G
graf.laszlo
Hi
Reading the Hibernate ref. I decided to try a small example, the
weblog.
I am using JBOSS-4.0.4.GA, EJB3 and hibernate-3.2. When I want to
create a new BlogItems object, by adding it to the list of BlogItems,
wich belongs to Blogs entity, I get the
illegal access to loading collection
error message.
These are the Java sources:
- the Blogs.java (ENTITY)
package weblog;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
@Entity
@Table(name = "weblog.blogs", uniqueConstraints =
{ @UniqueConstraint(columnNames = { "name" }) })
public class Blogs implements java.io.Serializable {
private static final long serialVersionUID = 255571063365822285L;
private int blogId;
private String name;
private Set<BlogItems> blogItemses = new HashSet<BlogItems>(0);
public Blogs() {}
public Blogs(int blogId) {
this.blogId = blogId;
}
public Blogs(int blogId, String name) {
this.blogId = blogId;
this.name = name;
}
public Blogs(int blogId, String name, Set<BlogItems> blogItemses) {
this.blogId = blogId;
this.name = name;
this.blogItemses = blogItemses;
}
@Id
@Column(name = "blog_id", unique = true, nullable = false, insertable
= true, updatable = true)
public int getBlogId() { return this.blogId; }
public void setBlogId(int blogId) { this.blogId = blogId; }
@Column(name = "name", unique = true, nullable = false, insertable =
true, updatable = true, length = 50)
public String getName() { return this.name; }
public void setName(String name) { this.name = name; }
@OneToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY,
mappedBy = "blogs")
public Set<BlogItems> getBlogItemses() { return this.blogItemses; }
public void setBlogItemses(Set<BlogItems> blogItemses)
{ this.blogItemses = blogItemses; }
@Override
public int hashCode() {
final int PRIME = 31;
int result = 1;
result = PRIME * result + blogId;
result = PRIME * result + ((blogItemses == null) ? 0 :
blogItemses.hashCode());
result = PRIME * result + ((name == null) ? 0 : name.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final Blogs other = (Blogs) obj;
if (blogId != other.blogId)
return false;
if (blogItemses == null) {
if (other.blogItemses != null)
return false;
} else if (!blogItemses.equals(other.blogItemses))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
return true;
}
}
- the BlogItems (ENTITY)
package weblog;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name = "weblog.blog_items", uniqueConstraints = {})
public class BlogItems implements java.io.Serializable {
private static final long serialVersionUID = 288936795343606406L;
private int blogItemId;
private Blogs blogs;
private String title;
private String text;
private Date datetime;
public BlogItems() { }
public BlogItems(int blogItemId, String title) {
this.blogItemId = blogItemId;
this.title = title;
this.text = title;
this.datetime = new Date();
}
public BlogItems(int blogItemId, Blogs blogs, String title, String
text,
Date datetime) {
this.blogItemId = blogItemId;
this.blogs = blogs;
this.title = title;
this.text = text;
this.datetime = datetime;
}
@Id
@Column(name = "blog_item_id", unique = true, nullable = false,
insertable = true, updatable = true)
public int getBlogItemId() {
return this.blogItemId;
}
public void setBlogItemId(int blogItemId) {
this.blogItemId = blogItemId;
}
@ManyToOne(cascade = {}, fetch = FetchType.LAZY)
@JoinColumn(name = "blog", unique = false, nullable = false,
insertable = true, updatable = true)
public Blogs getBlogs() {
return this.blogs;
}
public void setBlogs(Blogs blogs) {
this.blogs = blogs;
}
@Column(name = "title", unique = false, nullable = false, insertable
= true, updatable = true, length = 50)
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
@Column(name = "text", unique = false, nullable = false, insertable =
true, updatable = true, length = 50)
public String getText() {
return this.text;
}
public void setText(String text) {
this.text = text;
}
@Temporal(TemporalType.DATE)
@Column(name = "datetime", unique = false, nullable = false,
insertable = true, updatable = true, length = 4)
public Date getDatetime() {
return this.datetime;
}
public void setDatetime(Date datetime) {
this.datetime = datetime;
}
@Override
public int hashCode() {
final int PRIME = 31;
int result = 1;
result = PRIME * result + blogItemId;
result = PRIME * result + ((blogs == null) ? 0 : blogs.hashCode());
result = PRIME * result + ((datetime == null) ? 0 :
datetime.hashCode());
result = PRIME * result + ((text == null) ? 0 : text.hashCode());
result = PRIME * result + ((title == null) ? 0 : title.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final BlogItems other = (BlogItems) obj;
if (blogItemId != other.blogItemId)
return false;
if (blogs == null) {
if (other.blogs != null)
return false;
} else if (!blogs.equals(other.blogs))
return false;
if (datetime == null) {
if (other.datetime != null)
return false;
} else if (!datetime.equals(other.datetime))
return false;
if (text == null) {
if (other.text != null)
return false;
} else if (!text.equals(other.text))
return false;
if (title == null) {
if (other.title != null)
return false;
} else if (!title.equals(other.title))
return false;
return true;
}
}
and the STATELESS beans:
package weblog;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@Stateless
public class BlogsBean implements BlogsRemote, BlogsLocal,
java.io.Serializable {
private static final long serialVersionUID = 2078312303442351155L;
private static final Log log = LogFactory.getLog(BlogsBean.class);
@PersistenceContext(unitName="webloan")
private EntityManager entityManager;
public void persist(Blogs transientInstance) {
log.debug("persisting Blogs instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
} catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void remove(Blogs persistentInstance) {
log.debug("removing Blogs instance");
try {
entityManager.remove(persistentInstance);
log.debug("remove successful");
} catch (RuntimeException re) {
log.error("remove failed", re);
throw re;
}
}
public Blogs merge(Blogs detachedInstance) {
log.debug("merging Blogs instance");
try {
Blogs result = entityManager.merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public Blogs findById(int id) {
log.debug("getting Blogs instance with id: " + id);
try {
Blogs instance = entityManager.find(Blogs.class, id);
log.debug("get successful");
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
public void addItem(int blog_id, int blogitem_id, String text) {
log.debug("1");
try {
Blogs instance = entityManager.find(Blogs.class, blog_id);
BlogItems bi = new BlogItems(blogitem_id, text);
instance.getBlogItemses().add(bi);
Blogs result = entityManager.merge(instance);
log.debug("merge successful");
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
}
package gl.weblog;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@Stateless
public class BlogItemsBean implements BlogItemsRemote, BlogItemsLocal,
java.io.Serializable {
private static final long serialVersionUID = -6463759247311226709L;
private static final Log log =
LogFactory.getLog(BlogItemsBean.class);
@PersistenceContext(unitName="webloan")
private EntityManager entityManager;
public void persist(BlogItems transientInstance) {
log.debug("persisting BlogItems instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
} catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void remove(BlogItems persistentInstance) {
log.debug("removing BlogItems instance");
try {
entityManager.remove(persistentInstance);
log.debug("remove successful");
} catch (RuntimeException re) {
log.error("remove failed", re);
throw re;
}
}
public BlogItems merge(BlogItems detachedInstance) {
log.debug("merging BlogItems instance");
try {
BlogItems result = entityManager.merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public BlogItems findById(int id) {
log.debug("getting BlogItems instance with id: " + id);
try {
BlogItems instance = entityManager.find(BlogItems.class, id);
log.debug("get successful");
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
}
My client source looks like this:
package weblog;
import java.util.List;
import java.util.Properties;
import javax.naming.InitialContext;
public class Test01 {
Blogs ablogok;
BlogItems ablogitemek;
Test01(String blog_id, String blogitem_id, String blogitem_title) {
System.out.println("- 0:"+blog_id);
System.out.println("- 1:"+blogitem_id);
System.out.println("- 2:"+blogitem_title);
}
public void addItemToBlog(String blog_id, String blogitem_id, String
blogitem_title) {
Integer BLOG_ID = new Integer(blog_id);
Integer BLOGITEM_ID = new Integer(blogitem_id);
try {
Properties properties = new Properties();
properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.factory.url.pkgs","=org.jboss.naming
rg.jnp.interfaces");
properties.put("java.naming.provider.url","192.1xx.1xx.1xx:1099");
InitialContext ctx = new InitialContext();
BlogsInterface bf = (BlogsInterface) ctx.lookup("BlogsBean/
remote");
bf.addItem(BLOG_ID.intValue(), BLOGITEM_ID.intValue(),
blogitem_title);
} catch(Exception ex) {
System.out.println("ERROR: "+ex.getMessage()+"\n");
//ex.printStackTrace();
}
}
public static void main(String[] args) {
Test01 t1 = new Test01(args[0], args[1], args[2]);
t1.addItemToBlog(args[0], args[1], args[2]);
t1 = null;
}
}
and the error stack
Code:
15:27:50,075 ERROR [LazyInitializationException] illegal access to
loading collection
org.hibernate.LazyInitializationException: illegal access to loading
collection
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:341)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:
355)
at weblog.Blogs.hashCode(Blogs.java:58)
at weblog.BlogItems.hashCode(BlogItems.java:101)
at java.util.HashMap.put(HashMap.java:372)
at java.util.HashSet.add(HashSet.java:200)
at java.util.AbstractCollection.addAll(AbstractCollection.java:
238)
at
org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:273)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.jav
a:183)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:268)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:249)
at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:
866)
at
org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:
853)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:
224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:
1919)
at
org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:
36)
at
org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollect
ionPersister.java:541)
at
org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(D
efaultInitializeCollectionEventListener.java:60)
at
org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:
1705)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:344)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.AbstractPersistentCollection.readElementExistence(AbstractPersis
tentCollection.java:142)
at
org.hibernate.collection.PersistentSet.add(PersistentSet.java:162)
at weblog.BlogsBean.addItem(BlogsBean.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:589)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
112)
at
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:
166)
at
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor
..java:63)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedE
ntityManagerInterceptor.java:54)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:
79)
at org.jboss.aspects.tx.TxInterceptor
$Required.invoke(TxInterceptor.java:197)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:
76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor
..java:62)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.jav
a:78)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:
1
06)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:
225)
at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandl
er.java:82)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
828)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
681)
at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:
358)
at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:
398)
at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:
239)
15:27:50,081 ERROR [BlogsBean] merge failed
org.hibernate.LazyInitializationException: illegal access to loading
collection
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:341)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:
355)
at weblog.Blogs.hashCode(Blogs.java:58)
at weblog.BlogItems.hashCode(BlogItems.java:101)
at java.util.HashMap.put(HashMap.java:372)
at java.util.HashSet.add(HashSet.java:200)
at java.util.AbstractCollection.addAll(AbstractCollection.java:
238)
at
org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:273)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.jav
a:183)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:268)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:249)
at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:
866)
at
org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:
853)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:
224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:
1919)
at
org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:
36)
at
org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollect
ionPersister.java:541)
at
org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(D
efaultInitializeCollectionEventListener.java:60)
at
org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:
1705)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:344)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.AbstractPersistentCollection.readElementExistence(AbstractPersis
tentCollection.java:142)
at
org.hibernate.collection.PersistentSet.add(PersistentSet.java:162)
at weblog.BlogsBean.addItem(BlogsBean.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:589)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
112)
at
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:
166)
at
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor
..java:63)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedE
ntityManagerInterceptor.java:54)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:
79)
at org.jboss.aspects.tx.TxInterceptor
$Required.invoke(TxInterceptor.java:197)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:
76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor
..java:62)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.jav
a:78)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:
1
06)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:
225)
at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandl
er.java:82)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
828)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
681)
at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:
358)
at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:
398)
at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:
239)
Please help me.
Thank you
Reading the Hibernate ref. I decided to try a small example, the
weblog.
I am using JBOSS-4.0.4.GA, EJB3 and hibernate-3.2. When I want to
create a new BlogItems object, by adding it to the list of BlogItems,
wich belongs to Blogs entity, I get the
illegal access to loading collection
error message.
These are the Java sources:
- the Blogs.java (ENTITY)
package weblog;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
@Entity
@Table(name = "weblog.blogs", uniqueConstraints =
{ @UniqueConstraint(columnNames = { "name" }) })
public class Blogs implements java.io.Serializable {
private static final long serialVersionUID = 255571063365822285L;
private int blogId;
private String name;
private Set<BlogItems> blogItemses = new HashSet<BlogItems>(0);
public Blogs() {}
public Blogs(int blogId) {
this.blogId = blogId;
}
public Blogs(int blogId, String name) {
this.blogId = blogId;
this.name = name;
}
public Blogs(int blogId, String name, Set<BlogItems> blogItemses) {
this.blogId = blogId;
this.name = name;
this.blogItemses = blogItemses;
}
@Id
@Column(name = "blog_id", unique = true, nullable = false, insertable
= true, updatable = true)
public int getBlogId() { return this.blogId; }
public void setBlogId(int blogId) { this.blogId = blogId; }
@Column(name = "name", unique = true, nullable = false, insertable =
true, updatable = true, length = 50)
public String getName() { return this.name; }
public void setName(String name) { this.name = name; }
@OneToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY,
mappedBy = "blogs")
public Set<BlogItems> getBlogItemses() { return this.blogItemses; }
public void setBlogItemses(Set<BlogItems> blogItemses)
{ this.blogItemses = blogItemses; }
@Override
public int hashCode() {
final int PRIME = 31;
int result = 1;
result = PRIME * result + blogId;
result = PRIME * result + ((blogItemses == null) ? 0 :
blogItemses.hashCode());
result = PRIME * result + ((name == null) ? 0 : name.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final Blogs other = (Blogs) obj;
if (blogId != other.blogId)
return false;
if (blogItemses == null) {
if (other.blogItemses != null)
return false;
} else if (!blogItemses.equals(other.blogItemses))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
return true;
}
}
- the BlogItems (ENTITY)
package weblog;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name = "weblog.blog_items", uniqueConstraints = {})
public class BlogItems implements java.io.Serializable {
private static final long serialVersionUID = 288936795343606406L;
private int blogItemId;
private Blogs blogs;
private String title;
private String text;
private Date datetime;
public BlogItems() { }
public BlogItems(int blogItemId, String title) {
this.blogItemId = blogItemId;
this.title = title;
this.text = title;
this.datetime = new Date();
}
public BlogItems(int blogItemId, Blogs blogs, String title, String
text,
Date datetime) {
this.blogItemId = blogItemId;
this.blogs = blogs;
this.title = title;
this.text = text;
this.datetime = datetime;
}
@Id
@Column(name = "blog_item_id", unique = true, nullable = false,
insertable = true, updatable = true)
public int getBlogItemId() {
return this.blogItemId;
}
public void setBlogItemId(int blogItemId) {
this.blogItemId = blogItemId;
}
@ManyToOne(cascade = {}, fetch = FetchType.LAZY)
@JoinColumn(name = "blog", unique = false, nullable = false,
insertable = true, updatable = true)
public Blogs getBlogs() {
return this.blogs;
}
public void setBlogs(Blogs blogs) {
this.blogs = blogs;
}
@Column(name = "title", unique = false, nullable = false, insertable
= true, updatable = true, length = 50)
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
@Column(name = "text", unique = false, nullable = false, insertable =
true, updatable = true, length = 50)
public String getText() {
return this.text;
}
public void setText(String text) {
this.text = text;
}
@Temporal(TemporalType.DATE)
@Column(name = "datetime", unique = false, nullable = false,
insertable = true, updatable = true, length = 4)
public Date getDatetime() {
return this.datetime;
}
public void setDatetime(Date datetime) {
this.datetime = datetime;
}
@Override
public int hashCode() {
final int PRIME = 31;
int result = 1;
result = PRIME * result + blogItemId;
result = PRIME * result + ((blogs == null) ? 0 : blogs.hashCode());
result = PRIME * result + ((datetime == null) ? 0 :
datetime.hashCode());
result = PRIME * result + ((text == null) ? 0 : text.hashCode());
result = PRIME * result + ((title == null) ? 0 : title.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final BlogItems other = (BlogItems) obj;
if (blogItemId != other.blogItemId)
return false;
if (blogs == null) {
if (other.blogs != null)
return false;
} else if (!blogs.equals(other.blogs))
return false;
if (datetime == null) {
if (other.datetime != null)
return false;
} else if (!datetime.equals(other.datetime))
return false;
if (text == null) {
if (other.text != null)
return false;
} else if (!text.equals(other.text))
return false;
if (title == null) {
if (other.title != null)
return false;
} else if (!title.equals(other.title))
return false;
return true;
}
}
and the STATELESS beans:
package weblog;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@Stateless
public class BlogsBean implements BlogsRemote, BlogsLocal,
java.io.Serializable {
private static final long serialVersionUID = 2078312303442351155L;
private static final Log log = LogFactory.getLog(BlogsBean.class);
@PersistenceContext(unitName="webloan")
private EntityManager entityManager;
public void persist(Blogs transientInstance) {
log.debug("persisting Blogs instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
} catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void remove(Blogs persistentInstance) {
log.debug("removing Blogs instance");
try {
entityManager.remove(persistentInstance);
log.debug("remove successful");
} catch (RuntimeException re) {
log.error("remove failed", re);
throw re;
}
}
public Blogs merge(Blogs detachedInstance) {
log.debug("merging Blogs instance");
try {
Blogs result = entityManager.merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public Blogs findById(int id) {
log.debug("getting Blogs instance with id: " + id);
try {
Blogs instance = entityManager.find(Blogs.class, id);
log.debug("get successful");
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
public void addItem(int blog_id, int blogitem_id, String text) {
log.debug("1");
try {
Blogs instance = entityManager.find(Blogs.class, blog_id);
BlogItems bi = new BlogItems(blogitem_id, text);
instance.getBlogItemses().add(bi);
Blogs result = entityManager.merge(instance);
log.debug("merge successful");
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
}
package gl.weblog;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@Stateless
public class BlogItemsBean implements BlogItemsRemote, BlogItemsLocal,
java.io.Serializable {
private static final long serialVersionUID = -6463759247311226709L;
private static final Log log =
LogFactory.getLog(BlogItemsBean.class);
@PersistenceContext(unitName="webloan")
private EntityManager entityManager;
public void persist(BlogItems transientInstance) {
log.debug("persisting BlogItems instance");
try {
entityManager.persist(transientInstance);
log.debug("persist successful");
} catch (RuntimeException re) {
log.error("persist failed", re);
throw re;
}
}
public void remove(BlogItems persistentInstance) {
log.debug("removing BlogItems instance");
try {
entityManager.remove(persistentInstance);
log.debug("remove successful");
} catch (RuntimeException re) {
log.error("remove failed", re);
throw re;
}
}
public BlogItems merge(BlogItems detachedInstance) {
log.debug("merging BlogItems instance");
try {
BlogItems result = entityManager.merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public BlogItems findById(int id) {
log.debug("getting BlogItems instance with id: " + id);
try {
BlogItems instance = entityManager.find(BlogItems.class, id);
log.debug("get successful");
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
}
My client source looks like this:
package weblog;
import java.util.List;
import java.util.Properties;
import javax.naming.InitialContext;
public class Test01 {
Blogs ablogok;
BlogItems ablogitemek;
Test01(String blog_id, String blogitem_id, String blogitem_title) {
System.out.println("- 0:"+blog_id);
System.out.println("- 1:"+blogitem_id);
System.out.println("- 2:"+blogitem_title);
}
public void addItemToBlog(String blog_id, String blogitem_id, String
blogitem_title) {
Integer BLOG_ID = new Integer(blog_id);
Integer BLOGITEM_ID = new Integer(blogitem_id);
try {
Properties properties = new Properties();
properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.factory.url.pkgs","=org.jboss.naming
rg.jnp.interfaces");properties.put("java.naming.provider.url","192.1xx.1xx.1xx:1099");
InitialContext ctx = new InitialContext();
BlogsInterface bf = (BlogsInterface) ctx.lookup("BlogsBean/
remote");
bf.addItem(BLOG_ID.intValue(), BLOGITEM_ID.intValue(),
blogitem_title);
} catch(Exception ex) {
System.out.println("ERROR: "+ex.getMessage()+"\n");
//ex.printStackTrace();
}
}
public static void main(String[] args) {
Test01 t1 = new Test01(args[0], args[1], args[2]);
t1.addItemToBlog(args[0], args[1], args[2]);
t1 = null;
}
}
and the error stack
Code:
15:27:50,075 ERROR [LazyInitializationException] illegal access to
loading collection
org.hibernate.LazyInitializationException: illegal access to loading
collection
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:341)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:
355)
at weblog.Blogs.hashCode(Blogs.java:58)
at weblog.BlogItems.hashCode(BlogItems.java:101)
at java.util.HashMap.put(HashMap.java:372)
at java.util.HashSet.add(HashSet.java:200)
at java.util.AbstractCollection.addAll(AbstractCollection.java:
238)
at
org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:273)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.jav
a:183)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:268)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:249)
at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:
866)
at
org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:
853)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:
224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:
1919)
at
org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:
36)
at
org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollect
ionPersister.java:541)
at
org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(D
efaultInitializeCollectionEventListener.java:60)
at
org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:
1705)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:344)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.AbstractPersistentCollection.readElementExistence(AbstractPersis
tentCollection.java:142)
at
org.hibernate.collection.PersistentSet.add(PersistentSet.java:162)
at weblog.BlogsBean.addItem(BlogsBean.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:589)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
112)
at
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:
166)
at
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor
..java:63)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedE
ntityManagerInterceptor.java:54)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:
79)
at org.jboss.aspects.tx.TxInterceptor
$Required.invoke(TxInterceptor.java:197)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:
76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor
..java:62)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.jav
a:78)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:
1
06)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:
225)
at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandl
er.java:82)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
828)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
681)
at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:
358)
at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:
398)
at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:
239)
15:27:50,081 ERROR [BlogsBean] merge failed
org.hibernate.LazyInitializationException: illegal access to loading
collection
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:341)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:
355)
at weblog.Blogs.hashCode(Blogs.java:58)
at weblog.BlogItems.hashCode(BlogItems.java:101)
at java.util.HashMap.put(HashMap.java:372)
at java.util.HashSet.add(HashSet.java:200)
at java.util.AbstractCollection.addAll(AbstractCollection.java:
238)
at
org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:273)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.jav
a:183)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:268)
at
org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.ja
va:249)
at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:
866)
at
org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:
853)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:
224)
at org.hibernate.loader.Loader.loadCollection(Loader.java:
1919)
at
org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:
36)
at
org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollect
ionPersister.java:541)
at
org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(D
efaultInitializeCollectionEventListener.java:60)
at
org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:
1705)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollec
tion.java:344)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.j
ava:86)
at
org.hibernate.collection.AbstractPersistentCollection.readElementExistence(AbstractPersis
tentCollection.java:142)
at
org.hibernate.collection.PersistentSet.add(PersistentSet.java:162)
at weblog.BlogsBean.addItem(BlogsBean.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:589)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
112)
at
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:
166)
at
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor
..java:63)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedE
ntityManagerInterceptor.java:54)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:
79)
at org.jboss.aspects.tx.TxInterceptor
$Required.invoke(TxInterceptor.java:197)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:
76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor
..java:62)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.jav
a:78)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:
47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:
1
06)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:
101)
at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:
225)
at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandl
er.java:82)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
828)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:
681)
at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:
358)
at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:
398)
at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:
239)
Please help me.
Thank you