Example usage for com.amazonaws.services.dynamodbv2 AmazonDynamoDBClient describeTable

List of usage examples for com.amazonaws.services.dynamodbv2 AmazonDynamoDBClient describeTable

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Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2 AmazonDynamoDBClient describeTable.

Prototype

@Override
    public DescribeTableResult describeTable(String tableName)

Source Link

Usage

From source file:DynamoDBUtils.java

License:Open Source License

/**
 * Helper method to get the status of an Amazon DynamoDB table
 *
 * @param client//from  www. j a va 2  s  .  co m
 *        The {@link AmazonDynamoDBClient} with Amazon DynamoDB read privileges
 * @param tableName
 *        The Amazon DynamoDB table to get the status of
 * @return
 */
private static TableStatus getTableStatus(AmazonDynamoDBClient client, String tableName) {
    DescribeTableRequest describeTableRequest = new DescribeTableRequest();
    describeTableRequest.setTableName(tableName);
    DescribeTableResult describeTableResult = client.describeTable(describeTableRequest);
    String status = describeTableResult.getTable().getTableStatus();
    return TableStatus.fromValue(status);
}

From source file:DynamoDBUtils.java

License:Open Source License

/**
 * Verifies if the table has the expected schema.
 *
 * @param client/* w w  w .j a v a2 s  . co m*/
 *        The {@link AmazonDynamoDBClient} with Amazon DynamoDB read privileges
 * @param tableName
 *        The Amazon DynamoDB table to check
 * @param key
 *        The expected hashkey for the Amazon DynamoDB table
 * @return true if the Amazon DynamoDB table exists and the expected hashkey matches the table schema,
 *         otherwise return false
 */
private static boolean tableHasCorrectSchema(AmazonDynamoDBClient client, String tableName, String key) {
    DescribeTableRequest describeTableRequest = new DescribeTableRequest();
    describeTableRequest.setTableName(tableName);
    DescribeTableResult describeTableResult = client.describeTable(describeTableRequest);
    TableDescription tableDescription = describeTableResult.getTable();
    if (tableDescription.getAttributeDefinitions().size() != 1) {
        LOG.error("The number of attribute definitions does not match the existing table.");
        return false;
    }
    AttributeDefinition attributeDefinition = tableDescription.getAttributeDefinitions().get(0);
    if (!attributeDefinition.getAttributeName().equals(key)
            || !attributeDefinition.getAttributeType().equals(ScalarAttributeType.S.toString())) {
        LOG.error("Attribute name or type does not match existing table.");
        return false;
    }
    List<KeySchemaElement> KSEs = tableDescription.getKeySchema();
    if (KSEs.size() != 1) {
        LOG.error("The number of key schema elements does not match the existing table.");
        return false;
    }
    KeySchemaElement kse = KSEs.get(0);
    if (!kse.getAttributeName().equals(key) || !kse.getKeyType().equals(KeyType.HASH.toString())) {
        LOG.error("The hash key does not match the existing table.");
        return false;
    }
    return true;

}

From source file:DynamoDBUtils.java

License:Open Source License

/**
 * Helper method to determine if an Amazon DynamoDB table exists.
 *
 * @param client// w  w w.j  a  va  2 s .c om
 *        The {@link AmazonDynamoDBClient} with Amazon DynamoDB read privileges
 * @param tableName
 *        The Amazon DynamoDB table to check for
 * @return true if the Amazon DynamoDB table exists, otherwise return false
 */
private static boolean tableExists(AmazonDynamoDBClient client, String tableName) {
    DescribeTableRequest describeTableRequest = new DescribeTableRequest();
    describeTableRequest.setTableName(tableName);
    try {
        client.describeTable(describeTableRequest);
        return true;
    } catch (ResourceNotFoundException e) {
        return false;
    }
}

From source file:aws.example.dynamodb.DescribeTable.java

License:Open Source License

public static void main(String[] args) {
    final String USAGE = "\n" + "Usage:\n" + "    DescribeTable <table>\n\n" + "Where:\n"
            + "    table - the table to get information about.\n\n" + "Example:\n"
            + "    DescribeTable HelloTable\n";

    if (args.length < 1) {
        System.out.println(USAGE);
        System.exit(1);//from ww  w.  j  a va2 s  . com
    }

    String table_name = args[0];
    System.out.format("Getting description for %s\n\n", table_name);

    final AmazonDynamoDBClient ddb = new AmazonDynamoDBClient();

    try {
        TableDescription table_info = ddb.describeTable(table_name).getTable();

        if (table_info != null) {
            System.out.format("Table name  : %s\n", table_info.getTableName());
            System.out.format("Table ARN   : %s\n", table_info.getTableArn());
            System.out.format("Status      : %s\n", table_info.getTableStatus());
            System.out.format("Item count  : %d\n", table_info.getItemCount().longValue());
            System.out.format("Size (bytes): %d\n", table_info.getTableSizeBytes().longValue());

            ProvisionedThroughputDescription throughput_info = table_info.getProvisionedThroughput();
            System.out.println("Throughput");
            System.out.format("  Read Capacity : %d\n", throughput_info.getReadCapacityUnits().longValue());
            System.out.format("  Write Capacity: %d\n", throughput_info.getWriteCapacityUnits().longValue());

            List<AttributeDefinition> attributes = table_info.getAttributeDefinitions();
            System.out.println("Attributes");
            for (AttributeDefinition a : attributes) {
                System.out.format("  %s (%s)\n", a.getAttributeName(), a.getAttributeType());
            }
        }
    } catch (AmazonServiceException e) {
        System.err.println(e.getErrorMessage());
        System.exit(1);
    }
    System.out.println("\nDone!");
}

From source file:awslabs.lab22.SolutionCode.java

License:Open Source License

@Override
public TableDescription getTableDescription(AmazonDynamoDBClient ddbClient, String tableName) {
    try {/*from  ww w .j  ava2s .c  o  m*/
        DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(tableName);

        DescribeTableResult describeTableResult = ddbClient.describeTable(describeTableRequest);

        return describeTableResult.getTable();
    } catch (AmazonServiceException ase) {
        // If the table isn't found, there's no problem.
        // If the error is something else, re-throw the exception to bubble it up to the caller.
        if (!ase.getErrorCode().equals("ResourceNotFoundException")) {
            throw ase;
        }
        return null;
    }
}

From source file:com.acer.batterycapacitydemo.DynamoDBManager.java

License:Open Source License

public static String getTestTableStatus() {

    try {/*from   w  ww  .  j  a v  a  2 s .  c o  m*/
        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();

        DescribeTableRequest request = new DescribeTableRequest()
                .withTableName(CognitoSyncClientManager.TEST_TABLE_NAME);
        DescribeTableResult result = ddb.describeTable(request);

        String status = result.getTable().getTableStatus();
        return status == null ? "" : status;

    } catch (ResourceNotFoundException e) {
    } catch (AmazonServiceException ex) {
        MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
    }

    return "";
}

From source file:com.amazon.services.awsrum.utils.DynamoDBUtils.java

License:Open Source License

private static boolean tableHasCorrectSchema(AmazonDynamoDBClient client, String tableName, String key,
        String rangeKey) {/*from  ww  w.jav  a 2  s.  c o m*/
    DescribeTableRequest describeTableRequest = new DescribeTableRequest();
    describeTableRequest.setTableName(tableName);
    DescribeTableResult describeTableResult = client.describeTable(describeTableRequest);
    TableDescription tableDescription = describeTableResult.getTable();
    if (tableDescription.getAttributeDefinitions().size() != 2) {
        LOG.error("The number of attribute definitions does not match the existing table.");
        return false;
    }
    AttributeDefinition attributeDefinition = tableDescription.getAttributeDefinitions().get(0);
    if (!attributeDefinition.getAttributeName().equals(key)
            || !attributeDefinition.getAttributeType().equals(ScalarAttributeType.S.toString())) {
        if (!attributeDefinition.getAttributeName().equals(rangeKey)
                || !attributeDefinition.getAttributeType().equals(ScalarAttributeType.N.toString())) {
            LOG.error("Attribute name or type does not match existing table.");
            return false;
        }
    }
    if (!attributeDefinition.getAttributeName().equals(rangeKey)
            || !attributeDefinition.getAttributeType().equals(ScalarAttributeType.N.toString())) {
        if (!attributeDefinition.getAttributeName().equals(key)
                || !attributeDefinition.getAttributeType().equals(ScalarAttributeType.S.toString())) {
            LOG.error("Attribute name or type does not match existing table.");
            return false;
        }
    }

    List<KeySchemaElement> KSEs = tableDescription.getKeySchema();
    if (KSEs.size() != 2) {
        LOG.error("The number of key schema elements does not match the existing table.");
        return false;
    }
    KeySchemaElement kse = KSEs.get(0);
    if (!kse.getAttributeName().equals(key) || !kse.getKeyType().equals(KeyType.HASH.toString())) {
        LOG.error("The hash key does not match the existing table.");
        return false;
    }
    KeySchemaElement seconndKse = KSEs.get(1);
    if (!seconndKse.getAttributeName().equals(rangeKey)
            || !seconndKse.getKeyType().equals(KeyType.RANGE.toString())) {
        LOG.error("The hash range key does not match the existing table.");
        return false;
    }
    return true;

}

From source file:com.example.kwang27.secmap.DynamoDBManager.java

License:Open Source License

public static String getTestTableStatus() {

    try {//from  ww w .  jav a2s  . c  o  m
        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();

        DescribeTableRequest request = new DescribeTableRequest().withTableName(Constants.TEST_TABLE_NAME);
        DescribeTableResult result = ddb.describeTable(request);

        String status = result.getTable().getTableStatus();
        return status == null ? "" : status;

    } catch (ResourceNotFoundException e) {
    } catch (AmazonServiceException ex) {
        MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
    }

    return "";
}

From source file:com.trk.aboutme.DynamoDB.DynamoDBManagerBooks.java

License:Open Source License

public static String getTestTableStatus(String tablename) {

    try {//ww  w.j a v a2  s  . c o m
        AmazonDynamoDBClient ddb = Shelf.clientManager.ddb();

        DescribeTableRequest request = new DescribeTableRequest().withTableName(tablename);
        DescribeTableResult result = ddb.describeTable(request);

        String status = result.getTable().getTableStatus();
        return status == null ? "" : status;

    } catch (ResourceNotFoundException e) {
    } catch (AmazonServiceException ex) {
        Shelf.clientManager.wipeCredentialsOnAuthError(ex);
    }

    return "";
}

From source file:com.trk.aboutme.DynamoDB.DynamoDBManagerUsers.java

License:Open Source License

public static String getTestTableStatus() {

    try {/*from w w  w  .ja  v a2 s.c o m*/
        AmazonDynamoDBClient ddb = Shelf.clientManager.ddb();

        DescribeTableRequest request = new DescribeTableRequest().withTableName(Constants.TEST_TABLE_NAME);
        DescribeTableResult result = ddb.describeTable(request);

        String status = result.getTable().getTableStatus();
        return status == null ? "" : status;

    } catch (ResourceNotFoundException e) {
    } catch (AmazonServiceException ex) {
        Shelf.clientManager.wipeCredentialsOnAuthError(ex);
    }

    return "";
}