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Java Source Code / Java Documentation » Database JDBC Connection Pool » HA JDBC » net.sf.hajdbc.sync 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   net.sf.hajdbc.sync.DifferentialSynchronizationStrategy

DifferentialSynchronizationStrategy
public class DifferentialSynchronizationStrategy implements SynchronizationStrategy(Code)
Database-independent synchronization strategy that only updates differences between two databases. This strategy is best used when there are few differences between the active database and the inactive database (i.e. barely out of sync). The following algorithm is used:
  1. Drop the foreign keys on the inactive database (to avoid integrity constraint violations)
  2. For each database table:
    1. Drop the unique constraints on the table (to avoid integrity constraint violations)
    2. Find the primary key(s) of the table
    3. Query all rows in the inactive database table, sorting by the primary key(s)
    4. Query all rows on the active database table
    5. For each row in table:
      1. If primary key of the rows are the same, determine whether or not row needs to be updated
      2. Otherwise, determine whether row should be deleted, or a new row is to be inserted
    6. Re-create the unique constraints on the table (to avoid integrity constraint violations)
  3. Re-create the foreign keys on the inactive database
  4. Synchronize sequences

author:
   Paul Ferraro
version:
   $Revision: 2012 $
since:
   1.0




Method Summary
public  intgetFetchSize()
    
public  intgetMaxBatchSize()
    
public  voidsetFetchSize(int fetchSize)
    
public  voidsetMaxBatchSize(int maxBatchSize)
    
public  voidsynchronize(SynchronizationContext<D> context)
    



Method Detail
getFetchSize
public int getFetchSize()(Code)
the fetchSize.



getMaxBatchSize
public int getMaxBatchSize()(Code)
Returns the maxBatchSize.



setFetchSize
public void setFetchSize(int fetchSize)(Code)

Parameters:
  fetchSize - the fetchSize to set.



setMaxBatchSize
public void setMaxBatchSize(int maxBatchSize)(Code)

Parameters:
  maxBatchSize - The maxBatchSize to set.



synchronize
public void synchronize(SynchronizationContext<D> context) throws SQLException(Code)

See Also:   net.sf.hajdbc.SynchronizationStrategy.synchronize(net.sf.hajdbc.SynchronizationContext)



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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