Examples of jj2000.j2k.util.ThreadPool

Package jj2000.j2k.util

Examples of jj2000.j2k.util.ThreadPool

jj2000.j2k.encoder.Encoder
This class implements a thread pool. The thread pool contains a set of threads which can be given work to do.
If the Java Virtual Machine (JVM) uses native threads, then the different threads will be able to execute in different processors in parallel on multiprocessors machines. However, under some JVMs and operating systems using native threads is not sufficient to allow the JVM access to multiple processors. This is the case when native threads are implemented using POSIX threads on lightweight processes (i.e. PTHREAD_SCOPE_PROCESS sopce scheduling), which is the case on most UNIX operating systems. In order to do provide access to multiple processors it is necessary to set the concurrency level to the number of processors or slightly higher. This can be achieved by setting the Java system property with the name defined by CONCURRENCY_PROP_NAME to some non-negative number. This will make use of the 'NativeServices' class and supporting native libraries. See 'NativeServices' for details. See 'CONCURRENCY_PROP_NAME' for the name of the property.
Initially the thread pool contains a user specified number of idle threads. Idle threads can be given a target which is run. While running the target the thread temporarily leaves the idle list. When the target finishes, it joins the idle list again, waiting for a new target. When a target is finished a thread can be notified on a particular object that is given as a lock.
Jobs can be submitted using Runnable interfaces, using the 'runTarget()' methods. When the job is submitted, an idle thread will be obtained, the 'run()' method of the 'Runnable' interface will be executed and when it completes the thread will be returned to the idle list. In general the 'run()' method should complete in a rather short time, so that the threds of the pool are not starved.
If using the non-asynchronous calls to 'runTarget()', it is important that any target's 'run()' method, or any method called from it, does not use non-asynchronous calls to 'runTarget()' on the same thread pool where it was started. Otherwise this could create a dead-lock when there are not enough idle threads.
The pool also has a global error and runtime exception condition (one for 'Error' and one for 'RuntimeException'). If a target's 'run()' method throws an 'Error' or 'RuntimeException' the corresponding exception condition is set and the exception object saved. In any subsequent call to 'checkTargetErrors()' the saved exception object is thrown. Likewise, if a target's 'run()' method throws any other subclass of 'Throwable' a new 'RuntimeException' is created and saved. It will be thrown on a subsequent call to 'checkTargetErrors()'. If more than one exception occurs between calls to 'checkTargetErrors()' only the last one is saved. Any 'Error' condition has precedence on all 'RuntimeException' conditions. The threads in the pool are unaffected by any exceptions thrown by targets.
The only exception to the above is the 'ThreadDeath' exception. If a target's 'run()' method throws the 'ThreadDeath' exception a warning message is printed and the exception is propagated, which will terminate the thread in which it occurs. This could lead to instabilities of the pool. The 'ThreadDeath' exception should never be thrown by the program. It is thrown by the Java(TM) Virtual Machine when Thread.stop() is called. This method is deprecated and should never be called.
All the threads in the pool are "daemon" threads and will automatically terminate when no daemon threads are running. @see NativeServices @see #CONCURRENCY_PROP_NAME @see Runnable @see Thread @see Error @see RuntimeException

        this.sptServiceFactory = sptServiceFactory;
    }


  @Override
  public void setSPTVisitor(SPTVisitor vis) {
    throw new NotImplementedError();
  }

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        return newPath;
    }


  @Override
  public void setSPTVisitor(SPTVisitor vis) {
    throw new NotImplementedError();
  }

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        return spt.getPaths();
    }


  @Override
  public void setSPTVisitor(SPTVisitor vis) {
    throw new NotImplementedError();
  }

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     * 
     * @param configuration
     * @throws Exception
     */
    public boolean startEmbeddedBroker(Properties configuration) throws Exception {
        throw new NotImplementedError("This functionality is not implemented");
    }

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     * Stops the embedded broker
     * 
     * @throws Exception
     */
    public boolean stopEmbeddedBroker() throws Exception {
        throw new NotImplementedError("This functionality is not implemented");
    }

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                        }


                        @Override
                        public Object unmarshal(HierarchicalStreamReader reader,
                                UnmarshallingContext context) {
                            throw new NotImplementedError("Not implemented");
                        }


                    });
            }


            @Override
            public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
                throw new NotImplementedError("Not implemented");
            }


        });
        xs.alias("resource", ManifestModel.class);
        xs.addImplicitCollection(ManifestModel.class, "entries");

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        // Rely on rate allocator to limit amount of data
        File tmpFile = File.createTempFile("jiio-", ".tmp");
        tmpFile.deleteOnExit();


        // Creates CodestreamWriter
        FileCodestreamWriter bwriter =
            new FileCodestreamWriter(tmpFile, Integer.MAX_VALUE);


        // Creates the rate allocator
        float rate = (float)j2kwparam.getEncodingRate();
        PostCompRateAllocator ralloc =
            PostCompRateAllocator.createInstance(ecoder,
                                                 rate,
                                                 bwriter,
                                                 j2kwparam);


        // Instantiates the HeaderEncoder
        HeaderEncoder headenc =
            new HeaderEncoder(imgsrc, imsigned, dwt, imgtiler,
                              j2kwparam, rois,ralloc);


        ralloc.setHeaderEncoder(headenc);


        // Writes header to be able to estimate header overhead
        headenc.encodeMainHeader();


        //Initializes rate allocator, with proper header
        // overhead. This will also encode all the data
        try {
            ralloc.initialize();
        } catch (RuntimeException e) {
            if (WRITE_ABORTED.equals(e.getMessage())) {
                bwriter.close();
                tmpFile.delete();
                processWriteAborted();
                return;
            } else throw e;
        }


        // Write header (final)
        headenc.reset();
        headenc.encodeMainHeader();


        // Insert header into the codestream
        bwriter.commitBitstreamHeader(headenc);


        // Now do the rate-allocation and write result
        ralloc.runAndWrite();


        //Done for data encoding
        bwriter.close();


        // Calculate file length
        int fileLength = bwriter.getLength();


        // Tile-parts and packed packet headers
        int pktspertp = j2kwparam.getPacketPerTilePart();
        int ntiles = imgtiler.getNumTiles();
        if (pktspertp>0 || pphTile || pphMain){

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                                                 rate,
                                                 bwriter,
                                                 j2kwparam);


        // Instantiates the HeaderEncoder
        HeaderEncoder headenc =
            new HeaderEncoder(imgsrc, imsigned, dwt, imgtiler,
                              j2kwparam, rois,ralloc);


        ralloc.setHeaderEncoder(headenc);


        // Writes header to be able to estimate header overhead
        headenc.encodeMainHeader();


        //Initializes rate allocator, with proper header
        // overhead. This will also encode all the data
        try {
            ralloc.initialize();
        } catch (RuntimeException e) {
            if (WRITE_ABORTED.equals(e.getMessage())) {
                bwriter.close();
                tmpFile.delete();
                processWriteAborted();
                return;
            } else throw e;
        }


        // Write header (final)
        headenc.reset();
        headenc.encodeMainHeader();


        // Insert header into the codestream
        bwriter.commitBitstreamHeader(headenc);


        // Now do the rate-allocation and write result

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    pl.setProperty("i", inputFileName );
    param = pl.getParameter("i");
    
    
        showStatus("Initializing JJ2000 decoder...");
        dec = new Decoder(pl);
        showStatus("Decoding...");
        dec.run();
        outputFilesPaths = dec.getOutputFilesPaths();
        numComponents = dec.getNumComponents();
  }

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        {
          sb.append("-" + e.getKey() + " " + e.getValue() + " ");
        }
        
        
        dec = new Encoder(pl);
        showStatus("Encoding... parameters " + sb.toString());
        dec.run();
  }

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