Java tutorial
/* * 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. TcSee the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.stratos.autoscaler.client.cloud.controller; import org.apache.axis2.transport.http.HTTPConstants; import org.apache.commons.configuration.XMLConfiguration; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.stratos.autoscaler.Constants; import org.apache.stratos.autoscaler.deployment.policy.DeploymentPolicy; import org.apache.stratos.autoscaler.exception.PartitionValidationException; import org.apache.stratos.autoscaler.exception.SpawningException; import org.apache.stratos.autoscaler.exception.TerminationException; import org.apache.stratos.autoscaler.util.ConfUtil; import org.apache.stratos.cloud.controller.stub.*; import org.apache.stratos.cloud.controller.stub.deployment.partition.Partition; import org.apache.stratos.cloud.controller.stub.pojo.MemberContext; import org.apache.stratos.cloud.controller.stub.pojo.Properties; import org.apache.stratos.cloud.controller.stub.pojo.Property; import org.apache.stratos.messaging.domain.topology.Topology; import org.apache.stratos.messaging.message.receiver.topology.TopologyManager; import java.rmi.RemoteException; /** * This class will call cloud controller web service to take the action decided by Autoscaler */ public class CloudControllerClient { private static final Log log = LogFactory.getLog(CloudControllerClient.class); private static CloudControllerServiceStub stub; /* An instance of a CloudControllerClient is created when the class is loaded. * Since the class is loaded only once, it is guaranteed that an object of * CloudControllerClient is created only once. Hence it is singleton. */ private static class InstanceHolder { private static final CloudControllerClient INSTANCE = new CloudControllerClient(); } public static CloudControllerClient getInstance() { return InstanceHolder.INSTANCE; } private CloudControllerClient() { try { XMLConfiguration conf = ConfUtil.getInstance(null).getConfiguration(); int port = conf.getInt("autoscaler.cloudController.port", Constants.CLOUD_CONTROLLER_DEFAULT_PORT); String hostname = conf.getString("autoscaler.cloudController.hostname", "localhost"); String epr = "https://" + hostname + ":" + port + "/" + Constants.CLOUD_CONTROLLER_SERVICE_SFX; int cloudControllerClientTimeout = conf.getInt("autoscaler.cloudController.clientTimeout", 180000); stub = new CloudControllerServiceStub(epr); stub._getServiceClient().getOptions().setProperty(HTTPConstants.SO_TIMEOUT, cloudControllerClientTimeout); stub._getServiceClient().getOptions().setProperty(HTTPConstants.CONNECTION_TIMEOUT, cloudControllerClientTimeout); } catch (Exception e) { log.error("Stub init error", e); } } /* * This will validate the given partitions against the given cartridge type. */ public synchronized boolean validateDeploymentPolicy(String cartridgeType, DeploymentPolicy deploymentPolicy) throws PartitionValidationException { try { if (log.isInfoEnabled()) { log.info(String.format("Validating partitions of policy via cloud controller: [id] %s", deploymentPolicy.getId())); } long startTime = System.currentTimeMillis(); boolean result = stub.validateDeploymentPolicy(cartridgeType, deploymentPolicy.getAllPartitions()); if (log.isDebugEnabled()) { long endTime = System.currentTimeMillis(); log.debug(String.format("Service call validateDeploymentPolicy() returned in %dms", (endTime - startTime))); } return result; } catch (RemoteException e) { log.error(e.getMessage(), e); throw new PartitionValidationException(e.getMessage(), e); } catch (CloudControllerServiceInvalidPartitionExceptionException e) { log.error(e.getFaultMessage().getInvalidPartitionException().getMessage(), e); throw new PartitionValidationException(e.getFaultMessage().getInvalidPartitionException().getMessage()); } catch (CloudControllerServiceInvalidCartridgeTypeExceptionException e) { log.error(e.getFaultMessage().getInvalidCartridgeTypeException().getMessage(), e); throw new PartitionValidationException( e.getFaultMessage().getInvalidCartridgeTypeException().getMessage()); } } /* * Calls the CC to validate the partition. */ public synchronized boolean validatePartition(Partition partition) throws PartitionValidationException { try { if (log.isInfoEnabled()) { log.info(String.format("Validating partition via cloud controller: [id] %s", partition.getId())); } long startTime = System.currentTimeMillis(); boolean result = stub.validatePartition(partition); if (log.isDebugEnabled()) { long endTime = System.currentTimeMillis(); log.debug( String.format("Service call validatePartition() returned in %dms", (endTime - startTime))); } return result; } catch (RemoteException e) { log.error(e.getMessage(), e); throw new PartitionValidationException(e.getMessage(), e); } catch (CloudControllerServiceInvalidPartitionExceptionException e) { log.error(e.getFaultMessage().getInvalidPartitionException().getMessage(), e); throw new PartitionValidationException(e.getFaultMessage().getInvalidPartitionException().getMessage(), e); } } public synchronized MemberContext spawnAnInstance(Partition partition, String clusterId, String lbClusterId, String networkPartitionId, boolean isPrimary, int minMemberCount) throws SpawningException { try { if (log.isInfoEnabled()) { log.info(String.format( "Trying to spawn an instance via cloud controller: [cluster] %s [partition] %s [lb-cluster] %s [network-partition-id] %s", clusterId, partition.getId(), lbClusterId, networkPartitionId)); } MemberContext member = new MemberContext(); member.setClusterId(clusterId); member.setPartition(partition); member.setLbClusterId(lbClusterId); member.setInitTime(System.currentTimeMillis()); member.setNetworkPartitionId(networkPartitionId); Properties memberContextProps = new Properties(); Property isPrimaryProp = new Property(); isPrimaryProp.setName("PRIMARY"); isPrimaryProp.setValue(String.valueOf(isPrimary)); Property minCountProp = new Property(); minCountProp.setName("MIN_COUNT"); minCountProp.setValue(String.valueOf(minMemberCount)); memberContextProps.addProperties(isPrimaryProp); memberContextProps.addProperties(minCountProp); member.setProperties(memberContextProps); long startTime = System.currentTimeMillis(); MemberContext memberContext = stub.startInstance(member); if (log.isDebugEnabled()) { long endTime = System.currentTimeMillis(); log.debug(String.format("Service call startInstance() returned in %dms", (endTime - startTime))); } return memberContext; } catch (CloudControllerServiceUnregisteredCartridgeExceptionException e) { String message = e.getFaultMessage().getUnregisteredCartridgeException().getMessage(); log.error(message, e); throw new SpawningException(message, e); } catch (RemoteException e) { log.error(e.getMessage(), e); throw new SpawningException(e.getMessage(), e); } catch (CloudControllerServiceInvalidIaasProviderExceptionException e) { String message = e.getFaultMessage().getInvalidIaasProviderException().getMessage(); log.error(message, e); throw new SpawningException(message, e); } } public synchronized void terminateAllInstances(String clusterId) throws TerminationException { try { if (log.isInfoEnabled()) { log.info(String.format("Terminating all instances of cluster via cloud controller: [cluster] %s", clusterId)); } long startTime = System.currentTimeMillis(); stub.terminateAllInstances(clusterId); if (log.isDebugEnabled()) { long endTime = System.currentTimeMillis(); log.debug(String.format("Service call terminateAllInstances() returned in %dms", (endTime - startTime))); } } catch (RemoteException e) { String msg = e.getMessage(); log.error(msg, e); throw new TerminationException(msg, e); } catch (CloudControllerServiceInvalidClusterExceptionException e) { String message = e.getFaultMessage().getInvalidClusterException().getMessage(); log.error(message, e); throw new TerminationException(message, e); } } public synchronized void terminate(String memberId) throws TerminationException { try { if (log.isInfoEnabled()) { log.info(String.format("Terminating instance via cloud controller: [member] %s", memberId)); } long startTime = System.currentTimeMillis(); stub.terminateInstance(memberId); if (log.isDebugEnabled()) { long endTime = System.currentTimeMillis(); log.debug( String.format("Service call terminateInstance() returned in %dms", (endTime - startTime))); } } catch (RemoteException e) { String msg = e.getMessage(); log.error(msg, e); throw new TerminationException(msg, e); } catch (CloudControllerServiceInvalidMemberExceptionException e) { String msg = e.getFaultMessage().getInvalidMemberException().getMessage(); log.error(msg, e); throw new TerminationException(msg, e); } catch (CloudControllerServiceInvalidCartridgeTypeExceptionException e) { String msg = e.getFaultMessage().getInvalidCartridgeTypeException().getMessage(); log.error(msg, e); throw new TerminationException(msg, e); } } }