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java/org/apache/tomcat/SimpleInstanceManager.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.tomcat;
+
+import java.lang.reflect.InvocationTargetException;
+
+import javax.naming.NamingException;
+
+/**
+ * SimpleInstanceManager
+ *
+ * Implement the org.apache.tomcat.InstanceManager interface.
+ */
+public class SimpleInstanceManager implements InstanceManager {
+
+    public SimpleInstanceManager() {
+    }
+
+    @Override
+    public Object newInstance(Class<?> clazz) throws IllegalAccessException,
+            InvocationTargetException, NamingException, InstantiationException, NoSuchMethodException {
+        return prepareInstance(clazz.getConstructor().newInstance());
+    }
+
+    @Override
+    public Object newInstance(String className) throws IllegalAccessException,
+            InvocationTargetException, NamingException, InstantiationException,
+            ClassNotFoundException, NoSuchMethodException  {
+        Class<?> clazz = Thread.currentThread().getContextClassLoader().loadClass(className);
+        return prepareInstance(clazz.getConstructor().newInstance());
+    }
+
+    @Override
+    public Object newInstance(String fqcn, ClassLoader classLoader) throws IllegalAccessException,
+            InvocationTargetException, NamingException, InstantiationException,
+            ClassNotFoundException, NoSuchMethodException  {
+        Class<?> clazz = classLoader.loadClass(fqcn);
+        return prepareInstance(clazz.getConstructor().newInstance());
+    }
+
+    @Override
+    public void newInstance(Object o) throws IllegalAccessException, InvocationTargetException,
+            NamingException  {
+        // NO-OP
+    }
+
+    @Override
+    public void destroyInstance(Object o) throws IllegalAccessException, InvocationTargetException {
+    }
+
+    private Object prepareInstance(Object o) {
+        return o;
+    }
+}