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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.util.concurrent;

import java.util.concurrent.Callable;
import java.util.concurrent.RunnableFuture;

class PromiseTask extends DefaultPromise implements RunnableFuture {

    static  Callable toCallable(Runnable runnable, T result) {
        return new RunnableAdapter(runnable, result);
    }

    private static final class RunnableAdapter implements Callable {
        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 task;

    PromiseTask(EventExecutor executor, Runnable runnable, V result) {
        this(executor, toCallable(runnable, result));
    }

    PromiseTask(EventExecutor executor, Callable 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 setFailure(Throwable cause) {
        throw new IllegalStateException();
    }

    protected final Promise 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 setSuccess(V result) {
        throw new IllegalStateException();
    }

    protected final Promise 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, ',');

        return buf.append(" task: ")
                  .append(task)
                  .append(')');
    }
}