import com.subgraph.orchid.circuits.CircuitManagerImpl.CircuitFilter; //导入依赖的package包/类
private void expireOldCircuits() {
	final Set<Circuit> circuits = circuitManager.getCircuitsByFilter(new CircuitFilter() {

		public boolean filter(Circuit circuit) {
			return !circuit.isMarkedForClose() && circuit.getSecondsDirty() > MAX_CIRCUIT_DIRTINESS;
		}
	});
	for(Circuit c: circuits) {
		logger.fine("Closing idle dirty circuit: "+ c);
		((CircuitImpl)c).markForClose();
	}
}
 

import com.subgraph.orchid.circuits.CircuitManagerImpl.CircuitFilter; //导入依赖的package包/类
private int countCircuitsSupportingTarget(final ExitTarget target, final boolean needClean) {
	final CircuitFilter filter = new CircuitFilter() {
		public boolean filter(Circuit circuit) {
			if(!(circuit instanceof ExitCircuit)) {
				return false;
			}
			final ExitCircuit ec = (ExitCircuit) circuit;
			final boolean pendingOrConnected = circuit.isPending() || circuit.isConnected();
			final boolean isCleanIfNeeded = !(needClean && !circuit.isClean());
			return pendingOrConnected && isCleanIfNeeded && ec.canHandleExitTo(target);
		}
	};
	return circuitManager.getCircuitsByFilter(filter).size();
}