Examples of org.apache.accumulo.core.data.Mutation

org.apache.accumulo.core.data.Mutation

Mutation represents an action that manipulates a row in a table. A mutation holds a list of column/value pairs that represent an atomic set of modifications to make to a row.
Convenience methods which takes columns and value as CharSequence (String implements CharSequence) are provided. CharSequence is converted to UTF-8 by constructing a new Text object.
When always passing in the same data as a CharSequence/String, its probably more efficient to call the Text put methods. This way the data is only encoded once and only one Text object is created.
All of the put methods append data to the mutation, they do not overwrite anything that was previously put. The mutation holds a list of all column/values that were put into it. The putDelete() methods do not remove something that was previously added to the mutation, rather they indicate that Accumulo should insert a delete marker for that row column.

    public void addData() {
        try {
            Connector conn = mockInstance.getConnector("user1", "password");
            BatchWriter writer = conn.createBatchWriter
                    (PEOPLE_TABLE, MAX_MEMORY, MAX_LATENCY, MAX_WRITE_THREADS);
            Mutation m1 = new Mutation("row1");
            m1.put(INFO_CF, NAME, new Value("brian".getBytes()));
            m1.put(INFO_CF, AGE, new Value(ByteBuffer.wrap(new byte[4]).putInt(30).array()));
            m1.put(INFO_CF, SIBLINGS, new Value(ByteBuffer.wrap(new byte[4]).putInt(3).array()));
            m1.put(INFO_CF, LIFETIME_MILLS, new Value(ByteBuffer.wrap(new byte[8]).putLong(12345l).array()));
            m1.put(INFO_CF, GPA, new Value(ByteBuffer.wrap(new byte[8]).putDouble(3.7d).array()));
            m1.put(INFO_CF, HEIGHT, new Value("6ft".getBytes()));
            m1.put(EVENTS_CF, EVENT1, new Value("".getBytes()));
            m1.put(EVENTS_CF, EVENT2, new Value("".getBytes()));


            Mutation m2 = new Mutation("row2");
            m2.put(INFO_CF, NAME, new Value("adam".getBytes()));
            m2.put(INFO_CF, AGE, new Value(ByteBuffer.wrap(new byte[4]).putInt(29).array()));
            m2.put(INFO_CF, SIBLINGS, new Value(ByteBuffer.wrap(new byte[4]).putInt(6).array()));
            m2.put(INFO_CF, LIFETIME_MILLS, new Value(ByteBuffer.wrap(new byte[8]).putLong(6789l).array()));
            m2.put(INFO_CF, GPA, new Value(ByteBuffer.wrap(new byte[8]).putDouble(3.2d).array()));
            m2.put(INFO_CF, HEIGHT, new Value("5ft7inch".getBytes()));
            m2.put(EVENTS_CF, EVENT1, new Value("".getBytes()));


            writer.addMutation(m1);
            writer.addMutation(m2);
            writer.close();

View Full Code Here

    public void addData() {
        try {
            Connector conn = mockInstance.getConnector("user1", "password");
            BatchWriter writer = conn.createBatchWriter
                    (PEOPLE_TABLE, MAX_MEMORY, MAX_LATENCY, MAX_WRITE_THREADS);
            Mutation m1 = new Mutation("row1");
            m1.put(INFO_CF, NAME, new Value("brian".getBytes()));
            m1.put(INFO_CF, AGE, new Value("30".getBytes()));
            m1.put(INFO_CF, HEIGHT, new Value("6ft".getBytes()));
            m1.put(EVENTS_CF, EVENT1, new Value("".getBytes()));
            m1.put(EVENTS_CF, EVENT2, new Value("".getBytes()));


            Mutation m2 = new Mutation("row2");
            m2.put(INFO_CF, NAME, new Value("adam".getBytes()));
            m2.put(INFO_CF, AGE, new Value("29".getBytes()));
            m2.put(INFO_CF, HEIGHT, new Value("5ft7inch".getBytes()));
            m2.put(EVENTS_CF, EVENT1, new Value("".getBytes()));


            writer.addMutation(m1);
            writer.addMutation(m2);
            writer.close();

View Full Code Here

     */
    public static <C> DBItemTransformer<Mutation, C> primativeCellValueToBytes() {
        return new DBItemTransformer<Mutation, C>() {
            public List<Mutation> apply(CellGroup<C> group) throws CellExtractorException {
                String rowId = group.getTag();
                Mutation m1 = new Mutation(rowId);
                List<Mutation> mutations = Lists.newArrayList();
                for (C cell : group.getInternalList()) {
                    String colFam = CellReflector.getColFam(cell);
                    String label = CellReflector.getLabelAsString(cell);
                    byte[] value = CellReflector.getValueBytesIfPrimative(cell);
                    m1.put(new Text(colFam), new Text(label), new Value(value));
                }
                mutations.add(m1);
                return mutations;
            }
        };

View Full Code Here

    public static <C> DBItemTransformer<Mutation, C> primativeCellValueToBytesWithColVis
            (final String colVisAuxName) {
        return new DBItemTransformer<Mutation, C>() {
            public List<Mutation> apply(CellGroup<C> group) throws CellExtractorException {
                String rowId = group.getTag();
                Mutation m1 = new Mutation(rowId);
                List<Mutation> mutations = Lists.newArrayList();
                for (C cell : group.getInternalList()) {
                    String colFam = CellReflector.getColFam(cell);
                    String label = CellReflector.getLabelAsString(cell);
                    String colVis = CellReflector.getAuxiliaryValue(String.class, cell, colVisAuxName);
                    byte[] value = CellReflector.getValueBytesIfPrimative(cell);
                    m1.put(new Text(colFam), new Text(label), new ColumnVisibility(colVis), new Value(value));
                }
                mutations.add(m1);
                return mutations;
            }
        };

View Full Code Here

    public static <C> DBItemTransformer<Mutation, C> primativeCellValueToBytesWithColVisAndTimestamp
            (final String timestampAuxName, final String colVisAuxName) {
        return new DBItemTransformer<Mutation, C>() {
            public List<Mutation> apply(CellGroup<C> group) throws CellExtractorException {
                String rowId = group.getTag();
                Mutation m1 = new Mutation(rowId);
                List<Mutation> mutations = Lists.newArrayList();
                for (C cell : group.getInternalList()) {
                    String colFam = CellReflector.getColFam(cell);
                    String label = CellReflector.getLabelAsString(cell);
                    String colVis = CellReflector.getAuxiliaryValue(String.class, cell, colVisAuxName);
                    long ts = CellReflector.getAuxiliaryValue(long.class, cell, timestampAuxName);
                    byte[] value = CellReflector.getValueBytesIfPrimative(cell);
                    m1.put(new Text(colFam), new Text(label), new ColumnVisibility(colVis), ts, new Value(value));
                }
                mutations.add(m1);
                return mutations;
            }
        };

View Full Code Here

    public static <C> DBItemTransformer<Mutation, C> primativeCellValueToBytesWithTimestamp
            (final String timestampAuxName) {
        return new DBItemTransformer<Mutation, C>() {
            public List<Mutation> apply(CellGroup<C> group) throws CellExtractorException {
                String rowId = group.getTag();
                Mutation m1 = new Mutation(rowId);
                List<Mutation> mutations = Lists.newArrayList();
                for (C cell : group.getInternalList()) {
                    String colFam = CellReflector.getColFam(cell);
                    String label = CellReflector.getLabelAsString(cell);
                    long ts = CellReflector.getAuxiliaryValue(long.class, cell, timestampAuxName);
                    byte[] value = CellReflector.getValueBytesIfPrimative(cell);
                    m1.put(new Text(colFam), new Text(label),ts, new Value(value));
                }
                mutations.add(m1);
                return mutations;
            }
        };

View Full Code Here

            (final Set<String> colFamsToWriteValueAsQual) {
        return new DBItemTransformer<Mutation, C>() {
            private final byte[] emptyArray = new byte[]{};
            public List<Mutation> apply(CellGroup<C> group) throws CellExtractorException {
                String rowId = group.getTag();
                Mutation m1 = new Mutation(rowId);
                List<Mutation> mutations = Lists.newArrayList();
                for (C cell : group.getInternalList()) {
                    String colFam = CellReflector.getColFam(cell);
                    String qual = CellReflector.getLabelAsString(cell);
                    byte[] value = CellReflector.getValueBytesIfPrimative(cell);
                    if(colFamsToWriteValueAsQual.contains(colFam)){
                        qual = CellReflector.getValueAsString(cell);
                        value = emptyArray;
                    }
                    m1.put(new Text(colFam), new Text(qual),new Value(value));
                }
                mutations.add(m1);
                return mutations;
            }
        };

View Full Code Here

     */
    public static <C> DBItemTransformer<Mutation, C> allCellGroupsToSingleRowId
            (final String rowId) {
        return new DBItemTransformer<Mutation, C>() {
            public List<Mutation> apply(CellGroup<C> group) throws CellExtractorException {
               Mutation m1 = new Mutation(rowId);
               List<Mutation> mutations = Lists.newArrayList();
                for (C cell : group.getInternalList()) {
                    String colFam = CellReflector.getColFam(cell);
                    String qual = CellReflector.getLabelAsString(cell);
                    byte[] value = CellReflector.getValueBytesIfPrimative(cell);
                    m1.put(new Text(colFam), new Text(qual),new Value(value));
                }
                mutations.add(m1);
                return mutations;
            }
        };

View Full Code Here

      return;
    
    HashMap<Text,ColumnVisibility> vizMap = new HashMap<Text,ColumnVisibility>();
    
    for (Map.Entry<ByteBuffer,List<ColumnUpdate>> entry : cells.entrySet()) {
      Mutation m = new Mutation(new Text(ByteBufferUtil.toBytes(entry.getKey())));
      
      for (ColumnUpdate update : entry.getValue()) {
        ColumnVisibility viz = EMPTY_VIS;
        if (update.isSetColVisibility()) {
          Text vizText = new Text(update.getColVisibility());
          viz = vizMap.get(vizText);
          if (viz == null) {
            vizMap.put(vizText, viz = new ColumnVisibility(vizText));
          }
        }
        byte[] value = new byte[0];
        if (update.isSetValue())
          value = update.getValue();
        if (update.isSetTimestamp()) {
          if (update.isSetDeleteCell()) {
            m.putDelete(new Text(update.getColFamily()), new Text(update.getColQualifier()), viz, update.getTimestamp());
          } else {
              m.put(new Text(update.getColFamily()), new Text(update.getColQualifier()), viz, update.getTimestamp(), new Value(value));
            }
        } else {
          if (update.isSetDeleteCell()) {
            m.putDelete(new Text(update.getColFamily()), new Text(update.getColQualifier()), viz);
          } else {
            m.put(new Text(update.getColFamily()), new Text(update.getColQualifier()), viz, new Value(value));
          }
        }
      }
      try {
        bwpe.writer.addMutation(m);

View Full Code Here

          Key key = importIterator.getTopKey();
          Value value = importIterator.getTopValue();
          if (setTime) {
            key.setTimestamp(time);
          }
          Mutation mutation = new Mutation(key.getRow());
          if (!key.isDeleted()) {
            mutation.put(key.getColumnFamily(), key.getColumnQualifier(),
                new ColumnVisibility(key.getColumnVisibilityData().toArray()),
                key.getTimestamp(), value);
          } else {
            mutation.putDelete(key.getColumnFamily(), key.getColumnQualifier(),
                new ColumnVisibility(key.getColumnVisibilityData().toArray()),
                key.getTimestamp());
          }
          table.addMutation(mutation);
          importIterator.next();

View Full Code Here

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