Package org.elasticsearch.index.shard

Class ShardPath

java.lang.Object

org.elasticsearch.index.shard.ShardPath

public final class ShardPath
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static String	INDEX_FOLDER_NAME
static String	TRANSLOG_FOLDER_NAME

Constructor Summary

Constructors

Constructor	Description
ShardPath(boolean isCustomDataPath, Path dataPath, Path shardStatePath, ShardId shardId)

Method Summary

Modifier and Type	Method	Description
static void	deleteLeftoverShardDirectory(org.apache.logging.log4j.Logger logger, NodeEnvironment env, ShardLock lock, IndexSettings indexSettings)	This method tries to delete left-over shards where the index name has been reused but the UUID is different to allow the new shard to be allocated.
boolean	equals(Object o)
boolean	exists()
Path	getDataPath()
Path	getRootDataPath()	Returns the data-path root for this shard.
Path	getRootStatePath()	Returns the state-path root for this shard.
ShardId	getShardId()
Path	getShardStatePath()
int	hashCode()
boolean	isCustomDataPath()	Returns true iff the data location is a custom data location and therefore outside of the nodes configured data paths.
static ShardPath	loadShardPath(org.apache.logging.log4j.Logger logger, NodeEnvironment env, ShardId shardId, IndexSettings indexSettings)	This method walks through the nodes shard paths to find the data and state path for the given shard.
static ShardPath	loadShardPath(org.apache.logging.log4j.Logger logger, ShardId shardId, IndexSettings indexSettings, Path[] availableShardPaths, int nodeLockId, Path sharedDataPath)	This method walks through the nodes shard paths to find the data and state path for the given shard.
Path	resolveIndex()
Path	resolveTranslog()
static ShardPath	selectNewPathForShard(NodeEnvironment env, ShardId shardId, IndexSettings indexSettings, long avgShardSizeInBytes, Map<Path,Integer> dataPathToShardCount)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

INDEX_FOLDER_NAME

public static final String INDEX_FOLDER_NAME

See Also:

Constant Field Values

TRANSLOG_FOLDER_NAME

public static final String TRANSLOG_FOLDER_NAME

See Also:

Constant Field Values

Constructor Detail

ShardPath

public ShardPath(boolean isCustomDataPath,
                 Path dataPath,
                 Path shardStatePath,
                 ShardId shardId)

Method Detail

resolveTranslog

public Path resolveTranslog()

resolveIndex

public Path resolveIndex()

getDataPath

public Path getDataPath()

exists

public boolean exists()

getShardId

public ShardId getShardId()

getShardStatePath

public Path getShardStatePath()

getRootDataPath

public Path getRootDataPath()

Returns the data-path root for this shard. The root is a parent of getDataPath() without the index name and the shard ID.

getRootStatePath

public Path getRootStatePath()

Returns the state-path root for this shard. The root is a parent of getRootStatePath() ()} without the index name and the shard ID.

isCustomDataPath

public boolean isCustomDataPath()

Returns true iff the data location is a custom data location and therefore outside of the nodes configured data paths.

loadShardPath

public static ShardPath loadShardPath(org.apache.logging.log4j.Logger logger,
                                      NodeEnvironment env,
                                      ShardId shardId,
                                      IndexSettings indexSettings)
                               throws IOException

This method walks through the nodes shard paths to find the data and state path for the given shard. If multiple directories with a valid shard state exist the one with the highest version will be used. Note: this method resolves custom data locations for the shard.

Throws:

IOException

loadShardPath

public static ShardPath loadShardPath(org.apache.logging.log4j.Logger logger,
                                      ShardId shardId,
                                      IndexSettings indexSettings,
                                      Path[] availableShardPaths,
                                      int nodeLockId,
                                      Path sharedDataPath)
                               throws IOException

This method walks through the nodes shard paths to find the data and state path for the given shard. If multiple directories with a valid shard state exist the one with the highest version will be used. Note: this method resolves custom data locations for the shard.

Throws:

IOException

deleteLeftoverShardDirectory

public static void deleteLeftoverShardDirectory(org.apache.logging.log4j.Logger logger,
                                                NodeEnvironment env,
                                                ShardLock lock,
                                                IndexSettings indexSettings)
                                         throws IOException

This method tries to delete left-over shards where the index name has been reused but the UUID is different to allow the new shard to be allocated.

Throws:

IOException

selectNewPathForShard

public static ShardPath selectNewPathForShard(NodeEnvironment env,
                                              ShardId shardId,
                                              IndexSettings indexSettings,
                                              long avgShardSizeInBytes,
                                              Map<Path,Integer> dataPathToShardCount)
                                       throws IOException

Throws:

IOException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object