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Apache ZooKeeper 3.7.0 Server Source Code
Apache ZooKeeper is an open-source server which enables highly reliable distributed coordination.
Apache ZooKeeper Server Source Code files are provided in the source packge (apache-zookeeper-3.7.0.tar.gz). You can download it at Apache ZooKeeper Website.
You can also browse Apache ZooKeeper Server Source Code below:
✍: FYIcenter.com
⏎ org/apache/zookeeper/server/util/LogChopper.java
/* * 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.zookeeper.server.util; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.EOFException; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.zip.Adler32; import java.util.zip.Checksum; import org.apache.jute.BinaryInputArchive; import org.apache.jute.BinaryOutputArchive; import org.apache.jute.Record; import org.apache.yetus.audience.InterfaceAudience; import org.apache.zookeeper.server.ExitCode; import org.apache.zookeeper.server.TxnLogEntry; import org.apache.zookeeper.server.persistence.FileHeader; import org.apache.zookeeper.server.persistence.FileTxnLog; import org.apache.zookeeper.txn.TxnHeader; import org.apache.zookeeper.util.ServiceUtils; /** * this class will chop the log at the specified zxid */ @InterfaceAudience.Public public class LogChopper { public static void main(String[] args) { ExitCode rc = ExitCode.INVALID_INVOCATION; if (args.length != 3) { System.out.println("Usage: LogChopper zxid_to_chop_to txn_log_to_chop chopped_filename"); System.out.println(" this program will read the txn_log_to_chop file and copy all the transactions"); System.out.println(" from it up to (and including) the given zxid into chopped_filename."); ServiceUtils.requestSystemExit(rc.getValue()); } String txnLog = args[1]; String choppedLog = args[2]; try (InputStream is = new BufferedInputStream(new FileInputStream(txnLog)); OutputStream os = new BufferedOutputStream(new FileOutputStream(choppedLog))) { long zxid = Long.decode(args[0]); if (chop(is, os, zxid)) { rc = ExitCode.EXECUTION_FINISHED; } } catch (Exception e) { System.out.println("Got exception: " + e.getMessage()); } ServiceUtils.requestSystemExit(rc.getValue()); } public static boolean chop(InputStream is, OutputStream os, long zxid) throws IOException { BinaryInputArchive logStream = BinaryInputArchive.getArchive(is); BinaryOutputArchive choppedStream = BinaryOutputArchive.getArchive(os); FileHeader fhdr = new FileHeader(); fhdr.deserialize(logStream, "fileheader"); if (fhdr.getMagic() != FileTxnLog.TXNLOG_MAGIC) { System.err.println("Invalid magic number in txn log file"); return false; } System.out.println("ZooKeeper Transactional Log File with dbid " + fhdr.getDbid() + " txnlog format version " + fhdr.getVersion()); fhdr.serialize(choppedStream, "fileheader"); int count = 0; boolean hasZxid = false; long previousZxid = -1; while (true) { long crcValue; byte[] bytes; try { crcValue = logStream.readLong("crcvalue"); bytes = logStream.readBuffer("txnEntry"); } catch (EOFException e) { System.out.println("EOF reached after " + count + " txns."); // returning false because nothing was chopped return false; } if (bytes.length == 0) { // Since we preallocate, we define EOF to be an // empty transaction System.out.println("EOF reached after " + count + " txns."); // returning false because nothing was chopped return false; } Checksum crc = new Adler32(); crc.update(bytes, 0, bytes.length); if (crcValue != crc.getValue()) { throw new IOException("CRC doesn't match " + crcValue + " vs " + crc.getValue()); } TxnLogEntry entry = SerializeUtils.deserializeTxn(bytes); TxnHeader hdr = entry.getHeader(); Record txn = entry.getTxn(); if (logStream.readByte("EOR") != 'B') { System.out.println("Last transaction was partial."); throw new EOFException("Last transaction was partial."); } final long txnZxid = hdr.getZxid(); if (txnZxid == zxid) { hasZxid = true; } // logging the gap to make the inconsistency investigation easier if (previousZxid != -1 && txnZxid != previousZxid + 1) { long txnEpoch = ZxidUtils.getEpochFromZxid(txnZxid); long txnCounter = ZxidUtils.getCounterFromZxid(txnZxid); long previousEpoch = ZxidUtils.getEpochFromZxid(previousZxid); if (txnEpoch == previousEpoch) { System.out.println(String.format("There is intra-epoch gap between %x and %x", previousZxid, txnZxid)); } else if (txnCounter != 1) { System.out.println(String.format("There is inter-epoch gap between %x and %x", previousZxid, txnZxid)); } } previousZxid = txnZxid; if (txnZxid > zxid) { if (count == 0 || !hasZxid) { System.out.println(String.format("This log does not contain zxid %x", zxid)); return false; } System.out.println(String.format("Chopping at %x new log has %d records", zxid, count)); return true; } choppedStream.writeLong(crcValue, "crcvalue"); choppedStream.writeBuffer(bytes, "txnEntry"); choppedStream.writeByte((byte) 'B', "EOR"); count++; } } }
⏎ org/apache/zookeeper/server/util/LogChopper.java
Or download all of them as a single archive file:
File name: zookeeper-server-3.7.0-fyi.zip File size: 871011 bytes Release date: 2021-05-17 Download
⇒ Apache ZooKeeper 3.7.0 Jute Source Code
⇐ Download Apache ZooKeeper 3.7.0 Source Package
2022-11-16, 14334👍, 0💬
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