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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.common.router;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.PooledByteBufAllocator;
  
  /**
   * Compute a hash value for a utf8 string.
   */
  public class StringUtf8HashRouter extends AbstractHashRouter<String> {
  
      public static HashRouter<String> of() {
          return ROUTER;
      }
  
      private static final long serialVersionUID = -4630305722027547668L;
  
      private static final StringUtf8HashRouter ROUTER = new StringUtf8HashRouter();
  
      private StringUtf8HashRouter() {
      }
  
      @Override
      public ByteBuf getRoutingKeyData(String key) {
          int keyLen = key.length();
          ByteBuf keyBuf = PooledByteBufAllocator.DEFAULT.buffer(keyLen);
          keyBuf.writeCharSequence(key, UTF_8);
          return keyBuf;
      }
  }
  