feat: 增加缓存机制，sql在生命周期内仅构建一次

fluent-sql-core/src/main/java/group/flyfish/fluent/chain/SQLImpl.java

@@ -14,6 +14,7 @@ import group.flyfish.fluent.query.Parameterized;
 import group.flyfish.fluent.query.Query;
 import group.flyfish.fluent.update.Update;
 import group.flyfish.fluent.update.UpdateImpl;
+import group.flyfish.fluent.utils.cache.CachedWrapper;
 import group.flyfish.fluent.utils.context.AliasComposite;
 import group.flyfish.fluent.utils.data.ParameterUtils;
 import group.flyfish.fluent.utils.sql.ConcatSegment;
@@ -25,6 +26,7 @@ import org.springframework.util.Assert;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
 /**
@@ -42,6 +44,9 @@ final class SQLImpl extends ConcatSegment<SQLImpl> implements SQLOperations, Pre
     // 主表class，默认是第一个from的表为主表
     private Class<?> primaryClass;
 
+    // sql实体提供者
+    private final Supplier<SQLEntity> entity = CachedWrapper.wrap(this::entity);
+
     /**
      * 绑定实现类
      *
@@ -190,7 +195,7 @@ final class SQLImpl extends ConcatSegment<SQLImpl> implements SQLOperations, Pre
      * @param <T>   泛型
      */
     public <T> T one(Class<T> clazz) {
-        return SHARED_OPERATIONS.selectOne(entity(), clazz);
+        return SHARED_OPERATIONS.selectOne(entity.get(), clazz);
     }
 
     @Override
@@ -206,7 +211,7 @@ final class SQLImpl extends ConcatSegment<SQLImpl> implements SQLOperations, Pre
      */
     @Override
     public <T> List<T> list(Class<T> clazz) {
-        return SHARED_OPERATIONS.select(entity(), clazz);
+        return SHARED_OPERATIONS.select(entity.get(), clazz);
     }
 
     /**
@@ -265,6 +270,7 @@ final class SQLImpl extends ConcatSegment<SQLImpl> implements SQLOperations, Pre
      * @return 转换结果
      */
     private SQLEntity entity() {
-        return SQLEntity.of(this::sql, this::parsedParameters);
+        return SQLEntity.of(CachedWrapper.wrap(this::sql), this::parsedParameters);
     }
+
 }

fluent-sql-core/src/main/java/group/flyfish/fluent/chain/select/AfterOrderSqlChain.java

@@ -44,5 +44,4 @@ public interface AfterOrderSqlChain extends ExecutableSql {
      * @return 结果列表
      */
     <T> List<T> list(Class<T> clazz);
-
 }

fluent-sql-core/src/main/java/group/flyfish/fluent/utils/cache/BoundObject.java

@@ -0,0 +1,20 @@
+package group.flyfish.fluent.utils.cache;
+
+import java.util.function.Supplier;
+
+/**
+ * 绑定的单值对象
+ *
+ * @param <T> 泛型
+ */
+public class BoundObject<T> {
+
+    private T object;
+
+    public T computeIfAbsent(Supplier<T> supplier) {
+        if (null == object) {
+            object = supplier.get();
+        }
+        return object;
+    }
+}

fluent-sql-core/src/main/java/group/flyfish/fluent/utils/cache/CachedWrapper.java

@@ -0,0 +1,23 @@
+package group.flyfish.fluent.utils.cache;
+
+import java.util.function.Supplier;
+
+/**
+ * 缓存的supplier
+ *
+ * @author wangyu
+ */
+public interface CachedWrapper {
+
+    /**
+     * 包装简单的supplier
+     *
+     * @param supplier 提供者
+     * @param <T>      泛型
+     * @return 结果
+     */
+    static <T> Supplier<T> wrap(Supplier<T> supplier) {
+        BoundObject<T> object = new BoundObject<>();
+        return () -> object.computeIfAbsent(supplier);
+    }
+}

fluent-sql-core/src/main/java/group/flyfish/fluent/utils/sql/SqlMethod.java

@@ -0,0 +1,18 @@
+package group.flyfish.fluent.utils.sql;
+
+/**
+ * sql方法，用于缓存执行
+ *
+ * @param <R> 返回值泛型
+ */
+@FunctionalInterface
+public interface SqlMethod<R> {
+
+    /**
+     * 执行方法
+     *
+     * @param parameters 参数
+     * @return 结果
+     */
+    R execute(Object... parameters);
+}

fluent-sql-spring-jdbc/src/test/java/group/flyfish/framework/FluentJdbcTest.java

@@ -37,18 +37,21 @@ public class FluentJdbcTest {
                 new Driver(),
                 "jdbc:mysql://127.0.0.1:3306/epi_project?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=Asia/Shanghai",
                 "root",
-                "oI3WtMO8h%mSYARp"
+                "Unicom#2018" //   "oI3WtMO8h%mSYARp"
         );
         // 准备待测试用例
         List<TestCase<?>> cases = Arrays.asList(
+                // jdbc测试
                 new JdbcTestCase(dataSource),
+                // Mybatis测试
                 new MybatisTestCase(dataSource),
-                new FluentSqlTestCase(dataSource)
+                // FluentSQL测试
+                new FluentSqlTestCase(dataSource),
+                // 单表测试
+                new SingleTableTestCase()
         );
         // 执行测试
         cases.forEach(TestCase::test);
-        // 单表测试
-        new SingleTableTestCase().test();
     }
 
     /**

fluent-sql-spring-jdbc/src/test/java/group/flyfish/framework/cases/AbstractTestCase.java

@@ -43,20 +43,23 @@ public abstract class AbstractTestCase<T> implements TestCase<T> {
         Name anno = getClass().getAnnotation(Name.class);
         assert anno != null;
         String name = anno.value();
-        long current = System.currentTimeMillis();
+        print("=====准备执行任务《{0}》=====", name);
-        T result = null;
         try {
-            result = run();
+            long current = System.currentTimeMillis();
+            T result = run();
             print("【初次执行】执行任务《{0}》用时：{1}ms", name, System.currentTimeMillis() - current);
+            for (int i = 0; i < 10; i ++) {
                 current = System.currentTimeMillis();
                 result = run();
+                print("【正常执行】执行任务《{0}》用时：{1}ms", name, System.currentTimeMillis() - current);
+            }
+            printResult(result);
             return result;
         } catch (Exception e) {
             print("执行失败！{0}", e.getMessage());
             throw new RuntimeException(e);
         } finally {
-            print("【正常执行】执行任务《{0}》用时：{1}ms", name, System.currentTimeMillis() - current);
+            print("=====完成执行任务《{0}》=====");
-            printResult(result);
         }
     }
 }

fluent-sql-spring-jdbc/src/test/java/group/flyfish/framework/cases/FluentSqlTestCase.java

@@ -1,7 +1,8 @@
 package group.flyfish.framework.cases;
 
-import group.flyfish.fluent.debug.FluentSqlDebugger;
+import group.flyfish.fluent.chain.select.AfterWhereSqlChain;
 import group.flyfish.fluent.operations.JdbcTemplateFluentSQLOperations;
+import group.flyfish.fluent.utils.cache.CachedWrapper;
 import group.flyfish.framework.TestCase;
 import group.flyfish.framework.entity.SaasOrder;
 import group.flyfish.framework.entity.SaasPlan;
@@ -11,6 +12,7 @@ import org.springframework.jdbc.core.JdbcTemplate;
 
 import javax.sql.DataSource;
 import java.util.List;
+import java.util.function.Supplier;
 
 import static group.flyfish.fluent.chain.SQL.select;
 import static group.flyfish.fluent.chain.select.SelectComposite.composite;
@@ -19,6 +21,8 @@ import static group.flyfish.fluent.query.Query.where;
 @TestCase.Name("使用fluent-sql")
 public class FluentSqlTestCase extends AbstractTestCase<List<TenantContext>> {
 
+    private AfterWhereSqlChain sql;
+
     public FluentSqlTestCase(DataSource dataSource) {
         super(dataSource);
     }
@@ -32,6 +36,18 @@ public class FluentSqlTestCase extends AbstractTestCase<List<TenantContext>> {
     public void initialize() throws Exception {
         // 基于构造器自动绑定注册，在实际应用中使用@Bean声明即可，可参考下面的demo
         new JdbcTemplateFluentSQLOperations(new JdbcTemplate(dataSource));
+        // 缓存构建结果
+        this.sql = select(
+                // 查询租户全量字段
+                composite(SaasTenant::getId, SaasTenant::getName, SaasTenant::getIdentifier, SaasTenant::getDatasource,
+                        SaasTenant::getStorage, SaasTenant::getStatus, SaasTenant::getEnable),
+                // 查询套餐
+                composite(SaasOrder::getQuotaConfig, SaasOrder::getOrderTime, SaasOrder::getExpireTime,
+                        SaasOrder::getOrderType))
+                .from(SaasTenant.class)
+                .leftJoin(SaasOrder.class).on(where(SaasOrder::getTenantId).eq(SaasTenant::getId))
+                .leftJoin(SaasPlan.class).on(where(SaasPlan::getId).eq(SaasOrder::getPlanId))
+                .matching(where(SaasTenant::getEnable).eq(true));
         // 启用调试
 //        FluentSqlDebugger.enable();
     }
@@ -45,17 +61,6 @@ public class FluentSqlTestCase extends AbstractTestCase<List<TenantContext>> {
     @Override
     public List<TenantContext> run() throws Exception {
         // 一个平平无奇的查询
-        return select(
+        return sql.list(TenantContext.class);
-                // 查询租户全量字段
-                composite(SaasTenant::getId, SaasTenant::getName, SaasTenant::getIdentifier, SaasTenant::getDatasource,
-                        SaasTenant::getStorage, SaasTenant::getStatus, SaasTenant::getEnable),
-                // 查询套餐
-                composite(SaasOrder::getQuotaConfig, SaasOrder::getOrderTime, SaasOrder::getExpireTime,
-                        SaasOrder::getOrderType))
-                .from(SaasTenant.class)
-                .leftJoin(SaasOrder.class).on(where(SaasOrder::getTenantId).eq(SaasTenant::getId))
-                .leftJoin(SaasPlan.class).on(where(SaasPlan::getId).eq(SaasOrder::getPlanId))
-                .matching(where(SaasTenant::getEnable).eq(true))
-                .list(TenantContext.class);
     }
 }