/**
* 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.jobs;
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.files.FileResource;
import org.apache.ambari.view.pig.resources.jobs.models.PigJob;
import org.apache.ambari.view.pig.services.BaseService;
import org.apache.ambari.view.pig.utils.FilePaginator;
import org.json.simple.JSONObject;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.*;
import javax.ws.rs.core.*;
import javax.xml.ws.WebServiceException;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.Callable;
/**
* Servlet for Pig Jobs
* API:
* GET /:id
* read job info
* POST /
* create new job
* Required: scriptId
* Optional: params
* GET /
* get all jobs of current user
* GET /:id/notify
* callback from Templeton
*/
public class JobService extends BaseService {
@Inject
ViewResourceHandler handler;
protected JobResourceManager resourceManager = null;
/**
* Get resource manager object
* @return resource manager object
*/
public synchronized JobResourceManager getResourceManager() {
if (resourceManager == null) {
resourceManager = new JobResourceManager(context);
}
return resourceManager;
}
/**
* Set resource manager object
* @param resourceManager resource manager object
*/
public synchronized void setResourceManager(JobResourceManager resourceManager) {
this.resourceManager = resourceManager;
}
/**
* Get single item
*/
@GET
@Path("{jobId}")
@Produces(MediaType.APPLICATION_JSON)
public Response getJob(@PathParam("jobId") String jobId) {
PigJob job = null;
try {
job = getResourceManager().read(jobId);
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
getResourceManager().retrieveJobStatus(job);
JSONObject object = new JSONObject();
object.put("job", job);
return Response.ok(object).build();
}
/**
* Get single item
*/
@DELETE
@Path("{jobId}")
public Response killJob(@PathParam("jobId") String jobId) throws IOException {
PigJob job = null;
try {
job = getResourceManager().read(jobId);
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
getResourceManager().killJob(job);
return Response.status(204).build();
}
/**
* Callback from templeton
*/
@GET
@Path("{jobId}/notify")
public Response jobCompletionNotification(@Context HttpHeaders headers,
@Context UriInfo ui,
@PathParam("jobId") final String jobId) {
PigJob job = null;
try {
job = getResourceManager().ignorePermissions(new Callable<PigJob>() {
public PigJob call() throws Exception {
PigJob job = null;
try {
job = getResourceManager().read(jobId);
} catch (ItemNotFound itemNotFound) {
return null;
}
return job;
}
});
} catch (Exception e) {
return Response.status(500).build();
}
if (job == null)
return Response.status(404).build();
getResourceManager().retrieveJobStatus(job);
return Response.ok().build();
}
@GET
@Path("{jobId}/results/{fileName}")
@Produces(MediaType.APPLICATION_JSON)
public Response jobExitCode(@Context HttpHeaders headers,
@Context UriInfo ui,
@PathParam("jobId") String jobId,
@PathParam("fileName") String fileName,
@QueryParam("page") Long page) {
PigJob job = null;
try {
job = getResourceManager().read(jobId);
} catch (ItemNotFound itemNotFound) {
return Response.ok("No such job").status(404).build();
}
try {
String filePath = job.getStatusDir() + "/" + fileName;
LOG.debug("Reading file " + filePath);
FilePaginator paginator = new FilePaginator(filePath, context);
if (page == null)
page = 0L;
FileResource file = new FileResource();
file.setFilePath(filePath);
file.setFileContent(paginator.readPage(page));
file.setHasNext(paginator.pageCount() > page + 1);
file.setPage(page);
file.setPageCount(paginator.pageCount());
JSONObject object = new JSONObject();
object.put("file", file);
return Response.ok(object).status(200).build();
} catch (IOException e) {
return Response.ok(e.getMessage()).status(404).build();
} catch (InterruptedException e) {
return Response.ok(e.getMessage()).status(404).build();
}
}
/**
* Get all jobs
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getJobList(@Context HttpHeaders headers, @Context UriInfo ui) {
List allJobs = getResourceManager().readAll(
new OnlyOwnersFilteringStrategy(this.context.getUsername()));
JSONObject object = new JSONObject();
object.put("jobs", allJobs);
return Response.ok(object).build();
}
/**
* Create job
*/
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public Response runJob(PigJobRequest request, @Context HttpServletResponse response,
@Context UriInfo ui) {
if (!request.validatePOST()) {
return badRequestResponse(request.explainPOST());
}
try {
getResourceManager().create(request.job);
} catch (IllegalArgumentException e) {
return badRequestResponse(e.getMessage());
} catch (WebServiceException e) {
return serverErrorResponse(e.getMessage());
}
PigJob job = null;
try {
job = getResourceManager().read(request.job.getId());
} catch (ItemNotFound itemNotFound) {
return Response.status(404).build();
}
response.setHeader("Location",
String.format("%s/%s", ui.getAbsolutePath().toString(), request.job.getId()));
JSONObject object = new JSONObject();
object.put("job", job);
return Response.ok(object).status(201).build();
}
/**
* Wrapper object for json mapping
*/
public static class PigJobRequest {
public PigJob job;
public String explainPOST() {
StringBuilder result = new StringBuilder();
if ((job.getPigScript() == null || job.getPigScript().isEmpty()) &&
(job.getForcedContent() == null || job.getForcedContent().isEmpty()))
result.append("No pigScript file or forcedContent specifed;");
if (job.getTitle() == null || job.getTitle().isEmpty())
result.append("No title specifed;");
if (job.getId() != null && !job.getTitle().isEmpty())
result.append("ID should not exists in creation request;");
return result.toString();
}
public boolean validatePOST() {
return explainPOST().isEmpty();
}
}
}