Examples of com.amazonaws.services.dynamodbv2.model.WriteRequest

Package com.amazonaws.services.dynamodbv2.model

Examples of com.amazonaws.services.dynamodbv2.model.WriteRequest

com.amazonaws.services.dynamodbv2.model.ExpectedAttributeValue

Represents an operation to perform - either DeleteItem or PutItem . You can only specify one of these operations, not both, in a single WriteRequest . If you do need to perform both of these operations, you will need to specify two separate WriteRequest objects.

                    .withN(item.get(key).getN())
                    .withNS(item.get(key).getNS())
                    .withS(item.get(key).getS())
                    .withSS(item.get(key).getSS());
            } else {
                updateValues.put(key, new AttributeValueUpdate(item.get(key), "PUT"));
            }
        }
        return updateValues;
    }

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    private void processBatchGetRequest(Map<String, Class<?>> classesByTableName,
                                        Map<String, KeysAndAttributes> requestItems,
                                        Map<String, List<Object>> resultSet) {


        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {

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    private void processBatchGetRequest(Map<String, Class<?>> classesByTableName,
                                        Map<String, KeysAndAttributes> requestItems,
                                        Map<String, List<Object>> resultSet) {


        BatchGetItemResult batchGetItemResult = null;
        BatchGetItemRequest batchGetItemRequest = new BatchGetItemRequest();
        batchGetItemRequest.setRequestItems(requestItems);
        do {
            if ( batchGetItemResult != null ) {
                batchGetItemRequest.setRequestItems(batchGetItemResult.getUnprocessedKeys());
            }


            batchGetItemResult = db.batchGetItem(batchGetItemRequest);
            Map<String, List<Map<String, AttributeValue>>> responses = batchGetItemResult.getResponses();
            for ( String tableName : responses.keySet() ) {
                List<Object> objects = null;
                if ( resultSet.get(tableName) != null ) {
                    objects = resultSet.get(tableName);
                } else {
                    objects = new LinkedList<Object>();
                }


                for ( Map<String, AttributeValue> item : responses.get(tableName) ) {
                    objects.add(marshallIntoObject(classesByTableName.get(tableName), item));
                }


                resultSet.put(tableName, objects);
            }
            // To see whether there are unprocessed keys.
        } while ( batchGetItemResult.getUnprocessedKeys() != null && batchGetItemResult.getUnprocessedKeys().size() > 0 );


    }

View Full Code Here

        BatchWriteItemResult result = null;
        int retries = 0;
        FailedBatch failedBatch = null;
        while (true) {
            try {
                result = db.batchWriteItem(new BatchWriteItemRequest().withRequestItems(batch));
            } catch (Exception e) {
                failedBatch = new FailedBatch();
                failedBatch.setUnprocessedItems(batch);
                failedBatch.setException(e);
                return failedBatch;

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     * Continue trying to process the batch until it finishes or an exception
     * occurs.
     */


    private FailedBatch callUntilCompletion(Map<String, List<WriteRequest>> batch) {
        BatchWriteItemResult result = null;
        int retries = 0;
        FailedBatch failedBatch = null;
        while (true) {
            try {
                result = db.batchWriteItem(new BatchWriteItemRequest().withRequestItems(batch));
            } catch (Exception e) {
                failedBatch = new FailedBatch();
                failedBatch.setUnprocessedItems(batch);
                failedBatch.setException(e);
                return failedBatch;
            }
            retries++;
            batch = result.getUnprocessedItems();
            if (batch.size() > 0) {
                pauseExponentially(retries);
            } else {
                break;
            }

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        Map<String, Condition> conditions = new HashMap<String, Condition>();
        for ( Method getter : reflector.getKeyGetters(obj.getClass()) ) {
            if ( getter.isAnnotationPresent(DynamoDBHashKey.class) ) {
                conditions.put(
                        reflector.getAttributeName(getter),
                        new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(
                                getSimpleAttributeValue(getter, safeInvoke(getter, obj, (Object[])null))));
            }
        }
        return conditions;
    }

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                    break;
                }
            }
        }


        db.deleteItem(applyUserAgent(new DeleteItemRequest().withKey(key).withTableName(tableName).withExpected(expectedValues)));
    }

View Full Code Here

            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(key)));
        }


        // Break into chunks of 25 items and make service requests to DynamoDB
        while ( !requestItems.isEmpty() ) {
            HashMap<String, List<WriteRequest>> batch = new HashMap<String, List<WriteRequest>>();

View Full Code Here

        Map<String, ExpectedAttributeValue> expectedValues = new HashMap<String, ExpectedAttributeValue>();


        String hashKeyAttributeName = reflector.getAttributeName(hashKeyGetter);
        Object hashGetterResult = safeInvoke(hashKeyGetter, object);
        attributes.put(hashKeyAttributeName, getSimpleAttributeValue(hashKeyGetter, hashGetterResult));
        expectedValues.put(hashKeyAttributeName, new ExpectedAttributeValue().withExists(false));


        if (rangeKeyGetter != null) {
            String rangeKeyAttributeName = reflector.getAttributeName(rangeKeyGetter);
            Object rangeGetterResult = safeInvoke(rangeKeyGetter, object);
            attributes.put(rangeKeyAttributeName, getSimpleAttributeValue(rangeKeyGetter, rangeGetterResult));
            expectedValues.put(rangeKeyAttributeName, new ExpectedAttributeValue().withExists(false));
        }
        attributes = transformAttributes(clazz, attributes);
        db.putItem(applyUserAgent(new PutItemRequest().withTableName(tableName).withItem(attributes)
                .withExpected(expectedValues)));
    }

View Full Code Here


                if ( reflector.isVersionAttributeGetter(method) ) {
                    Object getterResult = safeInvoke(method, object);
                    String attributeName = reflector.getAttributeName(method);


                    ExpectedAttributeValue expected = new ExpectedAttributeValue();
                    AttributeValue currentValue = getSimpleAttributeValue(method, getterResult);
                    expected.setExists(currentValue != null);
                    if ( currentValue != null )
                        expected.setValue(currentValue);
                    expectedValues.put(attributeName, expected);
                    break;
                }
            }
        }

View Full Code Here

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