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Posted to commits@sling.apache.org by ro...@apache.org on 2017/10/18 23:19:42 UTC
[sling-org-apache-sling-discovery-support] 01/23: Create new
support module
This is an automated email from the ASF dual-hosted git repository.
rombert pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/sling-org-apache-sling-discovery-support.git
commit 2cf6b3722c7004331aa65febc243329fbc7b50cc
Author: Carsten Ziegeler <cz...@apache.org>
AuthorDate: Tue May 14 08:09:45 2013 +0000
Create new support module
git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1482245 13f79535-47bb-0310-9956-ffa450edef68
---
.../impl/support/StandardPropertyProvider.java | 219 +++++++++++++++++++++
1 file changed, 219 insertions(+)
diff --git a/src/main/java/org/apache/sling/discovery/impl/support/StandardPropertyProvider.java b/src/main/java/org/apache/sling/discovery/impl/support/StandardPropertyProvider.java
new file mode 100644
index 0000000..dacdb7a
--- /dev/null
+++ b/src/main/java/org/apache/sling/discovery/impl/support/StandardPropertyProvider.java
@@ -0,0 +1,219 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.sling.discovery.impl.standalone;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Dictionary;
+import java.util.HashMap;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Modified;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.ReferencePolicy;
+import org.apache.sling.discovery.InstanceDescription;
+import org.apache.sling.discovery.PropertyProvider;
+import org.osgi.framework.Constants;
+import org.osgi.framework.ServiceReference;
+import org.osgi.framework.ServiceRegistration;
+import org.osgi.service.component.ComponentContext;
+import org.osgi.service.http.HttpService;
+
+/**
+ * This service provides the standard instance properties (if available)
+ */
+@Component(immediate=true)
+@Reference(referenceInterface=HttpService.class,
+ cardinality=ReferenceCardinality.OPTIONAL_MULTIPLE,
+ policy=ReferencePolicy.DYNAMIC)
+public class StandardPropertyProvider {
+
+ /** Endpoint service registration property from RFC 189 */
+ private static final String REG_PROPERTY_ENDPOINTS = "osgi.http.service.endpoints";
+
+ private volatile long changeCount;
+
+ private String instanceName;
+
+ private String instanceDescription;
+
+ private ServiceRegistration propagationService;
+
+ private final Map<Long, String[]> endpoints = new HashMap<Long, String[]>();
+
+ private String endpointString;
+
+ private Dictionary<String, Object> getRegistrationProperties() {
+ final List<String> names = new ArrayList<String>();
+ if ( this.instanceName != null ) {
+ names.add(InstanceDescription.PROPERTY_NAME);
+ }
+ if ( this.instanceDescription != null ) {
+ names.add(InstanceDescription.PROPERTY_DESCRIPTION);
+ }
+ names.add(InstanceDescription.PROPERTY_ENDPOINTS);
+
+ final StringBuilder sb = new StringBuilder();
+ boolean first = true;
+ synchronized ( this.endpoints ) {
+ for(final String[] points : endpoints.values()) {
+ for(final String point : points) {
+ if ( first ) {
+ first = false;
+ } else {
+ sb.append(",");
+ }
+ sb.append(point);
+ }
+ }
+ }
+ this.endpointString = sb.toString();
+
+ final Dictionary<String, Object> serviceProps = new Hashtable<String, Object>();
+ serviceProps.put(PropertyProvider.PROPERTY_PROPERTIES, names.toArray(new String[names.size()]));
+ // we add a changing property to the service registration
+ // to make sure a modification event is really sent
+ synchronized ( this ) {
+ serviceProps.put("changeCount", this.changeCount++);
+ }
+ return serviceProps;
+ }
+
+ private String getPropertyValue(final ComponentContext bc, final String key) {
+ Object value = bc.getProperties().get(key);
+ if ( value == null ) {
+ value = bc.getBundleContext().getProperty(key);
+ }
+ if ( value != null ) {
+ return value.toString();
+ }
+ return null;
+ }
+
+ @Activate
+ protected void activate(final ComponentContext cc) {
+ this.modified(cc);
+ }
+
+ @Modified
+ protected void modified(final ComponentContext cc) {
+ this.instanceName = this.getPropertyValue(cc, "sling.name");
+ this.instanceDescription = this.getPropertyValue(cc, "sling.description");
+
+ this.propagationService = cc.getBundleContext().registerService(PropertyProvider.class.getName(),
+ new PropertyProvider() {
+
+ public String getProperty(final String name) {
+ if ( InstanceDescription.PROPERTY_DESCRIPTION.equals(name) ) {
+ return instanceDescription;
+ }
+ if ( InstanceDescription.PROPERTY_NAME.equals(name) ) {
+ return instanceName;
+ }
+ if ( InstanceDescription.PROPERTY_ENDPOINTS.equals(name) ) {
+ return endpointString;
+ }
+ return null;
+ }
+ }, this.getRegistrationProperties());
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ if ( this.propagationService != null ) {
+ this.propagationService.unregister();
+ this.propagationService = null;
+ }
+ }
+
+ /**
+ * Bind a http service
+ */
+ protected void bindHttpService(final ServiceReference reference) {
+ final String[] endpointUrls = toStringArray(reference.getProperty(REG_PROPERTY_ENDPOINTS));
+ if ( endpointUrls != null ) {
+ synchronized ( this.endpoints ) {
+ this.endpoints.put((Long)reference.getProperty(Constants.SERVICE_ID), endpointUrls);
+ }
+ if ( this.propagationService != null ) {
+ this.propagationService.setProperties(this.getRegistrationProperties());
+ }
+ }
+ }
+
+ /**
+ * Unbind a http service
+ */
+ protected void unbindHttpService(final ServiceReference reference) {
+ boolean changed = false;
+ synchronized ( this.endpoints ) {
+ if ( this.endpoints.remove(reference.getProperty(Constants.SERVICE_ID)) != null ) {
+ changed = true;
+ }
+ }
+ if ( changed && this.propagationService != null ) {
+ this.propagationService.setProperties(this.getRegistrationProperties());
+ }
+ }
+
+ private String[] toStringArray(final Object propValue) {
+ if (propValue == null) {
+ // no value at all
+ return null;
+
+ } else if (propValue instanceof String) {
+ // single string
+ return new String[] { (String) propValue };
+
+ } else if (propValue instanceof String[]) {
+ // String[]
+ return (String[]) propValue;
+
+ } else if (propValue.getClass().isArray()) {
+ // other array
+ Object[] valueArray = (Object[]) propValue;
+ List<String> values = new ArrayList<String>(valueArray.length);
+ for (Object value : valueArray) {
+ if (value != null) {
+ values.add(value.toString());
+ }
+ }
+ return values.toArray(new String[values.size()]);
+
+ } else if (propValue instanceof Collection<?>) {
+ // collection
+ Collection<?> valueCollection = (Collection<?>) propValue;
+ List<String> valueList = new ArrayList<String>(valueCollection.size());
+ for (Object value : valueCollection) {
+ if (value != null) {
+ valueList.add(value.toString());
+ }
+ }
+ return valueList.toArray(new String[valueList.size()]);
+ }
+
+ return null;
+ }
+}
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