/*
* 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.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.
*/
class AtomBindingInvoker implements Invoker {
Operation operation;
String uri;
HttpClient httpClient;
String authorizationHeader;
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());
}
/**
* Get operation invoker
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
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 entry =
AtomEntryUtil.readEntry("atom_1.0", new InputStreamReader(getMethod.getResponseBodyAsStream()));
msg.setBody(entry);
} 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
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
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 entry = (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();
AtomEntryUtil.writeEntry(entry, "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 =
AtomEntryUtil
.readEntry("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
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
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 entry = (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();
AtomEntryUtil.writeEntry(entry, "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 =
AtomEntryUtil.readEntry("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
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
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;
}
}
/**
* GetCollection operation invoker
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
public static class GetCollectionInvoker extends AtomBindingInvoker {
public GetCollectionInvoker(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
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
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
*
* @version $Rev: 567879 $ $Date: 2007-08-21 00:44:38 +0100 (Tue, 21 Aug 2007) $
*/
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);
}
}
}