List of usage examples for java.nio.channels SocketChannel read
public final long read(ByteBuffer[] dsts) throws IOException
From source file:com.app.services.ExecutorServiceThread.java
public void run() { // create a selector that will by used for multiplexing. The selector // registers the socketserverchannel as // well as all socketchannels that are created String CLIENTCHANNELNAME = "clientChannel"; String SERVERCHANNELNAME = "serverChannel"; String channelType = "channelType"; ConcurrentHashMap<SelectionKey, Object> resultMap = new ConcurrentHashMap<SelectionKey, Object>(); ClassLoader classLoader = null; ByteArrayOutputStream bstr;// w ww . java 2s . c om ByteBuffer buffer = null; ByteBuffer lengthBuffer = ByteBuffer.allocate(4); int bytesRead; InputStream bais; ObjectInputStream ois; Object object; ExecutorServiceInfo executorServiceInfo = null; Random random = new Random(System.currentTimeMillis()); // register the serversocketchannel with the selector. The OP_ACCEPT // option marks // a selection key as ready when the channel accepts a new connection. // When the // socket server accepts a connection this key is added to the list of // selected keys of the selector. // when asked for the selected keys, this key is returned and hence we // know that a new connection has been accepted. try { Selector selector = Selector.open(); SelectionKey socketServerSelectionKey = serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT); // SelectionKey socketServerSelectionKey1 = // channel.register(selector1, // SelectionKey.OP_ACCEPT); // set property in the key that identifies the channel Map<String, String> properties = new ConcurrentHashMap<String, String>(); properties.put(channelType, SERVERCHANNELNAME); socketServerSelectionKey.attach(properties); // wait for the selected keys SelectionKey key = null; Set<SelectionKey> selectedKeys; // logger.info("Instance Number"+instanceNumber); Iterator<SelectionKey> iterator = null; SocketChannel clientChannel = null; while (true) { try { // the select method is a blocking method which returns when // atleast // one of the registered // channel is selected. In this example, when the socket // accepts // a // new connection, this method // will return. Once a socketclient is added to the list of // registered channels, then this method // would also return when one of the clients has data to be // read // or // written. It is also possible to perform a nonblocking // select // using the selectNow() function. // We can also specify the maximum time for which a select // function // can be blocked using the select(long timeout) function. if (selector.select() >= 0) { selectedKeys = selector.selectedKeys(); iterator = selectedKeys.iterator(); } while (iterator.hasNext()) { try { key = iterator.next(); // the selection key could either by the // socketserver // informing // that a new connection has been made, or // a socket client that is ready for read/write // we use the properties object attached to the // channel // to // find // out the type of channel. if (((Map) key.attachment()).get(channelType).equals(SERVERCHANNELNAME)) { // a new connection has been obtained. This // channel // is // therefore a socket server. ServerSocketChannel serverSocketChannel = (ServerSocketChannel) key.channel(); // accept the new connection on the server // socket. // Since // the // server socket channel is marked as non // blocking // this channel will return null if no client is // connected. SocketChannel clientSocketChannel = serverSocketChannel.accept(); if (clientSocketChannel != null) { // set the client connection to be non // blocking clientSocketChannel.configureBlocking(false); SelectionKey clientKey = clientSocketChannel.register(selector, SelectionKey.OP_READ, SelectionKey.OP_WRITE); Map<String, String> clientproperties = new ConcurrentHashMap<String, String>(); clientproperties.put(channelType, CLIENTCHANNELNAME); clientKey.attach(clientproperties); clientKey.interestOps(SelectionKey.OP_READ); // clientSocketChannel.close(); // write something to the new created client /* * CharBuffer buffer = * CharBuffer.wrap("Hello client"); while * (buffer.hasRemaining()) { * clientSocketChannel.write * (Charset.defaultCharset() * .encode(buffer)); } * clientSocketChannel.close(); * buffer.clear(); */ } } else { // data is available for read // buffer for reading clientChannel = (SocketChannel) key.channel(); if (key.isReadable()) { // the channel is non blocking so keep it // open // till // the // count is >=0 clientChannel = (SocketChannel) key.channel(); if (resultMap.get(key) == null) { //log.info(key); bstr = new ByteArrayOutputStream(); object = null; clientChannel.read(lengthBuffer); int length = lengthBuffer.getInt(0); lengthBuffer.clear(); //log.info(length); buffer = ByteBuffer.allocate(length); if ((bytesRead = clientChannel.read(buffer)) > 0) { // buffer.flip(); // System.out // .println(bytesRead); bstr.write(buffer.array(), 0, bytesRead); buffer.clear(); } buffer.clear(); //log.info("Message1"+new String(bstr // .toByteArray())); bais = new ByteArrayInputStream(bstr.toByteArray()); ois = new ObjectInputStream(bais); // Offending // line. // Produces // the // StreamCorruptedException. //log.info("In read obect"); object = ois.readObject(); //log.info("Class Cast"); //log.info("Class Cast1"); ois.close(); byte[] params = bstr.toByteArray(); bstr.close(); //log.info("readObject"); //log.info("After readObject"); if (object instanceof CloseSocket) { resultMap.remove(key); clientChannel.close(); key.cancel(); } // clientChannel.close(); String serviceurl = (String) object; String[] serviceRegistry = serviceurl.split("/"); //log.info("classLoaderMap" // + urlClassLoaderMap); //log.info(deployDirectory // + "/" + serviceRegistry[0]); int servicenameIndex; //log.info(earServicesDirectory // + "/" + serviceRegistry[0] // + "/" + serviceRegistry[1]); if (serviceRegistry[0].endsWith(".ear")) { classLoader = (VFSClassLoader) urlClassLoaderMap.get(deployDirectory + "/" + serviceRegistry[0] + "/" + serviceRegistry[1]); servicenameIndex = 2; } else if (serviceRegistry[0].endsWith(".jar")) { classLoader = (WebClassLoader) urlClassLoaderMap .get(deployDirectory + "/" + serviceRegistry[0]); servicenameIndex = 1; } else { classLoader = (WebClassLoader) urlClassLoaderMap .get(deployDirectory + "/" + serviceRegistry[0]); servicenameIndex = 1; } String serviceName = serviceRegistry[servicenameIndex]; // log.info("servicename:"+serviceName);; synchronized (executorServiceMap) { executorServiceInfo = (ExecutorServiceInfo) executorServiceMap .get(serviceName.trim()); } ExecutorServiceInfoClassLoader classLoaderExecutorServiceInfo = new ExecutorServiceInfoClassLoader(); classLoaderExecutorServiceInfo.setClassLoader(classLoader); classLoaderExecutorServiceInfo.setExecutorServiceInfo(executorServiceInfo); resultMap.put(key, classLoaderExecutorServiceInfo); // key.interestOps(SelectionKey.OP_READ); // log.info("Key interested Ops"); // continue; } //Thread.sleep(100); /* * if (classLoader == null) throw new * Exception( * "Could able to obtain deployed class loader" * ); */ /* * log.info( * "current context classloader" + * classLoader); */ //log.info("In rad object"); bstr = new ByteArrayOutputStream(); lengthBuffer.clear(); int numberofDataRead = clientChannel.read(lengthBuffer); //log.info("numberofDataRead" // + numberofDataRead); int length = lengthBuffer.getInt(0); if (length <= 0) { iterator.remove(); continue; } lengthBuffer.clear(); //log.info(length); buffer = ByteBuffer.allocate(length); buffer.clear(); if ((bytesRead = clientChannel.read(buffer)) > 0) { // buffer.flip(); // System.out // .println(bytesRead); bstr.write(buffer.array(), 0, bytesRead); buffer.clear(); } if (bytesRead <= 0 || bytesRead < length) { //log.info("bytesRead<length"); iterator.remove(); continue; } //log.info(new String(bstr // .toByteArray())); bais = new ByteArrayInputStream(bstr.toByteArray()); ExecutorServiceInfoClassLoader classLoaderExecutorServiceInfo = (ExecutorServiceInfoClassLoader) resultMap .get(key); ois = new ClassLoaderObjectInputStream( (ClassLoader) classLoaderExecutorServiceInfo.getClassLoader(), bais); // Offending // line. // Produces // the // StreamCorruptedException. object = ois.readObject(); ois.close(); bstr.close(); executorServiceInfo = classLoaderExecutorServiceInfo.getExecutorServiceInfo(); //System.out // .println("inputStream Read Object"); //log.info("Object=" // + object.getClass()); // Thread.currentThread().setContextClassLoader(currentContextLoader); if (object instanceof ExecutorParams) { ExecutorParams exeParams = (ExecutorParams) object; Object returnValue = null; //log.info("test socket1"); String ataKey; ATAConfig ataConfig; ConcurrentHashMap ataServicesMap; Enumeration<NodeResourceInfo> noderesourceInfos = addressmap.elements(); NodeResourceInfo noderesourceinfo = null; String ip = ""; int port = 1000; long memavailable = 0; long memcurr = 0; if (noderesourceInfos.hasMoreElements()) { noderesourceinfo = noderesourceInfos.nextElement(); if (noderesourceinfo.getMax() != null) { ip = noderesourceinfo.getHost(); port = Integer.parseInt(noderesourceinfo.getPort()); memavailable = Long.parseLong(noderesourceinfo.getMax()) - Long.parseLong(noderesourceinfo.getUsed()); ; } } while (noderesourceInfos.hasMoreElements()) { noderesourceinfo = noderesourceInfos.nextElement(); if (noderesourceinfo.getMax() != null) { memcurr = Long.parseLong(noderesourceinfo.getMax()) - Long.parseLong(noderesourceinfo.getUsed()); if (memavailable <= memcurr) { ip = noderesourceinfo.getHost(); port = Integer.parseInt(noderesourceinfo.getPort()); memavailable = memcurr; } } } ATAExecutorServiceInfo servicesAvailable; Socket sock1 = new Socket(ip, port); OutputStream outputStr = sock1.getOutputStream(); ObjectOutputStream objOutputStream = new ObjectOutputStream(outputStr); NodeInfo nodeInfo = new NodeInfo(); nodeInfo.setClassNameWithPackage( executorServiceInfo.getExecutorServicesClass().getName()); nodeInfo.setMethodName(executorServiceInfo.getMethod().getName()); nodeInfo.setWebclassLoaderURLS(((WebClassLoader) classLoader).geturlS()); NodeInfoMethodParam nodeInfoMethodParam = new NodeInfoMethodParam(); nodeInfoMethodParam.setMethodParams(exeParams.getParams()); nodeInfoMethodParam .setMethodParamTypes(executorServiceInfo.getMethodParams()); //log.info("Serializable socket="+sock); //nodeInfo.setSock(sock); //nodeInfo.setOstream(sock.getOutputStream()); objOutputStream.writeObject(nodeInfo); objOutputStream = new ObjectOutputStream(outputStr); objOutputStream.writeObject(nodeInfoMethodParam); ObjectInputStream objInputStream1 = new ObjectInputStream( sock1.getInputStream()); returnValue = objInputStream1.readObject(); objOutputStream.close(); objInputStream1.close(); sock1.close(); /*returnValue = executorServiceInfo .getMethod() .invoke(executorServiceInfo .getExecutorServicesClass() .newInstance(), exeParams.getParams());*/ // Thread.currentThread().setContextClassLoader(oldCL); // log.info("Written Value=" // + returnValue.toString()); resultMap.put(key, returnValue); } key.interestOps(SelectionKey.OP_WRITE); //log.info("Key interested Ops1"); } else if (key.isWritable()) { // the channel is non blocking so keep it // open // till the // count is >=0 //log.info("In write"); ByteArrayOutputStream baos = new ByteArrayOutputStream(); // make // a // BAOS // stream ObjectOutputStream oos = new ObjectOutputStream(baos); // wrap and OOS around the // stream Object result = resultMap.get(key); oos.writeObject(result); // write an object // to // the stream oos.flush(); oos.close(); byte[] objData = baos.toByteArray(); // get // the // byte // array baos.close(); buffer = ByteBuffer.wrap(objData); // wrap // around // the // data buffer.rewind(); // buffer.flip(); //prep for writing //log.info(new String(objData)); //while (buffer.hasRemaining()) clientChannel.write(buffer); // write resultMap.remove(key); buffer.clear(); key.cancel(); clientChannel.close(); //log.info("In write1"); numberOfServicesRequests++; //log.info("Key interested Ops2"); } } iterator.remove(); } catch (Exception ex) { log.error("Error in executing the executor services thread", ex); //ex.printStackTrace(); key.cancel(); clientChannel.close(); resultMap.remove(key); //ex.printStackTrace(); } } } catch (Exception ex) { log.error("Error in executing the executor services thread", ex); //ex.printStackTrace(); } } } catch (Exception ex) { log.error("Error in executing the executor services thread", ex); } }
From source file:com.web.services.ExecutorServiceThread.java
public void run() { // create a selector that will by used for multiplexing. The selector // registers the socketserverchannel as // well as all socketchannels that are created String CLIENTCHANNELNAME = "clientChannel"; String SERVERCHANNELNAME = "serverChannel"; String channelType = "channelType"; ConcurrentHashMap<SelectionKey, Object> resultMap = new ConcurrentHashMap<SelectionKey, Object>(); ClassLoader classLoader = null; ByteArrayOutputStream bstr;//from www . j a va2 s .com ByteBuffer buffer = null; ByteBuffer lengthBuffer = ByteBuffer.allocate(4); int bytesRead; InputStream bais; ObjectInputStream ois; Object object; ExecutorServiceInfo executorServiceInfo = null; Random random = new Random(System.currentTimeMillis()); // register the serversocketchannel with the selector. The OP_ACCEPT // option marks // a selection key as ready when the channel accepts a new connection. // When the // socket server accepts a connection this key is added to the list of // selected keys of the selector. // when asked for the selected keys, this key is returned and hence we // know that a new connection has been accepted. try { Selector selector = Selector.open(); SelectionKey socketServerSelectionKey = serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT); // SelectionKey socketServerSelectionKey1 = // channel.register(selector1, // SelectionKey.OP_ACCEPT); // set property in the key that identifies the channel Map<String, String> properties = new ConcurrentHashMap<String, String>(); properties.put(channelType, SERVERCHANNELNAME); socketServerSelectionKey.attach(properties); // wait for the selected keys SelectionKey key = null; Set<SelectionKey> selectedKeys; // logger.info("Instance Number"+instanceNumber); Iterator<SelectionKey> iterator = null; SocketChannel clientChannel = null; while (true) { try { // the select method is a blocking method which returns when // atleast // one of the registered // channel is selected. In this example, when the socket // accepts // a // new connection, this method // will return. Once a socketclient is added to the list of // registered channels, then this method // would also return when one of the clients has data to be // read // or // written. It is also possible to perform a nonblocking // select // using the selectNow() function. // We can also specify the maximum time for which a select // function // can be blocked using the select(long timeout) function. if (selector.select() >= 0) { selectedKeys = selector.selectedKeys(); iterator = selectedKeys.iterator(); } while (iterator.hasNext()) { try { key = iterator.next(); // the selection key could either by the // socketserver // informing // that a new connection has been made, or // a socket client that is ready for read/write // we use the properties object attached to the // channel // to // find // out the type of channel. if (((Map) key.attachment()).get(channelType).equals(SERVERCHANNELNAME)) { // a new connection has been obtained. This // channel // is // therefore a socket server. ServerSocketChannel serverSocketChannel = (ServerSocketChannel) key.channel(); // accept the new connection on the server // socket. // Since // the // server socket channel is marked as non // blocking // this channel will return null if no client is // connected. SocketChannel clientSocketChannel = serverSocketChannel.accept(); if (clientSocketChannel != null) { // set the client connection to be non // blocking clientSocketChannel.configureBlocking(false); SelectionKey clientKey = clientSocketChannel.register(selector, SelectionKey.OP_READ, SelectionKey.OP_WRITE); Map<String, String> clientproperties = new ConcurrentHashMap<String, String>(); clientproperties.put(channelType, CLIENTCHANNELNAME); clientKey.attach(clientproperties); clientKey.interestOps(SelectionKey.OP_READ); // clientSocketChannel.close(); // write something to the new created client /* * CharBuffer buffer = * CharBuffer.wrap("Hello client"); while * (buffer.hasRemaining()) { * clientSocketChannel.write * (Charset.defaultCharset() * .encode(buffer)); } * clientSocketChannel.close(); * buffer.clear(); */ } } else { // data is available for read // buffer for reading clientChannel = (SocketChannel) key.channel(); if (key.isReadable()) { // the channel is non blocking so keep it // open // till // the // count is >=0 clientChannel = (SocketChannel) key.channel(); if (resultMap.get(key) == null) { //System.out.println(key); bstr = new ByteArrayOutputStream(); object = null; clientChannel.read(lengthBuffer); int length = lengthBuffer.getInt(0); lengthBuffer.clear(); //System.out.println(length); buffer = ByteBuffer.allocate(length); if ((bytesRead = clientChannel.read(buffer)) > 0) { // buffer.flip(); // System.out // .println(bytesRead); bstr.write(buffer.array(), 0, bytesRead); buffer.clear(); } buffer.clear(); //System.out.println("Message1"+new String(bstr // .toByteArray())); bais = new ByteArrayInputStream(bstr.toByteArray()); ois = new ObjectInputStream(bais); // Offending // line. // Produces // the // StreamCorruptedException. //System.out.println("In read obect"); object = ois.readObject(); //System.out.println("Class Cast"); //System.out.println("Class Cast1"); ois.close(); byte[] params = bstr.toByteArray(); bstr.close(); //System.out.println("readObject"); //System.out.println("After readObject"); if (object instanceof CloseSocket) { resultMap.remove(key); clientChannel.close(); key.cancel(); } // clientChannel.close(); String serviceurl = (String) object; String[] serviceRegistry = serviceurl.split("/"); //System.out.println("classLoaderMap" // + urlClassLoaderMap); //System.out.println(deployDirectory // + "/" + serviceRegistry[0]); int servicenameIndex; //System.out.println(earServicesDirectory // + "/" + serviceRegistry[0] // + "/" + serviceRegistry[1]); if (serviceRegistry[0].endsWith(".ear")) { classLoader = (VFSClassLoader) urlClassLoaderMap .get(earServicesDirectory + "/" + serviceRegistry[0] + "/" + serviceRegistry[1]); servicenameIndex = 2; } else if (serviceRegistry[0].endsWith(".jar")) { classLoader = (WebClassLoader) urlClassLoaderMap .get(jarservicesDirectory + "/" + serviceRegistry[0]); servicenameIndex = 1; } else { classLoader = (WebClassLoader) urlClassLoaderMap .get(deployDirectory + "/" + serviceRegistry[0]); servicenameIndex = 1; } String serviceName = serviceRegistry[servicenameIndex]; // System.out.println("servicename:"+serviceName);; synchronized (executorServiceMap) { executorServiceInfo = (ExecutorServiceInfo) executorServiceMap .get(serviceName.trim()); } ExecutorServiceInfoClassLoader classLoaderExecutorServiceInfo = new ExecutorServiceInfoClassLoader(); classLoaderExecutorServiceInfo.setClassLoader(classLoader); classLoaderExecutorServiceInfo.setExecutorServiceInfo(executorServiceInfo); resultMap.put(key, classLoaderExecutorServiceInfo); // key.interestOps(SelectionKey.OP_READ); // System.out.println("Key interested Ops"); // continue; } //Thread.sleep(100); /* * if (classLoader == null) throw new * Exception( * "Could able to obtain deployed class loader" * ); */ /* * System.out.println( * "current context classloader" + * classLoader); */ //System.out.println("In rad object"); bstr = new ByteArrayOutputStream(); lengthBuffer.clear(); int numberofDataRead = clientChannel.read(lengthBuffer); //System.out.println("numberofDataRead" // + numberofDataRead); int length = lengthBuffer.getInt(0); if (length <= 0) { iterator.remove(); continue; } lengthBuffer.clear(); //System.out.println(length); buffer = ByteBuffer.allocate(length); buffer.clear(); if ((bytesRead = clientChannel.read(buffer)) > 0) { // buffer.flip(); // System.out // .println(bytesRead); bstr.write(buffer.array(), 0, bytesRead); buffer.clear(); } if (bytesRead <= 0 || bytesRead < length) { //System.out.println("bytesRead<length"); iterator.remove(); continue; } //System.out.println(new String(bstr // .toByteArray())); bais = new ByteArrayInputStream(bstr.toByteArray()); ExecutorServiceInfoClassLoader classLoaderExecutorServiceInfo = (ExecutorServiceInfoClassLoader) resultMap .get(key); ois = new ClassLoaderObjectInputStream( (ClassLoader) classLoaderExecutorServiceInfo.getClassLoader(), bais); // Offending // line. // Produces // the // StreamCorruptedException. object = ois.readObject(); ois.close(); bstr.close(); executorServiceInfo = classLoaderExecutorServiceInfo.getExecutorServiceInfo(); //System.out // .println("inputStream Read Object"); //System.out.println("Object=" // + object.getClass()); // Thread.currentThread().setContextClassLoader(currentContextLoader); if (object instanceof ExecutorParams) { ExecutorParams exeParams = (ExecutorParams) object; Object returnValue = null; //System.out.println("test socket1"); String ataKey; ATAConfig ataConfig; ConcurrentHashMap ataServicesMap; ATAExecutorServiceInfo servicesAvailable; Socket sock1 = new Socket("0.0.0.0", Integer.parseInt(nodesport[random.nextInt(nodesport.length)])); OutputStream outputStr = sock1.getOutputStream(); ObjectOutputStream objOutputStream = new ObjectOutputStream(outputStr); NodeInfo nodeInfo = new NodeInfo(); nodeInfo.setClassNameWithPackage( executorServiceInfo.getExecutorServicesClass().getName()); nodeInfo.setMethodName(executorServiceInfo.getMethod().getName()); nodeInfo.setWebclassLoaderURLS(((WebClassLoader) classLoader).geturlS()); NodeInfoMethodParam nodeInfoMethodParam = new NodeInfoMethodParam(); nodeInfoMethodParam.setMethodParams(exeParams.getParams()); nodeInfoMethodParam .setMethodParamTypes(executorServiceInfo.getMethodParams()); //System.out.println("Serializable socket="+sock); //nodeInfo.setSock(sock); //nodeInfo.setOstream(sock.getOutputStream()); objOutputStream.writeObject(nodeInfo); objOutputStream = new ObjectOutputStream(outputStr); objOutputStream.writeObject(nodeInfoMethodParam); ObjectInputStream objInputStream1 = new ObjectInputStream( sock1.getInputStream()); returnValue = objInputStream1.readObject(); objOutputStream.close(); objInputStream1.close(); sock1.close(); /*returnValue = executorServiceInfo .getMethod() .invoke(executorServiceInfo .getExecutorServicesClass() .newInstance(), exeParams.getParams());*/ // Thread.currentThread().setContextClassLoader(oldCL); // System.out.println("Written Value=" // + returnValue.toString()); resultMap.put(key, returnValue); } key.interestOps(SelectionKey.OP_WRITE); //System.out.println("Key interested Ops1"); } else if (key.isWritable()) { // the channel is non blocking so keep it // open // till the // count is >=0 //System.out.println("In write"); ByteArrayOutputStream baos = new ByteArrayOutputStream(); // make // a // BAOS // stream ObjectOutputStream oos = new ObjectOutputStream(baos); // wrap and OOS around the // stream Object result = resultMap.get(key); oos.writeObject(result); // write an object // to // the stream oos.flush(); oos.close(); byte[] objData = baos.toByteArray(); // get // the // byte // array baos.close(); buffer = ByteBuffer.wrap(objData); // wrap // around // the // data buffer.rewind(); // buffer.flip(); //prep for writing //System.out.println(new String(objData)); //while (buffer.hasRemaining()) clientChannel.write(buffer); // write resultMap.remove(key); buffer.clear(); key.cancel(); clientChannel.close(); //System.out.println("In write1"); numberOfServicesRequests++; //System.out.println("Key interested Ops2"); } } iterator.remove(); } catch (Exception ex) { ex.printStackTrace(); key.cancel(); clientChannel.close(); resultMap.remove(key); //ex.printStackTrace(); } } } catch (Exception ex) { //ex.printStackTrace(); } } } catch (Exception ex) { //ex.printStackTrace(); } }
From source file:org.apache.catalina.cluster.tcp.TcpReplicationThread.java
/** * The actual code which drains the channel associated with * the given key. This method assumes the key has been * modified prior to invocation to turn off selection * interest in OP_READ. When this method completes it * re-enables OP_READ and calls wakeup() on the selector * so the selector will resume watching this channel. *//*from ww w .ja va 2 s.co m*/ private void drainChannel(SelectionKey key) throws Exception { boolean packetReceived = false; SocketChannel channel = (SocketChannel) key.channel(); int count; buffer.clear(); // make buffer empty ObjectReader reader = (ObjectReader) key.attachment(); // loop while data available, channel is non-blocking while ((count = channel.read(buffer)) > 0) { buffer.flip(); // make buffer readable int pkgcnt = reader.append(buffer.array(), 0, count); buffer.clear(); // make buffer empty } //check to see if any data is available int pkgcnt = reader.execute(); while (pkgcnt > 0) { if (synchronous) { sendAck(key, channel); } //end if pkgcnt--; } if (count < 0) { // close channel on EOF, invalidates the key channel.close(); return; } // resume interest in OP_READ, OP_WRITE key.interestOps(key.interestOps() | SelectionKey.OP_READ); // cycle the selector so this key is active again key.selector().wakeup(); }
From source file:org.apache.htrace.impl.PackedBufferManager.java
private void doRecv(SelectionKey sockKey, ByteBuffer response) throws IOException { sockKey.interestOps(SelectionKey.OP_READ); SocketChannel sock = (SocketChannel) sockKey.attachment(); int totalRead = response.remaining(); long startMs = TimeUtil.nowMs(); long remainingMs = conf.ioTimeoutMs; while (remainingMs > 0) { selector.select(remainingMs);/* w ww . ja v a 2s . c o m*/ for (SelectionKey key : selector.selectedKeys()) { if (key.isReadable()) { sock.read(response); } } if (response.remaining() == 0) { if (LOG.isTraceEnabled()) { LOG.trace("Received all " + totalRead + " bytes from " + conf.endpointStr); } return; } remainingMs = updateRemainingMs(startMs, conf.ioTimeoutMs); if (LOG.isTraceEnabled()) { LOG.trace("Received " + (totalRead - response.remaining()) + " out of " + totalRead + " bytes from " + conf.endpointStr); } if (remainingMs == 0) { throw new IOException("Attempt to write to " + conf.endpointStr + " timed out after " + TimeUtil.deltaMs(startMs, TimeUtil.nowMs()) + " ms."); } } }
From source file:org.apache.james.CassandraConfTest.java
private String getServerConnectionResponse(SocketChannel socketChannel) throws IOException { ByteBuffer byteBuffer = ByteBuffer.allocate(1000); socketChannel.read(byteBuffer); byte[] bytes = byteBuffer.array(); return new String(bytes, Charset.forName("UTF-8")); }
From source file:org.apache.nifi.processor.util.listen.handler.socket.StandardSocketChannelHandler.java
@Override public void run() { boolean eof = false; SocketChannel socketChannel = null; try {/* w w w. j a v a2s . c om*/ int bytesRead; socketChannel = (SocketChannel) key.channel(); final SocketChannelAttachment attachment = (SocketChannelAttachment) key.attachment(); final ByteBuffer socketBuffer = attachment.getByteBuffer(); // read until the buffer is full while ((bytesRead = socketChannel.read(socketBuffer)) > 0) { // prepare byte buffer for reading socketBuffer.flip(); // mark the current position as start, in case of partial message read socketBuffer.mark(); // process the contents that have been read into the buffer processBuffer(socketChannel, socketBuffer); // Preserve bytes in buffer for next call to run // NOTE: This code could benefit from the two ByteBuffer read calls to avoid // this compact for higher throughput socketBuffer.reset(); socketBuffer.compact(); logger.debug("bytes read {}", new Object[] { bytesRead }); } // Check for closed socket if (bytesRead < 0) { eof = true; logger.debug("Reached EOF, closing connection"); } else { logger.debug("No more data available, returning for selection"); } } catch (ClosedByInterruptException | InterruptedException e) { logger.debug("read loop interrupted, closing connection"); // Treat same as closed socket eof = true; } catch (ClosedChannelException e) { // ClosedChannelException doesn't have a message so handle it separately from IOException logger.error("Error reading from channel due to channel being closed", e); // Treat same as closed socket eof = true; } catch (IOException e) { logger.error("Error reading from channel due to {}", new Object[] { e.getMessage() }, e); // Treat same as closed socket eof = true; } finally { if (eof == true) { IOUtils.closeQuietly(socketChannel); dispatcher.completeConnection(key); } else { dispatcher.addBackForSelection(key); } } }
From source file:org.cloudata.core.commitlog.pipe.Bulk.java
public int readFromChannel(SocketChannel ch, ByteBuffer buf) throws IOException { int curNumRead; if ((curNumRead = ch.read(buf)) < 0) { throw new IOException("End of stream"); }// w ww . j ava 2 s. co m return curNumRead; }
From source file:org.cloudata.core.commitlog.pipe.Message.java
public boolean read(SocketChannel channel) throws IOException { if (readingHeaderPhase) { if (channel.read(headerBuf) == -1) { throw new IOException("End of stream"); }/*from ww w . j ava 2s . c o m*/ if (headerBuf.hasRemaining()) { return false; } decodeHeader(); buffer = ByteBuffer.allocate(length); readingHeaderPhase = false; } if (channel.read(buffer) == -1) { throw new IOException("End of stream"); } if (!buffer.hasRemaining()) { buffer.flip(); readingHeaderPhase = true; return true; } return false; }
From source file:org.gcaldaemon.core.ldap.LDAPListener.java
private final void processRead(SelectionKey key) throws Exception { // Read packet from socket channel sleep(100);/*from w ww .j a v a 2s . com*/ byte[] bytes = null; Object att = key.attachment(); if (att != null && att instanceof byte[]) { bytes = (byte[]) att; } SocketChannel channel = (SocketChannel) key.channel(); requestBuffer.clear(); int len = channel.read(requestBuffer); if (len == -1) { throw new IOException(); } if (len != 0) { requestBuffer.flip(); byte[] packet = new byte[len]; requestBuffer.get(packet, 0, len); if (bytes == null || bytes.length == 0) { bytes = packet; key.attach(bytes); } else { byte[] swap = new byte[bytes.length + packet.length]; System.arraycopy(bytes, 0, swap, 0, bytes.length); System.arraycopy(packet, 0, swap, bytes.length, packet.length); bytes = swap; key.attach(bytes); } // Try to process packet LdapMessageContainer container = new LdapMessageContainer(); try { ByteBuffer buffer = ByteBuffer.wrap(bytes); LdapDecoder decoder = new LdapDecoder(); decoder.decode(buffer, container); } catch (DecoderException emptyStringException) { String msg = emptyStringException.getMessage(); if (msg != null && (msg.indexOf("empty") != -1 || msg.indexOf("transition") != -1)) { // All contacts requested int id = container.getMessageId(); SearchRequest search = new SearchRequest(); search.setMessageId(id); LdapMessage ldap = new LdapMessage(); ldap.setMessageId(id); ldap.setProtocolOP(search); container.setLdapMessage(ldap); } else { throw emptyStringException; } } // Process LDAP request ByteBuffer response = processRequest(container.getLdapMessage(), !container.isGrammarEndAllowed()); key.attach(response); key.interestOps(SelectionKey.OP_WRITE); } }
From source file:org.gldapdaemon.core.ldap.LDAPListener.java
private final void processRead(SelectionKey key) throws Exception { // Read packet from socket channel sleep(100);/*from ww w. ja va 2 s . c o m*/ byte[] bytes = null; Object att = key.attachment(); if (att != null && att instanceof byte[]) { bytes = (byte[]) att; } SocketChannel channel = (SocketChannel) key.channel(); requestBuffer.clear(); int len = channel.read(requestBuffer); if (len == -1) { throw new IOException(); } if (len != 0) { requestBuffer.flip(); byte[] packet = new byte[len]; requestBuffer.get(packet, 0, len); if (bytes == null || bytes.length == 0) { bytes = packet; key.attach(bytes); } else { byte[] swap = new byte[bytes.length + packet.length]; System.arraycopy(bytes, 0, swap, 0, bytes.length); System.arraycopy(packet, 0, swap, bytes.length, packet.length); bytes = swap; key.attach(bytes); } // Try to process packet LdapMessageContainer container = new LdapMessageContainer(); try { ByteBuffer buffer = ByteBuffer.wrap(bytes); LdapDecoder decoder = new LdapDecoder(); decoder.decode(buffer, container); } catch (DecoderException emptyStringException) { String msg = emptyStringException.getMessage(); if (msg != null && (msg.indexOf("empty") != -1 || msg.indexOf("transition") != -1)) { // All contacts requested int id = container.getMessageId(); SearchRequest search = new SearchRequest(); search.setMessageId(id); LdapMessage ldap = new LdapMessage(); ldap.setMessageId(id); ldap.setProtocolOP(search); container.setLdapMessage(ldap); } else { throw emptyStringException; } } // Process LDAP request ByteBuffer response = processRequest(container.getLdapMessage(), !container.isGrammarEndAllowed()); key.attach(response); key.interestOps(SelectionKey.OP_WRITE); } }