Package org.teiid.query.processor

Source Code of org.teiid.query.processor.TestQueryProcessor

/*
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* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.  Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/

package org.teiid.query.processor;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;

import org.teiid.common.buffer.BlockedException;
import org.teiid.common.buffer.BufferManager;
import org.teiid.common.buffer.BufferManagerFactory;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.common.buffer.TupleBuffer;
import org.teiid.common.buffer.TupleSource;
import org.teiid.core.TeiidException;
import org.teiid.query.processor.BatchCollector;
import org.teiid.query.processor.QueryProcessor;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.util.CommandContext;

import junit.framework.TestCase;


/**
*/
public class TestQueryProcessor extends TestCase {

    /**
     * Constructor for TestQueryProcessor.
     * @param name
     */
    public TestQueryProcessor(String name) {
        super(name);
    }
   
    public void helpTestProcessor(FakeProcessorPlan plan, long timeslice, List[] expectedResults) throws TeiidException {
        BufferManager bufferMgr = BufferManagerFactory.getStandaloneBufferManager();
        FakeDataManager dataManager = new FakeDataManager();

        CommandContext context = new CommandContext("pid", "group", null, null, 1); //$NON-NLS-1$ //$NON-NLS-2$
        QueryProcessor processor = new QueryProcessor(plan, context, bufferMgr, dataManager);
        BatchCollector collector = processor.createBatchCollector();
        TupleBuffer tsID = null;
        while(true) {
            try {
                tsID = collector.collectTuples();        
                break;
            } catch(BlockedException e) {
            }
        }
       
        // Compare # of rows in actual and expected
        assertEquals("Did not get expected # of rows", expectedResults.length, tsID.getRowCount()); //$NON-NLS-1$
       
        // Compare actual with expected results
        TupleSource actual = tsID.createIndexedTupleSource();
        if(expectedResults.length > 0) {
            for(int i=0; i<expectedResults.length; i++) {
                List actRecord = actual.nextTuple();
                List expRecord = expectedResults[i];                   
                assertEquals("Did not match row at row index " + i, expRecord, actRecord); //$NON-NLS-1$
            }
        }
        tsID.remove();
    }
   
    public void testNoResults() throws Exception {
        List elements = new ArrayList();
        elements.add(new ElementSymbol("a")); //$NON-NLS-1$
        FakeProcessorPlan plan = new FakeProcessorPlan(elements, null);
        helpTestProcessor(plan, 1000, new List[0]);   
    }

    public void testBlockNoResults() throws Exception {
        List elements = new ArrayList();
        elements.add(new ElementSymbol("a")); //$NON-NLS-1$
       
        List batches = new ArrayList();
        batches.add(BlockedException.INSTANCE);
        TupleBatch batch = new TupleBatch(1, new List[0]);
        batch.setTerminationFlag(true);
        batches.add(batch);
       
        FakeProcessorPlan plan = new FakeProcessorPlan(elements, batches);
        helpTestProcessor(plan, 1000, new List[0]);   
    }
   
    public void testProcessWithOccasionalBlocks() throws Exception {
        List elements = new ArrayList();
        elements.add(new ElementSymbol("a")); //$NON-NLS-1$
               
        HashSet blocked = new HashSet(Arrays.asList(new Integer[] { new Integer(0), new Integer(2), new Integer(7) }));
        int numBatches = 10;
        int batchRow = 1;       
        int rowsPerBatch = 50;
        List[] expectedResults = new List[rowsPerBatch*(numBatches-blocked.size())];
        List batches = new ArrayList();
        for(int b=0; b<numBatches; b++) {
            if(blocked.contains(new Integer(b))) {
                batches.add(BlockedException.INSTANCE);
            } else {   
                List[] rows = new List[rowsPerBatch];
                for(int i=0; i<rowsPerBatch; i++) {
                    rows[i] = new ArrayList();
                    rows[i].add(new Integer(batchRow));
                    expectedResults[batchRow-1] = rows[i];
                    batchRow++;
                }
                                               
                TupleBatch batch = new TupleBatch(batchRow-rows.length, rows);
                if(b == numBatches-1) {
                    batch.setTerminationFlag(true);
                }
                batches.add(batch);
            }
        }
       
        FakeProcessorPlan plan = new FakeProcessorPlan(elements, batches);
        helpTestProcessor(plan, 1000, expectedResults);                   
    }
}
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