public class PoolingByteArrayOutputStream extends ByteArrayOutputStream
ByteArrayOutputStream
that uses a pool of byte[] buffers instead
of always allocating them fresh, saving on heap churn.buf, count
Constructor and Description |
---|
PoolingByteArrayOutputStream(ByteArrayPool pool)
Constructs a new PoolingByteArrayOutputStream with a default size.
|
PoolingByteArrayOutputStream(ByteArrayPool pool,
int size)
Constructs a new
ByteArrayOutputStream with a default size of size bytes. |
Modifier and Type | Method and Description |
---|---|
void |
close()
Closing a ByteArrayOutputStream has no effect.
|
void |
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
void |
write(byte[] buffer,
int offset,
int len)
Writes
len bytes from the specified byte array
starting at offset off to this byte array output stream. |
void |
write(int oneByte)
Writes the specified byte to this byte array output stream.
|
reset, size, toByteArray, toString, toString, toString, writeTo
flush, write
public PoolingByteArrayOutputStream(ByteArrayPool pool)
public PoolingByteArrayOutputStream(ByteArrayPool pool, int size)
ByteArrayOutputStream
with a default size of size
bytes. If
more than size
bytes are written to this instance, the underlying byte array will
expand.size
- initial size for the underlying byte array. The value will be pinned to a default
minimum size.public void close() throws IOException
ByteArrayOutputStream
close
in interface Closeable
close
in interface AutoCloseable
close
in class ByteArrayOutputStream
IOException
- if an I/O error occurs.public void finalize()
Object
finalize
method to dispose of
system resources or to perform other cleanup.
The general contract of finalize
is that it is invoked
if and when the JavaTM virtual
machine has determined that there is no longer any
means by which this object can be accessed by any thread that has
not yet died, except as a result of an action taken by the
finalization of some other object or class which is ready to be
finalized. The finalize
method may take any action, including
making this object available again to other threads; the usual purpose
of finalize
, however, is to perform cleanup actions before
the object is irrevocably discarded. For example, the finalize method
for an object that represents an input/output connection might perform
explicit I/O transactions to break the connection before the object is
permanently discarded.
The finalize
method of class Object
performs no
special action; it simply returns normally. Subclasses of
Object
may override this definition.
The Java programming language does not guarantee which thread will
invoke the finalize
method for any given object. It is
guaranteed, however, that the thread that invokes finalize will not
be holding any user-visible synchronization locks when finalize is
invoked. If an uncaught exception is thrown by the finalize method,
the exception is ignored and finalization of that object terminates.
After the finalize
method has been invoked for an object, no
further action is taken until the Java virtual machine has again
determined that there is no longer any means by which this object can
be accessed by any thread that has not yet died, including possible
actions by other objects or classes which are ready to be finalized,
at which point the object may be discarded.
The finalize
method is never invoked more than once by a Java
virtual machine for any given object.
Any exception thrown by the finalize
method causes
the finalization of this object to be halted, but is otherwise
ignored.
public void write(byte[] buffer, int offset, int len)
ByteArrayOutputStream
len
bytes from the specified byte array
starting at offset off
to this byte array output stream.write
in class ByteArrayOutputStream
buffer
- the data.offset
- the start offset in the data.len
- the number of bytes to write.public void write(int oneByte)
ByteArrayOutputStream
write
in class ByteArrayOutputStream
oneByte
- the byte to be written.