Example usage for com.amazonaws.services.dynamodbv2.datamodeling DynamoDBScanExpression DynamoDBScanExpression

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.datamodeling DynamoDBScanExpression DynamoDBScanExpression.

Prototype

DynamoDBScanExpression

Source Link

Usage

From source file:cf.funge.aworldofplants.model.plant.DDBPlantDAO.java

License:Open Source License

/**
 * Returns a list of plants in the DynamoDB table.
 *
 * @param limit The maximum numbers of results for the scan
 * @return A List of Plant objects//w ww  .j a  v a  2s.  c o  m
 */
public List<Plant> getPlants(int limit) {
    if (limit <= 0 || limit > DynamoDBConfiguration.SCAN_LIMIT)
        limit = DynamoDBConfiguration.SCAN_LIMIT;

    DynamoDBScanExpression expression = new DynamoDBScanExpression();
    expression.setLimit(limit);
    return getMapper().scan(Plant.class, expression);
}

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From source file:cf.funge.aworldofplants.model.plant.DDBPlantDAO.java

License:Open Source License

public List<Plant> getUserPlants(int limit, String username) {
    if (limit <= 0 || limit > DynamoDBConfiguration.SCAN_LIMIT)
        limit = DynamoDBConfiguration.SCAN_LIMIT;

    Map<String, AttributeValue> eav = new HashMap<>();
    eav.put(":val1", new AttributeValue().withS(username));

    DynamoDBScanExpression expression = new DynamoDBScanExpression().withFilterExpression("username = :val1")
            .withExpressionAttributeValues(eav);
    expression.setLimit(limit);/*from www  .  ja va2  s  .  co m*/

    List<Plant> scanResult = getMapper().scan(Plant.class, expression);

    return scanResult;
}

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From source file:cf.funge.aworldofplants.model.plant.DDBPlantDAO.java

License:Open Source License

public GetPlantHistoryResponse getPlantHistory(String plantId, String startDate, String endDate,
        String chartType) {//ww  w.j ava  2 s  . c  o  m
    System.out.println("Find Plant history less than certain date: Scan history.");

    Map<String, AttributeValue> eav = new HashMap<String, AttributeValue>();
    eav.put(":val1", new AttributeValue().withS(plantId));
    eav.put(":val2", new AttributeValue().withN(startDate));
    eav.put(":val3", new AttributeValue().withN(endDate));
    eav.put(":val4", new AttributeValue().withS(chartType));

    DynamoDBScanExpression scanExpression = new DynamoDBScanExpression()
            .withFilterExpression(
                    "plantId = :val1 and startTime >= :val2 and endTime <= :val3 and chartType = :val4")
            .withExpressionAttributeValues(eav);

    List<PlantHistory> scanResult = getMapper().scan(PlantHistory.class, scanExpression);

    int scanResultSize = scanResult.size();

    GetPlantHistoryResponse newPlantHistory = new GetPlantHistoryResponse();
    String[] startTimes = new String[scanResultSize];
    String[] endTimes = new String[scanResultSize];
    String[] averages = new String[scanResultSize];
    String[] mins = new String[scanResultSize];
    String[] maxes = new String[scanResultSize];

    int i = 0;

    for (PlantHistory plantHistory : scanResult) {
        startTimes[i] = Objects.toString(plantHistory.getStartTime(), null);
        endTimes[i] = Objects.toString(plantHistory.getEndTime(), null);
        averages[i] = Objects.toString(plantHistory.getAvg(), null);
        mins[i] = Objects.toString(plantHistory.getMin(), null);
        maxes[i] = Objects.toString(plantHistory.getMax(), null);
        ++i;
    }

    newPlantHistory.setStartTimes(startTimes);
    newPlantHistory.setEndTimes(endTimes);
    newPlantHistory.setAverages(averages);
    newPlantHistory.setMins(mins);
    newPlantHistory.setMaxes(maxes);

    return newPlantHistory;
}

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From source file:cf.funge.aworldofplants.model.user.DDBUserDAO.java

License:Open Source License

/**
 * Queries DynamoDB to find a user by its Email
 *
 * @param email The email to search for//from   w  w  w. j av a2  s  .c o m
 * @return A populated User object, null if the user was not found
 * @throws DAOException
 */
public boolean getUserByEmail(String email) throws DAOException {
    if (email == null || email.trim().equals("")) {
        throw new DAOException("Cannot lookup null or empty user");
    }

    //return getMapper().load(User.class, email);

    Map<String, AttributeValue> eav = new HashMap<String, AttributeValue>();
    eav.put(":val1", new AttributeValue().withS(email));

    System.out.println("Trying to query with email");

    DynamoDBScanExpression scanExpression = new DynamoDBScanExpression().withFilterExpression("email = :val1")
            .withExpressionAttributeValues(eav);

    List<User> scanResult = getMapper().scan(User.class, scanExpression);

    if (scanResult.isEmpty()) {
        return false;
    }

    return true;
}

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From source file:chatbot.ServiceAlertHandler.java

License:Open Source License

private void FindCasesActive(DynamoDBMapper mapper, String sTeamID) throws Exception {
    System.out.println("Finding Active Cases ...");
    Map<String, AttributeValue> eav = new HashMap<String, AttributeValue>();
    eav.put(":val1", new AttributeValue().withS("ACTIVE"));
    eav.put(":val2", new AttributeValue().withS(sTeamID));
    DynamoDBScanExpression scanExpression = new DynamoDBScanExpression()
            .withFilterExpression("CASE_STATE = :val1 and TEAM_ID = :val2").withExpressionAttributeValues(eav);
    List<Case> scanResult = mapper.scan(Case.class, scanExpression);
    for (Case objCase : scanResult) {
        System.out.println(objCase);
        System.out.println("ID " + objCase.getId());
        objIDList.put(objCase.getId(), "");
        objCase.setStatus("INACTIVE");
        mapper.save(objCase);/*from  w  w  w.  ja va  2s . c  om*/
    }
}

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From source file:com.github.sporcina.mule.modules.DynamoDBConnector.java

License:Open Source License

/**
 * Processor to delete a document/*from  w w w  .j a  va  2 s.co m*/
 * <p/>
 * {@sample.xml ../../../doc/DynamoDB-connector.xml.sample dynamodb:get-all-documents}
 *
 * @param tableName
 *         the name of the table to get the document from
 * @param template
 *         an object with the document data that DynamoDB will match against
 *
 * @return Object a list of all the documents
 */
@Processor
public Object getAllDocuments(String tableName, @Optional @Default(PAYLOAD) final Object template) {

    Class templateClass = template.getClass();

    DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
    DynamoDBMapper mapper = getDbObjectMapper(tableName);
    return mapper.scan(templateClass, scanExpression);
}

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From source file:com.makariev.dynamodb.forum.service.BaseDynamoDBRepository.java

License:Apache License

public List<T> findAll() {
    final DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
    //not quite correct; this thing is limmitted by dynamoDb ( there is no count ) 
    final PaginatedScanList<T> result = mapper.scan(clazz, scanExpression);
    return result;
}

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From source file:com.makariev.dynamodb.forum.service.BicycleQueryScanService.java

License:Apache License

public List<Bicycle> findBicyclesOfSpecificTypeWithMultipleThreads(
        @DsLabel("number of parallel threads") int numberOfThreads, @DsLabel("bicycleType") String bicycleType)
        throws Exception {

    final List<Bicycle> result = new ArrayList<>();

    final DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
    scanExpression.addFilterCondition("ProductCategory",
            new Condition().withComparisonOperator(ComparisonOperator.EQ)
                    .withAttributeValueList(new AttributeValue().withS("Bicycle")));
    scanExpression.addFilterCondition("BicycleType",
            new Condition().withComparisonOperator(ComparisonOperator.EQ)
                    .withAttributeValueList(new AttributeValue().withS(bicycleType)));
    final List<Bicycle> scanResult = mapper.parallelScan(Bicycle.class, scanExpression, numberOfThreads);

    for (Bicycle bicycle : scanResult) {
        result.add(bicycle);/*  w  ww.ja va2 s .  co  m*/
    }
    return result;
}

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From source file:com.makariev.dynamodb.preferences.UserPreferenceLowLevelAPIService.java

License:Open Source License

@Override
public List<UserPreference> scanByFirstName(String searchForName) {
    final DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
    scanExpression.addFilterCondition("firstName",
            new Condition().withComparisonOperator(ComparisonOperator.CONTAINS)
                    .withAttributeValueList(new AttributeValue().withS(searchForName)));
    final Map<String, Condition> scanFilter = scanExpression.getScanFilter();

    final ScanResult scanResult = dynamoDb.scan(UserPreference.TABLE_NAME, scanFilter);

    final List<Map<String, AttributeValue>> items = scanResult.getItems();

    return toUserPreferenceList(items);
}

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From source file:com.makariev.dynamodb.preferences.UserPreferenceLowLevelAPIService.java

License:Open Source License

@Override
public List<UserPreference> scanByLastName(String searchForName) {
    final DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
    scanExpression.addFilterCondition("lastName",
            new Condition().withComparisonOperator(ComparisonOperator.CONTAINS)
                    .withAttributeValueList(new AttributeValue().withS(searchForName)));
    final Map<String, Condition> scanFilter = scanExpression.getScanFilter();

    final ScanResult scanResult = dynamoDb.scan(UserPreference.TABLE_NAME, scanFilter);

    final List<Map<String, AttributeValue>> items = scanResult.getItems();

    return toUserPreferenceList(items);
}

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