Github user markap14 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/185#discussion_r51156891
--- Diff:
nifi-nar-bundles/nifi-scripting-bundle/nifi-scripting-processors/src/main/java/org/apache/nifi/processors/script/InvokeScriptProcessor.java
---
@@ -0,0 +1,835 @@
+/*
+ * 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.processors.script;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.nifi.annotation.behavior.DynamicProperty;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.SeeAlso;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.components.Validator;
+import org.apache.nifi.controller.ControllerServiceLookup;
+import org.apache.nifi.expression.AttributeExpression;
+import org.apache.nifi.logging.ProcessorLog;
+import org.apache.nifi.processor.AbstractSessionFactoryProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSessionFactory;
+import org.apache.nifi.processor.Processor;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.stream.io.ByteArrayInputStream;
+import org.apache.nifi.util.file.monitor.LastModifiedMonitor;
+import org.apache.nifi.util.file.monitor.SynchronousFileWatcher;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.ServiceLoader;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+@Tags({"script", "invoke", "groovy", "python", "jython", "jruby", "ruby",
"javascript", "js", "lua", "luaj", "scala"})
+@CapabilityDescription("Invokes a script engine for a Processor defined in
the given script. The script must define "
+ + "a valid class that implements the Processor interface, and it
must set a variable 'processor' to an instance of "
+ + "the class. Processor methods such as onTrigger() will be
delegated to the scripted Processor instance. Also any "
+ + "Relationships or PropertyDescriptors defined by the scripted
processor will be added to the configuration dialog.")
+@DynamicProperty(name = "A script engine property to update", value = "The
value to set it to", supportsExpressionLanguage = true,
+ description = "Updates a script engine property specified by the
Dynamic Property's key with the value specified by the Dynamic Property's
value")
+@SeeAlso({ExecuteScript.class})
+public class InvokeScriptProcessor extends AbstractSessionFactoryProcessor
{
+
+ public static final Relationship REL_SUCCESS = new
Relationship.Builder()
+ .name("success")
+ .description("FlowFiles that were successfully processed")
+ .build();
+
+ public static final Relationship REL_FAILURE = new
Relationship.Builder()
+ .name("failure")
+ .description("FlowFiles that were failed to process")
+ .build();
+
+
+ public static PropertyDescriptor SCRIPT_ENGINE;
+
+ public static final PropertyDescriptor SCRIPT_FILE = new
PropertyDescriptor.Builder()
+ .name("Script File")
+ .required(false)
+ .description("Path to script file to execute. Use either file
or body not both")
+ .addValidator(new StandardValidators.FileExistsValidator(true))
+ .expressionLanguageSupported(true)
+ .build();
+
+ public static final PropertyDescriptor SCRIPT_BODY = new
PropertyDescriptor.Builder()
+ .name("Script Body")
+ .required(false)
+ .description("Body to script to execute. Use either file or
body not both")
+ .addValidator(Validator.VALID)
+ .expressionLanguageSupported(true)
+ .build();
+
+ public static final PropertyDescriptor MODULES = new
PropertyDescriptor.Builder()
+ .name("Module Directory")
+ .description("Path to a directory which contains modules
required by the script.")
+ .required(false)
+ .expressionLanguageSupported(true)
+ .addValidator(new
StandardValidators.DirectoryExistsValidator(true, false))
+ .build();
+
+ // A map from engine name to a custom configurator for that engine
+ private final Map<String, ScriptEngineConfigurator>
scriptEngineConfiguratorMap = new ConcurrentHashMap<>();
+
+ private final AtomicReference<Processor> processor = new
AtomicReference<>();
+ private final AtomicReference<Collection<ValidationResult>>
validationResults =
+ new AtomicReference(Collections.EMPTY_LIST);
+
+ private ControllerServiceLookup controllerServiceLookup;
+ private String initializationContextId;
+
+ private final AtomicBoolean isInitialized = new AtomicBoolean(false);
+ private final Lock lock = new ReentrantLock();
+ private SynchronousFileWatcher scriptWatcher;
+
+ private Map<String, ScriptEngineFactory> scriptEngineFactoryMap;
+ private ScriptEngineManager scriptEngineManager;
+ private ScriptEngine scriptEngine;
+ private String scriptEngineName;
+ private String scriptPath;
+ private String modulePath;
+ private String scriptBody;
+
+ private ScheduledExecutorService reloadService = null;
+
+ private List<PropertyDescriptor> descriptors;
+
+ /**
+ * Creates the resources needed by this processor. An attempt is made
to also initialize the scripted processor,
+ * but unless the properties (such as script engine name and script
file path) have already been specified, the
+ * script will not yet have been evaluated, so the script's
initialize() method will not be called.
+ */
+ protected void createResources() {
+
+ // Set up script file reloader service. This checks to see if the
script file has changed, and if so, tries
+ // to reload it
+ if (reloadService == null) {
+ reloadService = Executors.newScheduledThreadPool(1);
+
+ // monitor the script if configured for changes
+ reloadService.scheduleWithFixedDelay(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ final boolean hasLock = lock.tryLock();
+
+ // if a property is changing we don't need to
reload this iteration
+ if (hasLock) {
+ try {
+ if (scriptWatcher != null &&
scriptWatcher.checkAndReset()) {
+ if (isFile(scriptPath)) {
+ // reload the actual script
+ final boolean reloaded =
reloadScriptFile(scriptPath);
+
+ // log the script was reloaded
+ if (reloaded) {
+ getLogger().info("The
configured script has been successfully reloaded.");
+ }
+ }
+ }
+ } finally {
+ lock.unlock();
+ }
+ }
+ } catch (final Throwable t) {
+ final ProcessorLog logger = getLogger();
+ final String message = "Unable to reload
configured script Processor: " + t;
+
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
+ logger.error(message, t);
+ }
+ }
+ }
+ }, 30, 10, TimeUnit.SECONDS);
+ }
+
+ descriptors = new ArrayList<>();
+
+ // The following is required for JRuby, should be transparent to
everything else
+ System.setProperty("org.jruby.embed.localvariable.behavior",
"persistent");
+
+ // Create list of available engines
+ scriptEngineManager = new ScriptEngineManager();
+ List<ScriptEngineFactory> scriptEngineFactories =
scriptEngineManager.getEngineFactories();
+ if (scriptEngineFactories != null) {
+ scriptEngineFactoryMap = new HashMap<>();
+ List<AllowableValue> engineList = new ArrayList<>();
+ for (ScriptEngineFactory factory : scriptEngineFactories) {
+ ScriptEngine engine = factory.getScriptEngine();
+ if (engine instanceof Invocable) {
+ engineList.add(new
AllowableValue(factory.getLanguageName()));
+ scriptEngineFactoryMap.put(factory.getLanguageName(),
factory);
+ }
+ }
+ // Sort the list by name so the list always looks the same.
+ Collections.sort(engineList, new Comparator<AllowableValue>() {
+ @Override
+ public int compare(AllowableValue o1, AllowableValue o2) {
+ if (o1 == null) {
+ return o2 == null ? 0 : 1;
+ }
+ if (o2 == null) {
+ return -1;
+ }
+ return o1.getValue().compareTo(o2.getValue());
+ }
+ });
+
+ AllowableValue[] engines = engineList.toArray(new
AllowableValue[engineList.size()]);
+ SCRIPT_ENGINE = new PropertyDescriptor.Builder()
+ .name("Script Engine")
+ .required(true)
+ .description("The engine to execute the scripted
Processor")
+ .allowableValues(engines)
+ .defaultValue(engines[0].getValue())
+ .required(true)
+ .expressionLanguageSupported(false)
+ .build();
+ descriptors.add(SCRIPT_ENGINE);
+ }
+
+ descriptors.add(SCRIPT_FILE);
+ descriptors.add(SCRIPT_BODY);
+ descriptors.add(MODULES);
+
+ isInitialized.set(true);
+ }
+
+ /**
+ * Returns the valid relationships for this processor. SUCCESS and
FAILURE are always returned, and if the script
+ * processor has defined additional relationships, those will be added
as well.
+ *
+ * @return a Set of Relationships supported by this processor
+ */
+ @Override
+ public Set<Relationship> getRelationships() {
+ final Set<Relationship> relationships = new HashSet<>();
+ final Processor instance = processor.get();
+ if (instance != null) {
+ try {
+ relationships.addAll(instance.getRelationships());
+ } catch (final Throwable t) {
+ final ProcessorLog logger = getLogger();
+ final String message = "Unable to get relationships from
scripted Processor: " + t;
+
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
+ logger.error(message, t);
+ }
+ }
+ } else {
+ // Return defaults for now
+ relationships.add(REL_SUCCESS);
+ relationships.add(REL_FAILURE);
+ }
+ return Collections.unmodifiableSet(relationships);
+ }
+
+ /**
+ * 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 (isInitialized) {
+ if (!isInitialized.get()) {
+ createResources();
+ }
+ }
+ List<PropertyDescriptor> supportedPropertyDescriptors = new
ArrayList<>();
+ supportedPropertyDescriptors.addAll(descriptors);
+
+ final Processor instance = processor.get();
+ if (instance != null) {
+ try {
+ final List<PropertyDescriptor> instanceDescriptors =
instance.getPropertyDescriptors();
+ if (instanceDescriptors != null) {
+
supportedPropertyDescriptors.addAll(instanceDescriptors);
+ }
+ } catch (final Throwable t) {
+ final ProcessorLog logger = getLogger();
+ final String message = "Unable to get property descriptors
from Processor: " + t;
+
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
+ logger.error(message, t);
+ }
+ }
+ }
+
+ return Collections.unmodifiableList(supportedPropertyDescriptors);
+ }
+
+ /**
+ * 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)
+ .required(false)
+
.addValidator(StandardValidators.createAttributeExpressionLanguageValidator(AttributeExpression.ResultType.STRING,
true))
+
.addValidator(StandardValidators.ATTRIBUTE_KEY_PROPERTY_NAME_VALIDATOR)
+ .expressionLanguageSupported(true)
+ .dynamic(true)
+ .build();
+ }
+
+ /**
+ * Determines whether the given path refers to a valid file
+ *
+ * @param path a path to a file
+ * @return true if the path refers to a valid file, false otherwise
+ */
+ private boolean isFile(final String path) {
+ return path != null && Files.isRegularFile(Paths.get(path));
+ }
+
+ /**
+ * Performs setup operations when the processor is scheduled to run.
This includes evaluating the processor's
+ * properties, as well as reloading the script (from file or the
"Script Body" property)
+ *
+ * @param context the context in which to perform the setup operations
+ */
+ @OnScheduled
+ public void setup(final ProcessContext context) {
+ scriptEngineName = context.getProperty(SCRIPT_ENGINE).getValue();
+ scriptPath = context.getProperty(SCRIPT_FILE).getValue();
+ scriptBody = context.getProperty(SCRIPT_BODY).getValue();
+ modulePath = context.getProperty(MODULES).getValue();
+ setupEngine();
+ if (processor.get() == null) {
+ if (isFile(scriptPath)) {
+ reloadScriptFile(scriptPath);
+ } else {
+ reloadScriptBody(scriptBody);
+ }
+ }
+ }
+
+ /**
+ * Configures the specified script engine. First, the engine is loaded
and instantiated using the JSR-223
+ * javax.script APIs. Then, if any script configurators have been
defined for this engine, their init() method is
+ * called, and the configurator is saved for future calls.
+ *
+ * @see org.apache.nifi.processors.script.ScriptEngineConfigurator
+ */
+ private void setupEngine() {
+ ClassLoader originalContextClassLoader =
Thread.currentThread().getContextClassLoader();
+ try {
+ ProcessorLog log = getLogger();
+
+ // Need the right classloader when the engine is created. This
ensures the NAR's execution class loader
+ // (plus the module path) becomes the parent for the script
engine
+ ClassLoader scriptEngineModuleClassLoader =
createScriptEngineModuleClassLoader(modulePath);
+ if (scriptEngineModuleClassLoader != null) {
+
Thread.currentThread().setContextClassLoader(scriptEngineModuleClassLoader);
+ }
+ scriptEngine = getScriptEngine();
+ ServiceLoader<ScriptEngineConfigurator>
configuratorServiceLoader =
+ ServiceLoader.load(ScriptEngineConfigurator.class);
+ for (ScriptEngineConfigurator configurator :
configuratorServiceLoader) {
+ String configuratorScriptEngineName =
configurator.getScriptEngineName();
+ try {
+ if (configuratorScriptEngineName != null
+ &&
configuratorScriptEngineName.equalsIgnoreCase(scriptEngineName)) {
+ configurator.init(scriptEngine, modulePath);
+
scriptEngineConfiguratorMap.put(configurator.getScriptEngineName(),
configurator);
+ }
+ } catch (ScriptException se) {
+ log.error("Error initializing script engine
configurator {}",
+ new Object[]{configuratorScriptEngineName});
+ if (log.isDebugEnabled()) {
+ log.error("Error initializing script engine
configurator", se);
+ }
+ }
+ }
+
+ } finally {
+ // Restore original context class loader
+
Thread.currentThread().setContextClassLoader(originalContextClassLoader);
+ }
+ }
+
+ /**
+ * Provides a ScriptEngine corresponding to the currently selected
script engine name.
+ * ScriptEngineManager.getEngineByName() doesn't use find
ScriptEngineFactory.getName(), which
+ * is what we used to populate the list. So just search the list of
factories until a match is
+ * found, then create and return a script engine.
+ *
+ * @return a Script Engine corresponding to the currently specified
name, or null if none is found.
+ */
+ private ScriptEngine getScriptEngine() {
+ //
+ ScriptEngineFactory factory =
scriptEngineFactoryMap.get(scriptEngineName);
+ if (factory == null) {
+ return null;
+ }
+ return factory.getScriptEngine();
+ }
+
+ /**
+ * Handles changes to this processor's properties. If changes are made
to script- or engine-related properties,
+ * the script will be reloaded.
+ *
+ * @param descriptor of the modified property
+ * @param oldValue non-null property value (previous)
+ * @param newValue the new property value or if null indicates the
property
+ */
+ @Override
+ public void onPropertyModified(final PropertyDescriptor descriptor,
final String oldValue, final String newValue) {
+ final ProcessorLog logger = getLogger();
+ final Processor instance = processor.get();
+
+ if (SCRIPT_FILE.equals(descriptor)
+ || SCRIPT_BODY.equals(descriptor)
+ || MODULES.equals(descriptor)
+ || SCRIPT_ENGINE.equals(descriptor)) {
+ lock.lock();
+ try {
+ // if the script is changing we'll want to reload the
instance
+ if (SCRIPT_FILE.equals(descriptor)) {
+ if (isFile(newValue)) {
+ reloadScriptFile(newValue);
+
+ // we're attempted to load the script so we need
to watch for updates
+ scriptWatcher = new
SynchronousFileWatcher(Paths.get(newValue), new LastModifiedMonitor());
+ } else {
+ // the doesn't appear to be a file
+ scriptWatcher = null;
+ }
+
+ // always want to record the configured value
+ scriptPath = newValue;
+ } else if (SCRIPT_BODY.equals(descriptor)) {
+
+ if (reloadScriptBody(newValue)) {
+ // always want to record the configured value
+ scriptBody = newValue;
+ }
+ } else if (MODULES.equals(descriptor)) {
+
+ // temporarily set new value (will be restored to
oldValue if something goes wrong)
+ modulePath = newValue;
+ try {
+ setupEngine();
+
+ boolean reloaded = false;
+
+ // we only want to reload during a module change
if the script is already loaded
+ if (scriptPath != null || scriptBody != null) {
+ if (isFile(scriptPath)) {
+ // reload the script
+ reloaded = reloadScriptFile(scriptPath);
+ } else if (scriptBody != null) {
+ reloaded = reloadScriptBody(scriptBody);
+ }
+ // log the script was reloaded
+ if (reloaded) {
+ logger.info("The configured script has
been successfully reloaded.");
+ } else {
+ throw new ProcessException("The configured
script could not be reloaded");
+ }
+ }
+ } catch (Throwable t) {
+ modulePath = oldValue;
+ logger.error(t.getLocalizedMessage(), t);
+ }
+
+ } else if (SCRIPT_ENGINE.equals(descriptor)) {
+ // The script engine has changed, so we need to set up
a new instance for the selected
+ // engine name
+ scriptEngineName = newValue;
+ setupEngine();
+ }
+ } finally {
+ lock.unlock();
+ }
+ } else if (instance != null) {
+ // If the script provides a Processor, call its
onPropertyModified() method
+ try {
+ instance.onPropertyModified(descriptor, oldValue,
newValue);
+ } catch (final Throwable t) {
+ final String message = "Unable to invoke
onPropertyModified from script Processor: " + t;
+
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
+ logger.error(message, t);
+ }
+ }
+ }
+ }
+
+ /**
+ * Creates a classloader to be used by the selected script engine and
the provided script file. This
+ * classloader has the InvokeScriptProcessor's classloader as a parent
(versus the current thread's context
+ * classloader) and also adds the specified module directory to the
classpath. This enables scripts
+ * to use other scripts, modules, etc. without having to build them
into the InvokeScriptProcessor NAR.
+ * If the parameter is null or empty, InvokeScriptProcessor's
classloader is returned
+ *
+ * @param modulePath The path to a directory containing modules to be
used by the script(s)
+ */
+ private ClassLoader createScriptEngineModuleClassLoader(String
modulePath) {
+ URLClassLoader newModuleClassLoader = null;
+ if (StringUtils.isEmpty(modulePath)) {
+ return InvokeScriptProcessor.class.getClassLoader();
+ }
+ try {
+ newModuleClassLoader =
+ new URLClassLoader(
+ new URL[]{new
File(modulePath).toURI().toURL()},
+ InvokeScriptProcessor.class.getClassLoader());
+ } catch (MalformedURLException mue) {
+ getLogger().error("Couldn't find modules directory at " +
modulePath, mue);
+ }
+ return newModuleClassLoader;
+ }
+
+
+ /**
+ * Reloads the script located at the given path
+ *
+ * @param scriptPath the path to the script file to be loaded
+ * @return true if the script was loaded successfully; false otherwise
+ */
+ private boolean reloadScriptFile(final String scriptPath) {
+ final Collection<ValidationResult> results = new HashSet<>();
+
+ try (final FileInputStream scriptStream = new
FileInputStream(scriptPath)) {
+ return reloadScriptFromReader(scriptStream);
+
+ } catch (final Throwable t) {
+ final ProcessorLog logger = getLogger();
+ final String message = "Unable to load script: " + t;
+
+ // If the module path has not yet been set, then this script
is likely being loaded too early and depends
+ // on modules the processor does not yet know about. If this
is the case, it will be reloaded later on
+ // property change (modules) or when scheduled
+ if (modulePath != null) {
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
+ logger.error(message, t);
+ }
+
+ results.add(new ValidationResult.Builder()
+ .subject("ScriptValidation")
+ .valid(false)
+ .explanation("Unable to load script due to " + t)
+ .input(scriptPath)
+ .build());
+ }
+ }
+
+ // store the updated validation results
+ validationResults.set(results);
+
+ // return whether there was any issues loading the configured
script
+ return results.isEmpty();
+ }
+
+ /**
+ * Reloads the script defined by the given string
+ *
+ * @param scriptBody the contents of the script to be loaded
+ * @return true if the script was loaded successfully; false otherwise
+ */
+ private boolean reloadScriptBody(final String scriptBody) {
+ final Collection<ValidationResult> results = new HashSet<>();
+ try (final ByteArrayInputStream scriptStream = new
ByteArrayInputStream(scriptBody.getBytes("UTF-8"))) {
+ return reloadScriptFromReader(scriptStream);
+
+ } catch (final Throwable t) {
+ final ProcessorLog logger = getLogger();
+ final String message = "Unable to load script: " + t;
+
+ // If the module path has not yet been set, then this script
is likely being loaded too early and depends
+ // on modules the processor does not yet know about. If this
is the case, it will be reloaded later on
+ // property change (modules) or when scheduled
+ if (modulePath != null) {
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
+ logger.error(message, t);
+ }
+
+ results.add(new ValidationResult.Builder()
+ .subject("ScriptValidation")
+ .valid(false)
+ .explanation("Unable to load script due to " + t)
+ .input(scriptPath)
+ .build());
+ }
+ }
+
+ // store the updated validation results
+ validationResults.set(results);
+
+ // return whether there was any issues loading the configured
script
+ return results.isEmpty();
+ }
+
+ /**
+ * Reloads the script Processor. This must be called within the lock.
+ *
+ * @param scriptStream An input stream associated with the script
content
+ * @returns Whether the script was successfully reloaded
+ */
+ private boolean reloadScriptFromReader(final InputStream scriptStream)
{
+ // note we are starting here with a fresh listing of validation
+ // results since we are (re)loading a new/updated script. any
+ // existing validation results are not relevant
+ final Collection<ValidationResult> results = new HashSet<>();
+
+ try {
+ // get the engine and ensure its invocable
+ if (scriptEngine instanceof Invocable) {
+ final Invocable invocable = (Invocable) scriptEngine;
+
+ // Find a custom configurator and invoke their eval()
method
+ ScriptEngineConfigurator configurator =
+ scriptEngineConfiguratorMap.get(scriptEngineName);
+ if (configurator != null) {
+ configurator.eval(scriptEngine, scriptStream,
modulePath);
+ } else {
+ // evaluate the script
+ scriptEngine.eval(new BufferedReader(new
InputStreamReader(scriptStream)));
+ }
+
+ // get configured processor from the script (if it exists)
+ final Object obj = scriptEngine.get("processor");
+ final ProcessorLog logger = getLogger();
+
+ try {
+ // set the logger if the processor wants it
+ invocable.invokeMethod(obj, "setLogger", logger);
+ } catch (final NoSuchMethodException nsme) {
+ if (logger.isDebugEnabled()) {
+ logger.debug("Configured script Processor does not
contain a setLogger method.");
+ }
+ }
+
+ // record the processor for use later
+ final Processor scriptProcessor =
invocable.getInterface(obj, Processor.class);
+ processor.set(scriptProcessor);
+
+ if (scriptProcessor != null) {
+ try {
+ scriptProcessor.initialize(new
ProcessorInitializationContext() {
+ @Override
+ public String getIdentifier() {
+ return
InvokeScriptProcessor.this.getIdentifier();
+ }
+
+ @Override
+ public ProcessorLog getLogger() {
+ return logger;
+ }
+
+ @Override
+ public ControllerServiceLookup
getControllerServiceLookup() {
+ return
InvokeScriptProcessor.super.getControllerServiceLookup();
+ }
+ });
+ } catch (final Exception e) {
+ logger.error("Unable to initialize scripted
Processor: " + e.getLocalizedMessage(), e);
+ throw new ProcessException(e);
+ }
+ }
+ }
+
+ } catch (final Exception ex) {
+ final ProcessorLog logger = getLogger();
+ final String message = "Unable to load script: " + ex;
+
+ // If the module path has not yet been set, then this script
is likely being loaded too early and depends
+ // on modules the processor does not yet know about. If this
is the case, it will be reloaded later on
+ // property change (modules) or when scheduled
+ //
+ // Alternatively, if the module is
+ if (modulePath != null) {
+ logger.error(message);
+ if (logger.isDebugEnabled()) {
--- End diff --
isDebugEnabled here too
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
