| /* |
| * 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.io.nio2; |
| |
| import java.io.IOException; |
| import java.net.SocketOption; |
| import java.net.SocketTimeoutException; |
| import java.net.StandardSocketOptions; |
| import java.nio.channels.AsynchronousChannelGroup; |
| import java.nio.channels.NetworkChannel; |
| import java.time.Duration; |
| import java.util.AbstractMap.SimpleImmutableEntry; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.sshd.common.Closeable; |
| import org.apache.sshd.common.Property; |
| import org.apache.sshd.common.PropertyResolver; |
| import org.apache.sshd.common.io.IoHandler; |
| import org.apache.sshd.common.io.IoService; |
| import org.apache.sshd.common.io.IoServiceEventListener; |
| import org.apache.sshd.common.io.IoSession; |
| import org.apache.sshd.common.util.GenericUtils; |
| import org.apache.sshd.common.util.closeable.AbstractInnerCloseable; |
| import org.apache.sshd.core.CoreModuleProperties; |
| |
| /** |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public abstract class Nio2Service extends AbstractInnerCloseable implements IoService { |
| // Note: order may be important so that's why we use a LinkedHashMap |
| public static final Map<Property<?>, SimpleImmutableEntry<SocketOption<?>, Object>> CONFIGURABLE_OPTIONS; |
| |
| static { |
| Map<Property<?>, SimpleImmutableEntry<SocketOption<?>, Object>> map = new LinkedHashMap<>(); |
| map.put(CoreModuleProperties.SOCKET_KEEPALIVE, new SimpleImmutableEntry<>(StandardSocketOptions.SO_KEEPALIVE, null)); |
| map.put(CoreModuleProperties.SOCKET_LINGER, new SimpleImmutableEntry<>(StandardSocketOptions.SO_LINGER, null)); |
| map.put(CoreModuleProperties.SOCKET_RCVBUF, new SimpleImmutableEntry<>(StandardSocketOptions.SO_RCVBUF, null)); |
| map.put(CoreModuleProperties.SOCKET_REUSEADDR, |
| new SimpleImmutableEntry<>(StandardSocketOptions.SO_REUSEADDR, DEFAULT_REUSE_ADDRESS)); |
| map.put(CoreModuleProperties.SOCKET_SNDBUF, new SimpleImmutableEntry<>(StandardSocketOptions.SO_SNDBUF, null)); |
| map.put(CoreModuleProperties.TCP_NODELAY, new SimpleImmutableEntry<>(StandardSocketOptions.TCP_NODELAY, null)); |
| CONFIGURABLE_OPTIONS = Collections.unmodifiableMap(map); |
| } |
| |
| protected final Map<Long, IoSession> sessions; |
| protected final AtomicBoolean disposing = new AtomicBoolean(); |
| protected final PropertyResolver propertyResolver; |
| private final IoHandler handler; |
| private final AsynchronousChannelGroup group; |
| private final ExecutorService executor; |
| private IoServiceEventListener eventListener; |
| |
| protected Nio2Service(PropertyResolver propertyResolver, IoHandler handler, AsynchronousChannelGroup group, |
| ExecutorService resumeTasks) { |
| if (log.isTraceEnabled()) { |
| log.trace("Creating {}", getClass().getSimpleName()); |
| } |
| this.propertyResolver = Objects.requireNonNull(propertyResolver, "No property resolver provided"); |
| this.handler = Objects.requireNonNull(handler, "No I/O handler provided"); |
| this.group = Objects.requireNonNull(group, "No async. channel group provided"); |
| this.executor = Objects.requireNonNull(resumeTasks, "No executor for resuming suspended sessions provided"); |
| this.sessions = new ConcurrentHashMap<>(); |
| } |
| |
| @Override |
| public IoServiceEventListener getIoServiceEventListener() { |
| return eventListener; |
| } |
| |
| @Override |
| public void setIoServiceEventListener(IoServiceEventListener listener) { |
| eventListener = listener; |
| } |
| |
| protected AsynchronousChannelGroup getChannelGroup() { |
| return group; |
| } |
| |
| protected ExecutorService getExecutorService() { |
| return executor; |
| } |
| |
| public IoHandler getIoHandler() { |
| return handler; |
| } |
| |
| public void dispose() { |
| try { |
| if (disposing.getAndSet(true)) { |
| log.warn("dispose({}) already disposing", this); |
| } |
| |
| Duration maxWait = Closeable.getMaxCloseWaitTime(propertyResolver); |
| boolean successful = close(true).await(maxWait); |
| if (!successful) { |
| throw new SocketTimeoutException("Failed to receive closure confirmation within " + maxWait); |
| } |
| } catch (IOException e) { |
| warn("dispose({}) {} while stopping service: {}", |
| this, e.getClass().getSimpleName(), e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| protected Closeable getInnerCloseable() { |
| return builder() |
| .parallel(toString(), sessions.values()) |
| .build(); |
| } |
| |
| @Override |
| public Map<Long, IoSession> getManagedSessions() { |
| return Collections.unmodifiableMap(sessions); |
| } |
| |
| public void sessionClosed(Nio2Session session) { |
| unmapSession(session.getId()); |
| } |
| |
| protected void unmapSession(Long sessionId) { |
| if (sessionId != null) { |
| IoSession ioSession = sessions.remove(sessionId); |
| if (log.isDebugEnabled()) { |
| log.debug("unmapSession(id={}): {}", sessionId, ioSession); |
| } |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected <S extends NetworkChannel> S setSocketOptions(S socket) throws IOException { |
| Collection<? extends SocketOption<?>> supported = socket.supportedOptions(); |
| if (GenericUtils.isEmpty(supported)) { |
| return socket; |
| } |
| |
| for (Map.Entry<Property<?>, ? extends Map.Entry<SocketOption<?>, ?>> ce : CONFIGURABLE_OPTIONS.entrySet()) { |
| Property<?> property = ce.getKey(); |
| Map.Entry<SocketOption<?>, ?> defConfig = ce.getValue(); |
| @SuppressWarnings("rawtypes") |
| SocketOption option = defConfig.getKey(); |
| setOption(socket, property, option, defConfig.getValue()); |
| } |
| |
| return socket; |
| } |
| |
| protected <T> boolean setOption( |
| NetworkChannel socket, Property<?> property, SocketOption<T> option, T defaultValue) |
| throws IOException { |
| String valStr = propertyResolver.getString(property.getName()); |
| T val = defaultValue; |
| if (!GenericUtils.isEmpty(valStr)) { |
| Class<T> type = option.type(); |
| if (type == Integer.class) { |
| val = type.cast(Integer.valueOf(valStr)); |
| } else if (type == Boolean.class) { |
| val = type.cast(Boolean.valueOf(valStr)); |
| } else { |
| throw new IllegalStateException("Unsupported socket option type (" + type + ") " + property + "=" + valStr); |
| } |
| } |
| |
| if (val == null) { |
| return false; |
| } |
| |
| Collection<? extends SocketOption<?>> supported = socket.supportedOptions(); |
| if (GenericUtils.isEmpty(supported) || (!supported.contains(option))) { |
| if (log.isDebugEnabled()) { |
| log.debug("Unsupported socket option ({}) to set using {}={}", option, property, val); |
| } |
| return false; |
| } |
| |
| try { |
| socket.setOption(option, val); |
| if (log.isDebugEnabled()) { |
| log.debug("setOption({})[{}] from property={}", option, val, property); |
| } |
| return true; |
| } catch (IOException | RuntimeException e) { |
| log.warn("setOption({}): unable to set socket option {} via {}={}: {}", socket, option, property, val, |
| e.toString()); |
| return false; |
| } |
| } |
| } |