Examples of org.apache.hadoop.hbase.client.Get

org.apache.hadoop.hbase.client.Get
Used to perform Get operations on a single row.
To get everything for a row, instantiate a Get object with the row to get. To further define the scope of what to get, perform additional methods as outlined below.
To get all columns from specific families, execute {@link #addFamily(byte[]) addFamily}for each family to retrieve.
To get specific columns, execute {@link #addColumn(byte[],byte[]) addColumn}for each column to retrieve.
To only retrieve columns within a specific range of version timestamps, execute {@link #setTimeRange(long,long) setTimeRange}.
To only retrieve columns with a specific timestamp, execute {@link #setTimeStamp(long) setTimestamp}.
To limit the number of versions of each column to be returned, execute {@link #setMaxVersions(int) setMaxVersions}.
To add a filter, execute {@link #setFilter(Filter) setFilter}.

   */
  public static List<KeyValue> getFromStoreFile(Store store,
                                                byte [] row,
                                                NavigableSet<byte[]> columns
                                                ) throws IOException {
    Get get = new Get(row);
    Map<byte[], NavigableSet<byte[]>> s = get.getFamilyMap();
    s.put(store.getFamily().getName(), columns);


    return getFromStoreFile(store,get);
  }

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      Store store = getStore(family);
      // get the closest key. (HStore.getRowKeyAtOrBefore can return null)
      KeyValue key = store.getRowKeyAtOrBefore(row);
      Result result = null;
      if (key != null) {
        Get get = new Get(key.getRow());
        get.addFamily(family);
        result = get(get, null);
      }
      if (coprocessorHost != null) {
        coprocessorHost.postGetClosestRowBefore(row, family, result);
      }

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          } else {
            kvCount.put(qual, count + 1);
          }
          count = kvCount.get(qual);


          Get get = new Get(kv.getRow());
          get.setMaxVersions(count);
          get.addColumn(family, qual);


          List<KeyValue> result = get(get, false);


          if (result.size() < count) {
            // Nothing to delete

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    startRegionOperation();
    this.writeRequestsCount.increment();
    this.opMetrics.setWriteRequestCountMetrics(this.writeRequestsCount.get());
    try {
      RowLock lock = isPut ? ((Put)w).getRowLock() : ((Delete)w).getRowLock();
      Get get = new Get(row, lock);
      checkFamily(family);
      get.addColumn(family, qualifier);


      // Lock row
      Integer lid = getLock(lockId, get.getRow(), true);
      // wait for all previous transactions to complete (with lock held)
      mvcc.completeMemstoreInsert(mvcc.beginMemstoreInsert());
      List<KeyValue> result = new ArrayList<KeyValue>();
      try {
        result = get(get, false);

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          Store store = stores.get(family.getKey());
          List<KeyValue> kvs = new ArrayList<KeyValue>(family.getValue().size());


          // Get previous values for all columns in this family
          Get get = new Get(row);
          for (KeyValue kv : family.getValue()) {
            get.addColumn(family.getKey(), kv.getQualifier());
          }
          List<KeyValue> results = get(get, false);


          // Iterate the input columns and update existing values if they were
          // found, otherwise add new column initialized to the append value

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          Store store = stores.get(family.getKey());
          List<KeyValue> kvs = new ArrayList<KeyValue>(family.getValue().size());


          // Get previous values for all columns in this family
          Get get = new Get(row);
          for (Map.Entry<byte [], Long> column : family.getValue().entrySet()) {
            get.addColumn(family.getKey(), column.getKey());
          }
          get.setTimeRange(tr.getMin(), tr.getMax());
          List<KeyValue> results = get(get, false);


          // Iterate the input columns and update existing values if they were
          // found, otherwise add new column initialized to the increment amount
          int idx = 0;

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      lock(this.updatesLock.readLock());
      try {
        Store store = stores.get(family);


        // Get the old value:
        Get get = new Get(row);
        get.addColumn(family, qualifier);


        // we don't want to invoke coprocessor in this case; ICV is wrapped
        // in HRegionServer, so we leave getLastIncrement alone
        List<KeyValue> results = get(get, false);

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  @Test
  public void testRead() throws Exception {
    // get action
    PrivilegedExceptionAction getAction = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        Get g = new Get(Bytes.toBytes("random_row"));
        g.addFamily(TEST_FAMILY);
        HTable t = new HTable(conf, TEST_TABLE);
        try {
          t.get(g);
        } finally {
          t.close();

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        return null;
      }
    };
    PrivilegedExceptionAction getActionAll = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        Get g = new Get(Bytes.toBytes("random_row"));
        g.addFamily(family1);
        g.addFamily(family2);
        HTable t = new HTable(conf, tableName);
        try {
          t.get(g);
        } finally {
          t.close();
        }
        return null;
      }
    };
    PrivilegedExceptionAction getAction1 = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        Get g = new Get(Bytes.toBytes("random_row"));
        g.addFamily(family1);
        HTable t = new HTable(conf, tableName);
        try {
          t.get(g);
        } finally {
          t.close();
        }
        return null;
      }
    };
    PrivilegedExceptionAction getAction2 = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        Get g = new Get(Bytes.toBytes("random_row"));
        g.addFamily(family2);
        HTable t = new HTable(conf, tableName);
        try {
          t.get(g);
        } finally {
          t.close();

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    // create temp users
    User user = User.createUserForTesting(TEST_UTIL.getConfiguration(), "user", new String[0]);


    PrivilegedExceptionAction getQualifierAction = new PrivilegedExceptionAction() {
      public Object run() throws Exception {
        Get g = new Get(Bytes.toBytes("random_row"));
        g.addColumn(family1, qualifier);
        HTable t = new HTable(conf, tableName);
        try {
          t.get(g);
        } finally {
          t.close();

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