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.distributedlog;
  
  import static org.junit.Assert.assertNotNull;
  
  import java.util.concurrent.CompletableFuture;
  import org.apache.distributedlog.api.LogWriter;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Test Cases for RollLogSegments.
   */
  public class TestCancelledRead extends TestDistributedLogBase {
      private static final Logger logger = LoggerFactory.getLogger(TestRollLogSegments.class);
  
      @Test(timeout = 600000)
      public void testWritingAndTailing() throws Exception {
          String name = "writing-and-tailing";
          DistributedLogConfiguration conf = new DistributedLogConfiguration()
              .setReadAheadWaitTime(5000)
              .setOutputBufferSize(0)
              .setCreateStreamIfNotExists(true)
              .setImmediateFlushEnabled(true)
              .setFailFastOnStreamNotReady(true)
              .setPeriodicFlushFrequencyMilliSeconds(0)
              .setLockTimeout(DistributedLogConstants.LOCK_IMMEDIATE)
              .setEnableReadAhead(false)
              .setLogSegmentRollingIntervalMinutes(0);
  
          CompletableFuture<Void> f = new CompletableFuture<>();
          long entryId = 0;
  
          try (BKDistributedLogManager dlm = (BKDistributedLogManager) createNewDLM(conf, name);
               LogWriter writer = dlm.startLogSegmentNonPartitioned()) {
              entryId++;
              writer.write(DLMTestUtil.getLogRecordInstance(entryId, 100000));
          }
  
          try (BKDistributedLogManager dlmReader = (BKDistributedLogManager) createNewDLM(conf, name)) {
              BKAsyncLogReader reader = (BKAsyncLogReader) dlmReader.getAsyncLogReader(DLSN.InitialDLSN);
  
              assertNotNull(reader.readNext().get());
  
              conf.setMaxLogSegmentBytes(1000);
              try (BKDistributedLogManager dlm = (BKDistributedLogManager) createNewDLM(conf, name);
                   LogWriter writer = dlm.startLogSegmentNonPartitioned()) {
                  for (int i = 0; i < 100; i++) {
                      entryId++;
                      writer.write(DLMTestUtil.getLogRecordInstance(entryId, 100));
  
                      assertNotNull(reader.readNext().get());
                  }
              } finally {
                  reader.asyncClose().get();
              }
          }
      }
  }
  