Java Code Examples for java.util.concurrent.ThreadPoolExecutor#setMaximumPoolSize()

/**
 * 修改线程池
 *
 * @param executor
 * @param name
 * @param parametric
 * @param coreKey
 * @param maxKey
 */
public static void updateThreadPool(final ThreadPoolExecutor executor, final String name, final Parametric parametric,
                                    final String coreKey, final String maxKey) {
    if (executor == null) {
        return;
    }
    Integer core = parametric.getInteger(coreKey);
    if (core != null && core > 0 && core != executor.getCorePoolSize()) {
        logger.info(String.format("Core pool size of %s is changed from %d to %d",
                name, executor.getCorePoolSize(), core));
        executor.setCorePoolSize(core);
    }
    Integer max = parametric.getInteger(maxKey);
    if (max != null && max > 0 && max != executor.getMaximumPoolSize()) {
        logger.info(String.format("Maximum pool size of %s is changed from %d to %d",
                name, executor.getMaximumPoolSize(), max));
        executor.setMaximumPoolSize(max);
    }
}
 

@Override
public void init() throws ServletException {
	reNewThreadPool();
    Runnable c = new Runnable() {
        @Override
        public void run() {
            ThreadPoolExecutor p = poolExecutorRef.get();
            p.setCorePoolSize(coreSize.get());
            p.setMaximumPoolSize(maximumSize.get());
            p.setKeepAliveTime(aliveTime.get(),TimeUnit.MILLISECONDS);
        }
    };
    
    coreSize.addCallback(c);
    maximumSize.addCallback(c);
    aliveTime.addCallback(c);
    
    // TODO metrics reporting
}
 

@Override
protected void doInitialize() {
    // .触发SPI
    logger.info("tConsole -> trigger TelStartContextListener.onStart");
    this.spiTrigger.notifySpiWithoutResult(TelStartContextListener.class, listener -> {
        listener.onStart(AbstractTelService.this);
    });
    //
    logger.info("tConsole -> applyCommand.");
    this.applyCommand();
    this.addCommand(new String[] { "get", "set" }, new GetSetExecutor());
    this.addCommand(new String[] { "quit", "exit" }, new QuitExecutor());
    this.addCommand(new String[] { "help" }, new HelpExecutor());
    //
    // .执行线程池
    String shortName = "tConsole-Work";
    int workSize = 2;
    this.executor = Executors.newScheduledThreadPool(workSize, new NameThreadFactory(shortName, this.classLoader));
    ThreadPoolExecutor threadPool = (ThreadPoolExecutor) this.executor;
    threadPool.setCorePoolSize(workSize);
    threadPool.setMaximumPoolSize(workSize);
    logger.info("tConsole -> create TelnetHandler , threadShortName={} , workThreadSize = {}.", shortName, workSize);
}
 

public KanboardAPI(String serverURL, final String username, final String password) throws IOException {
        Authenticator.setDefault(new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password.toCharArray());
            }

        });
        kanboardURL = KanboardAPI.sanitizeURL(serverURL.trim());
        Log.i(Constants.TAG, String.format("Host uses %s", kanboardURL.getProtocol()));
//        threadPoolExecutor = new ThreadPoolExecutor(12, 12, 20, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(256));
        threadPoolExecutor = (ThreadPoolExecutor) AsyncTask.THREAD_POOL_EXECUTOR;
        threadPoolExecutor.setCorePoolSize(12);
        threadPoolExecutor.setMaximumPoolSize(12);
    }
 

public static void testThreadPoolExecutor() {
    ThreadPoolExecutor fixedPoolExecutor = (ThreadPoolExecutor) Executors.newFixedThreadPool(10);
    ThreadPoolExecutor cachedPoolExecutor = (ThreadPoolExecutor) Executors.newCachedThreadPool();

    ThreadPoolExecutor executor = new ThreadPoolExecutor(4, 6, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
    executor.setMaximumPoolSize(8);

    ScheduledThreadPoolExecutor scheduledExecutor = (ScheduledThreadPoolExecutor) Executors.newScheduledThreadPool(5);
}
 

/**
 * setMaximumPoolSize(int) throws IllegalArgumentException
 * if given a value less the core pool size
 */
public void testMaximumPoolSizeIllegalArgumentException() {
    final ThreadPoolExecutor p =
        new CustomTPE(2, 3,
                      LONG_DELAY_MS, MILLISECONDS,
                      new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

/**
 * setMaximumPoolSize throws IllegalArgumentException
 * if given a negative value
 */
public void testMaximumPoolSizeIllegalArgumentException2() {
    final ThreadPoolExecutor p =
        new ThreadPoolExecutor(2, 3,
                               LONG_DELAY_MS, MILLISECONDS,
                               new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(-1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

/**
 * setMaximumPoolSize(int) throws IllegalArgumentException if
 * given a value less the core pool size
 */
public void testMaximumPoolSizeIllegalArgumentException() {
    final ThreadPoolExecutor p =
        new ThreadPoolExecutor(2, 3,
                               LONG_DELAY_MS, MILLISECONDS,
                               new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

/**
 * getMaximumPoolSize returns value given in constructor if not
 * otherwise set
 */
public void testGetMaximumPoolSize() {
    final ThreadPoolExecutor p =
        new ThreadPoolExecutor(2, 3,
                               LONG_DELAY_MS, MILLISECONDS,
                               new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        assertEquals(3, p.getMaximumPoolSize());
        p.setMaximumPoolSize(5);
        assertEquals(5, p.getMaximumPoolSize());
        p.setMaximumPoolSize(4);
        assertEquals(4, p.getMaximumPoolSize());
    }
}
 

public void testCorePoolSizeGreaterThanMax() {
    ThreadPoolExecutor tp = new ThreadPoolExecutor(
            1 /* core pool size */, 1 /* max pool size */,
            1000, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<>(10));

    // It should be illegal to set a core pool size that's larger than the max
    // pool size but apps have been allowed to get away with it so far. The pattern
    // below occurs in a commonly used library. Note that the executor is in a sane
    // state at the end of both method calls.
    tp.setCorePoolSize(5);
    tp.setMaximumPoolSize(5);
}
 

protected void modified(Map<String, Object> properties) {
    for (Entry<String, Object> entry : properties.entrySet()) {
        if (Constants.SERVICE_PID.equals(entry.getKey()) || ComponentConstants.COMPONENT_ID.equals(entry.getKey())
                || ComponentConstants.COMPONENT_NAME.equals(entry.getKey())) {
            continue;
        }
        String poolName = entry.getKey();
        Object config = entry.getValue();
        if (config == null) {
            configs.remove(poolName);
        }
        if (config instanceof String) {
            try {
                Integer poolSize = Integer.valueOf((String) config);
                configs.put(poolName, poolSize);
                ThreadPoolExecutor pool = (ThreadPoolExecutor) pools.get(poolName);
                if (pool instanceof ScheduledThreadPoolExecutor) {
                    pool.setCorePoolSize(poolSize);
                    LOGGER.debug("Updated scheduled thread pool '{}' to size {}", poolName, poolSize);
                } else if (pool instanceof QueueingThreadPoolExecutor) {
                    pool.setMaximumPoolSize(poolSize);
                    LOGGER.debug("Updated queuing thread pool '{}' to size {}", poolName, poolSize);
                }
            } catch (NumberFormatException e) {
                LOGGER.warn("Ignoring invalid configuration for pool '{}': {} - value must be an integer", poolName,
                        config);
                continue;
            }
        }
    }
}
 

private void resetThreadPoolSize() {
	if (!ThreadPoolExecutor.class.isInstance(SumkThreadPool.executor())) {
		return;
	}
	ThreadPoolExecutor pool = (ThreadPoolExecutor) SumkThreadPool.executor();
	int size = AppInfo.getInt("sumk.core.threadpool.core", 0);
	if (size > 0 && pool.getCorePoolSize() != size) {
		logger.info("change ThreadPool size from {} to {}", pool.getCorePoolSize(), size);
		pool.setCorePoolSize(size);
	}

	size = AppInfo.getInt("sumk.core.threadpool.max", 0);
	if (size > 0 && pool.getMaximumPoolSize() != size) {
		logger.info("change ThreadPool max size from {} to {}", pool.getMaximumPoolSize(), size);
		pool.setMaximumPoolSize(size);
	}

	size = AppInfo.getInt("sumk.core.threadpool.aliveTime", 0);
	if (size > 0 && pool.getKeepAliveTime(TimeUnit.MILLISECONDS) != size) {
		logger.info("change ThreadPool keepalive time from {} to {}", pool.getKeepAliveTime(TimeUnit.MILLISECONDS),
				size);
		pool.setKeepAliveTime(size, TimeUnit.MILLISECONDS);
	}

	String v = AppInfo.get("sumk.core.threadpool.allowCoreThreadTimeOut", null);
	if (v != null) {
		boolean allowCoreTimeout = "1".equals(v) || "true".equalsIgnoreCase(v);
		if (allowCoreTimeout != pool.allowsCoreThreadTimeOut()) {
			logger.info("change ThreadPool allowsCoreThreadTimeOut from {} to {}", pool.allowsCoreThreadTimeOut(),
					allowCoreTimeout);
			pool.allowCoreThreadTimeOut(allowCoreTimeout);
		}
	}
}
 

/**
 * setMaximumPoolSize throws IllegalArgumentException
 * if given a negative value
 */
public void testMaximumPoolSizeIllegalArgumentException2() {
    final ThreadPoolExecutor p =
        new CustomTPE(2, 3,
                      LONG_DELAY_MS,
                      MILLISECONDS,new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(-1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

/**
 * setMaximumPoolSize(int) throws IllegalArgumentException
 * if given a value less the core pool size
 */
public void testMaximumPoolSizeIllegalArgumentException() {
    final ThreadPoolExecutor p =
        new CustomTPE(2, 3,
                      LONG_DELAY_MS, MILLISECONDS,
                      new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

/**
 * getMaximumPoolSize returns value given in constructor if not
 * otherwise set
 */
public void testGetMaximumPoolSize() {
    final ThreadPoolExecutor p =
        new CustomTPE(2, 3,
                      LONG_DELAY_MS, MILLISECONDS,
                      new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        assertEquals(3, p.getMaximumPoolSize());
        p.setMaximumPoolSize(5);
        assertEquals(5, p.getMaximumPoolSize());
        p.setMaximumPoolSize(4);
        assertEquals(4, p.getMaximumPoolSize());
    }
}
 

/**
 * setMaximumPoolSize throws IllegalArgumentException
 * if given a negative value
 */
public void testMaximumPoolSizeIllegalArgumentException2() {
    final ThreadPoolExecutor p =
        new ThreadPoolExecutor(2, 3,
                               LONG_DELAY_MS, MILLISECONDS,
                               new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(-1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

/**
 * setMaximumPoolSize(int) throws IllegalArgumentException if
 * given a value less the core pool size
 */
public void testMaximumPoolSizeIllegalArgumentException() {
    final ThreadPoolExecutor p =
        new ThreadPoolExecutor(2, 3,
                               LONG_DELAY_MS, MILLISECONDS,
                               new ArrayBlockingQueue<Runnable>(10));
    try (PoolCleaner cleaner = cleaner(p)) {
        try {
            p.setMaximumPoolSize(1);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }
}
 

protected void modified(Map<String, Object> properties) {
    for (Entry<String, Object> entry : properties.entrySet()) {
        if (entry.getKey().equals("service.pid") || entry.getKey().equals("component.id")
                || entry.getKey().equals("component.name")) {
            continue;
        }
        String poolName = entry.getKey();
        Object config = entry.getValue();
        if (config == null) {
            configs.remove(poolName);
        }
        if (config instanceof String) {
            try {
                Integer poolSize = Integer.valueOf((String) config);
                configs.put(poolName, poolSize);
                ThreadPoolExecutor pool = (ThreadPoolExecutor) pools.get(poolName);
                if (pool instanceof ScheduledThreadPoolExecutor) {
                    pool.setCorePoolSize(poolSize);
                    LOGGER.debug("Updated scheduled thread pool '{}' to size {}",
                            new Object[] { poolName, poolSize });
                } else if (pool instanceof QueueingThreadPoolExecutor) {
                    pool.setMaximumPoolSize(poolSize);
                    LOGGER.debug("Updated queuing thread pool '{}' to size {}",
                            new Object[] { poolName, poolSize });
                }
            } catch (NumberFormatException e) {
                LOGGER.warn("Ignoring invalid configuration for pool '{}': {} - value must be an integer",
                        new Object[] { poolName, config });
                continue;
            }
        }
    }
}
 

public KanboardAPI(String serverURL, final String username, final String password) throws IOException {
        Authenticator.setDefault(new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password.toCharArray());
            }

        });
        kanboardURL = KanboardAPI.sanitizeURL(serverURL.trim());
        Log.i(Constants.TAG, String.format("Host uses %s", kanboardURL.getProtocol()));
//        threadPoolExecutor = new ThreadPoolExecutor(12, 12, 20, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(256));
        threadPoolExecutor = (ThreadPoolExecutor) AsyncTask.THREAD_POOL_EXECUTOR;
        threadPoolExecutor.setCorePoolSize(12);
        threadPoolExecutor.setMaximumPoolSize(12);
    }
 

@Override
public void setStartStopThreads(int startStopThreads) {
    this.startStopThreads = startStopThreads;

    // Use local copies to ensure thread safety
    ThreadPoolExecutor executor = startStopExecutor;
    if (executor != null) {
        int newThreads = getStartStopThreadsInternal();
        executor.setMaximumPoolSize(newThreads);
        executor.setCorePoolSize(newThreads);
    }
}