Examples of org.apache.cassandra.db.filter.QueryPath

org.apache.cassandra.db.filter.QueryPath

        Table table = Table.open("Keyspace1");
        ColumnFamilyStore cfs = table.getColumnFamilyStore("Standard1");


        ByteBuffer key = ByteBufferUtil.bytes("k");
        RowMutation rm = new RowMutation("Keyspace1", key);
        rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("c")), ByteBufferUtil.EMPTY_BYTE_BUFFER, 0);
        rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("d")), ByteBufferUtil.EMPTY_BYTE_BUFFER, 0);
        rm.apply();
        cfs.forceBlockingFlush();


        rm.apply();
        cfs.forceBlockingFlush();

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        final int ROWS_PER_SSTABLE = 10;
        for (int j = 0; j < (DatabaseDescriptor.getIndexInterval() * 3) / ROWS_PER_SSTABLE; j++) {
            for (int i = 0; i < ROWS_PER_SSTABLE; i++) {
                ByteBuffer key = ByteBufferUtil.bytes(String.valueOf(i % 2));
                RowMutation rm = new RowMutation("Keyspace1", key);
                rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes(String.valueOf(i / 2))), ByteBufferUtil.EMPTY_BYTE_BUFFER, j * ROWS_PER_SSTABLE + i);
                rm.apply();
            }
            cfs.forceBlockingFlush();
        }

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        ColumnFamilyStore cfs = table.getColumnFamilyStore("Super5");


        ByteBuffer key = ByteBufferUtil.bytes("k");
        RowMutation rm = new RowMutation("Keyspace4", key);
        ByteBuffer scKey = ByteBuffer.wrap(UUIDGen.decompose(UUIDGen.makeType1UUIDFromHost(FBUtilities.getLocalAddress())));
        rm.add(new QueryPath("Super5", scKey , ByteBufferUtil.bytes("c")), ByteBufferUtil.EMPTY_BYTE_BUFFER, 0);
        rm.apply();
        cfs.forceBlockingFlush();


        rm.apply();
        cfs.forceBlockingFlush();

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        File tempSS = tempSSTableFile("Keyspace1", "Standard1");
        ColumnFamily cfamily = ColumnFamily.create("Keyspace1", "Standard1");
        SSTableWriter writer = new SSTableWriter(tempSS.getPath(), 2);
        
        // Add rowA
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("colA")), ByteBufferUtil.bytes("valA"), System.currentTimeMillis());
        writer.append(Util.dk("rowA"), cfamily);
        cfamily.clear();
        
        // Add rowB
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("colB")), ByteBufferUtil.bytes("valB"), System.currentTimeMillis());
        writer.append(Util.dk("rowB"), cfamily);
        cfamily.clear();
     
        writer.closeAndOpenReader();

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        ColumnFamily cfamily = ColumnFamily.create("Keyspace1", "Standard1");
        SSTableWriter writer = new SSTableWriter(tempSS.getPath(), 2);
        
        int nowInSec = (int)(System.currentTimeMillis() / 1000) + 42; //live for 42 seconds
        // Add rowA
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("colA")), ByteBufferUtil.bytes("valA"), System.currentTimeMillis());
        cfamily.addColumn(null, new ExpiringColumn(ByteBufferUtil.bytes("colExp"), ByteBufferUtil.bytes("valExp"), System.currentTimeMillis(), 42, nowInSec));
        writer.append(Util.dk("rowA"), cfamily);
        cfamily.clear();
        
        // Add rowB
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("colB")), ByteBufferUtil.bytes("valB"), System.currentTimeMillis());
        writer.append(Util.dk("rowB"), cfamily);
        cfamily.clear();


        // Add rowExclude
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("colX")), ByteBufferUtil.bytes("valX"), System.currentTimeMillis());
        writer.append(Util.dk("rowExclude"), cfamily);
        cfamily.clear();


        SSTableReader reader = writer.closeAndOpenReader();

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        File tempSS = tempSSTableFile("Keyspace1", "Super4");
        ColumnFamily cfamily = ColumnFamily.create("Keyspace1", "Super4");
        SSTableWriter writer = new SSTableWriter(tempSS.getPath(), 2);
        
        // Add rowA
        cfamily.addColumn(new QueryPath("Super4", ByteBufferUtil.bytes("superA"), ByteBufferUtil.bytes("colA")), ByteBufferUtil.bytes("valA"), System.currentTimeMillis());
        writer.append(Util.dk("rowA"), cfamily);
        cfamily.clear();
        
        // Add rowB
        cfamily.addColumn(new QueryPath("Super4", ByteBufferUtil.bytes("superB"), ByteBufferUtil.bytes("colB")), ByteBufferUtil.bytes("valB"), System.currentTimeMillis());
        writer.append(Util.dk("rowB"), cfamily);
        cfamily.clear();


        // Add rowExclude
        cfamily.addColumn(new QueryPath("Super4", ByteBufferUtil.bytes("superX"), ByteBufferUtil.bytes("colX")), ByteBufferUtil.bytes("valX"), System.currentTimeMillis());
        writer.append(Util.dk("rowExclude"), cfamily);
        cfamily.clear();


        SSTableReader reader = writer.closeAndOpenReader();

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        assert DatabaseDescriptor.getTableDefinition(ks).cfMetaData().get(newCf.cfName).equals(newCf);


        // now read and write to it.
        DecoratedKey dk = Util.dk("key0");
        RowMutation rm = new RowMutation(ks, dk.key);
        rm.add(new QueryPath(cf, null, ByteBufferUtil.bytes("col0")), ByteBufferUtil.bytes("value0"), 1L);
        rm.apply();
        ColumnFamilyStore store = Table.open(ks).getColumnFamilyStore(cf);
        assert store != null;
        store.forceBlockingFlush();
        
        ColumnFamily cfam = store.getColumnFamily(QueryFilter.getNamesFilter(dk, new QueryPath(cf), ByteBufferUtil.bytes("col0")));
        assert cfam.getColumn(ByteBufferUtil.bytes("col0")) != null;
        IColumn col = cfam.getColumn(ByteBufferUtil.bytes("col0"));
        assert ByteBufferUtil.bytes("value0").equals(col.value());
    }

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        File tempSS = tempSSTableFile("Keyspace1", "Standard1");
        ColumnFamily cfamily = ColumnFamily.create("Keyspace1", "Standard1");
        SSTableWriter writer = new SSTableWriter(tempSS.getPath(), 2);
        
        // Add rowA
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("name")), ByteBufferUtil.bytes("val"), System.currentTimeMillis());
        writer.append(Util.dk("rowA"), cfamily);
        cfamily.clear();


        // Add rowExclude
        cfamily.addColumn(new QueryPath("Standard1", null, ByteBufferUtil.bytes("name")), ByteBufferUtil.bytes("val"), System.currentTimeMillis());
        writer.append(Util.dk("rowExclude"), cfamily);
        cfamily.clear();


        SSTableReader reader = writer.closeAndOpenReader();
        
        // Export to JSON and verify
        File tempJson = File.createTempFile("Standard1", ".json");
        SSTableExport.export(reader, new PrintStream(tempJson.getPath()), new String[]{asHex("rowExclude")});
        
        // Import JSON to another SSTable file
        File tempSS2 = tempSSTableFile("Keyspace1", "Standard1");
        SSTableImport.importJson(tempJson.getPath(), "Keyspace1", "Standard1", tempSS2.getPath());


        reader = SSTableReader.open(Descriptor.fromFilename(tempSS2.getPath()));
        QueryFilter qf = QueryFilter.getNamesFilter(Util.dk("rowA"), new QueryPath("Standard1", null, null), ByteBufferUtil.bytes("name"));
        ColumnFamily cf = qf.getSSTableColumnIterator(reader).getColumnFamily();
        assertTrue(cf != null);
        assertTrue(cf.getColumn(ByteBufferUtil.bytes("name")).value().equals(hexToBytes("76616c")));


        qf = QueryFilter.getNamesFilter(Util.dk("rowExclude"), new QueryPath("Standard1", null, null), ByteBufferUtil.bytes("name"));
        cf = qf.getSSTableColumnIterator(reader).getColumnFamily();
        assert cf == null;
    }

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        assert cfm != null;
        
        // write some data, force a flush, then verify that files exist on disk.
        RowMutation rm = new RowMutation(ks.name, dk.key);
        for (int i = 0; i < 100; i++)
            rm.add(new QueryPath(cfm.cfName, null, ByteBufferUtil.bytes(("col" + i))), ByteBufferUtil.bytes("anyvalue"), 1L);
        rm.apply();
        ColumnFamilyStore store = Table.open(cfm.tableName).getColumnFamilyStore(cfm.cfName);
        assert store != null;
        store.forceBlockingFlush();
        assert DefsTable.getFiles(cfm.tableName, cfm.cfName).size() > 0;
        
        new DropColumnFamily(ks.name, cfm.cfName).apply();
        
        assert !DatabaseDescriptor.getTableDefinition(ks.name).cfMetaData().containsKey(cfm.cfName);
        
        // any write should fail.
        rm = new RowMutation(ks.name, dk.key);
        boolean success = true;
        try
        {
            rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("col0")), ByteBufferUtil.bytes("value0"), 1L);
            rm.apply();
        }
        catch (Throwable th)
        {
            success = false;

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        assert oldCfm != null;
        
        // write some data, force a flush, then verify that files exist on disk.
        RowMutation rm = new RowMutation(ks.name, dk.key);
        for (int i = 0; i < 100; i++)
            rm.add(new QueryPath(oldCfm.cfName, null, ByteBufferUtil.bytes(("col" + i))), ByteBufferUtil.bytes("anyvalue"), 1L);
        rm.apply();
        ColumnFamilyStore store = Table.open(oldCfm.tableName).getColumnFamilyStore(oldCfm.cfName);
        assert store != null;
        store.forceBlockingFlush();
        int fileCount = DefsTable.getFiles(oldCfm.tableName, oldCfm.cfName).size();
        assert fileCount > 0;
        
        final String cfName = "St4ndard1Replacement";
        new RenameColumnFamily(oldCfm.tableName, oldCfm.cfName, cfName).apply();
        
        assert !DatabaseDescriptor.getTableDefinition(ks.name).cfMetaData().containsKey(oldCfm.cfName);
        assert DatabaseDescriptor.getTableDefinition(ks.name).cfMetaData().containsKey(cfName);
        
        // verify that new files are there.
        assert DefsTable.getFiles(oldCfm.tableName, cfName).size() == fileCount;
        
        // do some reads.
        store = Table.open(oldCfm.tableName).getColumnFamilyStore(cfName);
        assert store != null;
        ColumnFamily cfam = store.getColumnFamily(QueryFilter.getSliceFilter(dk, new QueryPath(cfName), ByteBufferUtil.EMPTY_BYTE_BUFFER, ByteBufferUtil.EMPTY_BYTE_BUFFER, false, 1000));
        assert cfam.getSortedColumns().size() == 100; // should be good enough?
        
        // do some writes
        rm = new RowMutation(ks.name, dk.key);
        rm.add(new QueryPath(cfName, null, ByteBufferUtil.bytes("col5")), ByteBufferUtil.bytes("updated"), 2L);
        rm.apply();
        store.forceBlockingFlush();
        
        cfam = store.getColumnFamily(QueryFilter.getNamesFilter(dk, new QueryPath(cfName), ByteBufferUtil.bytes("col5")));
        assert cfam.getColumnsMap().size() == 1;
        assert cfam.getColumn(ByteBufferUtil.bytes("col5")).value().equals( ByteBufferUtil.bytes("updated"));
    }

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