Created
October 23, 2021 15:46
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package io.mycat.sqlhandler.config; | |
import io.mycat.config.DatasourceConfig; | |
import io.mycat.config.KVObject; | |
import io.mycat.util.JsonUtil; | |
import io.vertx.core.json.Json; | |
import java.util.*; | |
import java.util.function.Function; | |
import java.util.stream.Collectors; | |
public class DbKVImpl<T extends KVObject> implements KV<T> { | |
final DatasourceConfig datasourceConfig; | |
private String path; | |
final Class aClass; | |
public DbKVImpl(DatasourceConfig datasourceConfig, String path, Class aClass) { | |
this.datasourceConfig = datasourceConfig; | |
this.path = path; | |
this.aClass = aClass; | |
} | |
@Override | |
public Optional<T> get(String key) { | |
Config config = DbStorageManagerImpl.readConfig(datasourceConfig); | |
Map<String, String> stringStringMap = config.config.get(this.path); | |
if (stringStringMap == null) return null; | |
Optional<String> sOptional = Optional.ofNullable(stringStringMap.get(key)); | |
if (sOptional.isPresent()){ | |
String s = sOptional.get(); | |
return Optional.of((T)JsonUtil.from(s, aClass)); | |
} | |
return Optional.empty(); | |
} | |
@Override | |
public void removeKey(String key) { | |
Config config = DbStorageManagerImpl.readConfig(datasourceConfig); | |
Map<String, String> stringStringMap = new HashMap<>(config.config.getOrDefault(this.path, Collections.emptyMap())); | |
stringStringMap.remove(key); | |
config.config.put(this.path,stringStringMap); | |
DbStorageManagerImpl.removeBy(datasourceConfig,config.version); | |
DbStorageManagerImpl.writeString(datasourceConfig, config.config); | |
} | |
@Override | |
public void put(String key, T value) { | |
Config config = DbStorageManagerImpl.readConfig(datasourceConfig); | |
Map<String, String> stringStringMap = new HashMap<>(config.config.getOrDefault(this.path, Collections.emptyMap())); | |
stringStringMap.put(key, Json.encode(value)); | |
config.config.put(this.path,stringStringMap); | |
DbStorageManagerImpl.writeString(datasourceConfig, config.config); | |
} | |
@Override | |
public List<T> values() { | |
Config config = DbStorageManagerImpl.readConfig(datasourceConfig); | |
Map<String, String> stringStringMap = config.config.getOrDefault(this.path, Collections.emptyMap()); | |
return (List) stringStringMap.values().stream().map(i -> JsonUtil.from(i, aClass)).collect(Collectors.toList()); | |
} | |
} |
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