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mediator.F90
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!==============================================================================
! Earth System Modeling Framework
! Copyright (c) 2002-2025, University Corporation for Atmospheric Research,
! Massachusetts Institute of Technology, Geophysical Fluid Dynamics
! Laboratory, University of Michigan, National Centers for Environmental
! Prediction, Los Alamos National Laboratory, Argonne National Laboratory,
! NASA Goddard Space Flight Center.
! Licensed under the University of Illinois-NCSA License.
!==============================================================================
module Mediator
use ESMF
use NUOPC
implicit none
private
type(ESMF_Container) :: fieldListContainer
type FieldList
type(ESMF_Field), pointer :: fieldList(:)
end type
type FieldListWrap
type(FieldList), pointer :: wrap
end type
type(ESMF_Container) :: gridContainer
type GridWrap
type(ESMF_Grid), pointer :: wrap
end type
type(ESMF_Container) :: meshContainer
type MeshWrap
type(ESMF_Mesh), pointer :: wrap
end type
public SetServices
!-----------------------------------------------------------------------------
contains
!-----------------------------------------------------------------------------
subroutine SetServices(mediator, rc)
type(ESMF_GridComp) :: mediator
integer, intent(out) :: rc
rc = ESMF_SUCCESS
call ESMF_GridCompSetEntryPoint(mediator, ESMF_METHOD_INITIALIZE, &
phase=1, userRoutine=Init1, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
end subroutine
!-----------------------------------------------------------------------------
subroutine Init1(mediator, importState, exportState, clock, rc)
type(ESMF_GridComp) :: mediator
type(ESMF_State) :: importState, exportState
type(ESMF_Clock) :: clock
integer, intent(out) :: rc
type(ESMF_Config) :: config
rc = ESMF_SUCCESS
call ESMF_GridCompGet(mediator, config=config, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! set up the auxiliary lookup containers
fieldListContainer = ESMF_ContainerCreate(rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
gridContainer = ESMF_ContainerCreate(rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
meshContainer = ESMF_ContainerCreate(rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! ingest the Config file, and populate the importState
call AddStateMembers(importState, config, label="stateMembers:", rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
end subroutine
!-----------------------------------------------------------------------------
recursive subroutine AddStateMembers(state, config, label, rc)
type(ESMF_State) :: state
type(ESMF_Config) :: config
character(*) :: label
integer, intent(out) :: rc
integer :: count, i
character(40), allocatable :: stateMembers(:)
character(ESMF_MAXSTR), pointer :: tokenList(:)
rc = ESMF_SUCCESS
! read state members
count = ESMF_ConfigGetLen(config, label=trim(label), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
allocate(stateMembers(count))
call ESMF_ConfigGetAttribute(config, label=trim(label), &
valueList=stateMembers, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! loop over state members, tokenize, and populate importState
do i=1, count
nullify(tokenList)
call NUOPC_ChopString(stateMembers(i), chopChar="-", &
chopStringList=tokenList, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
if (size(tokenList)/=2) then
call ESMF_LogSetError(ESMF_RC_ARG_BAD, &
msg="Format problem in stateMember", &
line=__LINE__, file=__FILE__, rcToReturn=rc)
return ! bail out
endif
if (trim(tokenList(1))=="fields") then
call AddFields(state, config, stateMembers(i), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
else if (trim(tokenList(1))=="nest") then
call AddNest(state, config, stateMembers(i), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
else
call ESMF_LogSetError(ESMF_RC_ARG_BAD, &
msg="stateMember is neither 'fields' nor 'nest'", &
line=__LINE__, file=__FILE__, rcToReturn=rc)
return ! bail out
endif
if (associated(tokenList)) deallocate(tokenList)
enddo
end subroutine
!-----------------------------------------------------------------------------
recursive subroutine AddNest(state, config, label, rc)
type(ESMF_State), intent(inout) :: state
type(ESMF_Config),intent(in) :: config
character(*), intent(in) :: label
integer, intent(out) :: rc
type(ESMF_State) :: nestedState
rc = ESMF_SUCCESS
! create the nestedState
nestedState = ESMF_StateCreate(name=trim(label), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! add the nestedState to the state
call ESMF_StateAdd(state, (/nestedState/), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
call ESMF_LogWrite("Add nest '"//trim(label)//"' to state.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
! recursively populate the state
call AddStateMembers(nestedState, config, label=trim(label)//":", rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
end subroutine
!-----------------------------------------------------------------------------
recursive subroutine AddFields(state, config, label, rc)
type(ESMF_State), intent(inout) :: state
type(ESMF_Config),intent(in) :: config
character(*), intent(in) :: label
integer, intent(out) :: rc
type(ESMF_Config) :: configFields
integer :: count, i
character(40) :: tkS, geomS, fieldName
character(ESMF_MAXSTR), pointer :: tokenList(:)
type(ESMF_Grid) :: grid
type(ESMF_Mesh) :: mesh
type(ESMF_TypeKind_Flag) :: tk
type(ESMF_Logical) :: isPres
type(FieldListWrap) :: flW
rc = ESMF_SUCCESS
! check if the fieldList by this label already exists
call c_ESMC_ContainerGetIsPresent(fieldListContainer, trim(label), &
isPres, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
if (isPres==ESMF_TRUE) then
! query the fieldList from the container, and add it to the state
call ESMF_LogWrite("Query fieldList '"//trim(label)//"' from lookup.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
call ESMF_ContainerGetUDT(fieldListContainer, trim(label), flW, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
else
! must create a new fieldList and add to the state
call ESMF_LogWrite("Create fieldList '"//trim(label)//"' from scratch.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
allocate(flW%wrap)
configFields = ESMF_ConfigCreate(config, openlabel="<"//trim(label)//":", &
closelabel=":"//trim(label)//">", rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
call ESMF_ConfigGetAttribute(configFields, label="count:", &
value=count, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
call ESMF_ConfigGetAttribute(configFields, label="typekind:", &
value=tkS, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
call ESMF_ConfigGetAttribute(configFields, label="geom:", &
value=geomS, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
if (trim(tkS)=="I4") then
tk = ESMF_TYPEKIND_I4
else if (trim(tkS)=="I8") then
tk = ESMF_TYPEKIND_I8
else if (trim(tkS)=="R4") then
tk = ESMF_TYPEKIND_R4
else if (trim(tkS)=="R8") then
tk = ESMF_TYPEKIND_R8
else
call ESMF_LogSetError(ESMF_RC_ARG_BAD, &
msg="Specified typekind not supported", &
line=__LINE__, file=__FILE__, rcToReturn=rc)
return ! bail out
endif
nullify(tokenList)
call NUOPC_ChopString(trim(geomS), chopChar="-", &
chopStringList=tokenList, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
if (size(tokenList)/=2) then
call ESMF_LogSetError(ESMF_RC_ARG_BAD, &
msg="Format problem in geom string", &
line=__LINE__, file=__FILE__, rcToReturn=rc)
return ! bail out
endif
if (trim(tokenList(1))=="grid") then
grid = CreateGrid(trim(geomS), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
allocate(flW%wrap%fieldList(count))
do i=1, count
write(fieldName,"(A,'-',I4.4)") trim(label),i
flW%wrap%fieldList(i) = ESMF_FieldCreate(grid, typekind=tk, &
name=trim(fieldName), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
enddo
else if (trim(tokenList(1))=="mesh") then
mesh = CreateMesh(trim(geomS), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
allocate(flW%wrap%fieldList(count))
do i=1, count
write(fieldName,"(A,'-',I4.4)") trim(label),i
flW%wrap%fieldList(i) = ESMF_FieldCreate(mesh, typekind=tk, &
name=trim(fieldName), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
enddo
else
call ESMF_LogSetError(ESMF_RC_ARG_BAD, &
msg="geom string is neither 'grid' nor 'mesh'", &
line=__LINE__, file=__FILE__, rcToReturn=rc)
return ! bail out
endif
! add the fieldList to the fieldList container for later lookup
call ESMF_ContainerAddUDT(fieldListContainer, trim(label), flW, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! clean-up
if (associated(tokenList)) deallocate(tokenList)
endif
! add the fieldList to the state
call ESMF_StateAdd(state, flW%wrap%fieldList, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
end subroutine
!-----------------------------------------------------------------------------
function CreateGrid(gridName, rc)
type(ESMF_Grid) :: CreateGrid
character(*), intent(in) :: gridName
integer, intent(out) :: rc
type(ESMF_Logical) :: isPres
type(GridWrap) :: gW
rc = ESMF_SUCCESS
! check if the grid by this name already exists
call c_ESMC_ContainerGetIsPresent(gridContainer, trim(gridName), &
isPres, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
if (isPres==ESMF_TRUE) then
! query the grid from the container
call ESMF_LogWrite("Query grid '"//trim(gridName)//"' from lookup.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
call ESMF_ContainerGetUDT(gridContainer, trim(gridName), gW, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
else
! must create a new fieldList and add to the state
call ESMF_LogWrite("Create grid '"//trim(gridName)//"' from scratch.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
allocate(gW%wrap)
gW%wrap = ESMF_GridCreateNoPeriDimUfrm(maxIndex=(/100, 100/), &
minCornerCoord=(/0._ESMF_KIND_R8, -90._ESMF_KIND_R8/), &
maxCornerCoord=(/360._ESMF_KIND_R8, 90._ESMF_KIND_R8/), &
staggerLocList=(/ESMF_STAGGERLOC_CENTER, ESMF_STAGGERLOC_CORNER/), &
name=gridName, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! add the grid to the grid container for later lookup
call ESMF_ContainerAddUDT(gridContainer, trim(gridName), gW, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
endif
! return the grid
CreateGrid = gW%wrap
end function
!-----------------------------------------------------------------------------
function CreateMesh(meshName, rc)
type(ESMF_Mesh) :: CreateMesh
character(*), intent(in) :: meshName
integer, intent(out) :: rc
type(ESMF_Logical) :: isPres
type(MeshWrap) :: mW
rc = ESMF_SUCCESS
! check if the mesh by this name already exists
call c_ESMC_ContainerGetIsPresent(meshContainer, trim(meshName), &
isPres, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
if (isPres==ESMF_TRUE) then
! query the mesh from the container
call ESMF_LogWrite("Query mesh '"//trim(meshName)//"' from lookup.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
call ESMF_ContainerGetUDT(meshContainer, trim(meshName), mW, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
else
! must create a new fieldList and add to the state
call ESMF_LogWrite("Create mesh '"//trim(meshName)//"' from scratch.", &
ESMF_LOGMSG_INFO, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
call ESMF_Finalize(endflag=ESMF_END_ABORT)
allocate(mW%wrap)
mW%wrap = ESMF_MeshCreateCubedSphere(tileSize=50, &
nx=10, ny=10, rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
! add the mesh to the mesh container for later lookup
call ESMF_ContainerAddUDT(meshContainer, trim(meshName), mW, rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, &
line=__LINE__, &
file=__FILE__)) &
return ! bail out
endif
! return the mesh
CreateMesh = mW%wrap
end function
!-----------------------------------------------------------------------------
end module