Examples of voldemort.versioning.VectorClock

voldemort.versioning.VectorClock
A vector of the number of writes mastered by each node. The vector is stored sparely, since, in general, writes will be mastered by only one node. This means implicitly all the versions are at zero, but we only actually store those greater than zero.

                                                             "multipart/mixed");
            MimeMultipart mp = new MimeMultipart(ds);
            assertEquals("The number of body parts expected is not 1", 1, mp.getCount());


            MimeBodyPart part = (MimeBodyPart) mp.getBodyPart(0);
            VectorClock vc = RestUtils.deserializeVectorClock(part.getHeader(RestMessageHeaders.X_VOLD_VECTOR_CLOCK)[0]);
            int contentLength = Integer.parseInt(part.getHeader(RestMessageHeaders.CONTENT_LENGTH)[0]);
            byte[] bodyPartBytes = new byte[contentLength];


            part.getInputStream().read(bodyPartBytes);
            response = new String(bodyPartBytes);

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    public Store<ByteArray, byte[], byte[]> getStore() throws Exception {
        return store;
    }


    public VectorClock getNewIncrementedVectorClock() {
        VectorClock vectorClock = new VectorClock();
        vectorClock.incrementVersion(this.nodeId, System.currentTimeMillis());
        return vectorClock;
    }

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    @Test
    public void testFetchedEqualsPut() throws Exception {
        System.out.println("                    Testing Fetchhed equals put                    ");
        ByteArray key = getKey();
        Store<ByteArray, byte[], byte[]> store = getStore();
        VectorClock clock = getClock(1, 1, 2, 3, 3, 4);
        byte[] value = getValue();
        System.out.println("Value chosen : " + value);
        List<Versioned<byte[]>> resultList = store.get(key, null);
        assertNotNull("Null result list obtained from a get request", resultList);
        assertEquals("Store not empty at start!", 0, resultList.size());

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            // this is good
        } catch(NullPointerException npe) {
            // this is good
        }
        try {
            store.delete(null, new VectorClock());
            fail("Store should not delete null keys!");
        } catch(IllegalArgumentException e) {
            // this is good
        } catch(NullPointerException npe) {
            // this is good

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    @Test
    public void testGetVersions() throws Exception {
        List<ByteArray> keys = getKeys(2);
        ByteArray key = keys.get(0);
        byte[] value = getValue();
        VectorClock vc = getClock(0, 0);
        Store<ByteArray, byte[], byte[]> store = getStore();
        store.put(key, Versioned.value(value, vc), null);
        List<Versioned<byte[]>> versioneds = store.get(key, null);
        List<Version> versions = store.getVersions(key);
        assertEquals(1, versioneds.size());

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        int putCount = 10;
        List<ByteArray> keys = getKeys(putCount);
        List<byte[]> values = getValues(putCount);
        assertEquals(putCount, values.size());
        for(int i = 0; i < putCount; i++) {
            VectorClock vc = getClock(0, 0);
            store.put(keys.get(i), new Versioned<byte[]>(values.get(i), vc), null);
        }


        int countForGet = putCount / 2;
        List<ByteArray> keysForGet = keys.subList(0, countForGet);

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        assertEquals(keys.size(), values.size());
        int count = keys.size();


        for(int i = 0; i < count; i++) {
            VectorClock vc = getClock(0, 0);
            store.put(keys.get(i), new Versioned<byte[]>(values.get(i), vc), null);
        }


        Map<ByteArray, List<Versioned<byte[]>>> result = store.getAll(keys, null);
        assertGetAllValues(keys, values, result);

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    public void testGetWithBinaryData() throws Exception {
        Store<ByteArray, byte[], byte[]> store = getStore();


        byte[] allPossibleBytes = getAllPossibleBytes();
        ByteArray key = new ByteArray(allPossibleBytes);
        VectorClock vc = getClock(0, 0);
        Versioned<byte[]> versioned = new Versioned<byte[]>(allPossibleBytes, vc);
        store.put(key, versioned, null);


        List<Versioned<byte[]>> found = store.get(key, null);
        assertEquals("Should only be one version stored.", 1, found.size());

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                     client.get("k", new Versioned<String>("v")));
        assertEquals("null should be an acceptable default value.",
                     null,
                     client.getValue("k", null));
        client.put("k", "v");
        VectorClock expectedVC = new VectorClock().incremented(nodeId, time.getMilliseconds());
        assertEquals("If there is a value for k, get(k) should return it.",
                     "v",
                     client.get("k", new Versioned<String>("v2")).getValue());
        assertNotNull(client.get("k").getVersion());
    }

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            }
            if(this.zoneId != INVALID_ZONE_ID) {
                rb.setHeader(RestMessageHeaders.X_VOLD_ZONE_ID, String.valueOf(this.zoneId));
            }
            // Serialize the Vector clock
            VectorClock vc = (VectorClock) version;


            // If the given Vector clock is empty, we'll let the receiver of
            // this request fetch the existing vector clock and increment
            // before
            // doing the put.
            if(vc != null && vc.getEntries().size() != 0) {
                String serializedVC = null;
                if(!vc.getEntries().isEmpty()) {
                    serializedVC = RestUtils.getSerializedVectorClock(vc);
                }


                if(serializedVC != null && serializedVC.length() > 0) {
                    rb.setHeader(RestMessageHeaders.X_VOLD_VECTOR_CLOCK, serializedVC);

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