org.apache.manifoldcf.crawler.connectors.rss
Class DataCache

java.lang.Object
  org.apache.manifoldcf.crawler.connectors.rss.DataCache

public class DataCache
extends java.lang.Object

This class is a cache of a specific URL's data. It's fetched early and kept, so that (1) an accurate data length can be found, and (2) we can compute a version checksum.

Field Summary

static java.lang.String	_rcsid
protected java.util.HashMap	cacheData

Constructor Summary

DataCache()
Constructor.

Method Summary

long	addData(org.apache.manifoldcf.crawler.interfaces.IVersionActivity activities, java.lang.String documentIdentifier, java.io.InputStream dataStream) Add binary data entry into the cache.
void	deleteData(java.lang.String documentIdentifier) Delete specified item of data.
java.io.InputStream	getData(java.lang.String documentIdentifier) Fetch binary data entry from the cache.
long	getDataLength(java.lang.String documentIdentifier) Fetch binary data length.

Methods inherited from class java.lang.Object

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

Field Detail

_rcsid

public static final java.lang.String _rcsid

See Also:

Constant Field Values

cacheData

protected java.util.HashMap cacheData

Constructor Detail

DataCache

public DataCache()

Constructor.

Method Detail

addData

public long addData(org.apache.manifoldcf.crawler.interfaces.IVersionActivity activities,
                    java.lang.String documentIdentifier,
                    java.io.InputStream dataStream)
             throws org.apache.manifoldcf.core.interfaces.ManifoldCFException,
                    org.apache.manifoldcf.agents.interfaces.ServiceInterruption

Add binary data entry into the cache. Does NOT close the input stream when done!

Parameters:

documentIdentifier - is the document identifier (url).

dataStream - is the data stream.

Returns:

the checksum value.

Throws:

org.apache.manifoldcf.core.interfaces.ManifoldCFException

org.apache.manifoldcf.agents.interfaces.ServiceInterruption

getDataLength

public long getDataLength(java.lang.String documentIdentifier)
                   throws org.apache.manifoldcf.core.interfaces.ManifoldCFException

Fetch binary data length.

Parameters:

documentIdentifier - is the document identifier.

Returns:

the length.

Throws:

org.apache.manifoldcf.core.interfaces.ManifoldCFException

getData

public java.io.InputStream getData(java.lang.String documentIdentifier)
                            throws org.apache.manifoldcf.core.interfaces.ManifoldCFException

Fetch binary data entry from the cache.

Parameters:

documentIdentifier - is the document identifier (url).

Returns:

a binary data stream.

Throws:

org.apache.manifoldcf.core.interfaces.ManifoldCFException

deleteData

public void deleteData(java.lang.String documentIdentifier)

Delete specified item of data.

Parameters:

documentIdentifier - is the document identifier (url).