org.dspace.ctask.replicate.EstimateAIPSize Maven / Gradle / Ivy
/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.ctask.replicate;
import java.io.IOException;
import java.sql.SQLException;
import org.dspace.content.DSpaceObject;
import org.dspace.curate.AbstractCurationTask;
import org.dspace.curate.Curator;
import org.dspace.curate.Distributive;
import org.dspace.pack.Packer;
import org.dspace.pack.PackerFactory;
/**
* EstimateAIPSize task computes the total number of bytes in all the content
* files (viz Bitstreams, including logos for containers) of the passed object.
* If a container, it includes all it's members or children. Note that this
* is quite inexact (and always too small), since real AIPs will include
* metadata, etc, but should be adequate for a gross approximation. Also note
* that the size estimates exclude files in bundles that are filtered, as
* defined by setContentFilter on the AIP Packer.
*
* @author richardrodgers
* @see TransmitAIP
*/
@Distributive
public class EstimateAIPSize extends AbstractCurationTask
{
@Override
public int perform(DSpaceObject dso) throws IOException {
Packer packer = PackerFactory.instance(dso);
try
{
// just report the size
long size = packer.size("");
String msg = "ID: " + dso.getHandle() + " (" + dso.getName() +
") estimated AIP size: " + scaledSize(size, 0);
report(msg);
setResult(scaledSize(size, 0));
}
catch (SQLException sqlE)
{
throw new IOException(sqlE);
}
return Curator.CURATE_SUCCESS;
}
String[] prefixes = { "", "kilo", "mega", "giga", "tera", "peta", "exa" };
private String scaledSize(long size, int idx)
{
return (size < 1000L) ? size + " " + prefixes[idx] + "bytes" :
scaledSize(size / 1000L, idx + 1);
}
}