eu.europeana.cloud.service.mcs.persistent.swift

Interface ContentDAO

All Known Implementing Classes:

SwiftContentDAO

public interface ContentDAO

Content storage DAOs interface .

Method Summary

Methods

Modifier and Type	Method and Description
void	copyContent(String sourceObjectId, String trgObjectId) Copies content of one storage object to another.
void	deleteContent(String fileName) Deletes storage object identified by fileName.
void	getContent(String fileName, long start, long end, OutputStream os) Retrieves content of file from storage.
PutResult	putContent(String fileName, InputStream data) Puts given content to storage under given fileName.

Method Detail

copyContent

void copyContent(String sourceObjectId,
               String trgObjectId)
                 throws eu.europeana.cloud.service.mcs.exception.FileNotExistsException,
                        eu.europeana.cloud.service.mcs.exception.FileAlreadyExistsException

Copies content of one storage object to another.

Parameters:

sourceObjectId - name of the source storage object

trgObjectId - name of the target storage object

Throws:

eu.europeana.cloud.service.mcs.exception.FileNotExistsException - if source object does not exist in the storage

eu.europeana.cloud.service.mcs.exception.FileAlreadyExistsException

deleteContent

void deleteContent(String fileName)
                   throws eu.europeana.cloud.service.mcs.exception.FileNotExistsException

Deletes storage object identified by fileName.

Parameters:

fileName - name of the object to be deleted

Throws:

eu.europeana.cloud.service.mcs.exception.FileNotExistsException - if object does not exist in the storage

getContent

void getContent(String fileName,
              long start,
              long end,
              OutputStream os)
                throws IOException,
                       eu.europeana.cloud.service.mcs.exception.FileNotExistsException

Retrieves content of file from storage. Can retrieve range of bytes of the file.

Parameters:

fileName - name of the file to retrieve

start - first offset included in the response. If equal to -1, ignored.

end - last offset included in the response (inclusive). If equal to -1, ignored.

os - outputstream the content is written to

Throws:

IOException - if an I/O error occurs

eu.europeana.cloud.service.mcs.exception.FileNotExistsException - if object does not exist in the storage

putContent

PutResult putContent(String fileName,
                   InputStream data)
                     throws IOException

Puts given content to storage under given fileName. Counts and returns content length and md5 checksum from given data.

Parameters:

fileName - name of the file

data - content of file to be saved

Returns:

md5 and content length

Throws:

IOException - if an I/O error occurs