user_initP3 Subroutine

  subroutine user_initP3(comp, importState, exportState, clock, rc)
    type(ESMF_CplComp)    :: comp
    type(ESMF_State)      :: importState, exportState
    type(ESMF_Clock)      :: clock
    integer, intent(out)  :: rc

    ! Local variables
    type(ESMF_Field)        :: srcField, dstField, finalField
    type(ESMF_RouteHandle)  :: rh

    ! Initialize return code
    rc = ESMF_SUCCESS

    print *, "User Coupler Init phase=3 starting"

    ! Re-reconcile import and export states, just in case something changed
    call ESMF_StateReconcile(importState, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_StateReconcile(exportState, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out

    ! Access source, final, and destination Fields
    call ESMF_StateGet(importState, "srcField", srcField, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_StateGet(importState, "finalField", finalField, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_StateGet(exportState, "dstField", dstField, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    
    ! Precompute the Redist operation, give it a name and keep it in importState
    call ESMF_FieldRedistStore(srcField, dstField, routehandle=rh, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_RouteHandleSet(rh, name="Redist", rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_StateAdd(importState, (/rh/), rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
        
    ! Precompute the Regrid operation, give it a name and keep it in importState
    call ESMF_FieldRegridStore(dstField, finalField, routehandle=rh, rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_RouteHandleSet(rh, name="Regrid", rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
    call ESMF_StateAdd(importState, (/rh/), rc=rc)
    if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
      line=__LINE__, &
      file=__FILE__)) return ! bail out
        
    print *, "User Coupler Init phase=3 returning"
   
  end subroutine user_initP3