/*
* Copyright © 2015 Cask Data, Inc.
*
* Licensed 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 co.cask.cdap.gateway.handlers;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.config.Config;
import co.cask.cdap.config.ConfigExistsException;
import co.cask.cdap.config.ConfigNotFoundException;
import co.cask.cdap.config.DashboardStore;
import co.cask.http.AbstractHttpHandler;
import co.cask.http.HttpResponder;
import com.google.common.base.Charsets;
import com.google.common.collect.ImmutableMap;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonSyntaxException;
import com.google.inject.Inject;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.Map;
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;
/**
* Dashboard HTTP Handler.
*/
@Path(Constants.Gateway.API_VERSION_3 + "/namespaces/{namespace-id}/configuration/dashboards")
public class DashboardHttpHandler extends AbstractHttpHandler {
private static final Logger LOG = LoggerFactory.getLogger(DashboardHttpHandler.class);
private static final JsonParser JSON_PARSER = new JsonParser();
private static final String CONFIG_PROPERTY = "config";
private static final String ID = "id";
private final DashboardStore dashboardStore;
@Inject
public DashboardHttpHandler(DashboardStore dashboardStore) {
this.dashboardStore = dashboardStore;
}
@Path("/")
@POST
public void create(HttpRequest request, HttpResponder responder,
@PathParam("namespace-id") String namespace) throws Exception {
String data = request.getContent().toString(Charsets.UTF_8);
// Initialize with empty config if no data is sent during creation of the dashboard
if (data.equals("")) {
data = "{}";
}
if (!isValidJSON(data)) {
responder.sendJson(HttpResponseStatus.BAD_REQUEST, "Invalid JSON in body");
return;
}
//Dashboard Config has the following layout:
//Config ID = dashboardId (randomUUID)
//Config Properties = Map (Key = CONFIG_PROPERTY, value = Serialized JSON string of dashboard configuration)
Map<String, String> propMap = ImmutableMap.of(CONFIG_PROPERTY, data);
String dashboardId = "";
try {
dashboardId = dashboardStore.create(namespace, propMap);
Map<String, String> returnMap = ImmutableMap.of(ID, dashboardId);
responder.sendJson(HttpResponseStatus.OK, returnMap);
} catch (ConfigExistsException e) {
responder.sendJson(HttpResponseStatus.BAD_REQUEST, String.format("Dashboard %s already exists", dashboardId));
}
}
@Path("/")
@GET
public void list(HttpRequest request, HttpResponder responder,
@PathParam("namespace-id") String namespace) throws Exception {
JsonArray jsonArray = new JsonArray();
List<Config> configList = dashboardStore.list(namespace);
for (Config config : configList) {
JsonObject jsonObject = new JsonObject();
jsonObject.addProperty(ID, config.getId());
jsonObject.add(CONFIG_PROPERTY, JSON_PARSER.parse(config.getProperties().get(CONFIG_PROPERTY)));
jsonArray.add(jsonObject);
}
responder.sendJson(HttpResponseStatus.OK, jsonArray);
}
@Path("/{dashboard-id}")
@DELETE
public void delete(HttpRequest request, HttpResponder responder,
@PathParam("namespace-id") String namespace,
@PathParam("dashboard-id") String id) throws Exception {
try {
dashboardStore.delete(namespace, id);
responder.sendStatus(HttpResponseStatus.OK);
} catch (ConfigNotFoundException e) {
responder.sendString(HttpResponseStatus.NOT_FOUND, "Dashboard not found");
}
}
@Path("/{dashboard-id}")
@GET
public void get(HttpRequest request, HttpResponder responder,
@PathParam("namespace-id") String namespace,
@PathParam("dashboard-id") String id) throws Exception {
try {
Config dashConfig = dashboardStore.get(namespace, id);
JsonObject jsonObject = new JsonObject();
jsonObject.addProperty(ID, id);
//Dashboard Config is stored in ConfigStore as serialized JSON string with CONFIG_PROPERTY key.
//When we send the data back, we send it as JSON object instead of sending the serialized string.
jsonObject.add(CONFIG_PROPERTY, JSON_PARSER.parse(dashConfig.getProperties().get(CONFIG_PROPERTY)));
responder.sendJson(HttpResponseStatus.OK, jsonObject);
} catch (ConfigNotFoundException e) {
responder.sendString(HttpResponseStatus.NOT_FOUND, "Dashboard not found");
}
}
@Path("/{dashboard-id}")
@PUT
public void set(HttpRequest request, HttpResponder responder,
@PathParam("namespace-id") String namespace,
@PathParam("dashboard-id") String id) throws Exception {
try {
String data = request.getContent().toString(Charsets.UTF_8);
if (!isValidJSON(data)) {
responder.sendJson(HttpResponseStatus.BAD_REQUEST, "Invalid JSON in body");
return;
}
Map<String, String> propMap = ImmutableMap.of(CONFIG_PROPERTY, data);
dashboardStore.put(namespace, new Config(id, propMap));
responder.sendStatus(HttpResponseStatus.OK);
} catch (ConfigNotFoundException e) {
responder.sendString(HttpResponseStatus.NOT_FOUND, "Dashboard not found");
}
}
private boolean isValidJSON(String json) {
try {
JSON_PARSER.parse(json);
} catch (JsonSyntaxException ex) {
return false;
}
return true;
}
}