fix(server): ensure graph clear API does not clear system table

Author: LYD031106

hugegraph-server/hugegraph-mysql/src/main/java/org/apache/hugegraph/backend/store/mysql/MysqlStore.java

@@ -54,7 +54,6 @@ public abstract class MysqlStore extends AbstractBackendStore<Session> {
     private final BackendStoreProvider provider;
 
     private final Map<HugeType, MysqlTable> tables;
-
     private MysqlSessions sessions;
 
     public MysqlStore(final BackendStoreProvider provider,
@@ -338,6 +337,9 @@ protected void clearTables() {
     protected void truncateTables() {
         Session session = this.sessions.session();
         for (MysqlTable table : this.tables()) {
+            if (table instanceof MysqlTables.Meta || table instanceof MysqlTables.Counters){
+                continue;
+            }
             table.truncate(session);
         }
     }

hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/unit/UnitTestSuite.java

@@ -46,6 +46,8 @@
 import org.apache.hugegraph.unit.id.IdTest;
 import org.apache.hugegraph.unit.id.IdUtilTest;
 import org.apache.hugegraph.unit.id.SplicingIdGeneratorTest;
+import org.apache.hugegraph.unit.mysql.BaseMysqlUnitTest;
+import org.apache.hugegraph.unit.mysql.MysqlTest;
 import org.apache.hugegraph.unit.mysql.MysqlUtilTest;
 import org.apache.hugegraph.unit.mysql.WhereBuilderTest;
 import org.apache.hugegraph.unit.rocksdb.RocksDBCountersTest;
@@ -130,6 +132,8 @@
         /* mysql */
         MysqlUtilTest.class,
         WhereBuilderTest.class,
+        BaseMysqlUnitTest.class,
+        MysqlTest.class,
 
         /* rocksdb */
         RocksDBSessionsTest.class,

hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/unit/mysql/BaseMysqlUnitTest.java

@@ -19,39 +19,41 @@
 
 package org.apache.hugegraph.unit.mysql;
 
+import org.apache.commons.configuration2.Configuration;
 import org.apache.hugegraph.backend.store.BackendStore;
 import org.apache.hugegraph.backend.store.hbase.HbaseStoreProvider;
 import org.apache.hugegraph.backend.store.mysql.MysqlStoreProvider;
 import org.apache.hugegraph.config.HugeConfig;
+import org.apache.hugegraph.testutil.Utils;
 import org.apache.hugegraph.unit.BaseUnitTest;
 import org.apache.hugegraph.unit.FakeObjects;
 import org.junit.After;
 import org.junit.Before;
 
 public class BaseMysqlUnitTest extends BaseUnitTest {
-    protected BackendStore store;
+
+    private static final String GRAPH_NAME = "test_graph";
 
     protected HugeConfig config;
     protected MysqlStoreProvider provider;
 
-    @Before
     public void setup() {
-        this.config = FakeObjects.newConfig();
-
+        try {
+            Configuration conf = Utils.getConf();
+            this.config = new HugeConfig(conf);
+        } catch (Exception e) {
+            this.config = FakeObjects.newConfig();
+        }
         this.provider = new MysqlStoreProvider();
-
-        this.store = this.provider.loadSystemStore(config);
+        this.provider.open(GRAPH_NAME);
+        this.provider.loadSystemStore(config).open(config);
+        this.provider.loadGraphStore(config).open(config);
+        this.provider.loadSchemaStore(config).open(config);
+        this.provider.init();
     }
 
     @After
     public void down(){
-        if (this.store != null) {
-            try {
-                this.store.close();
-            } catch (Exception e) {
-                // pass
-            }
-        }
         if (this.provider != null) {
             try {
                 this.provider.close();

hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/unit/mysql/MysqlTest.java

@@ -19,37 +19,24 @@
 
 package org.apache.hugegraph.unit.mysql;
 
+import org.apache.hugegraph.backend.store.BackendStore;
 import org.apache.hugegraph.testutil.Assert;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
 public class MysqlTest extends BaseMysqlUnitTest{
-    private static final String GRAPH_NAME = "test_graph";
-
     @Before
     public void setUp(){
-        this.provider.open(GRAPH_NAME);
-        this.provider.init();
-    }
-
-    @After
-    public void teardown(){
-        if (this.store != null) {
-            this.store.close();
-        }
-        if (this.provider != null) {
-            this.provider.close();
-        }
+        super.setup();
     }
 
     @Test
     public void testMysqlMetaVersion(){
-        // init store
-        this.store.init();
-        String beforeVersion = this.store.storedVersion();
-        this.store.truncate();
-        String afterInitVersion = this.store.storedVersion();
+        BackendStore systemStore = this.provider.loadSystemStore(config);
+        String beforeVersion = systemStore.storedVersion();
+        this.provider.truncate();
+        String afterInitVersion = systemStore.storedVersion();
         Assert.assertNotNull(beforeVersion);
         Assert.assertNotNull(afterInitVersion);
         Assert.assertEquals(beforeVersion, afterInitVersion);