| /* |
| * |
| * 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.util; |
| |
| import java.util.UUID; |
| |
| import org.apache.bookkeeper.common.util.ReflectionUtils; |
| import org.apache.bookkeeper.conf.AbstractConfiguration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Formatter to format a ledgerId. |
| */ |
| public abstract class LedgerIdFormatter { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(LedgerIdFormatter.class); |
| |
| /** |
| * Formats the LedgerId according to the type of the Formatter and return it |
| * in String format. |
| * |
| * @param ledgerId |
| * @return |
| */ |
| public abstract String formatLedgerId(long ledgerId); |
| |
| /** |
| * converts the ledgeridString, which is in format of the type of formatter, |
| * to the long value. |
| * |
| * @param ledgerIdString |
| * @return |
| */ |
| public abstract long readLedgerId(String ledgerIdString); |
| |
| // Used by BKExtentIdByteArray |
| public static final LedgerIdFormatter LONG_LEDGERID_FORMATTER = new LongLedgerIdFormatter(); |
| |
| public static LedgerIdFormatter newLedgerIdFormatter(AbstractConfiguration<?> conf) { |
| LedgerIdFormatter formatter; |
| try { |
| Class<? extends LedgerIdFormatter> ledgerIdFormatterClass = conf.getLedgerIdFormatterClass(); |
| formatter = ReflectionUtils.newInstance(ledgerIdFormatterClass); |
| } catch (Exception e) { |
| LOG.warn("No formatter class found", e); |
| LOG.warn("Using Default Long Formatter."); |
| formatter = new LongLedgerIdFormatter(); |
| } |
| return formatter; |
| } |
| |
| public static LedgerIdFormatter newLedgerIdFormatter(String opt, AbstractConfiguration conf) { |
| LedgerIdFormatter formatter; |
| if ("hex".equals(opt)) { |
| formatter = new LedgerIdFormatter.HexLedgerIdFormatter(); |
| } else if ("uuid".equals(opt)) { |
| formatter = new LedgerIdFormatter.UUIDLedgerIdFormatter(); |
| } else if ("long".equals(opt)) { |
| formatter = new LedgerIdFormatter.LongLedgerIdFormatter(); |
| } else { |
| LOG.warn("specified unexpected ledgeridformat {}, so default LedgerIdFormatter is used", opt); |
| formatter = newLedgerIdFormatter(conf); |
| } |
| return formatter; |
| } |
| |
| /** |
| * long ledgerId formatter. |
| */ |
| public static class LongLedgerIdFormatter extends LedgerIdFormatter { |
| |
| @Override |
| public String formatLedgerId(long ledgerId) { |
| return Long.toString(ledgerId); |
| } |
| |
| @Override |
| public long readLedgerId(String ledgerIdString) { |
| return Long.parseLong(ledgerIdString.trim()); |
| } |
| } |
| |
| /** |
| * hex ledgerId formatter. |
| */ |
| public static class HexLedgerIdFormatter extends LedgerIdFormatter { |
| |
| @Override |
| public String formatLedgerId(long ledgerId) { |
| return Long.toHexString(ledgerId); |
| } |
| |
| @Override |
| public long readLedgerId(String ledgerIdString) { |
| return Long.valueOf(ledgerIdString.trim(), 16); |
| } |
| } |
| |
| /** |
| * uuid ledgerId formatter. |
| */ |
| public static class UUIDLedgerIdFormatter extends LedgerIdFormatter { |
| |
| @Override |
| public String formatLedgerId(long ledgerId) { |
| return (new UUID(0, ledgerId)).toString(); |
| } |
| |
| @Override |
| public long readLedgerId(String ledgerIdString) { |
| return UUID.fromString(ledgerIdString.trim()).getLeastSignificantBits(); |
| } |
| } |
| } |