Package com.activeviam.io

Class LimitedByteArrayOutputStream

java.lang.Object

java.io.OutputStream

java.io.ByteArrayOutputStream

com.activeviam.io.LimitedByteArrayOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

Direct Known Subclasses:

CompressionOutputStream

public class LimitedByteArrayOutputStream
extends ByteArrayOutputStream

A ByteArrayOutputStream that throws an ActiveViamRuntimeException when reaching the selected size limit in order to avoid OOM Errors when the underlying byte buffer overflows.

The underlying byte array must be strictly smaller than the limit defining this output stream.

Author:

ActiveViam

Field Summary

Fields

Modifier and Type	Field	Description
static final long	MB	One megabyte.
static final int	SOFT_MAX_ARRAY_LENGTH	A soft maximum array length imposed by array growth computations.

Constructor Summary

Constructors

Constructor	Description
LimitedByteArrayOutputStream(int limit)	Constructor.
LimitedByteArrayOutputStream(int initialSize, int limit)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int byteToWrite)

Methods inherited from class java.io.ByteArrayOutputStream

close, reset, size, toByteArray, toString, toString, toString, toString, writeBytes, writeTo

Methods inherited from class java.io.OutputStream

flush, nullOutputStream

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

SOFT_MAX_ARRAY_LENGTH

public static final int SOFT_MAX_ARRAY_LENGTH

A soft maximum array length imposed by array growth computations. Some JVMs (such as HotSpot) have an implementation limit that will cause

OutOfMemoryError("Requested array size exceeds VM limit")

to be thrown if a request is made to allocate an array of some length near Integer.MAX_VALUE, even if there is sufficient heap available. The actual limit might depend on some JVM implementation-specific characteristics such as the object header size. The soft maximum value is chosen conservatively to be smaller than any JVM implementation limit that is likely to be encountered.

See Also:

• Constant Field Values

MB

public static final long MB

One megabyte.

See Also:

• Constant Field Values

Constructor Details

LimitedByteArrayOutputStream

public LimitedByteArrayOutputStream(int initialSize,
 int limit)

Constructor.

Parameters:

initialSize - the initial size of the byte array. Must be strictly smaller than the limit.

limit - the selected maximum size of the underlying byte array

LimitedByteArrayOutputStream

public LimitedByteArrayOutputStream(int limit)

Constructor.

Parameters:

limit - the selected maximum size of the underlying byte array. Must be strictly greater than the default byte array size.

Method Details

write

public void write(int byteToWrite)

Overrides:

write in class ByteArrayOutputStream

write

public void write(byte[] b)

Overrides:

write in class OutputStream

write

public void write(byte[] b,
 int off,
 int len)

Overrides:

write in class ByteArrayOutputStream