| /* |
| * 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.hadoop.chukwa.datacollection.agent.rest; |
| |
| import org.apache.hadoop.chukwa.datacollection.agent.ChukwaAgent; |
| import org.apache.hadoop.chukwa.datacollection.adaptor.AdaptorException; |
| import org.apache.hadoop.chukwa.datacollection.adaptor.Adaptor; |
| import org.apache.hadoop.chukwa.datacollection.OffsetStatsManager; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import javax.ws.rs.Path; |
| import javax.ws.rs.GET; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.PathParam; |
| import javax.ws.rs.DELETE; |
| import javax.ws.rs.POST; |
| import javax.ws.rs.Consumes; |
| import javax.ws.rs.core.Response; |
| import javax.ws.rs.core.MediaType; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import java.text.DecimalFormat; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * JAX-RS controller to handle all HTTP request to the Agent that deal with adaptors. |
| */ |
| @Path("/adaptor") |
| public class AdaptorController { |
| |
| private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat(); |
| private static final Log LOG = LogFactory.getLog(AdaptorController.class); |
| |
| static { |
| DECIMAL_FORMAT.setMinimumFractionDigits(2); |
| DECIMAL_FORMAT.setMaximumFractionDigits(2); |
| DECIMAL_FORMAT.setGroupingUsed(false); |
| } |
| |
| /** |
| * Adds an adaptor to the agent and returns the adaptor info |
| * @param ac is adaptor configuration |
| * @return web status |
| * |
| * @request.representation.example {@link Examples#CREATE_ADAPTOR_SAMPLE} |
| * @response.representation.200.doc Adaptor has been registered |
| * @response.representation.200.mediaType application/json |
| * @response.representation.200.example {@link Examples#ADAPTOR_STATUS_SAMPLE} |
| * @response.representation.400.doc Error in register adaptor |
| * @response.representation.400.mediaType text/plain |
| * @response.representation.400.example Bad Request |
| */ |
| @POST |
| @Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML}) |
| @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, MediaType.TEXT_PLAIN}) |
| public Response addAdaptor(AdaptorConfig ac) { |
| ChukwaAgent agent = ChukwaAgent.getAgent(); |
| if (ac.getAdaptorClass() == null || |
| ac.getDataType() == null) { |
| return badRequestResponse("Bad adaptor config."); |
| } |
| |
| StringBuilder addCommand = new StringBuilder("add "); |
| addCommand.append(ac.getAdaptorClass()).append(' '); |
| addCommand.append(ac.getDataType()); |
| if (ac.getAdaptorParams() != null) |
| addCommand.append(' ').append(ac.getAdaptorParams()); |
| addCommand.append(' ').append(ac.getOffset()); |
| |
| // add the adaptor |
| try { |
| String adaptorId = agent.processAddCommandE(addCommand.toString()); |
| return doGetAdaptor(adaptorId); |
| } catch (AdaptorException e) { |
| LOG.warn("Could not add adaptor for data type: '" + ac.getDataType() + |
| "', error: " + e.getMessage()); |
| return badRequestResponse("Could not add adaptor for data type: '" + ac.getDataType() + |
| "', error: " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Remove an adaptor from the agent |
| * |
| * @param adaptorId id of adaptor to remove. |
| * @return web status |
| * @response.representation.200.doc Delete adaptor by id |
| * @response.representation.200.mediaType text/plain |
| */ |
| @DELETE |
| @Path("/{adaptorId}") |
| @Produces({MediaType.TEXT_PLAIN}) |
| public Response removeAdaptor(@PathParam("adaptorId") String adaptorId) { |
| ChukwaAgent agent = ChukwaAgent.getAgent(); |
| |
| // validate that we have an adaptorId |
| if (adaptorId == null) { |
| return badRequestResponse("Missing adaptorId."); |
| } |
| |
| // validate that we have a valid adaptorId |
| if (agent.getAdaptor(adaptorId) == null) { |
| return badRequestResponse("Invalid adaptorId: " + adaptorId); |
| } |
| |
| // stop the agent |
| agent.stopAdaptor(adaptorId, true); |
| return Response.ok().build(); |
| } |
| |
| /** |
| * Get all adaptors |
| * @return web status |
| * |
| * @response.representation.200.doc List all configured adaptors |
| * @response.representation.200.mediaType application/json |
| * @response.representation.200.example {@link Examples#ADAPTOR_LIST_SAMPLE} |
| */ |
| @GET |
| @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML}) |
| public Response getAdaptors() { |
| return doGetAdaptors(); |
| } |
| |
| /** |
| * Get a single adaptor |
| * |
| * @param adaptorId id of the adaptor to return |
| * @return web status |
| * @response.representation.200.doc Adaptor status and data transfer rate in 1, 5, 10 minutes averages |
| * @response.representation.200.mediaType application/json |
| * @response.representation.200.example {@link Examples#ADAPTOR_STATUS_SAMPLE} |
| */ |
| @GET |
| @Path("/{adaptorId}") |
| @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML}) |
| public Response getAdaptor(@PathParam("adaptorId") String adaptorId) { |
| return doGetAdaptor(adaptorId); |
| } |
| |
| /** |
| * Handles a single adaptor request for rendering data model output. |
| * |
| * @return Response object |
| */ |
| private Response doGetAdaptor(String adaptorId) { |
| return Response.ok(buildAdaptor(adaptorId)).build(); |
| } |
| |
| /** |
| * Rendering data model output for all adaptors |
| * |
| * @return Response object |
| */ |
| private Response doGetAdaptors() { |
| return Response.ok(buildAdaptors()).build(); |
| } |
| |
| /** |
| * Renders info for one adaptor. |
| */ |
| protected AdaptorInfo buildAdaptor(String adaptorId) { |
| ChukwaAgent agent = ChukwaAgent.getAgent(); |
| Adaptor adaptor = agent.getAdaptor(adaptorId); |
| OffsetStatsManager<Adaptor> adaptorStats = agent.getAdaptorStatsManager(); |
| |
| AdaptorInfo info = new AdaptorInfo(); |
| info.setId(adaptorId); |
| info.setDataType(adaptor.getType()); |
| info.setAdaptorClass(adaptor.getClass().getName()); |
| String[] status = adaptor.getCurrentStatus().split(" ",2); |
| info.setAdaptorParams(status[1]); |
| List<AdaptorAveragedRate> rates = new ArrayList<AdaptorAveragedRate>(); |
| rates.add(new AdaptorAveragedRate(60, adaptorStats.calcAverageRate(adaptor, 60))); |
| rates.add(new AdaptorAveragedRate(300, adaptorStats.calcAverageRate(adaptor, 300))); |
| rates.add(new AdaptorAveragedRate(600, adaptorStats.calcAverageRate(adaptor, 600))); |
| info.setAdaptorRates(rates); |
| return info; |
| } |
| |
| /** |
| * Renders info for all adaptors. |
| */ |
| protected AdaptorList buildAdaptors() { |
| ChukwaAgent agent = ChukwaAgent.getAgent(); |
| Map<String, String> adaptorMap = agent.getAdaptorList(); |
| AdaptorList list = new AdaptorList(); |
| for(String name : adaptorMap.keySet()) { |
| Adaptor adaptor = agent.getAdaptor(name); |
| OffsetStatsManager<Adaptor> adaptorStats = agent.getAdaptorStatsManager(); |
| |
| AdaptorInfo info = new AdaptorInfo(); |
| info.setId(name); |
| info.setDataType(adaptor.getType()); |
| info.setAdaptorClass(adaptor.getClass().getName()); |
| String[] status = adaptor.getCurrentStatus().split(" ",2); |
| info.setAdaptorParams(status[1]); |
| List<AdaptorAveragedRate> rates = new ArrayList<AdaptorAveragedRate>(); |
| rates.add(new AdaptorAveragedRate(60, adaptorStats.calcAverageRate(adaptor, 60))); |
| rates.add(new AdaptorAveragedRate(300, adaptorStats.calcAverageRate(adaptor, 300))); |
| rates.add(new AdaptorAveragedRate(600, adaptorStats.calcAverageRate(adaptor, 600))); |
| info.setAdaptorRates(rates); |
| list.add(info); |
| } |
| return list; |
| } |
| |
| /** |
| * Renders bad request response. |
| */ |
| private static Response badRequestResponse(String content) { |
| return Response.status(HttpServletResponse.SC_BAD_REQUEST) |
| .entity(content).build(); |
| } |
| |
| } |