org.apache.activemq.console.command.store.tar
Class TarOutputStream

java.lang.Object
  extended by java.io.OutputStream
      extended by java.io.FilterOutputStream
          extended by org.apache.activemq.console.command.store.tar.TarOutputStream
All Implemented Interfaces:
Closeable, Flushable

public class TarOutputStream
extends FilterOutputStream

The TarOutputStream writes a UNIX tar archive as an OutputStream. Methods are provided to put entries, and then write their contents by writing to this stream using write().


Field Summary
protected  byte[] assemBuf
           
protected  int assemLen
           
protected  TarBuffer buffer
           
protected  long currBytes
           
protected  String currName
           
protected  long currSize
           
protected  boolean debug
           
static int LONGFILE_ERROR
          Fail if a long file name is required in the archive.
static int LONGFILE_GNU
          GNU tar extensions are used to store long file names in the archive.
static int LONGFILE_TRUNCATE
          Long paths will be truncated in the archive.
protected  int longFileMode
           
protected  byte[] oneBuf
           
protected  byte[] recordBuf
           
 
Fields inherited from class java.io.FilterOutputStream
out
 
Constructor Summary
TarOutputStream(OutputStream os)
          Constructor for TarInputStream.
TarOutputStream(OutputStream os, int blockSize)
          Constructor for TarInputStream.
TarOutputStream(OutputStream os, int blockSize, int recordSize)
          Constructor for TarInputStream.
 
Method Summary
 void close()
          Ends the TAR archive and closes the underlying OutputStream.
 void closeEntry()
          Close an entry.
 void finish()
          Ends the TAR archive without closing the underlying OutputStream.
 int getRecordSize()
          Get the record size being used by this stream's TarBuffer.
 void putNextEntry(TarEntry entry)
          Put an entry on the output stream.
 void setBufferDebug(boolean debug)
          Sets the debugging flag in this stream's TarBuffer.
 void setDebug(boolean debugF)
          Sets the debugging flag.
 void setLongFileMode(int longFileMode)
          Set the long file mode.
 void write(byte[] wBuf)
          Writes bytes to the current tar archive entry.
 void write(byte[] wBuf, int wOffset, int numToWrite)
          Writes bytes to the current tar archive entry.
 void write(int b)
          Writes a byte to the current tar archive entry.
 
Methods inherited from class java.io.FilterOutputStream
flush
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

LONGFILE_ERROR

public static final int LONGFILE_ERROR
Fail if a long file name is required in the archive.

See Also:
Constant Field Values

LONGFILE_TRUNCATE

public static final int LONGFILE_TRUNCATE
Long paths will be truncated in the archive.

See Also:
Constant Field Values

LONGFILE_GNU

public static final int LONGFILE_GNU
GNU tar extensions are used to store long file names in the archive.

See Also:
Constant Field Values

debug

protected boolean debug

currSize

protected long currSize

currName

protected String currName

currBytes

protected long currBytes

oneBuf

protected byte[] oneBuf

recordBuf

protected byte[] recordBuf

assemLen

protected int assemLen

assemBuf

protected byte[] assemBuf

buffer

protected TarBuffer buffer

longFileMode

protected int longFileMode
Constructor Detail

TarOutputStream

public TarOutputStream(OutputStream os)
Constructor for TarInputStream.

Parameters:
os - the output stream to use

TarOutputStream

public TarOutputStream(OutputStream os,
                       int blockSize)
Constructor for TarInputStream.

Parameters:
os - the output stream to use
blockSize - the block size to use

TarOutputStream

public TarOutputStream(OutputStream os,
                       int blockSize,
                       int recordSize)
Constructor for TarInputStream.

Parameters:
os - the output stream to use
blockSize - the block size to use
recordSize - the record size to use
Method Detail

setLongFileMode

public void setLongFileMode(int longFileMode)
Set the long file mode. This can be LONGFILE_ERROR(0), LONGFILE_TRUNCATE(1) or LONGFILE_GNU(2). This specifies the treatment of long file names (names >= TarConstants.NAMELEN). Default is LONGFILE_ERROR.

Parameters:
longFileMode - the mode to use

setDebug

public void setDebug(boolean debugF)
Sets the debugging flag.

Parameters:
debugF - True to turn on debugging.

setBufferDebug

public void setBufferDebug(boolean debug)
Sets the debugging flag in this stream's TarBuffer.

Parameters:
debug - True to turn on debugging.

finish

public void finish()
            throws IOException
Ends the TAR archive without closing the underlying OutputStream. The result is that the two EOF records of nulls are written.

Throws:
IOException - on error

close

public void close()
           throws IOException
Ends the TAR archive and closes the underlying OutputStream. This means that finish() is called followed by calling the TarBuffer's close().

Specified by:
close in interface Closeable
Overrides:
close in class FilterOutputStream
Throws:
IOException - on error

getRecordSize

public int getRecordSize()
Get the record size being used by this stream's TarBuffer.

Returns:
The TarBuffer record size.

putNextEntry

public void putNextEntry(TarEntry entry)
                  throws IOException
Put an entry on the output stream. This writes the entry's header record and positions the output stream for writing the contents of the entry. Once this method is called, the stream is ready for calls to write() to write the entry's contents. Once the contents are written, closeEntry() MUST be called to ensure that all buffered data is completely written to the output stream.

Parameters:
entry - The TarEntry to be written to the archive.
Throws:
IOException - on error

closeEntry

public void closeEntry()
                throws IOException
Close an entry. This method MUST be called for all file entries that contain data. The reason is that we must buffer data written to the stream in order to satisfy the buffer's record based writes. Thus, there may be data fragments still being assembled that must be written to the output stream before this entry is closed and the next entry written.

Throws:
IOException - on error

write

public void write(int b)
           throws IOException
Writes a byte to the current tar archive entry. This method simply calls read( byte[], int, int ).

Overrides:
write in class FilterOutputStream
Parameters:
b - The byte written.
Throws:
IOException - on error

write

public void write(byte[] wBuf)
           throws IOException
Writes bytes to the current tar archive entry. This method simply calls write( byte[], int, int ).

Overrides:
write in class FilterOutputStream
Parameters:
wBuf - The buffer to write to the archive.
Throws:
IOException - on error

write

public void write(byte[] wBuf,
                  int wOffset,
                  int numToWrite)
           throws IOException
Writes bytes to the current tar archive entry. This method is aware of the current entry and will throw an exception if you attempt to write bytes past the length specified for the current entry. The method is also (painfully) aware of the record buffering required by TarBuffer, and manages buffers that are not a multiple of recordsize in length, including assembling records from small buffers.

Overrides:
write in class FilterOutputStream
Parameters:
wBuf - The buffer to write to the archive.
wOffset - The offset in the buffer from which to get bytes.
numToWrite - The number of bytes to write.
Throws:
IOException - on error


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