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Draft for [connect] allow registration of FrameworkUtilHelper directly #90

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Draft for [connect] allow registration of FrameworkUtilHelper directly #90

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7b737e4
Draft for [connect] allow registration of FrameworkUtilHelper directly
laeubi Jul 27, 2022
f2f34f6
Use a more less intrusive approach...
laeubi Jul 27, 2022
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1 change: 1 addition & 0 deletions bundles/org.eclipse.osgi/META-INF/services/org.osgi.framework.connect.FrameworkUtilHelper
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
org.eclipse.osgi.internal.framework.ConnectFrameworkUtilHelper
26 changes: 26 additions & 0 deletions ...se.osgi/container/src/org/eclipse/osgi/internal/framework/ConnectFrameworkUtilHelper.java
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@@ -0,0 +1,26 @@
package org.eclipse.osgi.internal.framework;

import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.osgi.framework.Bundle;
import org.osgi.framework.connect.FrameworkUtilHelper;

public class ConnectFrameworkUtilHelper implements FrameworkUtilHelper {
static final Set<FrameworkUtilHelper> connectHelpers = ConcurrentHashMap.newKeySet();

@Override
public Optional<Bundle> getBundle(Class<?> classFromBundle) {
return connectHelpers.stream().filter(Objects::nonNull)
.flatMap(helper -> helper.getBundle(classFromBundle).stream()).findFirst();
}

public static void add(FrameworkUtilHelper moduleConnector) {
connectHelpers.add(moduleConnector);
}

public static void remove(FrameworkUtilHelper moduleConnector) {
connectHelpers.remove(moduleConnector);
}
}
22 changes: 22 additions & 0 deletions .../org.eclipse.osgi/container/src/org/eclipse/osgi/internal/framework/EquinoxContainer.java
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Expand Up @@ -25,6 +25,7 @@
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
Expand Down Expand Up @@ -57,6 +58,7 @@
import org.osgi.framework.FrameworkUtil;
import org.osgi.framework.connect.ConnectContent;
import org.osgi.framework.connect.ConnectModule;
import org.osgi.framework.connect.FrameworkUtilHelper;
import org.osgi.framework.connect.ModuleConnector;
import org.osgi.util.tracker.ServiceTracker;

Expand Down Expand Up @@ -154,6 +156,9 @@ private static void initConnectFramework(ModuleConnector moduleConnector, Equino
final File fwkStore = new File(configUrl.getPath());
@SuppressWarnings({"rawtypes", "unchecked"})
Map<String, String> config = (Map) equinoxConfig.getInitialConfig();
if (moduleConnector instanceof FrameworkUtilHelper) {
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I don't think this is necessary if you are adding during init.

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I was not really sure waht should be the very first time it is registered, e.g after creation of the factory? or after/before init? Or maybe when start is called?

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I think we should start with it only being registered in init

ConnectFrameworkUtilHelper.add((FrameworkUtilHelper) moduleConnector);
}
moduleConnector.initialize(fwkStore, Collections.unmodifiableMap(config));
}

Expand All @@ -174,6 +179,13 @@ public EquinoxLogServices getLogServices() {
}

public Bundle getBundle(Class<?> clazz) {
if (connectModules.moduleConnector instanceof FrameworkUtilHelper) {
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@tjwatson tjwatson Jul 28, 2022 •
edited
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We should not need to do this if the helper is added to the ConnectFrameworkUtilHelper and plugged into FrameworkUtil. Will this not lead to it being called twice?

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I think a Connect user will either register it as an SPI or through the creation directly.
The other idea was that we always give the chance first the one provided by the connect factory because I already found a little problem when running multiple frameworks that one has to find out what is the right one for that framework.

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My point is that I don't know why you call the ModuleConnector as a helper directly here when it should have been automatically added to the ConnectFrameworkUtilHelper and called below when we invoke FrameworkUtil.getBundle.

As for giving this helper a chance first. I don't think we should do that. Any helper has to be able to figure this stuff about the framework it is from itself because any code not using the deprecated PackageAdmin will instead directly call FrameworkUtil.getBundle. But calling the same helper twice doesn't seem correct.

FrameworkUtilHelper helper = (FrameworkUtilHelper) connectModules.moduleConnector;
Optional<Bundle> bundle = helper.getBundle(clazz);
if (bundle.isPresent()) {
return bundle.get();
}
}
Bundle b = FrameworkUtil.getBundle(clazz);
if (b != null) {
return b;
Expand Down Expand Up @@ -214,6 +226,10 @@ public boolean isProcessClassRecursionSupportedByAll() {
}

void init() {
if (connectModules.moduleConnector instanceof FrameworkUtilHelper) {
FrameworkUtilHelper helper = (FrameworkUtilHelper) connectModules.moduleConnector;
ConnectFrameworkUtilHelper.add(helper);
}
eventPublisher.init();
synchronized (this.monitor) {
serviceRegistry = new ServiceRegistry(this);
Expand All @@ -240,6 +256,12 @@ void close() {
currentStorage.close();
// Must be done last since it will result in termination of the
// framework active thread.
if (connectModules.moduleConnector instanceof FrameworkUtilHelper) {
FrameworkUtilHelper helper = (FrameworkUtilHelper) connectModules.moduleConnector;
currentExecutor.execute(() -> {
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Why is this done async here?

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This is so this happens after all pending task of the executor as a very last action ... because we don't wait here to the shutdown of the executor.... but maybe that is not necessary...?

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I would just do it synchronously. If we run into an issue with that then we can understand if something else is needed.

ConnectFrameworkUtilHelper.remove(helper);
});
}
currentExecutor.shutdown();
}

Expand Down