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Is there any way to automatically setting windows path in a string in groovy?

My project root directory is:
D:/Project/Node_Project
I am using a gradle plugin to install nodejs temporarily in my project root directory so that some nodejs command can run in the project while the thoject builds. The plugin is as below:
plugins {
id "com.github.node-gradle.node" version "2.2.4"
}
node {
download = true
version = "10.10.0"
distBaseUrl = 'https://nodejs.org/dist'
workDir = file("${project.buildDir}/nodejs")
}
So, nodejs is getting installed inside the project in the location:
D:/Project/Node_Project/build/nodejs/node-v10.10.0-win-x64
Now, I am using a .execute(String[] "path to set at environment variable", String path of file to be executed which is in the project root directory) method to run a windows command with node dependency. Code below:
cmd = "node connect.js"
def process = cmd.execute(["PATH=${project.projectDir}/build/nodejs/node-v10.10.0-win-x64"],null)
In the above .execute method, is there a way to auto-populate the "build/nodejs/node-v10.10.0-win-x64" part of the string instead of hardcoding it into the method?
Something like:
def process = cmd.execute(["PATH=${project.projectDir}/.*"],null)
Syntax of .execute method:
https://docs.groovy-lang.org/latest/html/groovy-jdk/java/lang/String.html#execute(java.lang.String[],%20java.io.File)
All the codes are inside "build.gradle" file. Please help!

I asked why you don't just write a task of type NodeTask, but I understand that you like to run a it in the background, which you can't do with that.
You could list the content of a directory and use that as part of the command. But you could also just grab it from the extension provided by the plugin.
This is not documented and it might break in future releases of the plugin, but you can do something like this (Groovy DSL):
task connectJS {
dependsOn nodeSetup
doFirst {
def connectProcess = "$node.variant.nodeExec $projectDir/src/js/connect.js".execute()
// Blocking readers (if async, pipe to a log file instead)
connectProcess.in.eachLine { logger.info(it) }
connectProcess.err.eachLine { logger.err(it) }
}
}

Missing resolveStrategy breaks DSL when executed from runnable jar

I'm using the Groovy Spreadsheet Builder within one of my Grails projects to export some data as Excel file.
Everything works great until I create a runnable jar (using gradle assemble) and use this.
I'm using the builder within a service like this:
class ExcelService {
...
void export(OutputStream outputStream) {
...
PoiSpreadsheetBuilder.create(outputStream).build {
apply ExcelStylesheet
...
}
}
...
}
When I try to export my data from the app started using the generated jar I will get the following MissingMethodException:
groovy.lang.MissingMethodException: No signature of method: my.package.ExcelService.apply() is applicable for argument types: (java.lang.Class)
The (Java) interface of SpreadsheetBuilder looks like this:
public interface SpreadsheetBuilder {
void build(#DelegatesTo(strategy = Closure.DELEGATE_FIRST, value = WorkbookDefinition.class) #ClosureParams(value = FromString.class, options = "builders.dsl.spreadsheet.builder.api.WorkbookDefinition") Configurer<WorkbookDefinition> workbookDefinition);
}
While debugging the execution of the code and the jar I found the difference while stepping through invokeMethod() of ClosureMetaClass.
When closure.getResolveStrategy(); in the working version is called Closure.DELEGATE_FIRST will be returned. Debugging the jar, the result will be 0 so that the MissingMethodException will be thrown later due to the wrong resolve strategy.
For now I have no idea how to solve this problem.
What is/could be the reason for this behavior?
What can I do to solve this issue?
I'm using Grails 3.3.8 with Java OpenJDK 1.8.0_192.

If you don't need to support JDK 7, you could upgrade to Groovy Spreadsheet Builder 2.0.0.RC1 which is only JDK 8 compatible but appears to solve the problem.

#ClosureParams and #DelegatesTo are applicable to parameters of type groovy.lang.Closure. In this case, you have applied it to Configurer<WorkbookDefinition>.

Using rsync4j library, a Java implementation of Linux rsync tool, how to sync data from a remote directory with a local directory

I need the functionality like that of the rsync linux tool in my Java program. For that, I chose the rsync4j library.
Using their documentation, I wrote the following program:
import com.github.fracpete.processoutput4j.output.ConsoleOutputProcessOutput;
import com.github.fracpete.rsync4j.RSync;
public class MainClass {
public static void main(String [] args) {
System.out.println("Started");//check
RSync rsync = new RSync()
.source("/home/arth/DataSourceFolder/a.txt")
.destination("/home/arth/DataDestinationFolder/")
.recursive(true);
// or if you prefer using commandline options:
// rsync.setOptions(new String[]{"-r", "/one/place/", "/other/place/"});
CollectingProcessOutput output = null;
try {
System.out.println("Inside try");
output = rsync.execute();
System.out.println("End of try");
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(output.getStdOut());
System.out.println("Exit code: " + output.getExitCode());
if (output.getExitCode() > 0)
System.err.println(output.getStdErr());
}
}
In the snippet, in out local machine, a file a.txt is copied from one location to another. This works perfectly. The file is successfully copied when I run it and here is the output:
Started
Inside try
End of try
Exit code: 0
But my need is to sync a local directory with a directory lying at a remote host/machine. When I tried to do it using a simple rsync command from a terminal using the following command
rsync remoteUserName#23.24.25.244:/home/beth/remoteFolder/a.png /home/arth/DataSourceFolder
it works like a charm. a.png IS copied to local machine at path specified, although a password of remote machine is asked first.
But the problem when I use the above Java program to do the same operation, by replacing line # 11 and 12 by:
.source("remoteUserName#23.24.25.244:/home/beth/remoteFolder/a.png")
.destination("/home/arth/DataDestinationFolder/")
the program gets stuck after printing Started in the console. Neither an exception is thrown nor does the program proceed.
The question is that how do I fix this problem?

(old post, I know, but here it goes...) The rsync4j library does not allow interaction. In your case, the underlying rysnc binary prompts for a password in the process that the Java library created, but never receives one.
Starting with release 3.2.3-7, you can supply an instance of the sshpass wrapper to feed in the password (see this comment for an example).

Java AWS Lambda - Jmagick

I am trying to use Jmagick in my AWS Lambda Java code. So far I have done following:
Compiled ImageMagick and Jmagick source on Amazon Linux EC2 and generated .so libraries.
Wrote following code for my Java Lambda on my Windows PC (using ImageMagick and Jmagick for windows).
public String handleRequest(Object input, Context context)
{
System.setProperty("jmagick.systemclassloader","false");
try {
ImageInfo newImageiInfo=new ImageInfo();
newImageiInfo.setFileName("/tmp/oldImage.jpg");
newImageiInfo.setSize("512x512");
newImageiInfo.setUnits(ResolutionType.PixelsPerInchResolution);
newImageiInfo.setColorspace(ColorspaceType.RGBColorspace);
newImageiInfo.setBorderColor(PixelPacket.queryColorDatabase("red"));
newImageiInfo.setDepth(8);
MagickImage addTextImage = new MagickImage();
addTextImage.allocateImage(newImageiInfo);
addTextImage.setYResolution(480);
addTextImage.setXResolution(640);
addTextImage.writeImage(newImageiInfo);
DrawInfo aInfo = new DrawInfo(newImageiInfo);
aInfo.setFont("Arial");
aInfo.setTextAntialias(true);
aInfo.setText("JMagick Tutorial");
addTextImage.annotateImage(aInfo);
addTextImage.setFileName("/tmp/newImage.jpg");
addTextImage.writeImage(newImageiInfo);
}catch (MagickException e) {
e.printStackTrace();
}
UploadtoS3("/tmp/newImage.jpg"); // a simple method for Uploading
return "Hello from Lambda!";
}
Packaged the .so libraries into Lambda deployment package (I am using jar as deployment package).
The code works fine on my PC, but on Lambda it is not generating any image file. Logically there should be one generated at /tmp/newImage.jpg. Also I cannot see any Exception/error in the Lambda logs which.
Is there anything I am doing wrong? What can I do further? If anyone especially with experience in ImagaMagick and Lambda could help, I will be thankful.

ReferenceError: "alert" is not defined

I am trying to call a java script function from java code.
Here is my Java code
public static void main(String[] args) throws FileNotFoundException {
try {
/**
* To call a anonymous function from java script file
*/
ScriptEngine engine = new ScriptEngineManager()
.getEngineByName("javascript");
FileReader fr = new FileReader("src/js/MySpec.js");
engine.eval(fr);
} catch (ScriptException scrEx) {
scrEx.printStackTrace();
}
}
Here is my java script file:
(function() {
alert("Hello World !!!");
})();
But when I run main method of driver class it is giving me error as below:
Exception in thread "main" javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "alert" is not defined. (<Unknown source>#2) in <Unknown source> at line number 2
at com.sun.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:110)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:232)
at Java6RhinoRunner.load(Java6RhinoRunner.java:42)
at Java6RhinoRunner.main(Java6RhinoRunner.java:12)
What I know is that it need some script engine to execute it.
For that I added rhino.jar file in to my class path.But this is not working.
I an not getting how to solve this error.
Please help.Thanks in advance.

alert is not part of JavaScript, it's part of the window object provided by web browsers. So it doesn't exist in the context you're trying to use it in. (This is also true of setInterval, setTimeout, and other timer-related stuff, FYI.)
If you just want to do simple console output, Rhino provides a print function to your script, so you could replace alert with print. Your script also has access to all of the Java classes and such, so for instance java.lang.System.out.println('Hello'); would work from your JavaScript script (although it's a bit redundant with the provided print function). You can also make Java variables available to your script easily via ScriptEngine.put, e.g:
engine.put("out", System.out);
...and then in your script:
out.println('Hello from JavaScript');
...so that's a third way to do output from the script. :-)
See the discussion in the javax.script package documentation, in particular ScriptEngine#put, or for more complex cases, Bindings (and SimpleBindings) and ScriptContext.