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

Introduction

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

Prototype

public DescribeTableRequest() 

Source Link

Document

Default constructor for DescribeTableRequest object.

Usage

From source file:DynamoDBUtils.java

License:Open Source License

/**
 * Helper method to get the status of an Amazon DynamoDB table
 *
 * @param client//w w w  . ja v  a 2 s  . c  om
 *        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);
}

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From source file:DynamoDBUtils.java

License:Open Source License

/**
 * Verifies if the table has the expected schema.
 *
 * @param client//from  w ww  .  java2  s  .c  om
 *        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//www  .  ja v a2s .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:AmazonDynamoDBSample_PutThrottled.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();//from   w w w  .ja v a 2 s  .  com

    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:TableCreator.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();// w  w w  . ja  va2  s  .  c o m
    long readCapacity = Long.valueOf(args[0]);
    long writeCapacity = Long.valueOf(args[1]);
    try {
        String tableName = "messages";

        //          DeleteTableRequest deleteTableRequest = new DeleteTableRequest(tableName);
        //          dynamoDB.deleteTable(deleteTableRequest);
        //          
        //          waitForTableToBecomeAvailable(tableName);

        // Create a table with a primary hash key named 'name', which holds a string
        CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(tableName)
                .withKeySchema(new KeySchemaElement().withAttributeName("messageId").withKeyType(KeyType.HASH))
                .withAttributeDefinitions(new AttributeDefinition().withAttributeName("messageId")
                        .withAttributeType(ScalarAttributeType.S))
                .withProvisionedThroughput(new ProvisionedThroughput().withReadCapacityUnits(readCapacity)
                        .withWriteCapacityUnits(writeCapacity));
        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);

    } 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:TableCreator.java

License:Open Source License

private static void waitForTableToBecomeAvailable(String tableName) {
    System.out.println("Waiting for " + tableName + " to become ACTIVE...");

    long startTime = System.currentTimeMillis();
    long endTime = startTime + (10 * 60 * 1000);
    while (System.currentTimeMillis() < endTime) {
        try {/* w  w  w.  j  a  va 2 s .  c  o  m*/
            Thread.sleep(1000 * 20);
        } catch (Exception e) {
        }
        try {
            DescribeTableRequest request = new DescribeTableRequest().withTableName(tableName);
            TableDescription tableDescription = dynamoDB.describeTable(request).getTable();
            String tableStatus = tableDescription.getTableStatus();
            System.out.println("  - current state: " + tableStatus);
            if (tableStatus.equals(TableStatus.ACTIVE.toString()))
                return;
        } catch (AmazonServiceException ase) {
            if (ase.getErrorCode().equalsIgnoreCase("ResourceNotFoundException") == false)
                throw ase;
        }
    }

    throw new RuntimeException("Table " + tableName + " never went active");
}

---

From source file:TableCreator.java

License:Open Source License

private static void waitForTableToDelete(String tableName) {
    System.out.println("Waiting for " + tableName + " to become ACTIVE...");

    long startTime = System.currentTimeMillis();
    long endTime = startTime + (10 * 60 * 1000);
    while (System.currentTimeMillis() < endTime) {
        try {/*from   w  w  w . j  av  a2 s  .  c  om*/
            Thread.sleep(1000 * 20);
        } catch (Exception e) {
        }
        try {
            DescribeTableRequest request = new DescribeTableRequest().withTableName(tableName);
            TableDescription tableDescription = dynamoDB.describeTable(request).getTable();
            String tableStatus = tableDescription.getTableStatus();
            System.out.println("  - current state: " + tableStatus);
            if (tableStatus.equals(TableStatus.ACTIVE.toString()))
                return;
        } catch (AmazonServiceException ase) {
            if (ase.getErrorCode().equalsIgnoreCase("ResourceNotFoundException") == false)
                throw ase;
        }
    }

    throw new RuntimeException("Table " + tableName + " never went active");
}

---

From source file:ProductCategoryPriceIndex.java

License:Open Source License

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

    try {
        String tableName = "product_cat_pi";

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

        // 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("TV", 2, "TV Type one", "TV Type two");
        PutItemRequest putItemRequest = new PutItemRequest(tableName, item);
        PutItemResult putItemResult = dynamoDB.putItem(putItemRequest);
        System.out.println("Result: " + putItemResult);

    } 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:AmazonDynamoDBSample.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();//  w  w  w  .  jav a 2s.  co  m

    try {
        String tableName = "storyTable";

        // 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("storyID").withKeyType(KeyType.HASH))
                    .withAttributeDefinitions(new AttributeDefinition().withAttributeName("storyID")
                            .withAttributeType(ScalarAttributeType.N))
                    .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);
        Timestamp currentTimestamp = new Timestamp(Calendar.getInstance().getTime().getTime());
        System.out.println(currentTimestamp);
        ByteBuffer b = createBody();
        int id1 = 1;
        int id2 = 2;
        double d1 = 0;
        double d2 = 1;
        Timestamp inputTimestamp = currentTimestamp;
        // Add an item
        Map<String, AttributeValue> item = newItem(id1, "JAM", "This is JAM", b, inputTimestamp, inputTimestamp,
                d1, d2);
        System.out.println("here");

        PutItemRequest putItemRequest = new PutItemRequest(tableName, item);
        System.out.println("here2");
        System.out.println(item);
        System.out.println(putItemRequest);
        PutItemResult putItemResult = dynamoDB.putItem(putItemRequest);
        System.out.println("here3");
        System.out.println("Result: " + putItemResult);

        // Add another item
        item = newItem(id2, "JAM2", "This is JAM2", b, inputTimestamp, inputTimestamp, d1, d2);
        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)
        //                .withAttributeValueList(new AttributeValue());
        //            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:RandomQuery1OnDynamoDB.java

License:Open Source License

public static void main(String[] args) throws Exception {
    init();//from   ww w.  j av  a 2s .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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