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 org.apache.camel.AsyncCallback;
  import org.apache.camel.AsyncProducer;
  import org.apache.camel.Exchange;
  import org.apache.camel.Message;
  import org.apache.camel.component.thrift.client.AsyncClientMethodCallback;
  import org.apache.camel.support.DefaultAsyncProducer;
  import org.apache.camel.support.ResourceHelper;
  import org.apache.camel.support.jsse.SSLContextParameters;
  import org.apache.camel.util.ObjectHelper;
  import org.apache.thrift.TException;
  import org.apache.thrift.transport.TNonblockingSocket;
  import org.apache.thrift.transport.TNonblockingTransport;
  import org.apache.thrift.transport.TSSLTransportFactory;
  import org.apache.thrift.transport.TSocket;
  import org.apache.thrift.transport.TTransport;
  import org.apache.thrift.transport.TTransportException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Represents asynchronous and synchronous Thrift producer implementations
   */
  public class ThriftProducer extends DefaultAsyncProducer implements AsyncProducer {
  
      private static final Logger LOG = LoggerFactory.getLogger(ThriftProducer.class);
  
      protected final ThriftConfiguration configuration;
      protected final ThriftEndpoint endpoint;
      private TTransport syncTransport;
      private TNonblockingTransport asyncTransport;
      private Object thriftClient;
  
      public ThriftProducer(ThriftEndpoint endpoint, ThriftConfiguration configuration) {
          super(endpoint);
          this.endpoint = endpoint;
          this.configuration = configuration;
      }
  
      @Override
      public boolean process(Exchange exchange, AsyncCallback callback) {
          Message message = exchange.getIn();
  
          try {
              ThriftUtils.invokeAsyncMethod(thriftClient, configuration.getMethod(), message.getBody(),
                      new AsyncClientMethodCallback(exchange, callback));
          } catch (Exception e) {
              if (e.getCause() instanceof TException) {
                  exchange.setException(e.getCause());
              } else {
                  exchange.setException(e);
              }
              callback.done(true);
              return true;
          }
  
          return false;
      }
  
      @Override
      public void process(Exchange exchange) throws Exception {
          Message message = exchange.getIn();
          try {
              Object outBody = ThriftUtils.invokeSyncMethod(thriftClient, configuration.getMethod(), message.getBody());
              exchange.getMessage().setBody(outBody);
          } catch (Exception e) {
              if (e.getCause() instanceof TException) {
                  exchange.setException(e.getCause());
              } else {
                  throw new Exception(e);
              }
          }
      }
  
      @Override
      protected void doStart() throws Exception {
          super.doStart();
  
          if (configuration.getNegotiationType() == ThriftNegotiationType.SSL) {
              if (!endpoint.isSynchronous()) {
                  throw new IllegalArgumentException("The SSL negotiation type requires to set syncronous communication mode");
              }
  
              if (syncTransport == null) {
                  initializeSslTransport();
                  LOG.info("Getting synchronous secured client implementation");
                  thriftClient = ThriftUtils.constructClientInstance(endpoint.getServicePackage(), endpoint.getServiceName(),
                          syncTransport, configuration.getExchangeProtocol(),
                          configuration.getNegotiationType(), configuration.getCompressionType(),
                          endpoint.getCamelContext());
              }
          } else if (endpoint.isSynchronous()) {
              if (syncTransport == null) {
                  initializeSyncTransport();
                  LOG.info("Getting synchronous client implementation");
                  thriftClient = ThriftUtils.constructClientInstance(endpoint.getServicePackage(), endpoint.getServiceName(),
                          syncTransport, configuration.getExchangeProtocol(),
                          configuration.getNegotiationType(), configuration.getCompressionType(),
                          endpoint.getCamelContext());
              }
          } else {
              if (asyncTransport == null) {
                  initializeAsyncTransport();
                  LOG.info("Getting asynchronous client implementation");
                  thriftClient = ThriftUtils.constructAsyncClientInstance(endpoint.getServicePackage(), endpoint.getServiceName(),
                          asyncTransport,
                          configuration.getExchangeProtocol(), endpoint.getCamelContext());
              }
          }
      }
  
      @Override
      protected void doStop() throws Exception {
          if (syncTransport != null) {
              LOG.debug("Terminating synchronous transport the remote Thrift server");
              syncTransport.close();
              syncTransport = null;
          } else if (asyncTransport != null) {
              LOG.debug("Terminating asynchronous transport the remote Thrift server");
              asyncTransport.close();
              asyncTransport = null;
          }
          super.doStop();
      }
  
      protected void initializeSyncTransport() throws TTransportException {
          if (!ObjectHelper.isEmpty(configuration.getHost()) && !ObjectHelper.isEmpty(configuration.getPort())) {
              LOG.info("Creating transport to the remote Thrift server {}:{}", configuration.getHost(), configuration.getPort());
              syncTransport = new TSocket(configuration.getHost(), configuration.getPort());
          } else {
              throw new IllegalArgumentException("No connection properties (host, port) specified");
          }
          syncTransport.open();
      }
  
      protected void initializeAsyncTransport() throws IOException, TTransportException {
          if (!ObjectHelper.isEmpty(configuration.getHost()) && !ObjectHelper.isEmpty(configuration.getPort())) {
              LOG.info("Creating transport to the remote Thrift server {}:{}", configuration.getHost(), configuration.getPort());
              asyncTransport = new TNonblockingSocket(configuration.getHost(), configuration.getPort());
          } else {
              throw new IllegalArgumentException("No connection properties (host, port) specified");
          }
      }
  
      protected void initializeSslTransport() throws TTransportException, IOException {
          if (!ObjectHelper.isEmpty(configuration.getHost()) && !ObjectHelper.isEmpty(configuration.getPort())) {
              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.getTrustManagers().getKeyStore().getResource(), "Trust store path");
              ObjectHelper.notNull(sslParameters.getTrustManagers().getKeyStore().getPassword(), "Trust store password");
  
              LOG.info("Creating secured transport to the remote Thrift server {}:{}", configuration.getHost(),
                      configuration.getPort());
  
              TSSLTransportFactory.TSSLTransportParameters sslParams;
  
              sslParams = new TSSLTransportFactory.TSSLTransportParameters(
                      sslParameters.getSecureSocketProtocol(),
                      sslParameters.getCipherSuites() == null
                              ? null
                              : sslParameters.getCipherSuites().getCipherSuite().stream().toArray(String[]::new));
  
              if (ObjectHelper.isNotEmpty(sslParameters.getTrustManagers().getProvider())
                      && ObjectHelper.isNotEmpty(sslParameters.getTrustManagers().getKeyStore().getType())) {
                  sslParams.setTrustStore(
                          ResourceHelper.resolveResourceAsInputStream(endpoint.getCamelContext(),
                                  sslParameters.getTrustManagers().getKeyStore().getResource()),
                          sslParameters.getTrustManagers().getKeyStore().getPassword(),
                          sslParameters.getTrustManagers().getProvider(),
                          sslParameters.getTrustManagers().getKeyStore().getType());
              } else {
                  sslParams.setTrustStore(sslParameters.getTrustManagers().getKeyStore().getResource(),
                          sslParameters.getTrustManagers().getKeyStore().getPassword());
              }
  
              syncTransport = TSSLTransportFactory.getClientSocket(configuration.getHost(), configuration.getPort(),
                      configuration.getClientTimeout(), sslParams);
          } else {
              throw new IllegalArgumentException("No connection properties (host, port) specified");
          }
      }
  }
  