| /* |
| * 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.hugegraph.pd; |
| |
| import java.util.List; |
| |
| import org.apache.hugegraph.pd.common.PDException; |
| import org.apache.hugegraph.pd.config.PDConfig; |
| import org.apache.hugegraph.pd.grpc.Metapb; |
| import org.apache.hugegraph.pd.meta.ConfigMetaStore; |
| import org.apache.hugegraph.pd.meta.MetadataFactory; |
| import org.apache.hugegraph.pd.raft.RaftEngine; |
| import org.apache.hugegraph.pd.raft.RaftStateListener; |
| |
| import lombok.extern.slf4j.Slf4j; |
| |
| @Slf4j |
| public class ConfigService implements RaftStateListener { |
| |
| private final ConfigMetaStore meta; |
| private PDConfig pdConfig; |
| |
| public ConfigService(PDConfig config) { |
| this.pdConfig = config; |
| config.setConfigService(this); |
| meta = MetadataFactory.newConfigMeta(config); |
| } |
| |
| public Metapb.PDConfig getPDConfig(long version) throws PDException { |
| return this.meta.getPdConfig(version); |
| } |
| |
| public Metapb.PDConfig getPDConfig() throws PDException { |
| return this.meta.getPdConfig(0); |
| } |
| |
| public Metapb.PDConfig setPDConfig(Metapb.PDConfig mConfig) throws PDException { |
| Metapb.PDConfig oldCfg = getPDConfig(); |
| Metapb.PDConfig.Builder builder = oldCfg.toBuilder().mergeFrom(mConfig) |
| .setVersion(oldCfg.getVersion() + 1) |
| .setTimestamp(System.currentTimeMillis()); |
| mConfig = this.meta.setPdConfig(builder.build()); |
| log.info("PDConfig has been modified, new PDConfig is {}", mConfig); |
| updatePDConfig(mConfig); |
| return mConfig; |
| } |
| |
| public List<Metapb.GraphSpace> getGraphSpace(String graphSpaceName) throws PDException { |
| return this.meta.getGraphSpace(graphSpaceName); |
| } |
| |
| public Metapb.GraphSpace setGraphSpace(Metapb.GraphSpace graphSpace) throws PDException { |
| return this.meta.setGraphSpace(graphSpace.toBuilder() |
| .setTimestamp(System.currentTimeMillis()) |
| .build()); |
| } |
| |
| /** |
| * Read the configuration item from the storage and overwrite the global PD Config object |
| * |
| * @return |
| */ |
| public PDConfig loadConfig() { |
| try { |
| Metapb.PDConfig mConfig = this.meta.getPdConfig(0); |
| if (mConfig == null) { |
| mConfig = Metapb.PDConfig.newBuilder() |
| .setPartitionCount(pdConfig.getInitialPartitionCount()) |
| .setShardCount(pdConfig.getPartition().getShardCount()) |
| .setVersion(1) |
| .setTimestamp(System.currentTimeMillis()) |
| .setMaxShardsPerStore( |
| pdConfig.getPartition().getMaxShardsPerStore()) |
| .build(); |
| } |
| if (RaftEngine.getInstance().isLeader()) { |
| this.meta.setPdConfig(mConfig); |
| } |
| pdConfig = updatePDConfig(mConfig); |
| } catch (Exception e) { |
| log.error("ConfigService loadConfig exception {}", e); |
| } |
| return pdConfig; |
| } |
| |
| public synchronized PDConfig updatePDConfig(Metapb.PDConfig mConfig) { |
| log.info("update pd config: mConfig:{}", mConfig); |
| pdConfig.getPartition().setShardCount(mConfig.getShardCount()); |
| pdConfig.getPartition().setTotalCount(mConfig.getPartitionCount()); |
| pdConfig.getPartition().setMaxShardsPerStore(mConfig.getMaxShardsPerStore()); |
| return pdConfig; |
| } |
| |
| public synchronized PDConfig setPartitionCount(int count) { |
| Metapb.PDConfig mConfig = null; |
| try { |
| mConfig = getPDConfig(); |
| mConfig = mConfig.toBuilder().setPartitionCount(count).build(); |
| setPDConfig(mConfig); |
| } catch (PDException e) { |
| log.error("ConfigService exception {}", e); |
| e.printStackTrace(); |
| } |
| return pdConfig; |
| } |
| |
| /** |
| * Meta store |
| * The original partition count is not recommended due to the fact that it may be affected by |
| * partition splitting/merging |
| * |
| * @return partition count of cluster |
| * @throws PDException when io error |
| */ |
| public int getPartitionCount() throws PDException { |
| return getPDConfig().getPartitionCount(); |
| } |
| |
| @Override |
| public void onRaftLeaderChanged() { |
| loadConfig(); |
| } |
| } |