| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.mina.transport.vmpipe; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Queue; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| |
| import org.apache.mina.core.buffer.IoBuffer; |
| import org.apache.mina.core.filterchain.DefaultIoFilterChain; |
| import org.apache.mina.core.service.IoProcessor; |
| import org.apache.mina.core.session.AbstractIoSession; |
| import org.apache.mina.core.session.IdleStatus; |
| import org.apache.mina.core.session.IoEvent; |
| import org.apache.mina.core.session.IoEventType; |
| import org.apache.mina.core.write.WriteRequest; |
| import org.apache.mina.core.write.WriteRequestQueue; |
| import org.apache.mina.core.write.WriteToClosedSessionException; |
| import org.apache.mina.filter.FilterEvent; |
| |
| /** |
| * TODO Add documentation |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| class VmPipeFilterChain extends DefaultIoFilterChain { |
| |
| private final Queue<IoEvent> eventQueue = new ConcurrentLinkedQueue<IoEvent>(); |
| |
| private final IoProcessor<VmPipeSession> processor = new VmPipeIoProcessor(); |
| |
| private volatile boolean flushEnabled; |
| |
| private volatile boolean sessionOpened; |
| |
| VmPipeFilterChain(AbstractIoSession session) { |
| super(session); |
| } |
| |
| IoProcessor<VmPipeSession> getProcessor() { |
| return processor; |
| } |
| |
| public void start() { |
| flushEnabled = true; |
| flushEvents(); |
| flushPendingDataQueues((VmPipeSession) getSession()); |
| } |
| |
| private void pushEvent(IoEvent e) { |
| pushEvent(e, flushEnabled); |
| } |
| |
| private void pushEvent(IoEvent e, boolean flushNow) { |
| eventQueue.add(e); |
| if (flushNow) { |
| flushEvents(); |
| } |
| } |
| |
| private void flushEvents() { |
| IoEvent e; |
| while ((e = eventQueue.poll()) != null) { |
| fireEvent(e); |
| } |
| } |
| |
| private void fireEvent(IoEvent e) { |
| VmPipeSession session = (VmPipeSession) getSession(); |
| IoEventType type = e.getType(); |
| Object data = e.getParameter(); |
| |
| switch (type) { |
| case EVENT: |
| super.fireEvent((FilterEvent) data); |
| break; |
| |
| case EXCEPTION_CAUGHT: |
| super.fireExceptionCaught((Throwable) data); |
| break; |
| |
| case CLOSE: |
| super.fireFilterClose(); |
| break; |
| |
| case INPUT_CLOSED: |
| super.fireInputClosed(); |
| break; |
| |
| case MESSAGE_SENT: |
| super.fireMessageSent((WriteRequest) data); |
| break; |
| |
| case MESSAGE_RECEIVED: |
| if (sessionOpened && (!session.isReadSuspended()) && session.getLock().tryLock()) { |
| try { |
| if (session.isReadSuspended()) { |
| session.receivedMessageQueue.add(data); |
| } else { |
| super.fireMessageReceived(data); |
| } |
| } finally { |
| session.getLock().unlock(); |
| } |
| } else { |
| session.receivedMessageQueue.add(data); |
| } |
| |
| break; |
| |
| case SESSION_CLOSED: |
| flushPendingDataQueues(session); |
| super.fireSessionClosed(); |
| break; |
| |
| case SESSION_CREATED: |
| session.getLock().lock(); |
| try { |
| super.fireSessionCreated(); |
| } finally { |
| session.getLock().unlock(); |
| } |
| |
| break; |
| |
| case SESSION_IDLE: |
| super.fireSessionIdle((IdleStatus) data); |
| break; |
| |
| case SESSION_OPENED: |
| super.fireSessionOpened(); |
| sessionOpened = true; |
| break; |
| |
| case WRITE: |
| super.fireFilterWrite((WriteRequest) data); |
| break; |
| } |
| } |
| |
| private static void flushPendingDataQueues(VmPipeSession s) { |
| s.getProcessor().updateTrafficControl(s); |
| s.getRemoteSession().getProcessor().updateTrafficControl(s); |
| } |
| |
| @Override |
| public void fireEvent(FilterEvent event) { |
| pushEvent(new IoEvent(IoEventType.EVENT, getSession(), event)); |
| } |
| |
| @Override |
| public void fireFilterClose() { |
| pushEvent(new IoEvent(IoEventType.CLOSE, getSession(), null)); |
| } |
| |
| @Override |
| public void fireInputClosed() { |
| pushEvent(new IoEvent(IoEventType.INPUT_CLOSED, getSession(), null)); |
| } |
| |
| @Override |
| public void fireFilterWrite(WriteRequest writeRequest) { |
| pushEvent(new IoEvent(IoEventType.WRITE, getSession(), writeRequest)); |
| } |
| |
| @Override |
| public void fireExceptionCaught(Throwable cause) { |
| pushEvent(new IoEvent(IoEventType.EXCEPTION_CAUGHT, getSession(), cause)); |
| } |
| |
| @Override |
| public void fireMessageSent(WriteRequest request) { |
| pushEvent(new IoEvent(IoEventType.MESSAGE_SENT, getSession(), request)); |
| } |
| |
| @Override |
| public void fireSessionClosed() { |
| pushEvent(new IoEvent(IoEventType.SESSION_CLOSED, getSession(), null)); |
| } |
| |
| @Override |
| public void fireSessionCreated() { |
| pushEvent(new IoEvent(IoEventType.SESSION_CREATED, getSession(), null)); |
| } |
| |
| @Override |
| public void fireSessionIdle(IdleStatus status) { |
| pushEvent(new IoEvent(IoEventType.SESSION_IDLE, getSession(), status)); |
| } |
| |
| @Override |
| public void fireSessionOpened() { |
| pushEvent(new IoEvent(IoEventType.SESSION_OPENED, getSession(), null)); |
| } |
| |
| @Override |
| public void fireMessageReceived(Object message) { |
| pushEvent(new IoEvent(IoEventType.MESSAGE_RECEIVED, getSession(), message)); |
| } |
| |
| private class VmPipeIoProcessor implements IoProcessor<VmPipeSession> { |
| public void flush(VmPipeSession session) { |
| WriteRequestQueue queue = session.getWriteRequestQueue0(); |
| if (!session.isClosing()) { |
| session.getLock().lock(); |
| try { |
| if (queue.isEmpty(session)) { |
| return; |
| } |
| WriteRequest req; |
| long currentTime = System.currentTimeMillis(); |
| while ((req = queue.poll(session)) != null) { |
| Object m = req.getMessage(); |
| pushEvent(new IoEvent(IoEventType.MESSAGE_SENT, session, req), false); |
| session.getRemoteSession().getFilterChain().fireMessageReceived(getMessageCopy(m)); |
| if (m instanceof IoBuffer) { |
| session.increaseWrittenBytes0(((IoBuffer) m).remaining(), currentTime); |
| } |
| } |
| } finally { |
| if (flushEnabled) { |
| flushEvents(); |
| } |
| session.getLock().unlock(); |
| } |
| |
| flushPendingDataQueues(session); |
| } else { |
| List<WriteRequest> failedRequests = new ArrayList<WriteRequest>(); |
| WriteRequest req; |
| while ((req = queue.poll(session)) != null) { |
| failedRequests.add(req); |
| } |
| |
| if (!failedRequests.isEmpty()) { |
| WriteToClosedSessionException cause = new WriteToClosedSessionException(failedRequests); |
| for (WriteRequest r : failedRequests) { |
| r.getFuture().setException(cause); |
| } |
| session.getFilterChain().fireExceptionCaught(cause); |
| } |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void write(VmPipeSession session, WriteRequest writeRequest) { |
| WriteRequestQueue writeRequestQueue = session.getWriteRequestQueue(); |
| |
| writeRequestQueue.offer(session, writeRequest); |
| |
| if (!session.isWriteSuspended()) { |
| this.flush(session); |
| } |
| } |
| |
| private Object getMessageCopy(Object message) { |
| Object messageCopy = message; |
| if (message instanceof IoBuffer) { |
| IoBuffer rb = (IoBuffer) message; |
| rb.mark(); |
| IoBuffer wb = IoBuffer.allocate(rb.remaining()); |
| wb.put(rb); |
| wb.flip(); |
| rb.reset(); |
| messageCopy = wb; |
| } |
| return messageCopy; |
| } |
| |
| public void remove(VmPipeSession session) { |
| try { |
| session.getLock().lock(); |
| if (!session.getCloseFuture().isClosed()) { |
| session.getServiceListeners().fireSessionDestroyed(session); |
| session.getRemoteSession().closeNow(); |
| } |
| } finally { |
| session.getLock().unlock(); |
| } |
| } |
| |
| public void add(VmPipeSession session) { |
| // Unused |
| } |
| |
| public void updateTrafficControl(VmPipeSession session) { |
| if (!session.isReadSuspended()) { |
| List<Object> data = new ArrayList<Object>(); |
| session.receivedMessageQueue.drainTo(data); |
| for (Object aData : data) { |
| VmPipeFilterChain.this.fireMessageReceived(aData); |
| } |
| } |
| |
| if (!session.isWriteSuspended()) { |
| flush(session); |
| } |
| } |
| |
| public void dispose() { |
| // Nothing to dispose |
| } |
| |
| public boolean isDisposed() { |
| return false; |
| } |
| |
| public boolean isDisposing() { |
| return false; |
| } |
| } |
| } |