/
ClusterFacade.java
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/
ClusterFacade.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.shardingsphere.cluster.facade;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.apache.shardingsphere.cluster.configuration.config.ClusterConfiguration;
import org.apache.shardingsphere.cluster.heartbeat.ClusterHeartbeatInstance;
import org.apache.shardingsphere.cluster.heartbeat.response.HeartbeatResponse;
import org.apache.shardingsphere.cluster.heartbeat.response.HeartbeatResult;
import org.apache.shardingsphere.cluster.state.ClusterStateInstance;
import org.apache.shardingsphere.cluster.state.DataSourceState;
import org.apache.shardingsphere.cluster.state.InstanceState;
import org.apache.shardingsphere.cluster.state.enums.NodeState;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
/**
* Cluster facade.
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class ClusterFacade {
private ClusterHeartbeatInstance clusterHeartbeatInstance;
private ClusterStateInstance clusterStateInstance;
/**
* Init cluster facade.
*
* @param clusterConfiguration cluster configuration
*/
public void init(final ClusterConfiguration clusterConfiguration) {
Preconditions.checkNotNull(clusterConfiguration, "cluster configuration can not be null.");
clusterHeartbeatInstance = ClusterHeartbeatInstance.getInstance();
clusterHeartbeatInstance.init(clusterConfiguration.getHeartbeat());
clusterStateInstance = ClusterStateInstance.getInstance();
}
/**
* Report heartbeat.
*
* @param heartBeatResponse heartbeat response
*/
public void reportHeartbeat(final HeartbeatResponse heartBeatResponse) {
clusterStateInstance.persistInstanceState(buildInstanceState(heartBeatResponse));
}
private InstanceState buildInstanceState(final HeartbeatResponse heartbeatResponse) {
InstanceState instanceState = clusterStateInstance.loadInstanceState();
return new InstanceState(instanceState.getState(), buildDataSourceStateMap(instanceState, heartbeatResponse));
}
private Map<String, DataSourceState> buildDataSourceStateMap(final InstanceState instanceState, final HeartbeatResponse heartbeatResponse) {
Map<String, DataSourceState> dataSourceStateMap = new HashMap<>();
heartbeatResponse.getHeartbeatResultMap().forEach((key, value) -> buildDataSourceState(key, value, dataSourceStateMap, instanceState));
return dataSourceStateMap;
}
private void buildDataSourceState(final String schemaName, final Collection<HeartbeatResult> heartbeatResults,
final Map<String, DataSourceState> dataSourceStateMap, final InstanceState instanceState) {
heartbeatResults.stream().forEach(each -> {
String dataSourceName = Joiner.on(".").join(schemaName, each.getDataSourceName());
DataSourceState dataSourceState = null == instanceState.getDataSources()
|| null == instanceState.getDataSources().get(dataSourceName) ? new DataSourceState()
: instanceState.getDataSources().get(dataSourceName);
dataSourceState.setState(each.getEnable() ? NodeState.ONLINE : NodeState.OFFLINE);
dataSourceState.setLastConnect(each.getDetectTimeStamp());
dataSourceStateMap.put(dataSourceName, dataSourceState);
});
}
/**
* Get instance.
*
* @return cluster facade instance
*/
public static ClusterFacade getInstance() {
return ClusterFacadeHolder.INSTANCE;
}
private static final class ClusterFacadeHolder {
private static final ClusterFacade INSTANCE = new ClusterFacade();
}
}