diff options
Diffstat (limited to 'sandbox/event/modules/binding-feed/src/main/java/org/apache/tuscany/sca/binding/feed/provider/AtomBindingInvoker.java')
| -rw-r--r-- | sandbox/event/modules/binding-feed/src/main/java/org/apache/tuscany/sca/binding/feed/provider/AtomBindingInvoker.java | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/sandbox/event/modules/binding-feed/src/main/java/org/apache/tuscany/sca/binding/feed/provider/AtomBindingInvoker.java b/sandbox/event/modules/binding-feed/src/main/java/org/apache/tuscany/sca/binding/feed/provider/AtomBindingInvoker.java new file mode 100644 index 0000000000..45b35d9206 --- /dev/null +++ b/sandbox/event/modules/binding-feed/src/main/java/org/apache/tuscany/sca/binding/feed/provider/AtomBindingInvoker.java @@ -0,0 +1,345 @@ +/* + * 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.tuscany.sca.binding.feed.provider; + +import java.io.InputStreamReader; +import java.io.StringWriter; + +import org.apache.commons.httpclient.HttpClient; +import org.apache.commons.httpclient.methods.DeleteMethod; +import org.apache.commons.httpclient.methods.GetMethod; +import org.apache.commons.httpclient.methods.PostMethod; +import org.apache.commons.httpclient.methods.PutMethod; +import org.apache.commons.httpclient.methods.StringRequestEntity; +import org.apache.tuscany.sca.binding.feed.collection.NotFoundException; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.invocation.Invoker; +import org.apache.tuscany.sca.invocation.Message; +import org.apache.tuscany.sca.invocation.DataExchangeSemantics; +import org.osoa.sca.ServiceRuntimeException; + +import com.sun.syndication.feed.atom.Entry; +import com.sun.syndication.feed.atom.Feed; +import com.sun.syndication.io.WireFeedInput; +import com.sun.syndication.io.XmlReader; + +/** + * Invoker for the Atom binding. + * + * @version $Rev$ $Date$ + */ +class AtomBindingInvoker implements Invoker, DataExchangeSemantics { + + Operation operation; + String uri; + HttpClient httpClient; + String authorizationHeader; + + //FIXME Support conversion to/from data api entries + + AtomBindingInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + this.operation = operation; + this.uri = uri; + this.httpClient = httpClient; + this.authorizationHeader = authorizationHeader; + } + + public Message invoke(Message msg) { + // Shouldn't get here, as the only supported methods are + // defined in the ResourceCollection interface, and implemented + // by specific invoker subclasses + throw new UnsupportedOperationException(operation.getName()); + } + + public boolean allowsPassByReference() { + return true; + } + + /** + * Get operation invoker + */ + public static class GetInvoker extends AtomBindingInvoker { + + public GetInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + + // Get an entry + String id = (String)((Object[])msg.getBody())[0]; + + // Send an HTTP GET + GetMethod getMethod = new GetMethod(uri + "/" + id); + getMethod.setRequestHeader("Authorization", authorizationHeader); + try { + httpClient.executeMethod(getMethod); + int status = getMethod.getStatusCode(); + + // Read the Atom entry + if (status == 200) { + Entry feedEntry = + AtomFeedEntryUtil.readFeedEntry("atom_1.0", new InputStreamReader(getMethod.getResponseBodyAsStream())); + msg.setBody(feedEntry); + + } else if (status == 404) { + msg.setFaultBody(new NotFoundException()); + } else { + msg.setFaultBody(new ServiceRuntimeException("HTTP status code: " + status)); + } + + } catch (Exception e) { + msg.setFaultBody(new ServiceRuntimeException(e)); + } finally { + getMethod.releaseConnection(); + } + + return msg; + } + } + + /** + * Post operation invoker + */ + public static class PostInvoker extends AtomBindingInvoker { + + public PostInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + + // Post an entry + Entry feedEntry = (Entry)((Object[])msg.getBody())[0]; + + // Send an HTTP POST + PostMethod postMethod = new PostMethod(uri); + postMethod.setRequestHeader("Authorization", authorizationHeader); + try { + + // Write the Atom entry + StringWriter writer = new StringWriter(); + AtomFeedEntryUtil.writeFeedEntry(feedEntry, "atom_1.0", writer); + postMethod.setRequestHeader("Content-type", "application/atom+xml; charset=utf-8"); + postMethod.setRequestEntity(new StringRequestEntity(writer.toString())); + + httpClient.executeMethod(postMethod); + int status = postMethod.getStatusCode(); + + // Read the Atom entry + if (status == 200 || status == 201) { + Entry createdEntry = + AtomFeedEntryUtil + .readFeedEntry("atom_1.0", new InputStreamReader(postMethod.getResponseBodyAsStream())); + msg.setBody(createdEntry); + + } else if (status == 404) { + msg.setFaultBody(new NotFoundException()); + } else { + msg.setFaultBody(new ServiceRuntimeException("HTTP status code: " + status)); + } + + } catch (Exception e) { + msg.setFaultBody(new ServiceRuntimeException(e)); + } finally { + postMethod.releaseConnection(); + } + + return msg; + } + } + + /** + * Put operation invoker + */ + public static class PutInvoker extends AtomBindingInvoker { + + public PutInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + + // Put an entry + Object[] args = (Object[])msg.getBody(); + String id = (String)args[0]; + Entry feedEntry = (Entry)args[1]; + + // Send an HTTP PUT + PutMethod putMethod = new PutMethod(uri + "/" + id); + putMethod.setRequestHeader("Authorization", authorizationHeader); + try { + + // Write the Atom entry + StringWriter writer = new StringWriter(); + AtomFeedEntryUtil.writeFeedEntry(feedEntry, "atom_1.0", writer); + putMethod.setRequestHeader("Content-type", "application/atom+xml; charset=utf-8"); + putMethod.setRequestEntity(new StringRequestEntity(writer.toString())); + + httpClient.executeMethod(putMethod); + int status = putMethod.getStatusCode(); + + // Read the Atom entry + if (status == 200 || status == 201) { + try { + Entry updatedEntry = + AtomFeedEntryUtil.readFeedEntry("atom_1.0", new InputStreamReader(putMethod + .getResponseBodyAsStream())); + msg.setBody(updatedEntry); + } catch (Exception e) { + // Returning the updated entry is optional + } + + } else if (status == 404) { + msg.setFaultBody(new NotFoundException()); + } else { + msg.setFaultBody(new ServiceRuntimeException("HTTP status code: " + status)); + } + + } catch (Exception e) { + msg.setFaultBody(new ServiceRuntimeException(e)); + } finally { + putMethod.releaseConnection(); + } + + return msg; + } + } + + /** + * Delete operation invoker + */ + public static class DeleteInvoker extends AtomBindingInvoker { + + public DeleteInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + + // Delete an entry + String id = (String)((Object[])msg.getBody())[0]; + + // Send an HTTP DELETE + DeleteMethod deleteMethod = new DeleteMethod(uri + "/" + id); + deleteMethod.setRequestHeader("Authorization", authorizationHeader); + try { + httpClient.executeMethod(deleteMethod); + int status = deleteMethod.getStatusCode(); + + // Read the Atom entry + if (status == 200) { + msg.setBody(null); + + } else if (status == 404) { + msg.setFaultBody(new NotFoundException()); + } else { + msg.setFaultBody(new ServiceRuntimeException("HTTP status code: " + status)); + } + + } catch (Exception e) { + msg.setFaultBody(new ServiceRuntimeException(e)); + } finally { + deleteMethod.releaseConnection(); + } + + return msg; + } + } + + /** + * GetAll operation invoker + */ + public static class GetAllInvoker extends AtomBindingInvoker { + + public GetAllInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + + // Get a feed + + // Send an HTTP GET + GetMethod getMethod = new GetMethod(uri); + getMethod.setRequestHeader("Authorization", authorizationHeader); + try { + httpClient.executeMethod(getMethod); + int status = getMethod.getStatusCode(); + + // Read the Atom feed + if (status == 200) { + WireFeedInput input = new WireFeedInput(); + Feed feed = (Feed)input.build(new XmlReader(getMethod.getResponseBodyAsStream())); + msg.setBody(feed); + + } else if (status == 404) { + msg.setFaultBody(new NotFoundException()); + } else { + msg.setFaultBody(new ServiceRuntimeException("HTTP status code: " + status)); + } + + } catch (Exception e) { + msg.setFaultBody(new ServiceRuntimeException(e)); + } finally { + getMethod.releaseConnection(); + } + + return msg; + } + } + + /** + * PostMedia operation invoker + */ + public static class PostMediaInvoker extends AtomBindingInvoker { + + public PostMediaInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + // TODO implement + return super.invoke(msg); + } + } + + /** + * PutMedia operation invoker + */ + public static class PutMediaInvoker extends AtomBindingInvoker { + + public PutMediaInvoker(Operation operation, String uri, HttpClient httpClient, String authorizationHeader) { + super(operation, uri, httpClient, authorizationHeader); + } + + @Override + public Message invoke(Message msg) { + // TODO implement + return super.invoke(msg); + } + } + +} |