List of usage examples for javax.naming StringRefAddr getContent
public Object getContent()
From source file:org.pepstock.jem.jppf.ExecuteManager.java
/** * Create a JPPF job that can be submitted for execution. * //from w w w . j av a 2 s. c o m * @param runnable Class name of Runnable or JPPFTask to execute * @param parallelTaskNumber Number of parallel task to submit * @param xmlContext InitialContext, serialized in XML string * @return an instance of the {@link org.jppf.client.JPPFJob JPPFJob} class. * @throws NamingException * @throws IOException * @throws JPPFException * @throws JPFFException * if an error occurs while creating the job or adding tasks. */ private static JPPFJob createJob(String xmlContext) throws JPPFMessageException, NamingException, IOException, JPPFException { XStream xstream = new XStream(); // reads all properties String jobName = JPPFConfiguration.getProperties().getProperty(Keys.JEM_JOB_NAME); String taskName = JPPFConfiguration.getProperties().getProperty(Keys.JEM_TASK_NAME); String runnable = JPPFConfiguration.getProperties().getProperty(Keys.JEM_RUNNABLE); int parallelTaskNumber = JPPFConfiguration.getProperties().getInt(Keys.JEM_TASK_NUMBER); // creates a data provider to pass initial context and number of parallel task MemoryMapDataProvider provider = new MemoryMapDataProvider(); provider.setValue(Keys.JEM_CONTEXT, xmlContext); provider.setValue(Keys.JEM_TASK_NUMBER, String.valueOf(parallelTaskNumber)); // checks if CHUNK is set if (JPPFConfiguration.getProperties().containsKey(Keys.JEM_CHUNKABLE_DATA_DESCRIPTION)) { // gets data description String dataDescription = JPPFConfiguration.getProperties() .getProperty(Keys.JEM_CHUNKABLE_DATA_DESCRIPTION); File file = null; InitialContext ic = ContextUtils.getContext(); // lookup for JNDI reference // needs file name because chunk is based on RandomFileAccess // that wants a FILE and not inputstream // so gets data description implementation object // to get REAL FILE NamingEnumeration<NameClassPair> list = ic.list(dataDescription); while (list.hasMore()) { NameClassPair pair = list.next(); // checks if is datastream // only datastreams are searched if (pair.getName().equalsIgnoreCase(dataDescription) && pair instanceof DataStreamNameClassPair) { DataStreamNameClassPair dsPair = (DataStreamNameClassPair) pair; DataStreamReference prevReference = (DataStreamReference) dsPair.getObject(); // gets data description XML definition StringRefAddr sra = (StringRefAddr) prevReference.get(StringRefAddrKeys.DATASTREAMS_KEY); // creates datadescription implementatio to get file DataDescriptionImpl ddImpl = (DataDescriptionImpl) xstream.fromXML(sra.getContent().toString()); file = ddImpl.getDatasets().iterator().next().getRealFile(); // leaves while break; } } // if file is null // data description is not found if (file == null) { throw new JPPFMessageException(JPPFMessage.JEMJ019E, dataDescription); } // calculated buffersize long bufferSize = file.length() / parallelTaskNumber; // using delimiter, creates chunk list List<ChunkDefinition> chunks = null; String delimiter = JPPFConfiguration.getProperties().getProperty(Keys.JEM_DELIMITER); String delimiterString = JPPFConfiguration.getProperties().getProperty(Keys.JEM_DELIMITER_STRING); if (delimiter != null) { // delimiter default LF char splitter = CharUtils.LF; // if delimiter is defined in BYTE mode // calculate char if (delimiter.toLowerCase().startsWith("0x")) { delimiter = StringUtils.substringAfter(delimiter.toLowerCase(), "0x"); splitter = (char) Integer.parseInt(delimiter, 16); } else { // if uses a escape java char splitter = StringEscapeUtils.unescapeJava(delimiter).charAt(0); } String displayDelimiter = Integer.toHexString((byte) splitter) + "(" + splitter + ")"; LogAppl.getInstance().emit(JPPFMessage.JEMJ020I, displayDelimiter); // calculates chunks chunks = ChunksFactory.getChunksByDelimiter(file, bufferSize, splitter); provider.setValue(Keys.JEM_DELIMITER, splitter); } else if (delimiterString != null) { LogAppl.getInstance().emit(JPPFMessage.JEMJ020I, delimiterString); // calculates chunks chunks = ChunksFactory.getChunksByDelimiter(file, bufferSize, delimiterString); provider.setValue(Keys.JEM_DELIMITER, delimiterString); } else { // if delimiter and delimiterString are missing, uses default delimiter (System.getProperty("line.separator") chunks = ChunksFactory.getChunksByDelimiter(file, bufferSize); } // changes parallel task // because chunk calculation tries to maintain the same // number of task but usually there are less after // chunk list creation parallelTaskNumber = chunks.size(); LogAppl.getInstance().emit(JPPFMessage.JEMJ021I, chunks); // serializes and saves on data provider all necessary data provider.setValue(Keys.JEM_TASK_NUMBER, String.valueOf(parallelTaskNumber)); provider.setValue(Keys.JEM_CHUNKABLE_DATA_DESCRIPTION, dataDescription); provider.setValue(Keys.JEM_CHUNKS, xstream.toXML(chunks)); } LogAppl.getInstance().emit(JPPFMessage.JEMJ023I, parallelTaskNumber); // checks if merged data decritpion is an argument if (JPPFConfiguration.getProperties().containsKey(Keys.JEM_MERGED_DATA_DESCRIPTION)) { // loads a list with all temporary files for tasks // to use to write partial output for (int i = 0; i < parallelTaskNumber; i++) { File temp = File.createTempFile("task[" + i + "]-merge", ".jemjppf"); temp.deleteOnExit(); TEMPORARY_FILES.add(temp); LogAppl.getInstance().emit(JPPFMessage.JEMJ022I, temp.getAbsolutePath(), i); } // sets data provider provider.setValue(Keys.JEM_MERGED_DATA_DESCRIPTION, JPPFConfiguration.getProperties().getProperty(Keys.JEM_MERGED_DATA_DESCRIPTION)); provider.setValue(Keys.JEM_TEMPORARY_FILES, xstream.toXML(TEMPORARY_FILES)); } // create a JPPF job JPPFJob job = new JPPFJob(provider); // give this job a readable unique id that we can use to monitor and // manage it. job.setName(jobName + "." + taskName); // Checks what instance has been past to distribute on grid try { Object clazz = Class.forName(runnable).newInstance(); if (clazz instanceof JPPFTask) { for (int i = 0; i < parallelTaskNumber; i++) { JPPFTask t = new WrapperJPPFTask((JPPFTask) clazz); // add a task to the job. job.addTask(t); } } else if (clazz instanceof Runnable) { for (int i = 0; i < parallelTaskNumber; i++) { JPPFTask t = new RunnableTask((Runnable) clazz); // add a task to the job. job.addTask(t); } } else { throw new JPPFMessageException(JPPFMessage.JEMJ002E, runnable, Runnable.class.getName(), JPPFTask.class.getName()); } } catch (InstantiationException e) { throw new JPPFMessageException(JPPFMessage.JEMJ002E, e, runnable, Runnable.class.getName(), JPPFTask.class.getName()); } catch (IllegalAccessException e) { throw new JPPFMessageException(JPPFMessage.JEMJ002E, e, runnable, Runnable.class.getName(), JPPFTask.class.getName()); } catch (ClassNotFoundException e) { throw new JPPFMessageException(JPPFMessage.JEMJ002E, e, runnable, Runnable.class.getName(), JPPFTask.class.getName()); } // there is no guarantee on the order of execution of the tasks, // however the results are guaranteed to be returned in the same order // as the tasks. return job; }