java,hibernateRelated issues-Collection of common programming errors
After Sandy
java time
Following a bug, I’ve noticed that if I create a java.sql.Timestamp from a java.util.Date, using the constructor that takes the milliseconds, the Date instance is always after() the Timestamp. This is puzzling, since (a) the contract for before() specifies a strict comparison and (b) if not equal, the Timestamp, because it has nanoseconds, might itself be after() the Date. But the results are opposite and repeatable (with JDK 1.6 and 1.7, with different JVM timezones). Comparing two Dates works
NimChimpsky
java mysql hibernate
Its adds new ones, but as far as I can see it does not drop the old ones ?When I say old ones, I mean properties of entity objects that are now completely removed,where previously they were present and annotated with @columnAre my only options to drop the col manually or change the config value to create ? Neither of which are particularly charming.Or something else ?
Gruck
java sqlite jdbc native
I currently am working on a quite simple projet using Java web app hosted in Weblogic and an SQLite DB. (Scope quite small, two tables only)Developpement went fine and still works, but when deploying to staging, i got some unexpected prolem.Whenever the app has to read (select) from the DB, i can read the following stack trace : Root cause of ServletException.java.lang.Error: in _syscall()at org.ibex.nestedvm.Runtime.syscall(Runtime.java:1086)at org.sqlite.SQLite.run_0x171800(target/build/SQLit
Jack Mszczynski
java mysql sql postgresql jdbc
I am wondering what are the differences and when to use: – Statement, – PreparedStatement, – CallableStatement in JDBC. Can You give me best practice and typical scenario of using each of these?Also – how can I enable and use caching in JDBC?
hofmeister
java multithreading
This question already has an answer here:Why must wait() always be in synchronized block5 answersI have two Java classespublic class Firstclass {public static void main(String args[]) throws InterruptedException{System.out.println(“Main start….”);Secondclass s=new Secondclass();Thread t1 = new Thread(s);t1.setName(“First Thread”);Thread t2=new Thread(s);t2.setName(“Second Thread”);t1.start();t2.start();System.out.println(“Main close…”); } }andpublic class Secondclass implements Run
S E
java debugging exception-handling jvm
So I recently wrote a java class that extends exception and used an instance of this class to check cases and throw itself if an error occurs. I found out that when the caller of main catches this exception, the line it says the exception was thrown from is the line from where the exception was created, and not from where it was thrown. I’m just wondering why this is, and whether it is intended behavior for the jvm or not since this is not a common way of throwing exceptions. If it is intended b
ruslan
java gwt requestfactory
Could you tel me please what my problem is? I have GWT RequestContext with some methods in it and some service class with that methods implementation. When I run in Dev mode my RequestContext object doesn’t pass validation.Here is the RequestContext interface: @Service(value = CorporateAccountService.class, locator = CorporateAccountServiceLocator.class)public interface CorporateAccountServiceRequest extends RequestContext {Request<List<CorporateAccountProxy>> findAllCorporateAccount
george mano
java exception-handling
I want to delete the exception handler from this code because I dont understand the reason it is there, and I believe it does not do anything in the stage of my code. I have this:public void ToFile(){try{PrintWriter pw = new PrintWriter(new FileWriter(file, false));for (String st:stringarray){ pw.println(st);pw.close();}}catch(Exception exception){}}When I delete the exception part, I transform it into this, but it gives me error…:public void ToFile(){PrintWriter pw = new PrintWriter();for (S
FollowTheMedia
java corba jacorb nameservice
I’ve got a problem with JacORB 3.2 as it seems that it doesn’t read the orb.properties file, and especially the ORBInitRef.NameService property.As stated in the documentation on chapter 3.1, JacORB automatically searches for the orb.properties file in three locations: the “java.home”/lib directory, the “user.home” directory and inside the classpath.This is the evidence that I’m not totally drunk:Java command:System.out.println(System.getProperty(“java.home”)); System.out.println(System.getProper
Blckknght
java android soap wsdl ksoap
I am consuming a .net web service using ksoap2 but getting the following Exception:org.xmlpull.v1.XmlPullParserException: unexpected type (position:END_DOCUMENT null@1:1 in java.io.InputStreamReader@412caa08)`My request dump is the same as I needed but I’m not getting response dump and it has come as null. I am trying, but getting the same error.Please some one help me. My code is given below-public class Login extends Activity {private final String NAMESPACE = “http://xyz.public/imageupload/1.0
NimChimpsky
java mysql hibernate
Its adds new ones, but as far as I can see it does not drop the old ones ?When I say old ones, I mean properties of entity objects that are now completely removed,where previously they were present and annotated with @columnAre my only options to drop the col manually or change the config value to create ? Neither of which are particularly charming.Or something else ?
Konsumierer
hibernate hql dialect
I´m giving up and ask the community …In my project, I´m using Hibernate 3.6.4.Final and a custom sql dialect:public class ServiceAppMySQL5InnoDBDialect extends MySQL5InnoDBDialect {public ServiceAppMySQL5InnoDBDialect() {super();registerFunction(“bitwise_and”, new SQLFunctionTemplate(StandardBasicTypes.INTEGER, “(?1 & ?2)”));registerFunction(“hasflags”, new SQLFunctionTemplate(StandardBasicTypes.BOOLEAN, “?1 & ?2 = ?2”));}}Using the hasflags method in a HQL query fails. Here is the que
musubi
java hibernate jpa playframework-2.0
I have a Play Framework application and I was using Hibernate 4.2.5.Final (which is retrieved via the Maven dependency manager). I decided to upgrade to Hibernate 4.3.0.Final, recompile my application successfully, and ran it.I got the exception below, and haven’t been able to figure out why. I downgraded back to 4.2.5 and this issue did not occur. I then, tried upgrading Hibernate with each Final release after 4.2.5. That is, I went from 4.2.5.Final to 4.2.6.Final to 4.2.7.Final to 4.2.8.Fi
Pascal Thivent
java hibernate orm
i have relationship:// In A.java class @OneToMany(mappedBy=”a”, fetch=FetchType.LAZY) @Cascade(CascadeType.SAVE_UPDATE) private List<B> bList;// In B.java class @ManyToOne(fetch=FetchType.LAZY) @JoinColumn(name=”id_a”) @Cascade(CascadeType.SAVE_UPDATE) private A a;Now look this:A a=new A(); // setting AB b=new B(); // setting B b.setA(a);session.save(b); // this save b and a obviouslyNow the “problem”:a.getId() -> current new id OK a.getBList() -> still null…So, why bList is not update i
Tomasz Nurkiewicz
java spring hibernate
We had Spring2 jar files in application. Upgraded all the Jar files to latest release and started seeing the following error message. Checked my Buildpath and classpath, cannot find anything from there. following is my spring-context.xml. xsd versions were 2.5 previously, I changes all the xsd versions to 3.0 (Depending on the latest version 3.0 and 2.3 for spring-webflow). attached my stacktrace. Any help is greatly appreciated!<?xml version=”1.0″ encoding=”UTF-8″?> <beans xmlns=”http:
LStrike
hibernate java-ee-6 hibernate-search
I have a problem to recreate a full index with hibernate search for a big datatable with about 45000 entries.I what way do I have to modify the following code?@Transactionalpublic void rebuildIndex(){logDebug(“Start rebuilding full index”);FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);try {fullTextEntityManager.createIndexer().startAndWait();logDebug(“Finished rebuilding full index”);} catch (InterruptedException e) {// TODO Auto-generated catch blo
vijay.shad
hibernate hql
I am trying to query hibernate for given scenario:My Data ModelClass Communication:variables : subject, sentTo, creator.Now lets say there are some notes exchanged between usera and userb. I want to find all those notes by a hibernate query. I have written below my query string.select note from Communication n where n.subject=:subject and ((n.sentTo=:sentto and n.creator=:creator) or (n.sentTo:creator and n.creator=:sentto))But hibernate is not able to parse this query. Please suggest what to do
Sergey Mikhanov
java database hibernate postgresql jdbc
I am setting up a project using Hibernate 3.3.1 GA and PostgreSQL 8.3. I’ve just created a database, the first table, added one row there and now configuring Hibernate.However, even the simplest query:Criteria criteria = session.createCriteria(Place.class); List result = criteria.list();could not be executed (empty list is returned though there is one record in the database). I looked to the PostgreSQL logs and could see:2008-09-17 22:52:59 CEST LOG: connection received: host=192.168.175.1 port
Soma
hibernate hsqldb dialect
I have webapps deployed on a Jetty server and connected to HSQLDB databases located on the HSQLDB server. I get this error when I try to create an entity:ERROR org.hibernate.util.JDBCExceptionReporter Unexpected token: NEXTVAL in statement [/* dynamic native SQL query */ SELECT nextval(‘campagne_sequence’)] I initialize the sequence as follows:CREATE SEQUENCE PUBLIC.CAMPAGNE_SEQUENCE START WITH 1 INCREMENT BY 1In my webapp, I set the Hibernate dialect with org.hibernate.dialect.HSQLDialectI chec
Pascal Thivent
java hibernate orm
This post is an continuation of this postI have DlUser Class each object of this class may have DLFaceBook class and each object of DlFaceBook can have Friends which are mapped as myFriends. I’m trying to map relation of the same class as many to many relation using bag mapping,composite primary key and static inner class. my code is the following:public class DlUser{public DlUser(){}Long Id;String FirstName;String LastName;….DlFaceBook fbuser;//// all requred getters and setters… }The Faceb
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