| package org.apache.helix.webapp.resources; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| import org.apache.helix.HelixException; |
| import org.apache.helix.PropertyKey; |
| import org.apache.helix.zookeeper.datamodel.ZNRecord; |
| import org.apache.helix.zookeeper.impl.client.ZkClient; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.IdealState.RebalanceMode; |
| import org.apache.helix.tools.ClusterSetup; |
| import org.codehaus.jackson.JsonGenerationException; |
| import org.codehaus.jackson.map.JsonMappingException; |
| import org.restlet.data.MediaType; |
| import org.restlet.data.Status; |
| import org.restlet.representation.Representation; |
| import org.restlet.representation.StringRepresentation; |
| import org.restlet.representation.Variant; |
| import org.restlet.resource.ServerResource; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class ResourceGroupsResource extends ServerResource { |
| private final static Logger LOG = LoggerFactory.getLogger(ResourceGroupsResource.class); |
| |
| public ResourceGroupsResource() { |
| getVariants().add(new Variant(MediaType.TEXT_PLAIN)); |
| getVariants().add(new Variant(MediaType.APPLICATION_JSON)); |
| setNegotiated(false); |
| } |
| |
| @Override |
| public Representation get() { |
| StringRepresentation presentation = null; |
| try { |
| String clusterName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| presentation = getHostedEntitiesRepresentation(clusterName); |
| } |
| |
| catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| presentation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| |
| LOG.error("Exception in get resourceGroups", e); |
| } |
| return presentation; |
| } |
| |
| StringRepresentation getHostedEntitiesRepresentation(String clusterName) |
| throws JsonGenerationException, JsonMappingException, IOException { |
| // Get all resources |
| ZkClient zkclient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.RAW_ZKCLIENT); |
| PropertyKey.Builder keyBuilder = new PropertyKey.Builder(clusterName); |
| Map<String, String> idealStateMap = |
| ResourceUtil.readZkChildrenAsBytesMap(zkclient, keyBuilder.idealStates()); |
| |
| // Create the result |
| ZNRecord hostedEntitiesRecord = new ZNRecord("ResourceGroups"); |
| |
| // Figure out which tags are present on which resources |
| Map<String, String> tagMap = Maps.newHashMap(); |
| for (String resourceName : idealStateMap.keySet()) { |
| String idealStateStr = idealStateMap.get(resourceName); |
| String tag = |
| ResourceUtil.extractSimpleFieldFromZNRecord(idealStateStr, |
| IdealState.IdealStateProperty.INSTANCE_GROUP_TAG.toString()); |
| if (tag != null) { |
| tagMap.put(resourceName, tag); |
| } |
| } |
| |
| // Populate the result |
| List<String> allResources = Lists.newArrayList(idealStateMap.keySet()); |
| hostedEntitiesRecord.setListField("ResourceGroups", allResources); |
| if (!tagMap.isEmpty()) { |
| hostedEntitiesRecord.setMapField("ResourceTags", tagMap); |
| } |
| |
| StringRepresentation representation = |
| new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(hostedEntitiesRecord), |
| MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| @Override |
| public Representation post(Representation entity) { |
| try { |
| String clusterName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| |
| JsonParameters jsonParameters = new JsonParameters(entity); |
| String command = jsonParameters.getCommand(); |
| |
| if (command.equalsIgnoreCase(ClusterSetup.addResource) |
| || JsonParameters.CLUSTERSETUP_COMMAND_ALIASES.get(ClusterSetup.addResource).contains( |
| command)) { |
| jsonParameters.verifyCommand(ClusterSetup.addResource); |
| |
| String entityName = jsonParameters.getParameter(JsonParameters.RESOURCE_GROUP_NAME); |
| String stateModelDefRef = jsonParameters.getParameter(JsonParameters.STATE_MODEL_DEF_REF); |
| int partitions = Integer.parseInt(jsonParameters.getParameter(JsonParameters.PARTITIONS)); |
| String mode = RebalanceMode.SEMI_AUTO.toString(); |
| if (jsonParameters.getParameter(JsonParameters.IDEAL_STATE_MODE) != null) { |
| mode = jsonParameters.getParameter(JsonParameters.IDEAL_STATE_MODE); |
| } |
| |
| int bucketSize = 0; |
| if (jsonParameters.getParameter(JsonParameters.BUCKET_SIZE) != null) { |
| try { |
| bucketSize = Integer.parseInt(jsonParameters.getParameter(JsonParameters.BUCKET_SIZE)); |
| } catch (Exception e) { |
| |
| } |
| } |
| |
| int maxPartitionsPerNode = -1; |
| if (jsonParameters.getParameter(JsonParameters.MAX_PARTITIONS_PER_NODE) != null) { |
| try { |
| maxPartitionsPerNode = |
| Integer.parseInt(jsonParameters |
| .getParameter(JsonParameters.MAX_PARTITIONS_PER_NODE)); |
| } catch (Exception e) { |
| |
| } |
| } |
| |
| ZkClient zkClient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkClient); |
| setupTool.addResourceToCluster(clusterName, entityName, partitions, stateModelDefRef, mode, |
| bucketSize, maxPartitionsPerNode); |
| } else { |
| throw new HelixException("Unsupported command: " + command + ". Should be one of [" |
| + ClusterSetup.addResource + "]"); |
| |
| } |
| |
| getResponse().setEntity(getHostedEntitiesRepresentation(clusterName)); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| } |
| |
| catch (Exception e) { |
| getResponse().setEntity(ClusterRepresentationUtil.getErrorAsJsonStringFromException(e), |
| MediaType.APPLICATION_JSON); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| LOG.error("Error in posting " + entity, e); |
| } |
| return null; |
| } |
| } |