org.corfudb.runtime.view

Class Address

java.lang.Object

org.corfudb.runtime.view.Address

public class Address
extends Object

Currently, this class holds static constants used to represent addresses. In the future, it may replace the use of long depending on performance.

Created by mwei on 1/6/17.

Field Summary

Fields

Modifier and Type	Field and Description
static long	ABORTED Aborted request constant.
static long	COW_BACKPOINTER Indicates that the previous entry in the stream belongs to another stream.
static long	MAX The maximum address.
static long	NEVER_READ This is a constant use for initializing addresses before 0 is read.
static long	NO_BACKPOINTER Constant to indicate that no backpointer is available for the given stream (due to reset).
static long	NON_ADDRESS
static long	NON_EXIST A non-existing address constant.
static long	NOT_FOUND Not found constant.
static long	OPTIMISTIC Optimistic constant.

Constructor Summary

Constructors

Constructor and Description
Address()

Method Summary

Modifier and Type	Method and Description
static boolean	isAddress(long addr) Returns whether a given address is a valid address or not.
static boolean	isMinAddress(long addr)
static long	maxNonAddress()
static boolean	nonAddress(long addr) Returns whether a given address is a valid address or not.

Methods inherited from class java.lang.Object

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

Field Detail

NON_ADDRESS

public static long NON_ADDRESS

MAX

public static final long MAX

The maximum address.

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Constant Field Values

ABORTED

public static final long ABORTED

Aborted request constant. Used to indicate an attempted read, but was rejected at the request of the client.

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Constant Field Values

NOT_FOUND

public static final long NOT_FOUND

Not found constant. Used to indicate that a search for an entry did not result in a entry.

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Constant Field Values

OPTIMISTIC

public static final long OPTIMISTIC

Optimistic constant. Used to indicate that an update is optimistic.

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Constant Field Values

NO_BACKPOINTER

public static final long NO_BACKPOINTER

Constant to indicate that no backpointer is available for the given stream (due to reset).

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Constant Field Values

NON_EXIST

public static final long NON_EXIST

A non-existing address constant. Indicating that an address was request, but no match exists.

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Constant Field Values

NEVER_READ

public static final long NEVER_READ

This is a constant use for initializing addresses before 0 is read. to be consistent, a initial position already "consumed" is -1L

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Constant Field Values

COW_BACKPOINTER

public static final long COW_BACKPOINTER

Indicates that the previous entry in the stream belongs to another stream.

See Also:

Constant Field Values

Constructor Detail

Address

public Address()

Method Detail

nonAddress

public static boolean nonAddress(long addr)

Returns whether a given address is a valid address or not.

Parameters:

addr - log address

Returns:

true for all flag non-address constants

isAddress

public static boolean isAddress(long addr)

Returns whether a given address is a valid address or not.

Parameters:

addr - log address

Returns:

true is addr is a legitimate address; false for all flag non-address constants

isMinAddress

public static boolean isMinAddress(long addr)

maxNonAddress

public static long maxNonAddress()