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java/org/apache/catalina/mbeans/ContextResourceLinkMBean.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.catalina.mbeans;
+
+import javax.management.Attribute;
+import javax.management.AttributeNotFoundException;
+import javax.management.MBeanException;
+import javax.management.ReflectionException;
+import javax.management.RuntimeOperationsException;
+
+import org.apache.tomcat.util.descriptor.web.ContextResourceLink;
+import org.apache.tomcat.util.descriptor.web.NamingResources;
+
+/**
+ * <p>A <strong>ModelMBean</strong> implementation for the
+ * <code>org.apache.tomcat.util.descriptor.web.ContextResourceLink</code> component.</p>
+ *
+ * @author Amy Roh
+ */
+public class ContextResourceLinkMBean extends BaseCatalinaMBean<ContextResourceLink> {
+
+    /**
+     * Obtain and return the value of a specific attribute of this MBean.
+     *
+     * @param name Name of the requested attribute
+     *
+     * @exception AttributeNotFoundException if this attribute is not
+     *  supported by this MBean
+     * @exception MBeanException if the initializer of an object
+     *  throws an exception
+     * @exception ReflectionException if a Java reflection exception
+     *  occurs when invoking the getter
+     */
+    @Override
+    public Object getAttribute(String name) throws AttributeNotFoundException, MBeanException,
+            ReflectionException {
+
+        // Validate the input parameters
+        if (name == null) {
+            throw new RuntimeOperationsException(
+                    new IllegalArgumentException("Attribute name is null"),
+                    "Attribute name is null");
+        }
+
+        ContextResourceLink cl = doGetManagedResource();
+
+        String value = null;
+        if ("global".equals(name)) {
+            return cl.getGlobal();
+        } else if ("description".equals(name)) {
+            return cl.getDescription();
+        } else if ("name".equals(name)) {
+            return cl.getName();
+        } else if ("type".equals(name)) {
+            return cl.getType();
+        } else {
+            value = (String) cl.getProperty(name);
+            if (value == null) {
+                throw new AttributeNotFoundException("Cannot find attribute [" + name + "]");
+            }
+        }
+
+        return value;
+    }
+
+
+    /**
+     * Set the value of a specific attribute of this MBean.
+     *
+     * @param attribute The identification of the attribute to be set
+     *  and the new value
+     *
+     * @exception AttributeNotFoundException if this attribute is not
+     *  supported by this MBean
+     * @exception MBeanException if the initializer of an object
+     *  throws an exception
+     * @exception ReflectionException if a Java reflection exception
+     *  occurs when invoking the getter
+     */
+     @Override
+    public void setAttribute(Attribute attribute) throws AttributeNotFoundException, MBeanException,
+            ReflectionException {
+
+        // Validate the input parameters
+        if (attribute == null) {
+            throw new RuntimeOperationsException(
+                    new IllegalArgumentException("Attribute is null"),
+                    "Attribute is null");
+        }
+
+        String name = attribute.getName();
+        Object value = attribute.getValue();
+        if (name == null) {
+            throw new RuntimeOperationsException(
+                    new IllegalArgumentException("Attribute name is null"),
+                    "Attribute name is null");
+        }
+
+        ContextResourceLink crl = doGetManagedResource();
+
+        if ("global".equals(name)) {
+            crl.setGlobal((String) value);
+        } else if ("description".equals(name)) {
+            crl.setDescription((String) value);
+        } else if ("name".equals(name)) {
+            crl.setName((String) value);
+        } else if ("type".equals(name)) {
+            crl.setType((String) value);
+        } else {
+            crl.setProperty(name, "" + value);
+        }
+
+        // cannot use side-effects.  It's removed and added back each time
+        // there is a modification in a resource.
+        NamingResources nr = crl.getNamingResources();
+        nr.removeResourceLink(crl.getName());
+        nr.addResourceLink(crl);
+    }
+}