org.neo4j.kernel.api.impl.index.storage

Class FailureStorage

java.lang.Object

org.neo4j.kernel.api.impl.index.storage.FailureStorage

public class FailureStorage
extends Object

Helper class for storing a failure message that happens during an OutOfDisk situation in a pre-allocated file

Constructor Summary

Constructors

Constructor and Description
FailureStorage(org.neo4j.io.fs.FileSystemAbstraction fs, FolderLayout folderLayout)
FailureStorage(org.neo4j.io.fs.FileSystemAbstraction fs, FolderLayout folderLayout, String failureFileName)

Method Summary

Modifier and Type	Method and Description
void	clearForIndex() Delete failure file for the given index id
String	loadIndexFailure()
void	reserveForIndex() Create/reserve an empty failure file for the given indexId.
void	storeIndexFailure(String failure) Store failure in failure file for index with the given id

Methods inherited from class java.lang.Object

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

Constructor Detail

FailureStorage

public FailureStorage(org.neo4j.io.fs.FileSystemAbstraction fs,
                      FolderLayout folderLayout,
                      String failureFileName)

Parameters:

failureFileName - name of failure files to be created

folderLayout - describing where failure files should be stored

FailureStorage

public FailureStorage(org.neo4j.io.fs.FileSystemAbstraction fs,
                      FolderLayout folderLayout)

Method Detail

reserveForIndex

public void reserveForIndex()
                     throws IOException

Create/reserve an empty failure file for the given indexId. This will overwrite any pre-existing failure file.

Throws:

IOException - if the failure file could not be created

clearForIndex

public void clearForIndex()

Delete failure file for the given index id

loadIndexFailure

public String loadIndexFailure()

Returns:

the failure, if any. Otherwise null marking no failure.

storeIndexFailure

public void storeIndexFailure(String failure)
                       throws IOException

Store failure in failure file for index with the given id

Parameters:

failure - message describing the failure that needs to be stored

Throws:

IOException - if the failure could not be stored