Package org.pentaho.di.core

Class DBCache

java.lang.Object
org.pentaho.di.core.DBCache
public class DBCache extends Object
This class caches database queries so that the same query doesn't get called twice. Queries are often launched to the databases to get information on tables etc.
Since:
15-01-04
Author:
Matt

  • Method Details

    • setActive

      public void setActive()

    • setInactive

      public void setInactive()

    • setActive

      public void setActive(boolean act)

    • isActive

      public boolean isActive()

    • put

      public void put(DBCacheEntry entry, RowMetaInterface fields)

    • get

      public RowMetaInterface get(DBCacheEntry entry)
      Get the fields as a row generated by a database cache entry
      Parameters:
      entry - the entry to look for
      Returns:
      the fields as a row generated by a database cache entry

    • size

      public int size()

    • clear

      public void clear(String dbname)
      Clear out all entries of database with a certain name
      Parameters:
      dbname - The name of the database for which we want to clear the cache or null if we want to clear it all.

    • getFilename

      public static String getFilename()

    • saveCache

      public void saveCache() throws KettleFileException
      Throws:
      KettleFileException

    • getInstance

      public static DBCache getInstance()
      Create the database cache instance by loading it from disk
      Returns:
      the database cache instance.