| /* |
| * 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.phoenix.queryserver.server.customizers; |
| |
| import static org.apache.hadoop.http.HttpServer2.CONF_CONTEXT_ATTRIBUTE; |
| |
| import org.apache.calcite.avatica.server.ServerCustomizer; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.jmx.JMXJsonServlet; |
| import org.eclipse.jetty.server.Handler; |
| import org.eclipse.jetty.server.Server; |
| import org.eclipse.jetty.server.handler.HandlerList; |
| import org.eclipse.jetty.servlet.ServletContextHandler; |
| import org.eclipse.jetty.servlet.ServletHolder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Arrays; |
| |
| import javax.servlet.Servlet; |
| |
| public class JMXJsonEndpointServerCustomizer implements ServerCustomizer<Server> { |
| private static final Logger LOG = LoggerFactory.getLogger(JMXJsonEndpointServerCustomizer.class); |
| |
| @Override |
| public void customize(Server server) { |
| Handler[] handlers = server.getHandlers(); |
| if (handlers.length != 1) { |
| LOG.warn("Observed handlers on server {}", Arrays.toString(handlers)); |
| throw new IllegalStateException("Expected to find one handler"); |
| } |
| HandlerList list = (HandlerList) handlers[0]; |
| |
| ServletContextHandler ctx = new ServletContextHandler(); |
| ctx.setContextPath("/jmx"); |
| ctx.getServletContext().setAttribute(CONF_CONTEXT_ATTRIBUTE, HBaseConfiguration.create()); |
| |
| Servlet servlet = new JMXJsonServlet(); |
| ServletHolder holder = new ServletHolder(servlet); |
| ctx.addServlet(holder, "/"); |
| |
| Handler[] realHandlers = list.getChildHandlers(); |
| Handler[] newHandlers = new Handler[realHandlers.length + 1]; |
| newHandlers[0] = ctx; |
| System.arraycopy(realHandlers, 0, newHandlers, 1, realHandlers.length); |
| server.setHandler(new HandlerList(newHandlers)); |
| } |
| } |