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.validator;
  
  import java.nio.charset.StandardCharsets;
  import java.util.Collection;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.Endpoint;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.mock.MockEndpoint;
  import org.apache.camel.impl.engine.DefaultResourceLoader;
  import org.apache.camel.spring.boot.CamelAutoConfiguration;
  import org.apache.camel.test.spring.junit5.CamelSpringBootTest;
  import org.apache.camel.urlhandler.pd.Handler;
  import org.junit.jupiter.api.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.context.annotation.Bean;
  import org.springframework.test.annotation.DirtiesContext;
  
  /**
   * Tests whether the ValidatorEndpoint.clearCachedSchema() can be executed when several sender threads are running.
   */
  @DirtiesContext
  @CamelSpringBootTest
  @SpringBootTest(classes = { CamelAutoConfiguration.class, ValidatorEndpointClearCachedSchemaTest.class })
  public class ValidatorEndpointClearCachedSchemaTest extends ContextTestSupport {
  
      private static final Logger LOG = LoggerFactory.getLogger(ValidatorEndpointClearCachedSchemaTest.class);
  
      @Test
      public void testClearCachedSchema() throws Exception {
  
          MockEndpoint mock = context.getEndpoint("mock:result", MockEndpoint.class);
  
          // send with 5 sender threads in parallel and call clear cache in
          // between
          ExecutorService senderPool = Executors.newFixedThreadPool(5);
          ExecutorService executorClearCache = Executors.newFixedThreadPool(1);
          for (int i = 0; i < 5; i++) {
              senderPool.execute(new Sender());
              if (i == 2) {
                  /*
                   * The clear cache thread calls xsdEndpoint.clearCachedSchema
                   */
                  executorClearCache.execute(new ClearCache());
              }
          }
  
          senderPool.shutdown();
          executorClearCache.shutdown();
  
          senderPool.awaitTermination(4, TimeUnit.SECONDS);
  
          // expect at least 5 correct sent messages, the messages sent before
          // the clearCacheSchema method is called will fail with a validation
          // error and will nor result in an exchange
          mock.expectedMinimumMessageCount(5);
          mock.assertIsSatisfied();
      }
  
      @Bean
      protected RouteBuilder createRouteBuilder() throws Exception {
          context.getRegistry().bind(DefaultResourceLoader.RESOURCE_LOADER_KEY_PREFIX + "pd", new Handler());
  
          return new RouteBuilder() {
              @Override
              public void configure() throws Exception {
                  from("direct:start").to("validator:pd:somefile.xsd").convertBodyTo(String.class).to("log:after")
                          .to("mock:result");
  
              }
          };
      }
  
      private class Sender implements Runnable {
  
          private final String message = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + //
                  "<p:TestMessage xmlns:p=\"http://apache.camel.org/test\">" + //
                  "<MessageContent>MessageContent</MessageContent>" + //
                  "</p:TestMessage>";
  
          private final byte[] messageBytes = message.getBytes(StandardCharsets.UTF_8);
  
          @Override
          public void run() {
              // send up to 5 messages
              for (int j = 0; j < 5; j++) {
                  try {
                      Thread.sleep(300);
                  } catch (InterruptedException e) {
                      throw new RuntimeException(e);
                  }
                  template.sendBody("direct:start", messageBytes);
              }
          }
  
      }
  
      private class ClearCache implements Runnable {
  
          @Override
          public void run() {
              try {
                  // start later after the first sender
                  // threads are running
                  Thread.sleep(200);
                  clearCachedSchema();
              } catch (Exception e) {
                  throw new RuntimeException(e);
              }
          }
  
      }
  
      private void clearCachedSchema() throws Exception {
          CamelContext context = this.context;
          if (context == null) {
              return;
          }
          Collection<Endpoint> endpoints = context.getEndpoints();
          for (Endpoint endpoint : endpoints) {
              LOG.info("Endpoint URI: {}", endpoint.getEndpointUri());
              if (endpoint.getEndpointUri().startsWith("validator:")) {
                  ValidatorEndpoint xsltEndpoint = (ValidatorEndpoint) endpoint;
                  xsltEndpoint.clearCachedSchema();
                  LOG.info("schema cache cleared");
              }
          }
      }
  
  }
  