Migration from Apache Abdera to Apache Wink
Apache Wink is an excellent the perfect solution for consuming and producing Atom, APP and RSS documents. The following section describes how to migrate from Apache Abdera to Apache Wink by providing a set of examples that cover most use cases.
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This section contains the following topics:
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Apache Abdera version 0.4 does not support RSS write.
Apache Wink
Same as in #22) b) Producing Atom Documents - the JAX-RS way. However the resource method now returns an RssFeed object instead of AtomFeed object.
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5) Writing Atom Publishing Protocol (APP) Server
In order to write and publish an APP server using Apache Abdera and Apache Wink perform the following steps:
The following scenario explains The following steps explain how to implement an APP server as described in the following beautiful article by James Snell: http://www.ibm.com/developerworks/library/x-atompp1/
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Make sure that the APP_Server_Abdera.war and the APP_Server_Wink.war provided in the previous example are deployed before running this examplethese examples. |
Apache Abdera - Click on link to Download - APP_Client_Abdera.java
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1. Acessing Service Document:
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Document<Service> introspection = abderaClient.get(SERVICE_URL).getDocument();
Service service = introspection.getRoot();
List<Workspace> workspaces = service.getWorkspaces();
for (Workspace workspace : workspaces) {
System.out.println("\t" + workspace.getTitle());
List<Collection> collections = workspace.getCollections();
for (Collection collection : collections) {
System.out.println("\t" + collection.getTitle() + "\t:\t" + collection.getHref());
}
System.out.print("\n");
}
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2. Getting a Feed | Code Block |
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RequestOptions opts = new RequestOptions();
opts.setContentType("application/atom+xml;type=feed");
ClientResponse response = abderaClient.get(FEED_URL, opts);
Feed feed = (Feed)response.getDocument().getRoot();
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3. Posting an entry to a Feed
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RequestOptions opts = new RequestOptions();
opts.setContentType("application/atom+xml;type=entry");
ClientResponse response = abderaClient.post(FEED_URL, newEntry, opts);
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4. Putting a change to an Entry
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RequestOptions opts = new RequestOptions();
opts.setContentType("application/atom+xml;type=entry");
ClientResponse response = abderaClient.put(ENTRY_URL, changedEntry.getDocument(), opts);
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5. Getting an Entry
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RequestOptions opts = new RequestOptions();
opts.setContentType("application/atom+xml;type=entry");
ClientResponse response = abderaClient.get(ENTRY_URL, opts);
Entry entry = (Entry)response.getDocument().getRoot();
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6. Deleting an Entry
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ClientResponse response = abderaClient.delete(ENTRY_URL);
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Apache Wink - Click on link to Download - APP_Client_Wink.java
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1. Acessing Service Document:
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Resource resource = restClient.resource(SERVICE_URL);
AppService service = resource.accept(MediaTypeUtils.ATOM_SERVICE_DOCUMENT).get(AppService.class);
List<AppWorkspace> workspaces = service.getWorkspace();
for (AppWorkspace workspace : workspaces) {
System.out.println("\t" + workspace.getTitle().getValue());
List<AppCollection> collections = workspace.getCollection();
for (AppCollection collection : collections) {
System.out.println("\t" + collection.getTitle().getValue()
+ "\t:\t"
+ collection.getHref());
}
System.out.print("\n");
}
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2. Getting a Feed
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Resource feedResource = restClient.resource(FEED_URL);
AtomFeed feed = feedResource.accept(MediaType.APPLICATION_ATOM_XML).get(AtomFeed.class);
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3. Posting an entry to a Feed
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Resource feedResource = restClient.resource(FEED_URL);
ClientResponse response =
feedResource.contentType(MediaType.APPLICATION_ATOM_XML).post(newEntry);
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4. Putting a change to an Entry
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Resource feedResource = restClient.resource(ENTRY_URL);
ClientResponse response =
feedResource.contentType(MediaType.APPLICATION_ATOM_XML).put(changedEntry);
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5. Getting an Entry
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Resource feedResource = restClient.resource(ENTRY_URL);
AtomEntry atomEntry = feedResource.accept(MediaType.APPLICATION_ATOM_XML).get(AtomEntry.class);
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6. Deleting an Entry
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Resource feedResource = restClient.resource(ENTRY_URL);
ClientResponse response = feedResource.delete();
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