karlpauls commented on a change in pull request #6:
URL:
https://github.com/apache/sling-org-apache-sling-resourcemerger/pull/6#discussion_r589797357
##########
File path:
src/main/java/org/apache/sling/resourcemerger/impl/MergedResourcePickerWhiteboard.java
##########
@@ -24,102 +24,96 @@
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.commons.osgi.PropertiesUtil;
import org.apache.sling.resourcemerger.spi.MergedResourcePicker;
import org.apache.sling.resourcemerger.spi.MergedResourcePicker2;
import org.apache.sling.spi.resource.provider.ResourceProvider;
import org.osgi.framework.BundleContext;
-import org.osgi.framework.Constants;
-import org.osgi.framework.InvalidSyntaxException;
-import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
-import org.osgi.util.tracker.ServiceTracker;
-import org.osgi.util.tracker.ServiceTrackerCustomizer;
-
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferencePolicy;
+
+/**
+ * Registers all {@link MergedResourcePicker} and {@link
MergedResourcePicker2} services as {@link MergingResourceProvider}s.
+ */
@Component
-public class MergedResourcePickerWhiteboard implements
ServiceTrackerCustomizer {
-
- private ServiceTracker tracker;
+public class MergedResourcePickerWhiteboard {
+
private BundleContext bundleContext;
- private final Map<Long, ServiceRegistration> serviceRegistrations = new
ConcurrentHashMap<Long, ServiceRegistration>();
+ private final Map<String, ServiceRegistration<ResourceProvider>>
resourceProvidersPerRoot = new ConcurrentHashMap<>();
Review comment:
I guess I'm not sure if the change from using the service id of the used
service as a key to using the merge root properties as a key is save. If you
know for a fact that there are no two services coming along with the same merge
root I guess it should be fine....
##########
File path:
src/main/java/org/apache/sling/resourcemerger/impl/MergedResourcePickerWhiteboard.java
##########
@@ -24,102 +24,96 @@
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.commons.osgi.PropertiesUtil;
import org.apache.sling.resourcemerger.spi.MergedResourcePicker;
import org.apache.sling.resourcemerger.spi.MergedResourcePicker2;
import org.apache.sling.spi.resource.provider.ResourceProvider;
import org.osgi.framework.BundleContext;
-import org.osgi.framework.Constants;
-import org.osgi.framework.InvalidSyntaxException;
-import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
-import org.osgi.util.tracker.ServiceTracker;
-import org.osgi.util.tracker.ServiceTrackerCustomizer;
-
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferencePolicy;
+
+/**
+ * Registers all {@link MergedResourcePicker} and {@link
MergedResourcePicker2} services as {@link MergingResourceProvider}s.
+ */
@Component
-public class MergedResourcePickerWhiteboard implements
ServiceTrackerCustomizer {
-
- private ServiceTracker tracker;
+public class MergedResourcePickerWhiteboard {
+
private BundleContext bundleContext;
- private final Map<Long, ServiceRegistration> serviceRegistrations = new
ConcurrentHashMap<Long, ServiceRegistration>();
+ private final Map<String, ServiceRegistration<ResourceProvider>>
resourceProvidersPerRoot = new ConcurrentHashMap<>();
@Activate
- protected void activate(final BundleContext bundleContext) throws
InvalidSyntaxException {
+ protected void activate(final BundleContext bundleContext) {
this.bundleContext = bundleContext;
- tracker = new ServiceTracker(bundleContext,
bundleContext.createFilter("(|(objectClass=" +
MergedResourcePicker.class.getName() +
- ")(objectClass=" + MergedResourcePicker2.class.getName() +
"))"), this);
- tracker.open();
}
@Deactivate
protected void deactivate() {
- tracker.close();
+ for (ServiceRegistration<ResourceProvider> resourceProvider :
resourceProvidersPerRoot.values()) {
+ resourceProvider.unregister();
+ }
}
- @Override
- public Object addingService(final ServiceReference reference) {
- final Object pickerObj = bundleContext.getService(reference);
- if ( pickerObj != null ) {
- final String mergeRoot =
PropertiesUtil.toString(reference.getProperty(MergedResourcePicker2.MERGE_ROOT),
null);
- if (mergeRoot != null) {
- boolean readOnly =
PropertiesUtil.toBoolean(reference.getProperty(MergedResourcePicker2.READ_ONLY),
true);
- boolean traverseParent =
PropertiesUtil.toBoolean(reference.getProperty(MergedResourcePicker2.TRAVERSE_PARENT),
false);
+ @Reference(policy = ReferencePolicy.DYNAMIC)
+ public void bindMergedResourcePicker(MergedResourcePicker resourcePicker,
Map<String, String> properties) {
+ final MergedResourcePicker2 resourcePicker2 = new
MergedResourcePicker2() {
- final MergedResourcePicker2 picker;
- if ( pickerObj instanceof MergedResourcePicker2 ) {
- picker = (MergedResourcePicker2)pickerObj;
- } else {
- final MergedResourcePicker deprecatedPicker =
(MergedResourcePicker)pickerObj;
- picker = new MergedResourcePicker2() {
-
- @Override
- public List<Resource> pickResources(ResourceResolver
resolver, String relativePath, Resource relatedResource) {
- return deprecatedPicker.pickResources(resolver,
relativePath);
- }
- };
- }
-
- MergingResourceProvider provider = readOnly ?
- new MergingResourceProvider(mergeRoot, picker, true,
traverseParent) :
- new CRUDMergingResourceProvider(mergeRoot, picker,
traverseParent);
-
- final Dictionary<Object, Object> props = new Hashtable<Object,
Object>();
- props.put(ResourceProvider.PROPERTY_NAME, readOnly ? "Merging"
: "CRUDMerging");
- props.put(ResourceProvider.PROPERTY_ROOT, mergeRoot);
- props.put(ResourceProvider.PROPERTY_MODIFIABLE, !readOnly);
- props.put(ResourceProvider.PROPERTY_AUTHENTICATE,
ResourceProvider.AUTHENTICATE_NO);
+ @Override
+ public List<Resource> pickResources(ResourceResolver resolver,
String relativePath, Resource relatedResource) {
+ return resourcePicker.pickResources(resolver, relativePath);
+ }
+ };
+ registerMergingResourceProvider(resourcePicker2, properties);
+ }
- final Long key = (Long)
reference.getProperty(Constants.SERVICE_ID);
- final ServiceRegistration reg =
bundleContext.registerService(ResourceProvider.class.getName(), provider,
props);
+ public void unbindMergedResourcePicker(Map<String, String> properties) {
+ unregisterMergingResourceProvider(properties);
+ }
- serviceRegistrations.put(key, reg);
- }
- return pickerObj;
- }
- return null;
+ @Reference(policy = ReferencePolicy.DYNAMIC)
+ public void bindMergedResourcePicker2(MergedResourcePicker2
resourcePicker, Map<String, String> properties) {
+ registerMergingResourceProvider(resourcePicker, properties);
}
- @Override
- public void modifiedService(final ServiceReference reference, final Object
service) {
- removedService(reference, service);
- addingService(reference);
+ public void unbindMergedResourcePicker2(Map<String, String> properties) {
+ unregisterMergingResourceProvider(properties);
}
- @Override
- public void removedService(final ServiceReference reference, final Object
service) {
- final Long key = (Long) reference.getProperty(Constants.SERVICE_ID);
- final ServiceRegistration reg = serviceRegistrations.get(key);
- if ( reg != null ) {
- reg.unregister();
- this.bundleContext.ungetService(reference);
+ private void registerMergingResourceProvider(MergedResourcePicker2
resourcePicker, Map<String, String> properties) {
+ final String mergeRoot =
properties.getOrDefault(MergedResourcePicker2.MERGE_ROOT, null);
+ if (mergeRoot != null) {
+ boolean readOnly =
PropertiesUtil.toBoolean(properties.get(MergedResourcePicker2.READ_ONLY), true);
+ boolean traverseParent =
PropertiesUtil.toBoolean(properties.get(MergedResourcePicker2.TRAVERSE_PARENT),
false);
+
+ MergingResourceProvider provider = readOnly ?
+ new MergingResourceProvider(mergeRoot, resourcePicker,
true, traverseParent) :
+ new CRUDMergingResourceProvider(mergeRoot, resourcePicker,
traverseParent);
+
+ final Dictionary<String, Object> props = new Hashtable<>();
+ props.put(ResourceProvider.PROPERTY_NAME, readOnly ? "Merging" :
"CRUDMerging");
+ props.put(ResourceProvider.PROPERTY_ROOT, mergeRoot);
+ props.put(ResourceProvider.PROPERTY_MODIFIABLE, !readOnly);
+ props.put(ResourceProvider.PROPERTY_AUTHENTICATE,
ResourceProvider.AUTHENTICATE_NO);
+
+ final ServiceRegistration<ResourceProvider> resourceProvider =
bundleContext.registerService(ResourceProvider.class, provider, props);
+ resourceProvidersPerRoot.put(mergeRoot, resourceProvider);
}
}
+ private void unregisterMergingResourceProvider(Map<String, String>
properties) {
+ final String mergeRoot =
properties.getOrDefault(MergedResourcePicker2.MERGE_ROOT, null);
+ if (mergeRoot != null) {
+ final ServiceRegistration<ResourceProvider> resourceProvider =
resourceProvidersPerRoot.get(mergeRoot);
+ if (resourceProvider != null) {
+ resourceProvider.unregister();
+ }
+ }
Review comment:
... but clearly, if not, this opens things up to some problems. Let's
say you have two services with the same merge root, previously, I think they
would have just both be registered (and eventually, unregistered when they go
away). Like this, you could have them both register and only one unregister, no?
##########
File path: bnd.bnd
##########
@@ -0,0 +1 @@
+Sling-Nodetypes: SLING-INF/nodetypes/resourcemerger.cnd
Review comment:
Should this have a new line at the end? If it doesn't matter I would put
one maybe (minor nitpick anyways).
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