com.google.cloud.tools.jib.plugins.common

Class MainClassResolver

java.lang.Object

com.google.cloud.tools.jib.plugins.common.MainClassResolver

public class MainClassResolver
extends Object

Infers the main class in an application.

Method Summary

Modifier and Type	Method and Description
static String	resolveMainClass(String mainClass, ProjectProperties projectProperties) If mainClass is null, tries to infer main class in this order: 1.

Methods inherited from class java.lang.Object

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

Method Detail

resolveMainClass

public static String resolveMainClass(@Nullable
                                      String mainClass,
                                      ProjectProperties projectProperties)
                               throws MainClassInferenceException,
                                      IOException

If mainClass is null, tries to infer main class in this order:

• 1. Looks in a jar plugin provided by projectProperties (maven-jar-plugin for maven or jar task for gradle).
• 2. Searches for a class defined with a main method.

Warns if main class provided by projectProperties is not valid, or throws an error if no valid main class is found.

Parameters:

mainClass - the explicitly configured main class (null if not configured)

projectProperties - properties containing plugin information and help messages

Returns:

the name of the main class to be used for the container entrypoint

Throws:

MainClassInferenceException - if no valid main class is configured or discovered

IOException - if getting the class files from projectProperties fails