format hg-server-core

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/HugeException.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;
@@ -41,10 +43,6 @@ public HugeException(String message, Throwable cause, Object... args) {
         super(String.format(message, args), cause);
     }
 
-    public Throwable rootCause() {
-        return rootCause(this);
-    }
-
     public static Throwable rootCause(Throwable e) {
         Throwable cause = e;
         while (cause.getCause() != null) {
@@ -59,4 +57,8 @@ public static boolean isInterrupted(Throwable e) {
                rootCause instanceof TraversalInterruptedException ||
                rootCause instanceof InterruptedIOException;
     }
+
+    public Throwable rootCause() {
+        return rootCause(this);
+    }
 }

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/HugeFactory.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;
@@ -41,7 +43,9 @@
 public class HugeFactory {
 
     private static final Logger LOG = Log.logger(HugeFactory.class);
-
+    private static final String NAME_REGEX = "^[A-Za-z][A-Za-z0-9_]{0,47}$";
+    private static final Map<String, HugeGraph> GRAPHS = new HashMap<>();
+    private static final AtomicBoolean SHUT_DOWN = new AtomicBoolean(false);
     private static final Thread SHUT_DOWN_HOOK = new Thread(() -> {
         LOG.info("HugeGraph is shutting down");
         HugeFactory.shutdown(30L, true);
@@ -54,12 +58,6 @@ public class HugeFactory {
         Runtime.getRuntime().addShutdownHook(SHUT_DOWN_HOOK);
     }
 
-    private static final String NAME_REGEX = "^[A-Za-z][A-Za-z0-9_]{0,47}$";
-
-    private static final Map<String, HugeGraph> GRAPHS = new HashMap<>();
-
-    private static final AtomicBoolean SHUT_DOWN = new AtomicBoolean(false);
-
     public static synchronized HugeGraph open(Configuration config) {
         HugeConfig conf = config instanceof HugeConfig ?
                           (HugeConfig) config : new HugeConfig(config);
@@ -145,7 +143,8 @@ public static void shutdown(long timeout) {
 
     /**
      * Stop all the daemon threads
-     * @param timeout wait in seconds
+     *
+     * @param timeout         wait in seconds
      * @param ignoreException don't throw exception if true
      */
     public static void shutdown(long timeout, boolean ignoreException) {

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/HugeGraph.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;
@@ -64,6 +66,18 @@
  */
 public interface HugeGraph extends Graph {
 
+    static void registerTraversalStrategies(Class<?> clazz) {
+        TraversalStrategies strategies = TraversalStrategies.GlobalCache
+            .getStrategies(Graph.class)
+            .clone();
+        strategies.addStrategies(HugeVertexStepStrategy.instance(),
+                                 HugeGraphStepStrategy.instance(),
+                                 HugeCountStepStrategy.instance(),
+                                 HugePrimaryKeyStrategy.instance());
+
+        TraversalStrategies.GlobalCache.registerStrategies(clazz, strategies);
+    }
+
     HugeGraph hugegraph();
 
     SchemaManager schema();
@@ -249,7 +263,7 @@ public interface HugeGraph extends Graph {
     <K, V> V option(TypedOption<K, V> option);
 
     void registerRpcServices(RpcServiceConfig4Server serverConfig,
-                                    RpcServiceConfig4Client clientConfig);
+                             RpcServiceConfig4Client clientConfig);
 
     default List<String> mapPkId2Name(Collection<Id> ids) {
         List<String> names = new ArrayList<>(ids.size());
@@ -313,16 +327,4 @@ default Id[] mapVlName2Id(String[] vertexLabels) {
         }
         return ids;
     }
-
-    static void registerTraversalStrategies(Class<?> clazz) {
-        TraversalStrategies strategies = TraversalStrategies.GlobalCache
-                                                            .getStrategies(Graph.class)
-                                                            .clone();
-        strategies.addStrategies(HugeVertexStepStrategy.instance(),
-                                 HugeGraphStepStrategy.instance(),
-                                 HugeCountStepStrategy.instance(),
-                                 HugePrimaryKeyStrategy.instance());
-
-        TraversalStrategies.GlobalCache.registerStrategies(clazz, strategies);
-    }
 }

hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/HugeGraphParams.java

@@ -1,36 +1,39 @@
 /*
- * 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;
 
+import org.apache.hugegraph.analyzer.Analyzer;
 import org.apache.hugegraph.backend.LocalCounter;
+import org.apache.hugegraph.backend.serializer.AbstractSerializer;
 import org.apache.hugegraph.backend.store.BackendFeatures;
 import org.apache.hugegraph.backend.store.BackendStore;
 import org.apache.hugegraph.backend.store.ram.RamTable;
 import org.apache.hugegraph.backend.tx.GraphTransaction;
 import org.apache.hugegraph.backend.tx.SchemaTransaction;
+import org.apache.hugegraph.config.HugeConfig;
+import org.apache.hugegraph.event.EventHub;
 import org.apache.hugegraph.job.EphemeralJob;
 import org.apache.hugegraph.task.ServerInfoManager;
 import org.apache.hugegraph.type.define.GraphMode;
 import org.apache.hugegraph.type.define.GraphReadMode;
-import org.apache.hugegraph.analyzer.Analyzer;
-import org.apache.hugegraph.backend.serializer.AbstractSerializer;
-import org.apache.hugegraph.config.HugeConfig;
-import org.apache.hugegraph.event.EventHub;
+
 import com.google.common.util.concurrent.RateLimiter;
 
 /**