/*
* 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.session.helpers;
import org.apache.sshd.common.RuntimeSshException;
import org.apache.sshd.common.io.IoHandler;
import org.apache.sshd.common.io.IoSession;
import org.apache.sshd.common.util.Readable;
import org.apache.sshd.common.util.ValidateUtils;
import org.apache.sshd.common.util.logging.AbstractLoggingBean;
/**
* TODO Add javadoc
*
* @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
*/
public abstract class AbstractSessionIoHandler extends AbstractLoggingBean implements IoHandler {
protected AbstractSessionIoHandler() {
super();
}
@Override
public void sessionCreated(IoSession ioSession) throws Exception {
ValidateUtils.checkNotNull(
createSession(ioSession), "No session created for %s", ioSession);
}
@Override
public void sessionClosed(IoSession ioSession) throws Exception {
AbstractSession session = ValidateUtils.checkNotNull(
AbstractSession.getSession(ioSession), "No abstract session to handle closure of %s", ioSession);
session.close(true);
}
@Override
public void exceptionCaught(IoSession ioSession, Throwable cause) throws Exception {
AbstractSession session = AbstractSession.getSession(ioSession, true);
if (session != null) {
session.exceptionCaught(cause);
} else {
throw new IllegalStateException("No session available", cause);
}
}
@Override
public void messageReceived(IoSession ioSession, Readable message) throws Exception {
AbstractSession session = ValidateUtils.checkNotNull(
AbstractSession.getSession(ioSession), "No abstract session to handle incoming message for %s", ioSession);
try {
session.messageReceived(message);
} catch (Error e) {
if (log.isDebugEnabled()) {
log.debug("messageReceived({}) failed {} to handle message: {}",
ioSession, e.getClass().getSimpleName(), e.getMessage());
}
if (log.isTraceEnabled()) {
log.trace("messageReceived(" + ioSession + ") message handling error details", e);
}
throw new RuntimeSshException(e);
}
}
protected abstract AbstractSession createSession(IoSession ioSession) throws Exception;
}