Package org.apache.lucene.replicator.nrt

Class CopyJob

java.lang.Object

org.apache.lucene.replicator.nrt.CopyJob

All Implemented Interfaces:

Comparable<CopyJob>

public abstract class CopyJob
extends Object
implements Comparable<CopyJob>

Handles copying one set of files, e.g. all files for a new NRT point, or files for pre-copying a merged segment. This notifies the caller via OnceDone when the job finishes or failed.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	CopyJob.OnceDone	Callback invoked by CopyJob once all files have (finally) finished copying

Field Summary

Fields

Modifier and Type	Field	Description
protected String	cancelReason
protected final Map<String,String>	copiedFiles
protected CopyOneFile	current
protected final ReplicaNode	dest
protected Throwable	exc
protected final Map<String,FileMetaData>	files
final boolean	highPriority	True for an NRT sync, false for pre-copying a newly merged segment
final CopyJob.OnceDone	onceDone
final long	ord
final String	reason
final long	startNS
protected final List<Map.Entry<String,FileMetaData>>	toCopy
protected long	totBytes
protected long	totBytesCopied

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CopyJob(String reason, Map<String,FileMetaData> files, ReplicaNode dest, boolean highPriority, CopyJob.OnceDone onceDone)

Method Summary

Modifier and Type	Method	Description
void	cancel(String reason, Throwable exc)
abstract boolean	conflicts(CopyJob other)	Return true if this job is trying to copy any of the same files as the other job
abstract void	finish()	Renames all copied (tmp) files to their true file names
abstract CopyState	getCopyState()
abstract boolean	getFailed()
abstract Set<String>	getFileNames()	Returns all file names referenced in this copy job
abstract Set<String>	getFileNamesToCopy()	Returns only those file names (a subset of getFileNames()) that need to be copied
abstract long	getTotalBytesCopied()
protected abstract CopyOneFile	newCopyOneFile(CopyOneFile current)
abstract void	runBlocking()	Use current thread (blocking) to do all copying and then return once done, or throw exception on failure
abstract void	start()	Begin copying files
void	transferAndCancel(CopyJob prevJob)	Transfers whatever tmp files were already copied in this previous job and cancels the previous job

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Comparable

compareTo

Field Details

dest

protected final ReplicaNode dest

files

protected final Map<String,FileMetaData> files

ord

public final long ord

highPriority

public final boolean highPriority

True for an NRT sync, false for pre-copying a newly merged segment

onceDone

public final CopyJob.OnceDone onceDone

startNS

public final long startNS

reason

public final String reason

toCopy

protected final List<Map.Entry<String,FileMetaData>> toCopy

totBytes

protected long totBytes

totBytesCopied

protected long totBytesCopied

current

protected CopyOneFile current

exc

protected volatile Throwable exc

cancelReason

protected volatile String cancelReason

copiedFiles

protected final Map<String,String> copiedFiles

Constructor Details

CopyJob

protected CopyJob(String reason,
 Map<String,FileMetaData> files,
 ReplicaNode dest,
 boolean highPriority,
 CopyJob.OnceDone onceDone)
           throws IOException

Throws:

IOException

Method Details

transferAndCancel

public void transferAndCancel(CopyJob prevJob)
                       throws IOException

Transfers whatever tmp files were already copied in this previous job and cancels the previous job

Throws:

IOException

newCopyOneFile

protected abstract CopyOneFile newCopyOneFile(CopyOneFile current)

start

public abstract void start()
                    throws IOException

Begin copying files

Throws:

IOException

runBlocking

public abstract void runBlocking()
                          throws Exception

Use current thread (blocking) to do all copying and then return once done, or throw exception on failure

Throws:

Exception

cancel

public void cancel(String reason,
 Throwable exc)
            throws IOException

Throws:

IOException

conflicts

public abstract boolean conflicts(CopyJob other)

Return true if this job is trying to copy any of the same files as the other job

finish

public abstract void finish()
                     throws IOException

Renames all copied (tmp) files to their true file names

Throws:

IOException

getFailed

public abstract boolean getFailed()

getFileNamesToCopy

public abstract Set<String> getFileNamesToCopy()

Returns only those file names (a subset of getFileNames()) that need to be copied

getFileNames

public abstract Set<String> getFileNames()

Returns all file names referenced in this copy job

getCopyState

public abstract CopyState getCopyState()

getTotalBytesCopied

public abstract long getTotalBytesCopied()