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. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.ambari.server.api.services; import java.io.InputStream; import java.util.Collections; import java.util.HashMap; import java.util.Map; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam; import javax.ws.rs.Produces; import javax.ws.rs.core.Context; import javax.ws.rs.core.HttpHeaders; import javax.ws.rs.core.Response; import javax.ws.rs.core.Response.ResponseBuilder; import javax.ws.rs.core.UriInfo; import org.apache.ambari.server.api.resources.ResourceInstance; import org.apache.ambari.server.controller.spi.Resource; import org.apache.commons.io.IOUtils; /** * Service for stacks management. */ @Path("/stacks/") public class StacksService extends BaseService { @GET @Produces("text/plain") public Response getStacks(String body, @Context HttpHeaders headers, @Context UriInfo ui) { return handleRequest(headers, body, ui, Request.Type.GET, createStackResource(null)); } @GET @Path("{stackName}") @Produces("text/plain") public Response getStack(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackResource(stackName)); } @GET @Path("{stackName}/versions") @Produces("text/plain") public Response getStackVersions(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackVersionResource(stackName, null)); } @GET @Path("{stackName}/versions/{stackVersion}") @Produces("text/plain") public Response getStackVersion(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { return handleRequest(headers, body, ui, Request.Type.GET, createStackVersionResource(stackName, stackVersion)); } @GET @Path("{stackName}/versions/{stackVersion}/configurations") @Produces("text/plain") public Response getStackLevelConfigurations(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { return handleRequest(headers, body, ui, Request.Type.GET, createStackLevelConfigurationsResource(stackName, stackVersion, null)); } @GET @Path("{stackName}/versions/{stackVersion}/configurations/{propertyName}") @Produces("text/plain") public Response getStackLevelConfiguration(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName, @PathParam("propertyName") String propertyName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackLevelConfigurationsResource(stackName, stackVersion, propertyName)); } @GET @Path("{stackName}/versions/{stackVersion}/services") @Produces("text/plain") public Response getStackServices(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceResource(stackName, stackVersion, null)); } /** * Handles URL: /clusters/{clusterId}/category * Get all services for a cluster. * * @param headers http headers * @param ui uri info * @return service collection resource representation */ @GET @Path("{stackName}/versions/{stackVersion}/category") @Produces("text/plain") public Response getServicesGroups(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { String SERVICE_TYPE_FILE = "service_type.json"; String result = ""; InputStream rcoInputStream = null; try { rcoInputStream = ClassLoader.getSystemResourceAsStream(SERVICE_TYPE_FILE); result = IOUtils.toString(rcoInputStream); } catch (Exception e) { } finally { if (rcoInputStream != null) { try { rcoInputStream.close(); } catch (Exception e) { System.out.println("inputstream close failed"); } } } ResponseBuilder builder = Response.ok(result); return builder.build(); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}") @Produces("text/plain") public Response getStackService(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceResource(stackName, stackVersion, serviceName)); } @GET @Path("{stackName}/versions/{stackVersion}/artifacts") @Produces("text/plain") public Response getStackArtifacts(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { return handleRequest(headers, body, ui, Request.Type.GET, createStackArtifactsResource(stackName, stackVersion, null)); } @GET @Path("{stackName}/versions/{stackVersion}/artifacts/{artifactName}") @Produces("text/plain") public Response getStackArtifact(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("artifactName") String artifactName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackArtifactsResource(stackName, stackVersion, artifactName)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/artifacts") @Produces("text/plain") public Response getStackServiceArtifacts(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceArtifactsResource(stackName, stackVersion, serviceName, null)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/artifacts/{artifactName}") @Produces("text/plain") public Response getStackServiceArtifact(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName, @PathParam("artifactName") String artifactName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceArtifactsResource(stackName, stackVersion, serviceName, artifactName)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/configurations") @Produces("text/plain") public Response getStackConfigurations(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackConfigurationResource(stackName, stackVersion, serviceName, null)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/configurations/{propertyName}") @Produces("text/plain") public Response getStackConfiguration(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName, @PathParam("propertyName") String propertyName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackConfigurationResource(stackName, stackVersion, serviceName, propertyName)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/components") @Produces("text/plain") public Response getServiceComponents(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceComponentResource(stackName, stackVersion, serviceName, null)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/components/{componentName}/dependencies") @Produces("text/plain") public Response getServiceComponentDependencies(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName, @PathParam("componentName") String componentName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceComponentDependencyResource( stackName, stackVersion, serviceName, componentName, null)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/components/{componentName}/dependencies/{dependencyName}") @Produces("text/plain") public Response getServiceComponentDependency(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName, @PathParam("componentName") String componentName, @PathParam("dependencyName") String dependencyName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceComponentDependencyResource( stackName, stackVersion, serviceName, componentName, dependencyName)); } @GET @Path("{stackName}/versions/{stackVersion}/services/{serviceName}/components/{componentName}") @Produces("text/plain") public Response getServiceComponent(String body, @Context HttpHeaders headers, @Context UriInfo ui, @PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion, @PathParam("serviceName") String serviceName, @PathParam("componentName") String componentName) { return handleRequest(headers, body, ui, Request.Type.GET, createStackServiceComponentResource(stackName, stackVersion, serviceName, componentName)); } /** * Handles ANY /{stackName}/versions/{stackVersion}/operating_systems. * * @param stackName stack name * @param stackVersion stack version * @return operating system service */ @Path("{stackName}/versions/{stackVersion}/operating_systems") public OperatingSystemService getOperatingSystemsHandler(@PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { final Map<Resource.Type, String> stackProperties = new HashMap<Resource.Type, String>(); stackProperties.put(Resource.Type.Stack, stackName); stackProperties.put(Resource.Type.StackVersion, stackVersion); return new OperatingSystemService(stackProperties); } /** * Handles ANY /{stackName}/versions/{stackVersion}/repository_versions. * * @param stackName stack name * @param stackVersion stack version * @return repository version service */ @Path("{stackName}/versions/{stackVersion}/repository_versions") public RepositoryVersionService getRepositoryVersionHandler(@PathParam("stackName") String stackName, @PathParam("stackVersion") String stackVersion) { final Map<Resource.Type, String> stackProperties = new HashMap<Resource.Type, String>(); stackProperties.put(Resource.Type.Stack, stackName); stackProperties.put(Resource.Type.StackVersion, stackVersion); return new RepositoryVersionService(stackProperties); } ResourceInstance createStackServiceComponentResource(String stackName, String stackVersion, String serviceName, String componentName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackService, serviceName); mapIds.put(Resource.Type.StackServiceComponent, componentName); return createResource(Resource.Type.StackServiceComponent, mapIds); } ResourceInstance createStackServiceComponentDependencyResource(String stackName, String stackVersion, String serviceName, String componentName, String dependencyName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackService, serviceName); mapIds.put(Resource.Type.StackServiceComponent, componentName); mapIds.put(Resource.Type.StackServiceComponentDependency, dependencyName); return createResource(Resource.Type.StackServiceComponentDependency, mapIds); } ResourceInstance createStackConfigurationResource(String stackName, String stackVersion, String serviceName, String propertyName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackService, serviceName); mapIds.put(Resource.Type.StackConfiguration, propertyName); return createResource(Resource.Type.StackConfiguration, mapIds); } ResourceInstance createStackServiceResource(String stackName, String stackVersion, String serviceName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackService, serviceName); return createResource(Resource.Type.StackService, mapIds); } ResourceInstance createStackVersionResource(String stackName, String stackVersion) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); return createResource(Resource.Type.StackVersion, mapIds); } ResourceInstance createStackLevelConfigurationsResource(String stackName, String stackVersion, String propertyName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackLevelConfiguration, propertyName); return createResource(Resource.Type.StackLevelConfiguration, mapIds); } ResourceInstance createStackArtifactsResource(String stackName, String stackVersion, String artifactName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackArtifact, artifactName); return createResource(Resource.Type.StackArtifact, mapIds); } ResourceInstance createStackServiceArtifactsResource(String stackName, String stackVersion, String serviceName, String artifactName) { Map<Resource.Type, String> mapIds = new HashMap<Resource.Type, String>(); mapIds.put(Resource.Type.Stack, stackName); mapIds.put(Resource.Type.StackVersion, stackVersion); mapIds.put(Resource.Type.StackService, serviceName); mapIds.put(Resource.Type.StackArtifact, artifactName); return createResource(Resource.Type.StackArtifact, mapIds); } ResourceInstance createStackResource(String stackName) { return createResource(Resource.Type.Stack, Collections.singletonMap(Resource.Type.Stack, stackName)); } }