/**
* 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.ambari.server.api.services;
import org.apache.ambari.server.api.resources.ResourceInstance;
import org.apache.ambari.server.controller.spi.Resource;
import org.apache.ambari.server.orm.entities.ViewEntity;
import org.apache.ambari.server.orm.entities.ViewInstanceEntity;
import org.apache.ambari.view.ViewResourceHandler;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import java.util.HashMap;
import java.util.Map;
/**
* View sub-resource service.
*/
public class ViewSubResourceService extends BaseService implements ViewResourceHandler {
/**
* The type of the sub-resource.
*/
private final Resource.Type type;
/**
* The associated view name.
*/
private final String viewName;
/**
* The view version.
*/
private final String version;
/**
* The associated view instance name.
*/
private final String instanceName;
// ----- Constructors ------------------------------------------------------
/**
* Construct a view sub-resource service.
*/
public ViewSubResourceService(Resource.Type type, ViewInstanceEntity viewInstanceDefinition) {
ViewEntity viewEntity = viewInstanceDefinition.getViewEntity();
this.type = type;
this.viewName = viewEntity.getCommonName();
this.version = viewEntity.getVersion();
this.instanceName = viewInstanceDefinition.getName();
}
// ----- ViewResourceHandler -----------------------------------------------
@Override
public Response handleRequest(HttpHeaders headers, UriInfo ui,
RequestType requestType, MediaType mediaType,
String resourceId) {
return handleRequest(headers, null, ui, getRequestType(requestType),
getMediaType(mediaType), createResource(resourceId));
}
@Override
public Response handleRequest(HttpHeaders headers, UriInfo ui, String resourceId) {
return handleRequest(headers, null, ui, Request.Type.GET,
createResource(resourceId));
}
// ----- helper methods ----------------------------------------------------
// create a resource with the given id
protected ResourceInstance createResource(String resourceId) {
Map<Resource.Type,String> mapIds = new HashMap<Resource.Type,String>();
mapIds.put(Resource.Type.View, viewName);
mapIds.put(Resource.Type.ViewVersion, version);
mapIds.put(Resource.Type.ViewInstance, instanceName);
if (resourceId != null) {
mapIds.put(type, resourceId);
}
return super.createResource(type, mapIds);
}
// get the internal request type from the view API request type
private Request.Type getRequestType(RequestType type) {
switch (type) {
case GET:
return Request.Type.GET;
case POST:
return Request.Type.POST;
case PUT:
return Request.Type.PUT;
case DELETE:
return Request.Type.DELETE;
case QUERY_POST:
return Request.Type.QUERY_POST;
}
throw new IllegalArgumentException("Unknown resource type " + type);
}
// get the JAX-RS media type from the view media type
private javax.ws.rs.core.MediaType getMediaType(MediaType type) {
switch (type) {
case TEXT_PLAIN:
return javax.ws.rs.core.MediaType.TEXT_PLAIN_TYPE;
case APPLICATION_JSON:
return javax.ws.rs.core.MediaType.APPLICATION_JSON_TYPE;
}
throw new IllegalArgumentException("Unknown media type " + type);
}
}