Examples of java.util.zip.Deflater

java.util.zip.Deflater
de a String into bytes String inputString = "blahblahblah\u20AC\u20AC"; byte[] input = inputString.getBytes("UTF-8"); // Compress the bytes byte[] output = new byte[100]; Deflater compresser = new Deflater(); compresser.setInput(input); compresser.finish(); int compressedDataLength = compresser.deflate(output); // Decompress the bytes Inflater decompresser = new Inflater(); decompresser.setInput(output, 0, compressedDataLength); byte[] result = new byte[100]; int resultLength = decompresser.inflate(result); decompresser.end(); // Decode the bytes into a String String outputString = new String(result, 0, resultLength, "UTF-8"); } catch(java.io.UnsupportedEncodingException ex) { // handle } catch (java.util.zip.DataFormatException ex) { // handle } @see Inflater @version 1.45, 04/07/06 @author David Connelly

            Message msg=(Message)evt.getArg();
            int length=msg.getLength(); // takes offset/length (if set) into account
            if(length >= min_size) {
                byte[] payload=msg.getRawBuffer(); // here we get the ref so we can avoid copying
                byte[] compressed_payload=new byte[length];
                Deflater deflater=null;
                try {
                    deflater=deflater_pool.take();
                    deflater.reset();
                    deflater.setInput(payload, msg.getOffset(), length);
                    deflater.finish();
                    deflater.deflate(compressed_payload);
                    int compressed_size=deflater.getTotalOut();


                    if(compressed_size < length ) { // JGRP-1000
                        byte[] new_payload=new byte[compressed_size];
                        System.arraycopy(compressed_payload,0,new_payload,0,compressed_size);
                        Message copy=msg.copy(false).setBuffer(new_payload).putHeader(this.id,new CompressHeader(length));

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    public void init() throws Exception {
        deflater_pool=new ArrayBlockingQueue<Deflater>(pool_size);
        for(int i=0; i < pool_size; i++) {
            deflater_pool.add(new Deflater(compression_level));
        }
        inflater_pool=new ArrayBlockingQueue<Inflater>(pool_size);
        for(int i=0; i < pool_size; i++) {
            inflater_pool.add(new Inflater());
        }

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            int length=msg.getLength(); // takes offset/length (if set) into account
            if(length >= min_size) {
                byte[] payload=msg.getRawBuffer(); // here we get the ref so we can avoid copying
                byte[] compressed_payload=new byte[length];
                int compressed_size;
                Deflater deflater=null;
                try {
                    deflater=deflater_pool.take();
                    deflater.reset();
                    deflater.setInput(payload, msg.getOffset(), length);
                    deflater.finish();
                    deflater.deflate(compressed_payload);
                    compressed_size=deflater.getTotalOut();
                    byte[] new_payload=new byte[compressed_size];
                    System.arraycopy(compressed_payload, 0, new_payload, 0, compressed_size);
                    msg.setBuffer(new_payload);
                    msg.putHeader(name, new CompressHeader(length));
                    if(log.isTraceEnabled())

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    public void init() throws Exception {
        deflater_pool=new ArrayBlockingQueue<Deflater>(pool_size);
        for(int i=0; i < pool_size; i++) {
            deflater_pool.add(new Deflater(compression_level));
        }
        inflater_pool=new ArrayBlockingQueue<Inflater>(pool_size);
        for(int i=0; i < pool_size; i++) {
            inflater_pool.add(new Inflater());
        }

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            int length=msg.getLength(); // takes offset/length (if set) into account
            if(length >= min_size) {
                byte[] payload=msg.getRawBuffer(); // here we get the ref so we can avoid copying
                byte[] compressed_payload=new byte[length];
                int compressed_size;
                Deflater deflater=null;
                try {
                    deflater=deflater_pool.take();
                    deflater.reset();
                    deflater.setInput(payload, msg.getOffset(), length);
                    deflater.finish();
                    deflater.deflate(compressed_payload);
                    compressed_size=deflater.getTotalOut();


                    if ( compressed_size < length ) { // JGRP-1000
                        byte[] new_payload=new byte[compressed_size];
                        System.arraycopy(compressed_payload, 0, new_payload, 0, compressed_size);
                        msg.setBuffer(new_payload);

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    public void init() throws Exception {
        deflater_pool=new ArrayBlockingQueue<Deflater>(pool_size);
        for(int i=0; i < pool_size; i++) {
            deflater_pool.add(new Deflater(compression_level));
        }
        inflater_pool=new ArrayBlockingQueue<Inflater>(pool_size);
        for(int i=0; i < pool_size; i++) {
            inflater_pool.add(new Inflater());
        }

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   *
   * @throws IOException 
   */
  private void collectAndZip() throws IOException {
    ByteArrayOutputStream baosZipped = new ByteArrayOutputStream(4096);
    Deflater deflater = new Deflater(compressLevel.lvl, true);
    deflater.setStrategy(compressStrategy.strat);
    int nbrEntries = 0;
    
    List<Integer> idxAndLen = new ArrayList<Integer>();


    for (int i = 0; i < baosZipSources.length; i++) {
      ByteArrayOutputStream baos = baosZipSources[i];
      if (baos != null) {
        nbrEntries ++;
        dosZipSources[i].close();
        long startTime = System.currentTimeMillis();
        int zipBufSize = Math.max(1024, baos.size() / 100);
        deflater.reset();
        DeflaterOutputStream cds = new DeflaterOutputStream(baosZipped, deflater, zipBufSize);       
        baos.writeTo(cds);
        cds.close();
        idxAndLen.add(i);
        if (doMeasurements) {
          idxAndLen.add((int)(sm.statDetails[i].afterZip = deflater.getBytesWritten()));            
          idxAndLen.add((int)(sm.statDetails[i].beforeZip = deflater.getBytesRead()));
          sm.statDetails[i].zipTime = System.currentTimeMillis() - startTime;
        } else {
          idxAndLen.add((int)deflater.getBytesWritten());            
          idxAndLen.add((int)deflater.getBytesRead());
        }
      } 
    }
    serializedOut.writeInt(nbrEntries);                     // write number of entries
    for (int i = 0; i < idxAndLen.size();) {

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     *
     * @throws IOException 
     */
    private void collectAndZip() throws IOException {
      ByteArrayOutputStream baosZipped = new ByteArrayOutputStream(4096);
      Deflater deflater = new Deflater(compressLevel.lvl, true);
      deflater.setStrategy(compressStrategy.strat);
      int nbrEntries = 0;
      
      List<Integer> idxAndLen = new ArrayList<Integer>();


      for (int i = 0; i < baosZipSources.length; i++) {
        ByteArrayOutputStream baos = baosZipSources[i];
        if (baos != null) {
          nbrEntries ++;
          dosZipSources[i].close();
          long startTime = System.currentTimeMillis();
          int zipBufSize = Math.max(1024, baos.size() / 100);
          deflater.reset();
          DeflaterOutputStream cds = new DeflaterOutputStream(baosZipped, deflater, zipBufSize);       
          baos.writeTo(cds);
          cds.close();
          idxAndLen.add(i);
          if (doMeasurement) {
            idxAndLen.add((int)(sm.statDetails[i].afterZip = deflater.getBytesWritten()));            
            idxAndLen.add((int)(sm.statDetails[i].beforeZip = deflater.getBytesRead()));
            sm.statDetails[i].zipTime = System.currentTimeMillis() - startTime;
          } else {
            idxAndLen.add((int)deflater.getBytesWritten());            
            idxAndLen.add((int)deflater.getBytesRead());
          }
        } 
      }
      serializedOut.writeInt(nbrEntries);                     // write number of entries
      for (int i = 0; i < idxAndLen.size();) {

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    out.seek(packEnd);
    out.write(buf, 0, len);
    packEnd += len;


    if (def == null)
      def = new Deflater(Deflater.DEFAULT_COMPRESSION, false);
    else
      def.reset();
    def.setInput(data);
    def.finish();

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      writeObjectImpl(out, base);
  }


  private void writeWholeObjectDeflate(PackOutputStream out,
      final ObjectToPack otp) throws IOException {
    final Deflater deflater = deflater();
    final ObjectLoader ldr = reader.open(otp, otp.getType());


    out.resetCRC32();
    otp.setOffset(out.length());
    out.writeHeader(otp, ldr.getSize());


    deflater.reset();
    DeflaterOutputStream dst = new DeflaterOutputStream(out, deflater);
    ldr.copyTo(dst);
    dst.finish();
  }

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