7026287: Asynchronous API sample

Summary: Implement a chat server using the new asynchronous networking API
Reviewed-by: hosterda, alanb

--HG--
extra : rebase_source : 61d8c30f3b16b9d1a6c3dc104ada01d0202acaf4

1 files changed, 399 insertions, 0 deletions

diff --git a/test/sample/chatserver/ChatTest.java b/test/sample/chatserver/ChatTest.java
new file mode 100644
index 000000000..05d6f44e8
--- /dev/null
+++ b/test/sample/chatserver/ChatTest.java
@@ -0,0 +1,399 @@
+/*
+ * Copyright (c) 2011 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+/* @test
+ * @summary Test chat server chatserver test
+ *
+ * @library ../../../src/share/sample/nio/chatserver
+ * @build ChatTest ChatServer Client ClientReader DataReader MessageReader NameReader
+ * @run main ChatTest
+ */
+
+import java.io.*;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.CyclicBarrier;
+
+public class ChatTest {
+    public static int listeningPort = 0;
+
+    public static void main(String[] args) throws Throwable {
+        testStartStop();
+        testPortOpen();
+        testAsksForName();
+        testUseName();
+        testConnectDisconnectConnect();
+        testUsernameAndMessage();
+        testDontReceiveMessageInNameState();
+    }
+
+    private static ChatServer startServer() throws IOException {
+        ChatServer server = new ChatServer(0);
+        InetSocketAddress address = (InetSocketAddress) server.getSocketAddress();
+        listeningPort = address.getPort();
+        server.run();
+        return server;
+    }
+
+    public static void testStartStop() throws Exception {
+        ChatServer server = startServer();
+        server.shutdown();
+    }
+
+    public static void testPortOpen() throws Exception {
+        ChatServer server = startServer();
+        try {
+            Socket socket = new Socket("localhost", listeningPort);
+            if (!socket.isConnected()) {
+                throw new RuntimeException("Failed to connect to server: port not open");
+            }
+        } finally {
+            server.shutdown();
+        }
+    }
+
+    public static void testAsksForName() throws Exception {
+        ChatServer server = startServer();
+        try {
+            Socket socket = new Socket("localhost", listeningPort);
+
+            Reader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+            String string = readAvailableString(reader);
+            if (!string.equals("Name: ")) {
+                throw new RuntimeException("Server doesn't send Name: ");
+            }
+        } finally {
+            server.shutdown();
+        }
+    }
+
+    public static void testUseName() throws Throwable {
+        ChatServer server = startServer();
+        try {
+            performTestUseName();
+        } finally {
+            server.shutdown();
+        }
+    }
+
+    public static void testConnectDisconnectConnect() throws Exception {
+        ChatServer server = startServer();
+        try {
+            performTestConnectDisconnectConnect();
+        } finally {
+            server.shutdown();
+        }
+    }
+
+    public static void testUsernameAndMessage() throws Exception {
+        ChatServer server = startServer();
+        try {
+            performTestUsernameAndMessage();
+        } finally {
+            server.shutdown();
+        }
+    }
+
+    public static void testDontReceiveMessageInNameState() throws Exception {
+        ChatServer server = startServer();
+        try {
+            performDontReceiveMessageInNameState();
+        } finally {
+            server.shutdown();
+        }
+    }
+
+    private static void assertEqual(List<Exception> exception, Object value, Object expected) {
+        if (expected == value) {
+            return;
+        }
+        if (expected == null) {
+            exception.add(new RuntimeException("Expected null, but was: " + value));
+            return;
+        }
+        if (!expected.equals(value)) {
+            exception.add(new RuntimeException("Expected: " + expected + " but was: " + value));
+            return;
+        }
+    }
+
+    private static void performDontReceiveMessageInNameState() throws Exception {
+        final CyclicBarrier barrier1 = new CyclicBarrier(2);
+        final CyclicBarrier barrier2 = new CyclicBarrier(2);
+        final CyclicBarrier barrier3 = new CyclicBarrier(2);
+        final List<Exception> exceptions = Collections.synchronizedList(new ArrayList<Exception>());
+
+        ChatConnection chatConnection = new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "Name: ");
+                writer.write("testClient1\n");
+                waitForJoin(reader, "testClient1");
+                barrier1.await();
+                writer.write("Ignore this!\n");
+                barrier2.await();
+                barrier3.await();
+            }
+        };
+
+        Thread client2 = new Thread(new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                barrier1.await();
+                barrier2.await();
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "Name: ");
+                string = readAvailableString(reader, true);
+                assertEqual(exceptions, string, null);
+                writer.write("testClient2\n");
+                barrier3.await();
+            }
+        });
+
+        client2.start();
+        chatConnection.run();
+        if (!exceptions.isEmpty()) {
+            throw exceptions.get(0);
+        }
+
+    }
+
+    private static void waitForJoin(BufferedReader reader, String s) throws IOException {
+        String joined;
+        do {
+            joined = readAvailableString(reader);
+        } while (!(joined != null && joined.contains("Welcome " + s)));
+    }
+
+    private static void performTestUsernameAndMessage() throws Exception {
+        final CyclicBarrier barrier1 = new CyclicBarrier(2);
+        final CyclicBarrier barrier2 = new CyclicBarrier(2);
+        final CyclicBarrier barrier3 = new CyclicBarrier(2);
+        final List<Exception> exceptions = Collections.synchronizedList(new ArrayList<Exception>());
+
+        ChatConnection chatConnection = new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "Name: ");
+                writer.write("testClient1\n");
+                waitForJoin(reader, "testClient1");
+                barrier1.await();
+                barrier2.await();
+                string = readAvailableString(reader);
+                assertEqual(exceptions, string, "testClient2: Hello world!\n");
+                barrier3.await();
+            }
+        };
+
+        Thread client2 = new Thread(new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "Name: ");
+                barrier1.await();
+                writer.write("testClient2\nHello world!\n");
+                barrier2.await();
+                barrier3.await();
+            }
+        });
+
+        client2.start();
+        chatConnection.run();
+        if (!exceptions.isEmpty()) {
+            throw exceptions.get(0);
+        }
+    }
+
+    private static void performTestConnectDisconnectConnect() throws Exception {
+        final CyclicBarrier barrier1 = new CyclicBarrier(2);
+        final CyclicBarrier barrier2 = new CyclicBarrier(2);
+        final CyclicBarrier barrier3 = new CyclicBarrier(2);
+        final List<Exception> exceptions = new ArrayList<Exception>();
+
+        ChatConnection chatConnection = new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "Name: ");
+                writer.write("testClient1\n");
+            }
+        };
+
+        ChatConnection chatConnection2 = new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                readAvailableString(reader);
+                writer.write("testClient1\n");
+                waitForJoin(reader, "testClient1");
+                barrier1.await();
+                writer.write("Good morning!\n");
+                barrier2.await();
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "testClient2: Hello world!\n");
+                barrier3.await();
+            }
+        };
+
+        Thread client2 = new Thread(new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                readAvailableString(reader);
+                writer.write("testClient2\n");
+                waitForJoin(reader, "testClient2");
+                barrier1.await();
+                writer.write("Hello world!\n");
+                barrier2.await();
+                String string = readAvailableString(reader);
+                assertEqual(exceptions, string, "testClient1: Good morning!\n");
+                barrier3.await();
+            }
+        });
+
+        client2.start();
+        chatConnection.run();
+        chatConnection2.run();
+        if (!exceptions.isEmpty()) {
+            throw exceptions.get(0);
+        }
+    }
+
+    private static void performTestUseName() throws Exception {
+        final CyclicBarrier barrier1 = new CyclicBarrier(2);
+        final CyclicBarrier barrier2 = new CyclicBarrier(2);
+        final CyclicBarrier barrier3 = new CyclicBarrier(2);
+        final List<Exception> exceptions = new ArrayList<Exception>();
+
+        ChatConnection chatConnection = new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                String string = readAvailableString(reader);
+                if (!"Name: ".equals(string)) {
+                    exceptions.add(new RuntimeException("Expected Name: "));
+                }
+                writer.write("testClient1\n");
+                waitForJoin(reader, "testClient1");
+                barrier1.await();
+                barrier2.await();
+                string = readAvailableString(reader);
+                if (!"testClient2: Hello world!\n".equals(string)) {
+                    exceptions.add(new RuntimeException("testClient2: Hello world!\n"));
+                }
+                barrier3.await();
+            }
+        };
+
+        Thread client2 = new Thread(new ChatConnection() {
+            @Override
+            public void run(Socket socket, BufferedReader reader, Writer writer) throws Exception {
+                String string = readAvailableString(reader);
+                if (!"Name: ".equals(string)) {
+                    exceptions.add(new RuntimeException("Expected Name: "));
+                }
+                writer.write("testClient2\n");
+                waitForJoin(reader, "testClient2");
+                barrier1.await();
+                writer.write("Hello world!\n");
+                barrier2.await();
+                barrier3.await();
+            }
+        });
+
+        client2.start();
+        chatConnection.run();
+        if (!exceptions.isEmpty()) {
+            throw exceptions.get(0);
+        }
+    }
+
+    private static String readAvailableString(Reader reader) throws IOException {
+        return readAvailableString(reader, false);
+    }
+
+    private static String readAvailableString(Reader reader, boolean now) throws IOException {
+        StringBuilder builder = new StringBuilder();
+        int bytes;
+        if (now && !reader.ready()) {
+            return null;
+        }
+        do {
+            char[] buf = new char[256];
+            bytes = reader.read(buf);
+            builder.append(buf, 0, bytes);
+        } while (bytes == 256);
+        return builder.toString();
+    }
+
+    private abstract static class ChatConnection implements Runnable {
+        public Exception exception;
+
+        @Override
+        public void run() {
+            try (Socket socket = new Socket("localhost", listeningPort);
+            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+            Writer writer = new FlushingWriter(new OutputStreamWriter(socket.getOutputStream()))) {
+                socket.setTcpNoDelay(true);
+
+                run(socket, reader, writer);
+            } catch (Exception e) {
+                exception = e;
+            }
+        }
+
+        public abstract void run(Socket socket, BufferedReader reader, Writer writer) throws Exception;
+    }
+
+    private static class FlushingWriter extends Writer {
+        public final Writer delegate;
+
+        private FlushingWriter(Writer delegate) {
+            this.delegate = delegate;
+        }
+
+        @Override
+        public void write(char[] cbuf, int off, int len) throws IOException {
+            delegate.write(cbuf, off, len);
+        }
+
+        @Override
+        public void flush() throws IOException {
+            delegate.flush();
+        }
+
+        @Override
+        public void close() throws IOException {
+            delegate.close();
+        }
+
+        @Override
+        public void write(String str) throws IOException {
+            super.write(str);
+            flush();
+        }
+    }
+}