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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing

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/*
 * 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.geode.management.internal.configuration.handlers;

import java.io.IOException;

import org.apache.geode.distributed.internal.ClusterConfigurationService;
import org.apache.logging.log4j.Logger;

import org.apache.geode.cache.GemFireCache;
import org.apache.geode.distributed.DistributedSystem;
import org.apache.geode.distributed.internal.tcpserver.TcpHandler;
import org.apache.geode.distributed.internal.tcpserver.TcpServer;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.management.internal.configuration.messages.ConfigurationRequest;
import org.apache.geode.management.internal.configuration.messages.ConfigurationResponse;

/***
 * Handler for {@link ConfigurationRequest} request message. Processes the
 * {@link ConfigurationRequest}, sends the {@link ConfigurationResponse} containing the requested
 * configuration.
 *
 */
public class ConfigurationRequestHandler implements TcpHandler {
  private static final Logger logger = LogService.getLogger();

  ClusterConfigurationService sharedConfig;

  public ConfigurationRequestHandler(ClusterConfigurationService sharedConfig) {
    this.sharedConfig = sharedConfig;
  }

  @Override
  public Object processRequest(Object request) throws IOException {
    assert request instanceof ConfigurationRequest;
    try {
      logger.info("Received request for configuration  : {}", request);
      ConfigurationRequest configRequest = (ConfigurationRequest) request;
      return sharedConfig.createConfigurationReponse(configRequest);
    } catch (Exception e) {
      logger.info(e.getMessage(), e);
      return null;
    }
  }

  @Override
  public void endRequest(Object request, long startTime) {}

  @Override
  public void endResponse(Object request, long startTime) {}

  @Override
  public void shutDown() {}

  @Override
  public void init(TcpServer tcpServer) {

  }

  @Override
  public void restarting(DistributedSystem system, GemFireCache cache,
      ClusterConfigurationService sharedConfig) {
    if (sharedConfig != null) {
      this.sharedConfig = sharedConfig;
    }
  }


}