content: package org.apache.bookkeeper.client;
  
  /*
   *
   * 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.
   *
   */
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import io.netty.buffer.UnpooledByteBufAllocator;
  import io.netty.channel.EventLoopGroup;
  import io.netty.channel.nio.NioEventLoopGroup;
  import io.netty.util.concurrent.DefaultThreadFactory;
  import java.util.Map;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.Executors;
  import java.util.concurrent.ScheduledExecutorService;
  import org.apache.bookkeeper.client.BKException.Code;
  import org.apache.bookkeeper.client.BookKeeper.DigestType;
  import org.apache.bookkeeper.client.BookieInfoReader.BookieInfo;
  import org.apache.bookkeeper.common.util.OrderedExecutor;
  import org.apache.bookkeeper.conf.ClientConfiguration;
  import org.apache.bookkeeper.net.BookieId;
  import org.apache.bookkeeper.proto.BookieClient;
  import org.apache.bookkeeper.proto.BookieClientImpl;
  import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GetBookieInfoCallback;
  import org.apache.bookkeeper.proto.BookkeeperProtocol;
  import org.apache.bookkeeper.stats.NullStatsLogger;
  import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * This unit test tests timeout of GetBookieInfo request.
   *
   */
  public class TestGetBookieInfoTimeout extends BookKeeperClusterTestCase {
      private static final Logger LOG = LoggerFactory.getLogger(TestGetBookieInfoTimeout.class);
      DigestType digestType;
      public EventLoopGroup eventLoopGroup;
      public OrderedExecutor executor;
      private ScheduledExecutorService scheduler;
  
      public TestGetBookieInfoTimeout() {
          super(5);
          this.digestType = DigestType.CRC32C;
      }
  
      @Before
      public void setUp() throws Exception {
          super.setUp();
          eventLoopGroup = new NioEventLoopGroup();
  
          executor = OrderedExecutor.newBuilder()
                  .name("BKClientOrderedSafeExecutor")
                  .numThreads(2)
                  .build();
          scheduler = Executors.newSingleThreadScheduledExecutor(
                  new DefaultThreadFactory("BookKeeperClientScheduler"));
      }
  
      @After
      public void tearDown() throws Exception {
          scheduler.shutdown();
          eventLoopGroup.shutdownGracefully();
          executor.shutdown();
      }
  
      @Test
      public void testGetBookieInfoTimeout() throws Exception {
  
          // connect to the bookies and create a ledger
          LedgerHandle writelh = bkc.createLedger(3, 3, digestType, "testPasswd".getBytes());
          String tmp = "Foobar";
          final int numEntries = 10;
          for (int i = 0; i < numEntries; i++) {
              writelh.addEntry(tmp.getBytes());
          }
  
          // set timeout for getBookieInfo to be 2 secs and cause one of the bookies to go to sleep for 3X that time
          ClientConfiguration cConf = new ClientConfiguration();
          cConf.setGetBookieInfoTimeout(2);
          cConf.setReadEntryTimeout(100000); // by default we are using readEntryTimeout for timeouts
  
          final BookieId bookieToSleep = writelh.getLedgerMetadata().getEnsembleAt(0).get(0);
          int sleeptime = cConf.getBookieInfoTimeout() * 3;
          CountDownLatch latch = sleepBookie(bookieToSleep, sleeptime);
          latch.await();
  
          // try to get bookie info from the sleeping bookie. It should fail with timeout error
          BookieClient bc = new BookieClientImpl(cConf, eventLoopGroup, UnpooledByteBufAllocator.DEFAULT, executor,
                  scheduler, NullStatsLogger.INSTANCE, bkc.getBookieAddressResolver());
          long flags = BookkeeperProtocol.GetBookieInfoRequest.Flags.FREE_DISK_SPACE_VALUE
                  | BookkeeperProtocol.GetBookieInfoRequest.Flags.TOTAL_DISK_CAPACITY_VALUE;
  
          class CallbackObj {
              int rc;
              long requested;
              @SuppressWarnings("unused")
              long freeDiskSpace, totalDiskCapacity;
              CountDownLatch latch = new CountDownLatch(1);
              CallbackObj(long requested) {
                  this.requested = requested;
                  this.rc = 0;
                  this.freeDiskSpace = 0L;
                  this.totalDiskCapacity = 0L;
              }
          }
          CallbackObj obj = new CallbackObj(flags);
          bc.getBookieInfo(bookieToSleep, flags, new GetBookieInfoCallback() {
              @Override
              public void getBookieInfoComplete(int rc, BookieInfo bInfo, Object ctx) {
                  CallbackObj obj = (CallbackObj) ctx;
                  obj.rc = rc;
                  if (rc == Code.OK) {
                      if ((obj.requested & BookkeeperProtocol.GetBookieInfoRequest.Flags.FREE_DISK_SPACE_VALUE) != 0) {
                          obj.freeDiskSpace = bInfo.getFreeDiskSpace();
                      }
                      if ((obj.requested & BookkeeperProtocol.GetBookieInfoRequest.Flags.TOTAL_DISK_CAPACITY_VALUE)
                              != 0) {
                          obj.totalDiskCapacity = bInfo.getTotalDiskSpace();
                      }
                  }
                  obj.latch.countDown();
              }
  
          }, obj);
          obj.latch.await();
          if (LOG.isDebugEnabled()) {
              LOG.debug("Return code: " + obj.rc);
          }
          assertTrue("GetBookieInfo failed with unexpected error code: " + obj.rc, obj.rc == Code.TimeoutException);
      }
  
      @Test
      public void testGetBookieInfoWithAllStoppedBookies() throws Exception {
          Map<BookieId, BookieInfo> bookieInfo = bkc.getBookieInfo();
          assertEquals(5, bookieInfo.size());
          stopAllBookies(false);
          bookieInfo = bkc.getBookieInfo();
          assertEquals(0, bookieInfo.size());
      }
  }
  