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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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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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 org.apache.sshd.common.future;

import java.io.IOException;
import java.util.Objects;
import java.util.concurrent.CancellationException;

/**
 * A default implementation of a {@link CancelFuture}.
 *
 * @author Apache MINA SSHD Project
 */
public class DefaultCancelFuture extends DefaultSshFuture implements CancelFuture, VerifiableFuture {

    private CancellationException backTrace;

    protected DefaultCancelFuture(Object id) {
        super(id, null);
    }

    /**
     * {@inheritDoc}
     *
     * @return the value of {@link #isCanceled()}
     */
    @Override
    public Boolean verify(long timeoutMillis, CancelOption... options) throws IOException {
        return verifyResult(Boolean.class, timeoutMillis, options);
    }

    @Override
    public void setCanceled() {
        setCanceled(null);
    }

    @Override
    public void setCanceled(Throwable error) {
        synchronized (this) {
            // Normally we create a backtrace right when we create the CancelFuture. If the future doesn't have a
            // backtrace yet, at least record where the future was fulfilled.
            if (backTrace == null) {
                backTrace = new CancellationException("Canceled by framework");
            }
            if (error != null) {
                backTrace.addSuppressed(error);
            }
        }
        setValue(Boolean.TRUE);
    }

    @Override
    public void setNotCanceled() {
        setValue(Boolean.FALSE);
    }

    @Override
    public boolean isCanceled() {
        return Boolean.TRUE.equals(getValue());
    }

    @Override
    public void setBackTrace(CancellationException backTrace) {
        synchronized (this) {
            if (this.backTrace == null) {
                this.backTrace = Objects.requireNonNull(backTrace, "Cancellation backtrace must not be null");
            }
        }
    }

    @Override
    public CancellationException getBackTrace() {
        synchronized (this) {
            return backTrace;
        }
    }
}