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.camel.component.thrift;
  
  import java.io.IOException;
  import java.lang.reflect.InvocationTargetException;
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.net.UnknownHostException;
  
  import javassist.util.proxy.MethodHandler;
  import javassist.util.proxy.Proxy;
  import javassist.util.proxy.ProxyFactory;
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.Processor;
  import org.apache.camel.component.thrift.server.ThriftHsHaServer;
  import org.apache.camel.component.thrift.server.ThriftMethodHandler;
  import org.apache.camel.component.thrift.server.ThriftThreadPoolServer;
  import org.apache.camel.support.DefaultConsumer;
  import org.apache.camel.support.ResourceHelper;
  import org.apache.camel.support.jsse.SSLContextParameters;
  import org.apache.camel.util.ObjectHelper;
  import org.apache.thrift.TProcessor;
  import org.apache.thrift.server.TServer;
  import org.apache.thrift.transport.TNonblockingServerSocket;
  import org.apache.thrift.transport.TSSLTransportFactory;
  import org.apache.thrift.transport.TServerSocket;
  import org.apache.thrift.transport.TTransportException;
  import org.apache.thrift.transport.TZlibTransport;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Represents Thrift server consumer implementation
   */
  public class ThriftConsumer extends DefaultConsumer {
  
      private static final Logger LOG = LoggerFactory.getLogger(ThriftConsumer.class);
  
      private TNonblockingServerSocket asyncServerTransport;
      private TServerSocket syncServerTransport;
      private TServer server;
      private final ThriftConfiguration configuration;
      private final ThriftEndpoint endpoint;
  
      public ThriftConsumer(ThriftEndpoint endpoint, Processor processor, ThriftConfiguration configuration) {
          super(endpoint, processor);
          this.endpoint = endpoint;
          this.configuration = configuration;
      }
  
      @Override
      public boolean isHostedService() {
          return true;
      }
  
      public ThriftConfiguration getConfiguration() {
          return configuration;
      }
  
      @Override
      protected void doStart() throws Exception {
          super.doStart();
          if (server == null) {
              LOG.debug("Starting the Thrift server");
              initializeServer();
              server.serve();
              LOG.info("Thrift server started and listening on port: {}", asyncServerTransport == null
                      ? syncServerTransport.getServerSocket().getLocalPort() : asyncServerTransport.getPort());
          }
      }
  
      @Override
      protected void doStop() throws Exception {
          if (server != null) {
              LOG.debug("Terminating Thrift server");
              server.stop();
              if (ObjectHelper.isNotEmpty(asyncServerTransport)) {
                  asyncServerTransport.close();
                  asyncServerTransport = null;
              }
              if (ObjectHelper.isNotEmpty(syncServerTransport)) {
                  syncServerTransport.close();
                  syncServerTransport = null;
              }
              server.stop();
              server = null;
          }
          super.doStop();
      }
  
      @SuppressWarnings({ "rawtypes", "unchecked" })
      protected void initializeServer() throws TTransportException, IOException {
          Class serverImplementationClass;
          Object serverImplementationInstance;
          Object serverProcessor;
          ProxyFactory serviceProxy = new ProxyFactory();
          MethodHandler methodHandler = new ThriftMethodHandler(this);
  
          try {
              Class serverInterface = ThriftUtils.getServerInterface(endpoint.getServicePackage(), endpoint.getServiceName(),
                      endpoint.isSynchronous(), endpoint.getCamelContext());
              serviceProxy.setInterfaces(new Class[] { serverInterface });
              serverImplementationClass = serviceProxy.createClass();
              serverImplementationInstance = serverImplementationClass.getConstructor().newInstance();
              ((Proxy) serverImplementationInstance).setHandler(methodHandler);
  
              serverProcessor = ThriftUtils.constructServerProcessor(endpoint.getServicePackage(), endpoint.getServiceName(),
                      serverImplementationInstance, endpoint.isSynchronous(),
                      endpoint.getCamelContext());
          } catch (IllegalArgumentException | InstantiationException | IllegalAccessException | InvocationTargetException
                   | NoSuchMethodException | SecurityException e) {
              throw new IllegalArgumentException(
                      "Unable to create server implementation proxy service for " + configuration.getService());
          }
  
          if (configuration.getNegotiationType() == ThriftNegotiationType.SSL && endpoint.isSynchronous()) {
              SSLContextParameters sslParameters = configuration.getSslParameters();
  
              if (sslParameters == null) {
                  throw new IllegalArgumentException(
                          "SSL parameters must be initialized if negotiation type is set to "
                                                     + configuration.getNegotiationType());
              }
  
              ObjectHelper.notNull(sslParameters.getSecureSocketProtocol(), "Security protocol");
              ObjectHelper.notNull(sslParameters.getKeyManagers().getKeyStore().getResource(), "Keystore path");
              ObjectHelper.notNull(sslParameters.getKeyManagers().getKeyStore().getPassword(), "Keystore password");
  
              TSSLTransportFactory.TSSLTransportParameters sslParams;
              sslParams = new TSSLTransportFactory.TSSLTransportParameters(
                      sslParameters.getSecureSocketProtocol(),
                      sslParameters.getCipherSuites() == null
                              ? null
                              : sslParameters.getCipherSuites().getCipherSuite().stream().toArray(String[]::new));
  
              if (ObjectHelper.isNotEmpty(sslParameters.getKeyManagers().getKeyStore().getProvider())
                      && ObjectHelper.isNotEmpty(sslParameters.getKeyManagers().getKeyStore().getType())) {
                  sslParams.setKeyStore(
                          ResourceHelper.resolveResourceAsInputStream(endpoint.getCamelContext(),
                                  sslParameters.getKeyManagers().getKeyStore().getResource()),
                          sslParameters.getKeyManagers().getKeyStore().getPassword(),
                          sslParameters.getKeyManagers().getKeyStore().getProvider(),
                          sslParameters.getKeyManagers().getKeyStore().getType());
              } else {
                  sslParams.setKeyStore(
                          ResourceHelper.resolveResourceAsInputStream(endpoint.getCamelContext(),
                                  sslParameters.getKeyManagers().getKeyStore().getResource()),
                          sslParameters.getKeyManagers().getKeyStore().getPassword());
              }
  
              try {
                  syncServerTransport = TSSLTransportFactory.getServerSocket(configuration.getPort(),
                          configuration.getClientTimeout(), InetAddress.getByName(configuration.getHost()),
                          sslParams);
              } catch (UnknownHostException e) {
                  throw new IllegalArgumentException("Unknown host defined: " + configuration.getHost());
              }
              ThriftThreadPoolServer.Args args = new ThriftThreadPoolServer.Args(syncServerTransport);
              args.processor((TProcessor) serverProcessor);
              args.executorService(getEndpoint().getCamelContext().getExecutorServiceManager().newThreadPool(this,
                      getEndpoint().getEndpointUri(), configuration.getPoolSize(),
                      configuration.getMaxPoolSize()));
              args.startThreadPool(getEndpoint().getCamelContext().getExecutorServiceManager().newSingleThreadExecutor(this,
                      "start-" + getEndpoint().getEndpointUri()));
              args.context(endpoint.getCamelContext());
  
              server = new ThriftThreadPoolServer(args);
          } else if (configuration.getCompressionType() == ThriftCompressionType.ZLIB && endpoint.isSynchronous()) {
              if (ObjectHelper.isNotEmpty(configuration.getHost()) && ObjectHelper.isNotEmpty(configuration.getPort())) {
                  LOG.debug("Building sync Thrift server on {}:{}", configuration.getHost(), configuration.getPort());
                  syncServerTransport = new TServerSocket(
                          new InetSocketAddress(configuration.getHost(), configuration.getPort()),
                          configuration.getClientTimeout());
              } else if (ObjectHelper.isEmpty(configuration.getHost()) && ObjectHelper.isNotEmpty(configuration.getPort())) {
                  LOG.debug("Building sync Thrift server on <any address>:{}", configuration.getPort());
                  syncServerTransport = new TServerSocket(configuration.getPort(), configuration.getClientTimeout());
              } else {
                  throw new IllegalArgumentException("No server start properties (host, port) specified");
              }
  
              ThriftThreadPoolServer.Args args = new ThriftThreadPoolServer.Args(syncServerTransport);
              args.processor((TProcessor) serverProcessor);
              args.transportFactory(new TZlibTransport.Factory());
              args.executorService(getEndpoint().getCamelContext().getExecutorServiceManager().newThreadPool(this,
                      getEndpoint().getEndpointUri(), configuration.getPoolSize(),
                      configuration.getMaxPoolSize()));
              args.startThreadPool(getEndpoint().getCamelContext().getExecutorServiceManager().newSingleThreadExecutor(this,
                      "start-" + getEndpoint().getEndpointUri()));
              args.context(endpoint.getCamelContext());
  
              server = new ThriftThreadPoolServer(args);
          } else {
  
              if (ObjectHelper.isNotEmpty(configuration.getHost()) && ObjectHelper.isNotEmpty(configuration.getPort())) {
                  LOG.debug("Building Thrift server on {}:{}", configuration.getHost(), configuration.getPort());
                  asyncServerTransport = new TNonblockingServerSocket(
                          new InetSocketAddress(configuration.getHost(), configuration.getPort()),
                          configuration.getClientTimeout());
              } else if (ObjectHelper.isEmpty(configuration.getHost()) && ObjectHelper.isNotEmpty(configuration.getPort())) {
                  LOG.debug("Building Thrift server on <any address>:{}", configuration.getPort());
                  asyncServerTransport = new TNonblockingServerSocket(configuration.getPort(), configuration.getClientTimeout());
              } else {
                  throw new IllegalArgumentException("No server start properties (host, port) specified");
              }
  
              ThriftHsHaServer.Args args = new ThriftHsHaServer.Args(asyncServerTransport);
              args.processor((TProcessor) serverProcessor);
              args.executorService(getEndpoint().getCamelContext().getExecutorServiceManager().newThreadPool(this,
                      getEndpoint().getEndpointUri(), configuration.getPoolSize(),
                      configuration.getMaxPoolSize()));
              args.startThreadPool(getEndpoint().getCamelContext().getExecutorServiceManager().newSingleThreadExecutor(this,
                      "start-" + getEndpoint().getEndpointUri()));
              args.context(endpoint.getCamelContext());
              server = new ThriftHsHaServer(args);
          }
      }
  
      public boolean process(Exchange exchange, AsyncCallback callback) {
          return doSend(exchange, callback);
      }
  
      private boolean doSend(Exchange exchange, AsyncCallback callback) {
          if (isRunAllowed()) {
              getAsyncProcessor().process(exchange, doneSync -> {
                  if (exchange.getException() != null) {
                      getExceptionHandler().handleException("Error processing exchange", exchange, exchange.getException());
                  }
                  callback.done(doneSync);
              });
              return false;
          } else {
              LOG.warn("Consumer not ready to process exchanges. The exchange {} will be discarded", exchange);
              callback.done(true);
              return true;
          }
      }
  }
  