Examples of com.amazonaws.services.dynamodb.model.BatchWriteItemRequest

Package com.amazonaws.services.dynamodb.model

Examples of com.amazonaws.services.dynamodb.model.BatchWriteItemRequest

com.amazonaws.services.dynamodb.model.BatchWriteItemRequest
Container for the parameters to the {@link com.amazonaws.services.dynamodb.AmazonDynamoDB#batchWriteItem(BatchWriteItemRequest) BatchWriteItem operation}.
Allows to execute a batch of Put and/or Delete Requests for many tables in a single call. A total of 25 requests are allowed.

There are no transaction guarantees provided by this API. It does not allow conditional puts nor does it support return values.
@see com.amazonaws.services.dynamodb.AmazonDynamoDB#batchWriteItem(BatchWriteItemRequest)

import java.util.List;


public class BatchWriteItemRequestJsonUnmarshaller implements Unmarshaller<BatchWriteItemRequest, JsonUnmarshallerContext> {


    public BatchWriteItemRequest unmarshall(JsonUnmarshallerContext context) throws Exception {
        BatchWriteItemRequest request = new BatchWriteItemRequest();


        int originalDepth = context.getCurrentDepth();
        int targetDepth = originalDepth + 1;


        JsonToken token = context.currentToken;
        if (token == null) token = context.nextToken();


        while (true) {
            if (token == null) break;


            if (token == JsonToken.FIELD_NAME || token == JsonToken.START_OBJECT) {
                if (context.testExpression("RequestItems", targetDepth)) {
                    request.setRequestItems(new MapUnmarshaller<String, List<WriteRequest>>(SimpleTypeJsonUnmarshallers.StringJsonUnmarshaller.getInstance(), new ListUnmarshaller<WriteRequest>(WriteRequestJsonUnmarshaller.getInstance())).unmarshall(context));
                }
            } else if (token == JsonToken.END_ARRAY || token == JsonToken.END_OBJECT) {
                if (context.getCurrentDepth() <= originalDepth) break;
            }
            token = context.nextToken();

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        Assert.assertNotNull("UnprocessedKeys should be empty rather than null.", result.getUnprocessedKeys());
  }


    @Test
    public void vanillaBatchWriteItemTest() throws Exception{
        BatchWriteItemRequest batchWriteItemRequest = new BatchWriteItemRequest();
        BatchWriteItemResult result;


        // Create a map for the requests in the batch
        Map<String, List<WriteRequest>> requestItems = new HashMap<String, List<WriteRequest>>();


        // Test: write items to database
        Map<String, AttributeValue> forumItem = new HashMap<String, AttributeValue>();
        forumItem.put(hashKeyValue1, new AttributeValue().withN("1"));
        forumItem.put("range", new AttributeValue().withS("a"));
        List<WriteRequest> forumList = new ArrayList<WriteRequest>();
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem)));


        Map<String, AttributeValue> forumItem1 = new HashMap<String, AttributeValue>();
        forumItem1.put(hashKeyValue1, new AttributeValue().withN("2"));
        forumItem1.put("range", new AttributeValue().withS("b"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem1)));


        Map<String, AttributeValue> forumItem5 = new HashMap<String, AttributeValue>();
        forumItem5.put(hashKeyValue1, new AttributeValue().withN("3"));
        forumItem5.put("range", new AttributeValue().withS("c"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem5)));


        Map<String, AttributeValue> forumItem2 = new HashMap<String, AttributeValue>();
        forumItem2.put(hashKeyValue1, new AttributeValue().withN("4"));
        forumItem2.put("range", new AttributeValue().withS("d"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem2)));


        Map<String, AttributeValue> forumItem3 = new HashMap<String, AttributeValue>();
        forumItem3.put(hashKeyValue1, new AttributeValue().withN("5"));
        forumItem3.put("range", new AttributeValue().withS("e"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem3)));


        Map<String, AttributeValue> forumItem4 = new HashMap<String, AttributeValue>();
        forumItem4.put(hashKeyValue1, new AttributeValue().withN("6"));
        forumItem4.put("range", new AttributeValue().withS("f"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem4)));


        //Test case: with duplicated hashkey item but distinguished range key input.
        Map<String, AttributeValue> forumItem6 = new HashMap<String, AttributeValue>();
        forumItem6.put(hashKeyValue1, new AttributeValue().withN("6"));
        forumItem6.put("range", new AttributeValue().withS("ff"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem6)));


        //Test case: Delete Request
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("7")))));
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("1")))));
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("4")))));
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("5")))));


        //Test case: Duplicated delete request
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("7")))));


        //Test on Table 2
        Map<String, AttributeValue> forumItemT2 = new HashMap<String, AttributeValue>();
        forumItemT2.put(hashKeyValue2, new AttributeValue().withN("1"));
        forumItemT2.put("range", new AttributeValue().withS("a"));
        List<WriteRequest> forumListT2 = new ArrayList<WriteRequest>();
        forumListT2.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItemT2)));


        requestItems.put(tableName1, forumList);
        requestItems.put(tableName2, forumListT2);
        do {
            System.out.println("Making the request.");


            batchWriteItemRequest.withRequestItems(requestItems);
            result = getClient().batchWriteItem(batchWriteItemRequest);


            // Print consumed capacity units
            for(Map.Entry<String, BatchWriteResponse> entry : result.getResponses().entrySet()) {
                String tableName1 = entry.getKey();

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                if ( !writeRequestIter.hasNext() ) {
                    tableIter.remove();
                }
            }


            BatchWriteItemResult result = db.batchWriteItem(new BatchWriteItemRequest().withRequestItems(batch));


            // add any unprocessed items back into the list to process
            for ( Entry<String, List<WriteRequest>> unprocessedItem : result.getUnprocessedItems().entrySet() ) {
                if ( !requestItems.containsKey(unprocessedItem.getKey()) ) {
                    requestItems.put(unprocessedItem.getKey(), new LinkedList<WriteRequest>());

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                if ( !writeRequestIter.hasNext() ) {
                    tableIter.remove();
                }
            }


            BatchWriteItemResult result = db.batchWriteItem(new BatchWriteItemRequest().withRequestItems(batch));


            // add any unprocessed items back into the list to process
            for ( Entry<String, List<WriteRequest>> unprocessedItem : result.getUnprocessedItems().entrySet() ) {
                if ( !requestItems.containsKey(unprocessedItem.getKey()) ) {
                    requestItems.put(unprocessedItem.getKey(), new LinkedList<WriteRequest>());

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                if ( !writeRequestIter.hasNext() ) {
                    tableIter.remove();
                }
            }


            BatchWriteItemResult result = db.batchWriteItem(new BatchWriteItemRequest().withRequestItems(batch));


            // add any unprocessed items back into the list to process
            for ( Entry<String, List<WriteRequest>> unprocessedItem : result.getUnprocessedItems().entrySet() ) {
                if ( !requestItems.containsKey(unprocessedItem.getKey()) ) {
                    requestItems.put(unprocessedItem.getKey(), new LinkedList<WriteRequest>());

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