From cf471466f78da3a1416eb0270d9924cfead24d7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=87=89=E4=B9=8B?= <zhaodong.xzd@alibaba-inc.com>
Date: Wed, 20 Feb 2019 23:08:52 +0800
Subject: [PATCH] create snowflake

---
 .../rule/KeyGeneratorConfiguration.java       | 33 +++++++++++++++
 .../core/constant/KeyGeneratorEnum.java       | 42 +++++++++++++++++++
 .../keygen/leaf/SnowFlakeKeyGenerator.java    | 23 ++++++++++
 3 files changed, 98 insertions(+)
 create mode 100644 sharding-core/src/main/java/io/shardingsphere/api/config/rule/KeyGeneratorConfiguration.java
 create mode 100644 sharding-core/src/main/java/io/shardingsphere/core/constant/KeyGeneratorEnum.java

diff --git a/sharding-core/src/main/java/io/shardingsphere/api/config/rule/KeyGeneratorConfiguration.java b/sharding-core/src/main/java/io/shardingsphere/api/config/rule/KeyGeneratorConfiguration.java
new file mode 100644
index 0000000000000..2e09c052d0204
--- /dev/null
+++ b/sharding-core/src/main/java/io/shardingsphere/api/config/rule/KeyGeneratorConfiguration.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2016-2018 shardingsphere.io.
+ * <p>
+ * Licensed 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.
+ * </p>
+ */
+package io.shardingsphere.api.config.rule;
+
+import io.shardingsphere.core.constant.KeyGeneratorEnum;
+import lombok.Builder;
+import lombok.Data;
+
+/**
+ * @author:zhaodong.xzd
+ * @github https://github.com/Yaccc
+ */
+@Data
+@Builder
+public class KeyGeneratorConfiguration implements RuleConfiguration {
+    private KeyGeneratorEnum keyGeneratorType;
+
+
+}
diff --git a/sharding-core/src/main/java/io/shardingsphere/core/constant/KeyGeneratorEnum.java b/sharding-core/src/main/java/io/shardingsphere/core/constant/KeyGeneratorEnum.java
new file mode 100644
index 0000000000000..49c267452b472
--- /dev/null
+++ b/sharding-core/src/main/java/io/shardingsphere/core/constant/KeyGeneratorEnum.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2016-2018 shardingsphere.io.
+ * <p>
+ * Licensed 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.
+ * </p>
+ */
+package io.shardingsphere.core.constant;
+
+import lombok.RequiredArgsConstructor;
+
+/**
+ * @author:zhaodong.xzd
+ * @github https://github.com/Yaccc
+ */
+@RequiredArgsConstructor
+public enum KeyGeneratorEnum {
+    /**
+     * default snowflake
+     */
+    DEFAULT("default"),
+    /**
+     * leaf snowflake with zookeeper
+     */
+    LEAF_SNOWFLAKE("leaf_snowflake"),
+    /**
+     * leaf segement
+     */
+    LEAF_SEGMENT("leaf_segment");
+
+    private final String typeName;
+
+}
diff --git a/sharding-core/src/main/java/io/shardingsphere/core/keygen/leaf/SnowFlakeKeyGenerator.java b/sharding-core/src/main/java/io/shardingsphere/core/keygen/leaf/SnowFlakeKeyGenerator.java
index 46b815d73728b..36f0212a6987b 100644
--- a/sharding-core/src/main/java/io/shardingsphere/core/keygen/leaf/SnowFlakeKeyGenerator.java
+++ b/sharding-core/src/main/java/io/shardingsphere/core/keygen/leaf/SnowFlakeKeyGenerator.java
@@ -1,7 +1,30 @@
+/*
+ * Copyright 2016-2018 shardingsphere.io.
+ * <p>
+ * Licensed 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.
+ * </p>
+ */
 package io.shardingsphere.core.keygen.leaf;
 
 import io.shardingsphere.core.keygen.KeyGenerator;
 
+/**
+ * snowflake from leaf
+ *
+ * @url https://github.com/Meituan-Dianping/Leaf
+ * @author:zhaodong.xzd
+ *
+ */
 public class SnowFlakeKeyGenerator implements KeyGenerator {
     @Override
     public Number generateKey() {