| 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.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.helix.HelixAdmin; |
| import org.apache.helix.HelixException; |
| import org.apache.helix.zookeeper.datamodel.ZNRecord; |
| import org.apache.helix.zookeeper.impl.client.ZkClient; |
| import org.apache.helix.model.HelixConfigScope; |
| import org.apache.helix.model.HelixConfigScope.ConfigScopeProperty; |
| import org.apache.helix.model.builder.HelixConfigScopeBuilder; |
| import org.apache.helix.tools.ClusterSetup; |
| 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; |
| |
| /** |
| * Class for server-side resource at <code> "/clusters/{clusterName}/configs" |
| * <p> |
| * <li>GET get scoped configs |
| * <li>POST set/remove scoped configs |
| */ |
| public class ConfigResource extends ServerResource { |
| private final static Logger LOG = LoggerFactory.getLogger(ConfigResource.class); |
| |
| public ConfigResource() { |
| getVariants().add(new Variant(MediaType.TEXT_PLAIN)); |
| getVariants().add(new Variant(MediaType.APPLICATION_JSON)); |
| setNegotiated(false); |
| } |
| |
| String getValue(String key) { |
| return (String) getRequest().getAttributes().get(key); |
| } |
| |
| static StringRepresentation getConfigScopes() throws Exception { |
| StringRepresentation representation = null; |
| ZNRecord record = new ZNRecord("Config"); |
| |
| List<String> scopeList = |
| Arrays.asList(ConfigScopeProperty.CLUSTER.toString(), |
| ConfigScopeProperty.RESOURCE.toString(), ConfigScopeProperty.PARTICIPANT.toString(), |
| ConfigScopeProperty.PARTITION.toString()); |
| record.setListField("scopes", scopeList); |
| |
| representation = |
| new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(record), |
| MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| StringRepresentation getConfigKeys(ConfigScopeProperty scopeProperty, String... keys) |
| throws Exception { |
| StringRepresentation representation = null; |
| |
| ZkClient zkClient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkClient); |
| HelixAdmin admin = setupTool.getClusterManagementTool(); |
| ZNRecord record = new ZNRecord(scopeProperty + " Config"); |
| |
| HelixConfigScope scope = new HelixConfigScopeBuilder(scopeProperty, keys).build(); |
| List<String> configKeys = admin.getConfigKeys(scope); |
| record.setListField(scopeProperty.toString(), configKeys); |
| |
| representation = |
| new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(record), |
| MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| StringRepresentation getConfigs(ConfigScopeProperty scopeProperty, String... keys) |
| throws Exception { |
| StringRepresentation representation = null; |
| |
| ZkClient zkClient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkClient); |
| HelixAdmin admin = setupTool.getClusterManagementTool(); |
| ZNRecord record = new ZNRecord(scopeProperty + " Config"); |
| |
| HelixConfigScope scope = new HelixConfigScopeBuilder(scopeProperty, keys).build(); |
| List<String> configKeys = admin.getConfigKeys(scope); |
| Map<String, String> configs = admin.getConfig(scope, configKeys); |
| record.setSimpleFields(configs); |
| |
| representation = |
| new StringRepresentation(ClusterRepresentationUtil.ZNRecordToJson(record), |
| MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| /** |
| * Get scoped configs |
| * <p> |
| * Usage: |
| * <p> |
| * <li>Get cluster-level configs: |
| * <code>curl http://{host:port}/clusters/{clusterName}/configs/cluster |
| * <li>Get instance-level configs: |
| * <code>curl http://{host:port}/clusters/{clusterName}/configs/participant/{instanceName} |
| * <li>Get resource-level configs: |
| * <code>curl http://{host:port}/clusters/{clusterName}/configs/resource/{resourceName} |
| */ |
| @Override |
| public Representation get() { |
| StringRepresentation representation = null; |
| |
| String clusterName = getValue("clusterName"); |
| String scopeStr = getValue("scope"); |
| try { |
| if (scopeStr == null) { |
| // path is "/clusters/{clusterName}/configs" |
| return getConfigScopes(); |
| } |
| |
| scopeStr = scopeStr.toUpperCase(); |
| |
| ConfigScopeProperty scopeProperty = ConfigScopeProperty.valueOf(scopeStr); |
| switch (scopeProperty) { |
| case CLUSTER: |
| case PARTICIPANT: |
| case RESOURCE: |
| String scopeKey1 = getValue("scopeKey1"); |
| if (scopeKey1 == null) { |
| // path is "/clusters/{clusterName}/configs/cluster|participant|resource" |
| representation = getConfigKeys(scopeProperty, clusterName); |
| } else { |
| // path is "/clusters/{clusterName}/configs/cluster|participant|resource/ |
| // {clusterName}|{participantName}|{resourceName}" |
| representation = getConfigs(scopeProperty, clusterName, scopeKey1); |
| } |
| break; |
| case PARTITION: |
| scopeKey1 = getValue("scopeKey1"); |
| String scopeKey2 = getValue("scopeKey2"); |
| if (scopeKey1 == null) { |
| // path is "/clusters/{clusterName}/configs/partition" |
| throw new HelixException("Missing resourceName"); |
| } else if (scopeKey2 == null) { |
| // path is "/clusters/{clusterName}/configs/partition/resourceName" |
| representation = getConfigKeys(scopeProperty, clusterName, scopeKey1); |
| } else { |
| // path is |
| // "/clusters/{clusterName}/configs/partition/resourceName/partitionName" |
| representation = getConfigs(scopeProperty, clusterName, scopeKey1, scopeKey2); |
| } |
| break; |
| default: |
| break; |
| } |
| } catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| representation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| LOG.error("", e); |
| } |
| |
| return representation; |
| } |
| |
| /** |
| * set or remove configs depends on "command" field of jsonParameters in POST body |
| * @param entity |
| * @param scopeStr |
| * @throws Exception |
| */ |
| void setConfigs(Representation entity, ConfigScopeProperty type, String scopeArgs) |
| throws Exception { |
| JsonParameters jsonParameters = new JsonParameters(entity); |
| String command = jsonParameters.getCommand(); |
| |
| ZkClient zkClient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkClient); |
| if (command.equalsIgnoreCase(ClusterSetup.setConfig)) { |
| jsonParameters.verifyCommand(ClusterSetup.setConfig); |
| String propertiesStr = jsonParameters.getParameter(JsonParameters.CONFIGS); |
| |
| setupTool.setConfig(type, scopeArgs, propertiesStr); |
| } else if (command.equalsIgnoreCase(ClusterSetup.removeConfig)) { |
| jsonParameters.verifyCommand(ClusterSetup.removeConfig); |
| String propertiesStr = jsonParameters.getParameter(JsonParameters.CONFIGS); |
| |
| setupTool.removeConfig(type, scopeArgs, propertiesStr); |
| } else { |
| throw new HelixException("Unsupported command: " + command + ". Should be one of [" |
| + ClusterSetup.setConfig + ", " + ClusterSetup.removeConfig + "]"); |
| |
| } |
| |
| getResponse().setEntity(get()); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| } |
| |
| /** |
| * Set/remove scoped configs |
| * <p> |
| * Usage: |
| * <p> |
| * <li>Set cluster level configs: |
| * <code>curl -d 'jsonParameters={"command":"setConfig","configs":"{key1=value1,key2=value2}"}' |
| * -H "Content-Type: application/json" http://{host:port}/clusters/{clusterName}/configs/cluster |
| * <li>Remove cluster level configs: |
| * <code>curl -d 'jsonParameters={"command":"removeConfig","configs":"{key1,key2}"}' |
| * -H "Content-Type: application/json" http://{host:port}/clusters/{clusterName}/configs/cluster |
| * <li>Set instance level configs: |
| * <code>curl -d 'jsonParameters={"command":"setConfig","configs":"{key1=value1,key2=value2}"}' |
| * -H "Content-Type: application/json" http://{host:port}/clusters/{clusterName}/configs/participant/{instanceName} |
| * <li>Remove instance level configs: |
| * <code>curl -d 'jsonParameters={"command":"removeConfig","configs":"{key1,key2}"}' |
| * -H "Content-Type: application/json" http://{host:port}/clusters/{clusterName}/configs/participant/{instanceName} |
| * <li>Set resource level configs: |
| * <code>curl -d 'jsonParameters={"command":"setConfig","configs":"{key1=value1,key2=value2}"}' |
| * -H "Content-Type: application/json" http://{host:port}/clusters/{clusterName}/configs/resource/{resourceName} |
| * <li>Remove resource level configs: |
| * <code>curl -d 'jsonParameters={"command":"removeConfig","configs":"{key1,key2}"}' |
| * -H "Content-Type: application/json" http://{host:port}/clusters/{clusterName}/configs/resource/{resourceName} |
| */ |
| @Override |
| public Representation post(Representation entity) { |
| String clusterName = getValue("clusterName"); |
| |
| String scopeStr = getValue("scope").toUpperCase(); |
| try { |
| ConfigScopeProperty scopeProperty = ConfigScopeProperty.valueOf(scopeStr); |
| |
| switch (scopeProperty) { |
| case CLUSTER: |
| String scopeArgs = clusterName; |
| setConfigs(entity, scopeProperty, scopeArgs); |
| break; |
| case PARTICIPANT: |
| case RESOURCE: |
| String scopeKey1 = getValue("scopeKey1"); |
| |
| if (scopeKey1 == null) { |
| throw new HelixException("Missing resourceName|participantName"); |
| } else { |
| scopeArgs = clusterName + "," + scopeKey1; |
| setConfigs(entity, scopeProperty, scopeArgs); |
| } |
| break; |
| case PARTITION: |
| scopeKey1 = getValue("scopeKey1"); |
| String scopeKey2 = getValue("scopeKey2"); |
| if (scopeKey1 == null || scopeKey2 == null) { |
| throw new HelixException("Missing resourceName|partitionName"); |
| } else { |
| scopeArgs = clusterName + "," + scopeKey1 + "," + scopeKey2; |
| setConfigs(entity, scopeProperty, scopeArgs); |
| } |
| break; |
| default: |
| break; |
| } |
| } catch (Exception e) { |
| LOG.error("Error in posting " + entity, e); |
| getResponse().setEntity(ClusterRepresentationUtil.getErrorAsJsonStringFromException(e), |
| MediaType.APPLICATION_JSON); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| } |
| return null; |
| } |
| } |