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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS 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.internal;

import io.netty.util.Recycler;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.concurrent.Promise;

/**
 * Some pending write which should be picked up later.
 */
public final class PendingWrite {
    private static final Recycler RECYCLER = new Recycler() {
        @Override
        protected PendingWrite newObject(Handle handle) {
            return new PendingWrite(handle);
        }
    };

    /**
     * Create a new empty {@link RecyclableArrayList} instance
     */
    public static PendingWrite newInstance(Object msg, Promise promise) {
        PendingWrite pending = RECYCLER.get();
        pending.msg = msg;
        pending.promise = promise;
        return pending;
    }

    private final Recycler.Handle handle;
    private Object msg;
    private Promise promise;

    private PendingWrite(Recycler.Handle handle) {
        this.handle = handle;
    }

    /**
     * Clear and recycle this instance.
     */
    public boolean recycle() {
        msg = null;
        promise = null;
        return RECYCLER.recycle(this, handle);
    }

    /**
     * Fails the underlying {@link Promise} with the given cause and reycle this instance.
     */
    public boolean failAndRecycle(Throwable cause) {
        ReferenceCountUtil.release(msg);
        if (promise != null) {
            promise.setFailure(cause);
        }
        return recycle();
    }

    /**
     * Mark the underlying {@link Promise} successed and reycle this instance.
     */
    public boolean successAndRecycle() {
        if (promise != null) {
            promise.setSuccess(null);
        }
        return recycle();
    }

    public Object msg() {
        return msg;
    }

    public Promise promise() {
        return promise;
    }

    /**
     * Recycle this instance and return the {@link Promise}.
     */
    public Promise recycleAndGet() {
        Promise promise = this.promise;
        recycle();
        return promise;
    }
}