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‎.gitignore‎

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.gradle/
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.idea/
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build/
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*.iml
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NOTES.md

‎LICENSE.txt‎

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‎README.md‎

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NiFi-Scripting
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--------------
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NiFi Dynamic Script Executors
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```python
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Work-in-Progress
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```
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The goal of this project is to enable processing NiFi *FlowFiles* using scripting languages.
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1. **ExecuteJavaScript** Usage: JSON -> Mapping -> JSON
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2. **ExecuteGroovy**
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### Install
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1. Manual: Download [Apache NiFi](https://nifi.apache.org/download.html) binaries and unpack to a folder.
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2. On Mac: brew install nifi
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### Deploy
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```bash
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# Assume you unpacked nifi-0.3.0-bin.zip to /Developer/Applications/nifi
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./gradlew clean deploy -Pnifi_home=/Developer/Applications/nifi
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```
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On Mac
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```bash
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gradle clean deploy -Pnifi_home=/usr/local/Cellar/nifi/0.3.0/libexec
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```
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### Run
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```bash
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cd /Developer/Applications/nifi
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./bin/nifi.sh start
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./bin/nifi.sh stop
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```
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On Mac
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```bash
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# nifi start|stop|run|restart|status|dump|install
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nifi start
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nifi status
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nifi stop
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# Working Directory: /usr/local/Cellar/nifi/0.3.0/libexec
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```
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### Test
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```js
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function convert(val) {
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var g = JSON.parse(val);
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var d = {
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widget: g.widget.window.title,
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imageURI: g.widget.image.src
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};
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return JSON.stringify(d);
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}
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print("Hello from inside scripting!");
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var fs = util.flowFileToString(flowFile, session);
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log.error(fs);
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var flowString = convert(fs);
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log.error(flowString);
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//flowFile = session.importFrom(buff, true, flowFile);
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session.remove(flowFile);
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flowFile = util.stringToFlowFile(flowString, session);
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flowFile = session.putAttribute(flowFile, "JS", 2222 );
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```
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### TODO
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### Reference
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1. [Groovy Script](http://www.groovy-lang.org/integrating.html)
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2. [java8-nashorn-tutorial](http://winterbe.com/posts/2014/04/05/java8-nashorn-tutorial/)

‎build.gradle‎

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description = 'NiFi Dynamic Script Executor'
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group = 'nifi-scripting'
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apply plugin: 'idea'
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//apply plugin: 'java'
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apply plugin: 'groovy'
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apply plugin: 'de.fanero.gradle.plugin.nar'
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sourceCompatibility=1.8
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targetCompatibility=1.8
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buildscript {
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repositories {
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mavenCentral()
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maven {
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url 'http://dl.bintray.com/sponiro/gradle-plugins'
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}
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}
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dependencies {
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classpath group: 'de.fanero.gradle.plugin.nar', name: 'gradle-nar-plugin', version: '0.1'
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}
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}
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repositories {
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mavenCentral()
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}
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dependencies {
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// compile 'commons-io:commons-io:2.2'
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compile 'org.codehaus.groovy:groovy-all:2.4.5'
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compile 'org.apache.nifi:nifi-api:0.3.0'
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compile 'org.apache.nifi:nifi-processor-utils:0.3.0'
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testCompile 'org.apache.nifi:nifi-mock:0.3.0'
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testCompile 'junit:junit:4.+'
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testCompile 'org.slf4j:slf4j-simple:1.7.12'
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}
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task deploy(dependsOn: 'nar', type: Copy) {
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description 'Deploys assembled "nar" archive to Apache NiFi installation. Will call "nar" task to assemble nar archive.'
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if (project.hasProperty('nifi_home')) {
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from 'build/libs/'
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into nifi_home + '/lib'
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include ('*.nar')
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println("Deploying '" + project.name + "' to " + (nifi_home + '/lib'))
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}
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else {
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if (gradle.startParameter.taskNames.toString().contains('deploy')){
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throw new java.lang.IllegalArgumentException("Failed to determine the value of 'nifi_home' property. Possible reasons: " +
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"Property is not defined. You can define it in either 'gradle.properties' file or via command line argument 'gradlew deploy -Pnifi_home=/foo/bar/nifi'.")
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}
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}
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}
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task wrapper(type: Wrapper) {
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description = 'Generates gradlew[.bat] scripts'
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}

‎gradle.properties‎

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version=0.1.0-SNAPSHOT

‎gradle/wrapper/gradle-wrapper.jar‎

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‎gradle/wrapper/gradle-wrapper.properties‎

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#Sat Sep 26 10:00:13 PDT 2015
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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-2.7-all.zip

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