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Hibernate allocationSize use in custom sequence generator
2019 Community Moderator ElectionHow to generate a random alpha-numeric string?How do I generate random integers within a specific range in Java?What are the possible values of the #Hibernate hbm2ddl.auto configuration and what do they doWrong ordering in generated table in jpaWhat's the difference between JPA and Hibernate?Using hibernate3-maven-plugin to generate Sequence ScriptsJPA with SequenceGenerator and GeneratedValueIm getting "com.ibm.db2.jcc.am.SqlIntegrityConstraintViolationException: DB2 SQL Error: SQLCODE=-803, SQLSTATE=23505Hibernate Id Sequence Resulting nullprimary key constraint violation exception with oracle sequence Generator and JPA
We are using a SequenceGenerator which is using sequence of our PostgreSQL DB. We know that by default allocationSize() is 50.
Problem is we are moving to custom sequence generator which extends SequenceGenerator class and overridden the function generate(). But some how this is not working and this is contacting DB every time and not keeping buffer on server after multiplying the current sequence by allocationSize().
This is current code of customer sequence generator:
public class UseExistingOrGenerateIdGenerator extends SequenceGenerator
@Override
public Serializable generate(SessionImplementor session, Object object)
throws HibernateException
Serializable id = session.getEntityPersister(null, object)
.getClassMetadata().getIdentifier(object, session);
return id != null ? id : (super.generate(session, object));
In some other class defined the getter:
@Id
@Column(name = "PrimaryID", nullable = false, precision = 38, scale = 0)
@GenericGenerator(name = "primaryIdSeq",
strategy = "com.data.generator.sequence.UseExistingOrGenerateIdGenerator",
parameters =
@Parameter(name = "sequence", value = "Primary_id_SEQUENCE")
)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "primaryIdSeq")
public BigDecimal getReturnId()
return this.returnId;
java postgresql hibernate jpa
edited Mar 6 at 13:35
jarlh
29.7k52138
asked Mar 6 at 13:32
rohit royrohit roy
62
add a comment |
We are using a SequenceGenerator which is using sequence of our PostgreSQL DB. We know that by default allocationSize() is 50.
Problem is we are moving to custom sequence generator which extends SequenceGenerator class and overridden the function generate(). But some how this is not working and this is contacting DB every time and not keeping buffer on server after multiplying the current sequence by allocationSize().
This is current code of customer sequence generator:
public class UseExistingOrGenerateIdGenerator extends SequenceGenerator
@Override
public Serializable generate(SessionImplementor session, Object object)
throws HibernateException
Serializable id = session.getEntityPersister(null, object)
.getClassMetadata().getIdentifier(object, session);
return id != null ? id : (super.generate(session, object));
In some other class defined the getter:
@Id
@Column(name = "PrimaryID", nullable = false, precision = 38, scale = 0)
@GenericGenerator(name = "primaryIdSeq",
strategy = "com.data.generator.sequence.UseExistingOrGenerateIdGenerator",
parameters =
@Parameter(name = "sequence", value = "Primary_id_SEQUENCE")
)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "primaryIdSeq")
public BigDecimal getReturnId()
return this.returnId;
java postgresql hibernate jpa
edited Mar 6 at 13:35
jarlh
29.7k52138
asked Mar 6 at 13:32
rohit royrohit roy
62
add a comment |
We are using a SequenceGenerator which is using sequence of our PostgreSQL DB. We know that by default allocationSize() is 50.
Problem is we are moving to custom sequence generator which extends SequenceGenerator class and overridden the function generate(). But some how this is not working and this is contacting DB every time and not keeping buffer on server after multiplying the current sequence by allocationSize().
This is current code of customer sequence generator:
public class UseExistingOrGenerateIdGenerator extends SequenceGenerator
@Override
public Serializable generate(SessionImplementor session, Object object)
throws HibernateException
Serializable id = session.getEntityPersister(null, object)
.getClassMetadata().getIdentifier(object, session);
return id != null ? id : (super.generate(session, object));
In some other class defined the getter:
@Id
@Column(name = "PrimaryID", nullable = false, precision = 38, scale = 0)
@GenericGenerator(name = "primaryIdSeq",
strategy = "com.data.generator.sequence.UseExistingOrGenerateIdGenerator",
parameters =
@Parameter(name = "sequence", value = "Primary_id_SEQUENCE")
)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "primaryIdSeq")
public BigDecimal getReturnId()
return this.returnId;
java postgresql hibernate jpa
edited Mar 6 at 13:35
jarlh
29.7k52138
asked Mar 6 at 13:32
rohit royrohit roy
62
We are using a SequenceGenerator which is using sequence of our PostgreSQL DB. We know that by default allocationSize() is 50.
Problem is we are moving to custom sequence generator which extends SequenceGenerator class and overridden the function generate(). But some how this is not working and this is contacting DB every time and not keeping buffer on server after multiplying the current sequence by allocationSize().
This is current code of customer sequence generator:
public class UseExistingOrGenerateIdGenerator extends SequenceGenerator
@Override
public Serializable generate(SessionImplementor session, Object object)
throws HibernateException
Serializable id = session.getEntityPersister(null, object)
.getClassMetadata().getIdentifier(object, session);
return id != null ? id : (super.generate(session, object));
In some other class defined the getter:
@Id
@Column(name = "PrimaryID", nullable = false, precision = 38, scale = 0)
@GenericGenerator(name = "primaryIdSeq",
strategy = "com.data.generator.sequence.UseExistingOrGenerateIdGenerator",
parameters =
@Parameter(name = "sequence", value = "Primary_id_SEQUENCE")
)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "primaryIdSeq")
public BigDecimal getReturnId()
return this.returnId;
java postgresql hibernate jpa
java postgresql hibernate jpa
edited Mar 6 at 13:35
jarlh
29.7k52138
asked Mar 6 at 13:32
rohit royrohit roy
62
edited Mar 6 at 13:35
jarlh
29.7k52138
asked Mar 6 at 13:32
rohit royrohit roy
62
edited Mar 6 at 13:35
jarlh
29.7k52138
edited Mar 6 at 13:35
jarlh
29.7k52138
edited Mar 6 at 13:35
jarlh
29.7k52138
29.7k52138
asked Mar 6 at 13:32
rohit royrohit roy
62
asked Mar 6 at 13:32
rohit royrohit roy
62
asked Mar 6 at 13:32
rohit royrohit roy
62
62
add a comment |
add a comment |
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