[Java8] Deprecate cucumber-java8

Author: mpkorstanje

CHANGELOG.md

@@ -24,6 +24,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   - The `progress` formatter is no longer enabled by default on CLI. Use `--plugin progress` to enable.
 
 ### Deprecated
+ * [Java8] Deprecated `cucumber-java8` ([#2174](https://github.com/cucumber/cucumber-jvm/issues/2174) M.P. Korstanje)
+   - For details please see:
+      * https://github.com/cucumber/cucumber-jvm/issues/2174
+      * https://github.com/cucumber/cucumber-jvm/issues/1817
+      * https://github.com/jhalterman/typetools/issues/52
 
 ### Removed
  * [Core] Removed `--strict` and `--no-strict` options ([#1788](https://github.com/cucumber/cucumber-jvm/issues/1788) M.P. Korstanje)

java8/pom.xml

@@ -9,7 +9,7 @@
 
     <artifactId>cucumber-java8</artifactId>
     <packaging>jar</packaging>
-    <name>Cucumber-JVM: Java 8</name>
+    <name>Cucumber-JVM: Java 8 - Deprecated</name>
 
     <properties>
         <project.Automatic-Module-Name>io.cucumber.java8</project.Automatic-Module-Name>

java8/src/main/java/io/cucumber/java8/Java8BackendProviderService.java

@@ -4,13 +4,23 @@
 import io.cucumber.core.backend.BackendProviderService;
 import io.cucumber.core.backend.Container;
 import io.cucumber.core.backend.Lookup;
+import io.cucumber.core.logging.Logger;
+import io.cucumber.core.logging.LoggerFactory;
 
 import java.util.function.Supplier;
 
 public final class Java8BackendProviderService implements BackendProviderService {
 
+    private static final Logger log = LoggerFactory.getLogger(Java8BackendProviderService.class);
+
     @Override
     public Backend create(Lookup lookup, Container container, Supplier<ClassLoader> classLoaderProvider) {
+        log.warn(() -> "" +
+                "cucumber-java8 is deprecated. For details please see:\n" +
+                " * https://github.com/cucumber/cucumber-jvm/issues/2174" +
+                " * https://github.com/cucumber/cucumber-jvm/issues/1817" +
+                " * https://github.com/jhalterman/typetools/issues/52");
+
         return new Java8Backend(lookup, container, classLoaderProvider);
     }