src/META-INF/persistence-template.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 其配置算是标准的JPA配置文件的缩略版 -->
+<persistence>	
+    <!-- 系统基本库 -->
+    <persistence-unit name="demouser">
+        <!-- 为NONE表示不启动缓存，@Cacheable 失效； 非NONE值(通常用ALL)表示开启缓存。 -->
+        <shared-cache-mode>NONE</shared-cache-mode>
+        <properties>
+            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://127.0.0.1:3306/dbuser?characterEncoding=utf8"/>
+            <!-- 
+                javax.persistence.jdbc.driver在JPA的值是JDBC驱动，Redkale有所不同，值应该是javax.sql.DataSource的子类。 
+                为了兼容用户习惯，Redkale内置常见JDBC驱动到javax.sql.DataSource的映射关系：
+                                       com.mysql.jdbc.Driver  ——————  com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource
+                                     org.mariadb.jdbc.Driver  ——————  org.mariadb.jdbc.MySQLDataSource
+                             oracle.jdbc.driver.OracleDriver  ——————  oracle.jdbc.pool.OracleConnectionPoolDataSource
+                com.microsoft.sqlserver.jdbc.SQLServerDriver  ——————  com.microsoft.sqlserver.jdbc.SQLServerConnectionPoolDataSource
+                因此 com.mysql.jdbc.Driver 会被自动转换成 com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource
+            -->
+            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
+            <property name="javax.persistence.jdbc.user" value="root"/>
+            <property name="javax.persistence.jdbc.password" value="123456"/>
+            
+            <!-- 最大连接数，默认值：CPU数*16  -->
+            <property name="javax.persistence.connections.limit" value="32"/>
+            
+            <!--  包含的SQL模板，相当于反向LIKE，不同的JDBC驱动的SQL语句不一样，Redkale内置了MySQL、Oracle、Sqlserver的语句 -->
+            <property name="javax.persistence.contain.sqltemplate" value="LOCATE(${keystr}, ${column}) > 0"/>
+            <property name="javax.persistence.notcontain.sqltemplate" value="LOCATE(${keystr}, ${column}) = 0"/>
+            
+            <!--  复制表结构的SQL模板，Redkale内置了MySQL的语句 -->
+            <property name="javax.persistence.tablenotexist.sqlstate" value="42S02"/>
+            <property name="javax.persistence.tablecopy.sqltemplate" value="CREATE TABLE ${newtable}  LIKE ${oldtable}"/>
+           
+        </properties>
+    </persistence-unit>
+    <!-- IM消息库 -->
+    <persistence-unit name="demoim">
+        <shared-cache-mode>NONE</shared-cache-mode>
+        <properties>
+            <!-- jdbc:mysql://127.0.0.1:3306/dbim?autoReconnect=true&amp;autoReconnectForPools=true&amp;characterEncoding=utf8 -->
+            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://127.0.0.1:3306/dbim?characterEncoding=utf8"/>
+            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
+            <property name="javax.persistence.jdbc.user" value="root"/>
+            <property name="javax.persistence.jdbc.password" value="123456"/>
+        </properties>
+    </persistence-unit>
+</persistence>

src/org/redkale/source/DataDefaultSource.java

@@ -36,6 +36,10 @@ public final class DataDefaultSource implements DataSource, Function<Class, Enti
 
     static final String JDBC_NOTCONTAIN_SQLTEMPLATE = "javax.persistence.notcontain.sqltemplate";
 
+    static final String JDBC_TABLENOTEXIST_SQLSTATE = "javax.persistence.tablenotexist.sqlstate";
+
+    static final String JDBC_TABLECOPY_SQLTEMPLATE = "javax.persistence.tablecopy.sqltemplate";
+
     static final String JDBC_URL = "javax.persistence.jdbc.url";
 
     static final String JDBC_USER = "javax.persistence.jdbc.user";
@@ -329,7 +333,7 @@ public final class DataDefaultSource implements DataSource, Function<Class, Enti
         if (values.length == 0) return;
         try {
             if (!info.isVirtualEntity()) {
-                final String sql = info.insertSQL;
+                final String sql = info.getInsertSQL(values[0]); 
                 final PreparedStatement prestmt = info.autoGenerated
                     ? conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS) : conn.prepareStatement(sql);
                 final Class primaryType = info.getPrimary().type();
@@ -340,7 +344,9 @@ public final class DataDefaultSource implements DataSource, Function<Class, Enti
                 if (distributed && !info.initedPrimaryValue && primaryType.isPrimitive()) { //由DataSource生成主键
                     synchronized (info) {
                         if (!info.initedPrimaryValue) { //初始化最大主键值
+                            try {
                                 Statement stmt = conn.createStatement();
+
                                 ResultSet rs = stmt.executeQuery("SELECT MAX(" + info.getPrimarySQLColumn() + ") FROM " + info.getTable(values[0]));
                                 if (rs.next()) {
                                     if (primaryType == int.class) {
@@ -353,6 +359,9 @@ public final class DataDefaultSource implements DataSource, Function<Class, Enti
                                 }
                                 rs.close();
                                 stmt.close();
+                            } catch (SQLException se) {
+                                if (info.tableStrategy == null) throw se;
+                            }
                             info.initedPrimaryValue = true;
                         }
                     }
@@ -393,7 +402,22 @@ public final class DataDefaultSource implements DataSource, Function<Class, Enti
                         sqls[index++] = sb.toString();
                     }
                 }
+                try {
                     prestmt.executeBatch();
+                } catch (SQLException se) {
+                    if (info.tableStrategy == null || !info.tablenotexistSqlstate.equals(se.getSQLState())) throw se;
+                    synchronized (info.tables) {
+                        final String oldTable = info.table;
+                        final String newTable = info.getTable(values[0]);
+                        if (!info.tables.contains(newTable)) {
+                            Statement st = conn.createStatement();
+                            st.execute(info.tablecopySQL.replace("${newtable}", newTable).replace("${oldtable}", oldTable));
+                            st.close();
+                            info.tables.add(newTable);
+                        }
+                    }
+                    prestmt.executeBatch();
+                }
                 if (writeListener != null) writeListener.insert(sqls);
                 if (info.autoGenerated) { //由数据库自动生成主键值
                     ResultSet set = prestmt.getGeneratedKeys();

src/org/redkale/source/DistributeTable.java

@@ -0,0 +1,24 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.redkale.source;
+
+import java.lang.annotation.*;
+import static java.lang.annotation.ElementType.*;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+/**
+ *
+ * <p>
+ * 详情见: http://redkale.org
+ *
+ * @author zhangjx
+ */
+@Target({TYPE})
+@Retention(RUNTIME)
+public @interface DistributeTable {
+
+    Class<? extends DistributeTableStrategy> strategy();
+}

src/org/redkale/source/DistributeTableStrategy.java

@@ -0,0 +1,29 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.redkale.source;
+
+import java.io.Serializable;
+
+/**
+ *
+ * <p>
+ * 详情见: http://redkale.org
+ *
+ * @author zhangjx
+ * @param <T>
+ */
+public interface DistributeTableStrategy<T> {
+
+    default String getTable(String table, Serializable primary) {
+        return null;
+    }
+
+    default String getTable(String table, FilterNode node) {
+        return null;
+    }
+
+    public String getTable(String table, T bean);
+}

src/org/redkale/source/EntityInfo.java

@@ -37,7 +37,7 @@ public final class EntityInfo<T> {
     private final Class<T> type;
 
     //类对应的数据表名, 如果是VirtualEntity 类， 则该字段为null
-    private final String table;
+    final String table;
 
     private final Creator<T> creator;
 
@@ -62,11 +62,19 @@ public final class EntityInfo<T> {
 
     final String notcontainSQL; //用于反向LIKE使用
 
+    final String tablenotexistSqlstate; //用于判断表不存在的使用
+
+    final String tablecopySQL; //用于复制表结构使用
+
+    final Set<String> tables = new HashSet<>(); //用于存在table_20160202类似这种分布式表
+
+    final DistributeTableStrategy<T> tableStrategy;
+
     final String querySQL;
 
     private final Attribute<T, Serializable>[] queryAttributes; //数据库中所有字段
 
-    final String insertSQL;
+    private String insertSQL;
 
     final Attribute<T, Serializable>[] insertAttributes; //数据库中所有可新增字段
 
@@ -145,6 +153,15 @@ public final class EntityInfo<T> {
             this.fullloader = fullloader;
             this.table = (t == null) ? type.getSimpleName().toLowerCase() : (t.catalog().isEmpty()) ? t.name() : (t.catalog() + '.' + t.name());
         }
+        DistributeTable dt = type.getAnnotation(DistributeTable.class);
+        DistributeTableStrategy dts = null;
+        try {
+            dts = (dt == null) ? null : dt.strategy().newInstance();
+        } catch (Exception e) {
+            logger.severe(type + " init DistributeTableStrategy error", e);
+        }
+        this.tableStrategy = dts;
+
         this.creator = Creator.create(type);
         Attribute idAttr0 = null;
         Map<String, String> aliasmap0 = null;
@@ -231,7 +248,7 @@ public final class EntityInfo<T> {
                 if (insertsb2.length() > 0) insertsb2.append(',');
                 insertsb2.append('?');
             }
-            this.insertSQL = "INSERT INTO " + table + "(" + insertsb + ") VALUES(" + insertsb2 + ")";
+            this.insertSQL = "INSERT INTO " + (this.tableStrategy == null ? table : "${newtable}") + "(" + insertsb + ") VALUES(" + insertsb2 + ")";
             StringBuilder updatesb = new StringBuilder();
             for (String col : updatecols) {
                 if (updatesb.length() > 0) updatesb.append(", ");
@@ -259,6 +276,9 @@ public final class EntityInfo<T> {
         if (conf == null) conf = new Properties();
         this.containSQL = conf.getProperty(JDBC_CONTAIN_SQLTEMPLATE, "LOCATE(${keystr}, ${column}) > 0");
         this.notcontainSQL = conf.getProperty(JDBC_NOTCONTAIN_SQLTEMPLATE, "LOCATE(${keystr}, ${column}) = 0");
+
+        this.tablenotexistSqlstate = conf.getProperty(JDBC_TABLENOTEXIST_SQLSTATE, "42S02");
+        this.tablecopySQL = conf.getProperty(JDBC_TABLECOPY_SQLTEMPLATE, "CREATE TABLE ${newtable}  LIKE ${oldtable}");
     }
 
     public void createPrimaryValue(T src) {
@@ -295,16 +315,27 @@ public final class EntityInfo<T> {
         return table == null;
     }
 
+    public String getInsertSQL(T bean) {
+        if (this.tableStrategy == null) return insertSQL;
+        return insertSQL.replace("${newtable}", getTable(bean));
+    }
+
     public String getTable(Serializable primary) {
-        return table;
+        if (tableStrategy == null) return table;
+        String t = tableStrategy.getTable(table, primary);
+        return t == null || t.isEmpty() ? table : t;
     }
 
     public String getTable(FilterNode node) {
-        return table;
+        if (tableStrategy == null) return table;
+        String t = tableStrategy.getTable(table, node);
+        return t == null || t.isEmpty() ? table : t;
     }
 
     public String getTable(T bean) {
-        return table;
+        if (tableStrategy == null) return table;
+        String t = tableStrategy.getTable(table, bean);
+        return t == null || t.isEmpty() ? table : t;
     }
 
     public Attribute<T, Serializable> getPrimary() {