/*
* 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.servlet.core;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.MetricsHandler;
import io.undertow.servlet.api.Deployment;
import io.undertow.servlet.api.MetricsCollector;
import io.undertow.servlet.api.ServletInfo;
import io.undertow.servlet.handlers.ServletHandler;
import io.undertow.servlet.handlers.ServletRequestContext;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* @author Tomaz Cerar (c) 2014 Red Hat Inc.
*/
class MetricsChainHandler implements HttpHandler {
private final HttpHandler next;
private final Map<String, MetricsHandler> servletHandlers;
public MetricsChainHandler(HttpHandler next, MetricsCollector collector, Deployment deployment) {
this.next = next;
final Map<String, MetricsHandler> servletHandlers = new HashMap<>();
for(Map.Entry<String, ServletHandler> entry : deployment.getServlets().getServletHandlers().entrySet()) {
MetricsHandler handler = new MetricsHandler(next);
servletHandlers.put(entry.getKey(), handler);
collector.registerMetric(entry.getKey(), handler);
}
this.servletHandlers = Collections.unmodifiableMap(servletHandlers);
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
ServletRequestContext context = exchange.getAttachment(ServletRequestContext.ATTACHMENT_KEY);
ServletInfo servletInfo = context.getCurrentServlet().getManagedServlet().getServletInfo();
MetricsHandler handler = servletHandlers.get(servletInfo.getName());
if(handler != null) {
handler.handleRequest(exchange);
} else {
next.handleRequest(exchange);
}
}
}