org.apache.jackrabbit.oak.segment

Class MapRecord

java.lang.Object

org.apache.jackrabbit.oak.segment.MapRecord

public class MapRecord
extends java.lang.Object

A map. The top level record is either a record of type "BRANCH" or "LEAF" (depending on the data).

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	BITS_PER_LEVEL Number of bits of the hash code to look at on each level of the trie.
protected static int	BUCKETS_PER_LEVEL Number of buckets at each level of the trie.
protected static int	ERROR_SIZE Going over this limit will generate an error message in the log
protected static int	ERROR_SIZE_DISCARD_WRITES Going over this limit will generate an error message in the log and won't allow writes unless oak.segmentNodeStore.allowWritesOnHugeMapRecord system property is set.
protected static int	ERROR_SIZE_HARD_STOP Going over this limit will generate an error message in the log and won't allow any writes whatsoever.
protected static int	LEVEL_BITS Number of bits needed to indicate the current trie level.
protected static int	MAX_NUMBER_OF_LEVELS Maximum number of trie levels.
protected static int	MAX_SIZE Maximum size of a map.
protected static int	SIZE_BITS Number of bits used to indicate the size of a map.
protected static int	WARN_SIZE Going over this limit will generate a warning message in the log

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object that)
@NotNull GCGeneration	getGcGeneration() Get the underlying segment's gc generation.
RecordId	getRecordId() Returns the identifier of this record.
protected int	getRecordNumber()
protected Segment	getSegment() Returns the segment that contains this record.
int	hashCode()
boolean	isDiff()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

BITS_PER_LEVEL

protected static final int BITS_PER_LEVEL

Number of bits of the hash code to look at on each level of the trie.

See Also:

Constant Field Values

BUCKETS_PER_LEVEL

protected static final int BUCKETS_PER_LEVEL

Number of buckets at each level of the trie.

See Also:

Constant Field Values

MAX_NUMBER_OF_LEVELS

protected static final int MAX_NUMBER_OF_LEVELS

Maximum number of trie levels.

See Also:

Constant Field Values

LEVEL_BITS

protected static final int LEVEL_BITS

Number of bits needed to indicate the current trie level. Currently 4.

SIZE_BITS

protected static final int SIZE_BITS

Number of bits used to indicate the size of a map. Currently 28.

MAX_SIZE

protected static final int MAX_SIZE

Maximum size of a map.

WARN_SIZE

protected static final int WARN_SIZE

Going over this limit will generate a warning message in the log

See Also:

Constant Field Values

ERROR_SIZE

protected static final int ERROR_SIZE

Going over this limit will generate an error message in the log

See Also:

Constant Field Values

ERROR_SIZE_DISCARD_WRITES

protected static final int ERROR_SIZE_DISCARD_WRITES

Going over this limit will generate an error message in the log and won't allow writes unless oak.segmentNodeStore.allowWritesOnHugeMapRecord system property is set.

See Also:

Constant Field Values

ERROR_SIZE_HARD_STOP

protected static final int ERROR_SIZE_HARD_STOP

Going over this limit will generate an error message in the log and won't allow any writes whatsoever. Moreover UnsupportedOperationException will be thrown.

See Also:

Constant Field Values

Method Detail

isDiff

public boolean isDiff()

toString

public java.lang.String toString()

getSegment

protected Segment getSegment()

Returns the segment that contains this record.

Returns:

segment that contains this record

getRecordNumber

protected int getRecordNumber()

getRecordId

public RecordId getRecordId()

Returns the identifier of this record.

Returns:

record identifier

getGcGeneration

@NotNull
public @NotNull GCGeneration getGcGeneration()

Get the underlying segment's gc generation. Might cause the segment to get loaded if the generation info is missing

Returns:

the segment's gc generation

equals

public boolean equals(java.lang.Object that)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object