Translate engineconn-plugins-openlookeng service classes from Scala t…

…o Java (#4474)

linkis-engineconn-plugins/openlookeng/src/main/java/org/apache/linkis/engineplugin/openlookeng/OpenLooKengECPlugin.java

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+/*
+ * 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.
+ */
+
+package org.apache.linkis.engineplugin.openlookeng;
+
+import org.apache.linkis.engineplugin.openlookeng.builder.OpenLooKengProcessECLaunchBuilder;
+import org.apache.linkis.engineplugin.openlookeng.factory.OpenLooKengEngineConnFactory;
+import org.apache.linkis.manager.engineplugin.common.EngineConnPlugin;
+import org.apache.linkis.manager.engineplugin.common.creation.EngineConnFactory;
+import org.apache.linkis.manager.engineplugin.common.launch.EngineConnLaunchBuilder;
+import org.apache.linkis.manager.engineplugin.common.resource.EngineResourceFactory;
+import org.apache.linkis.manager.engineplugin.common.resource.GenericEngineResourceFactory;
+import org.apache.linkis.manager.label.entity.Label;
+import org.apache.linkis.manager.label.entity.engine.EngineType;
+import org.apache.linkis.manager.label.utils.EngineTypeLabelCreator;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class OpenLooKengECPlugin implements EngineConnPlugin {
+
+  private final Object resourceLocker = new Object();
+  private final Object engineFactoryLocker = new Object();
+
+  private EngineResourceFactory engineResourceFactory;
+  private EngineConnFactory engineFactory;
+
+  private final List<Label<?>> defaultLabels = new ArrayList<>();
+
+  @Override
+  public void init(Map<String, Object> params) {
+    Label<?> engineTypeLabel =
+        EngineTypeLabelCreator.createEngineTypeLabel(EngineType.OPENLOOKENG().toString());
+    this.defaultLabels.add(engineTypeLabel);
+  }
+
+  @Override
+  public EngineResourceFactory getEngineResourceFactory() {
+    if (engineResourceFactory == null) {
+      synchronized (resourceLocker) {
+        if (engineResourceFactory == null) {
+          engineResourceFactory = new GenericEngineResourceFactory();
+        }
+      }
+    }
+    return engineResourceFactory;
+  }
+
+  @Override
+  public EngineConnLaunchBuilder getEngineConnLaunchBuilder() {
+    return new OpenLooKengProcessECLaunchBuilder();
+  }
+
+  @Override
+  public EngineConnFactory getEngineConnFactory() {
+    if (engineFactory == null) {
+      synchronized (engineFactoryLocker) {
+        if (engineFactory == null) {
+          engineFactory = new OpenLooKengEngineConnFactory();
+        }
+      }
+    }
+    return engineFactory;
+  }
+
+  @Override
+  public List<Label<?>> getDefaultLabels() {
+    return this.defaultLabels;
+  }
+}