mirror of https://github.com/longtai-cn/hippo4j
chen.ma
3 years ago
parent
82256ea5e7
commit
ed17f48ddf
@ -0,0 +1,985 @@
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package io.dynamic.threadpool.starter.wrap;
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import lombok.Getter;
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import java.security.AccessControlContext;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.util.*;
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import java.util.concurrent.*;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.locks.AbstractQueuedSynchronizer;
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import java.util.concurrent.locks.Condition;
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import java.util.concurrent.locks.ReentrantLock;
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/**
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* Custom Thread Pool Wrap.
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*
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* @author chen.ma
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* @date 2021/7/8 21:47
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*/
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@Getter
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public final class CustomThreadPoolExecutor extends ThreadPoolExecutor {
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private final AtomicInteger regectCount = new AtomicInteger();
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private final AtomicInteger ctl = new AtomicInteger(ctlOf(RUNNING, 0));
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private static final int COUNT_BITS = Integer.SIZE - 3;
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private static final int CAPACITY = (1 << COUNT_BITS) - 1;
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private static final int RUNNING = -1 << COUNT_BITS;
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private static final int SHUTDOWN = 0 << COUNT_BITS;
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private static final int STOP = 1 << COUNT_BITS;
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private static final int TIDYING = 2 << COUNT_BITS;
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private static final int TERMINATED = 3 << COUNT_BITS;
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private static int runStateOf(int c) {
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return c & ~CAPACITY;
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}
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private static int workerCountOf(int c) {
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return c & CAPACITY;
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}
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private static int ctlOf(int rs, int wc) {
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return rs | wc;
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}
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private static boolean runStateLessThan(int c, int s) {
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return c < s;
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}
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private static boolean runStateAtLeast(int c, int s) {
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return c >= s;
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}
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private static boolean isRunning(int c) {
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return c < SHUTDOWN;
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}
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private boolean compareAndIncrementWorkerCount(int expect) {
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return ctl.compareAndSet(expect, expect + 1);
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}
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private boolean compareAndDecrementWorkerCount(int expect) {
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return ctl.compareAndSet(expect, expect - 1);
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}
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private void decrementWorkerCount() {
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do {
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} while (!compareAndDecrementWorkerCount(ctl.get()));
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}
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public Integer getRegectCount() {
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return regectCount.get();
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}
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private final BlockingQueue<Runnable> workQueue;
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private final ReentrantLock mainLock = new ReentrantLock();
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private final HashSet<Worker> workers = new HashSet();
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private final Condition termination = mainLock.newCondition();
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private int largestPoolSize;
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private long completedTaskCount;
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private volatile ThreadFactory threadFactory;
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private volatile RejectedExecutionHandler handler;
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private volatile long keepAliveTime;
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private volatile boolean allowCoreThreadTimeOut;
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private volatile int corePoolSize;
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private volatile int maximumPoolSize;
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private static final RejectedExecutionHandler defaultHandler =
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new ThreadPoolExecutor.AbortPolicy();
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private static final RuntimePermission shutdownPerm =
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new RuntimePermission("modifyThread");
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private final AccessControlContext acc;
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private final class Worker
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extends AbstractQueuedSynchronizer
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implements Runnable {
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private static final long serialVersionUID = 6138294804551838833L;
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final Thread thread;
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Runnable firstTask;
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volatile long completedTasks;
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Worker(Runnable firstTask) {
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setState(-1); // inhibit interrupts until runWorker
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this.firstTask = firstTask;
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this.thread = getThreadFactory().newThread(this);
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}
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@Override
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public void run() {
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runWorker(this);
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}
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@Override
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protected boolean isHeldExclusively() {
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return getState() != 0;
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}
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@Override
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protected boolean tryAcquire(int unused) {
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if (compareAndSetState(0, 1)) {
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setExclusiveOwnerThread(Thread.currentThread());
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return true;
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}
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return false;
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}
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@Override
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protected boolean tryRelease(int unused) {
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setExclusiveOwnerThread(null);
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setState(0);
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return true;
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}
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public void lock() {
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acquire(1);
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}
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public boolean tryLock() {
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return tryAcquire(1);
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}
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public void unlock() {
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release(1);
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}
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public boolean isLocked() {
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return isHeldExclusively();
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}
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void interruptIfStarted() {
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Thread t;
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if (getState() >= 0 && (t = thread) != null && !t.isInterrupted()) {
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try {
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t.interrupt();
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} catch (SecurityException ignore) {
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}
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}
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}
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}
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private void advanceRunState(int targetState) {
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for (; ; ) {
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int c = ctl.get();
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if (runStateAtLeast(c, targetState) ||
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ctl.compareAndSet(c, ctlOf(targetState, workerCountOf(c)))) {
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break;
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}
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}
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}
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final void tryTerminate() {
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for (; ; ) {
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int c = ctl.get();
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if (isRunning(c) ||
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runStateAtLeast(c, TIDYING) ||
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(runStateOf(c) == SHUTDOWN && !workQueue.isEmpty())) {
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return;
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}
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if (workerCountOf(c) != 0) {
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interruptIdleWorkers(ONLY_ONE);
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return;
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}
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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if (ctl.compareAndSet(c, ctlOf(TIDYING, 0))) {
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try {
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terminated();
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} finally {
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ctl.set(ctlOf(TERMINATED, 0));
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termination.signalAll();
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}
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return;
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}
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} finally {
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mainLock.unlock();
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}
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}
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}
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private void checkShutdownAccess() {
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SecurityManager security = System.getSecurityManager();
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if (security != null) {
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security.checkPermission(shutdownPerm);
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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for (Worker w : workers) {
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security.checkAccess(w.thread);
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}
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} finally {
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mainLock.unlock();
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}
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}
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}
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private void interruptWorkers() {
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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for (Worker w : workers) {
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w.interruptIfStarted();
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}
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} finally {
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mainLock.unlock();
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}
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}
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private void interruptIdleWorkers(boolean onlyOne) {
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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for (Worker w : workers) {
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Thread t = w.thread;
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if (!t.isInterrupted() && w.tryLock()) {
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try {
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t.interrupt();
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} catch (SecurityException ignore) {
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} finally {
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w.unlock();
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}
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}
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if (onlyOne) {
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break;
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}
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}
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} finally {
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mainLock.unlock();
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}
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}
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private void interruptIdleWorkers() {
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interruptIdleWorkers(false);
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}
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private static final boolean ONLY_ONE = true;
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final void reject(Runnable command) {
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regectCount.incrementAndGet();
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handler.rejectedExecution(command, this);
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}
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void onShutdown() {
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}
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final boolean isRunningOrShutdown(boolean shutdownOK) {
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int rs = runStateOf(ctl.get());
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return rs == RUNNING || (rs == SHUTDOWN && shutdownOK);
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}
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private List<Runnable> drainQueue() {
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BlockingQueue<Runnable> q = workQueue;
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ArrayList<Runnable> taskList = new ArrayList<Runnable>();
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q.drainTo(taskList);
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if (!q.isEmpty()) {
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for (Runnable r : q.toArray(new Runnable[0])) {
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if (q.remove(r)) {
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taskList.add(r);
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}
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}
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}
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return taskList;
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}
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private boolean addWorker(Runnable firstTask, boolean core) {
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retry:
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for (; ; ) {
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int c = ctl.get();
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int rs = runStateOf(c);
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// Check if queue empty only if necessary.
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if (rs >= SHUTDOWN &&
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!(rs == SHUTDOWN &&
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firstTask == null &&
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!workQueue.isEmpty())) {
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return false;
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}
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for (; ; ) {
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int wc = workerCountOf(c);
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if (wc >= CAPACITY ||
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wc >= (core ? corePoolSize : maximumPoolSize)) {
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return false;
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}
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if (compareAndIncrementWorkerCount(c)) {
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break retry;
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}
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c = ctl.get();
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if (runStateOf(c) != rs) {
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continue retry;
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}
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}
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}
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boolean workerStarted = false;
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boolean workerAdded = false;
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Worker w = null;
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try {
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w = new Worker(firstTask);
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final Thread t = w.thread;
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if (t != null) {
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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int rs = runStateOf(ctl.get());
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if (rs < SHUTDOWN ||
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(rs == SHUTDOWN && firstTask == null)) {
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if (t.isAlive()) {
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throw new IllegalThreadStateException();
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}
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workers.add(w);
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int s = workers.size();
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if (s > largestPoolSize) {
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largestPoolSize = s;
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}
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workerAdded = true;
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}
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} finally {
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mainLock.unlock();
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}
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if (workerAdded) {
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t.start();
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workerStarted = true;
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}
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}
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} finally {
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if (!workerStarted) {
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addWorkerFailed(w);
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}
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}
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return workerStarted;
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}
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private void addWorkerFailed(Worker w) {
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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if (w != null) {
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workers.remove(w);
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}
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decrementWorkerCount();
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tryTerminate();
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} finally {
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mainLock.unlock();
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}
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}
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private void processWorkerExit(Worker w, boolean completedAbruptly) {
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if (completedAbruptly) {
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decrementWorkerCount();
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}
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final ReentrantLock mainLock = this.mainLock;
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mainLock.lock();
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try {
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completedTaskCount += w.completedTasks;
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workers.remove(w);
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} finally {
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mainLock.unlock();
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}
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tryTerminate();
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int c = ctl.get();
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if (runStateLessThan(c, STOP)) {
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if (!completedAbruptly) {
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int min = allowCoreThreadTimeOut ? 0 : corePoolSize;
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if (min == 0 && !workQueue.isEmpty()) {
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min = 1;
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}
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if (workerCountOf(c) >= min) {
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return; // replacement not needed
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}
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}
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addWorker(null, false);
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}
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}
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private Runnable getTask() {
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boolean timedOut = false;
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for (; ; ) {
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int c = ctl.get();
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int rs = runStateOf(c);
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if (rs >= SHUTDOWN && (rs >= STOP || workQueue.isEmpty())) {
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decrementWorkerCount();
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return null;
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}
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int wc = workerCountOf(c);
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boolean timed = allowCoreThreadTimeOut || wc > corePoolSize;
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if ((wc > maximumPoolSize || (timed && timedOut))
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&& (wc > 1 || workQueue.isEmpty())) {
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if (compareAndDecrementWorkerCount(c)) {
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return null;
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}
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continue;
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}
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try {
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Runnable r = timed ?
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workQueue.poll(keepAliveTime, TimeUnit.NANOSECONDS) :
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workQueue.take();
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if (r != null) {
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return r;
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}
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timedOut = true;
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} catch (InterruptedException retry) {
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timedOut = false;
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}
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}
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}
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final void runWorker(Worker w) {
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Thread wt = Thread.currentThread();
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Runnable task = w.firstTask;
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w.firstTask = null;
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w.unlock();
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boolean completedAbruptly = true;
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try {
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while (task != null || (task = getTask()) != null) {
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w.lock();
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if ((runStateAtLeast(ctl.get(), STOP) ||
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(Thread.interrupted() &&
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runStateAtLeast(ctl.get(), STOP))) &&
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!wt.isInterrupted()) {
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wt.interrupt();
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}
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try {
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beforeExecute(wt, task);
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Throwable thrown = null;
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try {
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task.run();
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} catch (RuntimeException x) {
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thrown = x;
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throw x;
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} catch (Error x) {
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thrown = x;
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throw x;
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} catch (Throwable x) {
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thrown = x;
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throw new Error(x);
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} finally {
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afterExecute(task, thrown);
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}
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} finally {
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task = null;
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w.completedTasks++;
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w.unlock();
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}
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}
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completedAbruptly = false;
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} finally {
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processWorkerExit(w, completedAbruptly);
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}
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}
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public CustomThreadPoolExecutor(int corePoolSize,
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int maximumPoolSize,
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long keepAliveTime,
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TimeUnit unit,
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BlockingQueue<Runnable> workQueue) {
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this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
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Executors.defaultThreadFactory(), defaultHandler);
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}
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public CustomThreadPoolExecutor(int corePoolSize,
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int maximumPoolSize,
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long keepAliveTime,
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TimeUnit unit,
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BlockingQueue<Runnable> workQueue,
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ThreadFactory threadFactory) {
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this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
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threadFactory, defaultHandler);
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}
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public CustomThreadPoolExecutor(int corePoolSize,
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int maximumPoolSize,
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long keepAliveTime,
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TimeUnit unit,
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BlockingQueue<Runnable> workQueue,
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RejectedExecutionHandler handler) {
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this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
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Executors.defaultThreadFactory(), handler);
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}
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public CustomThreadPoolExecutor(int corePoolSize,
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int maximumPoolSize,
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long keepAliveTime,
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TimeUnit unit,
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BlockingQueue<Runnable> workQueue,
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ThreadFactory threadFactory,
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RejectedExecutionHandler handler) {
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super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory, handler);
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if (corePoolSize < 0 ||
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maximumPoolSize <= 0 ||
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maximumPoolSize < corePoolSize ||
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keepAliveTime < 0) {
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throw new IllegalArgumentException();
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}
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if (workQueue == null || threadFactory == null || handler == null) {
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throw new NullPointerException();
|
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}
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this.acc = System.getSecurityManager() == null ?
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null :
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AccessController.getContext();
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this.corePoolSize = corePoolSize;
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this.maximumPoolSize = maximumPoolSize;
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this.workQueue = workQueue;
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this.keepAliveTime = unit.toNanos(keepAliveTime);
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this.threadFactory = threadFactory;
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this.handler = handler;
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}
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@Override
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public void execute(Runnable command) {
|
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if (command == null) {
|
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throw new NullPointerException();
|
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}
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int c = ctl.get();
|
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if (workerCountOf(c) < corePoolSize) {
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if (addWorker(command, true)) {
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return;
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}
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c = ctl.get();
|
||||
}
|
||||
if (isRunning(c) && workQueue.offer(command)) {
|
||||
int recheck = ctl.get();
|
||||
if (!isRunning(recheck) && remove(command)) {
|
||||
reject(command);
|
||||
} else if (workerCountOf(recheck) == 0) {
|
||||
addWorker(null, false);
|
||||
}
|
||||
} else if (!addWorker(command, false)) {
|
||||
reject(command);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void shutdown() {
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
checkShutdownAccess();
|
||||
advanceRunState(SHUTDOWN);
|
||||
interruptIdleWorkers();
|
||||
onShutdown();
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
tryTerminate();
|
||||
}
|
||||
|
||||
@Override
|
||||
public List<Runnable> shutdownNow() {
|
||||
List<Runnable> tasks;
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
checkShutdownAccess();
|
||||
advanceRunState(STOP);
|
||||
interruptWorkers();
|
||||
tasks = drainQueue();
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
tryTerminate();
|
||||
return tasks;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isShutdown() {
|
||||
return !isRunning(ctl.get());
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isTerminating() {
|
||||
int c = ctl.get();
|
||||
return !isRunning(c) && runStateLessThan(c, TERMINATED);
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isTerminated() {
|
||||
return runStateAtLeast(ctl.get(), TERMINATED);
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean awaitTermination(long timeout, TimeUnit unit)
|
||||
throws InterruptedException {
|
||||
long nanos = unit.toNanos(timeout);
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
for (; ; ) {
|
||||
if (runStateAtLeast(ctl.get(), TERMINATED)) {
|
||||
return true;
|
||||
}
|
||||
if (nanos <= 0) {
|
||||
return false;
|
||||
}
|
||||
nanos = termination.awaitNanos(nanos);
|
||||
}
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void finalize() {
|
||||
SecurityManager sm = System.getSecurityManager();
|
||||
if (sm == null || acc == null) {
|
||||
shutdown();
|
||||
} else {
|
||||
PrivilegedAction<Void> pa = () -> {
|
||||
shutdown();
|
||||
return null;
|
||||
};
|
||||
AccessController.doPrivileged(pa, acc);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setThreadFactory(ThreadFactory threadFactory) {
|
||||
if (threadFactory == null) {
|
||||
throw new NullPointerException();
|
||||
}
|
||||
this.threadFactory = threadFactory;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ThreadFactory getThreadFactory() {
|
||||
return threadFactory;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setRejectedExecutionHandler(RejectedExecutionHandler handler) {
|
||||
if (handler == null) {
|
||||
throw new NullPointerException();
|
||||
}
|
||||
this.handler = handler;
|
||||
}
|
||||
|
||||
@Override
|
||||
public RejectedExecutionHandler getRejectedExecutionHandler() {
|
||||
return handler;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setCorePoolSize(int corePoolSize) {
|
||||
if (corePoolSize < 0) {
|
||||
throw new IllegalArgumentException();
|
||||
}
|
||||
int delta = corePoolSize - this.corePoolSize;
|
||||
this.corePoolSize = corePoolSize;
|
||||
if (workerCountOf(ctl.get()) > corePoolSize) {
|
||||
interruptIdleWorkers();
|
||||
} else if (delta > 0) {
|
||||
int k = Math.min(delta, workQueue.size());
|
||||
while (k-- > 0 && addWorker(null, true)) {
|
||||
if (workQueue.isEmpty()) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getCorePoolSize() {
|
||||
return corePoolSize;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean prestartCoreThread() {
|
||||
return workerCountOf(ctl.get()) < corePoolSize &&
|
||||
addWorker(null, true);
|
||||
}
|
||||
|
||||
@Override
|
||||
public int prestartAllCoreThreads() {
|
||||
int n = 0;
|
||||
while (addWorker(null, true)) {
|
||||
++n;
|
||||
}
|
||||
return n;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean allowsCoreThreadTimeOut() {
|
||||
return allowCoreThreadTimeOut;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void allowCoreThreadTimeOut(boolean value) {
|
||||
if (value && keepAliveTime <= 0) {
|
||||
throw new IllegalArgumentException("Core threads must have nonzero keep alive times");
|
||||
}
|
||||
if (value != allowCoreThreadTimeOut) {
|
||||
allowCoreThreadTimeOut = value;
|
||||
if (value) {
|
||||
interruptIdleWorkers();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setMaximumPoolSize(int maximumPoolSize) {
|
||||
if (maximumPoolSize <= 0 || maximumPoolSize < corePoolSize) {
|
||||
throw new IllegalArgumentException();
|
||||
}
|
||||
this.maximumPoolSize = maximumPoolSize;
|
||||
if (workerCountOf(ctl.get()) > maximumPoolSize) {
|
||||
interruptIdleWorkers();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getMaximumPoolSize() {
|
||||
return maximumPoolSize;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void setKeepAliveTime(long time, TimeUnit unit) {
|
||||
if (time < 0) {
|
||||
throw new IllegalArgumentException();
|
||||
}
|
||||
if (time == 0 && allowsCoreThreadTimeOut()) {
|
||||
throw new IllegalArgumentException("Core threads must have nonzero keep alive times");
|
||||
}
|
||||
long keepAliveTime = unit.toNanos(time);
|
||||
long delta = keepAliveTime - this.keepAliveTime;
|
||||
this.keepAliveTime = keepAliveTime;
|
||||
if (delta < 0) {
|
||||
interruptIdleWorkers();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public long getKeepAliveTime(TimeUnit unit) {
|
||||
return unit.convert(keepAliveTime, TimeUnit.NANOSECONDS);
|
||||
}
|
||||
|
||||
@Override
|
||||
public BlockingQueue<Runnable> getQueue() {
|
||||
return workQueue;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean remove(Runnable task) {
|
||||
boolean removed = workQueue.remove(task);
|
||||
tryTerminate();
|
||||
return removed;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void purge() {
|
||||
final BlockingQueue<Runnable> q = workQueue;
|
||||
try {
|
||||
Iterator<Runnable> it = q.iterator();
|
||||
while (it.hasNext()) {
|
||||
Runnable r = it.next();
|
||||
if (r instanceof Future<?> && ((Future<?>) r).isCancelled()) {
|
||||
it.remove();
|
||||
}
|
||||
}
|
||||
} catch (ConcurrentModificationException fallThrough) {
|
||||
for (Object r : q.toArray()) {
|
||||
if (r instanceof Future<?> && ((Future<?>) r).isCancelled()) {
|
||||
q.remove(r);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
tryTerminate();
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getPoolSize() {
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
return runStateAtLeast(ctl.get(), TIDYING) ? 0
|
||||
: workers.size();
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getActiveCount() {
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
int n = 0;
|
||||
for (Worker w : workers) {
|
||||
if (w.isLocked()) {
|
||||
++n;
|
||||
}
|
||||
}
|
||||
return n;
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getLargestPoolSize() {
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
return largestPoolSize;
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public long getTaskCount() {
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
long n = completedTaskCount;
|
||||
for (Worker w : workers) {
|
||||
n += w.completedTasks;
|
||||
if (w.isLocked()) {
|
||||
++n;
|
||||
}
|
||||
}
|
||||
return n + workQueue.size();
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public long getCompletedTaskCount() {
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
long n = completedTaskCount;
|
||||
for (Worker w : workers) {
|
||||
n += w.completedTasks;
|
||||
}
|
||||
return n;
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
long ncompleted;
|
||||
int nworkers, nactive;
|
||||
final ReentrantLock mainLock = this.mainLock;
|
||||
mainLock.lock();
|
||||
try {
|
||||
ncompleted = completedTaskCount;
|
||||
nactive = 0;
|
||||
nworkers = workers.size();
|
||||
for (Worker w : workers) {
|
||||
ncompleted += w.completedTasks;
|
||||
if (w.isLocked()) {
|
||||
++nactive;
|
||||
}
|
||||
}
|
||||
} finally {
|
||||
mainLock.unlock();
|
||||
}
|
||||
int c = ctl.get();
|
||||
String rs = (runStateLessThan(c, SHUTDOWN) ? "Running" :
|
||||
(runStateAtLeast(c, TERMINATED) ? "Terminated" :
|
||||
"Shutting down"));
|
||||
return super.toString() +
|
||||
"[" + rs +
|
||||
", pool size = " + nworkers +
|
||||
", active threads = " + nactive +
|
||||
", queued tasks = " + workQueue.size() +
|
||||
", completed tasks = " + ncompleted +
|
||||
"]";
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void beforeExecute(Thread t, Runnable r) {
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void afterExecute(Runnable r, Throwable t) {
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void terminated() {
|
||||
}
|
||||
|
||||
public static class CallerRunsPolicy implements RejectedExecutionHandler {
|
||||
|
||||
public CallerRunsPolicy() {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
|
||||
if (!e.isShutdown()) {
|
||||
r.run();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public static class AbortPolicy implements RejectedExecutionHandler {
|
||||
|
||||
public AbortPolicy() {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
|
||||
throw new RejectedExecutionException("Task " + r.toString() +
|
||||
" rejected from " +
|
||||
e.toString());
|
||||
}
|
||||
}
|
||||
|
||||
public static class DiscardPolicy implements RejectedExecutionHandler {
|
||||
|
||||
public DiscardPolicy() {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
|
||||
}
|
||||
}
|
||||
|
||||
public static class DiscardOldestPolicy implements RejectedExecutionHandler {
|
||||
|
||||
public DiscardOldestPolicy() {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void rejectedExecution(Runnable r, ThreadPoolExecutor e) {
|
||||
if (!e.isShutdown()) {
|
||||
e.getQueue().poll();
|
||||
e.execute(r);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in new issue