Example usage for com.amazonaws.services.dynamodbv2.model ComparisonOperator GT

Introduction

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

Prototype

ComparisonOperator GT

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Usage

From source file:AmazonDynamoDBSample_PutThrottled.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();/*from   w  w w . j  ava 2  s. c o m*/

    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:br.com.faccilitacorretor.middleware.dynamo.AmazonDynamoDBSample.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();//from  www .j a  v a 2 s.  c o m

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

        // Create table if it does not exist yet
        if (Tables.doesTableExist(dynamoDB, tableName)) {
            System.out.println("Table " + tableName + " is already ACTIVE");
        } else {
            // 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));
            TableDescription createdTableDescription = dynamoDB.createTable(createTableRequest)
                    .getTableDescription();
            System.out.println("Created Table: " + createdTableDescription);

            // Wait for it to become active
            System.out.println("Waiting for " + tableName + " to become ACTIVE...");
            Tables.awaitTableToBecomeActive(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);

        // 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:com.alertlogic.aws.kinesis.test1.webserver.GetCountsServlet.java

License:Open Source License

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    MultiMap<String> params = new MultiMap<>();
    UrlEncoded.decodeTo(req.getQueryString(), params, "UTF-8");

    // We need both parameters to properly query for counts
    if (!params.containsKey(PARAMETER_RESOURCE) || !params.containsKey(PARAMETER_RANGE_IN_SECONDS)) {
        resp.setStatus(HttpServletResponse.SC_BAD_REQUEST);
        return;//from   w w  w  . j  a  va  2 s .c o  m
    }

    // Parse query string as a single integer - the number of seconds since "now" to query for new counts
    String resource = params.getString(PARAMETER_RESOURCE);
    int rangeInSeconds = Integer.parseInt(params.getString(PARAMETER_RANGE_IN_SECONDS));

    Calendar c = Calendar.getInstance();
    c.add(Calendar.SECOND, -1 * rangeInSeconds);
    Date startTime = c.getTime();
    if (LOG.isDebugEnabled()) {
        LOG.debug(String.format("Querying for counts of resource %s since %s", resource,
                DATE_FORMATTER.get().format(startTime)));
    }

    DynamoDBQueryExpression<HttpReferrerPairsCount> query = new DynamoDBQueryExpression<>();
    HttpReferrerPairsCount hashKey = new HttpReferrerPairsCount();
    hashKey.setResource(resource);
    query.setHashKeyValues(hashKey);

    Condition recentUpdates = new Condition().withComparisonOperator(ComparisonOperator.GT)
            .withAttributeValueList(new AttributeValue().withS(DATE_FORMATTER.get().format(startTime)));
    query.setRangeKeyConditions(Collections.singletonMap("timestamp", recentUpdates));

    List<HttpReferrerPairsCount> counts = mapper.query(HttpReferrerPairsCount.class, query);

    // Return the counts as JSON
    resp.setContentType("application/json");
    resp.setStatus(HttpServletResponse.SC_OK);
    JSON.writeValue(resp.getWriter(), counts);
}

---

From source file:com.boundary.aws.dynamodb.QueryDynamoDB.java

License:Open Source License

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

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

        // Create table if it does not exist yet
        if (Tables.doesTableExist(dynamoDB, tableName)) {
            System.out.println("Table " + tableName + " is already ACTIVE");
        } else {
            System.out.println("Table to query " + tableName + "does not exist");
        }

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

            Condition hashKeyCondition = new Condition().withComparisonOperator(ComparisonOperator.EQ)
                    .withAttributeValueList(new AttributeValue().withS("Matrix"));

            Map<String, Condition> keyConditions = new HashMap<String, Condition>();
            keyConditions.put("name", hashKeyCondition);

            QueryRequest queryRequest = new QueryRequest().withTableName(tableName)
                    .withKeyConditions(keyConditions);

            QueryResult queryResult = dynamoDB.query(queryRequest);
            System.out.println("Result: " + queryResult);

            Thread.sleep(5000);
        }

    } 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:com.github.sdmcraft.slingdynamo.demo.App.java

License:Open Source License

/**
 * Main1./*from ww w.  ja va2  s.c  om*/
 *
 * @param args the args
 * @throws Exception the exception
 */
public static void main1(String[] args) throws Exception {
    init();

    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));
        TableDescription createdTableDescription = dynamoDB.createTable(createTableRequest)
                .getTableDescription();
        System.out.println("Created Table: " + createdTableDescription);

        // Wait for it to become active
        waitForTableToBecomeAvailable(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);

        // 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:com.hussi.aws.dynamoDB.AmazonDynamoDBSample.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();/*from w  ww . ja  v  a2  s  .  c  o m*/

    try {
        String tableName = "hussi_first_dynamo_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);

        // 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:com.kinesis.datavis.servlet.GetBidRqCountsServlet.java

License:Open Source License

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    MultiMap<String> params = new MultiMap<>();
    UrlEncoded.decodeTo(req.getQueryString(), params, "UTF-8");

    // We need both parameters to properly query for counts
    if (!params.containsKey(PARAMETER_RESOURCE) || !params.containsKey(PARAMETER_RANGE_IN_SECONDS)) {
        resp.setStatus(HttpServletResponse.SC_BAD_REQUEST);
        return;// w w w  .  ja  v  a 2 s. c  o  m
    }

    // Parse query string as a single integer - the number of seconds since "now" to query for new counts
    String resource = params.getString(PARAMETER_RESOURCE);
    int rangeInSeconds = Integer.parseInt(params.getString(PARAMETER_RANGE_IN_SECONDS));

    Calendar c = Calendar.getInstance();
    c.add(Calendar.SECOND, -1 * rangeInSeconds);
    Date startTime = c.getTime();
    if (LOG.isDebugEnabled()) {
        LOG.debug(String.format("Querying for counts of resource %s since %s", resource,
                DATE_FORMATTER.get().format(startTime)));
    }

    DynamoDBQueryExpression<BidRequestCount> query = new DynamoDBQueryExpression<>();

    BidRequestCount hashKey = new BidRequestCount();
    hashKey.setHashKey(Ticker.getInstance().hashKey());

    query.setHashKeyValues(hashKey);

    Condition recentUpdates = new Condition().withComparisonOperator(ComparisonOperator.GT)
            .withAttributeValueList(new AttributeValue().withS(DATE_FORMATTER.get().format(startTime)));
    //        Condition attrFilter =
    //                new Condition().
    //                        withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS(resource));

    query.setRangeKeyConditions(Collections.singletonMap("timestamp", recentUpdates));
    //        query.setQueryFilter(Collections.singletonMap("wh", attrFilter));

    List<BidRequestCount> counts = mapper.query(BidRequestCount.class, query);

    //        System.out.println(counts.size());
    // Return the counts as JSON
    resp.setContentType("application/json");
    resp.setStatus(HttpServletResponse.SC_OK);
    JSON.writeValue(resp.getWriter(), counts);
}

---

From source file:com.kirana.dao.OrderDaoImpl.java

@Override
public List<Order> getOrderByShopId(long shopId) throws Exception {
    DynamoDBMapper mapper = new DynamoDBMapper(dbClient);

    Date startTime = new Date(0L);
    SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
    dateFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
    String startTimeStr = dateFormatter.format(startTime);

    Condition rangeKeyCondition = new Condition().withComparisonOperator(ComparisonOperator.GT.toString())
            .withAttributeValueList(new AttributeValue().withS(startTimeStr));

    DynamoDBQueryExpression<Order> queryExpression = new DynamoDBQueryExpression<Order>()
            .withHashKeyValues(new Order(shopId)).withRangeKeyCondition("created_at", rangeKeyCondition);
    queryExpression.setConsistentRead(false);

    return mapper.query(Order.class, queryExpression);

}

---

From source file:com.numenta.taurus.service.TaurusClient.java

License:Open Source License

/**
 * Get list of tweets for the given metric filtered by the given time range returning the
 * results as they become available asynchronously.
 *
 * @param metricName The metric name to retrieve the tweets from
 * @param from       The start time (aggregated) inclusive.
 * @param to         The end time (aggregated) inclusive.
 * @param callback   Callback for asynchronous call. It will be called on every {@link Tweet}
 *//* w ww .j  ava  2 s  .c  o  m*/
public void getTweets(String metricName, Date from, Date to, DataCallback<Tweet> callback)
        throws GrokException, IOException {
    if (metricName == null) {
        throw new ObjectNotFoundException("Cannot get tweets without metric name");
    }

    final TaurusDataFactory dataFactory = TaurusApplication.getInstance().getDataFactory();
    final SimpleDateFormat timestampFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.US);
    timestampFormat.setTimeZone(TimeZone.getTimeZone("UTC"));

    // Key conditions
    Map<String, Condition> keyConditions = new HashMap<>();

    // uid = modelId
    Condition modelIdCond = new Condition().withComparisonOperator(ComparisonOperator.EQ)
            .withAttributeValueList(new AttributeValue(metricName));
    keyConditions.put("metric_name", modelIdCond);

    Condition timestampCondition;
    if (from != null && to != null) {
        // timestamp >= from and timestamp <=to
        timestampCondition = new Condition().withComparisonOperator(ComparisonOperator.BETWEEN)
                .withAttributeValueList(new AttributeValue().withS(timestampFormat.format(from)),
                        new AttributeValue().withS(timestampFormat.format(to)));
        keyConditions.put("agg_ts", timestampCondition);
    } else if (from != null) {
        // timestamp >= from
        timestampCondition = new Condition().withComparisonOperator(ComparisonOperator.GT)
                .withAttributeValueList(new AttributeValue().withS(timestampFormat.format(from)));
        keyConditions.put("agg_ts", timestampCondition);
    } else if (to != null) {
        // timestamp <= to
        timestampCondition = new Condition().withComparisonOperator(ComparisonOperator.LT)
                .withAttributeValueList(new AttributeValue().withS(timestampFormat.format(to)));
        keyConditions.put("agg_ts", timestampCondition);
    }

    // Prepare query request
    QueryRequest query = new QueryRequest().withTableName(TWEETS_TABLE)
            .withAttributesToGet("tweet_uid", "userid", "text", "username", "agg_ts", "created_at",
                    "retweet_count")
            .withKeyConditions(keyConditions).withScanIndexForward(false)
            .withIndexName("taurus.metric_data-metric_name_index");

    QueryResult result;
    String tweetId;
    String userId;
    String userName;
    String text;
    Date created;
    Date aggregated;
    AttributeValue retweet;
    int retweetCount;
    Map<String, AttributeValue> lastKey;
    try {
        do {
            // Get results
            result = _awsClient.query(query);
            for (Map<String, AttributeValue> item : result.getItems()) {
                tweetId = item.get("tweet_uid").getS();
                userId = item.get("userid").getS();
                text = item.get("text").getS();
                userName = item.get("username").getS();
                aggregated = DataUtils.parseGrokDate(item.get("agg_ts").getS());
                created = DataUtils.parseGrokDate(item.get("created_at").getS());

                // "retweet_count" is optional
                retweet = item.get("retweet_count");
                if (retweet != null && retweet.getN() != null) {
                    retweetCount = Integer.parseInt(retweet.getN());
                } else {
                    retweetCount = 0;
                }
                if (!callback.onData(dataFactory.createTweet(tweetId, aggregated, created, userId, userName,
                        text, retweetCount))) {
                    // Canceled by the user
                    break;
                }
            }
            // Make sure to get all pages
            lastKey = result.getLastEvaluatedKey();
            query.setExclusiveStartKey(lastKey);
        } while (lastKey != null);
    } catch (AmazonClientException e) {
        // Wraps Amazon's unchecked exception as IOException
        throw new IOException(e);
    }
}

---

From source file:com.raoul.walkfoframe.web.DynamoDBManager.java

License:Open Source License

public static ArrayList<Wofhonorees> getWOFhonorees(Date timestamp) {
    System.out.println("---------    getWOFhonorees called --------   " + HWOFameApplication.clientManager);
    AmazonDynamoDB ddb = null;/*from  ww  w. jav  a 2s.  c o  m*/
    try {
        ddb = HWOFameApplication.clientManager;
        // System.out.println(" AmazonDynamoDB : "+HWOFameApplication.clientManager.ddb());
    } catch (Exception e) {
        System.out.println("--------------  exception generate --------------");
        e.printStackTrace();
    }
    System.out.println("---------    getWOFhonorees called ddb :--------   " + ddb);
    DynamoDBMapper mapper = new DynamoDBMapper(ddb);

    DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
    SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyyMMdd");
    dateFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
    long milis = timestamp.getTime();
    String timestampString = dateFormatter.format(milis);

    scanExpression.addFilterCondition("datelastupdate",
            new Condition().withComparisonOperator(ComparisonOperator.GT.toString())
                    .withAttributeValueList(new AttributeValue().withN(timestampString)));

    try {
        PaginatedScanList<Wofhonorees> result = mapper.scan(Wofhonorees.class, scanExpression);

        ArrayList<Wofhonorees> resultList = new ArrayList<Wofhonorees>();
        for (Wofhonorees up : result) {
            resultList.add(up);
        }
        System.out.println("---------    getWOFhonorees called return --------   " + resultList);
        return resultList;

    } catch (AmazonServiceException ex) {
        System.out.println("---------    getWOFhonorees called Exception generate --------   ");
        //HWOFameApplication.clientManager.wipeCredentialsOnAuthError(ex);
    }
    System.out.println("---------    getWOFhonorees called return --------   " + null);
    return null;
}

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