| /* |
| * 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.slider.providers; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.service.Service; |
| import org.apache.hadoop.yarn.api.records.Container; |
| import org.apache.slider.api.ClusterDescription; |
| import org.apache.slider.common.tools.SliderFileSystem; |
| import org.apache.slider.core.conf.AggregateConf; |
| import org.apache.slider.core.conf.MapOperations; |
| import org.apache.slider.core.exceptions.BadCommandArgumentsException; |
| import org.apache.slider.core.exceptions.SliderException; |
| import org.apache.slider.core.launch.ContainerLauncher; |
| import org.apache.slider.core.main.ExitCodeProvider; |
| import org.apache.slider.core.registry.info.ServiceInstanceData; |
| import org.apache.slider.server.appmaster.state.StateAccessForProviders; |
| import org.apache.slider.server.appmaster.web.rest.agent.AgentRestOperations; |
| import org.apache.slider.server.services.registry.RegistryViewForProviders; |
| import org.apache.slider.server.services.utility.EventCallback; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Map; |
| |
| public interface ProviderService extends ProviderCore, Service, |
| ExitCodeProvider { |
| |
| /** |
| * Set up the entire container launch context |
| * @param containerLauncher |
| * @param instanceDefinition |
| * @param container |
| * @param role |
| * @param sliderFileSystem |
| * @param generatedConfPath |
| * @param appComponent |
| * @param containerTmpDirPath |
| */ |
| void buildContainerLaunchContext(ContainerLauncher containerLauncher, |
| AggregateConf instanceDefinition, |
| Container container, |
| String role, |
| SliderFileSystem sliderFileSystem, |
| Path generatedConfPath, |
| MapOperations resourceComponent, |
| MapOperations appComponent, |
| Path containerTmpDirPath) throws |
| IOException, |
| SliderException; |
| |
| /** |
| * Execute a process in the AM |
| * @param instanceDefinition cluster description |
| * @param confDir configuration directory |
| * @param env environment |
| * @param execInProgress the callback for the exec events |
| * @return true if a process was actually started |
| * @throws IOException |
| * @throws SliderException |
| */ |
| boolean exec(AggregateConf instanceDefinition, |
| File confDir, |
| Map<String, String> env, |
| EventCallback execInProgress) throws IOException, |
| SliderException; |
| |
| /** |
| * Scan through the roles and see if it is supported. |
| * @param role role to look for |
| * @return true if the role is known about -and therefore |
| * that a launcher thread can be deployed to launch it |
| */ |
| boolean isSupportedRole(String role); |
| |
| /** |
| * Load a specific XML configuration file for the provider config |
| * @param confDir configuration directory |
| * @param siteXMLFilename provider-specific filename |
| * @return a configuration to be included in status |
| * @throws BadCommandArgumentsException |
| * @throws IOException |
| */ |
| Configuration loadProviderConfigurationInformation(File confDir) |
| throws BadCommandArgumentsException, IOException; |
| |
| /** |
| * This is a validation of the application configuration on the AM. |
| * Here is where things like the existence of keytabs and other |
| * not-seen-client-side properties can be tested, before |
| * the actual process is spawned. |
| * @param instanceDefinition clusterSpecification |
| * @param confDir configuration directory |
| * @param secure flag to indicate that secure mode checks must exist |
| * @throws IOException IO problemsn |
| * @throws SliderException any failure |
| */ |
| void validateApplicationConfiguration(AggregateConf instanceDefinition, |
| File confDir, |
| boolean secure |
| ) throws IOException, SliderException; |
| |
| /* |
| * Build the provider status, can be empty |
| * @return the provider status - map of entries to add to the info section |
| */ |
| Map<String, String> buildProviderStatus(); |
| |
| /** |
| * Build a map of data intended for the AM webapp that is specific |
| * about this provider. The key is some text to be displayed, and the |
| * value can be a URL that will create an anchor over the key text. |
| * |
| * If no anchor is needed/desired, insert the key with a null value. |
| * @return |
| */ |
| Map<String, String> buildMonitorDetails(ClusterDescription clusterSpec); |
| |
| /** |
| * bind operation -invoked before the service is started |
| * @param stateAccessor interface offering read access to the state |
| * @param registry |
| */ |
| void bind(StateAccessForProviders stateAccessor, |
| RegistryViewForProviders registry); |
| |
| /** |
| * Returns the agent rest operations interface. |
| * @return the interface if available, null otherwise. |
| */ |
| AgentRestOperations getAgentRestOperations(); |
| |
| /** |
| * Build up the endpoint details for this service |
| * @param details |
| */ |
| void buildEndpointDetails(Map<String, String> details); |
| |
| /** |
| * Prior to going live -register the initial service registry data |
| * @param amWebAPI |
| * @param registryInstanceData |
| */ |
| void applyInitialRegistryDefinitions(URL amWebAPI, |
| ServiceInstanceData registryInstanceData) throws MalformedURLException, |
| IOException; |
| } |