Github user aledsage commented on a diff in the pull request:

    https://github.com/apache/incubator-brooklyn/pull/763#discussion_r36010607
  
    --- Diff: 
software/base/src/main/java/brooklyn/entity/software/MachineLifecycleEffectorTasks.java
 ---
    @@ -155,29 +155,42 @@ public void attachLifecycleEffectors(Entity entity) {
                     .build();
         }
     
    +    /** @see {@link #newStartEffector()} */
    +    public Effector<Void> newSuspendEffector() {
    +        return Effectors.effector(Void.class, "suspend")
    +                .description("Suspend the process/service represented by 
an entity")
    +                .parameter(StopSoftwareParameters.STOP_PROCESS_MODE)
    +                .parameter(StopSoftwareParameters.STOP_MACHINE_MODE)
    +                .impl(newSuspendEffectorTask())
    +                .build();
    +    }
    +
         /**
    -     * Returns the {@link TaskFactory} which supplies the implementation 
for the start effector.
    +     * Returns the {@link EffectorBody} which supplies the implementation 
for the start effector.
          * <p>
          * Calls {@link #start(Collection)} in this class.
          */
         public EffectorBody<Void> newStartEffectorTask() {
    -        return new EffectorBody<Void>() {
    -            @Override
    -            public Void call(ConfigBag parameters) {
    -                Collection<? extends Location> locations  = null;
    +        return new StartEffectorBody();
    --- End diff --
    
    Actually, I see that this is kind-of separate from 
LIFECYCLE_EFFECTOR_TASKS. 
    
    @sjcorbett Why will it not affect previous users, where their code did 
`LIFECYCLE_TASKS.attachLifecycleEffectors(this)` so will have populated the 
effector body?


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