Package dk.netarkivet.common.distribute

Class HTTPRemoteFileRegistry

java.lang.Object

dk.netarkivet.common.distribute.HTTPRemoteFileRegistry

All Implemented Interfaces:

CleanupIF

Direct Known Subclasses:

HTTPSRemoteFileRegistry

public class HTTPRemoteFileRegistry
extends Object
implements CleanupIF

This is a registry for HTTP remote file, meant for serving registered files to remote hosts. The embedded webserver handling remote files for HTTPRemoteFile point-to-point communication. Optimised to use direct transfer on local machine.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	HTTPRemoteFileRegistry.HTTPRemoteFileRegistryHandler	A handler for the registry.

Field Summary

Fields

Modifier and Type	Field	Description
protected static HTTPRemoteFileRegistry	instance	The unique instance.
protected int	port	Port number for generating URLs.
protected org.mortbay.jetty.Server	server	The embedded webserver.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	HTTPRemoteFileRegistry()	Initialise the registry.

Method Summary

Modifier and Type	Method	Description
void	cleanup()	Stops the server and nulls the instance.
static HTTPRemoteFileRegistry	getInstance()	Get the unique instance.
protected String	getProtocol()	Get the protocol part of URLs, that is HTTP.
protected URLConnection	openConnection(URL url)	Open a connection to an URL in a registry.
URL	registerFile(File file, boolean deletable)	Register a file for serving to an endpoint.
protected void	startServer()	Start the server, including a handler that responds with registered files, removes registered files on request, and gives 404 otherwise.

Methods inherited from class java.lang.Object

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

Field Detail

instance

protected static HTTPRemoteFileRegistry instance

The unique instance.

port

protected final int port

Port number for generating URLs. Read from settings.

server

protected org.mortbay.jetty.Server server

The embedded webserver.

Constructor Detail

HTTPRemoteFileRegistry

protected HTTPRemoteFileRegistry()

Initialise the registry. This includes registering an HTTP server for getting the files from this machine.

Throws:

IOFailure - if it cannot be initialised.

Method Detail

startServer

protected void startServer()

Start the server, including a handler that responds with registered files, removes registered files on request, and gives 404 otherwise.

Throws:

IOFailure - if it cannot be initialised.

getProtocol

protected String getProtocol()

Get the protocol part of URLs, that is HTTP.

Returns:

"http", the protocol.

getInstance

public static HTTPRemoteFileRegistry getInstance()

Get the unique instance.

Returns:

The unique instance.

registerFile

public URL registerFile(File file,
                        boolean deletable)

Register a file for serving to an endpoint.

Parameters:

file - The file to register.

deletable - Whether it should be deleted on cleanup.

Returns:

The URL it will be served as. It will be uniquely generated.

Throws:

ArgumentNotValid - on null or unreadable file.

IOFailure - on any trouble registerring the file

openConnection

protected URLConnection openConnection(URL url)
                                throws IOException

Open a connection to an URL in a registry.

Parameters:

url - The URL to open connection to.

Returns:

a connection to an URL in a registry

Throws:

IOException - If unable to open the connection.

cleanup

public void cleanup()

Stops the server and nulls the instance.

Specified by:

cleanup in interface CleanupIF