Package org.apache.jackrabbit.oak.segment

Class 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 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

    • 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