use of org.apache.cassandra.index.sasi.plan.QueryController in project cassandra by apache.
the class SASIIndexTest method testIndexMemtableSwitching.
@Test
public void testIndexMemtableSwitching() throws Exception {
// write some data but don't flush
ColumnFamilyStore store = loadData(new HashMap<String, Pair<String, Integer>>() {
{
put("key1", Pair.create("Pavel", 14));
}
}, false);
ColumnIndex index = ((SASIIndex) store.indexManager.getIndexByName(store.name + "_first_name")).getIndex();
IndexMemtable beforeFlushMemtable = index.getCurrentMemtable();
PartitionRangeReadCommand command = PartitionRangeReadCommand.create(store.metadata(), FBUtilities.nowInSeconds(), ColumnFilter.all(store.metadata()), RowFilter.NONE, DataLimits.NONE, DataRange.allData(store.getPartitioner()));
QueryController controller = new QueryController(store, command, Integer.MAX_VALUE);
org.apache.cassandra.index.sasi.plan.Expression expression = new org.apache.cassandra.index.sasi.plan.Expression(controller, index).add(Operator.LIKE_MATCHES, UTF8Type.instance.fromString("Pavel"));
Assert.assertTrue(rangesSize(beforeFlushMemtable, expression) > 0);
store.forceBlockingFlush();
IndexMemtable afterFlushMemtable = index.getCurrentMemtable();
Assert.assertNotSame(afterFlushMemtable, beforeFlushMemtable);
Assert.assertEquals(rangesSize(afterFlushMemtable, expression), 0);
Assert.assertEquals(0, index.getPendingMemtables().size());
loadData(new HashMap<String, Pair<String, Integer>>() {
{
put("key2", Pair.create("Sam", 15));
}
}, false);
expression = new org.apache.cassandra.index.sasi.plan.Expression(controller, index).add(Operator.LIKE_MATCHES, UTF8Type.instance.fromString("Sam"));
beforeFlushMemtable = index.getCurrentMemtable();
Assert.assertTrue(rangesSize(beforeFlushMemtable, expression) > 0);
// let's emulate switching memtable and see if we can still read-data in "pending"
index.switchMemtable(store.getTracker().getView().getCurrentMemtable());
Assert.assertNotSame(index.getCurrentMemtable(), beforeFlushMemtable);
Assert.assertEquals(1, index.getPendingMemtables().size());
Assert.assertTrue(rangesSize(index, expression) > 0);
// emulate "everything is flushed" notification
index.discardMemtable(store.getTracker().getView().getCurrentMemtable());
Assert.assertEquals(0, index.getPendingMemtables().size());
Assert.assertEquals(rangesSize(index, expression), 0);
// test discarding data from memtable
loadData(new HashMap<String, Pair<String, Integer>>() {
{
put("key3", Pair.create("Jonathan", 16));
}
}, false);
expression = new org.apache.cassandra.index.sasi.plan.Expression(controller, index).add(Operator.LIKE_MATCHES, UTF8Type.instance.fromString("Jonathan"));
Assert.assertTrue(rangesSize(index, expression) > 0);
index.switchMemtable();
Assert.assertEquals(rangesSize(index, expression), 0);
}
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