Github user mattyb149 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1045#discussion_r85119526
--- Diff:
nifi-nar-bundles/nifi-scripting-bundle/nifi-scripting-processors/src/main/java/org/apache/nifi/reporting/script/ScriptedReportingTask.java
---
@@ -0,0 +1,197 @@
+/*
+ * 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.nifi.reporting.script;
+
+import com.yammer.metrics.core.VirtualMachineMetrics;
+import org.apache.commons.io.IOUtils;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.logging.ComponentLog;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.processors.script.ScriptEngineConfigurator;
+import org.apache.nifi.processors.script.ScriptUtils;
+import org.apache.nifi.reporting.AbstractReportingTask;
+import org.apache.nifi.reporting.ReportingContext;
+import org.apache.nifi.util.StringUtils;
+
+import javax.script.Bindings;
+import javax.script.ScriptContext;
+import javax.script.ScriptEngine;
+import javax.script.ScriptException;
+import javax.script.SimpleBindings;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A Reporting task whose body is provided by a script (via supported
JSR-223 script engines)
+ */
+@Tags({"reporting", "script", "execute", "groovy", "python", "jython",
"jruby", "ruby", "javascript", "js", "lua", "luaj"})
+@CapabilityDescription("Provides reporting and status information to a
script. ReportingContext, ComponentLog, and VirtualMachineMetrics objects are
made available "
+ + "as variables (context, log, and vmMetrics, respectively) to the
script for further processing. The context makes various information available
such "
+ + "as events, provenance, bulletins, controller services, process
groups, Java Virtual Machine metrics, etc.")
+public class ScriptedReportingTask extends AbstractReportingTask {
+
+ protected volatile ScriptUtils scriptUtils = new ScriptUtils();
+ protected volatile String scriptToRun = null;
+ protected volatile VirtualMachineMetrics vmMetrics;
+
+ /**
+ * Returns a list of property descriptors supported by this processor.
The list always includes properties such as
+ * script engine name, script file name, script body name, script
arguments, and an external module path. If the
+ * scripted processor also defines supported properties, those are
added to the list as well.
+ *
+ * @return a List of PropertyDescriptor objects supported by this
processor
+ */
+ @Override
+ protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
+ synchronized (scriptUtils.isInitialized) {
+ if (!scriptUtils.isInitialized.get()) {
+ scriptUtils.createResources();
+ }
+ }
+
+ return Collections.unmodifiableList(scriptUtils.descriptors);
+ }
+
+ /**
+ * Returns a PropertyDescriptor for the given name. This is for the
user to be able to define their own properties
+ * which will be available as variables in the script
+ *
+ * @param propertyDescriptorName used to lookup if any property
descriptors exist for that name
+ * @return a PropertyDescriptor object corresponding to the specified
dynamic property name
+ */
+ @Override
+ protected PropertyDescriptor
getSupportedDynamicPropertyDescriptor(final String propertyDescriptorName) {
+ return new PropertyDescriptor.Builder()
+ .name(propertyDescriptorName)
--- End diff --
This is a good point and applies everywhere for dynamic properties, I think
we should file a Jira to investigate.
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