perf:动态调度数据库保存

xservice-common/pom.xml

@@ -8,6 +8,7 @@
         <artifactId>xservice-basic</artifactId>
         <version>1.0-SNAPSHOT</version>
     </parent>
+    <version>1.0.2-SNAPSHOT</version>
 
     <artifactId>xservice-common</artifactId>
 

xservice-common/src/main/java/com/xiang/xservice/basic/utils/PrimaryKeyUtils.java

@@ -0,0 +1,65 @@
+package com.xiang.xservice.basic.utils;
+
+
+public class PrimaryKeyUtils {
+    /**
+     * 自定义起始时间戳，例如 2025-01-01
+     */
+    private static final long START_TIMESTAMP = 1735660800000L;
+    private static final long DATA_CENTER_ID_BITS = 5L;
+    private static final long WORKER_ID_BITS = 5L;
+    private static final long SEQUENCE_BITS = 12L;
+
+    private static final long MAX_DATA_CENTER_ID = ~(-1L << DATA_CENTER_ID_BITS);
+    private static final long MAX_WORKER_ID = ~(-1L << WORKER_ID_BITS);
+
+    private static final long WORKER_ID_SHIFT = SEQUENCE_BITS;
+    private static final long DATA_CENTER_ID_SHIFT = SEQUENCE_BITS + WORKER_ID_BITS;
+    private static final long TIMESTAMP_LEFT_SHIFT = SEQUENCE_BITS + WORKER_ID_BITS + DATA_CENTER_ID_BITS;
+
+    private static final long SEQUENCE_MASK = ~(-1L << SEQUENCE_BITS);
+
+    // 可通过配置设置
+    private static final long DATA_CENTER_ID = 1L;
+    private static final long WORKER_ID = 1L;
+
+    private static long sequence = 0L;
+    private static long lastTimestamp = -1L;
+
+    // 分布式下可使用分布式锁替代 synchronized
+    public static synchronized long snowflakeId() {
+        long timestamp = currentTimestamp();
+
+        if (timestamp < lastTimestamp) {
+            throw new RuntimeException("Clock moved backwards. Refusing to generate id");
+        }
+
+        if (timestamp == lastTimestamp) {
+            sequence = (sequence + 1) & SEQUENCE_MASK;
+            if (sequence == 0) {
+                timestamp = waitNextMillis(timestamp);
+            }
+        } else {
+            sequence = 0L;
+        }
+
+        lastTimestamp = timestamp;
+
+        return ((timestamp - START_TIMESTAMP) << TIMESTAMP_LEFT_SHIFT)
+                | (DATA_CENTER_ID << DATA_CENTER_ID_SHIFT)
+                | (WORKER_ID << WORKER_ID_SHIFT)
+                | sequence;
+    }
+
+    private static long waitNextMillis(long currentTimestamp) {
+        long timestamp = currentTimestamp();
+        while (timestamp <= currentTimestamp) {
+            timestamp = currentTimestamp();
+        }
+        return timestamp;
+    }
+
+    private static long currentTimestamp() {
+        return System.currentTimeMillis();
+    }
+}