org.apache.nifi.controller.repository.io

Class FlowFileAccessInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.nifi.controller.repository.io.FlowFileAccessInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class FlowFileAccessInputStream
extends FilterInputStream

Wraps an InputStream so that if any IOException is thrown, it will be wrapped in a FlowFileAccessException. We do this to isolate IOExceptions thrown by the framework from those thrown by user code. If thrown by the framework, it generally indicates a problem communicating with the Content Repository and session rollback is often appropriate so that the FlowFile can be processed again.

Field Summary

Fields

Modifier and Type	Field and Description
private long	bytesConsumed
private ContentClaim	claim
private FlowFile	flowFile
private ContentNotFoundException	thrown

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
FlowFileAccessInputStream(InputStream in, FlowFile flowFile, ContentClaim claim)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
private void	ensureAllContentRead()
ContentNotFoundException	getContentNotFoundException()
void	mark(int n)
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)

Methods inherited from class java.lang.Object

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

Field Detail

flowFile

private final FlowFile flowFile

claim

private final ContentClaim claim

bytesConsumed

private long bytesConsumed

thrown

private ContentNotFoundException thrown

Constructor Detail

FlowFileAccessInputStream

public FlowFileAccessInputStream(InputStream in,
                                 FlowFile flowFile,
                                 ContentClaim claim)

Method Detail

ensureAllContentRead

private void ensureAllContentRead()
                           throws ContentNotFoundException

Throws:

ContentNotFoundException

getContentNotFoundException

public ContentNotFoundException getContentNotFoundException()

Returns:

the ContentNotFoundException that was thrown by this stream, or null if no such Exception was thrown

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

read

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

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class FilterInputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class FilterInputStream

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class FilterInputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class FilterInputStream

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class FilterInputStream

Throws:

IOException

mark

public void mark(int n)

Overrides:

mark in class FilterInputStream