All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.apache.hadoop.hbase.SplitLogTask Maven / Gradle / Ivy

There is a newer version: 3.0.0-beta-1
Show newest version
/*
 * 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.hadoop.hbase;

import java.io.IOException;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.yetus.audience.InterfaceAudience;

import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos;

/**
 * State of a WAL log split during distributed splitting. State is kept up in zookeeper.
 * Encapsulates protobuf serialization/deserialization so we don't leak generated pb outside of this
 * class. Used by regionserver and master packages.
 * 

* Immutable * @deprecated since 2.4.0 and in 3.0.0, to be removed in 4.0.0, replaced by procedure-based * distributed WAL splitter, see SplitWALManager */ @Deprecated @InterfaceAudience.Private public class SplitLogTask { private final ServerName originServer; private final ZooKeeperProtos.SplitLogTask.State state; public static class Unassigned extends SplitLogTask { public Unassigned(final ServerName originServer) { super(originServer, ZooKeeperProtos.SplitLogTask.State.UNASSIGNED); } } public static class Owned extends SplitLogTask { public Owned(final ServerName originServer) { super(originServer, ZooKeeperProtos.SplitLogTask.State.OWNED); } } public static class Resigned extends SplitLogTask { public Resigned(final ServerName originServer) { super(originServer, ZooKeeperProtos.SplitLogTask.State.RESIGNED); } } public static class Done extends SplitLogTask { public Done(final ServerName originServer) { super(originServer, ZooKeeperProtos.SplitLogTask.State.DONE); } } public static class Err extends SplitLogTask { public Err(final ServerName originServer) { super(originServer, ZooKeeperProtos.SplitLogTask.State.ERR); } } SplitLogTask(final ZooKeeperProtos.SplitLogTask slt) { this.originServer = ProtobufUtil.toServerName(slt.getServerName()); this.state = slt.getState(); } SplitLogTask(final ServerName originServer, final ZooKeeperProtos.SplitLogTask.State state) { this.originServer = originServer; this.state = state; } public ServerName getServerName() { return this.originServer; } public boolean isUnassigned(final ServerName sn) { return this.originServer.equals(sn) && isUnassigned(); } public boolean isUnassigned() { return this.state == ZooKeeperProtos.SplitLogTask.State.UNASSIGNED; } public boolean isOwned(final ServerName sn) { return this.originServer.equals(sn) && isOwned(); } public boolean isOwned() { return this.state == ZooKeeperProtos.SplitLogTask.State.OWNED; } public boolean isResigned(final ServerName sn) { return this.originServer.equals(sn) && isResigned(); } public boolean isResigned() { return this.state == ZooKeeperProtos.SplitLogTask.State.RESIGNED; } public boolean isDone(final ServerName sn) { return this.originServer.equals(sn) && isDone(); } public boolean isDone() { return this.state == ZooKeeperProtos.SplitLogTask.State.DONE; } public boolean isErr(final ServerName sn) { return this.originServer.equals(sn) && isErr(); } public boolean isErr() { return this.state == ZooKeeperProtos.SplitLogTask.State.ERR; } @Override public String toString() { return this.state.toString() + " " + this.originServer.toString(); } @Override public boolean equals(Object obj) { if (!(obj instanceof SplitLogTask)) return false; SplitLogTask other = (SplitLogTask) obj; return other.state.equals(this.state) && other.originServer.equals(this.originServer); } @Override public int hashCode() { int hash = 7; hash = 31 * hash + this.state.hashCode(); return 31 * hash + this.originServer.hashCode(); } /** * @param data Serialized date to parse. * @return An SplitLogTaskState instance made of the passed data * @see #toByteArray() */ public static SplitLogTask parseFrom(final byte[] data) throws DeserializationException { ProtobufUtil.expectPBMagicPrefix(data); try { int prefixLen = ProtobufUtil.lengthOfPBMagic(); ZooKeeperProtos.SplitLogTask.Builder builder = ZooKeeperProtos.SplitLogTask.newBuilder(); ProtobufUtil.mergeFrom(builder, data, prefixLen, data.length - prefixLen); return new SplitLogTask(builder.build()); } catch (IOException e) { throw new DeserializationException(Bytes.toStringBinary(data, 0, 64), e); } } /** * @return This instance serialized into a byte array * @see #parseFrom(byte[]) */ public byte[] toByteArray() { // First create a pb ServerName. Then create a ByteString w/ the TaskState // bytes in it. Finally create a SplitLogTaskState passing in the two // pbs just created. HBaseProtos.ServerName snpb = ProtobufUtil.toServerName(this.originServer); ZooKeeperProtos.SplitLogTask slts = ZooKeeperProtos.SplitLogTask.newBuilder().setServerName(snpb).setState(this.state).build(); return ProtobufUtil.prependPBMagic(slts.toByteArray()); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy