author | chegar |
Thu, 29 Mar 2018 17:52:06 +0100 | |
branch | http-client-branch |
changeset 56369 | 24a8fafec3ff |
parent 56261 | a339fe1aab55 |
child 56451 | 9585061fdb04 |
permissions | -rw-r--r-- |
48083 | 1 |
/* |
56369
24a8fafec3ff
http-client-branch: review comment - update copyright year ranges in tests
chegar
parents:
56261
diff
changeset
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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import java.io.IOException; |
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import java.util.LinkedList; |
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import java.util.Objects; |
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import java.util.stream.Stream; |
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// Each stream has one of these for input. Each Http2Connection has one |
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// for output. Can be used blocking or asynchronously. |
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public class Queue<T> implements ExceptionallyCloseable { |
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private final LinkedList<T> q = new LinkedList<>(); |
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private boolean closed = false; |
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private boolean closing = false; |
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private Throwable exception = null; |
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private int waiters; // true if someone waiting |
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private final T closeSentinel; |
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Queue(T closeSentinel) { |
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this.closeSentinel = Objects.requireNonNull(closeSentinel); |
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} |
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public synchronized int size() { |
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return q.size(); |
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} |
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56261
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
parents:
55973
diff
changeset
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public synchronized boolean isClosed() { |
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
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55973
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return closed; |
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
parents:
55973
diff
changeset
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} |
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
parents:
55973
diff
changeset
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a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
parents:
55973
diff
changeset
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public synchronized boolean isClosing() { |
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
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55973
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return closing; |
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
parents:
55973
diff
changeset
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} |
a339fe1aab55
http-client-branch: fix issue with client-closed streams in test HTTP/2 server
dfuchs
parents:
55973
diff
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public synchronized void put(T obj) throws IOException { |
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Objects.requireNonNull(obj); |
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if (closed || closing) { |
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throw new IOException("stream closed"); |
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} |
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q.add(obj); |
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if (waiters > 0) { |
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notifyAll(); |
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} |
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} |
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// Other close() variants are immediate and abortive |
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// This allows whatever is on Q to be processed first. |
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public synchronized void orderlyClose() { |
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if (closing || closed) |
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return; |
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try { |
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put(closeSentinel); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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closing = true; |
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} |
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@Override |
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public synchronized void close() { |
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if (closed) |
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return; |
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closed = true; |
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notifyAll(); |
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} |
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@Override |
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public synchronized void closeExceptionally(Throwable t) { |
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if (exception == null) exception = t; |
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else if (t != null && t != exception) { |
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if (!Stream.of(exception.getSuppressed()) |
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.filter(x -> x == t) |
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.findFirst() |
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.isPresent()) |
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{ |
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exception.addSuppressed(t); |
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} |
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} |
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close(); |
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} |
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public synchronized T take() throws IOException { |
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if (closed) { |
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throw newIOException("stream closed"); |
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} |
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try { |
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while (q.size() == 0) { |
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waiters++; |
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wait(); |
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if (closed) { |
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throw newIOException("Queue closed"); |
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} |
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waiters--; |
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} |
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T item = q.removeFirst(); |
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if (item.equals(closeSentinel)) { |
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closed = true; |
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assert q.isEmpty(); |
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return null; |
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} |
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return item; |
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} catch (InterruptedException ex) { |
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throw new IOException(ex); |
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} |
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} |
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public synchronized T poll() throws IOException { |
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if (closed) { |
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throw newIOException("stream closed"); |
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} |
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if (q.isEmpty()) { |
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return null; |
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} |
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return take(); |
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} |
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private IOException newIOException(String msg) { |
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if (exception == null) { |
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return new IOException(msg); |
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} else { |
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return new IOException(msg, exception); |
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} |
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} |
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} |