MemoryStore (Nemo Project 0.4 API)

java.lang.Object
- org.apache.nemo.runtime.executor.data.stores.AbstractBlockStore
- - org.apache.nemo.runtime.executor.data.stores.LocalBlockStore
  - - org.apache.nemo.runtime.executor.data.stores.MemoryStore

All Implemented Interfaces:: BlockStore

@ThreadSafe
public final class MemoryStore
extends LocalBlockStore

Store data in local memory.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`NonSerializedMemoryBlock`	`createBlock(java.lang.String blockId)`	Creates a new block.
`boolean`	`deleteBlock(java.lang.String blockId)`	Deletes a block from this store.
`void`	`writeBlock(Block block)`	Writes a committed block to this store.

Methods inherited from class org.apache.nemo.runtime.executor.data.stores.LocalBlockStore
getBlockMap, readBlock

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - createBlock
```
public NonSerializedMemoryBlock createBlock(java.lang.String blockId)
```
    Description copied from interface: BlockStore
    
    Creates a new block. A stale data created by previous failed task should be handled during the creation of new block.
    
    Parameters:
    
    blockId - the ID of the block to create.
    
    Returns:
    
    the created block.
    
    See Also:
    
    BlockStore.createBlock(String)
  - writeBlock
```
public void writeBlock(Block block)
```
    Writes a committed block to this store.
    
    Parameters:
    
    block - the block to write.
    
    Throws:
    
    BlockWriteException - if fail to write.
  - deleteBlock
```
public boolean deleteBlock(java.lang.String blockId)
```
    Description copied from interface: BlockStore
    
    Deletes a block from this store.
    
    Parameters:
    
    blockId - of the block.
    
    Returns:
    
    whether the partition exists or not.
    
    See Also:
    
    BlockStore.deleteBlock(String)