Examples of com.sleepycat.je.DatabaseConfig

com.sleepycat.je.DatabaseConfig

Specifies the attributes of a database.

There are two groups of database attributes: per-database handle attributes, and database-wide attributes. An attribute may be persistent/transient or mutable/immutable:

Scope	Mutable	Persistent	Attribute
Database-wide attribute	True	True	{@link DatabaseConfig#getBtreeComparator() btree comparator} {@link DatabaseConfig#getDuplicateComparator() duplicate comparator} {@link DatabaseConfig#getKeyPrefixing() key prefixing} {@link DatabaseConfig#getNodeMaxEntries() nodeMaxEntries}
	True	False	{@link DatabaseConfig#getDeferredWrite() deferred write} {@link DatabaseConfig#getTransactional() transactional}
	False	True	{@link DatabaseConfig#getSortedDuplicates() sorted duplicates}
	False	False	{@link DatabaseConfig#getTemporary() temporary}
Per-database handle attributes	False	False	{@link DatabaseConfig#getAllowCreate() allow create} {@link DatabaseConfig#getExclusiveCreate() exclusive create} {@link DatabaseConfig#getReadOnly() read only} {@link DatabaseConfig#getUseExistingConfig() use existing config}

Persistent attributes will be saved in the log and remain in effect every time the environment is reopened. Transient attributes only remain in effect until:

the database configuration is updated
the database handle(per-database handle attributes) is closed, or all handles for this database (database-wide attributes) are closed.

      loader.create();
      loader.start();


      /* Verify the database name by trying to open it. */
      Environment env = new Environment(new File(envHome), null);
      DatabaseConfig dbConfig = new DatabaseConfig();
      dbConfig.setTransactional(transactional);
      Database db = env.openDatabase(null, dbName, dbConfig);
      db.close();
      env.close();
   }

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  protected Object mutex = "WorkQueues_Mutex";


  public WorkQueues(Environment env, String dbName, boolean resumable) throws DatabaseException {
    this.env = env;
    this.resumable = resumable;
    DatabaseConfig dbConfig = new DatabaseConfig();
    dbConfig.setAllowCreate(true);
    dbConfig.setTransactional(resumable);
    dbConfig.setDeferredWrite(!resumable);
    urlsDB = env.openDatabase(null, dbName, dbConfig);
    webURLBinding = new WebURLTupleBinding();
  }

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  { 
   //*-- open the environment
   if (env == null)  { openEnv(DBDIR, false); if (env == null) return false; }


   //*-- create the primary database handle
   DatabaseConfig dbconfig = new DatabaseConfig();
   dbconfig.setAllowCreate(true);        //*-- allow creation of database  
   dbconfig.setSortedDuplicates(dupFlag);     //*-- no dups
   dbconfig.setExclusiveCreate(createFlag);   //*-- if true, disallow opening of an existing database 
   dbconfig.setReadOnly(false);          //*-- set r/w status of the database 
   //dbconfig.setTransactional(true); 
   currentDB = env.openDatabase(null, dbname, dbconfig);
   dbMap.put(dbname, currentDB );
  }
  catch (DatabaseException dbe)

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   //*-- check for errors and open the environment
   if ( (dbname.equals("")) || (!(existsDB(dbname))) ) return false;
   if (env != null) { openEnv(DBDIR, readOnly); if (env == null) return false; }


   //*-- create the primary database handle
   DatabaseConfig dbconfig = new DatabaseConfig();
   dbconfig.setAllowCreate(false);      //*-- disallow creation of database  
   dbconfig.setSortedDuplicates(dupFlag);     //*-- flag for dups
   dbconfig.setExclusiveCreate(readOnly);     //*-- allow opening of an existing database 
   dbconfig.setReadOnly(readOnly);      //*-- set r/w status of the database 
   // dbconfig.setTransactional(true);
   currentDB = env.openDatabase(null, dbname, dbconfig);
   dbMap.put(dbname, currentDB );
  }
  catch (DatabaseException dbe) { logger.error("Failed to open DB " + dbname + " " + dbe.getMessage() ); return false; }

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                    files[i].delete();
            }
        }


        EnvironmentConfig envConfig = new EnvironmentConfig();
        DatabaseConfig dbConfig = new DatabaseConfig();


        envConfig.setTransactional(true);
        envConfig.setAllowCreate(true);
        dbConfig.setAllowCreate(true);
        dbConfig.setTransactional(true);


        env = new Environment(dbHome, envConfig);


        Transaction txn = null;

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    @Override
    public void performUpgrade(Environment environment, UpgradeInteractionHandler handler, String virtualHostName)
            throws DatabaseException, AMQStoreException
    {
        reportStarting(environment, 6);
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setTransactional(true);
        dbConfig.setAllowCreate(true);


        Database versionDb = environment.openDatabase(null, "CONFIG_VERSION", dbConfig);


        if(versionDb.count() == 0L)
        {

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    }


    public void upgradeIfNecessary() throws AMQStoreException
    {
        boolean isEmpty = _environment.getDatabaseNames().isEmpty();
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setTransactional(true);
        dbConfig.setAllowCreate(true);


        Database versionDb = null;
        try
        {
            versionDb = _environment.openDatabase(null, VERSION_DB_NAME, dbConfig);

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        _upgrader = new Upgrader(_environment, getVirtualHostName());
    }


    private int getStoreVersion()
    {
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setTransactional(true);
        dbConfig.setAllowCreate(true);
        int storeVersion = -1;
        Database versionDb = null;
        Cursor cursor = null;
        try
        {

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        environmentConfig.setAllowCreate(true);
        environmentConfig.setTransactional(true);
        environmentConfig.setSharedCache(false);
        environmentConfig.setCacheSize(CACHE_SIZE);


        DatabaseConfig databaseConfig = new DatabaseConfig();
        databaseConfig.setAllowCreate(true);
        databaseConfig.setTransactional(true);
        databaseConfig.setSortedDuplicates(true);


        long maxCacheSize = getMaxCacheUsage(environmentConfig, databaseConfig);


        assertEquals("MaxCacheSize > CACHE_SIZE", true, maxCacheSize > CACHE_SIZE);
        assertEquals("MaxCacheSize < 2 * CACHE_SIZE", true, maxCacheSize < 2 * CACHE_SIZE);

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        environmentConfig.setAllowCreate(true);
        environmentConfig.setTransactional(true);
        environmentConfig.setSharedCache(true);
        environmentConfig.setCacheSize(CACHE_SIZE);


        DatabaseConfig databaseConfig = new DatabaseConfig();
        databaseConfig.setAllowCreate(true);
        databaseConfig.setTransactional(true);
        databaseConfig.setSortedDuplicates(true);


        long maxCacheSize = getMaxCacheUsage(environmentConfig, databaseConfig);
        // Include a buffer of 1mb.. since the actual cache usage can be a few
        // bytes more
        assertEquals("MaxCacheSize" + maxCacheSize + " <= CACHE_SIZE:" + CACHE_SIZE,

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