Examples of org.eclipse.jetty.util.thread.ThreadPool

org.eclipse.jetty.util.thread.ThreadPool
ThreadPool. A specialization of Executor interface that provides reporting methods (eg {@link #getThreads()}) and the option of configuration methods (e.g. @link {@link SizedThreadPool#setMaxThreads(int)}).

            connections+=connector.getConnectedEndPoints().size();


            Executor executor = connector.getExecutor();
            if (executor instanceof ThreadPool)
            {
                ThreadPool threadpool=(ThreadPool) executor;
                if (_monitorThreads && threadpool.isLowOnThreads())
                {
                    reasons=low(reasons,"Low on threads: "+threadpool);
                    cause+="T";
                }
            }

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        Server server = _server;
        boolean shared = true;


        if (server == null)
        {
            ThreadPool threadPool = new DelegatingThreadPool(new QueuedThreadPool());
            server = new Server(threadPool);


            HandlerCollection handlerCollection = new HandlerCollection();
            handlerCollection.setHandlers(new Handler[] {new ContextHandlerCollection(), new DefaultHandler()});
            server.setHandler(handlerCollection);

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    @Override
    public void setExecutor(Executor executor)
    {
        if (executor == null)
            throw new IllegalArgumentException("missing required 'executor' argument");
        ThreadPool threadPool = _server.getThreadPool();
        if (threadPool instanceof DelegatingThreadPool)
            ((DelegatingThreadPool)_server.getThreadPool()).setExecutor(executor);
        else
            throw new UnsupportedOperationException("!DelegatingThreadPool");
    }

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    }


    @Override
    public Executor getExecutor()
    {
        ThreadPool threadPool = _server.getThreadPool();
        if (threadPool instanceof DelegatingThreadPool)
            return ((DelegatingThreadPool)_server.getThreadPool()).getExecutor();
        return threadPool;
    }

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    private final class ConnectorSelectorManager extends SelectorManager
    {
        @Override
        public boolean dispatch(Runnable task)
        {
            ThreadPool pool=getThreadPool();
            if (pool==null)
                pool=getServer().getThreadPool();
            return pool.dispatch(task);
        }

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    }
    
    protected void setupThreadPool() {
        AbstractConnector aconn = (AbstractConnector) connector;
        if (isSetThreadingParameters()) {
            ThreadPool pool = aconn.getThreadPool();
            if (pool == null) {
                pool = aconn.getServer().getThreadPool();
            }
            if (pool == null) {
                pool = new QueuedThreadPool();
                aconn.getServer().setThreadPool(pool);
                aconn.setThreadPool(pool);
            }
            //threads for the acceptors and selectors are taken from 
            //the pool so we need to have room for those
            int acc = aconn.getAcceptors() * 2;
            if (getThreadingParameters().isSetMaxThreads()
                && getThreadingParameters().getMaxThreads() <= acc) {
                throw new Fault(new Message("NOT_ENOUGH_THREADS", LOG,
                                            port,
                                            acc + 1,
                                            getThreadingParameters().getMaxThreads(),
                                            acc));
            }
            if (pool instanceof QueuedThreadPool) {
                QueuedThreadPool pl = (QueuedThreadPool)pool;
                if (getThreadingParameters().isSetMinThreads()) {
                    pl.setMinThreads(getThreadingParameters().getMinThreads());
                }
                if (getThreadingParameters().isSetMaxThreads()) {
                    pl.setMaxThreads(getThreadingParameters().getMaxThreads());
                }
            } else {
                try {
                    if (getThreadingParameters().isSetMinThreads()) {
                        pool.getClass().getMethod("setMinThreads", Integer.TYPE)
                            .invoke(pool, getThreadingParameters().getMinThreads());
                    }
                    if (getThreadingParameters().isSetMaxThreads()) {
                        pool.getClass().getMethod("setMaxThreads", Integer.TYPE)
                            .invoke(pool, getThreadingParameters().getMaxThreads());
                    }
                } catch (Throwable t) {
                    //ignore - this won't happen for Jetty 7.1 - 7.2 and 7.3 and newer 
                    //will be instanceof QueuedThreadPool above

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        http.setAcceptQueueSize(1024);
        http.setSoLingerTime(Duration.seconds(30));


        Server server = new Server();
        MetricRegistry metrics = new MetricRegistry();
        ThreadPool threadPool = new QueuedThreadPool();


        ServerConnector connector = (ServerConnector) http.build(server, metrics, "test-http-connector", threadPool);


        assertThat(connector.getPort()).isEqualTo(8080);
        assertThat(connector.getHost()).isEqualTo("127.0.0.1");

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    }


    @Override
    public Server build(Environment environment) {
        printBanner(environment.getName());
        final ThreadPool threadPool = createThreadPool(environment.metrics());
        final Server server = buildServer(environment.lifecycle(), threadPool);
        environment.getApplicationContext().setContextPath(applicationContextPath);
        final Handler applicationHandler = createAppServlet(server,
                                                            environment.jersey(),
                                                            environment.getObjectMapper(),

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    }


    @Override
    public Server build(Environment environment) {
        printBanner(environment.getName());
        final ThreadPool threadPool = createThreadPool(environment.metrics());
        final Server server = buildServer(environment.lifecycle(), threadPool);


        environment.getApplicationContext().setContextPath(applicationContextPath);
        final Handler applicationHandler = createAppServlet(server,
                                                            environment.jersey(),

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    @Override
    protected void doStop() throws Exception
    {
        _selectorManager.stop();


        ThreadPool threadPool = _threadPool;
        if (_privateThreadPool && _threadPool != null && threadPool instanceof LifeCycle)
            ((LifeCycle)threadPool).stop();


        super.doStop();
    }

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