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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main')
5 files changed, 402 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/AggregatorImpl.java b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/AggregatorImpl.java new file mode 100644 index 0000000000..506701168e --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/AggregatorImpl.java @@ -0,0 +1,199 @@ +/* + * 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 feed; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.OutputStreamWriter; +import java.util.ArrayList; +import java.util.Date; +import java.util.List; + +import org.apache.abdera.Abdera; +import org.apache.abdera.factory.Factory; +import org.apache.abdera.model.Document; +import org.apache.abdera.model.Entry; +import org.apache.abdera.model.Feed; +import org.apache.abdera.model.Person; +import org.apache.abdera.parser.Parser; +import org.apache.tuscany.sca.binding.atom.collection.Collection; +import org.apache.tuscany.sca.binding.atom.collection.NotFoundException; +import org.osoa.sca.annotations.Property; +import org.osoa.sca.annotations.Reference; + +import com.sun.syndication.feed.synd.SyndFeed; +import com.sun.syndication.io.SyndFeedOutput; + +/** + * Implementation of an SCA component that aggregates several + * Atom and RSS feeds. + * + * @version $Rev$ $Date$ + */ +public class AggregatorImpl implements org.apache.tuscany.sca.binding.atom.collection.Collection { + + @Reference(required = false) + public Collection atomFeed1; + @Reference(required = false) + public Collection atomFeed2; + + @Reference(required = false) + public org.apache.tuscany.sca.binding.rss.collection.Collection rssFeed1; + @Reference(required = false) + public org.apache.tuscany.sca.binding.rss.collection.Collection rssFeed2; + + @Reference(required = false) + public Sort sort; + + @Property + public String feedTitle = "Aggregated Feed"; + @Property + public String feedDescription = "Anonymous Aggregated Feed"; + @Property + public String feedAuthor = "anonymous"; + + public Feed getFeed() { + + // Create a new Feed + Factory factory = Abdera.getNewFactory(); + Feed feed = factory.newFeed(); + feed.setTitle(feedTitle); + feed.setSubtitle(feedDescription); + Person author = factory.newAuthor(); + author.setName(feedAuthor); + feed.addAuthor(author); + feed.addLink("http://tuscany.apache.org/", "alternate"); + + // Aggregate entries from atomFeed1, atomFeed2, rssFeed1 and rssFeed2 + List<Entry> entries = new ArrayList<Entry>(); + if (atomFeed1 != null) { + try { + entries.addAll(atomFeed1.getFeed().getEntries()); + } catch (Exception e) { + int x = 0; + } + } + if (atomFeed2 != null) { + try { + entries.addAll(atomFeed2.getFeed().getEntries()); + } catch (Exception e) { + int x = 0; + + } + } + if (rssFeed1 != null) { + try { + entries.addAll(atomFeed(rssFeed1.getFeed()).getEntries()); + } catch (Exception e) { + int x = 0; + + } + } + if (rssFeed2 != null) { + try { + entries.addAll(atomFeed(rssFeed2.getFeed()).getEntries()); + } catch (Exception e) { + int x = 0; + + } + } + + // Sort entries by updated date + if (sort != null) { + entries = sort.sort(entries); + } + + // Add the entries to the new feed + // Also synthesize a feed id and updated field base on entries + Date feedUpdated = new Date( 0 ); + for (Entry entry: entries) { + Date entryUpdated = entry.getUpdated(); + if (( entryUpdated != null ) && ( entryUpdated.compareTo( feedUpdated ) > 0 )) { + feedUpdated = entryUpdated; + } + feed.addEntry(entry); + } + feed.setUpdated( feedUpdated ); + // Note that feed id should be permanent, immutable, and unique + // in order to support proper ETag creation. + // Tough to do when the feed is regenerated with each get. + feed.setId( "http://tuscany.apache.org/feed", true ); + + return feed; + } + + public Feed query(String queryString) { + Factory factory = Abdera.getNewFactory(); + Feed feed = factory.newFeed(); + feed.setTitle(feedTitle); + feed.setSubtitle(feedDescription); + Person author = factory.newAuthor(); + author.setName(feedAuthor); + feed.addAuthor(author); + feed.addLink("http://tuscany.apache.org", "alternate"); + + Feed allFeed = getFeed(); + if (queryString.startsWith("title=")) { + String title = queryString.substring(6); + + for (Entry entry: allFeed.getEntries()) { + if (entry.getTitle().contains(title)) { + feed.addEntry(entry); + } + } + } + return feed; + } + + public void delete(String id) throws NotFoundException { + } + + public Entry get(String id) throws NotFoundException { + return null; + } + + public Entry post(Entry entry) { + return null; + } + + public void put(String id, Entry entry) throws NotFoundException { + } + + /** + * Convert a ROME feed to an Abdera feed. + * + * @param romeFeed + * @return + */ + private static Feed atomFeed(SyndFeed syndFeed) { + ByteArrayOutputStream bos = new ByteArrayOutputStream(); + + syndFeed.setFeedType("atom_1.0"); + SyndFeedOutput syndOutput = new SyndFeedOutput(); + try { + syndOutput.output(syndFeed, new OutputStreamWriter(bos, "UTF-8")); + } catch (Exception e) { + throw new RuntimeException(e); + } + Parser parser = Abdera.getNewParser(); + Document<Feed> document = parser.parse(new ByteArrayInputStream(bos.toByteArray())); + + return document.getRoot(); + } +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/Sort.java b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/Sort.java new file mode 100644 index 0000000000..dec073c36b --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/Sort.java @@ -0,0 +1,38 @@ +/* + * 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 feed; + +import java.util.List; + +import org.apache.abdera.model.Entry; + +/** + * The Sort service business interface. + * + * @version $Rev$ $Date$ + */ +public interface Sort { + + /** + * Sort feed entries by published date. + * @param entries + * @return + */ + List<Entry> sort(List<Entry> entries); +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/SortImpl.java b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/SortImpl.java new file mode 100644 index 0000000000..f7ead126a7 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/feed/SortImpl.java @@ -0,0 +1,57 @@ +/* + * 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 feed; + +import java.util.Arrays; +import java.util.Comparator; +import java.util.Date; +import java.util.List; + +import org.apache.abdera.model.Entry; +import org.osoa.sca.annotations.Property; + +/** + * Implementation of a Feed Sort service component. + * + * @version $Rev$ $Date$ + */ +public class SortImpl implements Sort { + + @Property + public boolean newFirst = true; + + @SuppressWarnings("unchecked") + public List<Entry> sort(List<Entry> entries) { + Entry[] entriesArray = new Entry[entries.size()]; + entriesArray = (Entry[])entries.toArray(entriesArray); + Arrays.sort(entriesArray, new Comparator() { + public int compare(final Object xObj, final Object yObj) { + Date xDate = ((Entry)xObj).getUpdated(); + Date yDate = ((Entry)yObj).getUpdated(); + if (xDate == null) + return -1; + if (newFirst) + return yDate.compareTo(xDate); + else + return xDate.compareTo(yDate); + } + }); + return Arrays.asList(entriesArray); + } +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/launch/LaunchFeedServer.java b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/launch/LaunchFeedServer.java new file mode 100644 index 0000000000..1c549f7cd2 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/java/launch/LaunchFeedServer.java @@ -0,0 +1,47 @@ +/* + * 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 launch; + +import java.io.IOException; + +import org.apache.tuscany.sca.host.embedded.SCADomain; + +public class LaunchFeedServer { + public static void main(String[] args) throws Exception { + SCADomain scaDomain = SCADomain.newInstance("FeedAggregator.composite"); + + try { + System.out.println("Sample Feed server started (press enter to shutdown)"); + System.out.println(); + System.out.println("To read the aggregated feeds, point your Web browser to the following addresses:"); + System.out.println("http://localhost:8083/atomAggregator"); + System.out.println("http://localhost:8083/atomAggregator/atomsvc (for the Atom service document)"); + System.out.println("http://localhost:8083/rssAggregator"); + System.out.println(); + System.in.read(); + } catch (IOException e) { + e.printStackTrace(); + } + + + scaDomain.close(); + System.out.println("Sample Feed server stopped"); + } +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/resources/FeedAggregator.composite b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/resources/FeedAggregator.composite new file mode 100644 index 0000000000..018effc298 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/samples/feed-aggregator/src/main/resources/FeedAggregator.composite @@ -0,0 +1,61 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!-- + * 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. +--> +<composite xmlns="http://www.osoa.org/xmlns/sca/1.0" + xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.0" + targetNamespace="http://aggregator" + name="FeedAggregator"> + + <service name="rssSample" promote="RssAggregator"> + <tuscany:binding.atom uri="http://localhost:8083/rssAggregator"/> + </service> + <service name="atomSample" promote="AtomAggregator"> + <tuscany:binding.atom uri="http://localhost:8083/atomAggregator"/> + </service> + + <component name="RssAggregator"> + <implementation.java class="feed.AggregatorImpl"/> + <reference name="rssFeed1"> + <tuscany:binding.rss uri="http://newsrss.bbc.co.uk/rss/newsonline_uk_edition/world/rss.xml"/> + </reference> + <reference name="rssFeed2"> + <tuscany:binding.rss uri="http://www.engadget.com/rss.xml"/> + </reference> + <reference name="sort" target="Sort"/> + <property name="feedTitle">RSS Aggregator Sample</property> + </component> + + <component name="Sort"> + <implementation.java class="feed.SortImpl"/> + <property name="newFirst">true</property> + </component> + + <component name="AtomAggregator"> + <implementation.java class="feed.AggregatorImpl"/> + <reference name="sort" target="Sort"/>
+ <reference name="atomFeed1"> + <tuscany:binding.atom uri="http://apache-tuscany.blogspot.com/feeds/posts/default"/> + </reference> + <reference name="atomFeed2"> + <tuscany:binding.atom uri="http://feeds.feedburner.com/blogspot/Dcni?format=xml"/> + </reference> + <property name="feedTitle">Atom Aggregator Sample</property> + </component> + +</composite> |