From d096953776519f10cf99e73b9d019a3c4aa5cabe Mon Sep 17 00:00:00 2001
From: luliqiang <kidgrow>
Date: Wed, 24 Mar 2021 19:07:50 +0800
Subject: [PATCH] 1、完善哈希表后缀生成方法 2、增加哈希表后缀生成工具类（只传入字符串参数，其他参数用方法中的默认值）
---
kidgrow-commons/kidgrow-db-spring-boot-starter/src/main/java/com/kidgrow/db/sharding/HashModTableSuffix.java | 19 +++++++++++++++----
1 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/kidgrow-commons/kidgrow-db-spring-boot-starter/src/main/java/com/kidgrow/db/sharding/HashModTableSuffix.java b/kidgrow-commons/kidgrow-db-spring-boot-starter/src/main/java/com/kidgrow/db/sharding/HashModTableSuffix.java
index 7304b90..f9686b1 100644
--- a/kidgrow-commons/kidgrow-db-spring-boot-starter/src/main/java/com/kidgrow/db/sharding/HashModTableSuffix.java
+++ b/kidgrow-commons/kidgrow-db-spring-boot-starter/src/main/java/com/kidgrow/db/sharding/HashModTableSuffix.java
@@ -13,17 +13,28 @@
public class HashModTableSuffix implements TableSuffix {
private String hash;
- private static final int MOD = 100;
+ private Long tableSize = 128L;
+ private String tableSuffix="_000";
- public HashModTableSuffix(String hash) {
+ public HashModTableSuffix(String hash,long tableSize, String tableSuffix) {
if (StringUtils.isEmpty(hash)) {
throw new IllegalArgumentException("hash should not be null or empty");
+ } else {
+ this.hash = hash;
}
- this.hash = hash;
+ if (tableSize != 0) {
+ this.tableSize = tableSize;
+ }
+ if (!StringUtils.isEmpty(tableSuffix)) {
+ this.tableSuffix=tableSuffix;
+ }
+
}
@Override
public String getSuffix() {
- return String.format("_%d", hash.hashCode() / MOD);
+ String format = "%0" + (tableSuffix.length() - 1) + "d";
+ return tableSuffix.substring(0,1)+String.format(format, Math.abs(hash.hashCode()) % tableSize);
}
+
}
--
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