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.client;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.CompletableFuture;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bookkeeper.client.api.LastConfirmedAndEntry;
  import org.apache.bookkeeper.client.api.LedgerEntries;
  import org.apache.bookkeeper.client.api.LedgerEntry;
  import org.apache.bookkeeper.client.api.LedgerMetadata;
  import org.apache.bookkeeper.client.api.ReadHandle;
  import org.apache.bookkeeper.client.impl.LedgerEntriesImpl;
  import org.apache.bookkeeper.client.impl.LedgerEntryImpl;
  
  
  /**
   * Mock implementation of ReadHandle.
   */
  @Slf4j
  class MockReadHandle implements ReadHandle {
      private final MockBookKeeper bk;
      private final long ledgerId;
      private final LedgerMetadata metadata;
      private final List<LedgerEntryImpl> entries;
  
      MockReadHandle(MockBookKeeper bk, long ledgerId, LedgerMetadata metadata, List<LedgerEntryImpl> entries) {
          this.bk = bk;
          this.ledgerId = ledgerId;
          this.metadata = metadata;
          this.entries = entries;
      }
  
      @Override
      public CompletableFuture<LedgerEntries> readAsync(long firstEntry, long lastEntry) {
          CompletableFuture<LedgerEntries> promise = new CompletableFuture<>();
          if (bk.isStopped()) {
              promise.completeExceptionally(new BKException.BKClientClosedException());
              return promise;
          }
  
          bk.orderedExecutor.chooseThread().execute(() -> {
                  if (bk.getProgrammedFailStatus()) {
                      promise.completeExceptionally(BKException.create(bk.failReturnCode));
                      return;
                  } else if (bk.isStopped()) {
                      promise.completeExceptionally(new BKException.BKClientClosedException());
                      return;
                  }
  
                  if (log.isDebugEnabled()) {
                      log.debug("readEntries: first={} last={} total={}", firstEntry, lastEntry, entries.size());
                  }
                  List<LedgerEntry> seq = new ArrayList<>();
                  long entryId = firstEntry;
                  while (entryId <= lastEntry && entryId < entries.size()) {
                      seq.add(entries.get((int) entryId++).duplicate());
                  }
                  if (log.isDebugEnabled()) {
                      log.debug("Entries read: {}", seq);
                  }
                  promise.complete(LedgerEntriesImpl.create(seq));
              });
          return promise;
  
      }
  
      @Override
      public CompletableFuture<LedgerEntries> readUnconfirmedAsync(long firstEntry, long lastEntry) {
          return readAsync(firstEntry, lastEntry);
      }
  
      @Override
      public CompletableFuture<Long> readLastAddConfirmedAsync() {
          return CompletableFuture.completedFuture(getLastAddConfirmed());
      }
  
      @Override
      public CompletableFuture<Long> tryReadLastAddConfirmedAsync() {
          return readLastAddConfirmedAsync();
      }
  
      @Override
      public long getLastAddConfirmed() {
          return entries.get(entries.size() - 1).getEntryId();
      }
  
      @Override
      public long getLength() {
          long length = 0;
          for (LedgerEntryImpl entry : entries) {
              length += entry.getLength();
          }
  
          return length;
      }
  
      @Override
      public boolean isClosed() {
          return metadata.isClosed();
      }
  
      @Override
      public CompletableFuture<LastConfirmedAndEntry> readLastAddConfirmedAndEntryAsync(long entryId,
                                                                                        long timeOutInMillis,
                                                                                        boolean parallel) {
          CompletableFuture<LastConfirmedAndEntry> promise = new CompletableFuture<>();
          promise.completeExceptionally(new UnsupportedOperationException("Long poll not implemented"));
          return promise;
      }
  
      // Handle interface
      @Override
      public long getId() {
          return ledgerId;
      }
  
      @Override
      public CompletableFuture<Void> closeAsync() {
          return CompletableFuture.completedFuture(null);
      }
  
      @Override
      public LedgerMetadata getLedgerMetadata() {
          return metadata;
      }
  }
  