Maven file path arguments exec

Question

This is my file structure.

├── algs4-data
├── src
│   ├── main
│   └── test
└── target
    ├── classes
    ├── maven-archiver
    ├── surefire
    ├── surefire-reports
    └── test-classes

I want to pass the filename with path argument and pipe. But I failed, how can I do that?

mvn exec:java -Dexec.mainClass="edu.princeton.cs.algs4.BinarySearch" \
   -Dexec.args="algs4-data/tinyW.txt < algs4-data/tinyT.txt"

Update: Log information

And it only show this and I have to press Ctrl-C

➜  java_algs4 git:(master) ✗ mvn exec:java -Dexec.mainClass="edu.princeton.cs.algs4.BinarySearch" \
>    -Dexec.args="algs4-data/tinyW.txt < algs4-data/tinyT.txt"
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building algs4 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- exec-maven-plugin:1.5.0:java (default-cli) @ algs4 ---

Update 06/15/2016

Thanks Mr.Baumgartner suggestion I moved data to /src/main/resources

But when I run the code, it gives warning and build failure.

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building algs4 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- exec-maven-plugin:1.5.0:java (default-cli) @ algs4 ---
[WARNING]
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:294)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Could not open algs4-data/tinyW.txt
    at edu.princeton.cs.algs4.In.<init>(In.java:194)
    at edu.princeton.cs.algs4.BinarySearch.main(BinarySearch.java:91)
    ... 6 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.821s
[INFO] Finished at: Wed Jun 15 09:29:50 CDT 2016
[INFO] Final Memory: 12M/94M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.5.0:java (default-cli) on project algs4: An exception occured while executing the Java class. null: InvocationTargetException: Could not open algs4-data/tinyW.txt -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

The update file structure.

.
├── src
│   ├── main
│   │   ├── java
│   │   │   └── edu
│   │   └── resources
│   │       └── algs4-data
│   └── test
│       └── java
│           └── edu
└── target
    ├── classes
    │   ├── algs4-data
    │   └── edu
    │       └── princeton
    ├── maven-archiver
    ├── site
    │   ├── css
    │   └── images
    │       └── logos
    ├── surefire
    ├── surefire-reports
    └── test-classes
        └── edu
            └── princeton

What was the error message? Can you post your Maven logs?

Tunaki
– Tunaki

2016-06-14 21:49:21 +00:00
Commented Jun 14, 2016 at 21:49 — Tunaki
– Tunaki, Commented Jun 14, 2016 at 21:49

Martin Baumgartner · Accepted Answer · 2016-06-15 07:38:27Z

2

Using your file-structure algs4-data is not visible. When you launch your application, the root of the exection is the target folder. By not putting algs4-data into a src folder like /src/main/resources it wont be copied into the target/classes.

Solution which should work imo without knowing your code nor testing: Copy algs4-data to src/main/resources.

answered Jun 15, 2016 at 7:38

Martin Baumgartner

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8 Comments

yuxuan Over a year ago

Thanks, I do your suggestion, but my build fail and I update my question.

Martin Baumgartner Over a year ago

Is algs4-data/tinyW.txt in target/classes?

yuxuan Over a year ago

Yes (I update the file structure), may be it is because I use pipe in the argument?

Martin Baumgartner Over a year ago

Can you put your project on github that i can try to run it?

yuxuan Over a year ago

Thanks, I put it on [email protected]:yu-yuxuan/algs4_exercise.git github.com/yu-yuxuan/algs4_exercise

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