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package mightypork.gamecore.core.init; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import mightypork.utils.Reflect; |
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import mightypork.utils.logging.Log; |
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/** |
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* initialization sequence that takes care of task dependencies and ordering. |
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* |
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* @author Ondřej Hruška (MightyPork) |
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*/ |
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public class InitSequence { |
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private final Map<String, InitTask> taskMap = new HashMap<>(); |
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/** |
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* Add a task. If a task with the name already exists, replace it. |
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* |
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* @param task task to add |
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*/ |
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public void addTask(InitTask task) |
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{ |
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final String name = task.getName(); |
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// detailed logging
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// if (taskMap.containsKey(name)) {
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// Log.f3("REPL init " + Str.pad("\"" + name + "\"", 20) + " <" + Str.val(task) + ">");
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// } else {
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// Log.f3("ADD init " + Str.pad("\"" + name + "\"", 20) + " <" + Str.val(task) + ">");
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// }
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taskMap.put(name, task); |
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} |
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/** |
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* Get task sequence in proper order. |
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* |
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* @return initialization sequence |
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*/ |
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public List<InitTask> getSequence() |
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{ |
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final List<InitTask> remainingTasks = new ArrayList<>(taskMap.values()); |
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final List<InitTask> orderedTasks = new ArrayList<>(); |
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final Set<String> loadedTaskNames = new HashSet<>(); |
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// resolve task order
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InitTask taskToAdd = null; |
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do { |
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taskToAdd = null; |
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for (final InitTask task : remainingTasks) { |
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String[] deps = task.getDependencies(); |
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if (deps == null) deps = new String[] {}; |
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int missingDeps = deps.length; |
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for (final String d : deps) { |
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if (loadedTaskNames.contains(d)) missingDeps--; |
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} |
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if (missingDeps == 0) { |
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if (taskToAdd == null || taskToAdd.getPriority() < task.getPriority()) { |
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taskToAdd = task; |
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} |
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} |
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} |
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if (taskToAdd != null) { |
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orderedTasks.add(taskToAdd); |
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loadedTaskNames.add(taskToAdd.getName()); |
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remainingTasks.remove(taskToAdd); |
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} |
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} while (taskToAdd != null); |
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checkLeftovers(loadedTaskNames, remainingTasks); |
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return orderedTasks; |
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} |
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public List<InitTask> getSequenceOldImpl() |
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{ |
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final List<InitTask> remainingTasks = new ArrayList<>(taskMap.values()); |
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final List<InitTask> orderedTasks = new ArrayList<>(); |
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final Set<String> loadedTaskNames = new HashSet<>(); |
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// resolve task order
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int addedThisIteration = 0; |
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do { |
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addedThisIteration = 0; |
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for (final Iterator<InitTask> i = remainingTasks.iterator(); i.hasNext();) { |
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final InitTask task = i.next(); |
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String[] deps = task.getDependencies(); |
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if (deps == null) deps = new String[] {}; |
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int missingDeps = deps.length; |
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for (final String d : deps) { |
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if (loadedTaskNames.contains(d)) missingDeps--; |
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} |
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if (missingDeps == 0) { |
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orderedTasks.add(task); |
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loadedTaskNames.add(task.getName()); |
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i.remove(); |
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addedThisIteration++; |
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} |
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} |
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} while (addedThisIteration > 0); |
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checkLeftovers(loadedTaskNames, remainingTasks); |
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return orderedTasks; |
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} |
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private void checkLeftovers(Collection<String> loadedTaskNames, Collection<InitTask> remainingTasks) |
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{ |
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// check if any tasks are left out
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if (remainingTasks.size() > 0) { |
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// build error message for each bad task
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int badInitializers = 0; |
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for (final InitTask task : remainingTasks) { |
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if (Reflect.hasAnnotation(task.getClass(), OptionalInitTask.class)) { |
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continue; |
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} |
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badInitializers++; |
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String notSatisfied = ""; |
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for (final String d : task.getDependencies()) { |
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if (!loadedTaskNames.contains(d)) { |
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if (!notSatisfied.isEmpty()) { |
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notSatisfied += ", "; |
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} |
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notSatisfied += d; |
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} |
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} |
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Log.w("InitTask \"" + task.getName() + "\" - missing dependencies: " + notSatisfied); |
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} |
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if (badInitializers > 0) throw new RuntimeException("Some InitTask dependencies could not be satisfied."); |
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} |
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} |
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} |
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@ -0,0 +1,41 @@ |
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package mightypork.gamecore.core.init; |
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import mightypork.gamecore.core.App; |
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/** |
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* Initialize backend. The main point of postponing this is to make sure the |
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* init is logged properly. |
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* |
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* @author Ondřej Hruška (MightyPork) |
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*/ |
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public class InitTaskBackend extends InitTask { |
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@Override |
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public void run() |
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{ |
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App.instance().getBackend().initialize(); |
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} |
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@Override |
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public String getName() |
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{ |
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return "backend"; |
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} |
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@Override |
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public String[] getDependencies() |
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{ |
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return new String[] { "log" }; |
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} |
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@Override |
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public int getPriority() |
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{ |
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return PRIO_EARLY; |
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} |
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} |
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@ -1,42 +0,0 @@ |
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package mightypork.gamecore.core.init; |
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import mightypork.gamecore.graphics.Renderable; |
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/** |
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* Task to init renderable screens (part of the main loop).<br> |
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* Resources must already be ready. |
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* |
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* @author Ondřej Hruška (MightyPork) |
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*/ |
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public abstract class InitTaskScreens extends InitTask { |
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@Override |
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public void run() |
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{ |
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app.setMainRenderable(getMainRenderableImpl()); |
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} |
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/** |
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* Create a loader impl |
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* |
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* @return loader |
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*/ |
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protected abstract Renderable getMainRenderableImpl(); |
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@Override |
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public String getName() |
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{ |
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return "renderables"; |
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} |
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@Override |
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public String[] getDependencies() |
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{ |
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return new String[] { "resources", "main_loop" }; |
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} |
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} |
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@ -0,0 +1,51 @@ |
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package mightypork.gamecore.core.init; |
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import mightypork.gamecore.graphics.Renderable; |
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import mightypork.gamecore.resources.Res; |
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/** |
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* Task to init main renderable (UI).<br> |
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* Resources are already registered in {@link Res}. |
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* |
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* @author Ondřej Hruška (MightyPork) |
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*/ |
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public abstract class InitTaskUI extends InitTask { |
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@Override |
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public void run() |
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{ |
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app.setMainRenderable(createMainRenderable()); |
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} |
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/** |
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* Create a loader impl |
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* |
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* @return loader |
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*/ |
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protected abstract Renderable createMainRenderable(); |
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@Override |
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public String getName() |
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{ |
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return "ui"; |
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} |
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@Override |
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public String[] getDependencies() |
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{ |
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// main loop queues layout change events, would lose them otherwise
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return new String[] { "resources", "main_loop" }; |
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} |
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@Override |
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public int getPriority() |
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{ |
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return PRIO_LAST; |
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} |
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} |
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