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Fixed and improved error handling when loading addons

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Fixes #440

* Added Addon#getState()
* Added LOADED in Addon.State
* Added AddonsManager#getLoadedAddons() and AddonsManager#getEnabledAddons()
* Improved the loading addons "workflow"
This commit is contained in:
Florian CUNY 2019-01-04 11:33:35 +01:00
parent 37f509ea56
commit c78efb8736
2 changed files with 131 additions and 65 deletions
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15
src/main/java/world/bentobox/bentobox/api/addons/Addon.java
View File

@ -74,6 +74,12 @@ public abstract class Addon {
* @author Poslovitch
*/
public enum State {
/**
* The addon has been correctly loaded.
* @since 1.1
*/
LOADED,
/**
* The addon has been correctly enabled and is now fully working.
*/
@ -151,6 +157,15 @@ public abstract class Addon {
return state == State.ENABLED;
}
/**
* Gets the current {@link State} of this Addon.
* @return the current State of this Addon.
* @since 1.1
*/
public State getState() {
return state;
}
/**
* Load YAML config file
*

181
src/main/java/world/bentobox/bentobox/managers/AddonsManager.java
View File

@ -55,51 +55,130 @@ public class AddonsManager {
return;
}
Arrays.stream(Objects.requireNonNull(f.listFiles())).filter(x -> !x.isDirectory() && x.getName().endsWith(".jar")).forEach(this::loadAddon);
plugin.log("Loaded " + addons.size() + " addons.");
plugin.log("Loaded " + getLoadedAddons().size() + " addons.");
if (!addons.isEmpty()) {
if (!getLoadedAddons().isEmpty()) {
sortAddons();
}
}
private void loadAddon(File f) {
Addon addon;
AddonClassLoader addonClassLoader;
try (JarFile jar = new JarFile(f)) {
// try loading the addon
// Get description in the addon.yml file
YamlConfiguration data = addonDescription(jar);
// Load the addon
addonClassLoader = new AddonClassLoader(this, data, f, this.getClass().getClassLoader());
// Get the addon itself
addon = addonClassLoader.getAddon();
} catch (Exception e) {
// We couldn't load the addon, aborting.
plugin.logError(e.getMessage());
return;
}
// Initialize some settings
addon.setDataFolder(new File(f.getParent(), addon.getDescription().getName()));
addon.setFile(f);
// Locales
plugin.getLocalesManager().copyLocalesFromAddonJar(addon);
plugin.getLocalesManager().loadLocalesFromFile(addon.getDescription().getName());
// Fire the load event
Bukkit.getPluginManager().callEvent(new AddonEvent().builder().addon(addon).reason(AddonEvent.Reason.LOAD).build());
// Add it to the list of addons
addons.add(addon);
// Add to the list of loaders
loaders.put(addon, addonClassLoader);
try {
// Run the onLoad.
addon.onLoad();
// If this is a GameModeAddon create the worlds, register it and load the schems
if (addon instanceof GameModeAddon) {
GameModeAddon gameMode = (GameModeAddon) addon;
// Create the gameWorlds
gameMode.createWorlds();
plugin.getIWM().addGameMode(gameMode);
// Register the schems
plugin.getSchemsManager().loadIslands(gameMode);
}
// Addon successfully loaded
addon.setState(Addon.State.LOADED);
} catch (NoClassDefFoundError | NoSuchMethodError | NoSuchFieldError e) {
// Looks like the addon is incompatible, because it tries to refer to missing classes...
handleAddonIncompatibility(addon);
} catch (Exception e) {
// Unhandled exception. We'll give a bit of debug here.
handleAddonError(addon, e);
}
}
/**
* Enables all the addons
*/
public void enableAddons() {
if (!addons.isEmpty()) {
if (!getLoadedAddons().isEmpty()) {
plugin.log("Enabling addons...");
addons.forEach(addon -> {
getLoadedAddons().forEach(addon -> {
try {
addon.onEnable();
Bukkit.getPluginManager().callEvent(new AddonEvent().builder().addon(addon).reason(AddonEvent.Reason.ENABLE).build());
addon.setState(Addon.State.ENABLED);
plugin.log("Enabling " + addon.getDescription().getName() + "...");
} catch (NoClassDefFoundError | NoSuchMethodError e) {
// Looks like the addon is outdated, because it tries to refer to missing classes.
// Set the AddonState as "INCOMPATIBLE".
addon.setState(Addon.State.INCOMPATIBLE);
plugin.log("Skipping " + addon.getDescription().getName() + " as it is incompatible with the current version of BentoBox or of server software...");
plugin.log("NOTE: The addon is referring to no longer existing classes.");
plugin.log("NOTE: DO NOT report this as a bug from BentoBox.");
} catch (NoClassDefFoundError | NoSuchMethodError | NoSuchFieldError e) {
// Looks like the addon is incompatible, because it tries to refer to missing classes...
handleAddonIncompatibility(addon);
} catch (Exception e) {
// Unhandled exception. We'll give a bit of debug here.
// Set the AddonState as "ERROR".
addon.setState(Addon.State.ERROR);
plugin.log("Skipping " + addon.getDescription().getName() + " due to an unhandled exception...");
plugin.log("STACKTRACE: " + e.getClass().getSimpleName() + " - " + e.getMessage() + " - " + e.getCause());
handleAddonError(addon, e);
}
});
plugin.log("Addons successfully enabled.");
}
}
/**
* Handles an addon which failed to load due to an incompatibility (missing class, missing method).
* @param addon instance of the Addon.
* @since 1.1
*/
private void handleAddonIncompatibility(Addon addon) {
// Set the AddonState as "INCOMPATIBLE".
addon.setState(Addon.State.INCOMPATIBLE);
plugin.log("Skipping " + addon.getDescription().getName() + " as it is incompatible with the current version of BentoBox or of server software...");
plugin.log("NOTE: The addon is referring to no longer existing classes.");
plugin.log("NOTE: DO NOT report this as a bug from BentoBox.");
}
/**
* Handles an addon which failed to load due to an error.
* @param addon instance of the Addon.
* @param throwable Throwable that was thrown and which lead to the error.
* @since 1.1
*/
private void handleAddonError(Addon addon, Throwable throwable) {
// Set the AddonState as "ERROR".
addon.setState(Addon.State.ERROR);
plugin.log("Skipping " + addon.getDescription().getName() + " due to an unhandled exception...");
plugin.log("STACKTRACE: " + throwable.getClass().getSimpleName() + " - " + throwable.getMessage() + " - " + throwable.getCause());
}
/**
* Reloads all the enabled addons
*/
public void reloadAddons() {
if (!addons.isEmpty()) {
if (!getEnabledAddons().isEmpty()) {
plugin.log("Reloading addons...");
addons.stream().filter(Addon::isEnabled).forEach(addon -> {
getEnabledAddons().stream().filter(Addon::isEnabled).forEach(addon -> {
plugin.log("Reloading " + addon.getDescription().getName() + "...");
addon.onReload();
});
@ -130,60 +209,14 @@ public class AddonsManager {
return data;
}
private void loadAddon(File f) {
Addon addon;
try (JarFile jar = new JarFile(f)) {
// try loading the addon
// Get description in the addon.yml file
YamlConfiguration data = addonDescription(jar);
// Load the addon
AddonClassLoader addonClassLoader = new AddonClassLoader(this, data, f, this.getClass().getClassLoader());
// Get the addon itself
addon = addonClassLoader.getAddon();
// Initialize some settings
addon.setDataFolder(new File(f.getParent(), addon.getDescription().getName()));
addon.setFile(f);
// Locales
plugin.getLocalesManager().copyLocalesFromAddonJar(addon);
plugin.getLocalesManager().loadLocalesFromFile(addon.getDescription().getName());
// Fire the load event
Bukkit.getPluginManager().callEvent(new AddonEvent().builder().addon(addon).reason(AddonEvent.Reason.LOAD).build());
// Add it to the list of addons
addons.add(addon);
// Add to the list of loaders
loaders.put(addon, addonClassLoader);
// Run the onLoad.
addon.onLoad();
// If this is a GameModeAddon create the worlds, register it and load the schems
if (addon instanceof GameModeAddon) {
GameModeAddon gameMode = (GameModeAddon)addon;
// Create the gameWorlds
gameMode.createWorlds();
plugin.getIWM().addGameMode(gameMode);
// Register the schems
plugin.getSchemsManager().loadIslands(gameMode);
}
} catch (Exception e) {
plugin.logError(e.getMessage());
}
}
/**
* Disable all the enabled addons
*/
public void disableAddons() {
if (!addons.isEmpty()) {
if (!getEnabledAddons().isEmpty()) {
plugin.log("Disabling addons...");
// Disable addons
addons.forEach(addon -> {
getEnabledAddons().forEach(addon -> {
if (addon.isEnabled()) {
addon.onDisable();
Bukkit.getPluginManager().callEvent(new AddonEvent().builder().addon(addon).reason(AddonEvent.Reason.DISABLE).build());
@ -206,6 +239,24 @@ public class AddonsManager {
return addons;
}
/**
* Gets the list of Addons that are loaded.
* @return list of loaded Addons.
* @since 1.1
*/
public List<Addon> getLoadedAddons() {
return addons.stream().filter(addon -> addon.getState().equals(Addon.State.LOADED)).collect(Collectors.toList());
}
/**
* Gets the list of Addons that are enabled.
* @return list of enabled Addons.
* @since 1.1
*/
public List<Addon> getEnabledAddons() {
return addons.stream().filter(addon -> addon.getState().equals(Addon.State.ENABLED)).collect(Collectors.toList());
}
public AddonClassLoader getLoader(final Addon addon) {
return loaders.get(addon);
}