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+package com.huojutech.sharding.algorithm;
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+
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+import java.sql.Timestamp;
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+import java.util.ArrayList;
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+import java.util.Calendar;
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+import java.util.Collection;
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+import java.util.Iterator;
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+import java.util.List;
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+
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+import groovy.util.logging.Slf4j;
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+import io.shardingsphere.core.api.algorithm.sharding.ListShardingValue;
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+import io.shardingsphere.core.api.algorithm.sharding.PreciseShardingValue;
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+import io.shardingsphere.core.api.algorithm.sharding.RangeShardingValue;
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+import io.shardingsphere.core.api.algorithm.sharding.ShardingValue;
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+import io.shardingsphere.core.api.algorithm.sharding.standard.RangeShardingAlgorithm;
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+
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+@Slf4j
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+public class RangeTableShardingAlgorithm implements RangeShardingAlgorithm<String> {
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+
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+
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+ public Collection<String> doSharding(Collection<String> availableTargetNames,
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+ Collection<ShardingValue> shardingValues) {
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+
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+ Collection<Object> orderCodeValues = getShardingValue(shardingValues, "order_code");
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+ Collection<Object> dateValues = getShardingValue(shardingValues, "gmt_create");
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+ List<String> shardingSuffix = new ArrayList<>();
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+
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+ /**例如:根据user_id + order_id 双分片键来进行分表*/
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+ //Set<List<Integer>> valueResult = Sets.cartesianProduct(userIdValues, orderIdValues);
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+ for (Object orderCode : orderCodeValues) {
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+ long code = Long.parseLong(((String)orderCode).substring(16, 20));
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+
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+ for (Object date : dateValues) {
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+ Timestamp timestamp = (Timestamp)date;
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+ Calendar calendar = Calendar.getInstance();
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+ calendar.setTimeInMillis(timestamp.getTime());
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+ int year = calendar.get(Calendar.YEAR);
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+ String suffix = year + "_" + (code&0x001);
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+
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+ availableTargetNames.forEach(x -> {
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+ if (x.endsWith(suffix)) {
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+ shardingSuffix.add(x);
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+ }
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+ });
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+ }
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+ }
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+
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+ return shardingSuffix;
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+ }
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+
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+ private Collection<Object> getShardingValue(Collection<ShardingValue> shardingValues, final String key) {
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+ Collection<Object> valueSet = new ArrayList<>();
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+ Iterator<ShardingValue> iterator = shardingValues.iterator();
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+ while (iterator.hasNext()) {
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+ ShardingValue next = iterator.next();
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+ if (next instanceof ListShardingValue) {
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+ ListShardingValue value = (ListShardingValue) next;
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+ /**例如:根据user_id + order_id 双分片键来进行分表*/
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+ if (value.getColumnName().equals(key)) {
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+ return value.getValues();
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+ }
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+ }
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+ }
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+ return valueSet;
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+ }
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+
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+ public String doSharding(Collection<String> availableTargetNames, PreciseShardingValue<String> shardingValue) {
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+ long code = Long.parseLong((shardingValue.getValue()).substring(16, 20));
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+ long year = Long.parseLong((shardingValue.getValue()).substring(0, 4));
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+ String suffix = year + "_" + (code&0x001);
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+
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+ for (String tableName : availableTargetNames) {
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+ if (tableName.endsWith(suffix)) {
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+ return tableName;
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+ }
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+ }
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+ return null;
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+ }
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+
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+ @Override
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+ public Collection<String> doSharding(Collection<String> availableTargetNames,
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+ RangeShardingValue<String> shardingValue) {
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+
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+
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+ return null;
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+ }
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+
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+}
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