org.apache.bookkeeper.util.LedgerIdFormatter Maven / Gradle / Ivy
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*
* Licensed to the Apache Software Foundation (ASF) under one
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* 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 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();
}
}
}