Spring Framework

org.springframework.jdbc.support.incrementer
Class SybaseMaxValueIncrementer

java.lang.Object
  extended by org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer
      extended by org.springframework.jdbc.support.incrementer.AbstractColumnMaxValueIncrementer
          extended by org.springframework.jdbc.support.incrementer.SybaseMaxValueIncrementer
All Implemented Interfaces:
InitializingBean, DataFieldMaxValueIncrementer
Direct Known Subclasses:
SybaseAnywhereMaxValueIncrementer

public class SybaseMaxValueIncrementer
extends AbstractColumnMaxValueIncrementer

DataFieldMaxValueIncrementer that increments the maximum value of a given Sybase SQL Server table with the equivalent of an auto-increment column. Note: If you use this class, your table key column should NOT be defined as an IDENTITY column, as the sequence table does the job.

This class is intended to be used with Sybase Adaptive Server.

The sequence is kept in a table. There should be one sequence table per table that needs an auto-generated key.

Example:

 create table tab (id int not null primary key, text varchar(100))
 create table tab_sequence (id bigint identity)
 insert into tab_sequence values()
If "cacheSize" is set, the intermediate values are served without querying the database. If the server or your application is stopped or crashes or a transaction is rolled back, the unused values will never be served. The maximum hole size in numbering is consequently the value of cacheSize. HINT: Since Sybase supports the JDBC 3.0 getGeneratedKeys method, it is recommended to use IDENTITY columns directly in the tables and then using a SimpleJdbcInsert or utilizing a KeyHolder when calling the with the update(PreparedStatementCreator psc, KeyHolder generatedKeyHolder) method of the JdbcTemplate.

Thanks to Yinwei Liu for the suggestion!

Since:
2.5.5
Author:
Thomas Risberg

Field Summary
 
Fields inherited from class org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer
paddingLength
 
Constructor Summary
SybaseMaxValueIncrementer()
          Default constructor for bean property style usage.
SybaseMaxValueIncrementer(javax.sql.DataSource dataSource, java.lang.String incrementerName, java.lang.String columnName)
          Convenience constructor.
 
Method Summary
protected  java.lang.String getIncrementStatement()
          Statement to use to increment the "sequence" value.
protected  long getNextKey()
          Determine the next key to use, as a long.
 
Methods inherited from class org.springframework.jdbc.support.incrementer.AbstractColumnMaxValueIncrementer
afterPropertiesSet, getCacheSize, getColumnName, setCacheSize, setColumnName
 
Methods inherited from class org.springframework.jdbc.support.incrementer.AbstractDataFieldMaxValueIncrementer
getDataSource, getIncrementerName, getPaddingLength, nextIntValue, nextLongValue, nextStringValue, setDataSource, setIncrementerName, setPaddingLength
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SybaseMaxValueIncrementer

public SybaseMaxValueIncrementer()
Default constructor for bean property style usage.

See Also:
AbstractDataFieldMaxValueIncrementer.setDataSource(javax.sql.DataSource), AbstractDataFieldMaxValueIncrementer.setIncrementerName(java.lang.String), AbstractColumnMaxValueIncrementer.setColumnName(java.lang.String)

SybaseMaxValueIncrementer

public SybaseMaxValueIncrementer(javax.sql.DataSource dataSource,
                                 java.lang.String incrementerName,
                                 java.lang.String columnName)
Convenience constructor.

Parameters:
dataSource - the DataSource to use
incrementerName - the name of the sequence/table to use
columnName - the name of the column in the sequence table to use
Method Detail

getNextKey

protected long getNextKey()
                   throws DataAccessException
Description copied from class: AbstractDataFieldMaxValueIncrementer
Determine the next key to use, as a long.

Specified by:
getNextKey in class AbstractDataFieldMaxValueIncrementer
Returns:
the key to use as a long. It will eventually be converted later in another format by the public concrete methods of this class.
Throws:
DataAccessException

getIncrementStatement

protected java.lang.String getIncrementStatement()
Statement to use to increment the "sequence" value. Can be overridden by sub-classes.

Returns:
The SQL statement to use

Spring Framework