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.impl;
  
  import static org.apache.distributedlog.impl.ZKLogSegmentFilters.WRITE_HANDLE_FILTER;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import com.google.common.collect.Sets;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import org.apache.distributedlog.DLMTestUtil;
  import org.apache.distributedlog.DistributedLogConstants;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  
  
  
  /**
   * TestZKLogSegmentFilters.
   */
  public class TestZKLogSegmentFilters {
  
      static final Logger LOG = LoggerFactory.getLogger(TestZKLogSegmentFilters.class);
  
      @Test(timeout = 60000)
      public void testWriteFilter() {
          Set<String> expectedFilteredSegments = new HashSet<String>();
          List<String> segments = new ArrayList<String>();
          for (int i = 1; i <= 5; i++) {
              segments.add(DLMTestUtil.completedLedgerZNodeNameWithVersion(i, (i - 1) * 100, i * 100 - 1, i));
          }
          for (int i = 6; i <= 10; i++) {
              String segmentName = DLMTestUtil.completedLedgerZNodeNameWithLogSegmentSequenceNumber(i);
              segments.add(segmentName);
              if (i == 10) {
                  expectedFilteredSegments.add(segmentName);
              }
          }
          for (int i = 11; i <= 15; i++) {
              String segmentName = DLMTestUtil.completedLedgerZNodeNameWithTxID((i - 1) * 100, i * 100 - 1);
              segments.add(segmentName);
              expectedFilteredSegments.add(segmentName);
          }
          segments.add("");
          segments.add("unknown");
          segments.add(DistributedLogConstants.COMPLETED_LOGSEGMENT_PREFIX + "_1234_5678_9");
          expectedFilteredSegments.add(DistributedLogConstants.COMPLETED_LOGSEGMENT_PREFIX + "_1234_5678_9");
          segments.add(DistributedLogConstants.COMPLETED_LOGSEGMENT_PREFIX + "_1_2_3_4_5_6_7_8_9");
          expectedFilteredSegments.add(DistributedLogConstants.COMPLETED_LOGSEGMENT_PREFIX + "_1_2_3_4_5_6_7_8_9");
  
          Collection<String> filteredCollection = WRITE_HANDLE_FILTER.filter(segments);
          LOG.info("Filter log segments {} to {}.", segments, filteredCollection);
          assertEquals(expectedFilteredSegments.size(), filteredCollection.size());
  
          Set<String> filteredSegments = Sets.newHashSet(filteredCollection);
          Sets.SetView<String> diff = Sets.difference(filteredSegments, expectedFilteredSegments);
          assertTrue(diff.isEmpty());
      }
  }
  