Examples of org.apache.accumulo.core.iterators.system.SourceSwitchingIterator

Package org.apache.accumulo.core.iterators.system

Examples of org.apache.accumulo.core.iterators.system.SourceSwitchingIterator

org.apache.accumulo.core.iterators.system.SourceSwitchingIterator
A SortedKeyValueIterator which presents a view over some section of data, regardless of whether or not it is backed by memory (InMemoryMap) or an RFile (InMemoryMap that was minor compacted to a file). Clients reading from a table that has data in memory should not see interruption in their scan when that data is minor compacted. This iterator is designed to manage this behind the scene.

    put(tm1, "r1", "cf1", "cq1", 5, "v1");
    put(tm1, "r1", "cf1", "cq2", 5, "v2");
    
    SortedMapIterator smi = new SortedMapIterator(tm1);
    TestDataSource tds = new TestDataSource(smi);
    SourceSwitchingIterator ssi = new SourceSwitchingIterator(tds, false);
    
    SortedKeyValueIterator<Key,Value> dc1 = ssi.deepCopy(null);
    
    TreeMap<Key,Value> tm2 = new TreeMap<Key,Value>();
    put(tm2, "r1", "cf1", "cq1", 6, "v3");
    put(tm2, "r2", "cf1", "cq2", 6, "v4");
    
    SortedMapIterator smi2 = new SortedMapIterator(tm2);
    TestDataSource tds2 = new TestDataSource(smi2);
    tds.setNext(tds2);
    
    ssi.switchNow();
    
    ssi.seek(new Range("r1"), new ArrayList<ByteSequence>(), false);
    dc1.seek(new Range("r2"), new ArrayList<ByteSequence>(), false);
    
    ane(ssi, "r1", "cf1", "cq1", 6, "v3", true);
    assertFalse(ssi.hasTop());
    ane(dc1, "r2", "cf1", "cq2", 6, "v4", true);
    assertFalse(dc1.hasTop());
  }

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        SortedKeyValueIterator<Key,Value> iter;
        
        if (options.isolated) {
          if (isolatedIter == null)
            isolatedIter = new SourceSwitchingIterator(dataSource, true);
          else
            isolatedDataSource.fileManager.reattach();
          iter = isolatedIter;
        } else {
          iter = new SourceSwitchingIterator(dataSource, false);
        }
        
        results = nextBatch(iter, range, options.num, options.columnSet);
        
        if (results.results == null) {

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    if (deleted)
      throw new IllegalStateException("Can not obtain iterator after map deleted");
    
    int mc = mutationCount.get();
    MemoryDataSource mds = new MemoryDataSource();
    SourceSwitchingIterator ssi = new SourceSwitchingIterator(new MemoryDataSource());
    MemoryIterator mi = new MemoryIterator(new ColumnFamilySkippingIterator(new PartialMutationSkippingIterator(ssi, mc)));
    mi.setSSI(ssi);
    mi.setMDS(mds);
    activeIters.add(mi);
    return mi;

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    }
    
    ScanDataSource dataSource = new ScanDataSource(authorizations, this.defaultSecurityLabel, columns, ssiList, ssio, interruptFlag);
    
    try {
      SortedKeyValueIterator<Key,Value> iter = new SourceSwitchingIterator(dataSource);
      return lookup(iter, ranges, columns, results, maxResultSize);
    } catch (IOException ioe) {
      dataSource.close(true);
      throw ioe;
    } finally {

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    ScanDataSource dataSource = new ScanDataSource(authorizations, this.defaultSecurityLabel, columns, ssiList, ssio, interruptFlag);
    
    LookupResult result = null;


    try {
      SortedKeyValueIterator<Key,Value> iter = new SourceSwitchingIterator(dataSource);
      result = lookup(iter, ranges, columns, results, maxResultSize);
      return result;
    } catch (IOException ioe) {
      dataSource.close(true);
      throw ioe;

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        SortedKeyValueIterator<Key,Value> iter;
        
        if (options.isolated) {
          if (isolatedIter == null)
            isolatedIter = new SourceSwitchingIterator(dataSource, true);
          else
            isolatedDataSource.fileManager.reattach();
          iter = isolatedIter;
        } else {
          iter = new SourceSwitchingIterator(dataSource, false);
        }
        
        results = nextBatch(iter, range, options.num, options.columnSet);
        
        if (results.results == null) {

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Related Classes of org.apache.accumulo.core.iterators.system.SourceSwitchingIterator

org.apache.accumulo.core.data.Key

org.apache.accumulo.core.data.Range

org.apache.accumulo.core.data.Value

org.apache.accumulo.core.iterators.system.SourceSwitchingIteratorTest

org.apache.accumulo.server.tabletserver.FileManager$ScanFileManager

org.apache.accumulo.server.tabletserver.InMemoryMap

org.apache.accumulo.server.tabletserver.Tablet

org.apache.accumulo.server.tabletserver.Tablet$Scanner

org.apache.accumulo.tserver.FileManager$ScanFileManager

org.apache.accumulo.tserver.InMemoryMap

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