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Chapter 2. Getting started

Prerequisites

  • OpenJDK 1.8, OpenJDK 11, Oracle JDK 1.8, or Oracle JDK 11
  • 8 GB RAM
  • If you are installing on macOS, the value of maxproc must be 2048 or greater.

Procedure

  1. Extract the .zip file to a directory of your choice.

    Note

    If you are installing on a Windows operating system:

    1. Extract the .zip file to a folder named mta to avoid a Path too long error.
    2. If a Confirm file replace window is displayed during extraction, click Yes to all.

    The installation directory is referred to as <MTA_HOME> in this guide.

2.1. Running the CLI
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You can run MTA against your application.

Procedure

  1. Open a terminal and navigate to the <MTA_HOME>/bin/ directory.

  2. Execute the mta-cli script, or mta-cli.bat for Windows, and specify the appropriate arguments: 

    $ ./mta-cli --input /path/to/jee-example-app-1.0.0.ear --output /path/to/output --source weblogic --target eap:6 --packages com.acme org.apache
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    • --input: The application to be evaluated.
    • --output: The output directory for the generated reports.
    • --source: The source technology for the application migration.
    • --target: The target technology for the application migration.
    • --packages: The packages to be evaluated. This argument is highly recommended to improve performance.
  3. Access the report.

MTA Command examples

Running MTA on an application archive

The following command analyzes the com.acme and org.apache packages of the jee-example-app-1.0.0.ear example EAR archive for migrating from JBoss EAP 5 to JBoss EAP 7: 

$ <MTA_HOME>/bin/mta-cli --input /path/to/jee-example-app-1.0.0.ear --output /path/to/report-output/ --source eap:5 --target eap:7 --packages com.acme org.apache
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Running MTA on source code

The following command analyzes the org.jboss.seam packages of the seam-booking-5.2 example source code for migrating to JBoss EAP 6. 

$ <MTA_HOME>/bin/mta-cli --sourceMode --input /path/to/seam-booking-5.2/ --output /path/to/report-output/ --target eap:6 --packages org.jboss.seam
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Running cloud-readiness rules

The following command analyzes the com.acme and org.apache packages of the jee-example-app-1.0.0.ear example EAR archive for migrating to JBoss EAP 7. It also evaluates for cloud readiness: 

$ <MTA_HOME>/bin/mta-cli --input /path/to/jee-example-app-1.0.0.ear --output /path/to/report-output/ --target eap:7 --target cloud-readiness --packages com.acme org.apache
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Overriding MTA properties

To override the default Fernflower decompiler, pass the -Dwindup.decompiler argument on the command line. For example, to use the Procyon decompiler, use the following syntax: 

$ <MTA_HOME>/bin/mta-cli -Dwindup.decompiler=procyon --input <INPUT_ARCHIVE_OR_DIRECTORY> --output <OUTPUT_REPORT_DIRECTORY> --target <TARGET_TECHNOLOGY> --packages <PACKAGE_1> <PACKAGE_2>
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About MTA CLI bash completion

The MTA CLI provides an option to enable bash completion for Linux systems, allowing the MTA command-line arguments to be auto completed by pressing the Tab key when entering the commands. For instance, when bash completion is enabled, entering the following displays a list of available arguments. 

$ <MTA_HOME>/bin/mta-cli [TAB]
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Enabling bash completion

To enable bash completion for the current shell, execute the following command. After the prompt returns, follow the steps for using the CLI. 

$ source <MTA_HOME>/bash-completion/mta-cli
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Enabling persistent bash completion

The following commands allow bash completion to persist across restarts:

  • To enable bash completion for a specific user across system restarts, include the following line in that user’s ~/.bashrc file. 

    source <MTA_HOME>/bash-completion/mta-cli
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  • To enable bash completion for all users across system restarts, copy the Migration Toolkit for Applications CLI bash completion file to the /etc/bash_completion.d/ directory. By default, this directory is only writable by the root user. 

    # cp <MTA_HOME>/bash-completion/mta-cli /etc/bash_completion.d/
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Accessing MTA help

To see the complete list of available arguments for the mta-cli command, open a terminal, navigate to the <MTA_HOME> directory, and execute the following command: 

$ <MTA_HOME>/bin/mta-cli --help
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2.2. Accessing reports
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When you run the Migration Toolkit for Applications, a report is generated in the <OUTPUT_REPORT_DIRECTORY> that you specify using the --output argument in the command line.

The output directory contains the following files and subdirectories: 

<OUTPUT_REPORT_DIRECTORY>/
├── index.html          // Landing page for the report
├── <EXPORT_FILE>.csv   // Optional export of data in CSV format
├── archives/           // Archives extracted from the application
├── mavenized/          // Optional Maven project structure
├── reports/            // Generated HTML reports
├── stats/              // Performance statistics
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Procedure

  1. Obtain the path of the index.html file of your report from the output that appears after you run MTA: 

    Report created: <OUTPUT_REPORT_DIRECTORY>/index.html
              Access it at this URL: file:///<OUTPUT_REPORT_DIRECTORY>/index.html
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  2. Open the index.html file by using a browser.

    The generated report is displayed.

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