GCSFileDownloader

public class GCSFileDownloader
extends GCSFileDownloaderBase implements IFileDownloader

java.lang.Object
↳	com.android.tradefed.util.gcs.GCSCommon
	↳	com.android.tradefed.util.gcs.GCSFileDownloaderBase
		↳	com.android.tradefed.util.GCSFileDownloader

File downloader to download file from google cloud storage (GCS).

Summary

Public constructors
`GCSFileDownloader()`
`GCSFileDownloader(Boolean createEmptyFile)`
`GCSFileDownloader(File jsonKeyFile)`

Public methods
`static File`	`createTempFileForRemote(String remoteFilePath, File rootDir)`
`void`	`downloadFile(String remotePath, File destFile)`
`File`	`downloadFile(String remoteFilePath)` Download file from GCS.
`boolean`	`isFresh(File localFile, String remotePath)` Check local file's freshness.

Protected methods
`void`	`clearCache()`
`void`	`downloadFile(String bucketName, String remoteFilename, File localFile)`
`Storage`	`getStorage( scopes)` Override the implementation in base to support credential based on TF options.
`String[]`	`parseGcsPath(String remotePath)`

Public constructors

GCSFileDownloader

public GCSFileDownloader ()

GCSFileDownloader

public GCSFileDownloader (Boolean createEmptyFile)

Parameters
`createEmptyFile`	`Boolean`

GCSFileDownloader

public GCSFileDownloader (File jsonKeyFile)

Parameters
`jsonKeyFile`	`File`

Public methods

createTempFileForRemote

public static File createTempFileForRemote (String remoteFilePath, 
                File rootDir)

Parameters
`remoteFilePath`	`String`
`rootDir`	`File`

Returns
`File`

Throws
`BuildRetrievalError`

downloadFile

public void downloadFile (String remotePath, 
                File destFile)

Parameters
`remotePath`	`String`
`destFile`	`File`

Throws
`BuildRetrievalError`

downloadFile

public File downloadFile (String remoteFilePath)

Download file from GCS.

Right now only support GCS path.

Parameters
`remoteFilePath`	`String`: gs://bucket/file/path format GCS path.

Returns
`File`	local file

Throws
	com.android.tradefed.build.BuildRetrievalError
`BuildRetrievalError`

isFresh

public boolean isFresh (File localFile, 
                String remotePath)

Check local file's freshness. If local file is the same as remote file, then it's fresh. If not, local file is stale. This is mainly used for cache. The default implementation will always return true, so if the file is immutable it will never need to check freshness.

Parameters
`localFile`	`File`: local file.
`remotePath`	`String`: remote file path.

Returns
`boolean`	True if local file is fresh, otherwise false.

Throws
`BuildRetrievalError`

Protected methods

clearCache

protected void clearCache ()

downloadFile

protected void downloadFile (String bucketName, 
                String remoteFilename, 
                File localFile)

Parameters
`bucketName`	`String`
`remoteFilename`	`String`
`localFile`	`File`

Throws
`BuildRetrievalError`

getStorage

protected Storage getStorage ( scopes)

Override the implementation in base to support credential based on TF options.

Parameters
`scopes`	: specific scopes to request credential for.

Returns
`Storage`	`Storage` object of the GCS bucket

Throws
	IOException

parseGcsPath

protected String[] parseGcsPath (String remotePath)

Parameters
`remotePath`	`String`

Returns
`String[]`

Throws
`BuildRetrievalError`