use of hudson.util.CyclicGraphDetector in project hudson-2.x by hudson.
the class PluginManager method initTasks.
/**
* Called immediately after the construction.
* This is a separate method so that code executed from here will see a valid value in
* {@link Hudson#pluginManager}.
*/
public TaskBuilder initTasks(final InitStrategy initStrategy) {
TaskBuilder builder;
if (!pluginListed) {
builder = new TaskGraphBuilder() {
List<File> archives;
Collection<String> bundledPlugins;
{
Handle loadBundledPlugins = add("Loading bundled plugins", new Executable() {
public void run(Reactor session) throws Exception {
bundledPlugins = loadBundledPlugins();
}
});
Handle listUpPlugins = requires(loadBundledPlugins).add("Listing up plugins", new Executable() {
public void run(Reactor session) throws Exception {
archives = initStrategy.listPluginArchives(PluginManager.this);
}
});
requires(listUpPlugins).attains(PLUGINS_LISTED).add("Preparing plugins", new Executable() {
public void run(Reactor session) throws Exception {
// once we've listed plugins, we can fill in the reactor with plugin-specific initialization tasks
TaskGraphBuilder g = new TaskGraphBuilder();
final Map<String, File> inspectedShortNames = new HashMap<String, File>();
for (final File arc : archives) {
g.followedBy().notFatal().attains(PLUGINS_LISTED).add("Inspecting plugin " + arc, new Executable() {
public void run(Reactor session1) throws Exception {
try {
PluginWrapper p = strategy.createPluginWrapper(arc);
if (isDuplicate(p))
return;
p.isBundled = bundledPlugins.contains(arc.getName());
plugins.add(p);
if (p.isActive())
activePlugins.add(p);
} catch (IOException e) {
failedPlugins.add(new FailedPlugin(arc.getName(), e));
throw e;
}
}
/**
* Inspects duplication. this happens when you run hpi:run on a bundled plugin,
* as well as putting numbered hpi files, like "cobertura-1.0.hpi" and "cobertura-1.1.hpi"
*/
private boolean isDuplicate(PluginWrapper p) {
String shortName = p.getShortName();
if (inspectedShortNames.containsKey(shortName)) {
LOGGER.info("Ignoring " + arc + " because " + inspectedShortNames.get(shortName) + " is already loaded");
return true;
}
inspectedShortNames.put(shortName, arc);
return false;
}
});
}
g.requires(PLUGINS_PREPARED).add("Checking cyclic dependencies", new Executable() {
/**
* Makes sure there's no cycle in dependencies.
*/
public void run(Reactor reactor) throws Exception {
try {
new CyclicGraphDetector<PluginWrapper>() {
@Override
protected List<PluginWrapper> getEdges(PluginWrapper p) {
List<PluginWrapper> next = new ArrayList<PluginWrapper>();
addTo(p.getDependencies(), next);
addTo(p.getOptionalDependencies(), next);
return next;
}
private void addTo(List<Dependency> dependencies, List<PluginWrapper> r) {
for (Dependency d : dependencies) {
PluginWrapper p = getPlugin(d.shortName);
if (p != null)
r.add(p);
}
}
}.run(getPlugins());
} catch (CycleDetectedException e) {
// disable all plugins since classloading from them can lead to StackOverflow
stop();
// let Hudson fail
throw e;
}
Collections.sort(plugins);
}
});
session.addAll(g.discoverTasks(session));
// technically speaking this is still too early, as at this point tasks are merely scheduled, not necessarily executed.
pluginListed = true;
}
});
}
};
} else {
builder = TaskBuilder.EMPTY_BUILDER;
}
// misc. stuff
final InitializerFinder initializerFinder = new InitializerFinder(uberClassLoader);
// lists up initialization tasks about loading plugins.
return // this scans @Initializer in the core once
TaskBuilder.union(// this scans @Initializer in the core once
initializerFinder, builder, new TaskGraphBuilder() {
{
requires(PLUGINS_LISTED).attains(PLUGINS_PREPARED).add("Loading plugins", new Executable() {
/**
* Once the plugins are listed, schedule their initialization.
*/
public void run(Reactor session) throws Exception {
Hudson.getInstance().lookup.set(PluginInstanceStore.class, new PluginInstanceStore());
TaskGraphBuilder g = new TaskGraphBuilder();
// schedule execution of loading plugins
for (final PluginWrapper p : activePlugins.toArray(new PluginWrapper[activePlugins.size()])) {
g.followedBy().notFatal().attains(PLUGINS_PREPARED).add("Loading plugin " + p.getShortName(), new Executable() {
public void run(Reactor session) throws Exception {
try {
p.resolvePluginDependencies();
strategy.load(p);
} catch (IOException e) {
failedPlugins.add(new FailedPlugin(p.getShortName(), e));
activePlugins.remove(p);
plugins.remove(p);
throw e;
}
}
});
}
// schedule execution of initializing plugins
for (final PluginWrapper p : activePlugins.toArray(new PluginWrapper[activePlugins.size()])) {
g.followedBy().notFatal().attains(PLUGINS_STARTED).add("Initializing plugin " + p.getShortName(), new Executable() {
public void run(Reactor session) throws Exception {
try {
p.getPlugin().postInitialize();
} catch (Exception e) {
failedPlugins.add(new FailedPlugin(p.getShortName(), e));
activePlugins.remove(p);
plugins.remove(p);
throw e;
}
}
});
}
g.followedBy().attains(PLUGINS_STARTED).add("Discovering plugin initialization tasks", new Executable() {
public void run(Reactor reactor) throws Exception {
// rescan to find plugin-contributed @Initializer
reactor.addAll(initializerFinder.discoverTasks(reactor));
}
});
// register them all
session.addAll(g.discoverTasks(session));
}
});
}
});
}
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