allow default version setting via alternatives

Author: dgoodellrhy

defaults/main.yml

@@ -13,7 +13,7 @@ java_provider: openjdk
 
 # install developer tools if using OpenJDK
 #  this is almost never required for app servers
-java_install_devel: false
+java_install_devel: False
 
 # use 64bit by default
 java_x64: True
@@ -23,3 +23,5 @@ java_x86_url: ""
 java_x86_url_dest: ""
 
 java_use_ansible_yum: True
+
+java_set_default_version: False

tasks/jdk_x64.yml

@@ -44,6 +44,13 @@
     mode: 0644
   tags: ['java']
 
+- name: set default java version
+  community.general.alternatives:
+    name: java
+    path: "/usr/lib/jvm/java-{{ java_default_version }}-{{ java_provider }}.x86_64{{ (java_default_version == '1.8.0') | ternary('/jre/bin/java','/bin/java') }}"
+  when: java_set_default_version
+  tags: ['java']
+
 # so that we always have JAVA_HOME set for legacy components
 # TODO: Remove this in favor of /etc/java/java.conf or role-specific settings
 - name: ensure /etc/profile.d/java.sh exists