Package org.apache.nifi.controller.repository.io

Class ContentClaimInputStream

java.lang.Object

java.io.InputStream

org.apache.nifi.controller.repository.io.ContentClaimInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ContentClaimInputStream
extends InputStream

An InputStream that is provided a Content Repository, Content Claim, and offset into the Content Claim where a FlowFile's content begins, and is capable of reading the content from the Content Repository, as well as providing the ability to use mark(int)/reset() in order to re-read content without buffering it.

Field Summary

Fields

Modifier and Type	Field	Description
private InputStream	bufferedIn
private long	bytesConsumed
private final long	claimOffset
private final ContentClaim	contentClaim
private final ContentRepository	contentRepository
private long	currentOffset
private InputStream	delegate
private long	markOffset
private int	markReadLimit
private final PerformanceTracker	performanceTracker

Constructor Summary

Constructors

Constructor	Description
ContentClaimInputStream(ContentRepository contentRepository, ContentClaim contentClaim, long claimOffset, InputStream initialDelegate, PerformanceTracker performanceTracker)
ContentClaimInputStream(ContentRepository contentRepository, ContentClaim contentClaim, long claimOffset, PerformanceTracker performanceTracker)

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
private void	formDelegate()
long	getBytesConsumed()
long	getCurrentOffset()
private InputStream	getDelegate()
void	mark(int readLimit)	Marks the current position.
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()	Resets to the last marked position.
long	skip(long n)

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Field Details

contentRepository

private final ContentRepository contentRepository

contentClaim

private final ContentClaim contentClaim

claimOffset

private final long claimOffset

performanceTracker

private final PerformanceTracker performanceTracker

delegate

private InputStream delegate

bytesConsumed

private long bytesConsumed

currentOffset

private long currentOffset

markOffset

private long markOffset

bufferedIn

private InputStream bufferedIn

markReadLimit

private int markReadLimit

Constructor Details

ContentClaimInputStream

public ContentClaimInputStream(ContentRepository contentRepository,
 ContentClaim contentClaim,
 long claimOffset,
 PerformanceTracker performanceTracker)

ContentClaimInputStream

public ContentClaimInputStream(ContentRepository contentRepository,
 ContentClaim contentClaim,
 long claimOffset,
 InputStream initialDelegate,
 PerformanceTracker performanceTracker)

Method Details

getDelegate

private InputStream getDelegate()
                         throws IOException

Throws:

IOException

getBytesConsumed

public long getBytesConsumed()

getCurrentOffset

public long getCurrentOffset()

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

mark

public void mark(int readLimit)

Marks the current position. Can be returned to with reset().

Overrides:

mark in class InputStream

Parameters:

readLimit - hint on how much data should be buffered.

See Also:

• reset()

reset

public void reset()
           throws IOException

Resets to the last marked position.

Overrides:

reset in class InputStream

Throws:

IOException - Thrown when a mark position is not set or on other stream handling failures

See Also:

• mark(int)

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

formDelegate

private void formDelegate()
                   throws IOException

Throws:

IOException