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RatisHelper.java
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RatisHelper.java
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/*
* 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.ratis;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.ozone.OzoneConfigKeys;
import org.apache.hadoop.ozone.OzoneConsts;
import org.apache.ratis.client.RaftClient;
import org.apache.ratis.conf.RaftProperties;
import org.apache.ratis.grpc.GrpcConfigKeys;
import org.apache.ratis.protocol.RaftGroup;
import org.apache.ratis.protocol.RaftGroupId;
import org.apache.ratis.protocol.RaftPeer;
import org.apache.ratis.protocol.RaftPeerId;
import org.apache.ratis.retry.RetryPolicies;
import org.apache.ratis.retry.RetryPolicy;
import org.apache.ratis.rpc.RpcType;
import org.apache.ratis.thirdparty.com.google.protobuf.ByteString;
import org.apache.ratis.proto.RaftProtos;
import org.apache.ratis.util.SizeInBytes;
import org.apache.ratis.util.TimeDuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
/**
* Ratis helper methods.
*/
public interface RatisHelper {
Logger LOG = LoggerFactory.getLogger(RatisHelper.class);
static String toRaftPeerIdString(DatanodeDetails id) {
return id.getUuidString();
}
static UUID toDatanodeId(String peerIdString) {
return UUID.fromString(peerIdString);
}
static UUID toDatanodeId(RaftPeerId peerId) {
return toDatanodeId(peerId.toString());
}
static UUID toDatanodeId(RaftProtos.RaftPeerProto peerId) {
return toDatanodeId(RaftPeerId.valueOf(peerId.getId()));
}
static String toRaftPeerAddressString(DatanodeDetails id) {
return id.getIpAddress() + ":" +
id.getPort(DatanodeDetails.Port.Name.RATIS).getValue();
}
static RaftPeerId toRaftPeerId(DatanodeDetails id) {
return RaftPeerId.valueOf(toRaftPeerIdString(id));
}
static RaftPeer toRaftPeer(DatanodeDetails id) {
return new RaftPeer(toRaftPeerId(id), toRaftPeerAddressString(id));
}
static List<RaftPeer> toRaftPeers(Pipeline pipeline) {
return toRaftPeers(pipeline.getNodes());
}
static <E extends DatanodeDetails> List<RaftPeer> toRaftPeers(
List<E> datanodes) {
return datanodes.stream().map(RatisHelper::toRaftPeer)
.collect(Collectors.toList());
}
/* TODO: use a dummy id for all groups for the moment.
* It should be changed to a unique id for each group.
*/
RaftGroupId DUMMY_GROUP_ID =
RaftGroupId.valueOf(ByteString.copyFromUtf8("AOzoneRatisGroup"));
RaftGroup EMPTY_GROUP = RaftGroup.valueOf(DUMMY_GROUP_ID,
Collections.emptyList());
static RaftGroup emptyRaftGroup() {
return EMPTY_GROUP;
}
static RaftGroup newRaftGroup(Collection<RaftPeer> peers) {
return peers.isEmpty()? emptyRaftGroup()
: RaftGroup.valueOf(DUMMY_GROUP_ID, peers);
}
static RaftGroup newRaftGroup(RaftGroupId groupId,
Collection<DatanodeDetails> peers) {
final List<RaftPeer> newPeers = peers.stream()
.map(RatisHelper::toRaftPeer)
.collect(Collectors.toList());
return peers.isEmpty() ? RaftGroup.valueOf(groupId, Collections.emptyList())
: RaftGroup.valueOf(groupId, newPeers);
}
static RaftGroup newRaftGroup(Pipeline pipeline) {
return RaftGroup.valueOf(RaftGroupId.valueOf(pipeline.getId().getId()),
toRaftPeers(pipeline));
}
static RaftClient newRaftClient(RpcType rpcType, Pipeline pipeline,
RetryPolicy retryPolicy) throws IOException {
return newRaftClient(rpcType, toRaftPeerId(pipeline.getFirstNode()),
newRaftGroup(RaftGroupId.valueOf(pipeline.getId().getId()),
pipeline.getNodes()), retryPolicy);
}
static RaftClient newRaftClient(RpcType rpcType, RaftPeer leader,
RetryPolicy retryPolicy) {
return newRaftClient(rpcType, leader.getId(),
newRaftGroup(new ArrayList<>(Arrays.asList(leader))), retryPolicy);
}
static RaftClient newRaftClient(RpcType rpcType, RaftPeer leader,
RaftGroup group, RetryPolicy retryPolicy) {
return newRaftClient(rpcType, leader.getId(), group, retryPolicy);
}
static RaftClient newRaftClient(RpcType rpcType, RaftPeerId leader,
RaftGroup group, RetryPolicy retryPolicy) {
LOG.trace("newRaftClient: {}, leader={}, group={}", rpcType, leader, group);
final RaftProperties properties = new RaftProperties();
RaftConfigKeys.Rpc.setType(properties, rpcType);
GrpcConfigKeys.setMessageSizeMax(properties,
SizeInBytes.valueOf(OzoneConsts.OZONE_SCM_CHUNK_MAX_SIZE));
return RaftClient.newBuilder()
.setRaftGroup(group)
.setLeaderId(leader)
.setProperties(properties)
.setRetryPolicy(retryPolicy)
.build();
}
static RetryPolicy createRetryPolicy(Configuration conf) {
int maxRetryCount =
conf.getInt(OzoneConfigKeys.DFS_RATIS_CLIENT_REQUEST_MAX_RETRIES_KEY,
OzoneConfigKeys.
DFS_RATIS_CLIENT_REQUEST_MAX_RETRIES_DEFAULT);
long retryInterval = conf.getTimeDuration(OzoneConfigKeys.
DFS_RATIS_CLIENT_REQUEST_RETRY_INTERVAL_KEY, OzoneConfigKeys.
DFS_RATIS_CLIENT_REQUEST_RETRY_INTERVAL_DEFAULT
.toIntExact(TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS);
TimeDuration sleepDuration =
TimeDuration.valueOf(retryInterval, TimeUnit.MILLISECONDS);
RetryPolicy retryPolicy = RetryPolicies
.retryUpToMaximumCountWithFixedSleep(maxRetryCount, sleepDuration);
return retryPolicy;
}
}