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feature: support raft cluster (apache#5226)
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54 changes: 54 additions & 0 deletions
54
common/src/main/java/io/seata/common/metadata/ClusterRole.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| /* | ||
| * Copyright 1999-2019 Seata.io Group. | ||
| * | ||
| * Licensed 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 io.seata.common.metadata; | ||
|
|
||
| /** | ||
| * @author funkye | ||
| */ | ||
| public enum ClusterRole { | ||
|
|
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| /** | ||
| * raft mode leader | ||
| */ | ||
| LEADER(0), | ||
| /** | ||
| * raft mode follower | ||
| */ | ||
| FOLLOWER(1), | ||
| /** | ||
| * raft mode learner | ||
| */ | ||
| LEARNER(2), | ||
| /** | ||
| * cluster mode member | ||
| */ | ||
| MEMBER(3); | ||
|
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| private int roleCode; | ||
|
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| ClusterRole(int roleCode) { | ||
| this.roleCode = roleCode; | ||
| } | ||
|
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| public int getRoleCode() { | ||
| return roleCode; | ||
| } | ||
|
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| public void setRoleCode(int roleCode) { | ||
| this.roleCode = roleCode; | ||
| } | ||
|
|
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| } |
115 changes: 115 additions & 0 deletions
115
common/src/main/java/io/seata/common/metadata/Metadata.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| /* | ||
| * Copyright 1999-2019 Seata.io Group. | ||
| * | ||
| * Licensed 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 io.seata.common.metadata; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.Set; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.ThreadLocalRandom; | ||
|
|
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| import io.seata.common.store.StoreMode; | ||
| import io.seata.common.util.StringUtils; | ||
|
|
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| /** | ||
| * @author funkye | ||
| */ | ||
| public class Metadata { | ||
|
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| private final Map<String/*vgroup*/, Map<String/*raft-group*/, Node>> leaders = new ConcurrentHashMap<>(); | ||
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| private final Map<String/*vgroup*/, Map<String/*raft-group*/, Long/*term*/>> clusterTerm = new ConcurrentHashMap<>(); | ||
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| private final Map<String/*vgroup*/, Map<String/*raft-group*/, List<Node>>> clusterNodes = | ||
| new ConcurrentHashMap<>(); | ||
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| private StoreMode storeMode = StoreMode.FILE; | ||
|
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| public Node getLeader(String clusterName) { | ||
| Map<String/*raft-group*/, Node> map = leaders.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()); | ||
| List<Node> nodes = new ArrayList<>(map.values()); | ||
| return nodes.size() > 0 ? nodes.get(ThreadLocalRandom.current().nextInt(nodes.size())) : null; | ||
| } | ||
|
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| public void setLeaderNode(String clusterName, Node node) { | ||
| String group = node.getGroup(); | ||
| Map<String/*raft-group*/, Node> map = leaders.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()); | ||
| map.put(group, node); | ||
| this.leaders.put(clusterName, map); | ||
| } | ||
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| public List<Node> getNodes(String clusterName, String group) { | ||
| return clusterNodes.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()).get(group); | ||
| } | ||
|
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| public List<Node> getNodes(String clusterName) { | ||
| return clusterNodes.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()).values().stream() | ||
| .flatMap(List::stream).collect(ArrayList::new, ArrayList::add, ArrayList::addAll); | ||
| } | ||
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| public void setNodes(String clusterName, String group, List<Node> nodes) { | ||
| this.clusterNodes.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()).put(group, nodes); | ||
| } | ||
|
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| public boolean containsGroup(String group) { | ||
| return clusterNodes.containsKey(group); | ||
| } | ||
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| public Set<String> groups(String clusterName) { | ||
| return clusterNodes.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()).keySet(); | ||
| } | ||
|
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| public StoreMode getStoreMode() { | ||
| return storeMode; | ||
| } | ||
|
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| public boolean isRaftMode() { | ||
| return Objects.equals(storeMode, StoreMode.RAFT); | ||
| } | ||
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| public void setStoreMode(StoreMode storeMode) { | ||
| this.storeMode = storeMode; | ||
| } | ||
|
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| public Map<String, Long> getClusterTerm(String clusterName) { | ||
| return clusterTerm.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()); | ||
| } | ||
|
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| public void refreshMetadata(String clusterName, MetadataResponse metadataResponse) { | ||
| List<Node> list = new ArrayList<>(); | ||
| for (Node node : metadataResponse.getNodes()) { | ||
| if (node.getRole() == ClusterRole.LEADER) { | ||
| this.setLeaderNode(clusterName, node); | ||
| } | ||
| list.add(node); | ||
| } | ||
| this.storeMode = StoreMode.get(metadataResponse.getStoreMode()); | ||
| if (!list.isEmpty()) { | ||
| String group = list.get(0).getGroup(); | ||
| this.setNodes(clusterName, group, list); | ||
| this.clusterTerm.computeIfAbsent(clusterName, k -> new ConcurrentHashMap<>()).put(group, | ||
| metadataResponse.getTerm()); | ||
| } | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return StringUtils.toString(this); | ||
| } | ||
|
|
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| } |
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