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https://issues.apache.org/jira/browse/NIFI-210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15116470#comment-15116470
]
ASF GitHub Bot commented on NIFI-210:
-------------------------------------
Github user joewitt commented on a diff in the pull request:
https://github.com/apache/nifi/pull/185#discussion_r50785263
--- Diff:
nifi-nar-bundles/nifi-scripting-bundle/nifi-scripting-processors/src/main/java/org/apache/nifi/processors/script/ExecuteScript.java
---
@@ -0,0 +1,585 @@
+/*
+ * 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.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.Validator;
+import org.apache.nifi.expression.AttributeExpression;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.logging.ProcessorLog;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.processor.AbstractProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+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.StopWatch;
+import org.apache.nifi.util.file.monitor.LastModifiedMonitor;
+import org.apache.nifi.util.file.monitor.SynchronousFileWatcher;
+
+import javax.script.Bindings;
+import javax.script.Compilable;
+import javax.script.CompiledScript;
+import javax.script.ScriptContext;
+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.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+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.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+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.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+@Tags({"script", "execute", "groovy", "python", "jython", "jruby", "ruby",
"javascript", "js", "lua", "luaj", "scala"})
+@CapabilityDescription("Executes a script given the flow file and a
process session. The script is responsible for "
+ + "handling the incoming flow file (transfer to SUCCESS or remove,
e.g.) as well as any flow files created by "
+ + "the script. If the handling is incomplete or incorrect, the
session will be rolled back.")
+@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")
+public class ExecuteScript extends AbstractProcessor {
+
+ 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()
--- End diff --
That could be implemented using the onPropertyModified construct whereby if
the value of the engine chosen is changed the script-body is automatically
changed provided the current script-body text matches the default for the
previous engine. We could a default 'hello world' script for each engine.
Definitely like that idea. Perhaps a follow-on JIRA...
> Provide an ExecuteScript processor
> ----------------------------------
>
> Key: NIFI-210
> URL: https://issues.apache.org/jira/browse/NIFI-210
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Affects Versions: 0.0.1
> Reporter: A. Steven Anderson
> Assignee: Matt Burgess
> Labels: processor, scala
> Fix For: 0.5.0
>
> Attachments:
> 0001-NIFI-210-few-tweaks-to-drop-static-reference-and-fix.patch
>
>
> Add latest Scala version support for ExcecuteScript processor.
> Should also support Clojure as per discussion and request on mailing list
> http://mail-archives.apache.org/mod_mbox/nifi-dev/201506.mbox/%3CCAMpSqch4GK1gnw6M1u8tH6AN8e_miXZN5SNkAeMjBujXYGqJiw%40mail.gmail.com%3E
> UPDATE: The ScriptEngine for Clojure is not being maintained and is not
> currently available via Maven Central or a public repository. Recommend
> adding Clojure as a separate Improvement Jira case.
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