org.apache.storm.metricstore.rocksdb

Class RocksDbKey

java.lang.Object

org.apache.storm.metricstore.rocksdb.RocksDbKey

All Implemented Interfaces:

Comparable<RocksDbKey>

public class RocksDbKey
extends Object
implements Comparable<RocksDbKey>

Class representing the data used as a Key in RocksDB. Keys can be used either for metadata or metrics.

Keys are 38 bytes in size. The fields for a key are:

< Field Size Offset
Type 1 0 The type maps to the KeyType enum, specifying a metric or various types of metadata Aggregation Level 1 1 The aggregation level for a metric (see AggLevel enum). 0 for metadata. TopologyId 4 2 The metadata string Id representing a topologyId for a metric, or the unique  string Id for a metadata string Timestamp 8 6 The timestamp for a metric, unused for metadata MetricId 4 14 The metadata string Id for the metric name ComponentId 4 18 The metadata string Id for the component Id ExecutorId 4 22 The metadata string Id for the executor Id HostId 4 26 The metadata string Id for the host Id Port 4 30 The port number StreamId 4 34 The metadata string Id for the stream Id 

Method Summary

Modifier and Type	Method and Description
int	compareTo(RocksDbKey o) compares to keys on a byte by byte basis.
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

compareTo

public int compareTo(RocksDbKey o)

compares to keys on a byte by byte basis.

Specified by:

compareTo in interface Comparable<RocksDbKey>

Returns:

comparison of key byte values

toString

public String toString()

Overrides:

toString in class Object