Package org.subethamail.smtp.io

Class DeferredFileOutputStream

java.lang.Object

java.io.OutputStream

org.subethamail.smtp.io.ThresholdingOutputStream

org.subethamail.smtp.io.DeferredFileOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class DeferredFileOutputStream
extends ThresholdingOutputStream

This works like a ByteArrayOutputStream until a certain size is reached, then creates a temp file and acts like a buffered FileOutputStream. The data can be retreived afterwards by calling getInputStream(). When this object is closed, the temporary file is deleted. You can no longer call getInputStream().

Author:

Jeff Schnitzer

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TMPFILE_PREFIX
static final String	TMPFILE_SUFFIX

Fields inherited from class org.subethamail.smtp.io.ThresholdingOutputStream

output

Constructor Summary

Constructors

Constructor	Description
DeferredFileOutputStream(int transitionSize)

Method Summary

Modifier and Type	Method	Description
void	close()
InputStream	getInputStream()	Closes the output stream and creates an InputStream on the same data.
protected void	thresholdReached(int current, int predicted)	Called when the threshold is about to be exceeded.

Methods inherited from class org.subethamail.smtp.io.ThresholdingOutputStream

checkThreshold, flush, getThreshold, write, write, write

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

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

Field Details

TMPFILE_PREFIX

public static final String TMPFILE_PREFIX

See Also:

• Constant Field Values

TMPFILE_SUFFIX

public static final String TMPFILE_SUFFIX

See Also:

• Constant Field Values

Constructor Details

DeferredFileOutputStream

public DeferredFileOutputStream(int transitionSize)

Parameters:

transitionSize - is the number of bytes at which to convert from a byte array to a real file.

Method Details

thresholdReached

protected void thresholdReached(int current,
 int predicted)
                         throws IOException

Description copied from class: ThresholdingOutputStream

Called when the threshold is about to be exceeded. This isn't exact; it's called whenever a write would occur that would cross the amount. Once it is called, it isn't called again.

Specified by:

thresholdReached in class ThresholdingOutputStream

Parameters:

current - is the current number of bytes that have been written

predicted - is the total number after the write completes

Throws:

IOException

getInputStream

public InputStream getInputStream()
                           throws IOException

Closes the output stream and creates an InputStream on the same data.

Returns:

either a BetterByteArrayOutputStream or buffered FileInputStream, depending on what state we are in.

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class ThresholdingOutputStream

Throws:

IOException