/**
* 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.view.pig.resources.udf;
import com.google.inject.Inject;
import org.apache.ambari.view.ViewResourceHandler;
import org.apache.ambari.view.pig.persistence.utils.ItemNotFound;
import org.apache.ambari.view.pig.persistence.utils.OnlyOwnersFilteringStrategy;
import org.apache.ambari.view.pig.resources.PersonalCRUDResourceManager;
import org.apache.ambari.view.pig.resources.udf.models.UDF;
import org.apache.ambari.view.pig.services.BaseService;
import org.json.simple.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.*;
import javax.ws.rs.core.*;
import java.util.List;
/**
* Servlet for UDFs
* API:
* GET /
* get all UDFs
* GET /:id
* get one UDF
* PUT /:id
* update UDF
* POST /
* create new UDF
* Required: path, name
*/
public class UDFService extends BaseService {
@Inject
ViewResourceHandler handler;
protected UDFResourceManager resourceManager = null;
protected final static Logger LOG =
LoggerFactory.getLogger(UDFService.class);
protected synchronized PersonalCRUDResourceManager<UDF> getResourceManager() {
if (resourceManager == null) {
resourceManager = new UDFResourceManager(context);
}
return resourceManager;
}
/**
* Get single item
*/
@GET
@Path("{udfId}")
@Produces(MediaType.APPLICATION_JSON)
public Response getUDF(@PathParam("udfId") String udfId) {
UDF udf = null;
try {
udf = getResourceManager().read(udfId);
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
JSONObject object = new JSONObject();
object.put("udf", udf);
return Response.ok(object).build();
}
/**
* Delete single item
*/
@DELETE
@Path("{udfId}")
public Response deleteUDF(@PathParam("udfId") String udfId) {
try {
getResourceManager().delete(udfId);
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
return Response.status(204).build();
}
/**
* Get all UDFs
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getUDFList(@Context UriInfo ui) {
LOG.debug("Getting all UDFs");
List allUDFs = getResourceManager().readAll(
new OnlyOwnersFilteringStrategy(this.context.getUsername()));
JSONObject object = new JSONObject();
object.put("udfs", allUDFs);
return Response.ok(object).build();
}
/**
* Update item
*/
@PUT
@Path("{udfId}")
@Consumes(MediaType.APPLICATION_JSON)
public Response updateUDF(UDFRequest request,
@PathParam("udfId") String udfId) {
try {
getResourceManager().update(request.udf, udfId);
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
return Response.status(204).build();
}
/**
* Create UDF
*/
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response createUDF(UDFRequest request, @Context HttpServletResponse response,
@Context UriInfo ui) {
getResourceManager().create(request.udf);
UDF udf = null;
try {
udf = getResourceManager().read(request.udf.getId());
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
response.setHeader("Location",
String.format("%s/%s", ui.getAbsolutePath().toString(), request.udf.getId()));
JSONObject object = new JSONObject();
object.put("udf", udf);
return Response.ok(object).status(201).build();
}
/**
* Wrapper object for json mapping
*/
public static class UDFRequest {
public UDF udf;
}
}