org.apache.gora.dynamodb.store

Class DynamoDBUtils

java.lang.Object

org.apache.gora.dynamodb.store.DynamoDBUtils

public class DynamoDBUtils
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DynamoDBUtils.DynamoDBType

Field Summary

Fields

Modifier and Type	Field and Description
static String	ASYNC_CLIENT_PROP
static String	AVRO_SERIALIZATION
static String	AWS_CREDENTIALS_PROPERTIES AWS Credential file name.
static String	CLI_TYP_PROP Parameter to decide what type of Amazon DynamoDB client to use
static String	CONSISTENCY_READS Parameter to decide how reads will be made i.e.
static String	CONSISTENCY_READS_TRUE
static String	DYNAMO_KEY_HASHR
static String	DYNAMO_KEY_HASHRANGE
static String	DYNAMO_SERIALIZATION
static String	ENDPOINT_PROP Parameter to decide where the data store will make its computations
static org.slf4j.Logger	LOG
static String	MAPPING_FILE The mapping file to create the tables from.
static String	PREF_SCH_NAME Parameter to decide which schema will be used
static String	SERIALIZATION_TYPE Parameter to decide how serialization will be made i.e.
static long	SLEEP_DELETE_TIME
static long	SLEEP_TIME
static String	SYNC_CLIENT_PROP DynamoDB client types.
static long	WAIT_TIME Default times to wait while requests are performed.
static String	WS_PROVIDER Name of the cloud database provider.

Constructor Summary

Constructors

Constructor and Description
DynamoDBUtils()

Method Summary

Modifier and Type	Method and Description
static com.amazonaws.services.dynamodbv2.model.CreateTableRequest	buildCreateTableRequest(String tableName, ArrayList<com.amazonaws.services.dynamodbv2.model.KeySchemaElement> keySchema, com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput proThrou, Map<String,String> attrs) Builds the necessary requests to create tables
static void	executeCreateTableRequest(com.amazonaws.services.dynamodbv2.AmazonDynamoDB awsClient, String tableName, ArrayList<com.amazonaws.services.dynamodbv2.model.KeySchemaElement> keySchema, Map<String,String> attrs, com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput proThrou) Executes a create table request using the DynamoDB client and waits the default time until it's been created.
static com.amazonaws.services.dynamodbv2.AmazonDynamoDB	getClient(String clientType, com.amazonaws.auth.AWSCredentials credentials) Method to create the specific client to be used
static com.amazonaws.auth.PropertiesCredentials	getCredentials(Class<?> clazz) Creates the AWSCredentials object based on the properties file.
static void	waitForTableToBecomeAvailable(com.amazonaws.services.dynamodbv2.AmazonDynamoDB awsClient, String tableName) Waits up to 6 minutes to confirm if a table has been created or not

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DYNAMO_KEY_HASHRANGE

public static final String DYNAMO_KEY_HASHRANGE

See Also:

Constant Field Values

DYNAMO_KEY_HASHR

public static final String DYNAMO_KEY_HASHR

See Also:

Constant Field Values

AWS_CREDENTIALS_PROPERTIES

public static final String AWS_CREDENTIALS_PROPERTIES

AWS Credential file name.

See Also:

Constant Field Values

WS_PROVIDER

public static final String WS_PROVIDER

Name of the cloud database provider.

See Also:

Constant Field Values

CLI_TYP_PROP

public static final String CLI_TYP_PROP

Parameter to decide what type of Amazon DynamoDB client to use

See Also:

Constant Field Values

ENDPOINT_PROP

public static final String ENDPOINT_PROP

Parameter to decide where the data store will make its computations

See Also:

Constant Field Values

PREF_SCH_NAME

public static final String PREF_SCH_NAME

Parameter to decide which schema will be used

See Also:

Constant Field Values

CONSISTENCY_READS

public static final String CONSISTENCY_READS

Parameter to decide how reads will be made i.e. using strong consistency or eventual consistency.

See Also:

Constant Field Values

CONSISTENCY_READS_TRUE

public static final String CONSISTENCY_READS_TRUE

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Constant Field Values

SERIALIZATION_TYPE

public static final String SERIALIZATION_TYPE

Parameter to decide how serialization will be made i.e. using Dynamodb's or Avro serialization.

See Also:

Constant Field Values

DYNAMO_SERIALIZATION

public static final String DYNAMO_SERIALIZATION

See Also:

Constant Field Values

AVRO_SERIALIZATION

public static final String AVRO_SERIALIZATION

See Also:

Constant Field Values

SYNC_CLIENT_PROP

public static final String SYNC_CLIENT_PROP

DynamoDB client types.

See Also:

Constant Field Values

ASYNC_CLIENT_PROP

public static final String ASYNC_CLIENT_PROP

See Also:

Constant Field Values

MAPPING_FILE

public static final String MAPPING_FILE

The mapping file to create the tables from.

See Also:

Constant Field Values

WAIT_TIME

public static long WAIT_TIME

Default times to wait while requests are performed.

SLEEP_TIME

public static long SLEEP_TIME

SLEEP_DELETE_TIME

public static long SLEEP_DELETE_TIME

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

DynamoDBUtils

public DynamoDBUtils()

Method Detail

getClient

public static com.amazonaws.services.dynamodbv2.AmazonDynamoDB getClient(String clientType,
                                                                         com.amazonaws.auth.AWSCredentials credentials)

Method to create the specific client to be used

Parameters:

clientType -

credentials -

Returns:

getCredentials

public static com.amazonaws.auth.PropertiesCredentials getCredentials(Class<?> clazz)

Creates the AWSCredentials object based on the properties file.

Parameters:

clazz -

Returns:

executeCreateTableRequest

public static void executeCreateTableRequest(com.amazonaws.services.dynamodbv2.AmazonDynamoDB awsClient,
                                             String tableName,
                                             ArrayList<com.amazonaws.services.dynamodbv2.model.KeySchemaElement> keySchema,
                                             Map<String,String> attrs,
                                             com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput proThrou)

Executes a create table request using the DynamoDB client and waits the default time until it's been created.

Parameters:

awsClient -

keySchema -

tableName -

proThrou -

buildCreateTableRequest

public static com.amazonaws.services.dynamodbv2.model.CreateTableRequest buildCreateTableRequest(String tableName,
                                                                                                 ArrayList<com.amazonaws.services.dynamodbv2.model.KeySchemaElement> keySchema,
                                                                                                 com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput proThrou,
                                                                                                 Map<String,String> attrs)

Builds the necessary requests to create tables

Parameters:

tableName -

keySchema -

proThrou -

attrs -

Returns:

waitForTableToBecomeAvailable

public static void waitForTableToBecomeAvailable(com.amazonaws.services.dynamodbv2.AmazonDynamoDB awsClient,
                                                 String tableName)

Waits up to 6 minutes to confirm if a table has been created or not

Parameters:

awsClient -

tableName -