Example usage for java.nio.channels AsynchronousChannelGroup shutdownNow

Introduction

In this page you can find the example usage for java.nio.channels AsynchronousChannelGroup shutdownNow.

Prototype

public abstract void shutdownNow() throws IOException;

Source Link

Document

Shuts down the group and closes all open channels in the group.

Usage

From source file:net.transmutator4j.RunTransmutator4j.java

@Override
public void run() {

    long startTime = System.currentTimeMillis();
    InetAddress localhost;//w  w  w  .  java 2 s.  co  m
    try {
        localhost = InetAddress.getLocalHost();
    } catch (UnknownHostException e) {
        throw new IllegalStateException("can not resolve local host", e);
    }
    //socket get dynamically generated port
    SocketAddress socket = new InetSocketAddress(localhost, 0);
    AsynchronousChannelGroup group;
    try {
        group = AsynchronousChannelGroup.withFixedThreadPool(10, Executors.defaultThreadFactory());
    } catch (IOException e1) {
        throw new IllegalStateException("can not create channel group", e1);
    }

    try (

            AsynchronousServerSocketChannel server = AsynchronousServerSocketChannel.open(group).bind(socket,
                    1);

    ) {

        int numTotalTests = runUnmutatedTests();
        long unmutatedTimeEnd = System.currentTimeMillis();
        long unmutatedElapsedTime = unmutatedTimeEnd - startTime;
        listener.testInfo(numTotalTests, unmutatedElapsedTime);
        System.out.println("unmutated tests took " + unmutatedElapsedTime + " ms");
        long timeOut = computeTimeoutTime(unmutatedElapsedTime);
        InetSocketAddress inetSocketAddress = (InetSocketAddress) server.getLocalAddress();
        int port = inetSocketAddress.getPort();
        server.accept(null, new CompletionHandler<AsynchronousSocketChannel, Object>() {
            @Override
            public void completed(AsynchronousSocketChannel resultChannel, Object attachment) {
                try {
                    ObjectInputStream in = new ObjectInputStream(Channels.newInputStream(resultChannel));
                    MutationTestResult testResult = (MutationTestResult) in.readObject();

                    in.close();

                    listener.mutationResult(testResult);
                    boolean stillPassed = testResult.testsStillPassed();
                    System.out.print(stillPassed ? "P" : ".");
                    System.out.flush();
                    numberOfMutationsMade++;

                    if (stillPassed) {
                        numberOfMutationsThatStillPassedTests++;
                    }
                } catch (IOException | ClassNotFoundException e) {
                    e.printStackTrace();
                    throw new RuntimeException("error getting test result ", e);
                }
                //accept a new connection
                server.accept(null, this);

            }

            @Override
            public void failed(Throwable e, Object attachment) {
                //   System.err.println(attachment + " failed with:" + e.getClass().getName());
                //    e.printStackTrace();
            }
        });

        OUTER: for (String classToMutate : new ClassPathClassRepository()) {
            boolean shouldMutate = shouldMutate(classToMutate);
            if (shouldMutate) {
                System.out.printf("mutating %s%n", classToMutate);
                boolean done = false;
                int mutationCount = 0;
                while (!done) {
                    JavaProcessBuilder builder = new JavaProcessBuilder(

                            "net.transmutator4j.Transmutator4j", classToMutate, nameOfTestSuite,
                            Integer.toString(mutationCount), Integer.toString(port));

                    try {
                        TimedProcess timedProcess = new TimedProcess(builder.getBuilder(), timeOut);
                        int exitValue = timedProcess.call();

                        TransmutatorUtil.EXIT_STATES exitState = TransmutatorUtil.EXIT_STATES
                                .getValueFor(exitValue);
                        if (exitState == TransmutatorUtil.EXIT_STATES.NO_MUTATIONS_MADE) {
                            done = true;
                            System.out.println();
                        } else if (exitState == TransmutatorUtil.EXIT_STATES.TIMED_OUT) {
                            numberOfMutationsThatTimedOut++;

                        }

                    } catch (InterruptedException e) {
                        System.err.println("detected cancellation...halting");
                        //stop iterating through all the classes
                        //by breaking out of outer for loop
                        break OUTER;
                    }

                    mutationCount++;

                }

            }
        }
        //kill any waiting connections this will cause the completionHandler's fail to get called
        group.shutdownNow();
        //group.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);

        long endTime = System.currentTimeMillis();
        System.out.printf("took %d ms to run %d mutations of which %d caused timeouts and %d still passed%n",
                (endTime - startTime), numberOfMutationsMade, numberOfMutationsThatTimedOut,
                numberOfMutationsThatStillPassedTests);

    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        if (listener != null) {
            try {
                listener.close();
            } catch (IOException ignored) {
                //ignore
            }
        }
        group.shutdown();
    }
}

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