Examples of org.sf.mustru.utils.DbTools

org.sf.mustru.utils.DbTools
A collection of methods to manage the Berkeley database.
- closeDB Close the current primary database
- closeEnv Release all environment resources
- closeSecDB Close the current sec. database
- createDB Create a primary database with optional duplicate flag parms
- createSecDB Create a sec. database
- delete Delete an entry from the database
- dropDB Drop the primary database
- dropSecDB Drop the secondary database
- exists Check if an entry exists with the specified key
- existsDB Check if a database exists with passed name
- fetch Fetch an entry with specified key
- fetchArray Fetch an array of entries with a partial key
- fetchSec Fetch an entry with the specified sec. key
- fetchSecArray Fetch an array of sec. entries with a partial sec. key
- getNextKey Get the next key for the database
- insert Add an entry to the database
- openDB Open the primary database
- openEnv Open an environment
- update Update the database with new entry

       throw new RuntimeException("Cannot run two instances of CrawlManager"); }


   //*-- instantiate a new crawl
   ctRef = new CrawlManager();
   if (Constants.getDbt() == null)
   { DbTools dbt = new DbTools(); 
     dbt.openEnv(Constants.getDBDIR(), false); Constants.setDbt(dbt);
   }
  return(ctRef);
 }

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    catch (IOException ie) { logger.error("IO Error: Could not read spell train file " + ie.getMessage()); }
    catch (ClassNotFoundException ce) { logger.error("Class error: " + ce.getMessage()); }
  }
  
  //*-- Create the databases, if necessary
  DbTools dbt = Constants.getDbt();
  boolean createFlag = true; boolean dupFlag = false;  
  if (freshCrawl) 
  { 
   //*-- initialize and create a new database for the list of extracted files and a secondary 
   //*-- database for the file signature
   dbt.dropDB(Constants.EXT_FILES_DB); 
   dbt.createDB(Constants.EXT_FILES_DB, createFlag, dupFlag); 
   logger.info("Created py. database " + Constants.EXT_FILES_DB);
   dbt.dropSecDB(Constants.EXT_FILES_SECDB);
   SecKeyDoc skd = new SecKeyDoc( new IndexableDoc().getBdbBinding() );
   if (dbt.createSecDB(Constants.EXT_FILES_SECDB, false, skd)) 
    logger.info("Created sec. database " + Constants.EXT_FILES_SECDB);
   dbt.closeSecDB(); dbt.closeDB();


   //*-- create the messages database
   dbt.dropDB(Constants.EXT_MESSAGES_DB); 
   dbt.createDB(Constants.EXT_MESSAGES_DB, createFlag, dupFlag); 
   logger.info("Created py. database " + Constants.EXT_MESSAGES_DB);
   dbt.closeDB();


  }


  //*-- initialize the timer hash
  timers = Constants.getTIMERS();

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 //*-- create the database environment
 private void createDbEnv()
 {
  //*-- create the database environment in the Constants
  if (Constants.getDbt() != null) Constants.getDbt().closeEnv();
  DbTools dbt = new DbTools(); 
  if (Constants.getDBDIR().length() > 0) dbt.openEnv(Constants.getDBDIR(), false); 
  Constants.setDbt(dbt);
 }

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  //*-- set the index and database directories
  CrawlConfig crawlConfig = new CrawlConfig(false);   //*-- initialize from the properties file
  Constants.setDBDIR( crawlConfig.getDbDir() ); Constants.setINDEXDIR( crawlConfig.getIndexDir() );


  //*-- Create the Berkeley DB environment for read only access
  dbt = new DbTools(); dbt.openEnv(Constants.getDBDIR(), true); 
  Constants.setDbt(dbt);
  
  try { is = SearchTools.getSearcher(Constants.getINDEXDIR(), false); }
  catch (IOException ie) { logger.error("IO Error " + ie.getMessage() ); }

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com.sleepycat.je.DatabaseConfig

com.sleepycat.je.DatabaseEntry

com.sleepycat.je.Environment

com.sleepycat.je.EnvironmentConfig

com.sleepycat.je.OperationStatus

com.sleepycat.je.SecondaryConfig

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