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.bookkeeper.metadata.etcd;
  
  import static org.apache.bookkeeper.metadata.etcd.EtcdConstants.LAYOUT_NODE;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.fail;
  
  import java.io.IOException;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bookkeeper.meta.LayoutManager.LedgerLayoutExistsException;
  import org.apache.bookkeeper.meta.LedgerLayout;
  import org.apache.bookkeeper.metadata.etcd.testing.EtcdTestBase;
  import org.apache.commons.lang3.RandomStringUtils;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * Integration test {@link EtcdLayoutManager}.
   */
  @Slf4j
  public class EtcdLayoutManagerTest extends EtcdTestBase {
  
      private static final int managerVersion = 0xabcd;
  
      private String scope;
      private EtcdLayoutManager layoutManager;
  
      @Before
      @Override
      public void setUp() throws Exception {
          super.setUp();
          this.scope = "/" + RandomStringUtils.randomAlphabetic(8);
          this.layoutManager = new EtcdLayoutManager(etcdClient, scope);
          log.info("setup layout manager under scope {}", scope);
      }
  
      @Test
      public void testReadCreateDeleteLayout() throws Exception {
          // layout doesn't exist
          assertNull(layoutManager.readLedgerLayout());
  
          // create the layout
          LedgerLayout layout = new LedgerLayout(
              EtcdLedgerManagerFactory.class.getName(),
              managerVersion
          );
          layoutManager.storeLedgerLayout(layout);
  
          // read the layout
          LedgerLayout readLayout = layoutManager.readLedgerLayout();
          assertEquals(layout, readLayout);
  
          // attempts to create the layout again and it should fail
          LedgerLayout newLayout = new LedgerLayout(
              "new layout",
              managerVersion + 1
          );
          try {
              layoutManager.storeLedgerLayout(newLayout);
              fail("Should fail storeLedgerLayout if layout already exists");
          } catch (LedgerLayoutExistsException e) {
              // expected
          }
  
          // read the layout again (layout should not be changed)
          readLayout = layoutManager.readLedgerLayout();
          assertEquals(layout, readLayout);
  
          // delete the layout
          layoutManager.deleteLedgerLayout();
  
          // the layout should be gone now
          assertNull(layoutManager.readLedgerLayout());
  
          // delete the layout again. it should fail since layout doesn't exist
          try {
              layoutManager.deleteLedgerLayout();
              fail("Should fail deleteLedgerLayout is layout not found");
          } catch (IOException ioe) {
              assertEquals(
                  "No ledger layout is found under '" + scope + "/" + LAYOUT_NODE + "'",
                  ioe.getMessage());
          }
      }
  
  }
  