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

Introduction

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

Prototype

Condition

Source Link

Usage

From source file:AmazonDynamoDBSample_PutThrottled.java

License:Open Source License

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

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From source file:RandomQuery1OnDynamoDB.java

License:Open Source License

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

        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());
    }
}

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From source file:RandomQuery2OnDynamoDB.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();// w  ww. j  ava2 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);
        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());
    }
}

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

License:Open Source License

/**
 * Query Amazon DynamoDB/*from   www.  java  2s .c  om*/
 *
 * @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;
}

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From source file:awslabs.lab22.SolutionCode.java

License:Open Source License

@Override
public QueryResult lookupByHashKey(AmazonDynamoDBClient ddbClient, String tableName, String company) {
    // Construct an AttributeValue object containing the provided company name.
    AttributeValue attributeValue = new AttributeValue().withS(company);
    // Construct a Condition object containing the desired comparison ("EQ") and the attribute value
    // containing the company name.
    Condition condition = new Condition().withComparisonOperator("EQ").withAttributeValueList(attributeValue);

    // Construct a QueryRequest object that performs a consistent read on the specified table for the
    // previously constructed condition.
    QueryRequest queryRequest = new QueryRequest().withTableName(tableName).withConsistentRead(true);
    queryRequest.addKeyConditionsEntry("Company", condition);

    // Submit the query by calling the query method of the ddbClient object and return the result.
    return ddbClient.query(queryRequest);
}

---

From source file:awslabs.lab51.SolutionCode.java

License:Open Source License

@Override
public List<Map<String, AttributeValue>> getImageItems(AmazonDynamoDBClient dynamoDbClient) {
    try {//from   w w w . ja  v a 2s.  co  m
        String tableName = System.getProperty("SESSIONTABLE");
        String keyPrefix = System.getProperty("PARAM3");

        ScanRequest scanRequest = new ScanRequest(tableName).withSelect("ALL_ATTRIBUTES");

        if (!keyPrefix.isEmpty()) {
            Map<String, Condition> scanFilter = new HashMap<String, Condition>();
            scanFilter.put("Key", new Condition().withAttributeValueList(new AttributeValue().withS(keyPrefix))
                    .withComparisonOperator("BEGINS_WITH"));
            scanRequest.withScanFilter(scanFilter);
        }

        return dynamoDbClient.scan(scanRequest).getItems();
    } catch (Exception ex) {
        labController.logMessageToPage("getImageItems Error: " + ex.getMessage() + ":" + ex.getStackTrace());
        return null;
    }
}

---

From source file:awslabs.lab51.SolutionCode.java

License:Open Source License

@Override
public Boolean isImageInDynamo(AmazonDynamoDBClient dynamoDbClient, String tableName, String key) {
    QueryRequest queryRequest = new QueryRequest(tableName).withConsistentRead(true);
    queryRequest.addKeyConditionsEntry("Key",
            new Condition().withComparisonOperator("EQ").withAttributeValueList(new AttributeValue(key)));

    return (dynamoDbClient.query(queryRequest).getCount() > 0);
}

---

From source file:br.com.faccilitacorretor.middleware.dynamo.AmazonDynamoDBSample.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();/*  www  . ja va  2s  .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());
    }
}

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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;//  www. ja v  a  2s.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);
}

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From source file:com.app.dynamoDb.DynamoFacebookUsers.java

License:Open Source License

public boolean isExist(String UserID) {
    ScanRequest scanRequest = new ScanRequest("FacebookUsers");

    Map<String, Condition> scanFilter = new HashMap<String, Condition>();
    scanFilter.put("UserID", new Condition().withAttributeValueList(new AttributeValue(UserID))
            .withComparisonOperator(ComparisonOperator.EQ));

    scanRequest.setScanFilter(scanFilter);
    ScanResult scanResult = dynamoDB.scan(scanRequest);

    for (Map<String, AttributeValue> item : scanResult.getItems()) {
        if (!(item.isEmpty()))
            return true;
    }//from   w  w  w.java 2s  . c om
    return false;
}

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