/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.impl.nio.reactor;
import java.io.IOException;
import org.apache.http.annotation.Immutable;
import org.apache.http.nio.reactor.IOEventDispatch;
import org.apache.http.nio.reactor.IOSession;
import org.apache.http.nio.reactor.ssl.SSLIOSession;
/**
* Abstract {@link IOEventDispatch} implementation that supports both plain (non-encrypted)
* and SSL encrypted HTTP connections.
*
* @param <T> the connection type.
* @since 4.2
*/
@Immutable // provided injected dependencies are immutable
public abstract class AbstractIODispatch<T> implements IOEventDispatch {
protected abstract T createConnection(IOSession session);
protected abstract void onConnected(T conn);
protected abstract void onClosed(T conn);
protected abstract void onException(T conn, IOException ex);
protected abstract void onInputReady(T conn);
protected abstract void onOutputReady(T conn);
protected abstract void onTimeout(T conn);
private void ensureNotNull(final T conn) {
if (conn == null) {
throw new IllegalStateException("HTTP connection is null");
}
}
public void connected(final IOSession session) {
@SuppressWarnings("unchecked")
T conn = (T) session.getAttribute(IOEventDispatch.CONNECTION_KEY);
try {
if (conn == null) {
conn = createConnection(session);
session.setAttribute(IOEventDispatch.CONNECTION_KEY, conn);
}
onConnected(conn);
SSLIOSession ssliosession = (SSLIOSession) session.getAttribute(
SSLIOSession.SESSION_KEY);
if (ssliosession != null) {
try {
synchronized (ssliosession) {
if (!ssliosession.isInitialized()) {
ssliosession.initialize();
}
}
} catch (IOException ex) {
onException(conn, ex);
ssliosession.shutdown();
}
}
} catch (RuntimeException ex) {
session.shutdown();
throw ex;
}
}
public void disconnected(final IOSession session) {
@SuppressWarnings("unchecked")
T conn = (T) session.getAttribute(IOEventDispatch.CONNECTION_KEY);
if (conn != null) {
onClosed(conn);
}
}
public void inputReady(final IOSession session) {
@SuppressWarnings("unchecked")
T conn = (T) session.getAttribute(IOEventDispatch.CONNECTION_KEY);
try {
ensureNotNull(conn);
SSLIOSession ssliosession = (SSLIOSession) session.getAttribute(
SSLIOSession.SESSION_KEY);
if (ssliosession == null) {
onInputReady(conn);
} else {
try {
if (!ssliosession.isInitialized()) {
ssliosession.initialize();
}
if (ssliosession.isAppInputReady()) {
onInputReady(conn);
}
ssliosession.inboundTransport();
} catch (IOException ex) {
onException(conn, ex);
ssliosession.shutdown();
}
}
} catch (RuntimeException ex) {
session.shutdown();
throw ex;
}
}
public void outputReady(final IOSession session) {
@SuppressWarnings("unchecked")
T conn = (T) session.getAttribute(IOEventDispatch.CONNECTION_KEY);
try {
ensureNotNull(conn);
SSLIOSession ssliosession = (SSLIOSession) session.getAttribute(
SSLIOSession.SESSION_KEY);
if (ssliosession == null) {
onOutputReady(conn);
} else {
try {
if (!ssliosession.isInitialized()) {
ssliosession.initialize();
}
if (ssliosession.isAppOutputReady()) {
onOutputReady(conn);
}
ssliosession.outboundTransport();
} catch (IOException ex) {
onException(conn, ex);
ssliosession.shutdown();
}
}
} catch (RuntimeException ex) {
session.shutdown();
throw ex;
}
}
public void timeout(final IOSession session) {
@SuppressWarnings("unchecked")
T conn = (T) session.getAttribute(IOEventDispatch.CONNECTION_KEY);
try {
SSLIOSession ssliosession = (SSLIOSession) session.getAttribute(
SSLIOSession.SESSION_KEY);
ensureNotNull(conn);
onTimeout(conn);
if (ssliosession != null) {
synchronized (ssliosession) {
if (ssliosession.isOutboundDone() && !ssliosession.isInboundDone()) {
// The session failed to terminate cleanly
ssliosession.shutdown();
}
}
}
} catch (RuntimeException ex) {
session.shutdown();
throw ex;
}
}
}