fleetd/bridged/src/main/java/dev/ltms/bridged/placement/PlacementPolicies.java

package dev.ltms.bridged.placement;

/**
 * Factory for the built-in placement policies.
 */
public final class PlacementPolicies {

    private PlacementPolicies() {
    }

    /**
     * Resolve a policy name from config. Absent/blank values and {@code "fixed"} return the
     * backward-compatible fixed policy; unknown names throw.
     */
    public static PlacementPolicy fromName(String name) {
        String n = (name == null) ? "" : name.toLowerCase();
        if (n.isBlank() || "fixed".equals(n)) {
            return fixed();
        }
        if ("weighted".equals(n)) {
            return weighted();
        }
        if ("round-robin".equals(n)) {
            return roundRobin();
        }
        throw new IllegalArgumentException("unknown placement policy '" + name
                + "' — must be one of: fixed, round-robin, weighted");
    }

    public static PlacementPolicy fixed() {
        return new FixedPlacementPolicy();
    }

    public static PlacementPolicy weighted() {
        return new WeightedRoundRobinPolicy();
    }

    public static PlacementPolicy roundRobin() {
        return new RoundRobinPlacementPolicy();
    }
}