Examples of HBaseQualifierPager

org.kiji.schema.impl.hbase.HBaseQualifierPager
Pages through the many qualifiers of a map-type family.
The max-versions parameter on a map-type family applies on a per-qualifier basis. This does not limit the total number of versions returned for the entire map-type family.

Examples of org.kiji.schema.impl.hbase.HBaseQualifierPager

    final KijiDataRequest dataRequest = KijiDataRequest.builder()
        .addColumns(ColumnsDef.create()
            .withMaxVersions(HConstants.ALL_VERSIONS).withPageSize(pageSize).addFamily("jobs"))
        .build();


    final HBaseQualifierPager pager =
        new HBaseQualifierPager(
            eid, dataRequest, (HBaseKijiTable) mTable, KijiColumnName.create("jobs"));
    try {
      assertTrue(pager.hasNext());


      final List<String> qualifiers = Lists.newArrayList();
      int npage = 0;
      while (pager.hasNext()) {
        // Note: we cannot validate individual pages as their boundaries depend on HBase version.
        final List<String> page = Lists.newArrayList(pager.next());
        LOG.info("Page #{}: {}", npage, page);
        assertTrue(page.size() <= pageSize);
        qualifiers.addAll(page);
        npage++;
      }


      final List<String> expected = Lists.newArrayList("j0", "j1", "j2", "j3", "j4");
      assertTrue(npage >= 3);  // at least 3 pages
      assertEquals(expected, qualifiers);


      assertFalse(pager.hasNext());
      try {
        pager.next();
        Assert.fail("next() should throw NoSuchElementException");
      } catch (NoSuchElementException nsee) {
        // Expected
      }
    } finally {
      pager.close();
    }
  }

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Examples of org.kiji.schema.impl.hbase.HBaseQualifierPager

            .withPageSize(pageSize)
            .withFilter(new KijiColumnRangeFilter("j12", true, "j13", true))
            .addFamily("jobs"))
        .build();


    final HBaseQualifierPager pager =
        new HBaseQualifierPager(
            eid, dataRequest, (HBaseKijiTable) mTable, KijiColumnName.create("jobs"));
    try {
      assertTrue(pager.hasNext());
      assertArrayEquals(new String[]{}, pager.next());
      assertFalse(pager.hasNext());
      try {
        pager.next();
        Assert.fail("next() should throw NoSuchElementException");
      } catch (NoSuchElementException nsee) {
        // Expected
      }
    } finally {
      pager.close();
    }
  }

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Examples of org.kiji.schema.impl.hbase.HBaseQualifierPager

            .withPageSize(pageSize)
            .withFilter(new KijiColumnRangeFilter("j1", true, "j2", true))
            .addFamily("jobs"))
        .build();


    final HBaseQualifierPager pager =
        new HBaseQualifierPager(
            eid, dataRequest, (HBaseKijiTable) mTable, KijiColumnName.create("jobs"));
    try {
      assertTrue(pager.hasNext());


      final List<String> qualifiers = Lists.newArrayList();
      int npage = 0;
      while (pager.hasNext()) {
        // Note: we cannot validate individual pages as their boundaries depend on HBase version.
        final List<String> page = Lists.newArrayList(pager.next());
        LOG.info("Page #{}: {}", npage, page);
        assertTrue(page.size() <= pageSize);
        qualifiers.addAll(page);
        npage++;
      }


      final List<String> expected = Lists.newArrayList("j1", "j2");
      assertTrue(npage >= 1);  // at least 1 page
      assertEquals(expected, qualifiers);


      assertFalse(pager.hasNext());
      try {
        pager.next();
        Assert.fail("next() should throw NoSuchElementException");
      } catch (NoSuchElementException nsee) {
        // Expected
      }
    } finally {
      pager.close();
    }
  }

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Examples of org.kiji.schema.impl.hbase.HBaseQualifierPager

            .withPageSize(pageSize)
            .withFilter(new KijiColumnRangeFilter("j1", true, null, true))
            .addFamily("jobs"))
        .build();


    final HBaseQualifierPager pager =
        new HBaseQualifierPager(
            eid, dataRequest, (HBaseKijiTable) mTable, KijiColumnName.create("jobs"));
    try {
      assertTrue(pager.hasNext());


      final List<String> qualifiers = Lists.newArrayList();
      int npage = 0;
      while (pager.hasNext()) {
        // Note: we cannot validate individual pages as their boundaries depend on HBase version.
        final List<String> page = Lists.newArrayList(pager.next());
        LOG.info("Page #{}: {}", npage, page);
        assertTrue(page.size() <= pageSize);
        qualifiers.addAll(page);
        npage++;
      }


      final List<String> expected = Lists.newArrayList("j1", "j2", "j3", "j4");
      assertTrue(npage >= 2);  // at least 2 pages
      assertEquals(expected, qualifiers);


      assertFalse(pager.hasNext());
      try {
        pager.next();
        Assert.fail("next() should throw NoSuchElementException");
      } catch (NoSuchElementException nsee) {
        // Expected
      }
    } finally {
      pager.close();
    }
  }

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