Example usage for com.amazonaws.services.dynamodbv2.model AttributeValue AttributeValue

List of usage examples for com.amazonaws.services.dynamodbv2.model AttributeValue AttributeValue

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Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.model AttributeValue AttributeValue.

Prototype

public AttributeValue()

Source Link

Document

Default constructor for AttributeValue object.

Usage

From source file:AmazonDynamoDBSample_PutThrottled.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();/*  w  w w.  j  av a  2  s  . com*/

    try {
        String tableName = "my-favorite-movies-table";

        // Create a table with a primary hash key named 'name', which holds
        // a string
        CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(tableName)
                .withKeySchema(new KeySchemaElement().withAttributeName("name").withKeyType(KeyType.HASH))
                .withAttributeDefinitions(new AttributeDefinition().withAttributeName("name")
                        .withAttributeType(ScalarAttributeType.S))
                .withProvisionedThroughput(
                        new ProvisionedThroughput().withReadCapacityUnits(1L).withWriteCapacityUnits(1L));

        // Create table if it does not exist yet
        TableUtils.createTableIfNotExists(dynamoDB, createTableRequest);
        // wait for the table to move into ACTIVE state
        TableUtils.waitUntilActive(dynamoDB, tableName);

        // Describe our new table
        DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(tableName);
        TableDescription tableDescription = dynamoDB.describeTable(describeTableRequest).getTable();
        System.out.println("Table Description: " + tableDescription);

        // Add an item
        Map<String, AttributeValue> item = newItem("Bill & Ted's Excellent Adventure", 1989, "****", "James",
                "Sara");
        PutItemRequest putItemRequest = new PutItemRequest(tableName, item);
        PutItemResult putItemResult = dynamoDB.putItem(putItemRequest);
        System.out.println("Result: " + putItemResult);

        // Add another item
        item = newItem("Airplane", 1980, "*****", "James", "Billy Bob");
        putItemRequest = new PutItemRequest(tableName, item);
        putItemResult = dynamoDB.putItem(putItemRequest);
        System.out.println("Result: " + putItemResult);

        Thread[] thrds = new Thread[16];
        for (int i = 0; i < thrds.length; i++) {
            thrds[i] = newItemCreationThread(tableName, i);
            thrds[i].start();
        }
        for (Thread thrd : thrds) {
            thrd.join();
        }

        // Scan items for movies with a year attribute greater than 1985
        HashMap<String, Condition> scanFilter = new HashMap<String, Condition>();
        Condition condition = new Condition().withComparisonOperator(ComparisonOperator.GT.toString())
                .withAttributeValueList(new AttributeValue().withN("1985"));
        scanFilter.put("year", condition);
        ScanRequest scanRequest = new ScanRequest(tableName).withScanFilter(scanFilter);
        ScanResult scanResult = dynamoDB.scan(scanRequest);
        System.out.println("Result: " + scanResult);

    } catch (AmazonServiceException ase) {
        System.out.println("Caught an AmazonServiceException, which means your request made it "
                + "to AWS, but was rejected with an error response for some reason.");
        System.out.println("Error Message:    " + ase.getMessage());
        System.out.println("HTTP Status Code: " + ase.getStatusCode());
        System.out.println("AWS Error Code:   " + ase.getErrorCode());
        System.out.println("Error Type:       " + ase.getErrorType());
        System.out.println("Request ID:       " + ase.getRequestId());
    } catch (AmazonClientException ace) {
        System.out.println("Caught an AmazonClientException, which means the client encountered "
                + "a serious internal problem while trying to communicate with AWS, "
                + "such as not being able to access the network.");
        System.out.println("Error Message: " + ace.getMessage());
    }
}

From source file:NYSEScan.java

License:Open Source License

private static void scan(String tableName) {
    Table table = null;//from   w  w w  .j  a  va2s.  co m
    try {
        // Create table if it does not exist yet
        if (!Tables.doesTableExist(dynamoDB, tableName)) {
            System.out.println("Table " + tableName + " is does not exist");
        } else {
            table = dynamo.getTable(tableName);
        }
        // select * from stock_eod where stockTicker = 'HCA' and v > 1000000;
        // http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html
        Map<String, AttributeValue> expressionAttributeValues = new HashMap<String, AttributeValue>();
        expressionAttributeValues.put(":val", new AttributeValue().withN("1000000"));

        //Below is not recommended as stockTicker is part of the key
        expressionAttributeValues.put(":st", new AttributeValue().withS("HCA"));

        ScanRequest scanRequest = new ScanRequest().withTableName(tableName)
                .withFilterExpression("v > :val and stockTicker = :st")
                // select stockTicker, tradeDate, v from stock_eod where stockTicker = 'HCA' and v > 1000000;
                .withProjectionExpression("stockTicker,tradeDate,v")
                .withExpressionAttributeValues(expressionAttributeValues);

        ScanResult result = dynamoDB.scan(scanRequest);

        for (Map<String, AttributeValue> item : result.getItems()) {
            System.out.println(item);
        }

    } catch (AmazonServiceException ase) {
        System.out.println("Caught an AmazonServiceException, which means your request made it "
                + "to AWS, but was rejected with an error response for some reason.");
        System.out.println("Error Message:    " + ase.getMessage());
        System.out.println("HTTP Status Code: " + ase.getStatusCode());
        System.out.println("AWS Error Code:   " + ase.getErrorCode());
        System.out.println("Error Type:       " + ase.getErrorType());
        System.out.println("Request ID:       " + ase.getRequestId());
    } catch (AmazonClientException ace) {
        System.out.println("Caught an AmazonClientException, which means the client encountered "
                + "a serious internal problem while trying to communicate with AWS, "
                + "such as not being able to access the network.");
        System.out.println("Error Message: " + ace.getMessage());
    }
}

From source file:KinesisMessageModelDynamoDBTransformer.java

License:Open Source License

/**
 * Helper method to map nonempty String attributes to an AttributeValue.
 *
 * @param item The map of attribute names to AttributeValues to store the attribute in
 * @param key The key to store in the map
 * @param value The value to check before inserting into the item map
 *//* w ww.  j  av a2 s. co  m*/
private void putStringIfNonempty(Map<String, AttributeValue> item, String key, String value) {
    if (!value.equals(null) && !value.isEmpty()) {
        item.put(key, new AttributeValue().withS(value));
    }
}

From source file:DynamoDB.java

License:Open Source License

private static Map<String, AttributeValue> newItem(String Id, String message) {
    Map<String, AttributeValue> item = new HashMap<String, AttributeValue>();
    //item.put("Id", new AttributeValue().withS(message));
    item.put("Id", new AttributeValue().withS(Id));
    item.put("message", new AttributeValue().withS(message));
    return item;/* w w  w  .  j  a v a 2  s  .  com*/
}

From source file:AmazonDynamoDBSample.java

License:Open Source License

private static Map<String, AttributeValue> newItem(int id, String name, String desc, ByteBuffer image,
        Timestamp storyTime, Timestamp currentTime, double lati, double longi) {
    Map<String, AttributeValue> item = new HashMap<String, AttributeValue>();
    item.put("storyID", new AttributeValue().withN(Integer.toString(id)));
    item.put("name", new AttributeValue(name));
    item.put("desc", new AttributeValue(desc));
    //        ByteBuffer b =  createBody();
    item.put("image", new AttributeValue().withB(image));
    item.put("storyTime", new AttributeValue().withS(String.valueOf(storyTime)));
    item.put("currentTime", new AttributeValue().withS(String.valueOf(currentTime)));
    item.put("lati", new AttributeValue().withN(Double.toString(lati)));
    item.put("longi", new AttributeValue().withN(Double.toString(longi)));

    return item;/*  w  w w. java 2s  .c o  m*/
}

From source file:RandomQuery1OnDynamoDB.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();//  w  w w.  j a v a2 s. c  om

    try {

        // Describe our new table
        DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(tableName);
        TableDescription tableDescription = dynamoDB.describeTable(describeTableRequest).getTable();
        System.out.println("Table Description: " + tableDescription);

        System.out.println("Table count :" + tableDescription.getItemCount());

        long lStartTime = new Date().getTime();
        System.out.println("start time: " + lStartTime);
        Random rn = new Random();
        // Scan items for movies with a year attribute greater than 1985
        Long lItem = tableDescription.getItemCount();
        int iNoOfItems = lItem.intValue();
        System.out.println("no of item " + lItem);
        for (int i = 0; i <= 49999; i++) {
            String randomInt = Integer.toString(rn.nextInt(iNoOfItems));
            HashMap<String, Condition> scanFilter = new HashMap<String, Condition>();
            Condition condition = new Condition().withComparisonOperator(ComparisonOperator.EQ.toString())
                    .withAttributeValueList(new AttributeValue().withN(randomInt));
            scanFilter.put("id", condition);
            ScanRequest scanRequest = new ScanRequest(tableName).withScanFilter(scanFilter);
            ScanResult scanResult = dynamoDB.scan(scanRequest);
            System.out.println("Random No :" + randomInt + ":: Query no: " + (i + 1));

        }
        // calculate time difference for update file time
        long lEndTime = new Date().getTime();
        long difference = lEndTime - lStartTime;
        System.out.println("Elapsed milliseconds: " + difference);
        System.out.println("Elapsed seconds: " + difference * 0.001);
        System.out.println("Elapsed Minutes: " + (int) ((difference / (1000 * 60)) % 60));

    } catch (AmazonServiceException ase) {
        System.out.println("Caught an AmazonServiceException, which means your request made it "
                + "to AWS, but was rejected with an error response for some reason.");
        System.out.println("Error Message:    " + ase.getMessage());
        System.out.println("HTTP Status Code: " + ase.getStatusCode());
        System.out.println("AWS Error Code:   " + ase.getErrorCode());
        System.out.println("Error Type:       " + ase.getErrorType());
        System.out.println("Request ID:       " + ase.getRequestId());
    } catch (AmazonClientException ace) {
        System.out.println("Caught an AmazonClientException, which means the client encountered "
                + "a serious internal problem while trying to communicate with AWS, "
                + "such as not being able to access the network.");
        System.out.println("Error Message: " + ace.getMessage());
    }
}

From source file:RandomQuery2OnDynamoDB.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();//ww w  .  j av  a  2 s  .  co  m

    try {

        // Describe our new table
        DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(tableName);
        TableDescription tableDescription = dynamoDB.describeTable(describeTableRequest).getTable();
        System.out.println("Table Description: " + tableDescription);
        long lStartTime = new Date().getTime();
        System.out.println("start time: " + lStartTime);
        Random rn = new Random();
        Long lItem = tableDescription.getItemCount();
        int iNoOfItems = lItem.intValue();
        int iPointOnePercent = (int) ((int) iNoOfItems * 0.001);
        int iOnePercent = (int) ((int) iNoOfItems * 0.01);
        System.out.println("TotalItems:" + iNoOfItems + "::0.1% of data is :: " + iPointOnePercent
                + "::1% of data is :" + iOnePercent);

        // Generating 25000 random queries for 0.1 to 1 % of the data
        for (int i = 0; i <= 24999; i++) {
            String randomInt = Integer.toString(rn.nextInt(iOnePercent - iPointOnePercent) + iPointOnePercent);
            HashMap<String, Condition> scanFilter = new HashMap<String, Condition>();
            Condition condition = new Condition().withComparisonOperator(ComparisonOperator.EQ.toString())
                    .withAttributeValueList(new AttributeValue().withN(randomInt));
            scanFilter.put("id", condition);
            ScanRequest scanRequest = new ScanRequest(tableName).withScanFilter(scanFilter);
            ScanResult scanResult = dynamoDB.scan(scanRequest);
            System.out.println("Random No :" + randomInt + ":: Query no: " + (i + 1));

        }
        // calculate time difference for update file time
        long lEndTime = new Date().getTime();
        long difference = lEndTime - lStartTime;
        System.out.println("Elapsed milliseconds: " + difference);
        System.out.println("Elapsed seconds: " + difference * 0.001);
        System.out.println("Elapsed Minutes: " + (int) ((difference / (1000 * 60)) % 60));

    } catch (AmazonServiceException ase) {
        System.out.println("Caught an AmazonServiceException, which means your request made it "
                + "to AWS, but was rejected with an error response for some reason.");
        System.out.println("Error Message:    " + ase.getMessage());
        System.out.println("HTTP Status Code: " + ase.getStatusCode());
        System.out.println("AWS Error Code:   " + ase.getErrorCode());
        System.out.println("Error Type:       " + ase.getErrorType());
        System.out.println("Request ID:       " + ase.getRequestId());
    } catch (AmazonClientException ace) {
        System.out.println("Caught an AmazonClientException, which means the client encountered "
                + "a serious internal problem while trying to communicate with AWS, "
                + "such as not being able to access the network.");
        System.out.println("Error Message: " + ace.getMessage());
    }
}

From source file:amazon.dynamodb.config.DynamoDBManager.java

License:Open Source License

/**
 * Query Amazon DynamoDB//ww  w  . j  a va 2 s .co m
 *
 * @param hashKey Hash key for the query request.
 *
 * @param range The range of geohashs to query.
 *
 * @return The query result.
 */
public List<QueryResult> queryGeohash(QueryRequest queryRequest, long hashKey, GeoHashRango range) {
    List<QueryResult> queryResults = new ArrayList<QueryResult>();
    Map<String, AttributeValue> lastEvaluatedKey = null;

    do {
        Map<String, Condition> keyConditions = new HashMap<String, Condition>();

        Condition hashKeyCondition = new Condition().withComparisonOperator(ComparisonOperator.EQ)
                .withAttributeValueList(new AttributeValue().withN(String.valueOf(hashKey)));
        keyConditions.put(config.getHashKeyAttributeName(), hashKeyCondition);

        AttributeValue minRange = new AttributeValue().withN(Long.toString(range.getRangeMin()));
        AttributeValue maxRange = new AttributeValue().withN(Long.toString(range.getRangeMax()));

        Condition geohashCondition = new Condition().withComparisonOperator(ComparisonOperator.BETWEEN)
                .withAttributeValueList(minRange, maxRange);
        keyConditions.put(config.getGeohashAttributeName(), geohashCondition);

        queryRequest.withTableName(config.getTableName()).withKeyConditions(keyConditions)
                .withIndexName(config.getGeohashIndexName()).withConsistentRead(true)
                .withReturnConsumedCapacity(ReturnConsumedCapacity.TOTAL)
                .withExclusiveStartKey(lastEvaluatedKey);

        QueryResult queryResult = config.getDynamoDBClient().query(queryRequest);
        queryResults.add(queryResult);

        lastEvaluatedKey = queryResult.getLastEvaluatedKey();

    } while (lastEvaluatedKey != null);

    return queryResults;
}

From source file:amazon.dynamodb.config.DynamoDBManager.java

License:Open Source License

public GetPointResult getPoint(GetPointRequest getPointRequest) {
    long geohash = S2Manager.generateGeohash(getPointRequest.getGeoPoint());
    long hashKey = S2Manager.generateHashKey(geohash, config.getHashKeyLength());

    GetItemRequest getItemRequest = getPointRequest.getGetItemRequest();
    getItemRequest.setTableName(config.getTableName());

    AttributeValue hashKeyValue = new AttributeValue().withN(String.valueOf(hashKey));
    getItemRequest.getKey().put(config.getHashKeyAttributeName(), hashKeyValue);
    getItemRequest.getKey().put(config.getRangeKeyAttributeName(), getPointRequest.getRangeKeyValue());

    GetItemResult getItemResult = config.getDynamoDBClient().getItem(getItemRequest);
    GetPointResult getPointResult = new GetPointResult(getItemResult);

    return getPointResult;
}

From source file:amazon.dynamodb.config.DynamoDBManager.java

License:Open Source License

public PutPointResult putPoint(PutPointRequest putPointRequest) {
    long geohash = S2Manager.generateGeohash(putPointRequest.getGeoPoint());
    long hashKey = S2Manager.generateHashKey(geohash, config.getHashKeyLength());
    String geoJson = GeoJsonMapper.stringFromGeoObject(putPointRequest.getGeoPoint());

    PutItemRequest putItemRequest = putPointRequest.getPutItemRequest();
    putItemRequest.setTableName(config.getTableName());

    AttributeValue hashKeyValue = new AttributeValue().withN(String.valueOf(hashKey));
    putItemRequest.getItem().put(config.getHashKeyAttributeName(), hashKeyValue);
    putItemRequest.getItem().put(config.getRangeKeyAttributeName(), putPointRequest.getRangeKeyValue());
    AttributeValue geohashValue = new AttributeValue().withN(Long.toString(geohash));
    putItemRequest.getItem().put(config.getGeohashAttributeName(), geohashValue);
    AttributeValue geoJsonValue = new AttributeValue().withS(geoJson);
    putItemRequest.getItem().put(config.getGeoJsonAttributeName(), geoJsonValue);

    PutItemResult putItemResult = config.getDynamoDBClient().putItem(putItemRequest);
    PutPointResult putPointResult = new PutPointResult(putItemResult);

    return putPointResult;
}