io.undertow.server.handlers.proxy.SimpleProxyClientProvider Maven / Gradle / Ivy
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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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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 io.undertow.server.handlers.proxy;
import io.undertow.client.ClientCallback;
import io.undertow.client.ClientConnection;
import io.undertow.client.UndertowClient;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.ServerConnection;
import io.undertow.util.AttachmentKey;
import org.xnio.ChannelListener;
import org.xnio.IoUtils;
import org.xnio.OptionMap;
import java.io.IOException;
import java.net.URI;
import java.nio.channels.Channel;
import java.util.concurrent.TimeUnit;
/**
* Simple proxy client provider. This provider simply proxies to another server, using a a one to one
* connection strategy.
*
* {@link LoadBalancingProxyClient} should be used instead. This proxy client is too simplistic for
* real world use cases, and it not set up to use SSL.
*
* @author Stuart Douglas
*/
@Deprecated
public class SimpleProxyClientProvider implements ProxyClient {
private final URI uri;
private final AttachmentKey clientAttachmentKey = AttachmentKey.create(ClientConnection.class);
private final UndertowClient client;
private static final ProxyTarget TARGET = new ProxyTarget() {};
public SimpleProxyClientProvider(URI uri) {
this.uri = uri;
client = UndertowClient.getInstance();
}
@Override
public ProxyTarget findTarget(HttpServerExchange exchange) {
return TARGET;
}
@Override
public void getConnection(ProxyTarget target, HttpServerExchange exchange, ProxyCallback callback, long timeout, TimeUnit timeUnit) {
ClientConnection existing = exchange.getConnection().getAttachment(clientAttachmentKey);
if (existing != null) {
if (existing.isOpen()) {
//this connection already has a client, re-use it
callback.completed(exchange, new ProxyConnection(existing, uri.getPath() == null ? "/" : uri.getPath()));
return;
} else {
exchange.getConnection().removeAttachment(clientAttachmentKey);
}
}
client.connect(new ConnectNotifier(callback, exchange), uri, exchange.getIoThread(), exchange.getConnection().getByteBufferPool(), OptionMap.EMPTY);
}
private final class ConnectNotifier implements ClientCallback {
private final ProxyCallback callback;
private final HttpServerExchange exchange;
private ConnectNotifier(ProxyCallback callback, HttpServerExchange exchange) {
this.callback = callback;
this.exchange = exchange;
}
@Override
public void completed(final ClientConnection connection) {
final ServerConnection serverConnection = exchange.getConnection();
//we attach to the connection so it can be re-used
serverConnection.putAttachment(clientAttachmentKey, connection);
serverConnection.addCloseListener(new ServerConnection.CloseListener() {
@Override
public void closed(ServerConnection serverConnection) {
IoUtils.safeClose(connection);
}
});
connection.getCloseSetter().set(new ChannelListener() {
@Override
public void handleEvent(Channel channel) {
serverConnection.removeAttachment(clientAttachmentKey);
}
});
callback.completed(exchange, new ProxyConnection(connection, uri.getPath() == null ? "/" : uri.getPath()));
}
@Override
public void failed(IOException e) {
callback.failed(exchange);
}
}
}