I have a a project name drop-down list, and based on the selected value a schema drop-down list is generated.
After the schema list is generated, there is a 'choose file' option where a script name is chosen which is to be run on multiple schemas.
Both the project list values and the schema list values are stored in the database. There is another table in the database where the schema credentials are stored.
I want to know that how create connections on those multiple schemas, and how to run a script in multiple schemas selected from that schema drop-down list.
I have executed the code in one schema using iBatis framework using scriptrunner method.
Table 1: ProjectName
PROJECT_PK,
PROJECT_CODE,
PROJECT_NAME
Table2: ComponentName
COMPONENT_PK,
COMPONENT_CODE,
COMPONENT_NAME,
PROJECT_PK
Table 3: SchemaName (This table contains the credentials of Other Schemas)
SCHEMA_PK,
SCHEMA_NAME,
PASSWORD,
ORACLE_SID,
HOST_NAME,
PORT_ID
Table 4: PROJECT_DETAIL
PROJECT_DETAIL_PK,
COMPONENT_PK,
SCHEMA_PK
Table5: COMPONENT_DETAILS
COMPONENT_DETAILS_PK,
PROJECT_PK,
SCHEMA_PK
I am attaching the scenario image.
I propose you create a 'super-schema' with the appropiate grants on every other schema, and create your JDBC connection for this 'super-schema'. This will make you need some tampering with the sql script - you will need to write it with some marker to easily substitute the schema, something like
ALTER TABLE ${SCHEMA_MARKER}.INVOICES ADD CLIENT_ADRRESS Varchar2(35);
And your java code would substitute it for the schema you are targeting. With some imagination you can extend this idea to execute bulk DDL scripts on all your schemas.
By the way, I understand by your question that you have many schemas with the same structure. I was forced once to work with such a legacy structure, and so I know there is a lot of momentum in corporate structures; nonetheless I must recommend you to redesign such system. Think for example in creating materialized views on your super-schema, replicating your schema structure but with a new field in every table primary key (this new field would fill the gap that made whomever did it separe the data in many schemas for starters).
This will surely make your query cache suffer a lot less, and will make easier the development of any new software that needs to work with that 'distributed' data.
In Oracle, a schema is basically a user. So to create a table FOO in the schema SX, you just login as user SX and execute create table FOO (...) (without specifying a schema). The user == schema convention in Oracle will make sure this works.
To login as user SX, get hold of your DataSource and use getConnection(String username, String password) instead of the default getConnection()
Alternative ways are to add placeholders in your script that you process to generate valid SQL first. See the answer by Jorge_B for an example.
Lastly, you can change the default schema using ALTER SESSION (see Default Schema in Oracle Connection URL). The problem with this approach is that you must restore the schema before closing the connection when using a web container with a DataSource - in this scenario, connections are never really closed, so the next piece of code asking for a connection will get one with an unexpected default schema -> hard to find errors.
Here is the DAO class to create multiple schema connection on the same database at run time.
We need to enter the schema names at run time through and call that in some servlet.
The schema details i.e username, password,host Id,port Id and SID are to be stored in the database tables though which the connections will be created.
The created connections are stored here in the list which can be used at a later point of time.
The credential DTO here is the object which maps to the database tables in the database and then
Connection conn=DBUtil.getConnection(constants.DB_DS_NAME);
Statement stmt=null;
stmt=conn.createStatement();
ResultSet rs= null;
Connection [] con=new Connection[schemaname.length];
int i,j;
String [] url=new String[schemaname.length];
String [] username=new String[schemaname.length];
String [] password=new String[schemaname.length];
List<CredentialDTO> creDTOlist=new ArrayList<CredentialDTO>();
String query1="insert into dba_project_master VALUES(9,'abc','abc','abc','abc',40)";
String query2="CREATE TABLE EMP(EMPNO NUMBER(4,0) NOT NULL ENABLE,ENAME VARCHAR2(10 BYTE),JOB VARCHAR2(9 BYTE), SAL NUMBER(7,2),DEPTNO NUMBER(2,0))";
try
{
for(i=0;i<schemaname.length;i++){
String query=" select * from dba_schema_details where schema_name="+DBUtil.enquoteString(schemaname[i]);
rs=stmt.executeQuery(query);
while(rs.next()){
CredentialDTO creDTO=new CredentialDTO();
creDTO.setSCHEMA_PK(rs.getString("SCHEMA_PK"));
creDTO.setSCHEMA_NAME(rs.getString("SCHEMA_NAME"));
creDTO.setPASSWORD(rs.getString("PASSWORD"));
creDTO.setORACLE_SID(rs.getString("ORACLE_SID"));
creDTO.setHOST_NAME(rs.getString("HOST_NAME"));
creDTO.setPORT_ID(rs.getString("PORT_ID"));
creDTOlist.add(creDTO);
}
}
System.out.println("creDTOlist size:"+creDTOlist.size());
//create URL for the schema name
int m=creDTOlist.size();
Iterator<CredentialDTO> LItr= creDTOlist.iterator();
String [] username1=new String[m];
String [] password1=new String[m];
i=0;
while(LItr.hasNext()){
System.out.println("iteration "+i);
CredentialDTO temp = LItr.next();
String URL="jdbc:oracle:thin:#"+temp.getHOST_NAME()+":"+temp.getPORT_ID()+":"+temp.getORACLE_SID();
System.out.println("URL:"+URL);
username1[i]=temp.getSCHEMA_NAME();
System.out.println("iteartion "+i+" username="+username1[i]);
password1[i]=temp.getPASSWORD();
System.out.println("iteartion "+i+" password="+password1[i]);
Class.forName("oracle.jdbc.OracleDriver");
con[i]=DriverManager.getConnection(URL, username1[i], password1[i]);
System.out.println("Connection Name:" +con[i]);
Statement st1=con[i].createStatement();
con[i].setAutoCommit(false);
st1.addBatch(query1);
st1.addBatch(query2);
int [] update=st1.executeBatch();
i++;
}
}
catch(Exception ex){
ex.printStackTrace();
}finally
{
if (conn != null) try{conn.close();} catch(SQLException ignore) {}
if (stmt!= null) try{stmt.close();} catch(SQLException ignore) {}
if (rs != null) try{rs.close();} catch(SQLException ignore) {}
}
return creDTOlist;
}
}
I get following hibernate error. I am able to identify the function which causes the issue. Unfortunately there are several DB calls in the function. I am unable to find the line which causes the issue since hibernate flush the session at the end of the transaction. The below mentioned hibernate error looks like a general error. It doesn't even mentioned which Bean causes the issue. Anyone familiar with this hibernate error?
org.hibernate.StaleStateException: Batch update returned unexpected row count from update: 0 actual row count: 0 expected: 1
at org.hibernate.jdbc.BatchingBatcher.checkRowCount(BatchingBatcher.java:93)
at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:79)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:58)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:195)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:142)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:985)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:333)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:584)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransacti
onManager.java:500)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManag
er.java:473)
at org.springframework.transaction.interceptor.TransactionAspectSupport.doCommitTransactionAfterReturning(Transaction
AspectSupport.java:267)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
I got the same exception while deleting a record by Id that does not exists at all. So check that record you are updating/Deleting actually exists in DB
Without code and mappings for your transactions, it'll be next to impossible to investigate the problem.
However, to get a better handle as to what causes the problem, try the following:
In your hibernate configuration, set hibernate.show_sql to true. This should show you the SQL that is executed and causes the problem.
Set the log levels for Spring and Hibernate to DEBUG, again this will give you a better idea as to which line causes the problem.
Create a unit test which replicates the problem without configuring a transaction manager in Spring. This should give you a better idea of the offending line of code.
Solution:
In the Hibernate mapping file for the id property, if you use any generator class, for that property you should not set the value explicitly by using a setter method.
If you set the value of the Id property explicitly, it will lead the error above. Check this to avoid this error.
or
It's error show when you mention in the mapping file the field generator="native" or "incremental" and in your DATABASE the table mapped is not auto_incremented
Solution: Go to your DATABASE and update your table to set auto_increment
In my case, I came to this exception in two similar cases:
In a method annotated with #Transactional I had a call to another service (with long times of response). The method updates some properties of the entity (after the method, the entity still exists in the database). If the user requests two times the method (as he thinks it doesn't work the first time) when exiting from the transactional method the second time, Hibernate tries to update an entity which already changed its state from the beginning of the transaction. As Hibernate search for an entity in a state, and found the same entity but already changed by the first request, it throws an exception as it can't update the entity. It's like a conflict in GIT.
I had automatic requests (for monitoring the platform) which update an entity (and the manual rollback a few seconds later). But this platform is already used by a test team. When a tester performs a test in the same entity as the automatic requests, (within the same hundredth of a millisecond), I get the exception. As in the previous case, when exiting from the second transaction, the entity previously fetched already changed.
Conclusion: in my case, it wasn't a problem which can be found in the code. This exception is thrown when Hibernate founds that the entity first fetched from the database changed during the current transaction, so it can't flush it to the database as Hibernate doesn't know which is the correct version of the entity: the one the current transaction fetch at the beginning; or the one already stored in the database.
Solution: to solve the problem, you will have to play with the Hibernate LockMode to find the one which best fit your requirements.
This happened to me once by accident when I was assigning specific IDs to some objects (testing) and then I was trying to save them in the database. The problem was that in the database there was an specific policy for setting up the IDs of the objects. Just do not assign an ID if you have a policy at Hibernate level.
I just encountered this problem and found out I was deleting a record and trying to update it afterwards in a Hibernate transaction.
Hibernate 5.4.1 and HHH-12878 issue
Prior to Hibernate 5.4.1, the optimistic locking failure exceptions (e.g., StaleStateException or OptimisticLockException) didn't include the failing statement.
The HHH-12878 issue was created to improve Hibernate so that when throwing an optimistic locking exception, the JDBC PreparedStatement implementation is logged as well:
if ( expectedRowCount > rowCount ) {
throw new StaleStateException(
"Batch update returned unexpected row count from update ["
+ batchPosition + "]; actual row count: " + rowCount
+ "; expected: " + expectedRowCount + "; statement executed: "
+ statement
);
}
Testing Time
I created the BatchingOptimisticLockingTest in my High-Performance Java Persistence GitHub repository to demonstrate how the new behavior works.
First, we will define a Post entity that defines a #Version property, therefore enabling the implicit optimistic locking mechanism:
#Entity(name = "Post")
#Table(name = "post")
public class Post {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
private String title;
#Version
private short version;
public Long getId() {
return id;
}
public Post setId(Long id) {
this.id = id;
return this;
}
public String getTitle() {
return title;
}
public Post setTitle(String title) {
this.title = title;
return this;
}
public short getVersion() {
return version;
}
}
We will enable the JDBC batching using the following 3 configuration properties:
properties.put("hibernate.jdbc.batch_size", "5");
properties.put("hibernate.order_inserts", "true");
properties.put("hibernate.order_updates", "true");
We are going to create 3 Post entities:
doInJPA(entityManager -> {
for (int i = 1; i <= 3; i++) {
entityManager.persist(
new Post()
.setTitle(String.format("Post no. %d", i))
);
}
});
And Hibernate will execute a JDBC batch insert:
SELECT nextval ('hibernate_sequence')
SELECT nextval ('hibernate_sequence')
SELECT nextval ('hibernate_sequence')
Query: [
INSERT INTO post (title, version, id)
VALUES (?, ?, ?)
],
Params:[
(Post no. 1, 0, 1),
(Post no. 2, 0, 2),
(Post no. 3, 0, 3)
]
So, we know that JDBC batching works just fine.
Now, let's replicate the optimistic locking issue:
doInJPA(entityManager -> {
List<Post> posts = entityManager.createQuery("""
select p
from Post p
""", Post.class)
.getResultList();
posts.forEach(
post -> post.setTitle(
post.getTitle() + " - 2nd edition"
)
);
executeSync(
() -> doInJPA(_entityManager -> {
Post post = _entityManager.createQuery("""
select p
from Post p
order by p.id
""", Post.class)
.setMaxResults(1)
.getSingleResult();
post.setTitle(post.getTitle() + " - corrected");
})
);
});
The first transaction selects all Post entities and modifies the title properties.
However, before the first EntityManager is flushed, we are going to execute a second transition using the executeSync method.
The second transaction modifies the first Post, so its version is going to be incremented:
Query:[
UPDATE
post
SET
title = ?,
version = ?
WHERE
id = ? AND
version = ?
],
Params:[
('Post no. 1 - corrected', 1, 1, 0)
]
Now, when the first transaction tries to flush the EntityManager, we will get the OptimisticLockException:
Query:[
UPDATE
post
SET
title = ?,
version = ?
WHERE
id = ? AND
version = ?
],
Params:[
('Post no. 1 - 2nd edition', 1, 1, 0),
('Post no. 2 - 2nd edition', 1, 2, 0),
('Post no. 3 - 2nd edition', 1, 3, 0)
]
o.h.e.j.b.i.AbstractBatchImpl - HHH000010: On release of batch it still contained JDBC statements
o.h.e.j.b.i.BatchingBatch - HHH000315: Exception executing batch [
org.hibernate.StaleStateException:
Batch update returned unexpected row count from update [0];
actual row count: 0;
expected: 1;
statement executed:
PgPreparedStatement [
update post set title='Post no. 3 - 2nd edition', version=1 where id=3 and version=0
]
],
SQL: update post set title=?, version=? where id=? and version=?
So, you need to upgrade to Hibernate 5.4.1 or newer to benefit from this improvement.
This can happen when trigger(s) execute additional DML (data modification) queries which affect the row counts. My solution was to add the following at the top of my trigger:
SET NOCOUNT ON;
I was facing same issue.
The code was working in the testing environment. But it was not working in staging environment.
org.hibernate.jdbc.BatchedTooManyRowsAffectedException: Batch update returned unexpected row count from update [0]; actual row count: 3; expected: 1
The problem was the table had single entry for each primary key in testing DB table. But in staging DB there was multiple entry for same primary key. ( Problem is in staging DB the table didn't had any primary key constraints also there was multiple entry.)
So every time on update operation it gets failed. It tries to update single record and expect to get update count as 1. But since there was 3 records in the table for the same primary key, The result update count finds 3. Since expected update count and actual result update count didn't match, It throws exception and rolls back.
After the I removed all the records which have duplicate primary key and added primary key constraints. It is working fine.
Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected: 1
actual row count: 0 // means no record found to update
update: 0 // means no record found so nothing update
expected: 1 // means expected at least 1 record with key in db table.
Here the problem is that the query trying to update a record for some key, But hibernate didn't find any record with the key.
It also can happen when you try to UPDATE a PRIMARY KEY.
My two cents.
Problem: With Spring Boot 2.7.1 the h2 database version has changed to v2.1.214 which may result into a thrown OptimisticLockException when using generated UUIDs for Id columns, see https://hibernate.atlassian.net/browse/HHH-15373.
Solution: Add columnDefinition="UUID" to the #Column annotation
E.g., with a primary key definition for an entity like this:
#Id
#GeneratedValue(generator = "UUID")
#GenericGenerator(name = "UUID", strategy = "org.hibernate.id.UUIDGenerator")
#Column(name = COLUMN_UUID, updatable = false, nullable = false)
UUID uUID;
Change the column annotation to:
#Column(name = COLUMN_UUID, updatable = false, nullable = false, columnDefinition="UUID")
As Julius says this happens when an update Occurs on an Object that has its children being deleted. (Probably because there was a need for an update for the whole Father Object and sometimes we prefer to delete the children and re -insert them on the Father (new , old doesnt matter )along with any other updates the father could have on any of its other plain fields)
So ...in order for this to work delete the children (within a Transaction) by calling childrenList.clear() (Dont loop through the children and delete each one with some childDAO.delete(childrenList.get(i).delete())) and setting
#OneToMany(cascade = CascadeType.XXX ,orphanRemoval=true) on the Side of the Father Object. Then update the father (fatherDAO.update(father)). (Repeat for every father object) The result is that children have their link to their father stripped off and then they are being removed as orphans by the framework.
I encountered this problem where we had one-many relationship.
In the hibernate hbm mapping file for master, for object with set type arrangement, added cascade="save-update" and it worked fine.
Without this, by default hibernate tries to update for a non-existent record and by doing so it inserts instead.
Another way to get this error is if you have a null item in a collection.
It happens when you try to delete an object and then you try to update the same object. Use this after delete:
session.clear();
i got the same problem and i verified this may occur because of Auto increment primary key. To solve this problem do not inset auto increment value with data set. Insert data without the primary key.
This happened to me too, because I had my id as Long, and I was receiving from the view the value 0, and when I tried to save in the database I got this error, then I fixed it by set the id to null.
This problem mainly occurs when we are trying to save or update the object which are already fetched into memory by a running session.
If you've fetched object from the session and you're trying to update in the database, then this exception may be thrown.
I used session.evict(); to remove the cache stored in hibernate first or if you don't wanna take risk of loosing data, better you make another object for storing the data temp.
try
{
if(!session.isOpen())
{
session=EmployeyDao.getSessionFactory().openSession();
}
tx=session.beginTransaction();
session.evict(e);
session.saveOrUpdate(e);
tx.commit();;
EmployeyDao.shutDown(session);
}
catch(HibernateException exc)
{
exc.printStackTrace();
tx.rollback();
}
I ran into this issue when I was manually beginning and committing transactions inside of method annotated as #Transactional. I fixed the problem by detecting if an active transaction already existed.
//Detect underlying transaction
if (session.getTransaction() != null && session.getTransaction().isActive()) {
myTransaction = session.getTransaction();
preExistingTransaction = true;
} else {
myTransaction = session.beginTransaction();
}
Then I allowed Spring to handle committing the transaction.
private void finishTransaction() {
if (!preExistingTransaction) {
try {
tx.commit();
} catch (HibernateException he) {
if (tx != null) {
tx.rollback();
}
log.error(he);
} finally {
if (newSessionOpened) {
SessionFactoryUtils.closeSession(session);
newSessionOpened = false;
maxResults = 0;
}
}
}
}
This happens when you declared the JSF Managed Bean as
#RequestScoped;
when you should declare as
#SessionScoped;
Regards;
I got this error when I tried to update an object with an id that did not exist in the database. The reason for my mistake was that I had manually assigned a property with the name 'id' to the client side JSON-representation of the object and then when deserializing the object on the server side this 'id' property would overwrite the instance variable (also called 'id') that Hibernate was supposed to generate. So be careful of naming collisions if you are using Hibernate to generate identifiers.
I also came across the same challenge. In my case I was updating an object which was not even existing, using hibernateTemplate.
Actually in my application I was getting a DB object to update. And while updating its values, I also updated its ID by mistake, and went ahead to update it and came across the said error.
I am using hibernateTemplate for CRUD operations.
After reading all answers did´t find anyone to talk about inverse atribute of hibernate.
In my my opinion you should also verify in your relationships mapping whether inverse key word is appropiately setted. Inverse keyword is created to defines which side is the owner to maintain the relationship. The procedure for updating and inserting varies cccording to this attribute.
Let's suppose we have two tables:
principal_table, middle_table
with a relationship of one to many. The hiberntate mapping classes are Principal and Middle respectively.
So the Principal class has a SET of Middle objects. The xml mapping file should be like following:
<hibernate-mapping>
<class name="path.to.class.Principal" table="principal_table" ...>
...
<set name="middleObjects" table="middle_table" inverse="true" fetch="select">
<key>
<column name="PRINCIPAL_ID" not-null="true" />
</key>
<one-to-many class="path.to.class.Middel" />
</set>
...
As inverse is set to ”true”, it means “Middle” class is the relationship owner, so Principal class will NOT UPDATE the relationship.
So the procedure for updating could be implemented like this:
session.beginTransaction();
Principal principal = new Principal();
principal.setSomething("1");
principal.setSomethingElse("2");
Middle middleObject = new Middle();
middleObject.setSomething("1");
middleObject.setPrincipal(principal);
principal.getMiddleObjects().add(middleObject);
session.saveOrUpdate(principal);
session.saveOrUpdate(middleObject); // NOTICE: you will need to save it manually
session.getTransaction().commit();
This worked for me, bu you can suggest some editions in order to improve the solution. That way we all will be learning.
In our case we finally found out the root cause of StaleStateException.
In fact we were deleting the row twice in a single hibernate session. Earlier we were using ojdbc6 lib, and this was ok in this version.
But when we upgraded to odjc7 or ojdbc8, deleting records twice was throwing exception. There was bug in our code where we were deleting twice, but that was not evident in ojdbc6.
We were able to reproduce with this piece of code:
Detail detail = getDetail(Long.valueOf(1396451));
session.delete(detail);
session.flush();
session.delete(detail);
session.flush();
On first flush hibernate goes and makes changes in database. During 2nd flush hibernate compares session's object with actual table's record, but could not find one, hence the exception.
I solved it. I found that there was no primary key for my Id column in table.
Once I created it solved for me. Also there was duplicate id found in table before which I deleted and solved it.
This thread is a bit old, however I thought I should drop my fix here in case it may help someone with same root cause.
I was migrating a Java Spring hibernate app. from Oracle to Postgre, along the migration process, I converted a trigger from Oracle to Postgre, the trigger was "on Before Insert" of a table and was setting a one of the columns value (of course the desired column was marked update=false insert=false in hibernate mapping to allow the trigger to set its value), and when inserting data from the application I got this error Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected: 1
My mistake was that I was setting "Return NULL" at the end of the trigger function, so when the trigger set the column value and the control is back to hibernate for saving, the record was lost as I was returning null.
My fix was to change "Return NULL" to "RETURN NEW" in trigger, this will keep the record available after being altered by the trigger, simply this was what it means by "unexcepted row count for update: 0 expected 1"
This happened if you change something in data set using native sql query but persisted object for same data set is present in session cache.
Use session.evict(yourObject);
Hibernate caches objects from the session. If object is accessed and modified by more than 1 user then org.hibernate.StaleStateException may be be thrown. It may be solved with merge/refresh entity method before saving or using lock. More info: http://java-fp.blogspot.lt/2011/09/orghibernatestalestateexception-batch.html
One of the case
SessionFactory sf=new Configuration().configure().buildSessionFactory();
Session session=sf.openSession();
UserDetails user=new UserDetails();
session.beginTransaction();
user.setUserName("update user agian");
user.setUserId(12);
session.saveOrUpdate(user);
session.getTransaction().commit();
System.out.println("user::"+user.getUserName());
sf.close();
I was facing this exception, and hibernate was working well. I tried to insert manually one record using pgAdmin, here the issue became clear. SQL insert query returns 0 insert. and there is a trigger function that cause this issue because it returns null. so I have only to set it to return new.
and finally I solved the problem.
hope that helps any body.
I want update some of my table in database and want all of these work do in 1 transaction,
first of all I delete some entry in branchbuildin(Table) and Insert new one after this action
The problem occurred when I insert and entry with same buildingname and branch_fk (be cause I have this constraint on this table ( uniqueConstraints={#UniqueConstraint(columnNames={"buildingname","branch_fk"})})) but when I don't use hibernate session and use normal JDBC transaction I don't have these problem.
List<Integer> allBranchBuilding = branchBuildingDao.getAllBranchBuildingID(pkId, sess);
for (Integer integer : allBranchBuilding) {
branchBuildingDao.delete(integer, sess); // delete kardane tamame BranchBuilding ha va tel haie aanha
}
Address myAdr = new Address();
setAddress(myAdr, centralFlag, city, latit, longit, mainstreet, remainAdr, state);
BranchBuildingEntity bbe = new BranchBuildingEntity();
setBranchBuildingEntity(bbe, be, myAdr, city, centralFlag, latit, longit, mainstreet, buildingName, remainAdr, state, des);
branchBuildingDao.save(bbe, sess);//Exception Occurred
I get my session at the first of Method:
Session sess = null;
sess = HibernateUtil.getSession();
Transaction tx = sess.beginTransaction();
You're right, everything occurs in the same transaction, and the same Hibernate Session.
The Session keeps track of every entity it manages. Even though you asked to delete it in the database, the corresponding object is still memorised in the Session until the Session is terminated.
In general, it is possible that
Hibernate reorders your operations
when sending them to the database, for
efficiency reasons.
What you could do is flush (ie. send to the database) your transaction because the save (if needed, you could also clear - ie empty the entities memorized by the Session - it after flushing):
sess.flush();
// sess.clear(); // if needed or convenient for you
branchBuildingDao.save(bbe, sess);
Note also that while your entities are memorized by the session, modifying them will trigger an automatic update when closing the session.
In our project, we have a method that deletes efficiently a collection (and another for an array, declared using the convenient ... parameter syntax) of entities (it works for all entities, it doesn't have to be done for each entity), removing them out of the session at the same time, and taking care of the flushing before :
Loop on all entities, delete it (using sess.delete(e)) and add it to a 'deleteds' list.
Every 50 entities (corresponding to the batch size we configured for efficiency reasons) (and at the end) :
flush the Session to force Hibernate to send immediately the changes to the database,
loop on 'deleteds' list, clear each entity from the Session (using sess.evict(e)).
empty the 'deleteds'list.
Don't worry, flush only sends the SQL to the database. It is still subject to commit or rollback.