diff options
Diffstat (limited to 'qpid/java/common/src/main/java/org/apache/qpid/transport/network/io/IoSender.java')
| -rw-r--r-- | qpid/java/common/src/main/java/org/apache/qpid/transport/network/io/IoSender.java | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/qpid/transport/network/io/IoSender.java b/qpid/java/common/src/main/java/org/apache/qpid/transport/network/io/IoSender.java new file mode 100644 index 0000000000..66b97e8225 --- /dev/null +++ b/qpid/java/common/src/main/java/org/apache/qpid/transport/network/io/IoSender.java @@ -0,0 +1,307 @@ +/* + * 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.qpid.transport.network.io; + +import static org.apache.qpid.transport.util.Functions.mod; + +import java.io.IOException; +import java.io.OutputStream; +import java.net.Socket; +import java.nio.ByteBuffer; +import java.util.concurrent.atomic.AtomicBoolean; + +import org.apache.qpid.thread.Threading; +import org.apache.qpid.transport.Sender; +import org.apache.qpid.transport.SenderException; +import org.apache.qpid.transport.TransportException; +import org.apache.qpid.transport.util.Logger; + + +public final class IoSender implements Runnable, Sender<ByteBuffer> +{ + + private static final Logger log = Logger.get(IoSender.class); + + // by starting here, we ensure that we always test the wraparound + // case, we should probably make this configurable somehow so that + // we can test other cases as well + private final static int START = Integer.MAX_VALUE - 10; + + private final IoContext ioCtx; + private final long timeout; + private final Socket socket; + private final OutputStream out; + + private final byte[] buffer; + private volatile int head = START; + private volatile int tail = START; + private volatile boolean idle = true; + private final Object notFull = new Object(); + private final Object notEmpty = new Object(); + private final AtomicBoolean closed = new AtomicBoolean(false); + private final Thread senderThread; + + private volatile Throwable exception = null; + + + public IoSender(IoContext ioCtx, int bufferSize, long timeout) + { + this.ioCtx = ioCtx; + this.socket = ioCtx.getSocket(); + this.buffer = new byte[pof2(bufferSize)]; // buffer size must be a power of 2 + this.timeout = timeout; + + try + { + out = socket.getOutputStream(); + } + catch (IOException e) + { + throw new TransportException("Error getting output stream for socket", e); + } + + try + { + senderThread = Threading.getThreadFactory().createThread(this); + } + catch(Exception e) + { + throw new Error("Error creating IOSender thread",e); + } + + senderThread.setDaemon(true); + senderThread.setName(String.format("IoSender - %s", socket.getRemoteSocketAddress())); + senderThread.start(); + } + + private static final int pof2(int n) + { + int result = 1; + while (result < n) + { + result *= 2; + } + return result; + } + + public void send(ByteBuffer buf) + { + if (closed.get()) + { + throw new SenderException("sender is closed", exception); + } + + final int size = buffer.length; + int remaining = buf.remaining(); + + while (remaining > 0) + { + final int hd = head; + final int tl = tail; + + if (hd - tl >= size) + { + flush(); + synchronized (notFull) + { + long start = System.currentTimeMillis(); + long elapsed = 0; + while (!closed.get() && head - tail >= size && elapsed < timeout) + { + try + { + notFull.wait(timeout - elapsed); + } + catch (InterruptedException e) + { + // pass + } + elapsed += System.currentTimeMillis() - start; + } + + if (closed.get()) + { + throw new SenderException("sender is closed", exception); + } + + if (head - tail >= size) + { + throw new SenderException(String.format("write timed out: %s, %s", head, tail)); + } + } + continue; + } + + final int hd_idx = mod(hd, size); + final int tl_idx = mod(tl, size); + final int length; + + if (tl_idx > hd_idx) + { + length = Math.min(tl_idx - hd_idx, remaining); + } + else + { + length = Math.min(size - hd_idx, remaining); + } + + buf.get(buffer, hd_idx, length); + head += length; + remaining -= length; + } + } + + public void flush() + { + if (idle) + { + synchronized (notEmpty) + { + notEmpty.notify(); + } + } + } + + public void close() + { + close(true); + } + + void close(boolean reportException) + { + if (!closed.getAndSet(true)) + { + synchronized (notFull) + { + notFull.notify(); + } + + synchronized (notEmpty) + { + notEmpty.notify(); + } + + try + { + if (Thread.currentThread() != senderThread) + { + senderThread.join(timeout); + if (senderThread.isAlive()) + { + throw new SenderException("join timed out"); + } + } + ioCtx.getReceiver().close(false); + } + catch (InterruptedException e) + { + throw new SenderException(e); + } + + if (reportException && exception != null) + { + throw new SenderException(exception); + } + } + } + + public void run() + { + final int size = buffer.length; + while (true) + { + final int hd = head; + final int tl = tail; + + if (hd == tl) + { + if (closed.get()) + { + break; + } + + idle = true; + + synchronized (notEmpty) + { + while (head == tail && !closed.get()) + { + try + { + notEmpty.wait(); + } + catch (InterruptedException e) + { + // pass + } + } + } + + idle = false; + + continue; + } + + final int hd_idx = mod(hd, size); + final int tl_idx = mod(tl, size); + + final int length; + if (tl_idx < hd_idx) + { + length = hd_idx - tl_idx; + } + else + { + length = size - tl_idx; + } + + try + { + out.write(buffer, tl_idx, length); + } + catch (IOException e) + { + log.error(e, "error in write thread"); + exception = e; + close(false); + break; + } + tail += length; + if (head - tl >= size) + { + synchronized (notFull) + { + notFull.notify(); + } + } + } + } + + public void setIdleTimeout(int i) + { + try + { + socket.setSoTimeout(i); + } + catch (Exception e) + { + throw new SenderException(e); + } + } +} |