com.orientechnologies.orient.core.storage

Enum OChecksumMode

java.lang.Object

java.lang.Enum<OChecksumMode>

com.orientechnologies.orient.core.storage.OChecksumMode

All Implemented Interfaces:

Serializable, Comparable<OChecksumMode>

public enum OChecksumMode
extends Enum<OChecksumMode>

Defines per-page checksum modes supported by write caches.

Author:

Sergey Sitnikov

Enum Constant Summary

Enum Constants

Enum Constant and Description
Off Checksums are completely off.
Store Checksums are calculated and stored on page flushes, no verification is done on page loads, stored checksums are verified only during user-initiated health checks.
StoreAndSwitchReadOnlyMode Same as StoreAndVerify with addition that storage will be switched in read only mode till it will not be repaired.
StoreAndThrow Same as StoreAndVerify with addition of exceptions thrown on errors.
StoreAndVerify Checksums are calculated and stored on page flushes, verification is performed on each page load, errors are reported in the log.

Method Summary

Modifier and Type	Method and Description
static OChecksumMode	valueOf(String name) Returns the enum constant of this type with the specified name.
static OChecksumMode[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Off

public static final OChecksumMode Off

Checksums are completely off.

Store

public static final OChecksumMode Store

Checksums are calculated and stored on page flushes, no verification is done on page loads, stored checksums are verified only during user-initiated health checks.

StoreAndVerify

public static final OChecksumMode StoreAndVerify

Checksums are calculated and stored on page flushes, verification is performed on each page load, errors are reported in the log.

StoreAndThrow

public static final OChecksumMode StoreAndThrow

Same as StoreAndVerify with addition of exceptions thrown on errors. This mode is useful for debugging and testing, but should be avoided in a production environment.

StoreAndSwitchReadOnlyMode

public static final OChecksumMode StoreAndSwitchReadOnlyMode

Same as StoreAndVerify with addition that storage will be switched in read only mode till it will not be repaired.

Method Detail

values

public static OChecksumMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (OChecksumMode c : OChecksumMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static OChecksumMode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null