com.amazonaws.services.dynamodbv2.model.BatchGetItemResult Java Examples

@Test
public void test_batchGetItem_WithAllParameters() throws Exception {
  String TEST_ATTRIBUTE_2 = "Attribute2";
  String TEST_ATTRIBUTE_VALUE_2 = "AttributeValue2";

  createTable();
  putItem(TEST_ATTRIBUTE, TEST_ATTRIBUTE_VALUE);
  putItem(TEST_ATTRIBUTE_2, TEST_ATTRIBUTE_VALUE_2);

  List<Map<String, AttributeValue>> keys = new ArrayList<Map<String, AttributeValue>>();
  Map<String, AttributeValue> key1 = new HashMap<String, AttributeValue>();
  key1.put(TEST_ATTRIBUTE, new AttributeValue()
    .withS(TEST_ATTRIBUTE_VALUE));
  keys.add(key1);
  Map<String, AttributeValue> key2 = new HashMap<String, AttributeValue>();
  key2.put(TEST_ATTRIBUTE_2, new AttributeValue()
    .withS(TEST_ATTRIBUTE_VALUE_2));
  keys.add(key2);

  Map<String, KeysAndAttributes> requestItems = new HashMap<String, KeysAndAttributes>();
  requestItems.put(TEST_TABLE_NAME, new KeysAndAttributes()
    .withKeys(keys));
  String returnConsumedCapacity = "";

  BatchGetItemResult result = dynamoDb.batchGetItem(requestItems,returnConsumedCapacity);
  String tableName = result.getResponses().keySet().toArray(new String[1])[0];
  List<Map<String, AttributeValue>> items = result.getResponses().get(tableName);
  AttributeValue value1 = items.get(0).get(TEST_ATTRIBUTE);
  AttributeValue value2 = items.get(1).get(TEST_ATTRIBUTE_2);

  assertThat(tableName, equalTo(TEST_TABLE_NAME));
  assertThat(items.size(), equalTo(keys.size()));
  assertThat(value1.getS(), equalTo(TEST_ATTRIBUTE_VALUE));
  assertThat(value2.getS(), equalTo(TEST_ATTRIBUTE_VALUE_2));
}
 

public Iterator<GeoWaveRow> getRowsFromDataIndex(
    final byte[][] dataIds,
    final short adapterId,
    final String typeName) {
  final Map<ByteArray, GeoWaveRow> resultMap = new HashMap<>();
  final Iterator<byte[]> dataIdIterator = Arrays.stream(dataIds).iterator();
  while (dataIdIterator.hasNext()) {
    // fill result map
    final Collection<Map<String, AttributeValue>> dataIdsForRequest = new ArrayList<>();
    int i = 0;
    while (dataIdIterator.hasNext() && (i < MAX_ROWS_FOR_BATCHGETITEM)) {
      dataIdsForRequest.add(
          Collections.singletonMap(
              DynamoDBRow.GW_PARTITION_ID_KEY,
              new AttributeValue().withB(ByteBuffer.wrap(dataIdIterator.next()))));
      i++;
    }
    BatchGetItemResult result =
        getResults(
            Collections.singletonMap(
                typeName + "_" + getQualifiedTableName(DataIndexUtils.DATA_ID_INDEX.getName()),
                new KeysAndAttributes().withKeys(dataIdsForRequest)),
            adapterId,
            resultMap);
    while (!result.getUnprocessedKeys().isEmpty()) {
      result = getResults(result.getUnprocessedKeys(), adapterId, resultMap);
    }
  }
  return Arrays.stream(dataIds).map(d -> resultMap.get(new ByteArray(d))).filter(
      r -> r != null).iterator();
}
 

private BatchGetItemResult getResults(
    final Map<String, KeysAndAttributes> requestItems,
    final short adapterId,
    final Map<ByteArray, GeoWaveRow> resultMap) {
  final BatchGetItemRequest request = new BatchGetItemRequest(requestItems);

  final BatchGetItemResult result = client.batchGetItem(request);
  result.getResponses().values().forEach(results -> results.stream().forEach(objMap -> {
    final byte[] dataId = objMap.get(DynamoDBRow.GW_PARTITION_ID_KEY).getB().array();
    final AttributeValue valueAttr = objMap.get(DynamoDBRow.GW_VALUE_KEY);
    final byte[] value = valueAttr == null ? null : valueAttr.getB().array();
    final AttributeValue visAttr = objMap.get(DynamoDBRow.GW_VISIBILITY_KEY);
    final byte[] vis = visAttr == null ? new byte[0] : visAttr.getB().array();
    resultMap.put(
        new ByteArray(dataId),
        DataIndexUtils.deserializeDataIndexRow(dataId, adapterId, value, vis));
  }));
  return result;
}
 

private void testBatchGetItemsContainsItem(
        final TransactionManagerDynamoDBFacade facade,
        final Map<String, AttributeValue> item,
        final boolean filterAttributes) {
    BatchGetItemRequest batchGetItemRequest = createBatchGetItemRequest(filterAttributes);
    BatchGetItemResult batchGetItemResult = facade.batchGetItem(batchGetItemRequest);
    List<Map<String, AttributeValue>> items = batchGetItemResult.getResponses().get(INTEG_HASH_TABLE_NAME);
    assertEquals(1, items.size());
    assertContainsNoTransactionAttributes(items.get(0));
    assertEquals(item, items.get(0));
}
 

private void testBatchGetItemsIsEmpty(final TransactionManagerDynamoDBFacade facade) {
    BatchGetItemRequest batchGetItemRequest = createBatchGetItemRequest(false);
    BatchGetItemResult batchGetItemResult = facade.batchGetItem(batchGetItemRequest);
    assertNotNull(batchGetItemResult.getResponses());
    assertEquals(1, batchGetItemResult.getResponses().size());
    assertNotNull(batchGetItemResult.getResponses().get(INTEG_HASH_TABLE_NAME));
    assertEquals(0, batchGetItemResult.getResponses().get(INTEG_HASH_TABLE_NAME).size());

}
 

@Override
public BatchGetItemResult batchGetItem(
        Map<String, KeysAndAttributes> requestItems,
        String returnConsumedCapacity) throws AmazonServiceException,
        AmazonClientException {
    BatchGetItemRequest request = new BatchGetItemRequest()
            .withRequestItems(requestItems)
            .withReturnConsumedCapacity(returnConsumedCapacity);
    return batchGetItem(request);
}
 

@Override
public BatchGetItemResult batchGetItem(
        Map<String, KeysAndAttributes> requestItems)
        throws AmazonServiceException, AmazonClientException {
    BatchGetItemRequest request = new BatchGetItemRequest()
            .withRequestItems(requestItems);
    return batchGetItem(request);
}
 

@Override
public BatchGetItemResult batchGetItem(
        Map<String, KeysAndAttributes> requestItems,
        String returnConsumedCapacity) throws AmazonServiceException,
        AmazonClientException {
    throw new UnsupportedOperationException("Use the underlying client instance instead");
}
 

@Override
public BatchGetItemResult batchGetItem(BatchGetItemRequest batchGetItemRequest) {
	throw new UnsupportedOperationException();
}
 

@Override
public BatchGetItemResult batchGetItem(Map<String, KeysAndAttributes> requestItems, String returnConsumedCapacity) {
	throw new UnsupportedOperationException();
}
 

@Override
public BatchGetItemResult batchGetItem(Map<String, KeysAndAttributes> requestItems) {
	throw new UnsupportedOperationException();
}
 

@Override
public BatchGetItemResult batchGetItem(BatchGetItemRequest request) throws AmazonServiceException, AmazonClientException {
    return getBackend().batchGetItem(request);
}
 

@Override
public BatchGetItemResult batchGetItem(Map<String, KeysAndAttributes> requestItems, String returnConsumedCapacity) throws AmazonServiceException, AmazonClientException {
    return getBackend().batchGetItem(requestItems, returnConsumedCapacity);
}
 

@Override
public BatchGetItemResult batchGetItem(Map<String, KeysAndAttributes> requestItems) throws AmazonServiceException, AmazonClientException {
    return getBackend().batchGetItem(requestItems);
}
 

@Override
public BatchGetItemResult batchGetItem(BatchGetItemRequest arg0)
        throws AmazonServiceException, AmazonClientException {
    throw new UnsupportedOperationException("Use the underlying client instance instead");
}
 

@Override
public BatchGetItemResult batchGetItem(
        Map<String, KeysAndAttributes> requestItems)
        throws AmazonServiceException, AmazonClientException {
    throw new UnsupportedOperationException("Use the underlying client instance instead");
}