/**
* 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.slider.rest;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.UriInfo;
import org.apache.ambari.view.ViewResourceHandler;
import org.apache.ambari.view.slider.SliderAppsViewController;
import org.apache.hadoop.yarn.exceptions.YarnException;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SliderAppsResource {
private static final Logger logger = LoggerFactory
.getLogger(SliderAppsResource.class);
@Inject
ViewResourceHandler resourceHandler;
@Inject
SliderAppsViewController sliderAppsViewController;
@GET
@Produces({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
public Response getApps(@Context HttpHeaders headers, @Context UriInfo uri) {
MultivaluedMap<String, String> queryParameters = uri.getQueryParameters();
if (queryParameters != null && queryParameters.containsKey("validateAppName")) {
List<String> appNames = queryParameters.get("validateAppName");
if (appNames.size() > 0) {
try {
if (sliderAppsViewController.appExists(appNames.get(0))) {
return Response.status(Status.CONFLICT).build();
}
} catch (IOException e) {
logger.warn("Unable to validate cluster name", e);
} catch (InterruptedException e) {
logger.warn("Unable to validate cluster name", e);
} catch (YarnException e) {
logger.warn("Unable to validate cluster name", e);
}
return Response.ok().build();
}
}
return resourceHandler.handleRequest(headers, uri, null);
}
@GET
@Path("{appId}")
@Produces({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
public Response getApp(@Context HttpHeaders headers, @Context UriInfo uri,
@PathParam("appId") String appId) {
return resourceHandler.handleRequest(headers, uri, appId);
}
@DELETE
@Path("{appId}")
public void deleteApp(@Context HttpHeaders headers, @Context UriInfo uri,
@PathParam("appId") String appId) throws YarnException, IOException, InterruptedException {
sliderAppsViewController.deleteSliderApp(appId);
}
@PUT
@Path("{appId}")
@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
public Response updateApp(@Context UriInfo uri, String jsonString,
@PathParam("appId") String appId) throws IOException, YarnException,
InterruptedException, URISyntaxException {
if (jsonString != null) {
JsonElement requestContent = new JsonParser().parse(jsonString);
if (requestContent != null && appId != null) {
JsonObject requestJson = requestContent.getAsJsonObject();
if (requestJson.has("state")) {
String newState = requestJson.get("state").getAsString();
if ("FROZEN".equals(newState)) {
sliderAppsViewController.freezeApp(appId);
return Response.ok().build();
} else if ("RUNNING".equals(newState)) {
sliderAppsViewController.thawApp(appId);
return Response.ok().build();
}
} else if (requestJson.has("components")) {
Map<String, Integer> componentsMap = new HashMap<String, Integer>();
JsonObject componentsJson = requestJson.get("components")
.getAsJsonObject();
for (Entry<String, JsonElement> e : componentsJson.entrySet()) {
String componentName = e.getKey();
int instanceCount = e.getValue().getAsJsonObject()
.get("instanceCount").getAsInt();
componentsMap.put(componentName, instanceCount);
}
sliderAppsViewController.flexApp(appId, componentsMap);
return Response.ok().build();
}
}
String sliderApp = sliderAppsViewController
.createSliderApp(requestContent.getAsJsonObject());
if (sliderApp != null)
return Response.created(new URI(uri.getAbsolutePath() + sliderApp))
.build();
}
logger.warn("No request content sent to create app");
return Response.status(Response.Status.BAD_REQUEST).build();
}
@POST
@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
public Response createApp(@Context UriInfo uri, String jsonString)
throws IOException, YarnException, InterruptedException,
URISyntaxException {
if (jsonString != null) {
JsonElement requestContent = new JsonParser().parse(jsonString);
String sliderApp = sliderAppsViewController
.createSliderApp(requestContent.getAsJsonObject());
if (sliderApp != null)
return Response.created(new URI(uri.getAbsolutePath() + sliderApp))
.build();
}
logger.warn("No request content sent to create app");
return Response.status(Response.Status.BAD_REQUEST).build();
}
}