com.amazon.titan.diskstorage.dynamodb

Class ExponentialBackoff<RequestType,ResultType>

java.lang.Object

com.amazon.titan.diskstorage.dynamodb.ExponentialBackoff<RequestType,ResultType>

Type Parameters:

RequestType - the type of AWS request that is input

ResultType - the type of AWS request that is returned

Direct Known Subclasses:

ExponentialBackoff.DeleteItem, ExponentialBackoff.GetItem, ExponentialBackoff.Query, ExponentialBackoff.Scan, ExponentialBackoff.UpdateItem

public abstract class ExponentialBackoff<RequestType,ResultType>
extends java.lang.Object

A wrapper for a client-side exponential backoff retry strategy for DynamoDB API calls

Author:

Alexander Patrikalakis

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExponentialBackoff.DeleteItem
static class	ExponentialBackoff.GetItem
static class	ExponentialBackoff.Query
static class	ExponentialBackoff.Scan
static class	ExponentialBackoff.UpdateItem

Field Summary

Fields

Modifier and Type	Field and Description
protected DynamoDBDelegate	delegate
static java.lang.String	DELETE_ITEM_RETRIES
static java.lang.String	GET_ITEM_RETRIES
static java.lang.String	QUERY_RETRIES
protected RequestType	request
protected ResultType	result
static java.lang.String	RETRIES
static java.lang.String	SCAN_RETRIES
static java.lang.String	UPDATE_ITEM_RETRIES

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ExponentialBackoff(RequestType requestType, DynamoDBDelegate delegate, java.lang.String apiNameTries)

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract ResultType	call()
protected abstract java.lang.String	getTableName()
ResultType	runWithBackoff()

Methods inherited from class java.lang.Object

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

Field Detail

RETRIES

public static final java.lang.String RETRIES

See Also:

Constant Field Values

SCAN_RETRIES

public static final java.lang.String SCAN_RETRIES

See Also:

Constant Field Values

QUERY_RETRIES

public static final java.lang.String QUERY_RETRIES

See Also:

Constant Field Values

UPDATE_ITEM_RETRIES

public static final java.lang.String UPDATE_ITEM_RETRIES

See Also:

Constant Field Values

DELETE_ITEM_RETRIES

public static final java.lang.String DELETE_ITEM_RETRIES

See Also:

Constant Field Values

GET_ITEM_RETRIES

public static final java.lang.String GET_ITEM_RETRIES

See Also:

Constant Field Values

request

protected final RequestType request

result

protected ResultType result

delegate

protected final DynamoDBDelegate delegate

Constructor Detail

ExponentialBackoff

protected ExponentialBackoff(RequestType requestType,
                  DynamoDBDelegate delegate,
                  java.lang.String apiNameTries)

Method Detail

call

protected abstract ResultType call()
                            throws com.thinkaurelius.titan.diskstorage.BackendException

Throws:

com.thinkaurelius.titan.diskstorage.BackendException

getTableName

protected abstract java.lang.String getTableName()

runWithBackoff

public ResultType runWithBackoff()
                          throws com.thinkaurelius.titan.diskstorage.BackendException

Throws:

com.thinkaurelius.titan.diskstorage.BackendException