org.apache.druid.indexing.overlord

Class ObjectMetadata

java.lang.Object

org.apache.druid.indexing.overlord.ObjectMetadata

All Implemented Interfaces:

DataSourceMetadata

public final class ObjectMetadata
extends Object
implements DataSourceMetadata

Constructor Summary

Constructors

Constructor and Description
ObjectMetadata(Object theObject)

Method Summary

Modifier and Type	Method and Description
DataSourceMetadata	asStartMetadata() As in IndexerMetadataStorageCoordinator.announceHistoricalSegments(java.util.Set<org.apache.druid.timeline.DataSegment>), this class can represent start and end of a sequence.
boolean	equals(Object o)
Object	getObject()
int	hashCode()
boolean	isValidStart() Returns true if this instance should be considered a valid starting point for a new dataSource that has no existing metadata.
boolean	matches(DataSourceMetadata other) Returns true if any information present in this instance matches analogous information from "other" and so they are conflict-free.
DataSourceMetadata	minus(DataSourceMetadata other) Returns a copy of this instance with "other" subtracted.
DataSourceMetadata	plus(DataSourceMetadata other) Returns a copy of this instance with "other" merged in.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectMetadata

public ObjectMetadata(Object theObject)

Method Detail

getObject

public Object getObject()

isValidStart

public boolean isValidStart()

Description copied from interface: DataSourceMetadata

Returns true if this instance should be considered a valid starting point for a new dataSource that has no existing metadata.

Specified by:

isValidStart in interface DataSourceMetadata

asStartMetadata

public DataSourceMetadata asStartMetadata()

Description copied from interface: DataSourceMetadata

As in IndexerMetadataStorageCoordinator.announceHistoricalSegments(java.util.Set<org.apache.druid.timeline.DataSegment>), this class can represent start and end of a sequence. This method converts itself into the one for start of a sequence. Most implementations can simply return this.

Specified by:

asStartMetadata in interface DataSourceMetadata

matches

public boolean matches(DataSourceMetadata other)

Description copied from interface: DataSourceMetadata

Returns true if any information present in this instance matches analogous information from "other" and so they are conflict-free. In other words, "one.plus(two)" and "two.plus(one)" should return equal instances if "one" matches "two". One simple way to implement this is to make it the same as "equals", although that doesn't allow for partitioned metadata. Behavior is undefined if you pass in an instance of a different class from this one.

Specified by:

matches in interface DataSourceMetadata

Parameters:

other - another instance

Returns:

true or false

plus

public DataSourceMetadata plus(DataSourceMetadata other)

Description copied from interface: DataSourceMetadata

Returns a copy of this instance with "other" merged in. Any conflicts should be resolved in favor of information from "other". Behavior is undefined if you pass in an instance of a different class from this one.

Specified by:

plus in interface DataSourceMetadata

Parameters:

other - another instance

Returns:

merged copy

minus

public DataSourceMetadata minus(DataSourceMetadata other)

Description copied from interface: DataSourceMetadata

Returns a copy of this instance with "other" subtracted. Behavior is undefined if you pass in an instance of a different class from this one.

Specified by:

minus in interface DataSourceMetadata

Parameters:

other - another instance

Returns:

subtracted copy

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