Examples of com.sun.enterprise.admin.common.ByteChunk

com.sun.enterprise.admin.common.ByteChunk
A Class that represents a Chunk of Bytes. This is designed to be used to transfer bytes of data between remote entities. There are some properties of the class that will allow users of this class to take specific actions. Maximum size of the chunk is 64 KBytes. Needs to be Serializable, for ByteChunks may transmit over wire.
Chunks are generally parts of file identified by a name. Note that this class is modeled to be immutable.
@author Kedar Mhaswade @version 1.0

        {
            String msg = localStrings.getString( "admin.mbeans.ssmb.call_preparedownload_first" );
            throw new MBeanException( new java.lang.IllegalStateException( msg ) );
        }
        // if it is a file of 0, return null bytes
        ByteChunk           byteChunk   = null;
        if (downloadInfo.downloadFile.length() == 0 ) {
            byte[] bytes = new byte[ByteChunk.kChunkMinSize];
            byteChunk = new ByteChunk(bytes, 
                             downloadInfo.downloadFile.getAbsolutePath(), 
                             true, true);
            unlockAndReset();
            return byteChunk;
        }


        if ((chunkIndex >= downloadInfo.numChunks) || (chunkIndex < 0))
        {
            String msg = localStrings.getString( "admin.mbeans.ssmb.invalid_chunk_index" );
            unlockAndReset();
            throw new MBeanException( new java.lang.IllegalStateException( msg ) );
        }
        RandomAccessFile    raf         = null;
        try
        {
            raf = new RandomAccessFile(downloadInfo.downloadFile, "r");
            byte[] bytes = new byte[ByteChunk.kChunkMaxSize];
            raf.seek(downloadInfo.numBytesRead);
            int actualBytesRead = raf.read(bytes, 0, ByteChunk.kChunkMaxSize);
            /*
            Debug.println("Read " + actualBytesRead + " from " + 
                          downloadInfo.numBytesRead);
            */
            if (actualBytesRead < bytes.length)
            {
                byte[] newBytes = new byte[actualBytesRead];
                System.arraycopy(bytes, 0, newBytes, 0, newBytes.length);
                bytes = newBytes;
            }
            downloadInfo.numBytesRead += actualBytesRead;
            boolean isFirstChunk    = (chunkIndex == 0);
            boolean isLastChunk     = 
                (chunkIndex == (downloadInfo.numChunks - 1));
            sLogger.log(Level.FINEST, "chunkIndex = " + chunkIndex + 
                          " isFirstChunk = " + isFirstChunk + 
                          " isLastChunk = " + isLastChunk);
            byteChunk = new ByteChunk(bytes, 
                             downloadInfo.downloadFile.getAbsolutePath(), 
                             isFirstChunk, isLastChunk);
        }
        catch (IOException ioe)
        {
            sLogger.log(Level.FINE, "mbean.download_failed", ioe);
            unlockAndReset();
            throw new MBeanException(ioe);
        }
        finally
        {
            if (raf != null)
            {
                try { raf.close(); }
                catch (IOException ioe) {}
            }
            if ((byteChunk != null) && (byteChunk.isLast()))
            {
                unlockAndReset();
            }
        }
        return byteChunk;

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        // download file
        File targetFile = new File(info.getDownloadFilePath());


        // if it is a file of 0, return null bytes
        ByteChunk byteChunk  = null;
        if (targetFile.length() == 0) 
        {
            byte[] bytes = new byte[ByteChunk.kChunkMinSize];
            String fPath = info.getDownloadFilePath();
            byteChunk = new ByteChunk(bytes, fPath, true, true, fPath, 0);
            info.setChunk(byteChunk);


            return info;
        }


        // verifies that chunk index is valid
        if ( (info.getChunkIndex() >= info.getNumberOfChunks()) 
                || (info.getChunkIndex() < 0) )
        {
            String msg = localStrings.getString(
                "admin.mbeans.ssmb.invalid_chunk_index" );
            throw new MBeanException(new java.lang.IllegalStateException(msg));
        }


        // reads the chunk into a byte chunk object
        RandomAccessFile raf = null;
        try
        {
            raf = new RandomAccessFile(targetFile, "r");
            byte[] bytes = new byte[ByteChunk.kChunkMaxSize];
            raf.seek(info.getNumberOfBytesSent());


            int actualBytesRead = raf.read(bytes, 0, ByteChunk.kChunkMaxSize);
            if (actualBytesRead < bytes.length)
            {
                byte[] newBytes = new byte[actualBytesRead];
                System.arraycopy(bytes, 0, newBytes, 0, newBytes.length);
                bytes = newBytes;
            }


            // increments the counter
            info.incrementNumberOfBytesSent(bytes.length);


            String path = info.getDownloadFilePath();
            byteChunk = new ByteChunk(bytes, 
                             path, info.isFirstChunk(), info.isLastChunk(),
                             path, targetFile.length());
        }
        catch (IOException ioe)
        {

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        {
      String msg = localStrings.getString( "admin.server.core.mbean.config.invalid_chunk_index" );
            throw new ControlException( msg );
    }
        RandomAccessFile    raf         = null;
        ByteChunk           byteChunk   = null;
        try
        {
            raf = new RandomAccessFile(downloadInfo.downloadFile, "r");
            byte[] bytes = new byte[ByteChunk.kChunkMaxSize];
            raf.seek(downloadInfo.numBytesRead);
            int actualBytesRead = raf.read(bytes, 0, ByteChunk.kChunkMaxSize);
            /*
            Debug.println("Read " + actualBytesRead + " from " + 
                          downloadInfo.numBytesRead);
            */
            if (actualBytesRead < bytes.length)
            {
                byte[] newBytes = new byte[actualBytesRead];
                for (int i = 0; i < newBytes.length; i++)
                {
                    newBytes[i] = bytes[i];
                }
                bytes = newBytes;
            }
            downloadInfo.numBytesRead += actualBytesRead;
            boolean isFirstChunk    = (chunkIndex == 0);
            boolean isLastChunk     = 
                (chunkIndex == (downloadInfo.numChunks - 1));
            sLogger.log(Level.FINEST, "chunkIndex = " + chunkIndex + 
                          " isFirstChunk = " + isFirstChunk + 
                          " isLastChunk = " + isLastChunk);
            byteChunk = new ByteChunk(bytes, 
                             downloadInfo.downloadFile.getAbsolutePath(), 
                             isFirstChunk, isLastChunk);
        }
        catch (Exception ioe)
        {
            sLogger.log(Level.FINE, "mbean.download_failed", ioe);
            downloadInfo.reset();
            try
            {
                lock.release();
            }
            catch (Exception e)
            {
                sLogger.log(Level.FINEST, "lock could not be released");
            }
            throw new ControlException(ioe.toString());
        }
        finally
        {
            if (raf != null)
            {
                try { raf.close(); }
                catch (IOException ioe) {}
            }
            if ((byteChunk != null) && (byteChunk.isLast()))
            {
                try
                {
                    downloadInfo.reset();
                    lock.release();

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Related Classes of com.sun.enterprise.admin.common.ByteChunk

com.sun.enterprise.admin.mbeans.SystemServicesMBean

com.sun.enterprise.admin.server.core.mbean.config.ServerController

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