com.evernote.client.conn.mobile

Class DiskBackedByteStore

java.lang.Object

java.io.OutputStream

com.evernote.client.conn.mobile.ByteStore

com.evernote.client.conn.mobile.DiskBackedByteStore

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class DiskBackedByteStore
extends ByteStore

Holds all the data in memory until a threshold is reached. Then it writes all the data on disk.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DiskBackedByteStore.Factory

Field Summary

Fields

Modifier and Type	Field and Description
protected com.evernote.client.conn.mobile.LazyByteArrayOutputStream	mByteArrayOutputStream
protected int	mBytesWritten
protected java.io.File	mCacheDir
protected java.io.File	mCacheFile
protected boolean	mClosed
protected java.io.OutputStream	mCurrentOutputStream
protected byte[]	mData
protected byte[]	mFileBuffer
protected java.io.FileOutputStream	mFileOutputStream
protected int	mMaxMemory The maximum amount of memory to use before writing to disk.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DiskBackedByteStore(java.io.File cacheDir, int maxMemory)

Method Summary

Modifier and Type	Method and Description
void	close()
int	getBytesWritten()
byte[]	getData() The returned byte buffer very likely has a different size than the bytes written.
void	reset() Reset all pointers.
protected boolean	swapped()
protected void	swapToDisk()
void	write(byte[] buffer, int offset, int count)
void	write(int oneByte)

Methods inherited from class java.io.OutputStream

flush, write

Methods inherited from class java.lang.Object

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

Field Detail

mMaxMemory

protected final int mMaxMemory

The maximum amount of memory to use before writing to disk.

mCacheDir

protected final java.io.File mCacheDir

mByteArrayOutputStream

protected final com.evernote.client.conn.mobile.LazyByteArrayOutputStream mByteArrayOutputStream

mCacheFile

protected java.io.File mCacheFile

mCurrentOutputStream

protected java.io.OutputStream mCurrentOutputStream

mFileOutputStream

protected java.io.FileOutputStream mFileOutputStream

mBytesWritten

protected int mBytesWritten

mClosed

protected boolean mClosed

mData

protected byte[] mData

mFileBuffer

protected byte[] mFileBuffer

Constructor Detail

DiskBackedByteStore

protected DiskBackedByteStore(java.io.File cacheDir,
                              int maxMemory)

Parameters:

cacheDir - A directory where the temporary data is stored.

maxMemory - The threshold before the data is written to disk.

Method Detail

write

public void write(byte[] buffer,
                  int offset,
                  int count)
           throws java.io.IOException

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

write

public void write(int oneByte)
           throws java.io.IOException

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

swapped

protected boolean swapped()

swapToDisk

protected void swapToDisk()
                   throws java.io.IOException

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException

getBytesWritten

public int getBytesWritten()

Specified by:

getBytesWritten in class ByteStore

Returns:

The number of bytes which this instance is holding at the moment.

getData

public byte[] getData()
               throws java.io.IOException

Description copied from class: ByteStore

The returned byte buffer very likely has a different size than the bytes written. If you want to read the data from the buffer only use the first ByteStore.getBytesWritten() bytes with no offset.

Specified by:

getData in class ByteStore

Returns:

A byte array containing the data from the byte store.

Throws:

java.io.IOException

reset

public void reset()
           throws java.io.IOException

Description copied from class: ByteStore

Reset all pointers.

Specified by:

reset in class ByteStore

Throws:

java.io.IOException