package evanq.game.concurrent; import java.util.concurrent.Callable; import java.util.concurrent.RunnableFuture; class PromiseTask<V> extends DefaultPromise<V> implements RunnableFuture<V> { static <T> Callable<T> toCallable(Runnable runnable, T result) { return new RunnableAdapter<T>(runnable, result); } /** * 包装 Runnable task,方便给其他线程调用 * * @author Evan cppmain@gmail.com * * @param <T> */ private static final class RunnableAdapter<T> implements Callable<T> { final Runnable task; final T result; RunnableAdapter(Runnable task, T result) { this.task = task; this.result = result; } @Override public T call() { task.run(); return result; } @Override public String toString() { return "Callable(task: " + task + ", result: " + result + ')'; } } protected final Callable<V> task; PromiseTask(EventExecutor executor, Runnable runnable, V result) { this(executor, toCallable(runnable, result)); } PromiseTask(EventExecutor executor, Callable<V> callable) { super(executor); task = callable; } @Override public final int hashCode() { return System.identityHashCode(this); } @Override public final boolean equals(Object obj) { return this == obj; } @Override public void run() { try { if (setUncancellableInternal()) { V result = task.call(); setSuccessInternal(result); } } catch (Throwable e) { setFailureInternal(e); } } @Override public final Promise<V> setFailure(Throwable cause) { throw new IllegalStateException(); } protected final Promise<V> setFailureInternal(Throwable cause) { super.setFailure(cause); return this; } @Override public final boolean tryFailure(Throwable cause) { return false; } protected final boolean tryFailureInternal(Throwable cause) { return super.tryFailure(cause); } @Override public final Promise<V> setSuccess(V result) { throw new IllegalStateException(); } protected final Promise<V> setSuccessInternal(V result) { super.setSuccess(result); return this; } @Override public final boolean trySuccess(V result) { return false; } protected final boolean trySuccessInternal(V result) { return super.trySuccess(result); } @Override public final boolean setUncancellable() { throw new IllegalStateException(); } protected final boolean setUncancellableInternal() { return super.setUncancellable(); } @Override protected StringBuilder toStringBuilder() { StringBuilder buf = super.toStringBuilder(); buf.setCharAt(buf.length() - 1, ','); buf.append(" task: "); buf.append(task); buf.append(')'); return buf; } }