org.apache.sshd.common.util.closeable.FuturesCloseable Maven / Gradle / Ivy
/*
* 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.concurrent.atomic.AtomicInteger;
import org.apache.sshd.common.SshException;
import org.apache.sshd.common.future.DefaultSshFuture;
import org.apache.sshd.common.future.SshFuture;
import org.apache.sshd.common.future.SshFutureListener;
/**
* @param Type of future
* @author Apache MINA SSHD Project
*/
public class FuturesCloseable extends SimpleCloseable {
private final Iterable> futures;
public FuturesCloseable(Object id, Object lock, Iterable> futures) {
super(id, lock);
this.futures = (futures == null) ? Collections.emptyList() : futures;
}
@Override
protected void doClose(boolean immediately) {
if (immediately) {
for (SshFuture f : futures) {
if (f instanceof DefaultSshFuture) {
((DefaultSshFuture) f).setValue(new SshException("Closed"));
}
}
future.setClosed();
} else {
AtomicInteger count = new AtomicInteger(1);
boolean traceEnabled = log.isTraceEnabled();
SshFutureListener listener = f -> {
int pendingCount = count.decrementAndGet();
if (traceEnabled) {
log.trace("doClose(" + immediately + ") complete pending: " + pendingCount);
}
if (pendingCount == 0) {
future.setClosed();
}
};
for (SshFuture f : futures) {
if (f != null) {
int pendingCount = count.incrementAndGet();
if (traceEnabled) {
log.trace("doClose(" + immediately + ") future pending: " + pendingCount);
}
f.addListener(listener);
}
}
listener.operationComplete(null);
}
}
}