content: /*
   * 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.calcite.avatica.server;
  
  import org.apache.calcite.avatica.remote.Service.RpcMetadataResponse;
  
  import org.eclipse.jetty.server.Handler;
  import org.eclipse.jetty.server.Request;
  import org.eclipse.jetty.server.Server;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.util.Objects;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   * An AvaticaHandler implementation that delegates to a provided Jetty Handler instance.
   *
   * <p>This implementation provides a no-op implementation for
   * {@link #setServerRpcMetadata(org.apache.calcite.avatica.remote.Service.RpcMetadataResponse)}.
   *
   * <p>Does not implement {@link MetricsAwareAvaticaHandler} as this implementation is only presented
   * for backwards compatibility.
   */
  public class DelegatingAvaticaHandler implements AvaticaHandler {
    private static final Logger LOG = LoggerFactory.getLogger(DelegatingAvaticaHandler.class);
  
    private final Handler handler;
  
    public DelegatingAvaticaHandler(Handler handler) {
      this.handler = Objects.requireNonNull(handler);
    }
  
    @Override public void handle(String target, Request baseRequest, HttpServletRequest request,
        HttpServletResponse response) throws IOException, ServletException {
      handler.handle(target, baseRequest, request, response);
    }
  
    @Override public void setServer(Server server) {
      handler.setServer(server);
    }
  
    @Override public Server getServer() {
      return handler.getServer();
    }
  
    @Override public void destroy() {
      handler.destroy();
    }
  
    @Override public void start() throws Exception {
      handler.start();
    }
  
    @Override public void stop() throws Exception {
      handler.stop();
    }
  
    @Override public boolean isRunning() {
      return handler.isRunning();
    }
  
    @Override public boolean isStarted() {
      return handler.isStarted();
    }
  
    @Override public boolean isStarting() {
      return handler.isStarting();
    }
  
    @Override public boolean isStopping() {
      return handler.isStopping();
    }
  
    @Override public boolean isStopped() {
      return handler.isStopped();
    }
  
    @Override public boolean isFailed() {
      return handler.isFailed();
    }
  
    @Override public void addLifeCycleListener(Listener listener) {
      handler.addLifeCycleListener(listener);
    }
  
    @Override public void removeLifeCycleListener(Listener listener) {
      handler.removeLifeCycleListener(listener);
    }
  
    @Override public void setServerRpcMetadata(RpcMetadataResponse metadata) {
      LOG.warn("Setting RpcMetadata is not implemented for DelegatingAvaticaHandler");
    }
  
  }
  
  // End DelegatingAvaticaHandler.java
  