Examples with Placeable com.ibm.streamsx.topology.context.Placeable used on opensource projects

Example 1 with Placeable

use of com.ibm.streamsx.topology.context.Placeable in project streamsx.topology by IBMStreams.

the class PlacementInfo method colocate.

/**
 * Fuse a number of placeables.
 * If fusing occurs then the fusing id
 * is set as explicitColocate in the placement JSON object in
 * the operator's config.
 * @throws IllegalArgumentException if Placeables are from different
 *          topologies or if Placeable.isPlaceable()==false.
 */
static boolean colocate(Placeable<?> first, Placeable<?>... toFuse) {
    Set<Placeable<?>> elements = new HashSet<>();
    elements.add(first);
    elements.addAll(Arrays.asList(toFuse));
    // check high level constraints
    for (Placeable<?> element : elements) {
        if (!element.isPlaceable())
            throw new IllegalArgumentException(Messages.getString("CORE_ILLEGAL_OPERATION_PLACEABLE"));
        if (!first.topology().equals(element.topology()))
            throw new IllegalArgumentException(Messages.getString("CORE_DIFFERENT_TOPOLOGIES", first.topology().getName(), element.topology().getName()));
    }
    if (elements.size() < 2)
        return false;
    disallowColocateInLowLatency(elements);
    disallowColocateIsolatedOpWithParent(first, toFuse);
    final JsonPrimitive colocateTag = new JsonPrimitive("__spl_colocate$" + nextFuseId.getAndIncrement());
    Set<String> fusedResourceTags = new HashSet<>();
    for (Placeable<?> element : elements) {
        JsonObject placement = placement(element);
        JsonArray colocateIds = arrayCreate(placement, PLACEMENT_COLOCATE_TAGS);
        colocateIds.add(colocateTag);
        // Determine the union of all resource tags for the colocated operators
        if (placement.has(PLACEMENT_RESOURCE_TAGS)) {
            addToSet(fusedResourceTags, array(placement, PLACEMENT_RESOURCE_TAGS));
        }
    }
    JsonArray fusedResourceTagsJson = setToArray(fusedResourceTags);
    // And finally update all the JSON info
    for (Placeable<?> element : elements) {
        JsonObject placement = placement(element);
        placement.add(PLACEMENT_RESOURCE_TAGS, fusedResourceTagsJson);
    }
    return true;
}