org.apache.drill.exec.store.sys

Class BasePersistentStore<V>

java.lang.Object

org.apache.drill.exec.store.sys.BasePersistentStore<V>

All Implemented Interfaces:

AutoCloseable, PersistentStore<V>

Direct Known Subclasses:

InMemoryStore, LocalPersistentStore, NoWriteLocalStore, ZookeeperPersistentStore

public abstract class BasePersistentStore<V>
extends Object
implements PersistentStore<V>

Constructor Summary

Constructors

Constructor and Description
BasePersistentStore()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(String key, DataChangeVersion version) By default contains with version will behave the same way as without version.
V	get(String key, DataChangeVersion version) By default get with version will behave the same way as without version.
Iterator<Map.Entry<String,V>>	getAll() Returns an iterator of entries.
void	put(String key, V value, DataChangeVersion version) By default put with version will behave the same way as without version.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.store.sys.PersistentStore

contains, delete, get, getMode, getRange, put, putIfAbsent

Methods inherited from interface java.lang.AutoCloseable

close

Constructor Detail

BasePersistentStore

public BasePersistentStore()

Method Detail

getAll

public Iterator<Map.Entry<String,V>> getAll()

Description copied from interface: PersistentStore

Returns an iterator of entries.

Specified by:

getAll in interface PersistentStore<V>

contains

public boolean contains(String key,
               DataChangeVersion version)

By default contains with version will behave the same way as without version. Override this method to add version support.

Specified by:

contains in interface PersistentStore<V>

Parameters:

key - lookup key

version - version holder

Returns:

true if store contains lookup key, false otherwise

get

public V get(String key,
    DataChangeVersion version)

By default get with version will behave the same way as without version. Override this method to add version support.

Specified by:

get in interface PersistentStore<V>

Parameters:

key - lookup key

version - version holder

put

public void put(String key,
       V value,
       DataChangeVersion version)

By default put with version will behave the same way as without version. Override this method to add version support.

Specified by:

put in interface PersistentStore<V>

Parameters:

key - lookup key

value - value to store

version - version holder