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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.util.closeable;

import java.util.Collections;
import java.util.Iterator;

import org.apache.sshd.common.Closeable;
import org.apache.sshd.common.future.CloseFuture;
import org.apache.sshd.common.future.SshFutureListener;

/**
 * Waits for a group of {@link Closeable}s to complete in the given order, then signals the completion by setting the
 * "parent" future as closed
 *
 * @author Apache MINA SSHD Project
 */
public class SequentialCloseable extends SimpleCloseable {
    private final Iterable closeables;

    public SequentialCloseable(Object id, Object lock, Iterable closeables) {
        super(id, lock);
        this.closeables = (closeables == null) ? Collections.emptyList() : closeables;
    }

    @Override
    protected void doClose(boolean immediately) {
        Iterator iterator = closeables.iterator();
        SshFutureListener listener = new SshFutureListener() {
            @SuppressWarnings("synthetic-access")
            @Override
            public void operationComplete(CloseFuture previousFuture) {
                boolean traceEnabled = log.isTraceEnabled();
                while (iterator.hasNext()) {
                    Closeable c = iterator.next();
                    if (c != null) {
                        if (traceEnabled) {
                            log.trace("doClose({}) closing {} immediately={}", this, c, immediately);
                        }
                        CloseFuture nextFuture = c.close(immediately);
                        nextFuture.addListener(this);
                        return;
                    }
                }
                if (!iterator.hasNext()) {
                    if (log.isDebugEnabled()) {
                        log.debug("doClose({}) signal close complete immediately={}", this, immediately);
                    }
                    future.setClosed();
                }
            }
        };
        listener.operationComplete(null);
    }
}