org.springframework.cloud.deployer.resource.support

Class DownloadingUrlResource

java.lang.Object

org.springframework.core.io.AbstractResource

org.springframework.core.io.AbstractFileResolvingResource

org.springframework.core.io.UrlResource

org.springframework.cloud.deployer.resource.support.DownloadingUrlResource

All Implemented Interfaces:

org.springframework.core.io.InputStreamSource, org.springframework.core.io.Resource

public class DownloadingUrlResource
extends org.springframework.core.io.UrlResource

A Resource implementation that will download a UrlResource to a temp file when the is invoked.

Author:

Ilayaperumal Gopinathan, Mark Pollack

Constructor Summary

Constructors

Constructor and Description
DownloadingUrlResource(String uri) Create a new DownloadingUrlResource based on the given URI object.

Method Summary

Modifier and Type	Method and Description
String	getDescription()
File	getFile() Downloads the file from the HTTP location to a temporary file.

Methods inherited from class org.springframework.core.io.UrlResource

createRelative, equals, getFilename, getInputStream, getURI, getURL, hashCode, isFile

Methods inherited from class org.springframework.core.io.AbstractFileResolvingResource

contentLength, customizeConnection, customizeConnection, exists, getFile, getFileForLastModifiedCheck, isFile, isReadable, lastModified, readableChannel

Methods inherited from class org.springframework.core.io.AbstractResource

isOpen, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DownloadingUrlResource

public DownloadingUrlResource(String uri)
                       throws MalformedURLException

Create a new DownloadingUrlResource based on the given URI object.

Parameters:

uri - a URI

Throws:

MalformedURLException - if the given URL path is not valid

Method Detail

getFile

public File getFile()
             throws IOException

Downloads the file from the HTTP location to a temporary file. The temporary file uses the directory prefix "spring-cloud-deployer" and the filename is the SHA1 hash of the URL. The file will only be downloaded on the first invocation of this method.

Specified by:

getFile in interface org.springframework.core.io.Resource

Overrides:

getFile in class org.springframework.core.io.UrlResource

Returns:

The downloaded file.

Throws:

IOException - if there are errors downloading or writing the temporary file.

getDescription

public String getDescription()

Specified by:

getDescription in interface org.springframework.core.io.Resource

Overrides:

getDescription in class org.springframework.core.io.UrlResource