/** * Create a new ClientScanner for the specified table Note that the passed {@link Scan}'s start * row maybe changed changed. * * @param conf The {@link Configuration} to use. * @param scan {@link Scan} to use in this scanner * @param tableName The table that we wish to scan * @param connection Connection identifying the cluster * @throws IOException */ public ClientScanner( final Configuration conf, final Scan scan, final TableName tableName, ClusterConnection connection, RpcRetryingCallerFactory rpcFactory, RpcControllerFactory controllerFactory, ExecutorService pool, int primaryOperationTimeout) throws IOException { if (LOG.isTraceEnabled()) { LOG.trace( "Scan table=" + tableName + ", startRow=" + Bytes.toStringBinary(scan.getStartRow())); } this.scan = scan; this.tableName = tableName; this.lastNext = System.currentTimeMillis(); this.connection = connection; this.pool = pool; this.primaryOperationTimeout = primaryOperationTimeout; this.retries = conf.getInt( HConstants.HBASE_CLIENT_RETRIES_NUMBER, HConstants.DEFAULT_HBASE_CLIENT_RETRIES_NUMBER); if (scan.getMaxResultSize() > 0) { this.maxScannerResultSize = scan.getMaxResultSize(); } else { this.maxScannerResultSize = conf.getLong( HConstants.HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE_KEY, HConstants.DEFAULT_HBASE_CLIENT_SCANNER_MAX_RESULT_SIZE); } this.scannerTimeout = HBaseConfiguration.getInt( conf, HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, HConstants.HBASE_REGIONSERVER_LEASE_PERIOD_KEY, HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD); // check if application wants to collect scan metrics initScanMetrics(scan); // Use the caching from the Scan. If not set, use the default cache setting for this table. if (this.scan.getCaching() > 0) { this.caching = this.scan.getCaching(); } else { this.caching = conf.getInt( HConstants.HBASE_CLIENT_SCANNER_CACHING, HConstants.DEFAULT_HBASE_CLIENT_SCANNER_CACHING); } this.caller = rpcFactory.<Result[]>newCaller(); this.rpcControllerFactory = controllerFactory; this.conf = conf; initializeScannerInConstruction(); }