| 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.Arrays; |
| |
| import org.apache.helix.HelixException; |
| import org.apache.helix.PropertyKey; |
| import org.apache.helix.PropertyKey.Builder; |
| import org.apache.helix.zookeeper.impl.client.ZkClient; |
| 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 InstanceResource extends ServerResource { |
| private final static Logger LOG = LoggerFactory.getLogger(InstanceResource.class); |
| |
| public InstanceResource() { |
| getVariants().add(new Variant(MediaType.TEXT_PLAIN)); |
| getVariants().add(new Variant(MediaType.APPLICATION_JSON)); |
| setNegotiated(false); |
| } |
| |
| @Override |
| public Representation get() { |
| StringRepresentation presentation = null; |
| try { |
| presentation = getInstanceRepresentation(); |
| } catch (Exception e) { |
| String error = ClusterRepresentationUtil.getErrorAsJsonStringFromException(e); |
| presentation = new StringRepresentation(error, MediaType.APPLICATION_JSON); |
| |
| LOG.error("Exception in get instance", e); |
| } |
| return presentation; |
| } |
| |
| StringRepresentation getInstanceRepresentation() throws JsonGenerationException, |
| JsonMappingException, IOException { |
| String clusterName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| String instanceName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.INSTANCE_NAME); |
| Builder keyBuilder = new PropertyKey.Builder(clusterName); |
| ZkClient zkclient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.RAW_ZKCLIENT); |
| |
| String instanceCfgStr = |
| ResourceUtil.readZkAsBytes(zkclient, keyBuilder.instanceConfig(instanceName)); |
| StringRepresentation representation = |
| new StringRepresentation(instanceCfgStr, MediaType.APPLICATION_JSON); |
| |
| return representation; |
| } |
| |
| @Override |
| public Representation post(Representation entity) { |
| try { |
| String clusterName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| String instanceName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.INSTANCE_NAME); |
| |
| ZkClient zkclient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkclient); |
| |
| JsonParameters jsonParameters = new JsonParameters(entity); |
| String command = jsonParameters.getCommand(); |
| if (command.equalsIgnoreCase(ClusterSetup.enableInstance)) { |
| jsonParameters.verifyCommand(ClusterSetup.enableInstance); |
| |
| boolean enabled = Boolean.parseBoolean(jsonParameters.getParameter(JsonParameters.ENABLED)); |
| |
| setupTool.getClusterManagementTool().enableInstance(clusterName, instanceName, enabled); |
| } else if (command.equalsIgnoreCase(ClusterSetup.enablePartition)) { |
| jsonParameters.verifyCommand(ClusterSetup.enablePartition); |
| |
| boolean enabled = Boolean.parseBoolean(jsonParameters.getParameter(JsonParameters.ENABLED)); |
| |
| String[] partitions = jsonParameters.getParameter(JsonParameters.PARTITION).split(";"); |
| String resource = jsonParameters.getParameter(JsonParameters.RESOURCE); |
| |
| setupTool.getClusterManagementTool().enablePartition(enabled, clusterName, instanceName, |
| resource, Arrays.asList(partitions)); |
| } else if (command.equalsIgnoreCase(ClusterSetup.resetPartition)) { |
| jsonParameters.verifyCommand(ClusterSetup.resetPartition); |
| |
| String resource = jsonParameters.getParameter(JsonParameters.RESOURCE); |
| |
| String[] partitionNames = |
| jsonParameters.getParameter(JsonParameters.PARTITION).split("\\s+"); |
| setupTool.getClusterManagementTool().resetPartition(clusterName, instanceName, resource, |
| Arrays.asList(partitionNames)); |
| } else if (command.equalsIgnoreCase(ClusterSetup.resetInstance)) { |
| jsonParameters.verifyCommand(ClusterSetup.resetInstance); |
| |
| setupTool.getClusterManagementTool() |
| .resetInstance(clusterName, Arrays.asList(instanceName)); |
| } else if (command.equalsIgnoreCase(ClusterSetup.addInstanceTag)) { |
| jsonParameters.verifyCommand(ClusterSetup.addInstanceTag); |
| String tag = jsonParameters.getParameter(ClusterSetup.instanceGroupTag); |
| setupTool.getClusterManagementTool().addInstanceTag(clusterName, instanceName, tag); |
| } else if (command.equalsIgnoreCase(ClusterSetup.removeInstanceTag)) { |
| jsonParameters.verifyCommand(ClusterSetup.removeInstanceTag); |
| String tag = jsonParameters.getParameter(ClusterSetup.instanceGroupTag); |
| setupTool.getClusterManagementTool().removeInstanceTag(clusterName, instanceName, tag); |
| } else { |
| throw new HelixException("Unsupported command: " + command + ". Should be one of [" |
| + ClusterSetup.enableInstance + ", " + ClusterSetup.enablePartition + ", " |
| + ClusterSetup.resetInstance + "]"); |
| } |
| |
| getResponse().setEntity(getInstanceRepresentation()); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| } catch (Exception e) { |
| getResponse().setEntity(ClusterRepresentationUtil.getErrorAsJsonStringFromException(e), |
| MediaType.APPLICATION_JSON); |
| getResponse().setStatus(Status.SUCCESS_OK); |
| LOG.error("Exception in post instance", e); |
| } |
| return null; |
| } |
| |
| @Override |
| public Representation delete() { |
| try { |
| String clusterName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.CLUSTER_NAME); |
| String instanceName = |
| ResourceUtil.getAttributeFromRequest(getRequest(), ResourceUtil.RequestKey.INSTANCE_NAME); |
| ZkClient zkclient = |
| ResourceUtil.getAttributeFromCtx(getContext(), ResourceUtil.ContextKey.ZKCLIENT); |
| ClusterSetup setupTool = new ClusterSetup(zkclient); |
| setupTool.dropInstanceFromCluster(clusterName, instanceName); |
| 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 delete instance", e); |
| } |
| return null; |
| } |
| } |