvCheckListItem); convertView.setTag(viewHolder); } else { viewHolder = (ViewHolder) convertView.getTag(); } viewHolder.checkListItem.setText(savedItems.get(position) .getDaily_list() + position); final int temp = position; return convertView; } } private class ViewHolder { TextView checkListItem; } @Override public void onItemClick(AdapterView<?> arg0, View arg1, int item, long arg3) { // TODO Auto-generated method stub // openDialog(savedItems.get(item).getDaily_name(), true, // savedItems.get(item).getDaily_id()); } }

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  • In python beyond 'exec string' is there a way to 'import' using the db as a filesystem

    - by molicule
    Although it does not seem possible, I wanted to put this out there to see if others had some innovative solutions to 'dynamically loading and executing code in python' So if one saved code in a database, one could read it and 'exec it', however if one wanted to use it in a similar fashion to the filesystem, one would need to 'save and load the compiled .pyc' create an 'import dbimp' ala 'import imp' etc. any pointers? ideas? thoughts?

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  • Django: How do I use assert False, sys.exc_info()[0] without showing a system error page?

    - by swisstony
    I'm new to Django and have some code in my views.py like this: try: myfunction() except: assert False, sys.exc_info()[0] This is very helpful because I get an email with lots of useful info if there's an error. The problem is that it also redirects the user to a Webfaction system error page. What I'd like to know is how do I still get the useful error email, but redirect the user to my own error page? Also, is this the best way to be handling errors in Django?

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  • ephemeral vs EBS partitions

    - by hortitude
    I launched an EBS backed AMI with all the defaults. I noticed that it automicatlly had attached an ephemeral disk. I was just wondering if there was a good programtic way to know that this particular device is ephemeral vs some EBS volume I had decided to attach: ubuntu@-----:~$ df -ahT Filesystem Type Size Used Avail Use% Mounted on /dev/xvda1 ext4 7.9G 867M 6.7G 12% / proc proc 0 0 0 - /proc sysfs sysfs 0 0 0 - /sys none fusectl 0 0 0 - /sys/fs/fuse/connections none debugfs 0 0 0 - /sys/kernel/debug none securityfs 0 0 0 - /sys/kernel/security udev devtmpfs 1.9G 12K 1.9G 1% /dev devpts devpts 0 0 0 - /dev/pts tmpfs tmpfs 751M 172K 750M 1% /run none tmpfs 5.0M 0 5.0M 0% /run/lock none tmpfs 1.9G 0 1.9G 0% /run/shm /dev/xvdb ext3 394G 199M 374G 1% /mnt ubuntu@-----:~$ mount /dev/xvda1 on / type ext4 (rw) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) /dev/xvdb on /mnt type ext3 (rw,_netdev)

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  • What are the types and inner workings of a query optimizer?

    - by Frank Developer
    As I understand it, most query optimizers are cost-based. Some can be influenced by hints like FIRST_ROWS(). Others are tailored for OLAP. Is it possible to know more detailed logic about how Informix IDS and SE's optimizers decide what's the best route for processing a query, other than SET EXPLAIN? Is there any documentation which illustrates the ranking of SELECT statements? I would imagine that "SELECT col FROM table WHERE ROWID = n" ranks 1st. What are the rest of them?.. If I'm not mistaking, Informix's ROWID is a SERIAL(INT) which allows for a max. of 2GB nrows, or maybe it uses INT9 for TB's nrows?.. However, I think Oracle uses HEX values for ROWID. Too bad ROWID can't be oftenly used, since a rows ROWID can change. So maybe ROWID is used by the optimizer as a counter? Perhaps, it could be used for implementing the query progress idea I mentioned in my "Begin viewing query results before query completes" question? For some reason, I feel it wouldn't be that difficult to report a query's progress while being processed, perhaps at the expense of some slight overhead, but it would be nice to know ahead of time: A "Google-like" estimate of how many rows meet a query's criteria, display it's progress every 100, 200, 500 or 1,000 rows, give users the ability to cancel it at anytime and start displaying the qualifying rows as they are being put into the current list, while it continues searching?.. This is just one example, perhaps we could think other neat/useful features, the ingridients are more or less there. Perhaps we could fine-tune each query with more granularity than currently available? OLTP queries tend to be mostly static and pre-defined. The "what-if's" are more OLAP, so let's try to add more control and intelligence to it? So, therefore, being able to more precisely control, not "hint-influence" a query is what's needed and therefore it would be necessary to know how the optimizers logic is programmed. We can then have Dynamic SELECT and other statements for specific situations! Maybe even tell IDS to read blocks of indexes nodes at-a-time instead of one-by-one, etc. etc.

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  • Is there a more expressive way of executing SQL query using Qt?

    - by ShaChris23
    I currently have this code: // Construct query QString const statement = QString("drop database if exists %1") .arg(databaseName_); QSqlQuery query(db); query.exec(statement); Is there a better way to code than the above? Specifically, I dont like how I use QString for SQL statement. It'd be nice if Qt has some class so that I could do something like: // Construct query QSomeClass statement = "drop database if exists %1"; statement.setArg(1, databaseName_); // Replace all %1 in the original string. QSqlQuery query(db); query.exec(statement);

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  • Model of hql query firing at back end by hql engine?

    - by Maddy.Shik
    I want to understand how hibernate execute hql query internally or in other models how hql query engine works. Please suggest some good links for same? One of reason for reading is following problem. Class Branch { //lazy loaded @joincolumn(name="company_id") Company company; } Since company is heavy object so it is lazy loaded. now i have hql query "from Branch as branch where branch.Company.id=:companyId" my concern is that if for firing above query, hql engine has to retrieve company object then its a performance hit and i would prefer to add one more property in Branch class i.e. companyId. So in this case hql query would be "from Branch as branch where branch.companyId=:companyId" If hql engine first generate sql from hql followed by firing of sql query itself, then there should be no performance issue. Please let me know if problem is not understandable.

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  • Is there a way to customise messages produced by statements in MS SQL Query Analyzer?

    - by Scott Leis
    If I run a simple query in SQL Query Analyzer, like: SELECT * FROM TableName the Messages pane always produces a message like: (30 row(s) affected) If I run a stored procedure with many statements, the messages are useless because there's no indication of what each one relates to. So firstly: Is there a way to customise the default messages on a per-query basis? E.g. I'd like a specific query to produce a message like: TableName query produced [numRowsAffected] results. replacing [numRowsAffected] with the number that would have appeared in the default message. Secondly, is there a way to suppress the default messages on a per-query basis? E.g. I have a local variable of type TABLE, used in several statements. I don't want any message to appear for statements where I'm just deleting data from that variable before re-using it. I'm seeking solutions that work in SQL Server 8.0.

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  • Is there a limitation to the length of the query in mysql?

    - by Bakhtiyor
    I am asking this question because I need to know this limitation as I am generating SELECT query in my PHP script and the part of WHERE in this query is generated inside the loop. Precisely it looks like this $query="SELECT field_names FROM table_name WHERE "; $condition="metadata like \"%$uol_metadata_arr[0]%\" "; for($i=1; $i<count($uol_metadata_arr); $i++){ $condition.=" OR metadata like \"%$uol_metadata_arr[$i]%\" "; } $query.=$condition; $result=mysql_query($query); So, that's why I need to know how long my $query string can be, because the array *$uol_metadata_arr* could contain many items.

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  • What's this error messages mean?

    - by flybirdtt
    03-20 11:41:28.103: ERROR/vold(550): Error opening switch name path '/sys/class/switch/test2' (No such file or directory) 03-20 11:41:28.103: ERROR/vold(550): Error bootstrapping switch '/sys/class/switch/test2' (m) 03-20 11:41:28.103: ERROR/vold(550): Error opening switch name path '/sys/class/switch/test' (No such file or directory) 03-20 11:41:28.103: ERROR/vold(550): Error bootstrapping switch '/sys/class/switch/test' (m) 03-20 11:41:28.153: ERROR/flash_image(557): can't find recovery partition 03-20 11:41:51.493: ERROR/MemoryHeapBase(585): error opening /dev/pmem: No such file or directory 03-20 11:41:51.503: ERROR/SurfaceFlinger(585): Couldn't open /sys/power/wait_for_fb_sleep or /sys/power/wait_for_fb_wake 03-20 11:41:51.572: ERROR/GLLogger(585): couldn't load library (Cannot find library) 03-20 11:41:52.144: ERROR/GLLogger(585): couldn't load library (Cannot find library) 03-20 11:41:59.913: ERROR/BatteryService(585): Could not open '/sys/class/power_supply/usb/online' 03-20 11:41:59.923: ERROR/BatteryService(585): Could not open '/sys/class/power_supply/battery/batt_vol' 03-20 11:41:59.943: ERROR/BatteryService(585): Could not open '/sys/class/power_supply/battery/batt_temp' 03-20 11:42:00.532: ERROR/EventHub(585): could not get driver version for /dev/input/mouse0, Not a typewriter 03-20 11:42:00.563: ERROR/EventHub(585): could not get driver version for /dev/input/mice, Not a typewriter 03-20 11:42:00.793: ERROR/System(585): Failure starting core service 03-20 11:42:00.793: ERROR/System(585): java.lang.SecurityException 03-20 11:42:00.793: ERROR/System(585): at android.os.BinderProxy.transact(Native Method) 03-20 11:42:00.793: ERROR/System(585): at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java:146) 03-20 11:42:00.793: ERROR/System(585): at android.os.ServiceManager.addService(ServiceManager.java:72) 03-20 11:42:00.793: ERROR/System(585): at com.android.server.ServerThread.run(SystemServer.java:163) 03-20 11:42:00.823: ERROR/AndroidRuntime(585): Crash logging skipped, no checkin service 03-20 11:42:02.993: ERROR/LockPatternKeyguardView(585): Failed to bind to GLS while checking for account 03-20 11:42:10.204: ERROR/ApplicationContext(585): Couldn't create directory for SharedPreferences file shared_prefs/wallpaper-hints.xml 03-20 11:42:11.539: ERROR/ActivityThread(624): Failed to find provider info for android.server.checkin 03-20 11:42:12.889: ERROR/ActivityThread(624): Failed to find provider info for android.server.checkin 03-20 11:42:13.048: ERROR/ActivityThread(624): Failed to find provider info for android.server.checkin

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  • Ajax inside Button Click (Getting parameter / Asp.NET MVC)

    - by Ph.E
    Greetings gentlemen I'm trying to implement the following code in my View, and unfortunately I'm not getting. The event is called, but I can not receive the parameter. Does anyone have any ideas? Method: <p><%= Html.AjaxButtonLink("btnExcluir","btnExcluir","Excluir", null, Url.Action("Excluir", new { IdMenu = Model.MenuInfo.Id_menu })) %></p> HTML: <p><input id="btnExcluir" name="btnExcluir" onClick="Sys.Mvc.AsyncHyperlink.handleClick(&quot;/Gerencial/MENUACAO/Excluir/60?IdMenu=60&quot;, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, httpMethod: 'Post' });" type="button" value="Excluir"></input></p> Controller: [ AcceptVerbs(HttpVerbs.Post) ] public ActionResult Excluir(string IdMenu) string IdMenu always come null! ================ Differences ActionLink: <p><a href="/Gerencial/MenuAcao/Excluir/60?IdMenu=60" onclick="Sys.Mvc.AsyncHyperlink.handleClick(this, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, httpMethod: 'Post' });">Excluir</a></p> My Button: <p><input id="btnExcluir" name="btnExcluir" onClick="Sys.Mvc.AsyncHyperlink.handleClick(&quot;/Gerencial/MENUACAO/Excluir/60?IdMenu=60&quot;, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, httpMethod: 'Post' });" type="button" value="Excluir"></input></p> Thanks

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  • PHP rewrite to included file - is this a valid script?

    - by Poni
    Hi all! I've made this question: http://stackoverflow.com/questions/2921469/php-mutual-exclusion-mutex As said there, I want several sources to send their stats once in a while, and these stats will be showed at the website's main page. My problem is that I want this to be done in an atomic manner, so no update of the stats will overlap another one running in the background. Now, I came up with this solution and I want you PHP experts to judge it. stats.php <?php define("my_counter", 12); ?> index.php <?php include "stats.php"; echo constant("my_counter"); ?> update.php <?php $old_error_reporting = error_reporting(0); include "stats.php"; define("my_stats_template",' <?php define("my_counter", %d); ?> '); $fd = fopen("stats.php", "w+"); if($fd) { if (flock($fd, LOCK_EX)) { $my_counter = 0; try { $my_counter = constant("my_counter"); } catch(Exception $e) { } $my_counter++; $new_stats = sprintf(constant("my_stats_template"), $my_counter); echo "Counter should stand at $my_counter"; fwrite($fd, $new_stats); } flock($fd, LOCK_UN); fclose($fd); } error_reporting($old_error_reporting); ?> Several clients will call the "update.php" file once every 60sec each. The "index.php" is going to use the "stats.php" file all the time as you can see. What's your opinion?

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  • programs hangs during socket interaction

    - by herrturtur
    I have two programs, sendfile.py and recvfile.py that are supposed to interact to send a file across the network. They communicate over TCP sockets. The communication is supposed to go something like this: sender =====filename=====> receiver sender <===== 'ok' ======= receiver or sender <===== 'no' ======= receiver if ok: sender ====== file ======> receiver I've got The sender and receiver code is here: Sender: import sys from jmm_sockets import * if len(sys.argv) != 4: print "Usage:", sys.argv[0], "<host> <port> <filename>" sys.exit(1) s = getClientSocket(sys.argv[1], int(sys.argv[2])) try: f = open(sys.argv[3]) except IOError, msg: print "couldn't open file" sys.exit(1) # send filename s.send(sys.argv[3]) # receive 'ok' buffer = None response = str() while 1: buffer = s.recv(1) if buffer == '': break else: response = response + buffer if response == 'ok': print 'receiver acknowledged receipt of filename' # send file s.send(f.read()) elif response == 'no': print "receiver doesn't want the file" # cleanup f.close() s.close() Receiver: from jmm_sockets import * s = getServerSocket(None, 16001) conn, addr = s.accept() buffer = None filename = str() # receive filename while 1: buffer = conn.recv(1) if buffer == '': break else: filename = filename + buffer print "sender wants to send", filename, "is that ok?" user_choice = raw_input("ok/no: ") if user_choice == 'ok': # send ok conn.send('ok') #receive file data = str() while 1: buffer = conn.recv(1) if buffer=='': break else: data = data + buffer print data else: conn.send('no') conn.close() I'm sure I'm missing something here in the sorts of a deadlock, but don't know what it is.

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  • PHP rewrite an included file - is this a valid script?

    - by Poni
    Hi all! I've made this question: http://stackoverflow.com/questions/2921469/php-mutual-exclusion-mutex As said there, I want several sources to send their stats once in a while, and these stats will be showed at the website's main page. My problem is that I want this to be done in an atomic manner, so no update of the stats will overlap another one running in the background. Now, I came up with this solution and I want you PHP experts to judge it. stats.php <?php define("my_counter", 12); ?> index.php <?php include "stats.php"; echo constant("my_counter"); ?> update.php <?php $old_error_reporting = error_reporting(0); include "stats.php"; define("my_stats_template",' <?php define("my_counter", %d); ?> '); $fd = fopen("stats.php", "w+"); if($fd) { if (flock($fd, LOCK_EX)) { $my_counter = 0; try { $my_counter = constant("my_counter"); } catch(Exception $e) { } $my_counter++; $new_stats = sprintf(constant("my_stats_template"), $my_counter); echo "Counter should stand at $my_counter"; fwrite($fd, $new_stats); } flock($fd, LOCK_UN); fclose($fd); } error_reporting($old_error_reporting); ?> Several clients will call the "update.php" file once every 60sec each. The "index.php" is going to use the "stats.php" file all the time as you can see. What's your opinion?

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