Class ModuleSystemExamples

java.lang.Object

net.jrodolfo.java_evolution.java09.module_system.ModuleSystemExamples

public class ModuleSystemExamples
extends Object

Demonstrates the Java Platform Module System (JPMS), introduced in Java 9.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ModuleSystemExamples.CommandResult	Captures child process output.

Constructor Summary

Constructors

Constructor	Description
ModuleSystemExamples()

Method Summary

Modifier and Type	Method	Description
ModuleSystemExamples.CommandResult	compileModules(Path sourceRoot, Path moduleOutputDirectory)	Compiles all module source files under a module source root.
void	createModularSourceTree(Path sourceRoot)	Creates a small modular source tree with one library module and one application module.
void	createSourceTreeWithInternalPackageAccess(Path sourceRoot)	Creates a modular source tree where the app module incorrectly imports an unexported package from the greetings module.
ModuleSystemExamples.CommandResult	runApplicationModule(Path moduleOutputDirectory)	Runs the modular application.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ModuleSystemExamples

public ModuleSystemExamples()

Method Details

createModularSourceTree

public void createModularSourceTree(Path sourceRoot)
                             throws IOException

Creates a small modular source tree with one library module and one application module.

Parameters:

sourceRoot - root directory for the module source tree

Throws:

IOException - when source files cannot be written

createSourceTreeWithInternalPackageAccess

public void createSourceTreeWithInternalPackageAccess(Path sourceRoot)
                                               throws IOException

Creates a modular source tree where the app module incorrectly imports an unexported package from the greetings module.

Parameters:

sourceRoot - root directory for the module source tree

Throws:

IOException - when source files cannot be written

compileModules

public ModuleSystemExamples.CommandResult compileModules(Path sourceRoot,
 Path moduleOutputDirectory)
                                                  throws IOException,
InterruptedException

Compiles all module source files under a module source root.

Parameters:

sourceRoot - root containing module directories

moduleOutputDirectory - output directory for compiled modules

Returns:

compiler process result

Throws:

IOException - when the compiler cannot be started or source files cannot be listed

InterruptedException - when interrupted while waiting for the compiler

runApplicationModule

public ModuleSystemExamples.CommandResult runApplicationModule(Path moduleOutputDirectory)
                                                        throws IOException,
InterruptedException

Runs the modular application.

Parameters:

moduleOutputDirectory - directory containing compiled modules

Returns:

Java process result

Throws:

IOException - when the child JVM cannot be started

InterruptedException - when interrupted while waiting for the child JVM