private void secondChance(RRObject obj) throws ClassNotFoundException, IOException { try { obj.runProtocol(_srv, _ois, _oos); } catch (PDBatchTaskExecutorException e2) { utils.Messenger.getInstance() .msg( "PDBTEC2ListenerThread.run(): sending NoWorkerAvailableResponse() to client...", 1); // e.printStackTrace(); _oos.writeObject(new NoWorkerAvailableResponse(((TaskObjectsExecutionRequest) obj)._tasks)); _oos.flush(); } catch (IOException e2) { utils.Messenger.getInstance() .msg("PDBTEC2ListenerThread.run(): sending FailedReply to client...", 1); // e.printStackTrace(); _oos.writeObject(new FailedReply()); _oos.flush(); } }
/** * reads from the input stream the initialization command sent to it, sends back to the client * an <CODE>OKReply</CODE> "ACK" msg, and then enters an infinite loop waiting to read from the * input stream an <CODE>RRObject</CODE> obj that should really be of type <CODE> * TaskObjectsExecutionRequest</CODE>, on which it executes its method <CODE> * obj.runProtocol(_srv,_ois, _oos)</CODE>. */ public void run() { // first, read from socket the worker-initialization object that will // be broadcast for execution to every worker connecting to this server. utils.Messenger mger = utils.Messenger.getInstance(); try { mger.msg("PDBTEC2ListenerThread: waiting to read the init_cmd from client", 1); RRObject initCmd = (RRObject) _ois.readObject(); mger.msg("PDBTEC2ListenerThread: done reading the init_cmd from client", 1); setInitCmd(initCmd); mger.msg("PDBTEC2ListenerThread: done setting the init_cmd", 2); // send back to the clt an "ACK" message _oos.writeObject(new OKReply()); _oos.flush(); mger.msg("PDBTEC2ListenerThread: done sending OKReply through the socket", MIN_PRIORITY); } catch (Exception e) { // client closed connection // e.printStackTrace(); try { _ois.close(); _oos.close(); _s.close(); } catch (Exception e2) { // e2.printStackTrace(); } mger.msg("PDBTEC2ListenerThread: Client Network Connection Closed", 0); System.exit(-1); } while (true) { try { mger.msg("PDBTEC2ListenerThread.run(): waiting to read an RRObject...", 2); // 1. read from socket input RRObject obj = (RRObject) _ois.readObject(); // obj is an TaskObjectsExecutionRequest mger.msg("PDBTEC2ListenerThread.run(): RRObject read", 2); // 2. take appropriate action try { obj.runProtocol(_srv, _ois, _oos); } catch (PDBatchTaskExecutorException e) { mger.msg( "PDBTEC2ListenerThread.run(): calling obj.runProtocol() " + "issued PDBatchTaskExecutorException, will try one more time.", 1); secondChance(obj); } catch ( IOException e) { // worker somehow failed, give srv one more shot, then notify client mger.msg( "PDBTEC2ListenerThread.run(): calling obj.runProtocol() " + "issued IOException, will try one more time.", 1); secondChance(obj); } } catch (Exception e) { // client closed connection // e.printStackTrace(); try { _ois.close(); _oos.close(); _s.close(); } catch (Exception e2) { // e2.printStackTrace(); } mger.msg( "PDBTExecSingleCltWrkInitSrv: Client Network Connection Closed " + "(exception '" + e + "' caught)", 0); System.exit(-1); } } }