org.apache.bookkeeper.common.router.StringUtf8HashRouter Maven / Gradle / Ivy
/*
* 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.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 {
public static HashRouter 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;
}
}