Updating the var prefixes and adding creates to shell tasks.

playbooks/roles/oraclejdk/tasks/main.yml

-- name: oraclejdk | check for Oracle Java version {{ java_base }}
-  command: test -d /usr/lib/jvm/{{ java_base }}
+- name: oraclejdk | check for Oracle Java version {{ oraclejdk_base }}
+  command: test -d /usr/lib/jvm/{{ oraclejdk_base }}
   ignore_errors: true
-  register: java_present
+  register: oraclejdk_present
   tags:
     - oraclejdk
     - install
 
 - name: oraclejdk | download Oracle Java
-  shell: executable=/bin/bash curl -b gpw_e24=http%3A%2F%2Fwww.oracle.com -O -L {{ java_url }} chdir=/var/tmp
-  when: java_present|failed
+  shell: executable="/bin/bash curl -b gpw_e24=http%3A%2F%2Fwww.oracle.com -O -L {{ oraclejdk_url }} chdir=/var/tmp" creates="/var/tmp/{ oraclejdk_file }"
+  when: oraclejdk_present|failed
 
 - name: oraclejdk | install Oracle Java
-  shell: exectuable=/bin/bash mkdir -p /usr/lib/jvm && tar -C /usr/lib/jvm -zxvf /var/tmp/{{ java_file }}
+  shell: exectuable=/bin/bash mkdir -p /usr/lib/jvm && tar -C /usr/lib/jvm -zxvf /var/tmp/{{ oraclejdk_file }} creates="/usr/lib/jvm/{{ oraclejdk_base }}"
   sudo: true
-  when: java_present|failed
+  when: oraclejdk_present|failed
   tags:
     - oraclejdk
     - install
 
 - name: oraclejdk | create symlink expected by elasticsearch
-  file: src=/usr/lib/jvm/{{ java_base }} dest={{ java_link }} state=link
-  when: java_present|failed
+  file: src=/usr/lib/jvm/{{ oraclejdk_base }} dest={{ oraclejdk_link }} state=link
+  when: oraclejdk_present|failed
   tags:
     - oraclejdk
     - install
 
 - name: oraclejdk | add JAVA_HOME for Oracle Java
   template: src=java.sh.j2 dest=/etc/profile.d/java.sh owner=root group=root mode=0755
-  when: java_present|failed
+  when: oraclejdk_present|failed
   tags:
   - oraclejdk
   - install
\ No newline at end of file

playbooks/roles/oraclejdk/vars/main.yml

 ---
 
-java_version: "7u25"
+oraclejdk_version: "7u25"
 # what the archive unpacks to
-java_base: "jdk1.7.0_25"
-java_build: "b15"
-java_platform: "linux"
-java_arch: "x64"
-java_file: "jdk-{{ java_version }}-{{ java_platform }}-{{ java_arch }}.tar.gz"
-java_url: "http://download.oracle.com/otn-pub/java/jdk/{{ java_version }}-{{ java_build }}/{{ java_file }}"
-java_link: "/usr/lib/jvm/java-7-oracle"
+oraclejdk_base: "jdk1.7.0_25"
+oraclejdk_build: "b15"
+oraclejdk_platform: "linux"
+oraclejdk_arch: "x64"
+oraclejdk_file: "jdk-{{ oraclejdk_version }}-{{ oraclejdk_platform }}-{{ oraclejdk_arch }}.tar.gz"
+oraclejdk_url: "http://download.oracle.com/otn-pub/java/jdk/{{ oraclejdk_version }}-{{ oraclejdk_build }}/{{ oraclejdk_file }}"
+oraclejdk_link: "/usr/lib/jvm/java-7-oracle"