io.undertow.server.handlers.AttachmentHandler Maven / Gradle / Ivy
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* 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;
import io.undertow.Handlers;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.AttachmentKey;
/**
* Handler that adds an attachment to the request
*
* @author Stuart Douglas
*/
public class AttachmentHandler implements HttpHandler {
private final AttachmentKey key;
private volatile T instance;
private volatile HttpHandler next;
public AttachmentHandler(final AttachmentKey key, final HttpHandler next, final T instance) {
this.next = next;
this.key = key;
this.instance = instance;
}
public AttachmentHandler(final AttachmentKey key, final HttpHandler next) {
this(key, next, null);
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
exchange.putAttachment(key, instance);
next.handleRequest(exchange);
}
public T getInstance() {
return instance;
}
public void setInstance(final T instance) {
this.instance = instance;
}
public HttpHandler getNext() {
return next;
}
public void setNext(final HttpHandler next) {
Handlers.handlerNotNull(next);
this.next = next;
}
}