Examples of org.apache.hadoop.hbase.filter.Filter

org.apache.hadoop.hbase.filter.Filter
Interface for row and column filters directly applied within the regionserver. A filter can expect the following call sequence:
- {@link #reset()}
- {@link #filterAllRemaining()} -> true indicates scan is over, false, keep going on.
- {@link #filterRowKey(byte[],int,int)} -> true to drop this row,if false, we will also call
- {@link #filterKeyValue(KeyValue)} -> true to drop this key/value
- {@link #filterRow(List)} -> allows directmodification of the final list to be submitted
- {@link #filterRow()} -> last chance to drop entire row based on the sequence offilterValue() calls. Eg: filter a row if it doesn't contain a specified column.
Filter instances are created one per region/scan. This interface replaces the old RowFilterInterface. When implementing your own filters, consider inheriting {@link FilterBase} to helpyou reduce boilerplate. @see FilterBase

        throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startAndPrefix));
        addAttributes(scan, attributes);
        Filter f = new WhileMatchFilter(
            new PrefixFilter(getBytes(startAndPrefix)));
        scan.setFilter(f);
        if (columns != null && columns.size() != 0) {
          for(ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));

View Full Code Here

  public void testFilters() throws IOException {
    try {
      this.r = createNewHRegion(REGION_INFO.getTableDesc(), null, null);
      addContent(this.r, HConstants.CATALOG_FAMILY);
      byte [] prefix = Bytes.toBytes("ab");
      Filter newFilter = new PrefixFilter(prefix);
      Scan scan = new Scan();
      scan.setFilter(newFilter);
      rowPrefixFilter(scan);
      RowFilterInterface oldFilter = new PrefixRowFilter(Bytes.toBytes("ab"));
      scan = new Scan();

View Full Code Here

    // Make sure key is of some substance... non-null and > than first key.
    assertTrue(key != null && key.length > 0 &&
      Bytes.BYTES_COMPARATOR.compare(key, new byte [] {'a', 'a', 'a'}) >= 0);
    LOG.info("Key=" + Bytes.toString(key));
    Scan s = startRow == null? new Scan(): new Scan(startRow);
    Filter f = new RowFilter(op, new BinaryComparator(key));
    f = new WhileMatchFilter(f);
    s.setFilter(f);
    return s;
  }

View Full Code Here

      put.add(FAMILY, QUALIFIERS[i], VALUE);
      ht.put(put);
    }
    Scan scan = new Scan();
    scan.addFamily(FAMILY);
    Filter filter = new QualifierFilter(CompareOp.EQUAL,
        new RegexStringComparator("col[1-5]"));
    scan.setFilter(filter);
    ResultScanner scanner = ht.getScanner(scan);
    int expectedIndex = 1;
    for(Result result : ht.getScanner(scan)) {

View Full Code Here

      // Check two things:
      // 1. result list contains expected values
      // 2. result list is sorted properly


      Scan scan = new Scan();
      Filter filter = new SingleColumnValueExcludeFilter(cf_essential, col_normal,
          CompareOp.NOT_EQUAL, filtered_val);
      scan.setFilter(filter);
      scan.setLoadColumnFamiliesOnDemand(true);
      InternalScanner s = region.getScanner(scan);

View Full Code Here

        region.put(put);
      }


      Scan scan = new Scan();
      scan.setLoadColumnFamiliesOnDemand(true);
      Filter bogusFilter = new FilterBase() {
        @Override
        public boolean isFamilyEssential(byte[] name) {
          return Bytes.equals(name, cf_first);
        }
      };

View Full Code Here

        throws IOError, TException {
      try {
        HTable table = getTable(tableName);
        Scan scan = new Scan(getBytes(startAndPrefix));
        addAttributes(scan, attributes);
        Filter f = new WhileMatchFilter(
            new PrefixFilter(getBytes(startAndPrefix)));
        scan.setFilter(f);
        if (columns != null && columns.size() != 0) {
          for(ByteBuffer column : columns) {
            byte [][] famQf = KeyValue.parseColumn(getBytes(column));

View Full Code Here

    servlet.getMetrics().incrementRequests(1);
    byte[] endRow = model.hasEndRow() ? model.getEndRow() : null;
    RowSpec spec = new RowSpec(model.getStartRow(), endRow,
      model.getColumns(), model.getStartTime(), model.getEndTime(), 1);
    try {
      Filter filter = ScannerResultGenerator.buildFilterFromModel(model);
      ScannerResultGenerator gen = 
        new ScannerResultGenerator(actualTableName, spec, filter);
      String id = gen.getID();
      ScannerInstanceResource instance = 
        new ScannerInstanceResource(user, actualTableName, id, gen,

View Full Code Here

      // Check two things:
      // 1. result list contains expected values
      // 2. result list is sorted properly


      Scan scan = new Scan();
      Filter filter = new SingleColumnValueExcludeFilter(cf_essential, col_normal,
                                                         CompareOp.NOT_EQUAL, filtered_val);
      scan.setFilter(filter);
      scan.setLoadColumnFamiliesOnDemand(true);
      InternalScanner s = region.getScanner(scan);

View Full Code Here

        region.put(put);
      }


      Scan scan = new Scan();
      scan.setLoadColumnFamiliesOnDemand(true);
      Filter bogusFilter = new FilterBase() {
        @Override
        public boolean isFamilyEssential(byte[] name) {
          return Bytes.equals(name, cf_first);
        }
        @Override

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.hadoop.hbase.filter.Filter

co.cask.cdap.data2.transaction.queue.coprocessor.hbase94.DequeueScanObserver

co.cask.cdap.data2.transaction.queue.coprocessor.hbase96.DequeueScanObserver

co.cask.tephra.hbase94.coprocessor.TransactionProcessor

co.cask.tephra.hbase94.coprocessor.TransactionVisibilityFilterTest

co.cask.tephra.hbase96.coprocessor.TransactionProcessor

co.cask.tephra.hbase96.coprocessor.TransactionVisibilityFilterTest

co.cask.tephra.hbase98.coprocessor.TransactionProcessor

co.cask.tephra.hbase98.coprocessor.TransactionVisibilityFilterTest

co.nubetech.crux.server.filter.HBaseFilterFactory

com.atlantbh.jmeter.plugins.hbasecomponents.samplers.HBaseScanSampler

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.