Package org.apache.cassandra.db.context.CounterContext

Examples of org.apache.cassandra.db.context.CounterContext.ContextState

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        runAllocate(bumpedSlab());
    }

    private void runAllocate(Allocator allocator)
    {
        ContextState allGlobal = ContextState.allocate(3, 0, 0, allocator);
        assertEquals(headerSizeLength + 3 * headerEltLength + 3 * stepLength, allGlobal.context.remaining());

        ContextState allLocal = ContextState.allocate(0, 3, 0, allocator);
        assertEquals(headerSizeLength + 3 * headerEltLength + 3 * stepLength, allLocal.context.remaining());

        ContextState allRemote = ContextState.allocate(0, 0, 3, allocator);
        assertEquals(headerSizeLength + 3 * stepLength, allRemote.context.remaining());

        ContextState mixed = ContextState.allocate(1, 1, 1, allocator);
        assertEquals(headerSizeLength + 2 * headerEltLength + 3 * stepLength, mixed.context.remaining());
    }
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        runDiff(bumpedSlab());
    }

    private void runDiff(Allocator allocator)
    {
        ContextState left;
        ContextState right;

        // equality: equal nodes, all counts same
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 3L, 0L);
        left.writeRemote(CounterId.fromInt(6), 2L, 0L);
        left.writeRemote(CounterId.fromInt(9), 1L, 0L);
        right = ContextState.wrap(ByteBufferUtil.clone(left.context));

        assertEquals(ContextRelationship.EQUAL, cc.diff(left.context, right.context));

        // greater than: left has superset of nodes (counts equal)
        left = ContextState.allocate(0, 0, 4, allocator);
        left.writeRemote(CounterId.fromInt(3),  3L, 0L);
        left.writeRemote(CounterId.fromInt(6),  2L, 0L);
        left.writeRemote(CounterId.fromInt(9),  1L, 0L);
        left.writeRemote(CounterId.fromInt(12), 0L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 3L, 0L);
        right.writeRemote(CounterId.fromInt(6), 2L, 0L);
        right.writeRemote(CounterId.fromInt(9), 1L, 0L);

        assertEquals(ContextRelationship.GREATER_THAN, cc.diff(left.context, right.context));

        // less than: left has subset of nodes (counts equal)
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 3L, 0L);
        left.writeRemote(CounterId.fromInt(6), 2L, 0L);
        left.writeRemote(CounterId.fromInt(9), 1L, 0L);

        right = ContextState.allocate(0, 0, 4, allocator);
        right.writeRemote(CounterId.fromInt(3),  3L, 0L);
        right.writeRemote(CounterId.fromInt(6),  2L, 0L);
        right.writeRemote(CounterId.fromInt(9),  1L, 0L);
        right.writeRemote(CounterId.fromInt(12), 0L, 0L);

        assertEquals(ContextRelationship.LESS_THAN, cc.diff(left.context, right.context));

        // greater than: equal nodes, but left has higher counts
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 3L, 0L);
        left.writeRemote(CounterId.fromInt(6), 2L, 0L);
        left.writeRemote(CounterId.fromInt(9), 3L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 3L, 0L);
        right.writeRemote(CounterId.fromInt(6), 2L, 0L);
        right.writeRemote(CounterId.fromInt(9), 1L, 0L);

        assertEquals(ContextRelationship.GREATER_THAN, cc.diff(left.context, right.context));

        // less than: equal nodes, but right has higher counts
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 3L, 0L);
        left.writeRemote(CounterId.fromInt(6), 2L, 0L);
        left.writeRemote(CounterId.fromInt(9), 3L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 3L, 0L);
        right.writeRemote(CounterId.fromInt(6), 9L, 0L);
        right.writeRemote(CounterId.fromInt(9), 3L, 0L);

        assertEquals(ContextRelationship.LESS_THAN, cc.diff(left.context, right.context));

        // disjoint: right and left have disjoint node sets
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 1L, 0L);
        left.writeRemote(CounterId.fromInt(4), 1L, 0L);
        left.writeRemote(CounterId.fromInt(9), 1L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 1L, 0L);
        right.writeRemote(CounterId.fromInt(6), 1L, 0L);
        right.writeRemote(CounterId.fromInt(9), 1L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 1L, 0L);
        left.writeRemote(CounterId.fromInt(4), 1L, 0L);
        left.writeRemote(CounterId.fromInt(9), 1L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(2),  1L, 0L);
        right.writeRemote(CounterId.fromInt(6),  1L, 0L);
        right.writeRemote(CounterId.fromInt(12), 1L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        // disjoint: equal nodes, but right and left have higher counts in differing nodes
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 1L, 0L);
        left.writeRemote(CounterId.fromInt(6), 3L, 0L);
        left.writeRemote(CounterId.fromInt(9), 1L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 1L, 0L);
        right.writeRemote(CounterId.fromInt(6), 1L, 0L);
        right.writeRemote(CounterId.fromInt(9), 5L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 2L, 0L);
        left.writeRemote(CounterId.fromInt(6), 3L, 0L);
        left.writeRemote(CounterId.fromInt(9), 1L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 1L, 0L);
        right.writeRemote(CounterId.fromInt(6), 9L, 0L);
        right.writeRemote(CounterId.fromInt(9), 5L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        // disjoint: left has more nodes, but lower counts
        left = ContextState.allocate(0, 0, 4, allocator);
        left.writeRemote(CounterId.fromInt(3),  2L, 0L);
        left.writeRemote(CounterId.fromInt(6),  3L, 0L);
        left.writeRemote(CounterId.fromInt(9),  1L, 0L);
        left.writeRemote(CounterId.fromInt(12), 1L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 4L, 0L);
        right.writeRemote(CounterId.fromInt(6), 9L, 0L);
        right.writeRemote(CounterId.fromInt(9), 5L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        // disjoint: left has less nodes, but higher counts
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 5L, 0L);
        left.writeRemote(CounterId.fromInt(6), 3L, 0L);
        left.writeRemote(CounterId.fromInt(9), 2L, 0L);

        right = ContextState.allocate(0, 0, 4, allocator);
        right.writeRemote(CounterId.fromInt(3),  4L, 0L);
        right.writeRemote(CounterId.fromInt(6),  3L, 0L);
        right.writeRemote(CounterId.fromInt(9),  2L, 0L);
        right.writeRemote(CounterId.fromInt(12), 1L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        // disjoint: mixed nodes and counts
        left = ContextState.allocate(0, 0, 3, allocator);
        left.writeRemote(CounterId.fromInt(3), 5L, 0L);
        left.writeRemote(CounterId.fromInt(6), 2L, 0L);
        left.writeRemote(CounterId.fromInt(9), 2L, 0L);

        right = ContextState.allocate(0, 0, 4, allocator);
        right.writeRemote(CounterId.fromInt(3),  4L, 0L);
        right.writeRemote(CounterId.fromInt(6),  3L, 0L);
        right.writeRemote(CounterId.fromInt(9),  2L, 0L);
        right.writeRemote(CounterId.fromInt(12), 1L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));

        left = ContextState.allocate(0, 0, 4, allocator);
        left.writeRemote(CounterId.fromInt(3), 5L, 0L);
        left.writeRemote(CounterId.fromInt(6), 2L, 0L);
        left.writeRemote(CounterId.fromInt(7), 2L, 0L);
        left.writeRemote(CounterId.fromInt(9), 2L, 0L);

        right = ContextState.allocate(0, 0, 3, allocator);
        right.writeRemote(CounterId.fromInt(3), 4L, 0L);
        right.writeRemote(CounterId.fromInt(6), 3L, 0L);
        right.writeRemote(CounterId.fromInt(9), 2L, 0L);

        assertEquals(ContextRelationship.DISJOINT, cc.diff(left.context, right.context));
    }
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    }

    private void runMerge(Allocator allocator)
    {
        // note: local counts aggregated; remote counts are reconciled (i.e. take max)
        ContextState left = ContextState.allocate(0, 1, 3, allocator);
        left.writeRemote(CounterId.fromInt(1), 1L, 1L);
        left.writeRemote(CounterId.fromInt(2), 2L, 2L);
        left.writeRemote(CounterId.fromInt(4), 6L, 3L);
        left.writeLocal(CounterId.getLocalId(), 7L, 3L);

        ContextState right = ContextState.allocate(0, 1, 2, allocator);
        right.writeRemote(CounterId.fromInt(4), 4L, 4L);
        right.writeRemote(CounterId.fromInt(5), 5L, 5L);
        right.writeLocal(CounterId.getLocalId(), 2L, 9L);

        ByteBuffer merged = cc.merge(left.context, right.context, allocator);
        int hd = 4;

        assertEquals(hd + 5 * stepLength, merged.remaining());
        // local node id's counts are aggregated
        assertTrue(Util.equalsCounterId(CounterId.getLocalId(), merged, hd + 4 * stepLength));
        assertEquals(9L, merged.getLong(merged.position() + hd + 4 * stepLength + idLength));
        assertEquals(12L,  merged.getLong(merged.position() + hd + 4*stepLength + idLength + clockLength));

        // remote node id counts are reconciled (i.e. take max)
        assertTrue(Util.equalsCounterId(CounterId.fromInt(4), merged, hd + 2 * stepLength));
        assertEquals(6L, merged.getLong(merged.position() + hd + 2 * stepLength + idLength));
        assertEquals( 3L,  merged.getLong(merged.position() + hd + 2*stepLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(5), merged, hd + 3 * stepLength));
        assertEquals(5L, merged.getLong(merged.position() + hd + 3 * stepLength + idLength));
        assertEquals( 5L,  merged.getLong(merged.position() + hd + 3*stepLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(2), merged, hd + stepLength));
        assertEquals(2L, merged.getLong(merged.position() + hd + stepLength + idLength));
        assertEquals( 2L,  merged.getLong(merged.position() + hd + stepLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(1), merged, hd));
        assertEquals( 1L,  merged.getLong(merged.position() + hd + idLength));
        assertEquals( 1L,  merged.getLong(merged.position() + hd + idLength + clockLength));

        //
        // Test merging two exclusively global contexts
        //
        left = ContextState.allocate(3, 0, 0, allocator);
        left.writeGlobal(CounterId.fromInt(1), 1L, 1L);
        left.writeGlobal(CounterId.fromInt(2), 2L, 2L);
        left.writeGlobal(CounterId.fromInt(3), 3L, 3L);

        right = ContextState.allocate(3, 0, 0, allocator);
        right.writeGlobal(CounterId.fromInt(3), 6L, 6L);
        right.writeGlobal(CounterId.fromInt(4), 4L, 4L);
        right.writeGlobal(CounterId.fromInt(5), 5L, 5L);

        merged = cc.merge(left.context, right.context, allocator);
        assertEquals(headerSizeLength + 5 * headerEltLength + 5 * stepLength, merged.remaining());
        assertEquals(18L, cc.total(merged));
        assertEquals(5, merged.getShort(merged.position()));

        int headerLength = headerSizeLength + 5 * headerEltLength;
        assertTrue(Util.equalsCounterId(CounterId.fromInt(1), merged, headerLength));
        assertEquals(1L, merged.getLong(merged.position() + headerLength + idLength));
        assertEquals(1L, merged.getLong(merged.position() + headerLength + idLength + clockLength));
        assertTrue(Util.equalsCounterId(CounterId.fromInt(2), merged, headerLength + stepLength));
        assertEquals(2L, merged.getLong(merged.position() + headerLength + stepLength + idLength));
        assertEquals(2L, merged.getLong(merged.position() + headerLength + stepLength + idLength + clockLength));
        // pick the global shard with the largest clock
        assertTrue(Util.equalsCounterId(CounterId.fromInt(3), merged, headerLength + 2 * stepLength));
        assertEquals(6L, merged.getLong(merged.position() + headerLength + 2 * stepLength + idLength));
        assertEquals(6L, merged.getLong(merged.position() + headerLength + 2 * stepLength + idLength + clockLength));
        assertTrue(Util.equalsCounterId(CounterId.fromInt(4), merged, headerLength + 3 * stepLength));
        assertEquals(4L, merged.getLong(merged.position() + headerLength + 3 * stepLength + idLength));
        assertEquals(4L, merged.getLong(merged.position() + headerLength + 3 * stepLength + idLength + clockLength));
        assertTrue(Util.equalsCounterId(CounterId.fromInt(5), merged, headerLength + 4 * stepLength));
        assertEquals(5L, merged.getLong(merged.position() + headerLength + 4 * stepLength + idLength));
        assertEquals(5L, merged.getLong(merged.position() + headerLength + 4 * stepLength + idLength + clockLength));

        //
        // Test merging two global contexts w/ 'invalid shards'
        //
        left = ContextState.allocate(1, 0, 0, allocator);
        left.writeGlobal(CounterId.fromInt(1), 10L, 20L);

        right = ContextState.allocate(1, 0, 0, allocator);
        right.writeGlobal(CounterId.fromInt(1), 10L, 30L);

        merged = cc.merge(left.context, right.context, allocator);
        headerLength = headerSizeLength + headerEltLength;
        assertEquals(headerLength + stepLength, merged.remaining());
        assertEquals(30L, cc.total(merged));
        assertEquals(1, merged.getShort(merged.position()));
        assertTrue(Util.equalsCounterId(CounterId.fromInt(1), merged, headerLength));
        assertEquals(10L, merged.getLong(merged.position() + headerLength + idLength));
        // with equal clock, we should pick the largest value
        assertEquals(30L, merged.getLong(merged.position() + headerLength + idLength + clockLength));

        //
        // Test merging global w/ mixed contexts
        //
        left = ContextState.allocate(2, 0, 0, allocator);
        left.writeGlobal(CounterId.fromInt(1), 1L, 1L);
        left.writeGlobal(CounterId.fromInt(2), 1L, 1L);

        right = ContextState.allocate(0, 1, 1, allocator);
        right.writeLocal(CounterId.fromInt(1), 100L, 100L);
        right.writeRemote(CounterId.fromInt(2), 100L, 100L);

        // global shards should dominate local/remote, even with lower clock and value
        merged = cc.merge(left.context, right.context, allocator);
        headerLength = headerSizeLength + 2 * headerEltLength;
        assertEquals(headerLength + 2 * stepLength, merged.remaining());
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        runTotal(bumpedSlab());
    }

    private void runTotal(Allocator allocator)
    {
        ContextState mixed = ContextState.allocate(0, 1, 4, allocator);
        mixed.writeRemote(CounterId.fromInt(1), 1L, 1L);
        mixed.writeRemote(CounterId.fromInt(2), 2L, 2L);
        mixed.writeRemote(CounterId.fromInt(4), 4L, 4L);
        mixed.writeRemote(CounterId.fromInt(5), 5L, 5L);
        mixed.writeLocal(CounterId.getLocalId(), 12L, 12L);
        assertEquals(24L, cc.total(mixed.context));

        ContextState global = ContextState.allocate(3, 0, 0, allocator);
        global.writeGlobal(CounterId.fromInt(1), 1L, 1L);
        global.writeGlobal(CounterId.fromInt(2), 2L, 2L);
        global.writeGlobal(CounterId.fromInt(3), 3L, 3L);
        assertEquals(6L, cc.total(global.context));
    }
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    }

    @Test
    public void testClearLocal()
    {
        ContextState state;
        ByteBuffer marked;
        ByteBuffer cleared;
        Allocator allocator = HeapAllocator.instance;

        // mark/clear for remote-only contexts is a no-op
        state = ContextState.allocate(0, 0, 1, allocator);
        state.writeRemote(CounterId.fromInt(1), 1L, 1L);

        assertFalse(cc.shouldClearLocal(state.context));
        marked = cc.markLocalToBeCleared(state.context);
        assertEquals(0, marked.getShort(marked.position()));
        assertSame(state.context, marked); // should return the original context

        cleared = cc.clearAllLocal(marked);
        assertSame(cleared, marked); // shouldn't alter anything either

        // a single local shard
        state = ContextState.allocate(0, 1, 0, allocator);
        state.writeLocal(CounterId.fromInt(1), 1L, 1L);

        assertFalse(cc.shouldClearLocal(state.context));
        marked = cc.markLocalToBeCleared(state.context);
        assertTrue(cc.shouldClearLocal(marked));
        assertEquals(-1, marked.getShort(marked.position()));
        assertNotSame(state.context, marked); // shouldn't alter in place, as it used to do

        cleared = cc.clearAllLocal(marked);
        assertFalse(cc.shouldClearLocal(cleared));
        assertEquals(0, cleared.getShort(cleared.position()));

        // 2 global + 1 local shard
        state = ContextState.allocate(2, 1, 0, allocator);
        state.writeLocal(CounterId.fromInt(1), 1L, 1L);
        state.writeGlobal(CounterId.fromInt(2), 2L, 2L);
        state.writeGlobal(CounterId.fromInt(3), 3L, 3L);

        assertFalse(cc.shouldClearLocal(state.context));
        marked = cc.markLocalToBeCleared(state.context);
        assertTrue(cc.shouldClearLocal(marked));

        assertEquals(-3, marked.getShort(marked.position()));
        assertEquals(0, marked.getShort(marked.position() + headerSizeLength));
        assertEquals(Short.MIN_VALUE + 1, marked.getShort(marked.position() + headerSizeLength + headerEltLength));
        assertEquals(Short.MIN_VALUE + 2, marked.getShort(marked.position() + headerSizeLength + 2 * headerEltLength));

        int headerLength = headerSizeLength + 3 * headerEltLength;
        assertTrue(Util.equalsCounterId(CounterId.fromInt(1), marked, headerLength));
        assertEquals(1L, marked.getLong(marked.position() + headerLength + idLength));
        assertEquals(1L, marked.getLong(marked.position() + headerLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(2), marked, headerLength + stepLength));
        assertEquals(2L, marked.getLong(marked.position() + headerLength + stepLength + idLength));
        assertEquals(2L, marked.getLong(marked.position() + headerLength + stepLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(3), marked, headerLength + 2 * stepLength));
        assertEquals(3L, marked.getLong(marked.position() + headerLength + 2 * stepLength + idLength));
        assertEquals(3L, marked.getLong(marked.position() + headerLength + 2 * stepLength + idLength + clockLength));

        cleared = cc.clearAllLocal(marked);
        assertFalse(cc.shouldClearLocal(cleared));

        assertEquals(2, cleared.getShort(cleared.position())); // 2 global shards
        assertEquals(Short.MIN_VALUE + 1, cleared.getShort(marked.position() + headerEltLength));
        assertEquals(Short.MIN_VALUE + 2, cleared.getShort(marked.position() + headerSizeLength + headerEltLength));

        headerLength = headerSizeLength + 2 * headerEltLength;
        assertTrue(Util.equalsCounterId(CounterId.fromInt(1), cleared, headerLength));
        assertEquals(1L, cleared.getLong(cleared.position() + headerLength + idLength));
        assertEquals(1L, cleared.getLong(cleared.position() + headerLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(2), cleared, headerLength + stepLength));
        assertEquals(2L, cleared.getLong(cleared.position() + headerLength + stepLength + idLength));
        assertEquals(2L, cleared.getLong(cleared.position() + headerLength + stepLength + idLength + clockLength));

        assertTrue(Util.equalsCounterId(CounterId.fromInt(3), cleared, headerLength + 2 * stepLength));
        assertEquals(3L, cleared.getLong(cleared.position() + headerLength + 2 * stepLength + idLength));
        assertEquals(3L, cleared.getLong(cleared.position() + headerLength + 2 * stepLength + idLength + clockLength));

        // a single global shard - no-op
        state = ContextState.allocate(1, 0, 0, allocator);
        state.writeGlobal(CounterId.fromInt(1), 1L, 1L);

        assertFalse(cc.shouldClearLocal(state.context));
        marked = cc.markLocalToBeCleared(state.context);
        assertEquals(1, marked.getShort(marked.position()));
        assertSame(state.context, marked);
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        List<CounterId.CounterIdRecord> records = new ArrayList<CounterId.CounterIdRecord>();
        records.add(new CounterId.CounterIdRecord(id1, 2L));
        records.add(new CounterId.CounterIdRecord(id3, 4L));
        records.add(new CounterId.CounterIdRecord(id6, 10L));

        ContextState ctx = ContextState.allocate(6, 3, allocator);
        ctx.writeElement(id1, 0L, 1L, true);
        ctx.writeElement(CounterId.fromInt(2), 0L, 2L);
        ctx.writeElement(id3, 0L, 3L, true);
        ctx.writeElement(CounterId.fromInt(4), 0L, 3L);
        ctx.writeElement(CounterId.fromInt(5), 0L, 3L, true);
        ctx.writeElement(id6, 0L, 6L);

        int timeFirstMerge = (int)(System.currentTimeMillis() / 1000);

        // First, only merge the first id
        ByteBuffer merger = cc.computeOldShardMerger(ctx.context, records, 3L);
        ByteBuffer merged = cc.merge(ctx.context, merger, allocator);
        assert cc.total(ctx.context) == cc.total(merged);

        try
        {
            Thread.sleep(2000);
        }
        catch (InterruptedException e)
        {
            throw new AssertionError();
        }

        // merge the second one
        ByteBuffer merger2 = cc.computeOldShardMerger(merged, records, 7L);
        ByteBuffer merged2 = cc.merge(merged, merger2, allocator);
        assert cc.total(ctx.context) == cc.total(merged2);

        ByteBuffer cleaned = cc.removeOldShards(merged2, timeFirstMerge + 1);
        assert cc.total(ctx.context) == cc.total(cleaned);
        assert cleaned.remaining() == ctx.context.remaining();

        // We should have cleaned id1 but not id3
        ContextState m = new ContextState(cleaned);
        m.moveToNext();
        assert m.getCounterId().equals(id3);

    }
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        runRemoveNotDeltaOldShards(bumpedSlab());
    }

    private void runRemoveNotDeltaOldShards(Allocator allocator)
    {
        ContextState ctx = ContextState.allocate(4, 1, allocator);
        ctx.writeElement(CounterId.fromInt(1), 1L, 1L, true);
        ctx.writeElement(CounterId.fromInt(2), -System.currentTimeMillis(), 0L);
        ctx.writeElement(CounterId.fromInt(3), -System.currentTimeMillis(), 0L);
        ctx.writeElement(CounterId.fromInt(4), -System.currentTimeMillis(), 0L);

        ByteBuffer cleaned = cc.removeOldShards(ctx.context, (int)(System.currentTimeMillis() / 1000) + 1);
        assert cc.total(ctx.context) == cc.total(cleaned);
        assert cleaned.remaining() == ctx.context.remaining() - 3 * stepLength;
    }
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    @Test
    public void testDiff() throws UnknownHostException
    {
        Allocator allocator = HeapAllocator.instance;
        ContextState left;
        ContextState right;

        CounterColumn leftCol;
        CounterColumn rightCol;

        // timestamp
        leftCol = new CounterColumn(ByteBufferUtil.bytes("x"), 0, 1L);
        rightCol = new CounterColumn(ByteBufferUtil.bytes("x"), 0, 2L);

        assert rightCol == leftCol.diff(rightCol);
        assert null     == rightCol.diff(leftCol);

        // timestampOfLastDelete
        leftCol = new CounterColumn(ByteBufferUtil.bytes("x"), 0, 1L, 1L);
        rightCol = new CounterColumn(ByteBufferUtil.bytes("x"), 0, 1L, 2L);

        assert rightCol == leftCol.diff(rightCol);
        assert null     == rightCol.diff(leftCol);

        // equality: equal nodes, all counts same
        left = ContextState.allocate(3, 0, allocator);
        left.writeElement(CounterId.fromInt(3), 3L, 0L);
        left.writeElement(CounterId.fromInt(6), 2L, 0L);
        left.writeElement(CounterId.fromInt(9), 1L, 0L);
        right = new ContextState(ByteBufferUtil.clone(left.context), 2);

        leftCol  = new CounterColumn(ByteBufferUtil.bytes("x"), left.context,  1L);
        rightCol = new CounterColumn(ByteBufferUtil.bytes("x"), right.context, 1L);
        assert leftCol.diff(rightCol) == null;

        // greater than: left has superset of nodes (counts equal)
        left = ContextState.allocate(4, 0, allocator);
        left.writeElement(CounterId.fromInt(3), 3L, 0L);
        left.writeElement(CounterId.fromInt(6), 2L, 0L);
        left.writeElement(CounterId.fromInt(9), 1L, 0L);
        left.writeElement(CounterId.fromInt(12), 0L, 0L);

        right = ContextState.allocate(3, 0, allocator);
        right.writeElement(CounterId.fromInt(3), 3L, 0L);
        right.writeElement(CounterId.fromInt(6), 2L, 0L);
        right.writeElement(CounterId.fromInt(9), 1L, 0L);

        leftCol  = new CounterColumn(ByteBufferUtil.bytes("x"), left.context,  1L);
        rightCol = new CounterColumn(ByteBufferUtil.bytes("x"), right.context, 1L);
        assert leftCol.diff(rightCol) == null;

        // less than: right has subset of nodes (counts equal)
        assert leftCol == rightCol.diff(leftCol);

        // disjoint: right and left have disjoint node sets
        left = ContextState.allocate(3, 0, allocator);
        left.writeElement(CounterId.fromInt(3), 1L, 0L);
        left.writeElement(CounterId.fromInt(4), 1L, 0L);
        left.writeElement(CounterId.fromInt(9), 1L, 0L);

        right = ContextState.allocate(3, 0, allocator);
        right.writeElement(CounterId.fromInt(3), 1L, 0L);
        right.writeElement(CounterId.fromInt(6), 1L, 0L);
        right.writeElement(CounterId.fromInt(9), 1L, 0L);

        leftCol  = new CounterColumn(ByteBufferUtil.bytes("x"), left.context,  1L);
        rightCol = new CounterColumn(ByteBufferUtil.bytes("x"), right.context, 1L);
        assert rightCol == leftCol.diff(rightCol);
        assert leftCol  == rightCol.diff(leftCol);
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    }

    @Test
    public void testAddColumnIncrementCounter()
    {
        ContextState state;

      SuperColumn sc = new SuperColumn(ByteBufferUtil.bytes("sc1"), LongType.instance);

        state = ContextState.allocate(4, 1);
        state.writeElement(CounterId.fromInt(1), 7L, 0L);
        state.writeElement(CounterId.fromInt(2), 5L, 7L);
        state.writeElement(CounterId.fromInt(4), 2L, 9L);
        state.writeElement(CounterId.getLocalId(), 3L, 3L, true);
        sc.addColumn(new CounterColumn(getBytes(1), state.context, 3L, 0L));

        state = ContextState.allocate(4, 1);
        state.writeElement(CounterId.fromInt(2), 3L, 4L);
        state.writeElement(CounterId.fromInt(4), 4L, 1L);
        state.writeElement(CounterId.fromInt(8), 9L, 0L);
        state.writeElement(CounterId.getLocalId(), 9L, 5L, true);
        sc.addColumn(new CounterColumn(getBytes(1), state.context, 10L, 0L));

        state = ContextState.allocate(3, 0);
        state.writeElement(CounterId.fromInt(2), 1L, 0L);
        state.writeElement(CounterId.fromInt(3), 6L, 0L);
        state.writeElement(CounterId.fromInt(7), 3L, 0L);
        sc.addColumn(new CounterColumn(getBytes(2), state.context, 9L, 0L));

      assertNotNull(sc.getSubColumn(getBytes(1)));
      assertNull(sc.getSubColumn(getBytes(3)));

        // column: 1
        ContextState c1 = ContextState.allocate(5, 1);
        c1.writeElement(CounterId.fromInt(1), 7L, 0L);
        c1.writeElement(CounterId.fromInt(2), 5L, 7L);
        c1.writeElement(CounterId.fromInt(4), 4L, 1L);
        c1.writeElement(CounterId.fromInt(8), 9L, 0L);
        c1.writeElement(CounterId.getLocalId(), 12L, 8L, true);
        assert 0 == ByteBufferUtil.compareSubArrays(
            ((CounterColumn)sc.getSubColumn(getBytes(1))).value(),
            0,
            c1.context,
            0,
            c1.context.remaining());

        // column: 2
        ContextState c2 = ContextState.allocate(3, 0);
        c2.writeElement(CounterId.fromInt(2), 1L, 0L);
        c2.writeElement(CounterId.fromInt(3), 6L, 0L);
        c2.writeElement(CounterId.fromInt(7), 3L, 0L);
        assert 0 == ByteBufferUtil.compareSubArrays(
            ((CounterColumn)sc.getSubColumn(getBytes(2))).value(),
            0,
            c2.context,
            0,
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        long now = System.currentTimeMillis();
        IColumn c = cf.getColumn(ByteBufferUtil.bytes("Column1"));
        assert c != null;
        assert c instanceof CounterColumn;
        assert ((CounterColumn)c).total() == 12L;
        ContextState s = new ContextState(c.value());
        assert s.getCounterId().equals(id1);
        assert s.getCount() == 0L;
        assert -s.getClock() > now - 1000 : " >";
        assert -s.getClock() <= now;
        s.moveToNext();
        assert s.getCounterId().equals(id2);
        assert s.getCount() == 0L;
        assert -s.getClock() > now - 1000;
        assert -s.getClock() <= now;
        s.moveToNext();
        assert s.getCounterId().equals(id3);
        assert s.getCount() == 12L;

        // Then collect old shards
        CounterColumn.mergeAndRemoveOldShards(dk, cf, Integer.MAX_VALUE, Integer.MIN_VALUE, false);
        c = cf.getColumn(ByteBufferUtil.bytes("Column1"));
        assert c != null;
        assert c instanceof CounterColumn;
        assert ((CounterColumn)c).total() == 12L;
        s = new ContextState(c.value());
        assert s.getCounterId().equals(id3);
        assert s.getCount() == 12L;
    }
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Related Classes of org.apache.cassandra.db.context.CounterContext.ContextState

  • org.apache.cassandra.db.compaction.LongCompactionSpeedTest
  • org.apache.cassandra.db.context.CounterContextTest
  • org.apache.cassandra.db.CounterCellTest
  • org.apache.cassandra.db.CounterColumnTest
  • org.apache.cassandra.db.CounterMutationTest
  • org.apache.cassandra.db.LongCompactionSpeedTest
  • org.apache.cassandra.db.SuperColumnTest
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