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

Package com.amazonaws.services.dynamodbv2.model

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

com.amazonaws.services.dynamodbv2.model.ScanResult
Container for the parameters to the {@link com.amazonaws.services.dynamodbv2.AmazonDynamoDB#createTable(CreateTableRequest) CreateTable operation}.
The CreateTable operation adds a new table to your account. In an AWS account, table names must be unique within each region. That is, you can have two tables with same name if you create the tables in different regions.

CreateTable is an asynchronous operation. Upon receiving a CreateTable request, Amazon DynamoDB immediately returns a response with a TableStatus of CREATING . After the table is created, Amazon DynamoDB sets the TableStatus to ACTIVE . You can perform read and write operations only on an ACTIVE table.

If you want to create multiple tables with local secondary indexes on them, you must create them sequentially. Only one table with local secondary indexes can be in the CREATING state at any given time.

You can use the DescribeTable API to check the table status.
@see com.amazonaws.services.dynamodbv2.AmazonDynamoDB#createTable(CreateTableRequest)

            config = new DynamoDBMapperConfig(this.config, config);
        return config;
    }


    private ScanRequest createScanRequestFromExpression(Class<?> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        ScanRequest scanRequest = new ScanRequest();
        scanRequest.setTableName(getTableName(clazz, config));
        scanRequest.setScanFilter(scanExpression.getScanFilter());
        scanRequest.setLimit(scanExpression.getLimit());
        scanRequest.setExclusiveStartKey(scanExpression.getExclusiveStartKey());


        return scanRequest;
    }

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    private List<ScanRequest> createParallelScanRequestsFromExpression(Class<?> clazz, DynamoDBScanExpression scanExpression, int totalSegments, DynamoDBMapperConfig config) {
      if (totalSegments < 1)
      throw new IllegalArgumentException("Parallel scan should have at least one scan segment.");
      List<ScanRequest> parallelScanRequests= new LinkedList<ScanRequest>();
        for (int segment = 0; segment < totalSegments; segment++) {
          ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);
          parallelScanRequests.add(scanRequest.withSegment(segment).withTotalSegments(totalSegments));
        }
        return parallelScanRequests;
    }

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     * @see PaginatedScanList
     */
    public <T> PaginatedScanList<T> scan(Class<T> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);


        ScanResult scanResult = db.scan(applyUserAgent(scanRequest));
        return new PaginatedScanList<T>(this, clazz, db, scanRequest, scanResult);
    }

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     *            default provided at object construction.
     */
    public <T> ScanResultPage<T> scanPage(Class<T> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);


        ScanResult scanResult = db.scan(applyUserAgent(scanRequest));
        ScanResultPage<T> result = new ScanResultPage<T>();
        result.setResults(marshallIntoObjects(clazz, scanResult.getItems()));
        result.setLastEvaluatedKey(scanResult.getLastEvaluatedKey());

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     *         item data.
     */
    public int count(Class<?> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);
        scanRequest.setSelect(Select.COUNT);


        // Count scans can also be truncated for large datasets
        int count = 0;
        ScanResult scanResult = null;
        do {
            scanResult = db.scan(applyUserAgent(scanRequest));
            count += scanResult.getCount();
            scanRequest.setExclusiveStartKey(scanResult.getLastEvaluatedKey());
        } while (scanResult.getLastEvaluatedKey() != null);


        return count;
    }

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            config = new DynamoDBMapperConfig(this.config, config);
        return config;
    }


    private ScanRequest createScanRequestFromExpression(Class<?> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        ScanRequest scanRequest = new ScanRequest();
        scanRequest.setTableName(getTableName(clazz, config));
        scanRequest.setScanFilter(scanExpression.getScanFilter());
        scanRequest.setLimit(scanExpression.getLimit());
        scanRequest.setExclusiveStartKey(scanExpression.getExclusiveStartKey());


        return scanRequest;
    }

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    private List<ScanRequest> createParallelScanRequestsFromExpression(Class<?> clazz, DynamoDBScanExpression scanExpression, int totalSegments, DynamoDBMapperConfig config) {
      if (totalSegments < 1)
      throw new IllegalArgumentException("Parallel scan should have at least one scan segment.");
      List<ScanRequest> parallelScanRequests= new LinkedList<ScanRequest>();
        for (int segment = 0; segment < totalSegments; segment++) {
          ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);
          parallelScanRequests.add(scanRequest.withSegment(segment).withTotalSegments(totalSegments));
        }
        return parallelScanRequests;
    }

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    }
    return scanResults;
  }
  
  private ScanResult scanNextPageOfSegment(int currentSegment, boolean checkLastEvaluatedKey) {
    ScanRequest segmentScanRequest = parallelScanRequests.get(currentSegment);
    if (checkLastEvaluatedKey) {
      ScanResult lastScanResult = segmentScanResults.get(currentSegment);
      segmentScanRequest.setExclusiveStartKey(lastScanResult.getLastEvaluatedKey());
    } else {
      segmentScanRequest.setExclusiveStartKey(null);
    }
    ScanResult scanResult = dynamo.scan(mapper.applyUserAgent(segmentScanRequest));
    
    /**
     * Cache the scan result in segmentScanResults.

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    public <T> PaginatedScanList<T> scan(Class<T> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);


        ScanResult scanResult = db.scan(applyUserAgent(scanRequest));
        return new PaginatedScanList<T>(this, clazz, db, scanRequest, scanResult, config.getPaginationLoadingStrategy());
    }

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    public <T> ScanResultPage<T> scanPage(Class<T> clazz, DynamoDBScanExpression scanExpression, DynamoDBMapperConfig config) {
        config = mergeConfig(config);


        ScanRequest scanRequest = createScanRequestFromExpression(clazz, scanExpression, config);


        ScanResult scanResult = db.scan(applyUserAgent(scanRequest));
        ScanResultPage<T> result = new ScanResultPage<T>();
        result.setResults(marshallIntoObjects(clazz, scanResult.getItems()));
        result.setLastEvaluatedKey(scanResult.getLastEvaluatedKey());


        return result;
    }

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