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.metadata;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  import java.io.IOException;
  import java.net.URI;
  import org.apache.distributedlog.DistributedLogConfiguration;
  import org.apache.distributedlog.DistributedLogConstants;
  import org.apache.distributedlog.TestZooKeeperClientBuilder;
  import org.apache.distributedlog.ZooKeeperClient;
  import org.apache.distributedlog.ZooKeeperClusterTestCase;
  import org.apache.distributedlog.metadata.DLMetadata;
  import org.apache.distributedlog.util.Utils;
  import org.apache.zookeeper.CreateMode;
  import org.apache.zookeeper.ZooDefs;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  
  
  
  
  
  /**
   * TestZkMetadataResolver.
   */
  public class TestZkMetadataResolver extends ZooKeeperClusterTestCase {
  
      private static final BKDLConfig bkdlConfig = new BKDLConfig("127.0.0.1:7000", "ledgers");
      private static final BKDLConfig bkdlConfig2 = new BKDLConfig("127.0.0.1:7000", "ledgers2");
  
      private ZooKeeperClient zkc;
      private ZkMetadataResolver resolver;
  
      @Before
      public void setup() throws Exception {
          zkc = TestZooKeeperClientBuilder.newBuilder()
                  .uri(createURI("/"))
                  .sessionTimeoutMs(10000)
                  .build();
          resolver = new ZkMetadataResolver(zkc);
      }
  
      @After
      public void tearDown() throws Exception {
          zkc.close();
      }
  
      private URI createURI(String path) {
          return URI.create("distributedlog://127.0.0.1:" + zkPort + path);
      }
  
      @Test(timeout = 60000)
      public void testResolveFailures() throws Exception {
          // resolve unexisted path
          try {
              resolver.resolve(createURI("/unexisted/path"));
              fail("Should fail if no metadata resolved.");
          } catch (IOException e) {
              // expected
          }
          // resolve existed unbound path
          Utils.zkCreateFullPathOptimistic(zkc, "/existed/path", new byte[0],
                  ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
          try {
              resolver.resolve(createURI("/existed/path"));
              fail("Should fail if no metadata resolved.");
          } catch (IOException e) {
              // expected
          }
      }
  
      @Test(timeout = 60000)
      public void testResolve() throws Exception {
          DLMetadata dlMetadata = DLMetadata.create(bkdlConfig);
          dlMetadata.create(createURI("/messaging/distributedlog-testresolve"));
          DLMetadata dlMetadata2 = DLMetadata.create(bkdlConfig2);
          dlMetadata2.create(createURI("/messaging/distributedlog-testresolve/child"));
          assertEquals(dlMetadata,
                  resolver.resolve(createURI("/messaging/distributedlog-testresolve")));
          assertEquals(dlMetadata2,
                  resolver.resolve(createURI("/messaging/distributedlog-testresolve/child")));
          assertEquals(dlMetadata2,
                  resolver.resolve(createURI("/messaging/distributedlog-testresolve/child/unknown")));
          Utils.zkCreateFullPathOptimistic(zkc, "/messaging/distributedlog-testresolve/child/child2", new byte[0],
                  ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
          assertEquals(dlMetadata2,
                  resolver.resolve(createURI("/messaging/distributedlog-testresolve/child/child2")));
      }
  
      @Test(timeout = 60000)
      public void testEncodeRegionID() throws Exception {
          DistributedLogConfiguration dlConf = new DistributedLogConfiguration();
  
          URI uri = createURI("/messaging/distributedlog-testencoderegionid/dl1");
          DLMetadata meta1 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers"));
          meta1.create(uri);
          BKDLConfig read1 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read1, dlConf);
          assertFalse(dlConf.getEncodeRegionIDInLogSegmentMetadata());
  
          BKDLConfig.clearCachedDLConfigs();
  
          DLMetadata meta2 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers").setEncodeRegionID(true));
          meta2.update(uri);
          BKDLConfig read2 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read2, dlConf);
          assertTrue(dlConf.getEncodeRegionIDInLogSegmentMetadata());
  
          BKDLConfig.clearCachedDLConfigs();
  
          DLMetadata meta3 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers").setEncodeRegionID(false));
          meta3.update(uri);
          BKDLConfig read3 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read3, dlConf);
          assertFalse(dlConf.getEncodeRegionIDInLogSegmentMetadata());
  
          BKDLConfig.clearCachedDLConfigs();
      }
  
      @Test(timeout = 60000)
      public void testFirstLogSegmentSequenceNumber() throws Exception {
          DistributedLogConfiguration dlConf = new DistributedLogConfiguration();
  
          URI uri = createURI("/messaging/distributedlog-testfirstledgerseqno/dl1");
          DLMetadata meta1 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers"));
          meta1.create(uri);
          BKDLConfig read1 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read1, dlConf);
          assertEquals(DistributedLogConstants.FIRST_LOGSEGMENT_SEQNO, dlConf.getFirstLogSegmentSequenceNumber());
  
          BKDLConfig.clearCachedDLConfigs();
  
          DLMetadata meta2 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers")
                  .setFirstLogSegmentSeqNo(9999L));
          meta2.update(uri);
          BKDLConfig read2 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read2, dlConf);
          assertEquals(9999L, dlConf.getFirstLogSegmentSequenceNumber());
  
          BKDLConfig.clearCachedDLConfigs();
  
          DLMetadata meta3 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers")
                  .setFirstLogSegmentSeqNo(99L));
          meta3.update(uri);
          BKDLConfig read3 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read3, dlConf);
          assertEquals(99L, dlConf.getFirstLogSegmentSequenceNumber());
  
          BKDLConfig.clearCachedDLConfigs();
      }
  
      @Test(timeout = 60000)
      public void testFederatedNamespace() throws Exception {
          DistributedLogConfiguration dlConf = new DistributedLogConfiguration();
  
          URI uri = createURI("/messaging/distributedlog-testfederatednamespace/dl1");
          DLMetadata meta1 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers"));
          meta1.create(uri);
          BKDLConfig read1 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read1, dlConf);
          assertTrue(dlConf.getCreateStreamIfNotExists());
  
          BKDLConfig.clearCachedDLConfigs();
  
          DLMetadata meta2 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers")
                  .setFederatedNamespace(true));
          meta2.update(uri);
          BKDLConfig read2 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read2, dlConf);
          assertFalse(dlConf.getCreateStreamIfNotExists());
  
          BKDLConfig.clearCachedDLConfigs();
  
          DLMetadata meta3 = DLMetadata.create(new BKDLConfig("127.0.0.1:7000", "ledgers")
                  .setFederatedNamespace(false));
          meta3.update(uri);
          BKDLConfig read3 = BKDLConfig.resolveDLConfig(zkc, uri);
          BKDLConfig.propagateConfiguration(read3, dlConf);
          // if it is non-federated namespace, it won't change the create stream behavior.
          assertFalse(dlConf.getCreateStreamIfNotExists());
  
          BKDLConfig.clearCachedDLConfigs();
      }
  
  }
  