}

    public List<Integer> getAllocated() {
        return allocated;
    }

    public final Integer getOrAllocate(String id) {
        return allocatedPortsId.computeIfAbsent(id, (key) -> allocate());
    }

    public final Integer getAllocated(String id) {
        return allocatedPortsId.get(id);
    }

    public int getCurrent() {
        return current;
    }

        }

        private LongAdder getCounter(BuilderProblem.Severity severity) {
            return counters.computeIfAbsent(severity, k -> new LongAdder());
        }

        private List<P> getProblems(BuilderProblem.Severity severity) {
            return problems.computeIfAbsent(severity, k -> new CopyOnWriteArrayList<>());
        }

                allHandlers.clear();
            }
        }
    }

    @Override
    public ArtifactHandler getArtifactHandler(String id) {
        return allHandlers.computeIfAbsent(id, k -> {
            Type type = typeRegistry.require(id);
            return new DefaultArtifactHandler(
                    id,
                    type.getExtension(),
                    type.getClassifier(),

        lifecycle.allPhases().forEach(phase -> phase.plugins()
                .forEach(plugin -> plugin.getExecutions().forEach(exec -> exec.getGoals()
                        .forEach(goal -> goals.computeIfAbsent(phase.name(), n -> new ArrayList<>())
                                .add(plugin.getGroupId() + ":" + plugin.getArtifactId() + ":" + plugin.getVersion()
                                        + ":" + goal)))));

            }, depsTask);

            if (distribution.getPlatform() == Platform.WINDOWS) {
                windowsTestTasks.add(destructiveTask);
            } else {
                linuxTestTasks.computeIfAbsent(distribution.getType(), k -> new ArrayList<>()).add(destructiveTask);
            }
            destructiveDistroTest.configure(t -> t.dependsOn(destructiveTask));

        return Optional.of(require(id));
    }

    @Override
    @Nonnull
    public Type require(String id) {
        requireNonNull(id, "id cannot be null");
        return usedTypes.computeIfAbsent(id, i -> {
            Type type = lookup.lookupList(TypeProvider.class).stream()
                    .flatMap(p -> p.provides().stream())
                    .filter(t -> Objects.equals(id, t.id()))

     * Parses the phase identifier.
     *
     * @param phase the phase identifier.
     * @return the {@link PhaseId}.
     */
    public static synchronized PhaseId of(String phase) {
        return INSTANCES.computeIfAbsent(phase, PhaseId::new);
    }

    /**
     * Constructor.
     *
     * @param phase the phase identifier string.
     */
    private PhaseId(String phase) {
        int phaseStart;

        ConcurrentMap<String, ConcurrentMap<String, Object>> pluginContextsByKey =
                pluginContextsByProjectAndPluginKey.computeIfAbsent(projectKey, k -> new ConcurrentHashMap<>());

        String pluginKey = plugin.getPluginLookupKey();

        return pluginContextsByKey.computeIfAbsent(pluginKey, k -> new ConcurrentHashMap<>());
    }

    public ProjectDependencyGraph getProjectDependencyGraph() {

        // and allow multiple instances per JVM, this may become a pool? derive key based in invokerRequest?
        MavenContext result = residentContext.computeIfAbsent(
                "resident",
                k -> new MavenContext(invokerRequest, false, (MavenOptions)
                        invokerRequest.options().orElse(null)));
        return copyIfDifferent(result, invokerRequest);

        
        // Mark channel as failed
        failedChannel.setState(ChannelState.FAILED);
        
        // Get or create failover state
        FailoverState state = failoverStates.computeIfAbsent(
            failedChannel.getChannelId(), 
            FailoverState::new
        );
        
        // Redistribute pending operations
        redistributePendingOperations(failedChannel);