| /* |
| * 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.ambari.server.stack; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| import org.apache.ambari.server.AmbariException; |
| import org.apache.ambari.server.ServiceNotFoundException; |
| import org.apache.ambari.server.state.Cluster; |
| import org.apache.ambari.server.state.Clusters; |
| import org.apache.ambari.server.state.ExtensionInfo; |
| import org.apache.ambari.server.state.ServiceInfo; |
| import org.apache.ambari.server.state.StackInfo; |
| import org.apache.ambari.server.state.stack.ExtensionMetainfoXml; |
| import org.apache.ambari.server.utils.VersionUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * An extension version is like a stack version but it contains custom services. Linking an extension |
| * version to the current stack version allows the cluster to install the custom services contained in |
| * the extension version. |
| */ |
| public class ExtensionHelper { |
| |
| private final static Logger LOG = LoggerFactory.getLogger(ExtensionHelper.class); |
| |
| public static void validateDeleteLink(Clusters clusters, StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| validateNotRequiredExtension(stack, extension); |
| validateServicesNotInstalled(clusters, stack, extension); |
| } |
| |
| private static void validateServicesNotInstalled(Clusters clusters, StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| for (Cluster cluster : clusters.getClusters().values()) { |
| for (ServiceInfo service : extension.getServices()) { |
| try { |
| if (service != null && cluster.getService(service.getName()) != null) { |
| String message = "Extension service is still installed" |
| + ", stackName=" + stack.getName() |
| + ", stackVersion=" + stack.getVersion() |
| + ", service=" + service.getName() |
| + ", extensionName=" + extension.getName() |
| + ", extensionVersion=" + extension.getVersion(); |
| |
| throw new AmbariException(message); |
| } |
| } |
| catch (ServiceNotFoundException e) { |
| //Eat the exception |
| } |
| } |
| } |
| } |
| |
| public static void validateCreateLink(StackManager stackManager, StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| validateSupportedStackVersion(stack, extension); |
| validateServiceDuplication(stackManager, stack, extension); |
| validateRequiredExtensions(stack, extension); |
| } |
| |
| public static void validateUpdateLink(StackManager stackManager, StackInfo stack, ExtensionInfo oldExtension, ExtensionInfo newExtension) throws AmbariException { |
| validateSupportedStackVersion(stack, newExtension); |
| validateServiceDuplication(stackManager, stack, oldExtension, newExtension); |
| validateRequiredExtensions(stack, newExtension); |
| } |
| |
| private static void validateSupportedStackVersion(StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| for (ExtensionMetainfoXml.Stack validStack : extension.getStacks()) { |
| if (validStack.getName().equals(stack.getName())) { |
| String minStackVersion = validStack.getVersion(); |
| if (VersionUtils.compareVersions(stack.getVersion(), minStackVersion) >= 0) { |
| //Found a supported stack version |
| return; |
| } |
| } |
| } |
| |
| String message = "Stack is not supported by extension" |
| + ", stackName=" + stack.getName() |
| + ", stackVersion=" + stack.getVersion() |
| + ", extensionName=" + extension.getName() |
| + ", extensionVersion=" + extension.getVersion(); |
| |
| throw new AmbariException(message); |
| } |
| |
| private static void validateServiceDuplication(StackManager stackManager, StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| validateServiceDuplication(stackManager, stack, extension, extension.getServices()); |
| } |
| |
| private static void validateServiceDuplication(StackManager stackManager, StackInfo stack, ExtensionInfo oldExtension, ExtensionInfo newExtension) throws AmbariException { |
| ArrayList<ServiceInfo> services = new ArrayList<>(newExtension.getServices().size()); |
| for (ServiceInfo service : newExtension.getServices()) { |
| boolean found = false; |
| for (ServiceInfo current : oldExtension.getServices()) { |
| if (service.getName().equals(current.getName())) { |
| found = true; |
| } |
| } |
| if (!found) { |
| services.add(service); |
| } |
| } |
| validateServiceDuplication(stackManager, stack, newExtension, services); |
| } |
| |
| private static void validateServiceDuplication(StackManager stackManager, StackInfo stack, ExtensionInfo extension, Collection<ServiceInfo> services) throws AmbariException { |
| LOG.debug("Looking for duplicate services"); |
| for (ServiceInfo service : services) { |
| LOG.debug("Looking for duplicate service " + service.getName()); |
| if (service != null) { |
| ServiceInfo stackService = null; |
| try { |
| stackService = stack.getService(service.getName()); |
| if (stackService != null) { |
| LOG.debug("Found service " + service.getName()); |
| if (isInheritedExtensionService(stackManager, stack, service.getName(), extension.getName())) { |
| stackService = null; |
| } |
| } |
| } |
| catch (Exception e) { |
| //Eat the exception |
| LOG.error("Error validating service duplication", e); |
| } |
| if (stackService != null) { |
| String message = "Existing service is included in extension" |
| + ", stackName=" + stack.getName() |
| + ", stackVersion=" + stack.getVersion() |
| + ", service=" + service.getName() |
| + ", extensionName=" + extension.getName() |
| + ", extensionVersion=" + extension.getVersion(); |
| |
| throw new AmbariException(message); |
| } |
| } |
| } |
| } |
| |
| private static boolean isInheritedExtensionService(StackManager stackManager, StackInfo stack, String serviceName, String extensionName) { |
| // Check if service is from an extension at the current stack level, if so then it isn't inherited from its parent stack version |
| if (isExtensionService(stack, serviceName, extensionName)) { |
| LOG.debug("Service is at requested stack/version level " + serviceName); |
| return false; |
| } |
| |
| return isExtensionService(stackManager, stack.getName(), stack.getParentStackVersion(), serviceName, extensionName); |
| } |
| |
| private static boolean isExtensionService(StackManager stackManager, String stackName, String stackVersion, String serviceName, String extensionName) { |
| LOG.debug("Checking at stack/version " + stackName + "/" + stackVersion); |
| StackInfo stack = stackManager.getStack(stackName, stackVersion); |
| |
| if (stack == null) { |
| LOG.warn("Stack/version not found " + stackName + "/" + stackVersion); |
| return false; |
| } |
| |
| if (isExtensionService(stack, serviceName, extensionName)) { |
| LOG.debug("Stack/version " + stackName + "/" + stackVersion + " contains service " + serviceName); |
| return true; |
| } |
| else { |
| return isExtensionService(stackManager, stackName, stack.getParentStackVersion(), serviceName, extensionName); |
| } |
| } |
| |
| private static boolean isExtensionService(StackInfo stack, String serviceName, String extensionName) { |
| ExtensionInfo extension = stack.getExtension(extensionName); |
| if (extension == null) { |
| LOG.debug("Extension not found " + extensionName); |
| return false; |
| } |
| |
| return extension.getService(serviceName) != null; |
| } |
| |
| private static void validateRequiredExtensions(StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| for (ExtensionMetainfoXml.Extension requiredExtension : extension.getExtensions()) { |
| if (requiredExtension != null) { |
| String message = "Stack has not linked required extension" |
| + ", stackName=" + stack.getName() |
| + ", stackVersion=" + stack.getVersion() |
| + ", extensionName=" + extension.getName() |
| + ", extensionVersion=" + extension.getVersion() |
| + ", requiredExtensionName=" + requiredExtension.getName() |
| + ", requiredExtensionVersion=" + requiredExtension.getVersion(); |
| try { |
| ExtensionInfo stackExtension = stack.getExtension(requiredExtension.getName()); |
| if (stackExtension != null) { |
| String version = requiredExtension.getVersion(); |
| if (version.endsWith("*")) { |
| version = version.substring(0, version.length() - 1); |
| if (!stackExtension.getVersion().startsWith(version)) { |
| throw new AmbariException(message); |
| } |
| } |
| else if (!stackExtension.getVersion().equals(version)) { |
| throw new AmbariException(message); |
| } |
| } |
| } |
| catch (Exception e) { |
| throw new AmbariException(message, e); |
| } |
| } |
| } |
| } |
| |
| private static void validateNotRequiredExtension(StackInfo stack, ExtensionInfo extension) throws AmbariException { |
| for (ExtensionInfo stackExtension : stack.getExtensions()) { |
| if (stackExtension != null) { |
| for (ExtensionMetainfoXml.Extension requiredExtension : stackExtension.getExtensions()) { |
| if (requiredExtension != null && requiredExtension.getName().equals(extension.getName())) { |
| String message = "Stack extension is required by extension" |
| + ", stackName=" + stack.getName() |
| + ", stackVersion=" + stack.getVersion() |
| + ", extensionName=" + extension.getName() |
| + ", extensionVersion=" + extension.getVersion() |
| + ", dependentExtensionName=" + stackExtension.getName() |
| + ", dependentExtensionVersion=" + stackExtension.getVersion(); |
| |
| throw new AmbariException(message); |
| } |
| } |
| } |
| } |
| } |
| |
| } |