org.apache.solr.core.backup.repository

Interface BackupRepository

All Superinterfaces:

AutoCloseable, Closeable, NamedListInitializedPlugin

All Known Implementing Classes:

HdfsBackupRepository, LocalFileSystemRepository

public interface BackupRepository
extends NamedListInitializedPlugin, Closeable

This interface defines the functionality required to backup/restore Solr indexes to an arbitrary storage system.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	BackupRepository.PathType This enumeration defines the type of a given path.

Method Summary

Modifier and Type	Method and Description
void	copyFileFrom(Directory sourceDir, String fileName, URI dest) Copy a file from specified sourceDir to the destination repository (i.e.
void	copyFileTo(URI sourceRepo, String fileName, Directory dest) Copy a file from specified sourceRepo to the destination directory (i.e.
void	createDirectory(URI path) This method creates a directory at the specified path.
OutputStream	createOutput(URI path) This method returns a OutputStream instance for the specified path
URI	createURI(String path) This method returns the URI representation for the specified path.
void	deleteDirectory(URI path) This method deletes a directory at the specified path.
boolean	exists(URI path) This method checks if the specified path exists in this repository.
default String	getBackupLocation(String override) This method returns the location where the backup should be stored (or restored from).
<T> T	getConfigProperty(String name) This method returns the value of the specified configuration property.
BackupRepository.PathType	getPathType(URI path) This method returns the type of a specified path
String[]	listAll(URI path) This method returns all the entries (files and directories) in the specified directory.
IndexInput	openInput(URI dirPath, String fileName, IOContext ctx) This method returns a Lucene input stream reading an existing file.
URI	resolve(URI baseUri, String... pathComponents) This method resolves a URI using the specified path components (as method arguments).

Methods inherited from interface org.apache.solr.util.plugin.NamedListInitializedPlugin

init

Methods inherited from interface java.io.Closeable

close

Method Detail

getBackupLocation

default String getBackupLocation(String override)

This method returns the location where the backup should be stored (or restored from).

Parameters:

override - The location parameter supplied by the user.

Returns:

If override is not null then return the same value Otherwise return the default configuration value for the CoreAdminParams.BACKUP_LOCATION parameter.

getConfigProperty

<T> T getConfigProperty(String name)

This method returns the value of the specified configuration property.

createURI

URI createURI(String path)

This method returns the URI representation for the specified path. Note - the specified path could be a fully qualified URI OR a relative path for a file-system.

Parameters:

path - The path specified by the user.

Returns:

the URI representation of the user supplied value

resolve

URI resolve(URI baseUri,
            String... pathComponents)

This method resolves a URI using the specified path components (as method arguments).

Parameters:

baseUri - The base URI to use for creating the path

pathComponents - The directory (or file-name) to be included in the URI.

Returns:

A URI containing absolute path

exists

boolean exists(URI path)
        throws IOException

This method checks if the specified path exists in this repository.

Parameters:

path - The path whose existence needs to be checked.

Returns:

if the specified path exists in this repository.

Throws:

IOException - in case of errors

getPathType

BackupRepository.PathType getPathType(URI path)
                               throws IOException

This method returns the type of a specified path

Parameters:

path - The path whose type needs to be checked.

Returns:

the BackupRepository.PathType for the specified path

Throws:

IOException - in case of errors

listAll

String[] listAll(URI path)
          throws IOException

This method returns all the entries (files and directories) in the specified directory.

Parameters:

path - The directory path

Returns:

an array of strings, one for each entry in the directory

Throws:

IOException - in case of errors

openInput

IndexInput openInput(URI dirPath,
                     String fileName,
                     IOContext ctx)
              throws IOException

This method returns a Lucene input stream reading an existing file.

Parameters:

dirPath - The parent directory of the file to be read

fileName - The name of the file to be read

ctx - the Lucene IO context

Returns:

Lucene IndexInput reference

Throws:

IOException - in case of errors

createOutput

OutputStream createOutput(URI path)
                   throws IOException

This method returns a OutputStream instance for the specified path

Parameters:

path - The path for which OutputStream needs to be created

Returns:

OutputStream instance for the specified path

Throws:

IOException - in case of errors

createDirectory

void createDirectory(URI path)
              throws IOException

This method creates a directory at the specified path.

Parameters:

path - The path where the directory needs to be created.

Throws:

IOException - in case of errors

deleteDirectory

void deleteDirectory(URI path)
              throws IOException

This method deletes a directory at the specified path.

Parameters:

path - The path referring to the directory to be deleted.

Throws:

IOException - in case of errors

copyFileFrom

void copyFileFrom(Directory sourceDir,
                  String fileName,
                  URI dest)
           throws IOException

Copy a file from specified sourceDir to the destination repository (i.e. backup).

Parameters:

sourceDir - The source directory hosting the file to be copied.

fileName - The name of the file to by copied

dest - The destination backup location.

Throws:

IOException - in case of errors

copyFileTo

void copyFileTo(URI sourceRepo,
                String fileName,
                Directory dest)
         throws IOException

Copy a file from specified sourceRepo to the destination directory (i.e. restore).

Parameters:

sourceRepo - The source URI hosting the file to be copied.

fileName - The name of the file to by copied

dest - The destination where the file should be copied.

Throws:

IOException - in case of errors.