format hg-server-mysql

hugegraph-server/hugegraph-mysql/pom.xml

@@ -1,22 +1,24 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements. See the NOTICE file distributed with this
-  work for additional information regarding copyright ownership. The ASF
-  licenses this file to You under the Apache License, Version 2.0 (the
-  "License"); you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
 
-      http://www.apache.org/licenses/LICENSE-2.0
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
 
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-  License for the specific language governing permissions and limitations
-  under the License.
   -->
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>hugegraph-server</artifactId>

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

@@ -1,18 +1,20 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
  */
 
 package org.apache.hugegraph.backend.store.mysql;
@@ -45,7 +47,7 @@ public class MysqlEntryIterator extends BackendEntryIterator {
     private boolean exceedLimit;
 
     public MysqlEntryIterator(ResultSetWrapper rs, Query query,
-           BiFunction<BackendEntry, BackendEntry, BackendEntry> merger) {
+                              BiFunction<BackendEntry, BackendEntry, BackendEntry> merger) {
         super(query);
         this.results = rs;
         this.merger = merger;
@@ -100,7 +102,7 @@ protected PageState pageState() {
         byte[] position;
         // There is no latest or no next page
         if (this.lastest == null || !this.exceedLimit &&
-            this.fetched() <= this.query.limit() && this.next == null) {
+                                    this.fetched() <= this.query.limit() && this.next == null) {
             position = PageState.EMPTY_BYTES;
         } else {
             MysqlBackendEntry entry = (MysqlBackendEntry) this.lastest;
@@ -168,6 +170,18 @@ public PagePosition(Map<HugeKeys, Object> columns) {
             this.columns = columns;
         }
 
+        public static PagePosition fromBytes(byte[] bytes) {
+            String json = StringEncoding.decode(bytes);
+            @SuppressWarnings("unchecked")
+            Map<String, Object> columns = JsonUtil.fromJson(json, Map.class);
+            Map<HugeKeys, Object> keyColumns = new LinkedHashMap<>();
+            for (Map.Entry<String, Object> entry : columns.entrySet()) {
+                HugeKeys key = MysqlTable.parseKey(entry.getKey());
+                keyColumns.put(key, entry.getValue());
+            }
+            return new PagePosition(keyColumns);
+        }
+
         public Map<HugeKeys, Object> columns() {
             return this.columns;
         }
@@ -181,17 +195,5 @@ public byte[] toBytes() {
             String json = JsonUtil.toJson(this.columns);
             return StringEncoding.encode(json);
         }
-
-        public static PagePosition fromBytes(byte[] bytes) {
-            String json = StringEncoding.decode(bytes);
-            @SuppressWarnings("unchecked")
-            Map<String, Object> columns = JsonUtil.fromJson(json, Map.class);
-            Map<HugeKeys, Object> keyColumns = new LinkedHashMap<>();
-            for (Map.Entry<String, Object> entry : columns.entrySet()) {
-                HugeKeys key = MysqlTable.parseKey(entry.getKey());
-                keyColumns.put(key, entry.getValue());
-            }
-            return new PagePosition(keyColumns);
-        }
     }
 }

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

@@ -1,25 +1,28 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
  */
 
 package org.apache.hugegraph.backend.store.mysql;
 
 import java.util.Map;
 
 import org.apache.hugegraph.backend.store.BackendMetrics;
+
 import com.google.common.collect.ImmutableMap;
 
 public class MysqlMetrics implements BackendMetrics {

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

@@ -1,18 +1,20 @@
 /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
  */
 
 package org.apache.hugegraph.backend.store.mysql;
@@ -25,93 +27,84 @@
 
 public class MysqlOptions extends OptionHolder {
 
+    public static final ConfigOption<String> JDBC_DRIVER =
+        new ConfigOption<>(
+            "jdbc.driver",
+            "The JDBC driver class to connect database.",
+            disallowEmpty(),
+            "com.mysql.jdbc.Driver"
+        );
+    public static final ConfigOption<String> JDBC_URL =
+        new ConfigOption<>(
+            "jdbc.url",
+            "The url of database in JDBC format.",
+            disallowEmpty(),
+            "jdbc:mysql://127.0.0.1:3306"
+        );
+    public static final ConfigOption<String> JDBC_USERNAME =
+        new ConfigOption<>(
+            "jdbc.username",
+            "The username to login database.",
+            disallowEmpty(),
+            "root"
+        );
+    public static final ConfigOption<String> JDBC_PASSWORD =
+        new ConfigOption<>(
+            "jdbc.password",
+            "The password corresponding to jdbc.username.",
+            null,
+            "******"
+        );
+    public static final ConfigOption<Boolean> JDBC_FORCED_AUTO_RECONNECT =
+        new ConfigOption<>(
+            "jdbc.forced_auto_reconnect",
+            "Whether to forced auto reconnect to the database even " +
+            "if the connection fails at the first time. Note that " +
+            "forced_auto_reconnect=true will disable fail-fast.",
+            disallowEmpty(),
+            false
+        );
+    public static final ConfigOption<Integer> JDBC_RECONNECT_MAX_TIMES =
+        new ConfigOption<>(
+            "jdbc.reconnect_max_times",
+            "The reconnect times when the database connection fails.",
+            rangeInt(1, 10),
+            3
+        );
+    public static final ConfigOption<Integer> JDBC_RECONNECT_INTERVAL =
+        new ConfigOption<>(
+            "jdbc.reconnect_interval",
+            "The interval(seconds) between reconnections when the " +
+            "database connection fails.",
+            rangeInt(1, 10),
+            3
+        );
+    public static final ConfigOption<String> JDBC_SSL_MODE =
+        new ConfigOption<>(
+            "jdbc.ssl_mode",
+            "The SSL mode of connections with database.",
+            disallowEmpty(),
+            "false"
+        );
+    public static final ConfigOption<String> JDBC_STORAGE_ENGINE =
+        new ConfigOption<>(
+            "jdbc.storage_engine",
+            "The storage engine of backend store database, " +
+            "like InnoDB/MyISAM/RocksDB for MySQL.",
+            disallowEmpty(),
+            "InnoDB"
+        );
+    private static volatile MysqlOptions instance;
+
     protected MysqlOptions() {
         super();
     }
 
-    private static volatile MysqlOptions instance;
-
     public static synchronized MysqlOptions instance() {
         if (instance == null) {
             instance = new MysqlOptions();
             instance.registerOptions();
         }
         return instance;
     }
-
-    public static final ConfigOption<String> JDBC_DRIVER =
-            new ConfigOption<>(
-                    "jdbc.driver",
-                    "The JDBC driver class to connect database.",
-                    disallowEmpty(),
-                    "com.mysql.jdbc.Driver"
-            );
-
-    public static final ConfigOption<String> JDBC_URL =
-            new ConfigOption<>(
-                    "jdbc.url",
-                    "The url of database in JDBC format.",
-                    disallowEmpty(),
-                    "jdbc:mysql://127.0.0.1:3306"
-            );
-
-    public static final ConfigOption<String> JDBC_USERNAME =
-            new ConfigOption<>(
-                    "jdbc.username",
-                    "The username to login database.",
-                    disallowEmpty(),
-                    "root"
-            );
-
-    public static final ConfigOption<String> JDBC_PASSWORD =
-            new ConfigOption<>(
-                    "jdbc.password",
-                    "The password corresponding to jdbc.username.",
-                    null,
-                    "******"
-            );
-
-    public static final ConfigOption<Boolean> JDBC_FORCED_AUTO_RECONNECT =
-            new ConfigOption<>(
-                    "jdbc.forced_auto_reconnect",
-                    "Whether to forced auto reconnect to the database even " +
-                    "if the connection fails at the first time. Note that " +
-                    "forced_auto_reconnect=true will disable fail-fast.",
-                    disallowEmpty(),
-                    false
-            );
-
-    public static final ConfigOption<Integer> JDBC_RECONNECT_MAX_TIMES =
-            new ConfigOption<>(
-                    "jdbc.reconnect_max_times",
-                    "The reconnect times when the database connection fails.",
-                    rangeInt(1, 10),
-                    3
-            );
-
-    public static final ConfigOption<Integer> JDBC_RECONNECT_INTERVAL =
-            new ConfigOption<>(
-                    "jdbc.reconnect_interval",
-                    "The interval(seconds) between reconnections when the " +
-                    "database connection fails.",
-                    rangeInt(1, 10),
-                    3
-            );
-
-    public static final ConfigOption<String> JDBC_SSL_MODE =
-            new ConfigOption<>(
-                    "jdbc.ssl_mode",
-                    "The SSL mode of connections with database.",
-                    disallowEmpty(),
-                    "false"
-            );
-
-    public static final ConfigOption<String> JDBC_STORAGE_ENGINE =
-            new ConfigOption<>(
-                   "jdbc.storage_engine",
-                   "The storage engine of backend store database, " +
-                   "like InnoDB/MyISAM/RocksDB for MySQL.",
-                    disallowEmpty(),
-                    "InnoDB"
-            );
 }