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java/org/apache/jasper/runtime/InstanceManagerFactory.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.jasper.runtime;
+
+import javax.servlet.ServletConfig;
+
+import org.apache.tomcat.InstanceManager;
+
+public class InstanceManagerFactory {
+
+    private InstanceManagerFactory() {
+    }
+
+    public static InstanceManager getInstanceManager(ServletConfig config) {
+        InstanceManager instanceManager =
+                (InstanceManager) config.getServletContext().getAttribute(InstanceManager.class.getName());
+        if (instanceManager == null) {
+            throw new IllegalStateException("No org.apache.tomcat.InstanceManager set in ServletContext");
+        }
+        return instanceManager;
+    }
+
+}