wildfire chat server source initial submit

2019-03-16 17:04:23 +08:00
parent e59217bd10
commit cab3ca0916
1466 changed files with 528862 additions and 15919 deletions
@@ -0,0 +1,63 @@
+/*
+ * This file is part of the Wildfire Chat package.
+ * (c) Heavyrain2012 <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+package win.liyufan.im;
+
+import java.util.Date;
+
+public class MessageShardingUtil {
+    private static SpinLock mLock = new SpinLock();
+    private static int rotateId = 0;
+    private static int nodeId = 0;
+
+    private static int rotateIdWidth = 15;
+    private static int rotateIdMask = 0x7FFF;
+
+    private static int nodeIdWidth = 6;
+    private static int nodeIdMask = 0x3F;
+
+    private static final long T201801010000 = 1514736000000L;
+
+    public static void setNodeId(int nodeId) {
+        MessageShardingUtil.nodeId = nodeId;
+    }
+
+    /**
+     * ID = timestamp(43) + nodeId(6) + rotateId(15)
+     * 所以时间限制是到2157/5/15（2的42次幂代表的时间 + (2018-1970)）。节点数限制是小于64，每台服务器每毫秒最多发送32768条消息
+     * @return
+     */
+    public static long generateId() {
+        mLock.lock();
+        rotateId = (rotateId + 1)&rotateIdMask;
+        mLock.unLock();
+
+        long id = System.currentTimeMillis() - T201801010000;
+
+
+        id <<= nodeIdWidth;
+        id += (nodeId & nodeIdMask);
+
+        id <<= rotateIdWidth;
+        id += rotateId;
+        return id;
+    }
+
+    public static String getMessageTable(long mid) {
+        if (DBUtil.IsEmbedDB) {
+            return "t_messages";
+        }
+
+        mid >>= (nodeIdWidth + rotateIdWidth);
+        Date date = new Date(mid + T201801010000);
+        int month = date.getMonth();
+        int year = date.getYear();
+        year %= 3;
+        return "t_messages_" + (year * 12 + month);
+    }
+}